KR20020096279A - an aluminum alloy - Google Patents
an aluminum alloy Download PDFInfo
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- KR20020096279A KR20020096279A KR1020010034636A KR20010034636A KR20020096279A KR 20020096279 A KR20020096279 A KR 20020096279A KR 1020010034636 A KR1020010034636 A KR 1020010034636A KR 20010034636 A KR20010034636 A KR 20010034636A KR 20020096279 A KR20020096279 A KR 20020096279A
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- South Korea
- Prior art keywords
- aluminum alloy
- silicon
- magnesium
- copper
- nickel
- Prior art date
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- 229910000838 Al alloy Inorganic materials 0.000 title abstract description 21
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000010949 copper Substances 0.000 claims abstract description 11
- 239000011777 magnesium Substances 0.000 claims abstract description 11
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 9
- 239000010703 silicon Substances 0.000 claims abstract description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052802 copper Inorganic materials 0.000 claims abstract description 8
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 7
- 239000010936 titanium Substances 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 4
- 239000013078 crystal Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 8
- 239000011572 manganese Substances 0.000 abstract description 8
- 210000001787 dendrite Anatomy 0.000 abstract description 7
- 239000000203 mixture Substances 0.000 abstract description 7
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052748 manganese Inorganic materials 0.000 abstract description 5
- 238000007711 solidification Methods 0.000 abstract description 3
- 230000008023 solidification Effects 0.000 abstract description 3
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 abstract description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 2
- 239000011651 chromium Substances 0.000 abstract 2
- 229910052804 chromium Inorganic materials 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000005266 casting Methods 0.000 description 4
- 238000000879 optical micrograph Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000003303 reheating Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000005496 eutectics Effects 0.000 description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000010099 solid forming Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Conductive Materials (AREA)
Abstract
본 발명은 알루미늄 합금에 관한 것으로, 실리콘(Si), 구리(Cu), 망간(Mn), 마그네슘(Mg), 아연(Zn), 철(Fe), 크롬(Cr), 티타늄(Ti), 니켈(Ni) 등의 조성물이 첨가된 알루미늄 합금에 있어서, 상기 실리콘, 구리, 망간의 양을 현저히 줄이고, 대신 마그네슘, 철 및 니켈의 함량을 증가시켜 반응고 상태에서 수지상정(dendrite)이 구상화되고 내부에 용융금속이 포집되지 않으며, 입계에 유효 용융액의 양이 증가토록 함으로써 틱소포밍(thixoforming)과 같은 반응고 가공시 성형성이 향상되도록 된 것이다.The present invention relates to an aluminum alloy, silicon (Si), copper (Cu), manganese (Mn), magnesium (Mg), zinc (Zn), iron (Fe), chromium (Cr), titanium (Ti), nickel In an aluminum alloy to which a composition such as (Ni) is added, the amount of silicon, copper, and manganese is significantly reduced, and instead, the content of magnesium, iron, and nickel is increased, so that dendrite is spheroidized in the reaction state and internally. In the molten metal is not collected, and the amount of the effective melt at the grain boundary is increased to improve the formability during reaction solidification such as thixoforming.
Description
본 발명은 알루미늄 합금에 관한 것으로, 특히 반응고 가공시 성형성이 향상되도록 된 알루미늄 합금에 관한 것이다.The present invention relates to an aluminum alloy, and more particularly to an aluminum alloy to improve formability during reaction hardening.
주지된 바와 같이 알루미늄은 지각 중에 약 8% 존재하며 실리콘 다음으로 많은 원소로서, 가볍고 내식성·가공성과 전기 및 열의 전도도가 우수하여 철강을 제외하고는 가장 많이 사용되는 금속이다.As is well known, aluminum is about 8% in the earth's crust and is the second most abundant element after silicon.
또한, 알루미늄에 구리, 마그네슘, 실리콘, 아연, 망간, 니켈 등의 원소를 첨가하면 기계적 성질이 우수해지므로 합금으로 제조하여 각 방면에 널리 쓰이고 있다.In addition, the addition of elements such as copper, magnesium, silicon, zinc, manganese, nickel to aluminum is excellent in mechanical properties and is widely used in each aspect by making an alloy.
한편, 알루미늄 합금 주물은 철강 주물에 비하여 월등히 가벼우므로 자동차를 비롯하여 산업기계, 전기기기, 통신기기, 일용품, 정밀기기 등에 널리 사용되며, 보통 사형, 쉘모울드, 금형주물로서 사용되고 있다.On the other hand, aluminum alloy castings are much lighter than steel castings, so they are widely used in automobiles, industrial machinery, electrical equipment, communication equipment, daily necessities, precision instruments, etc., and are commonly used as sand molds, shell molds, and mold castings.
