JP3531752B2 - Molding machine cylinder and method of manufacturing the same - Google Patents
Molding machine cylinder and method of manufacturing the sameInfo
- Publication number
- JP3531752B2 JP3531752B2 JP24125993A JP24125993A JP3531752B2 JP 3531752 B2 JP3531752 B2 JP 3531752B2 JP 24125993 A JP24125993 A JP 24125993A JP 24125993 A JP24125993 A JP 24125993A JP 3531752 B2 JP3531752 B2 JP 3531752B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- cylinder
- molding machine
- base material
- less
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000465 moulding Methods 0.000 title claims description 51
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000000463 material Substances 0.000 claims description 105
- 238000010438 heat treatment Methods 0.000 claims description 25
- 239000000956 alloy Substances 0.000 claims description 24
- 229910045601 alloy Inorganic materials 0.000 claims description 22
- 238000005260 corrosion Methods 0.000 claims description 21
- 230000007797 corrosion Effects 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 19
- 229910001563 bainite Inorganic materials 0.000 claims description 18
- 238000000137 annealing Methods 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 10
- 238000009750 centrifugal casting Methods 0.000 claims description 10
- 230000009466 transformation Effects 0.000 claims description 10
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims 4
- 229910052742 iron Inorganic materials 0.000 claims 1
- 229910052748 manganese Inorganic materials 0.000 claims 1
- 230000000052 comparative effect Effects 0.000 description 24
- 230000000694 effects Effects 0.000 description 19
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005266 casting Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 150000001247 metal acetylides Chemical class 0.000 description 3
- 238000001000 micrograph Methods 0.000 description 3
- 229910001562 pearlite Inorganic materials 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- 230000004580 weight loss Effects 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000005496 eutectics Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、プラスチック成形機等
に用いる円筒状シリンダ及びその製造方法に関し、詳し
くは耐摩耗性、耐食性、耐クラック性に優れた成形機用
シリンダ及びその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical cylinder used for a plastic molding machine and the like and a method for manufacturing the same, and more particularly to a cylinder for a molding machine having excellent wear resistance, corrosion resistance and crack resistance and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】プラスチック等の成形機用シリンダに
は、加熱成形中の樹脂または樹脂に加えた添加剤による
腐食あるいは摩耗を防止するため、鋼材からなる中空円
筒状のシリンダ母材の内面に、耐摩耗性と耐食性とを有
する合金材料を、遠心鋳造法によりライニングするとい
う構造のものが使用されている。2. Description of the Related Art A cylinder for a molding machine made of plastic or the like has a hollow cylindrical cylinder base material made of steel to prevent corrosion or wear caused by a resin or an additive added to the resin during heat molding. A structure is used in which an alloy material having wear resistance and corrosion resistance is lined by a centrifugal casting method.
【０００３】このような構造の成形機用シリンダには、
近年、生産性を向上するために、射出成形サイクルの短
縮及び耐射出圧力の上昇が望まれているが、そうすると
射出成形サイクルの毎に、上述のような延性の小さい合
金材料からなるライニング材に繰返し膨張、収縮の応力
がかかり、疲労によりクラックが発生しやすくなるの
で、シリンダ母材はできるだけ膨張しないように高強度
にする必要がある。A cylinder for a molding machine having such a structure includes
In recent years, in order to improve productivity, it has been desired to shorten the injection molding cycle and increase the injection pressure resistance. Then, in each injection molding cycle, a lining material made of an alloy material with low ductility as described above is used. Since stress of repeated expansion and contraction is applied and cracks easily occur due to fatigue, the cylinder base material needs to have high strength so as not to expand as much as possible.
【０００４】しかし、上述の成形機用シリンダの母材
は、主としてパーライトと少量のフェライトとからなっ
ているため、高速高圧の射出成形サイクルに対して十分
な強度を有しておらず、その結果ライニング材は膨張、
収縮により疲労破壊を起し、クラックが生じるという問
題がある。However, since the base material of the above-mentioned molding machine cylinder is mainly composed of pearlite and a small amount of ferrite, it does not have sufficient strength for a high-speed and high-pressure injection molding cycle. The lining material expands,
There is a problem that the shrinkage causes fatigue fracture and cracks occur.
【０００５】そこで、これらの性能を向上させる方法と
して、図９に示すように、焼嵌方法によって、補強部材
４をライニング材３とシリンダ母材２とからなる成形機
用シリンダ１に接合する方法が考えられる。しかし、こ
の方法は製造コストが上がるという問題があり、また手
間がかかるため製作手数を長くするという問題がある。Therefore, as a method of improving these performances, as shown in FIG. 9, a method of joining the reinforcing member 4 to the cylinder 1 for a molding machine, which comprises the lining material 3 and the cylinder base material 2, by a shrink fitting method. Can be considered. However, this method has a problem that the manufacturing cost is increased, and it also takes a lot of time and labor to prolong the manufacturing process.
【０００６】[0006]
【発明が解決しようとする課題】従って本発明の目的
は、コストアップ、製作手数延長等の弊害を伴わずに、
疲労強度、耐クラック性、耐摩耗性、耐食性かつ耐凝着
性に優れた成形機用シリンダを提供することである。SUMMARY OF THE INVENTION Therefore, the object of the present invention is to prevent the cost increase, the increase in the number of manufacturing steps, and the like.
A cylinder for a molding machine having excellent fatigue strength, crack resistance, wear resistance, corrosion resistance and adhesion resistance.
【０００７】また本発明のもう一つの目的は、かかる成
形機用シリンダを製造する方法を提供することである。Another object of the present invention is to provide a method of manufacturing such a cylinder for a molding machine.
【０００８】[0008]
【課題を解決するための手段】上記課題に鑑み鋭意研究
の結果、本発明者は、合金鋼からなる中空円筒形状のシ
リンダ母材に、耐摩耗性及び耐食性を有する合金を遠心
鋳造によりライニングした成形機用シリンダを作製する
際に、シリンダ母材を所望の組織とし、このために適当
な熱処理を施すことにより、コストアップ、製作手数延
長等の弊害を伴わずに、疲労強度、特に耐クラック性に
優れた成形機用シリンダが得られることを発見し、本発
明に想到した。As a result of intensive studies in view of the above problems, the present inventor has lined a hollow cylindrical cylinder base material made of alloy steel with an alloy having wear resistance and corrosion resistance by centrifugal casting. When forming a cylinder for a molding machine, the cylinder base material is made to have a desired structure, and by applying an appropriate heat treatment for this purpose, fatigue strength, especially crack resistance can be achieved without adverse effects such as cost increase and extension of manufacturing steps. It was discovered that a cylinder for a molding machine having excellent properties was obtained, and the present invention was conceived.
