JPH0633206A - Method for heat-treating ni-base alloy - Google Patents
Method for heat-treating ni-base alloyInfo
- Publication number
- JPH0633206A JPH0633206A JP18701292A JP18701292A JPH0633206A JP H0633206 A JPH0633206 A JP H0633206A JP 18701292 A JP18701292 A JP 18701292A JP 18701292 A JP18701292 A JP 18701292A JP H0633206 A JPH0633206 A JP H0633206A
- Authority
- JP
- Japan
- Prior art keywords
- treatment
- aging treatment
- aging
- time
- heat treatment
- 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.)
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Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、Ni基合金の熱処理方
法に関し、特に短時間の時効処理によって、所望の特性
を得ることができるNi基合金の時効処理方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat treatment method for Ni-base alloys, and more particularly to a aging treatment method for Ni-base alloys which can obtain desired characteristics by aging treatment for a short time.
【0002】[0002]
【従来の技術】Ni基合金であるインコネル718 (イン
コアロイス社の商品名)は、耐熱性、高強度の合金材料
として知られているが、所定の特性を得るためには、従
来、その時効処理は、AMS(Aerospace Material Spe
crfication)等で知られているように、長時間の処理を
行わなければならなかった。たとえば、720℃×8H
→炉冷→620℃×8H→空冷、の処理を要し、時効処
理に丸一日を費す必要があった。2. Description of the Related Art Inconel 718 (a trade name of Incoalloys), which is a Ni-based alloy, is known as a heat-resistant and high-strength alloy material. Processing is AMS (Aerospace Material Spe
It has been necessary to carry out a long-time process as is known from crfication). For example, 720 ℃ × 8H
→ Furnace cooling → 620 ° C × 8H → air cooling was required, and it was necessary to spend a whole day for the aging treatment.
【0003】[0003]
【発明が解決しようとする課題】しかし、このように長
時間の熱処理を施すことによって、特性が向上する点で
はよいが、製造コストの点からは、著しく不具合であ
る。However, although it is good that the characteristics are improved by performing the heat treatment for a long time in this way, it is a serious problem from the viewpoint of manufacturing cost.
【0004】従って、本発明は上記従来技術の問題点を
解決して、従来のものと同様の特性が得られ、かつ時効
処理に要する時間を著しく短縮化したNi基合金の熱処
理方法を提供することを目的とする。Therefore, the present invention solves the above-mentioned problems of the prior art and provides a heat treatment method for a Ni-base alloy, which has the same characteristics as those of the conventional art and which significantly shortens the time required for the aging treatment. The purpose is to
【0005】[0005]
【課題を解決するための手段】上記の課題を解決するた
めに、本発明のNi基合金の熱処理方法は、重量比で、
Ni:49〜58%、Cr:15〜22%、Nbおよび
/またはTa:4.5〜5.6%、Mo:2.5〜3.
5%、Al:0.1〜1.5%、Ti:0.5〜2.7
5%、および残部がFeからなるNi基合金の熱処理方
法であって、前記Ni基合金を950〜1100℃で固
溶化熱処理を施した後、720〜750℃で3〜8時間
の時効処理を施すことを特徴としている。In order to solve the above-mentioned problems, the heat treatment method for the Ni-based alloy of the present invention comprises:
Ni: 49-58%, Cr: 15-22%, Nb and / or Ta: 4.5-5.6%, Mo: 2.5-3.
5%, Al: 0.1 to 1.5%, Ti: 0.5 to 2.7
A method for heat treatment of a Ni-based alloy having 5% and the balance being Fe, wherein the Ni-based alloy is subjected to a solution heat treatment at 950 to 1100 ° C, and then an aging treatment at 720 to 750 ° C for 3 to 8 hours. It is characterized by giving.
【0006】発明の具体的説明 本発明において用いるNi基合金は、析出硬化型合金で
あり、その組成範囲を上記のように限定する理由は次の
通りである。以下、%は重量比を意味する。 Detailed Description of the Invention The Ni-based alloy used in the present invention is a precipitation hardening alloy, and the reason for limiting the composition range as described above is as follows. Hereinafter,% means a weight ratio.