【０００９】すなわち、本発明の成形機用シリンダは、
合金鋼からなる中空円筒形状のシリンダ母材と、前記シ
リンダ母材の内面に存する耐摩耗性及び耐食性に優れた
ライニング材とを有し、前記シリンダ母材の組織は、ベ
イナイト２０％以上、残部ソルバイトからなることを特
徴とする。That is, the cylinder for the molding machine of the present invention is
It has a hollow cylinder-shaped cylinder base material made of alloy steel and a lining material existing on the inner surface of the cylinder base material and having excellent wear resistance and corrosion resistance, and the structure of the cylinder base material has bainite of 20% or more It is characterized by being composed of sorbite.
【００１０】また本発明の合金鋼からなる中空円筒形状
を有するシリンダ母材と、前記シリンダ母材の内面に存
する耐摩耗性及び耐食性に優れたライニング材とを有
し、前記シリンダ母材の組織が、ベイナイト２０％以
上、残部ソルバイトからなる成形機用シリンダの製造方
法は、前記ライニング材を前記シリンダ母材内に入れて
遠心鋳造後、２０〜２００℃／分の冷却速度でベイナイ
ト変態を起こす温度領域まで冷却し、そこで１０分以上
保持後、１〜１０℃／分の加熱速度で、５５０〜６５０
℃のアニール温度まで加熱し、アニール後室温まで冷却
することを特徴とする。The structure of the cylinder base material has a hollow base material made of the alloy steel of the present invention and having a hollow cylindrical shape, and a lining material existing on the inner surface of the cylinder base material and having excellent wear resistance and corrosion resistance. However, in the method for manufacturing a cylinder for a molding machine, which comprises bainite of 20% or more and the balance of sorbite, the lining material is put into the cylinder base material and centrifugally cast, and then bainite transformation occurs at a cooling rate of 20 to 200 ° C./min. After cooling to a temperature range and holding there for 10 minutes or more, at a heating rate of 1 to 10 ° C./min, 550 to 650
It is characterized by heating to an annealing temperature of ° C and cooling to room temperature after annealing.
【００１１】[0011]
【実施例及び作用】まず、本発明の一実施例による成形
機用シリンダの母材について説明する。本実施例におい
ては、耐摩耗性及び耐食性を有するライニング材を被覆
するシリンダ母材として合金鋼を用いる。合金鋼とし
て、Ｃｒ−Ｍｏ鋼を用いる場合、化学成分の含有率はＣ
0.3〜0.5 重量％、Ｓｉ 0.15〜0.35 重量％、Ｍｎ 0.3
〜1.5 重量％以下、Ｐ 0.03 重量％以下、Ｓ 0.03 重量
％以下、Ｃｒ 0.7〜1.5 重量％、Ｍｏ 0.1〜0.5 重量％
とするのが強度上好ましく、日本工業規格(JIS G 4105)
に規定されている SCM440、SCM445 相当のＣｒ−Ｍｏ鋼
が適する。Embodiments and Functions First, a base material of a molding machine cylinder according to an embodiment of the present invention will be described. In this embodiment, alloy steel is used as a cylinder base material for coating a lining material having wear resistance and corrosion resistance. When Cr-Mo steel is used as the alloy steel, the content rate of chemical components is C
0.3 to 0.5% by weight, Si 0.15 to 0.35% by weight, Mn 0.3
~ 1.5 wt% or less, P 0.03 wt% or less, S 0.03 wt% or less, Cr 0.7 to 1.5 wt%, Mo 0.1 to 0.5 wt%
Is preferable in terms of strength, Japanese Industrial Standards (JIS G 4105)
Cr-Mo steels equivalent to SCM440 and SCM445 specified in the above are suitable.
【００１２】合金鋼として、Ｎｉ−Ｃｒ−Ｍｏ鋼を用い
る場合、化学成分の含有率はＣ 0.3〜0.5 重量％、Ｓｉ
0.15〜0.35 重量％、Ｍｎ 0.3〜1.5 重量％以下、Ｐ
0.03重量％以下、Ｓ 0.03 重量％以下、Ｎｉ 3.0 重量
％以下、Ｃｒ 0.7〜1.5 重量％、Ｍｏ 0.1〜0.5 重量％
とするのが強度上好ましく、日本工業規格(JIS G 4103)
に規定されている SNCM439 相当のＮｉ−Ｃｒ−Ｍｏ鋼
が適する。When Ni-Cr-Mo steel is used as the alloy steel, the content of chemical components is C 0.3 to 0.5% by weight, and Si is
0.15 to 0.35% by weight, Mn 0.3 to 1.5% by weight or less, P
0.03% by weight or less, S 0.03% by weight or less, Ni 3.0% by weight or less, Cr 0.7 to 1.5% by weight, Mo 0.1 to 0.5% by weight
Is preferable in terms of strength, Japanese Industrial Standards (JIS G 4103)
A Ni-Cr-Mo steel equivalent to SNCM439 specified in 1 is suitable.
【００１３】また本実施例においては、シリンダ母材の
強度を向上するために、組織の２０％以上をベイナイト
により形成し、残部をソルバイトにより形成する。組織
のベイナイトが２０％未満であると十分な強度が得られ
ないため好ましくない。Further, in this embodiment, in order to improve the strength of the cylinder base material, 20% or more of the structure is made of bainite and the rest is made of sorbite. If the bainite of the structure is less than 20%, sufficient strength cannot be obtained, which is not preferable.
【００１４】以上に示す組織構成とするために、本実施
例においては、上述したライニング材を上述したシリン
ダ母材内に入れて遠心鋳造後、熱処理を施すが、この熱
処理方法を図１に示す熱処理パターンにより説明する。In order to obtain the above-mentioned structure, in this embodiment, the above-mentioned lining material is put into the above-mentioned cylinder base material, centrifugally cast and then heat-treated, and this heat-treatment method is shown in FIG. The heat treatment pattern will be described.
【００１５】ここで、図１の横軸は時間、縦軸は温度を
示しており、また熱処理パターン上のＡは遠心鋳造工
程、Ｂは冷却工程、Ｃは保持工程、Ｄは加熱工程、Ｅは
アニール工程、Ｆは室温までの冷却工程を示している。Here, the horizontal axis of FIG. 1 represents time, the vertical axis represents temperature, and A on the heat treatment pattern is a centrifugal casting step, B is a cooling step, C is a holding step, D is a heating step, and E is an E step. Indicates an annealing step, and F indicates a cooling step to room temperature.
【００１６】本実施例においては、Ａに示す遠心鋳造工
程により、成形機用シリンダを形成し、その後Ｂに示す
冷却工程において、ベイナイト変態を起こす温度領域ま
で冷却するが、この時の冷却速度は２０〜２００℃／分
である。冷却速度が２０℃／分未満であると、トルース
タイトを生じ、また２００℃／分を超えると、ライニン
グ材の内面に割れが生じやすくなる。In the present embodiment, a cylinder for a molding machine is formed by the centrifugal casting process shown in A, and then in a cooling process shown in B, the temperature is cooled to a temperature range where bainite transformation occurs. The cooling rate at this time is 20 to 200 ° C./min. If the cooling rate is less than 20 ° C./min, troostite is generated, and if it exceeds 200 ° C./min, cracks are likely to occur on the inner surface of the lining material.
【００１７】次いでＣに示す保持工程において、ベイナ
イト変態を起こす領域は３００〜６００℃である。ベイ
ナイト変態を起こす領域が３００℃未満であると低温で
の母材の変態膨張によりライニング材の内面に割れが生
じやすくなり、また６００℃を超えるとパーライトが生
じる。Next, in the holding step shown in C, the region where bainite transformation occurs is 300 to 600 ° C. If the region in which bainite transformation occurs is less than 300 ° C, cracking easily occurs on the inner surface of the lining material due to transformation expansion of the base material at low temperature, and if it exceeds 600 ° C, pearlite occurs.
【００１８】また保持工程における保持時間は１０分以
上必要である。保持時間が１０分未満であるとシリンダ
母材のベイナイト量が２０％未満となり、十分な強度が
得られなくなる。Further, the holding time in the holding step needs to be 10 minutes or more. If the holding time is less than 10 minutes, the amount of bainite in the cylinder base material is less than 20%, and sufficient strength cannot be obtained.
【００１９】次いでＤに示すアニール温度まで加熱を行
うが、この時、加熱速度は１〜１０℃／分である。加熱
速度が１℃／分未満であと、シリンダ母材のベイナイト
量が過多となり、ライニング材の内面に割れを発生しや
すくなる。また１０℃／分を超えると、逆にベイナイト
量が不足して強度が得られなくなる。Next, heating is performed up to the annealing temperature shown in D, at which time the heating rate is 1 to 10 ° C./minute. If the heating rate is less than 1 ° C./minute, the amount of bainite in the cylinder base material becomes excessive and cracks are likely to occur on the inner surface of the lining material. On the other hand, if it exceeds 10 ° C./minute, the amount of bainite is insufficient and strength cannot be obtained.
【００２０】次いでＥに示すアニールを行うが、アニー
ル温度は５５０〜６５０℃である。５５０℃未満である
と残留応力除去というアニールの目的を果たさず、また
６５０℃を超えると金属組織に影響をおよぼす。また、
アニール時間は１〜５時間である。アニール時間が１時
間未満であると十分に残留応力を除去できず、５時間を
超えた場合はその効果に著しい変化がない。Next, the annealing shown in E is performed, and the annealing temperature is 550 to 650 ° C. If it is less than 550 ° C, the purpose of annealing for removing residual stress is not fulfilled, and if it exceeds 650 ° C, it affects the metal structure. Also,
The annealing time is 1 to 5 hours. If the annealing time is less than 1 hour, the residual stress cannot be sufficiently removed, and if it exceeds 5 hours, the effect is not significantly changed.
【００２１】最後にＦに示すように室温まで冷却する。
以上により形成される本実施例の成形機用シリンダは、
シリンダ母材の強度が著しく向上するため、優れた疲労
強度、特に耐クラック性を有する。Finally, as shown in F, the temperature is cooled to room temperature.
The molding machine cylinder of the present embodiment formed as described above,
Since the strength of the cylinder base material is remarkably improved, it has excellent fatigue strength, especially crack resistance.
【００２２】次に本実施例に用いる耐摩耗性及び耐食性
を有するライニング材を構成する合金成分について説明
する。Next, the alloy components constituting the lining material having wear resistance and corrosion resistance used in this embodiment will be described.
【００２３】Ｃｒの含有率は 5.0〜20.0 重量％であ
る。ＣｒはＣ、Ｂと結合して炭化物、硼化物を形成し、
耐摩耗性を向上させる作用を有し、また、Ｎｉ基地中に
固溶して強度と耐食性を向上させる作用を有するが、2
0.0 重量％を超えると合金の融点を著しく上昇させて鋳
造性を損なうため好ましくない。5.0 重量％未満ではそ
の効果を発揮しない。特に好ましいＣｒの含有率は 10.
0〜15.0 重量％である。The Cr content is 5.0 to 20.0% by weight. Cr combines with C and B to form carbides and borides,
It has the effect of improving wear resistance, and also has the effect of forming a solid solution in the Ni base to improve strength and corrosion resistance.
If it exceeds 0.0% by weight, the melting point of the alloy is remarkably increased and the castability is impaired, which is not preferable. If it is less than 5.0% by weight, the effect is not exhibited. Particularly preferable Cr content is 10.
It is 0 to 15.0% by weight.
【００２４】Ｂの含有率は 1.5〜4.0 重量％である。Ｂ
はＣｒ、Ｗ、Ｍｏと結して組織中に高硬度の硼化物を析
出させ、合金の硬度を向上させる作用を有するが、1.5
重量％未満ではその効果が十分ではなく、4.0重量％を
超えると超共晶組織が粗大化し、かつ脆性を増すので好
ましくない。The B content is 1.5 to 4.0% by weight. B
Has a function of improving the hardness of the alloy by binding with Cr, W and Mo to precipitate a boride of high hardness in the structure,
If less than 4.0% by weight, the effect is not sufficient, and if more than 4.0% by weight, the supereutectic structure becomes coarse and brittleness increases, which is not preferable.
【００２５】またＣｒ量とＢ量の関係は、Ｃｒ量を増す
場合はＢ量を減らし、Ｃｒ量を減らす場合、Ｂ量を増す
ことにより、合金が微細な組織となり強度の大きい共晶
組成となる。すなわちＣｒ 10重量％のときＢ約2.5重量
％が本実施例における合金の共晶組成であり、このＣｒ
とＢの均衡を保つのが好ましい。またＣｒ 10重量％の
ときＷ 5〜7 重量％、Ｍｏ 3〜8 重量％の均衡を保つの
が好ましい。The relationship between the Cr amount and the B amount is such that when the Cr amount is increased, the B amount is decreased, and when the Cr amount is decreased, the B amount is increased to make the alloy have a fine structure and a eutectic composition having high strength. Become. That is, when Cr is 10% by weight, about 2.5% by weight of B is the eutectic composition of the alloy in this embodiment.
It is preferable to balance B and B. When Cr is 10% by weight, it is preferable to keep the balance of W 5 to 7% by weight and Mo 3 to 8% by weight.
【００２６】Ｃの含有率は 0.7 重量％以下である。Ｃ
は基地の硬さと強度を向上させる作用を有するが、0.7
重量％を超えると共晶度が上昇して脆くなり、強度が低
下するため好ましくない。The C content is 0.7% by weight or less. C
Has the effect of improving the hardness and strength of the base, but 0.7
If it exceeds 5% by weight, the degree of eutecticity increases to make it brittle and the strength decreases, which is not preferable.
【００２７】Ｓｉの含有率は 1.0〜4.0 重量％である。
Ｓｉは合金の融点を低下させ、鋳造性を向上する作用を
有するが、1.0重量％未満では、その作用が不十分とな
るため好ましくない。またＳｉはＮｉ、Ｃｕと金属化合
物を形成して基地中に析出するため、耐摩耗性を向上さ
せる作用を有するが、4.0重量％を超えると合金の靭性
を損うため好ましくない。The Si content is 1.0 to 4.0% by weight.