【0007】Ti、Nbおよび/またはTa、およびA
lは、析出硬化に必要な成分であり、高温における高強
度を得るために、Ti:0.5〜2.75%、好ましく
は0.65〜1.15%、Nbおよび/またはTa:
4.5〜5.6%、好ましくは4.75〜5.5%、A
l:0.1〜1.5%、好ましくは0.2〜0.8%が
必要である。各成分とも含有量が少なすぎると、析出硬
化による十分な強度を得ることができず、一方、各成分
とも含有量が多すぎると、加工時の変形抵抗が大きくな
り過ぎて、加工性が悪くなる。Ti, Nb and / or Ta, and A
1 is a component necessary for precipitation hardening, and in order to obtain high strength at high temperature, Ti: 0.5 to 2.75%, preferably 0.65 to 1.15%, Nb and / or Ta:
4.5-5.6%, preferably 4.75-5.5%, A
1: 0.1 to 1.5%, preferably 0.2 to 0.8% is required. If the content of each component is too small, sufficient strength due to precipitation hardening cannot be obtained.On the other hand, if the content of each component is too large, the deformation resistance during processing becomes too large, resulting in poor workability. Become.
【0008】Crは、高温における耐酸化性を向上させ
るために添加する元素であり、15〜22%、好ましく
は17〜21%の含有量が必要である。含有量が15%
未満では、耐酸化性が悪く高温での使用時に材料の損失
を招く。一方、含有量が22%を越えると、加工性が悪
くなる。Cr is an element added to improve the oxidation resistance at high temperatures, and the content of Cr is required to be 15 to 22%, preferably 17 to 21%. Content is 15%
If it is less than the above range, the oxidation resistance is poor and the material is lost during use at high temperature. On the other hand, if the content exceeds 22%, workability deteriorates.
【0009】Moは、耐酸化性を向上させるために添加
する元素であり、その含有量は2.5〜3.5%、好ま
しくは2.8〜3.3%とする。その含有量が2.5%
未満では耐熱性を向上させる効果が小さく、一方、3.
5%を越えて添加すると、加工性、特に熱間加工性が悪
くなる。Niは本発明におけるNi基合金の主成分をな
すが、その含有量は49〜58%、好ましくは50〜5
5%とする。その含有量が49%未満では、耐酸化性が
悪くなり、58%を越えると延性が悪くなる。Mo is an element added to improve the oxidation resistance, and the content thereof is 2.5 to 3.5%, preferably 2.8 to 3.3%. Its content is 2.5%
If less than 3, the effect of improving heat resistance is small, while on the other hand, 3.
If added in excess of 5%, workability, especially hot workability, deteriorates. Ni is the main component of the Ni-based alloy in the present invention, but its content is 49 to 58%, preferably 50 to 5%.
5%. If the content is less than 49%, the oxidation resistance becomes poor, and if it exceeds 58%, the ductility becomes poor.
【0010】上記組成範囲のNi基合金の固溶化熱処理
温度は、950〜1100℃の範囲とする。処理温度が
950℃未満では、固溶が不十分であり、次いで行う時
効処理によって所定の特性(引張強度、硬さなど)が得
られない。一方、1100℃を越えると、結晶粒度が粗
大化し、粒界の脆弱化を招く。このため固溶化熱処理温
度は上記の範囲とする。The solution heat treatment temperature of the Ni-based alloy having the above composition range is in the range of 950 to 1100 ° C. If the treatment temperature is lower than 950 ° C., the solid solution is insufficient, and the predetermined properties (tensile strength, hardness, etc.) cannot be obtained by the subsequent aging treatment. On the other hand, if the temperature exceeds 1100 ° C., the crystal grain size becomes coarse and the grain boundary becomes brittle. Therefore, the solution heat treatment temperature is set within the above range.