Si has the effect of lowering the melting point of the alloy and improving the castability, but if it is less than 1.0% by weight, the effect becomes insufficient, which is not preferable. Further, Si forms a metal compound with Ni and Cu and precipitates in the matrix, so that it has an effect of improving wear resistance, but if it exceeds 4.0% by weight, the toughness of the alloy is impaired, which is not preferable.
【００２８】Ｍｎは脱酸材としての作用をするが、その
効果から含有率は 2.0重量％以下とする。Mn acts as a deoxidizing agent, but due to its effect the content is set to 2.0% by weight or less.
【００２９】Ｆｅの含有率は 5.0〜20.0 重量％であ
る。Ｆｅは当初合金中に含有されなくても、鋼材からな
るシリンダ母材との溶着反応によりシリンダ母材から侵
入する。所定量のＦｅがシリンダ母材から合金へ移行す
ることがライニング材とシリンダ母材との完全な溶着を
遂行する上で必要であるが、Ｆｅが 5.0重量％未満で
は、その効果を発揮しない。またＦｅが増加すると硬さ
を低下させ、20.0重量％を超えるとその影響が無視でな
くなるため、好ましくない。The Fe content is 5.0 to 20.0% by weight. Even if Fe is not initially contained in the alloy, it intrudes from the cylinder base material by a welding reaction with the cylinder base material made of steel. It is necessary for a predetermined amount of Fe to transfer from the cylinder base material to the alloy in order to achieve complete welding of the lining material and the cylinder base material, but if Fe is less than 5.0% by weight, the effect is not exhibited. Further, if Fe is increased, the hardness is lowered, and if it exceeds 20.0% by weight, its influence cannot be ignored, which is not preferable.
【００３０】Ｃｕの含有率は 5.0〜20.0 重量％であ
る。ＣｕはＮｉ基地中に固溶して合金の融点を低下させ
るたる鋳造性を向上させるとともに、特にふっ酸に対す
る耐食性を向上させる作用を有するが、 5.0重量％未満
ではその作用が不十分であり、また 20.0重量％を超え
ると硬さを著しく低下させるため好ましくない。特に好
ましくは 8.0〜15.0 重量％である。The Cu content is 5.0 to 20.0% by weight. Cu has a function of improving the castability, which is a solid solution in the Ni base to lower the melting point of the alloy, and particularly improves the corrosion resistance to hydrofluoric acid, but if it is less than 5.0% by weight, the function is insufficient. Further, if it exceeds 20.0% by weight, the hardness is remarkably lowered, which is not preferable. Particularly preferably, it is 8.0 to 15.0% by weight.
【００３１】Ｗの含有率は 3.0〜15.0 重量％である。
ＷもＣｒ同様、炭化物、硼化物を形成し、耐摩耗性を向
上させる作用を有すると共にＣｕと相乗的に作用して耐
食性を向上させる。また、組織を微細化させる作用も有
するので高強度化に寄与する。3.0重量％未満では上記
効果は不十分であり、15.0重量％を超えると鋳造性を悪
くするので好ましくない。特に好ましくは 5.0〜10.0
重量％である。The W content is 3.0 to 15.0% by weight.
Like Cr, W also forms carbides and borides, has the effect of improving wear resistance, and acts synergistically with Cu to improve corrosion resistance. Further, since it also has the function of refining the structure, it contributes to the increase in strength. If it is less than 3.0% by weight, the above effect is insufficient, and if it exceeds 15.0% by weight, the castability is deteriorated, which is not preferable. Particularly preferably 5.0 to 10.0
% By weight.
【００３２】Ｍｏの含有率は 2.0〜12.0 重量％であ
る。ＭｏもＷ、Ｃｒ同様、炭化物、硼化物を形成し、耐
摩耗性を向上させると共に、一部のＭｏは基地組織中に
も固溶し耐食性をも向上させる。特に、本発明によるＭ
ｏを添加することにより、本合金を遠心鋳造する際、母
材側にＷの遠心分離による偏析を発生しやすい傾向を抑
制し、ライニング層全体にＷ、Ｍｏを主体とした硼化物
を均質晶出させる。2.0重量％未満ではこの作用が不十
分であり、12.0重量％を超えるとＭｏ主体の硼化物を形
成し、ライニング層の機械的強度が低下し問題となる。The Mo content is 2.0 to 12.0% by weight. Like W and Cr, Mo also forms carbides and borides to improve wear resistance, and some Mo also forms a solid solution in the matrix structure to improve corrosion resistance. In particular, M according to the invention
The addition of o suppresses the tendency for segregation of W due to centrifugal separation on the base metal side during centrifugal casting of the present alloy, and makes the boride mainly composed of W and Mo uniform crystals in the entire lining layer. Let out. If it is less than 2.0% by weight, this action is insufficient, and if it exceeds 12.0% by weight, a boride containing Mo as a main component is formed and the mechanical strength of the lining layer is lowered, which becomes a problem.
【００３３】Ｃｏの含有率は 3.0〜20.0 重量％であ
る。ＣｏはＣｒ及びＢと化合して硼化物を形成し、耐摩
耗性と耐食性を向上させるが、Ｃｏ含有量の増大にとも
なう製造原価の上昇により経済的効果を損なうので、そ
の上限を 20.0重量％とする。また、5.0重量％未満では
その効果が得られない。Ｎｉは耐摩耗性、耐食性を与え
るため基合金成分として残量％とする。The Co content is 3.0 to 20.0% by weight. Co combines with Cr and B to form a boride, which improves wear resistance and corrosion resistance, but increases the manufacturing cost due to the increase in Co content, which impairs the economic effect. Therefore, its upper limit is 20.0% by weight. And If it is less than 5.0% by weight, the effect cannot be obtained. Ni provides the wear resistance and the corrosion resistance, so that the remaining amount is% as a base alloy component.
【００３４】さらに本実施例においては、上述のライニ
ング材中に、ＮｂＣを分散させることにより、耐摩耗性
をさらに向上することができる。この場合、ＮｂＣの大
きさは５０μｍ以下の微粒子状であるのが好ましい。ま
た、ＮｂＣの好ましい含有率は、ライニング材 100重量
部当り、3.0〜20.0重量部である。Further, in this embodiment, the wear resistance can be further improved by dispersing NbC in the above-mentioned lining material. In this case, the size of NbC is preferably 50 μm or less in the form of fine particles. The preferable NbC content is 3.0 to 20.0 parts by weight per 100 parts by weight of the lining material.
【００３５】ＮｂＣは前記ライニング材 100重量部に対
して、3.0重量部未満ではその効果が得られず、また 2
0.0重量部を超えるとライニング材の粘度が大きくな
り、遠心鋳造法による均一なライニング層を形成するこ
とができなくなるとともに、強度の低下が大きくなる。If NbC is less than 3.0 parts by weight with respect to 100 parts by weight of the lining material, the effect cannot be obtained.
If it exceeds 0.0 parts by weight, the viscosity of the lining material increases, and it becomes impossible to form a uniform lining layer by the centrifugal casting method, and the strength decreases greatly.
【００３６】本発明を以下の具体的実施例により詳細に
説明する。熱処理サイクルは図１を参照して説明する。
（実施例１）日本工業規格(JIS G 4105)に規定されるSC
M440相当のＣｒ−Ｍｏ鋼を用いて、シリンダ母材を形成
した。The present invention will be described in detail with reference to the following specific examples. The heat treatment cycle will be described with reference to FIG. (Example 1) SC specified in Japanese Industrial Standards (JIS G 4105)
The cylinder base material was formed using Cr-Mo steel equivalent to M440.
【００３７】次いで、ライニング材用合金を形成するた
めに、表１に示す組成の合金を配合するが、鋳造中にシ
リンダ母材からＦｅが移行するため、この移行するＦｅ
量を見込んだ配合とした。Next, in order to form an alloy for the lining material, alloys having the compositions shown in Table 1 are blended. Since Fe migrates from the cylinder base material during casting, this migrated Fe
The composition was set in consideration of the amount.
【００３８】[0038]
【表１】 [Table 1]
【００３９】このようにして配合されたライニング材用
本発明合金を加熱溶解した後、加熱炉中にて１１５０℃
に加熱したシリンダ母材の中空部に鋳込温度１４５０℃
で遠心鋳造した（図１に示すＡ）。The alloy of the present invention for a lining material thus blended is melted by heating and then heated at 1150 ° C. in a heating furnace.
Casting temperature 1450 ℃ in the hollow part of the cylinder base material
By centrifugal casting (A shown in FIG. 1).
【００４０】次いで、冷却温度４０℃／分で、４８０℃
のベイナイト変態を起こす温度まで冷却した後（図１に
示すＢ）、２０分間保持し（図１に示すＣ）、次いで、
加熱速度５℃／分で６３０℃のアニール温度まで再加熱
した後（図１に示すＤ）、５時間保持してアニールを行
い（図１に示すＥ）、室温に至るまで冷却した（図１に
示すＦ）。Then, at a cooling temperature of 40 ° C./minute, 480 ° C.
After cooling to a temperature at which bainite transformation occurs (B shown in FIG. 1), it is held for 20 minutes (C shown in FIG. 1), and then
After reheating to an annealing temperature of 630 ° C. at a heating rate of 5 ° C./min (D shown in FIG. 1), annealing was performed for 5 hours (E shown in FIG. 1) and then cooled to room temperature (FIG. 1). F).
【００４１】以上により形成された、成形機用シリンダ
のライニング材の金属組織を図６に示す。また、シリン
ダ母材の組織は、図７の金属組織に示すように、約５０
％のソルバイトとに形成された。FIG. 6 shows the metallographic structure of the lining material of the molding machine cylinder formed as described above. Further, the structure of the cylinder base material is about 50 as shown in the metal structure of FIG.
Formed with% sorbite.
【００４２】（実施例２）日本工業規格(JIS G 4103)に
規定されるSCM439相当のＮｉ−Ｃｒ−Ｍｏ鋼を用いて、
シリンダ母材を形成し、次いで、実施例１と同様の構成
のライニング材を同様の方法により形成した。(Example 2) Using Ni-Cr-Mo steel equivalent to SCM439 specified in Japanese Industrial Standards (JIS G 4103),
A cylinder base material was formed, and then a lining material having the same structure as in Example 1 was formed by the same method.
【００４３】上記シリンダ母材に上記ライニング材を鋳
込温度１４５０℃で遠心鋳造して（図１に示すＡ）成形
機用シリンダを作製し、次いで熱処理を施したが、その
際の熱処理条件は、冷却温度２０℃／分（図１に示す
Ｂ）ベイナイト変態を起こす温度４５０℃、保持時間２
０分（図１に示すＣ）、加熱速度５℃／分（図１に示す
Ｄ）、アニール温度６００℃、アニール時間５時間（図
１に示すＥ）であり、それ以外の条件は実施例１と同様
とした。The above lining material was centrifugally cast on the above cylinder base material at a casting temperature of 1450 ° C. (A shown in FIG. 1) to prepare a cylinder for a molding machine, which was then heat treated. Cooling temperature 20 ° C./min (B shown in FIG. 1) temperature 450 ° C. at which bainite transformation occurs, holding time 2
0 minutes (C shown in FIG. 1), a heating rate of 5 ° C./minute (D shown in FIG. 1), an annealing temperature of 600 ° C., an annealing time of 5 hours (E shown in FIG. 1). The same as 1.
【００４４】（実施例３）実施例１と同様のＣｒ−Ｍｏ
鋼を用いて、シリンダ母材を形成し、次いで、実施例１
と同様の化学成分含有率を有するライニング材に、前記
ライニング材１００重量部に対して１０重量部のＮｂＣ
を含有するようにライニング材用合金を配合し、実施例
１と同様の方法でライニング材を形成した。(Example 3) Cr-Mo similar to Example 1
Steel is used to form the cylinder preform and then Example 1
A lining material having the same chemical composition as described above, and 10 parts by weight of NbC per 100 parts by weight of the lining material.
The alloy for a lining material was blended so as to contain, and a lining material was formed in the same manner as in Example 1.
【００４５】上記シリンダ母材に上記ライニング材を鋳
込温度１４５０℃で遠心鋳造して成形機用シリンダを作
製し、次いで熱処理を施したが、その際の熱処理条件は
実施例１と同様とした。The lining material was centrifugally cast on the cylinder base material at a casting temperature of 1450 ° C. to prepare a cylinder for a molding machine, which was then heat treated. The heat treatment conditions were the same as in Example 1. .
【００４６】（実施例４）実施例２と同様のＮｉ−Ｃｒ
−Ｍｏ鋼を用いて、シリンダ母材を形成し、実施例１と
同様の化学成分含有率を有する合金１００重量部に対し
て１０重量部のＮｂＣ微粒子を配合することにより、実
施例１と同様の方法でライニング材を形成した。(Example 4) Ni-Cr similar to Example 2
Similar to Example 1 by forming a cylinder base material using —Mo steel and blending 10 parts by weight of NbC fine particles with 100 parts by weight of an alloy having the same chemical content as in Example 1. The lining material was formed by the method of.
【００４７】上記シリンダ母材に上記ライニング材を１
４５０℃の温度で遠心鋳造して成形機用シリンダを作製
し、次いで熱処理を施したが、その際の熱処理条件は実
施例１と同様とした。The above lining material is added to the above cylinder base material.
Centrifugal casting was performed at a temperature of 450 ° C. to produce a cylinder for a molding machine, and then heat treatment was performed. The heat treatment conditions at that time were the same as in Example 1.