【0011】時効処理温度は、720〜750℃の範囲
とする。720℃未満および750℃を越える処理温度
では、いずれも特性の向上が得られない。また、この温
度範囲での時効処理時間は、3〜8時間、好ましくは4
〜8時間の範囲とする。処理時間が3時間未満では、特
性の向上が得られず、一方、8時間を越えても特性は向
上していかない。The aging treatment temperature is in the range of 720 to 750 ° C. At processing temperatures below 720 ° C. and above 750 ° C., no improvement in properties can be obtained. The aging treatment time in this temperature range is 3 to 8 hours, preferably 4
~ 8 hours. If the treatment time is less than 3 hours, the characteristics cannot be improved. On the other hand, if the treatment time exceeds 8 hours, the characteristics are not improved.
【0012】このようにして製造したNi基合金材は、
高強度耐熱性材料として各種の用途、例えば、耐熱性バ
ネ材料、として好適に用いることができる。The Ni-based alloy material produced in this way is
It can be suitably used as a high-strength heat-resistant material for various applications, for example, a heat-resistant spring material.
【0013】[0013]
【実施例】表1に示す化学組成からなる合金材料を真空
誘導溶解により製造し、熱間加工なられた冷間加工を行
って、厚さ0.2mmの板材とした。Example An alloy material having the chemical composition shown in Table 1 was manufactured by vacuum induction melting and subjected to cold working, which was hot working, to obtain a plate material having a thickness of 0.2 mm.
【0014】 上記により製造した板材を1000℃の温度で固溶化熱
処理を施し、次いで、表2に示す条件で時効処理を行っ
た。[0014] The plate material manufactured as described above was subjected to solution heat treatment at a temperature of 1000 ° C., and then subjected to an aging treatment under the conditions shown in Table 2.
【0015】表2に示す条件で時効処理を行った試料に
ついて、引張試験、硬さ試験を行った結果を併せて表
2、さらに図1および図2に示す。表2には、各時効処
理条件における引張強さ(測定回数2回)、伸び(測定
回数2回)、硬さ(測定点6箇所)のデータを示した
が、伸びは、標点外破断のデータがほとんどであり信頼
性に欠けるため参考値とする。図1は、硬さに及ぼす時
効処理温度と時効処理時間の影響を示すグラフであり、
図2は、引張強さに及ぼす時効処理温度と時効処理時間
の影響を示すグラフである。The results of the tensile test and the hardness test of the samples which have been subjected to the aging treatment under the conditions shown in Table 2 are shown in Table 2 and also shown in FIGS. Table 2 shows data of tensile strength (measurement number: 2 times), elongation (measurement number: 2 times), hardness (measurement point: 6 points) under each aging treatment condition. Most of the data is not reliable and is used as a reference value. FIG. 1 is a graph showing the effects of aging temperature and aging time on hardness,
FIG. 2 is a graph showing the influence of the aging temperature and the aging time on the tensile strength.