【００４８】（比較例）実施例１と同様のＣｒ−Ｍｏ鋼
を用いて、シリンダ母材を形成し、次いで表１に示す組
成の合金を用いて、実施例１と同様の方法でライニング
材を形成した。Comparative Example A Cr-Mo steel similar to that used in Example 1 was used to form a cylinder base material, and then an alloy having the composition shown in Table 1 was used to perform a lining material in the same manner as in Example 1. Was formed.
【００４９】上記シリンダ母材に上記ライニング材を１
１００℃の温度で遠心鋳造して（図１に示すＡ）成形機
用シリンダを作製し、次いで熱処理を施したが、その際
の熱処理条件は、冷却速度６０℃／分（図１に示す
Ｂ）、ベイナイト変態を起こす直前の温度６２０℃まで
冷却、保持時間２０分（図１に示すＣ）、加熱速度５℃
／分（図１に示すＤ）、アニール温度６３０℃、アニー
ル時間５時間（図１に示すＥ）であり、それ以外の条件
は実施例１と同様とした。One piece of the lining material is added to the cylinder base material.
Centrifugal casting at a temperature of 100 ° C. (A shown in FIG. 1) was used to prepare a cylinder for a molding machine, and then heat treatment was performed. The heat treatment conditions at that time were a cooling rate of 60 ° C./min (B shown in FIG. ), Cooling to a temperature of 620 ° C. immediately before the bainite transformation occurs, holding time of 20 minutes (C shown in FIG. 1), heating rate of 5 ° C.
/ Min (D shown in FIG. 1), annealing temperature 630 ° C., annealing time 5 hours (E shown in FIG. 1), and other conditions were the same as in Example 1.
【００５０】以上により形成された、成形機用シリンダ
のシリンダ母材組織は、図８の金属組織に示すように、
パーライトを約９０％有し、残部はフェライトで構成さ
れていた。The cylinder base material structure of the molding machine cylinder formed as described above is as shown in the metal structure of FIG.
It had about 90% pearlite with the balance being ferrite.
【００５１】上述の実施例１〜４及び比較例の成形機用
シリンダについて、ライニング材の引張強さ（曲げ強さ
とワイブル値から算出した値）及びシリンダ母材の降伏
点応力を計測した。実施例１〜４について、ほぼ同様の
結果が得られたため、実施例１、比較例の結果を図２に
示す。With respect to the molding machine cylinders of Examples 1 to 4 and Comparative Example described above, the tensile strength of the lining material (value calculated from bending strength and Weibull value) and the yield stress of the cylinder base material were measured. Since almost the same results were obtained for Examples 1 to 4, the results of Example 1 and the comparative example are shown in FIG.
【００５２】さらに上述の実施例１〜４及び比較例の成
形機用シリンダについて、耐圧強度を計測した。実施例
１〜４について、ほぼ同様の結果が得られたため、実施
例１、比較例の結果を図３に示す。Further, the compressive strengths of the molding machine cylinders of Examples 1 to 4 and Comparative Example described above were measured. Since almost the same results were obtained for Examples 1 to 4, the results of Example 1 and the comparative example are shown in FIG.
【００５３】上述の実施例１〜４及び比較例の成形機用
シリンダから、10mm×15mm×10mmの大きさの試料を作製
し、＃400の研磨紙に、荷重2.0kgで押圧し、480mの距離
を摺動させた後ライニング材の摩耗量を調べた。この結
果を、比較例の結果を１０とした時の相対値によって表
し、耐摩耗性を評価した。実施例２は実施例１と、実施
例４は実施例３と同様の結果が得られたため、実施例
１、３及び比較例の結果を図４に示す。Samples having a size of 10 mm × 15 mm × 10 mm were prepared from the molding machine cylinders of Examples 1 to 4 and Comparative Example described above, and were pressed against # 400 abrasive paper with a load of 2.0 kg to obtain 480 m of 480 m. After sliding for a distance, the amount of wear of the lining material was examined. This result was expressed by a relative value when the result of the comparative example was set to 10, and the abrasion resistance was evaluated. Since the same results as in Example 1 and Example 3 were obtained in Example 2 and Example 4, the results of Examples 1 and 3 and Comparative Example are shown in FIG.
【００５４】さらに上述の実施例１〜４及び比較例の成
形機用シリンダから、1.5mm×4mm×10mmの大きさの試料
を作製し、５０℃の１０％ＨＣｌ水溶液中に２４時間浸
潰した後に、ライニング材の腐食減量率を調べた。この
結果を、比較例の結果を１とした時の相対値によって表
し、耐食性を評価した。実施例１〜４については同様の
結果が得られたため、実施例１、比較例について結果を
図５に示す。Further, a sample having a size of 1.5 mm × 4 mm × 10 mm was prepared from the molding machine cylinders of Examples 1 to 4 and Comparative Example described above and immersed in a 10% HCl aqueous solution at 50 ° C. for 24 hours. Later, the corrosion weight loss rate of the lining material was examined. This result was expressed as a relative value when the result of the comparative example was set to 1, and the corrosion resistance was evaluated. Since similar results were obtained for Examples 1 to 4, the results for Example 1 and the comparative example are shown in FIG.
【００５５】図２から明らかなように、実施例１の成形
機用シリンダを形成するライニング材の引張強さは、比
較例の成形機用シリンダに比べて、約２倍以上に著しく
向上した。As is apparent from FIG. 2, the tensile strength of the lining material forming the molding machine cylinder of Example 1 was remarkably improved by about two times or more as compared with the molding machine cylinder of the comparative example.
【００５６】また実施例１のシリンダ母材の降伏点応力
は、比較例に対して８０％以上向上した。The yield stress of the cylinder base material of Example 1 was improved by 80% or more as compared with the comparative example.
【００５７】さらに図３から明らかなように、実施例１
の成形機用シリンダの耐圧強度は、比較例の成形機用シ
リンダに対して約８０％向上した。Further, as is clear from FIG. 3, Example 1
The compressive strength of the molding machine cylinder of No. 1 was improved by about 80% as compared with the molding machine cylinder of the comparative example.
【００５８】以上により、本実施例における成形機用シ
リンダは、ライニング材が十分な強度を有するととも
に、シリンダ母材の強度が飛躍的に向上したため、耐ク
ラック性が著しく向上した。As described above, in the molding machine cylinder according to the present embodiment, the lining material has sufficient strength, and the strength of the cylinder base material is remarkably improved, so that the crack resistance is remarkably improved.
【００５９】実施例１のライニング材の耐摩耗性につい
ては、図４に示すように、耐摩耗性の評価は、比較例を
１０とした時の相対値が７となり、摩耗量が減少してお
り、耐摩耗性の向上が認められる。Regarding the wear resistance of the lining material of Example 1, as shown in FIG. 4, the relative value of the wear resistance was 7 when Comparative Example 10 was set, and the wear amount decreased. And the wear resistance is improved.
【００６０】また、実施例１のライニング材の酸に対す
る比較例を１とした時の相対値は１．０となり、腐食減
量率が同じであり、十分な耐食性が得られた。Further, the relative value of Comparative Example 1 with respect to the acid of the lining material of Example 1 was 1.0, the corrosion weight loss rate was the same, and sufficient corrosion resistance was obtained.
【００６１】実施例３の成形機用シリンダについては、
実施例１とほぼ同様の結果が得られた。しかし、ライニ
ング材の耐摩耗性については、図４に示すように、比較
例を１０とした得の相対値が４以下と、６０％以上摩耗
量を減少し、耐摩耗性を飛躍的に向上することができ
た。Regarding the cylinder for the molding machine of Example 3,
Results similar to those in Example 1 were obtained. However, as for the wear resistance of the lining material, as shown in FIG. 4, the relative value obtained as Comparative Example 10 is 4 or less, the wear amount is reduced by 60% or more, and the wear resistance is dramatically improved. We were able to.
【００６２】以上、実施例１及び実施例３を例にとって
比較例と比較したが、実施例１と同様の結果を得た実施
例２、実施例３と同様の結果を得た実施例４についても
同様の効果を発揮することは勿論である。As described above, Example 1 and Example 3 were used as examples to compare with Comparative Example, and Example 2 which obtained the same result as Example 1 and Example 4 which obtained the same result as Example 3 Needless to say, the same effect is exhibited.
【００６３】以上の結果のまとめとして、表１に示した
本発明ライニング材の特性を比較例と併せて表２に示
す。As a summary of the above results, the characteristics of the lining material of the present invention shown in Table 1 are shown in Table 2 together with the comparative examples.
【００６４】[0064]
【表２】 [Table 2]
【００６５】[0065]
【発明の効果】以上詳述したように、本発明の成形機用
シリンダは、合金鋼からなる中空円筒形状のシリンダ母
材に、耐摩耗性合金からなるライニング材を設けている
が、本発明の方法に従って熱処理を施すことによって、
シリンダ母材の組織の２０％以上をベイナイトにより形
成し、残部をソルバイトにより形成している。As described in detail above, in the cylinder for a molding machine of the present invention, a lining material made of a wear-resistant alloy is provided on a hollow cylindrical cylinder base material made of alloy steel. By applying heat treatment according to the method of
20% or more of the structure of the cylinder base material is formed of bainite, and the rest is formed of sorbite.
【００６６】これにより、高速高圧の射出サイクルに対
応して、ライニング材に膨脹、収縮の応力がかかる場合
でも、シリンダ母材が優れた強度を有するので、ライニ
ング材に生じる歪みを抑え、優れた疲労強度、耐クラッ
ク性を有する成形機用シリンダを、コストアップ、製作
手数延長等の弊害を伴わずに得ることができる。As a result, even when the lining material is subjected to expansion and contraction stresses in response to a high-speed and high-pressure injection cycle, the cylinder base material has excellent strength, so that the strain generated in the lining material is suppressed and the lining material is excellent. A cylinder for a molding machine having fatigue strength and crack resistance can be obtained without any adverse effects such as an increase in cost and an increase in the number of manufacturing steps.
【図１】本発明の実施例成形機用シリンダの熱処理工程
を示すパターン図である。FIG. 1 is a pattern diagram showing a heat treatment process of a molding machine cylinder according to an embodiment of the present invention.
【図２】実施例１、比較例のライニング材の引張強さ及
びシリンダ母材の降伏点応力を示す図である。FIG. 2 is a diagram showing the tensile strength of the lining materials of Example 1 and a comparative example and the yield point stress of the cylinder base material.
【図３】実施例１、比較例の耐圧強度を示す図である。FIG. 3 is a diagram showing pressure resistance strengths of Example 1 and a comparative example.
【図４】実施例１、実施例３、比較例の摩耗量の相対値
を示す図である。FIG. 4 is a diagram showing relative values of wear amounts of Example 1, Example 3, and Comparative Example.
【図５】実施例１、比較例の腐食減量率の相対値を示す
図である。FIG. 5 is a diagram showing relative values of corrosion weight loss rates of Example 1 and a comparative example.
【図６】実施例１のシリンダライニング材の金属組織を
示す顕微鏡写真である。FIG. 6 is a micrograph showing the metal structure of the cylinder lining material of Example 1.
【図７】実施例１のシリンダ母材の金属組織を示す顕微
鏡写真である。7 is a micrograph showing the metal structure of the cylinder base material of Example 1. FIG.
【図８】比較例のシリンダ母材の金属組織を示す顕微鏡
写真である。FIG. 8 is a micrograph showing a metal structure of a cylinder base material of a comparative example.
【図９】成形機用シリンダの一例を示す概略断面図であ
る。FIG. 9 is a schematic cross-sectional view showing an example of a molding machine cylinder.
１ 成形機用シリンダ、 ２ シリンダ母材、 ３ ラ
イニング材、４ 補強部材1 molding machine cylinder, 2 cylinder base material, 3 lining material, 4 reinforcing member
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) C22C 1/00 - 49/14 B29C 45/62 B29C 47/66 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) C22C 1/00-49/14 B29C 45/62 B29C 47/66
Claims (9)
母材と、前記シリンダ母材の内面に遠心鋳造によって形
成された耐摩耗性及び耐食性に優れたライニング材とを
有する成形機用シリンダにおいて、前記ライニング材
は、Ｃｒ ５.０〜２０.０重量％、Ｂ １.５〜４.０重量
％、Ｃ ０.７重量％以下、Ｓｉ １.０〜４.０重量％、
Ｍｎ ２.０重量％以下、Ｆｅ ５.０〜２０.０重量％、
Ｃｕ ５.０〜２０.０重量％、Ｗ ３.０〜１５.０重量
％、Ｃｏ ３.０〜２０.０重量％、Ｍｏ ２.０〜１２.０
重量％、残部実質的にＮｉ及び不可避的不純物のＮｉ基
合金からなることを特徴とする成形機用シリンダ。1. A hollow cylinder-shaped cylinder base material made of alloy steel, and an inner surface of the cylinder base material formed by centrifugal casting.
In a cylinder for a molding machine having a lining material formed of excellent wear resistance and corrosion resistance, the lining material is Cr 5.0 to 20.0% by weight, B 1.5 to 4.0% by weight, and C. 0.7 wt% or less, Si 1.0-4.0 wt%,
Mn 2.0 wt% or less, Fe 5.0 to 20.0 wt%,
Cu 5.0-20.0% by weight, W 3.0-15.0% by weight, Co 3.0-20.0% by weight, Mo 2.0-12.0.
A cylinder for a molding machine, characterized in that the balance is made of a Ni-based alloy containing, by weight, the balance substantially Ni and inevitable impurities.
いて、前記シリンダ母材の組織は、ベイナイト２０％以
上、残部ソルバイトからなることを特徴とする成形機用
シリンダ。2. The cylinder for a molding machine according to claim 1, wherein the structure of the cylinder base material is composed of 20% or more of bainite and the balance sorbite.