【0016】 表2 引張試験、硬さ試験の結果 時効処理条件 引張強さ 伸び 硬さ (N/mm 2 ) (%) (Hv) 焼鈍上がり 837 (85.4) 29.4 216 217 216 839 (85.6) 28.1 215 214 215 600℃×4H 831 (84.7) 10.3 258 265 263 861 (87.8) 9.1 251 249 260 600℃×8H 828 (84.4) 8.6 291 285 284 940 (95.9) 14.6 266 264 264 650℃×4H 927 (94.5) 12.4 331 342 314 951 (97.0) 11.1 301 327 299 650℃×8H 1047 (106.8) 9.2 360 363 359 1004 (102.4) 8.4 347 356 358 700℃×4H 1034 (106.4) 7.1 404 395 406 1018 (103.8) 4.7 376 377 386 700℃×8H 1281 (130.6) 11.0 402 404 415 1178 (120.1) 5.3 392 401 398 720℃×2H 1189 (121.2) 15.5 390 385 360 1168 (119.1) 16.7 379 368 350 720℃×3H 1221 (124.5) 16.8 405 393 386 1229 (125.3) 23.3 399 417 394 720℃×4H 1326 (135.2) 19.7 426 423 435 1303 (132.9) 20.3 428 427 427 720℃×8H 1273 (129.8) 13.0 452 443 427 1285 (131.0) 20.2 463 446 450 750℃×2H 1224 (124.8) 8.5 413 410 416 1239 (126.3) 17.0 417 418 406 750℃×3H 1284 (130.9) 15.8 413 408 406 1300 (132.6) 14.6 418 418 433 750℃×4H 1262 (138.5) 10.6 439 433 424 1297 (137.7) 12.1 429 436 433 750℃×8H 1333 (137.1) 8.2 444 445 432 1304 (136.6) 9.6 424 427 420 770℃×4H 1199 (122.3) 10.6 394 397 414 1249 (127.4) 12.2 394 403 399 800℃×4H 1126 (114.8) 6.3 348 337 345 1131 (115.3) 5.8 354 351 348 800℃×8H 1120 (114.2) 9.1 367 346 353 1118 (114.0) 9.6 339 353 357 注1) 引張強さの( ) 内の数値はkgf/mm2 単位であ
る。Table 2 Results of tensile test and hardness test Aging treatment condition Tensile strength Elongation hardness (N / mm 2 ) (%) (Hv) Annealed 837 (85.4) 29.4 216 217 216 216 839 (85.6) 28.1 215 214 215 600 ° C × 4H 831 (84.7) 10.3 258 265 263 861 (87.8) 9.1 251 249 260 600 ° C × 8H 828 (84.4) 8.6 291 285 284 940 (95.9) 14.6 266 264 264 650 ° C × 4H 927 (94.5) 12.4 331 342 314 951 (97.0) 11.1 301 327 299 650 ° C × 8H 1047 (106.8) 9.2 360 363 359 1004 (102.4) 8.4 347 356 358 700 ° C x 4H 1034 (106.4) 7.1 404 395 406 1018 (103.8) 4.7 376 377 386 386 700 ° C x 8H 1281 (130.6) 11.0 402 404 415 1178 (120.1) 5.3 392 401 398 720 ℃ × 2H 1189 (121.2) 15.5 390 385 360 1168 (119.1) 16.7 379 368 350 720 ℃ × 3H 1221 (124.5) 16.8 405 393 386 1229 (125.3) 23.3 399 417 394 720 ℃ × 4H 1326 (135.2) 19.7 426 423 435 1303 (132.9) 20.3 428 427 427 720 ℃ 8H 1273 (129.8) 13.0 452 443 427 1285 (131.0) 20.2 463 446 450 750 ℃ × 2H 1224 (124.8) 8.5 413 410 416 1239 (126.3) 17.0 417 418 406 750 ° C x 3H 1284 (130.9) 15.8 413 408 406 1300 (132.6) 14.6 418 418 433 750 ° C × 4H 1262 (138.5) 10.6 439 433 424 1297 (137.7) 12.1 429 436 433 750 ° C × 8H 1333 (137.1) 8.2 444 445 432 1304 (136.6) 9.6 424 427 420 770 ° C x 4H 1199 (122.3) 10.6 394 397 414 1249 (127.4) 12.2 394 403 399 800 ° C x 4H 1126 (114.8) 6.3 348 337 345 1131 (115.3) 5.8 354 351 348 800 ° C x 8H 1120 (114.2) 9.1 367 346 353 1118 (114.0) 9.6 339 353 357 Note 1) The value in () of tensile strength is kgf / mm 2 unit.
【0017】表2、図1および図2から明らかなよう
に、時効処理条件を720〜750℃×3〜8Hとする
ことによって、高引張強さおよび高硬度を有する材料が
得られ、特性の良好なものが得られることが分かる。As is clear from Table 2, FIG. 1 and FIG. 2, by setting the aging treatment condition to 720 to 750 ° C. × 3 to 8H, a material having high tensile strength and high hardness can be obtained, It can be seen that a good product can be obtained.