シリンダにおいて、前記ライニング材は、Ｃｒ ５.０〜
２０.０重量％、Ｂ １.５〜４.０重量％、Ｃ ０.７重量
％以下、Ｓｉ １.０〜４.０重量％、Ｍｎ ２.０重量％
以下、Ｆｅ ５.０〜２０.０重量％、Ｃｕ５.０〜２０.
０重量％、Ｗ ３.０〜１５.０重量％、Ｃｏ ３.０〜２
０.０重量％、Ｍｏ ２.０〜１２.０重量％、残部実質的
にＮｉ及び不可避的不純物からなるＮｉ基合金１００重
量部当り３.０〜２０.０重量部のＮｂＣを分散させてな
ることを特徴とする成形機用シリンダ。3. The cylinder for a molding machine according to claim 1 or 2, wherein the lining material is Cr 5.0 to 5.0.
20.0% by weight, B 1.5-4.0% by weight, C 0.7% by weight or less, Si 1.0-4.0% by weight, Mn 2.0% by weight
Below, Fe 5.0 to 20.0 wt%, Cu 5.0 to 20.
0% by weight, W 3.0 to 15.0% by weight, Co 3.0 to 2
Disperse 3.0 to 20.0 parts by weight of NbC per 100 parts by weight of a Ni-based alloy consisting of 0.0% by weight, Mo 2.0 to 12.0% by weight, and the balance substantially Ni and inevitable impurities. A cylinder for a molding machine, which is characterized by:
機用シリンダにおいて、前記ライニング材のＣｕが８.
０〜１５.０重量％であることを特徴とする成形機用シ
リンダ。4. The molding machine cylinder according to claim 1, wherein the lining material contains Cu of 8.
A cylinder for a molding machine, characterized in that the content is 0 to 15.0% by weight.
機用シリンダにおいて、Ｗ ５.０〜１０.０重量％であ
ることを特徴とする成形機用シリンダ。5. The cylinder for a molding machine according to any one of claims 1 to 4, wherein W is 5.0 to 10.0% by weight.
機用シリンダにおいて、前記シリンダ母材を形成する合
金鋼が、Ｃ ０.３〜０.５重量％、Ｓｉ ０.１５〜０.３
５重量％、Ｍｎ ０.３〜１.５重量％、Ｐ ０.０３重量
％以下、Ｓ ０.０３重量％以下、Ｃｒ ０.７〜１.５重
量％、Ｍｏ ０.１〜０.５重量％、残部実質的にＦｅ及
び不可避的不純物からなるＣｒ−Ｍｏ鋼であることを特
徴とする成形機用シリンダ。6. The cylinder for a molding machine according to claim 1, wherein the alloy steel forming the cylinder base material is C 0.3 to 0.5% by weight, and Si 0.15 to 0. .3
5% by weight, Mn 0.3 to 1.5% by weight, P 0.03% by weight or less, S 0.03% by weight or less, Cr 0.7 to 1.5% by weight, Mo 0.1 to 0.5% by weight. A cylinder for a molding machine, characterized in that it is a Cr-Mo steel consisting of wt%, the balance being substantially Fe and inevitable impurities.
機用シリンダにおいて、前記シリンダ母材を形成する合
金鋼が、Ｃ ０.３〜０.５重量％、Ｓｉ ０.１５〜０.３
５重量％、Ｍｎ ０.３〜１.５重量％、Ｐ ０.０３重量
％以下、Ｓ ０.０３重量％以下、Ｎｉ ３.０重量％以
下、Ｃｒ ０.７〜１.５重量％、Ｍｏ ０.１〜０.５重量
％、残部実質的にＦｅ及び不可避的不純物からなるＮｉ
−Ｃｒ−Ｍｏ鋼であることを特徴とする成形機用シリン
ダ。7. The cylinder for a molding machine according to claim 1, wherein the alloy steel forming the cylinder base material is C 0.3 to 0.5% by weight and Si 0.15 to 0. .3
5 wt%, Mn 0.3 to 1.5 wt%, P 0.03 wt% or less, S 0.03 wt% or less, Ni 3.0 wt% or less, Cr 0.7 to 1.5 wt%, Mo 0.1-0.5% by weight, balance Ni consisting essentially of Fe and unavoidable impurities
A cylinder for a molding machine, which is a Cr-Mo steel.
機用シリンダの製造方法において、ライニング材をシリ
ンダ母材内に入れて遠心鋳造後、２０〜２００℃／分の
冷却速度でベイナイト変態を起こす温度領域まで冷却
し、そこで１０分以上保持後、１〜１０℃／分の加熱速
度で、５５０〜６５０℃のアニール温度まで加熱し、ア
ニール後室温まで冷却することを特徴とする方法。8. The method of manufacturing a cylinder for a molding machine according to claim 2, wherein the lining material is put into the cylinder base material and centrifugally cast, and then bainite is cooled at a cooling rate of 20 to 200 ° C./min. A method characterized by cooling to a temperature region where transformation occurs, holding there for 10 minutes or more, then heating to an annealing temperature of 550 to 650 ° C. at a heating rate of 1 to 10 ° C./minute, and cooling to room temperature after annealing. .
造方法において、前記ベイナイト変態を起こす領域が３
００〜６００℃であることを特徴とする方法。9. The method for manufacturing a cylinder for a molding machine according to claim 8, wherein the region in which the bainite transformation occurs is 3
The method is characterized in that the temperature is from 00 to 600 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24125993A JP3531752B2 (en) | 1993-09-28 | 1993-09-28 | Molding machine cylinder and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24125993A JP3531752B2 (en) | 1993-09-28 | 1993-09-28 | Molding machine cylinder and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0790437A JPH0790437A (en) | 1995-04-04 |
| JP3531752B2 true JP3531752B2 (en) | 2004-05-31 |
Family
ID=17071589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24125993A Expired - Lifetime JP3531752B2 (en) | 1993-09-28 | 1993-09-28 | Molding machine cylinder and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3531752B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3373076B2 (en) * | 1995-02-17 | 2003-02-04 | トヨタ自動車株式会社 | Wear-resistant Cu-based alloy |
| ES2213788T3 (en) * | 1996-06-25 | 2004-09-01 | Mec Holding Gmbh | MATERIAL IN THE FORM OF POWDER OR WIRE FOR COATING, AS WELL AS CORRESPONDING PROCEDURE. |
| JP2001200931A (en) * | 1999-11-30 | 2001-07-27 | Tony U Otani | Heating cylinder for plastic molding with composite alloy sleeve |
| JP4749554B2 (en) * | 2001-01-19 | 2011-08-17 | 東芝機械株式会社 | Wear resistant high toughness alloy, composite material using the same, and mechanical member |
| CN103429773B (en) | 2011-11-28 | 2016-08-10 | 福田金属箔粉工业株式会社 | It is plated with the engine valve of Ni-Fe-Cr system alloy |
-
1993
- 1993-09-28 JP JP24125993A patent/JP3531752B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0790437A (en) | 1995-04-04 |
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