【0018】[0018]
【発明の効果】本発明の熱処理方法によれば、従来材と
同様の特性を有しつつ、時効処理時間の大幅な短縮化を
図ることができるので、製造コストの大幅な削減が可能
となり、その工業的価値は大きい。EFFECTS OF THE INVENTION According to the heat treatment method of the present invention, the aging treatment time can be greatly shortened while having the same characteristics as the conventional material, so that the manufacturing cost can be greatly reduced. Its industrial value is great.
【図面の簡単な説明】[Brief description of drawings]
【図1】硬さに及ぼす時効処理温度と時効処理時間の影
響を示すグラフ。FIG. 1 is a graph showing the effects of aging temperature and aging time on hardness.
【図2】引張強さに及ぼす時効処理温度と時効処理時間
の影響を示すグラフ。FIG. 2 is a graph showing the effects of aging temperature and aging time on tensile strength.
Claims (1)
5〜22%、Nbおよび/またはTa:4.5〜5.6
%、Mo:2.5〜3.5%、Al:0.1〜1.5
%、Ti:0.5〜2.75%、および残部がFeから
なるNi基合金の熱処理方法であって、前記Ni基合金
を950〜1100℃で固溶化熱処理を施した後、72
0〜750℃において3〜8時間の時効処理を施すこと
を特徴とするNi基合金の熱処理方法。1. A weight ratio of Ni: 49 to 58% and Cr: 1
5 to 22%, Nb and / or Ta: 4.5 to 5.6
%, Mo: 2.5 to 3.5%, Al: 0.1 to 1.5
%, Ti: 0.5 to 2.75%, and the balance being Fe, which is a heat treatment method for a Ni-based alloy, wherein the Ni-based alloy is subjected to solution heat treatment at 950 to 1100 ° C., and then 72
A heat treatment method for a Ni-based alloy, which comprises performing an aging treatment at 0 to 750 ° C. for 3 to 8 hours.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18701292A JPH0633206A (en) | 1992-07-14 | 1992-07-14 | Method for heat-treating ni-base alloy |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18701292A JPH0633206A (en) | 1992-07-14 | 1992-07-14 | Method for heat-treating ni-base alloy |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0633206A true JPH0633206A (en) | 1994-02-08 |
Family
ID=16198661
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18701292A Pending JPH0633206A (en) | 1992-07-14 | 1992-07-14 | Method for heat-treating ni-base alloy |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0633206A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07331368A (en) * | 1994-06-09 | 1995-12-19 | Sumitomo Metal Ind Ltd | Age hardening nickel-base alloy material, excellent in strength and corrosion resistance, and its production |
JP2000192179A (en) * | 1998-12-23 | 2000-07-11 | United Technol Corp <Utc> | Die-cast member |
JP2018076571A (en) * | 2016-11-11 | 2018-05-17 | 大同特殊鋼株式会社 | Fe-Ni-BASED ALLOY AND MANUFACTURING METHOD THEREFOR |
CN108385045A (en) * | 2018-02-08 | 2018-08-10 | 中国科学院金属研究所 | The heat treatment method of δ phases is uniformly precipitated in a kind of control IN718 alloys |
-
1992
- 1992-07-14 JP JP18701292A patent/JPH0633206A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07331368A (en) * | 1994-06-09 | 1995-12-19 | Sumitomo Metal Ind Ltd | Age hardening nickel-base alloy material, excellent in strength and corrosion resistance, and its production |
JP2000192179A (en) * | 1998-12-23 | 2000-07-11 | United Technol Corp <Utc> | Die-cast member |
JP2018076571A (en) * | 2016-11-11 | 2018-05-17 | 大同特殊鋼株式会社 | Fe-Ni-BASED ALLOY AND MANUFACTURING METHOD THEREFOR |
CN108385045A (en) * | 2018-02-08 | 2018-08-10 | 中国科学院金属研究所 | The heat treatment method of δ phases is uniformly precipitated in a kind of control IN718 alloys |
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