한편, 주조 이외에도 반응고 성형, 예를 들어 틱소포밍(thixoforming ; 금형 속에 반용융 상태의 금속을 넣고 고압을 가하여 응고시켜 구하고자 하는 형상을 얻는 가압응고성형법)의 재료로서도 많이 사용되는데, 종래 틱소포밍에 사용되는 알루미늄 합금의 조성예는 다음과 같다.On the other hand, in addition to casting, it is also widely used as a material for reaction solidification, for example, thixoforming (pressure solidification molding method in which a semi-molten metal is put into a mold and solidified by applying a high pressure). The compositional example of the aluminum alloy used for is as follows.
한편, 상기 알루미늄 합금은 도 1에 나타난 바와 같이, 수지상정(樹枝狀晶)의 가지가 차지하는 공간의 크기(dendrite arm spacing)가 32㎛ 이고, 입계크기(grain size)는 114㎛이며, 수지상정의 사이에 공정조직(eutectic structure)이 없는 조직을 갖는다.Meanwhile, as shown in FIG. 1, the aluminum alloy has a dendrite arm spacing of 32 μm, a grain size of 114 μm, and a dendrite arm spacing. It has a tissue with no eutectic structure in between.
그런데, 상기 알루미늄 합금은 압축 변형시험을 실시할 때 도 2(사진은 610℃에서 20분간 가열, 고상율 0.70인 상태)에 나타난 바와 같이, 수지상정들이 여전히 서로 맞물려 있는 정도가 심하고(mechanical interlocking state), 다량의 용융금속이 고체상태의 결정립 안에 포함되어 있음으로써 입계의 유효 용융액 양이 감소하여 도 3에 도시된 바와 같이 진변형률(true strain)이 매우 낮아 성형성이 떨어지는 문제점이 있었다.However, when the aluminum alloy is subjected to a compressive deformation test, as shown in FIG. ), Since a large amount of molten metal is included in the grains of the solid state, the amount of effective melt at the grain boundary decreases, and as shown in FIG. 3, the true strain is very low, resulting in poor moldability.
이에 본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로, 틱소포밍과 같은 반응고가공(semi-solid forming)시 성형성이 향상된 알루미늄 합금을 제공함에 그 목적이 있다.Accordingly, the present invention has been made to solve the above problems, an object of the present invention is to provide an aluminum alloy with improved formability during semi-solid forming, such as thixoforming.
도 1은 종래 알루미늄 합금의 광학 현미경 사진,1 is an optical micrograph of a conventional aluminum alloy,
도 2는 종래 알루미늄 합금을 재가열 했을 때의 광학 현미경 사진,2 is an optical micrograph when reheating a conventional aluminum alloy,
도 3은 종래 알루미늄 합금의 압축 변형시 진변형률-시간 선도,3 is a true strain-time diagram in the compression deformation of the conventional aluminum alloy,
도 4는 본 발명에 따른 알루미늄 합금의 광학 현미경 사진,4 is an optical micrograph of an aluminum alloy according to the present invention,
도 5는 본 발명에 따른 알루미늄 합금을 재가열 했을 때의 광학 현미경 사진,5 is an optical micrograph when reheating the aluminum alloy according to the present invention,
도 6은 본 발명에 따른 알루미늄 합금의 압축 변형시 진변형률-시간 선도이다.6 is a true strain-time plot of the compressive deformation of an aluminum alloy according to the present invention.
상기와 같은 목적을 달성하기 위한 본 발명은, 종래의 알루미늄 합금에서 실리콘, 구리, 망간의 양을 현저히 줄이고, 대신 마그네슘과 철의 함량을 늘리고 니켈을 추가 함유시키는 조성으로 이루어진다.The present invention for achieving the above object, in the conventional aluminum alloy significantly reduces the amount of silicon, copper, manganese, instead of increasing the content of magnesium and iron and made of a composition that further contains nickel.
따라서, 반응고 상태에서 수지상정의 구상화가 이루어지고, 입계의 유효용융액의 양이 증가하여 성형성이 향상된다.Therefore, spheroidization of the dendrite is achieved in the reaction solid state, and the amount of the effective melt at the grain boundary is increased to improve the moldability.
이하, 본 발명을 첨부된 예시도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.
본 발명에 따른 알루미늄 합금은 종래의 성분에서 실리콘, 구리, 망간의 함량을 대폭 줄이고, 대신 마그네슘, 철, 니켈의 함량을 증가시킨 조성으로 이루어진다.The aluminum alloy according to the present invention has a composition which greatly reduces the content of silicon, copper, and manganese in the conventional components, and instead increases the content of magnesium, iron, and nickel.
조성물의 자세한 함량은 아래의 표와 같다.Detailed contents of the composition are shown in the table below.
상기와 같은 조성을 갖는 본 발명 알루미늄 합금은 도 4에 나타난 바와 같이, 수지상정(樹枝狀晶)의 가지가 차지하는 공간의 크기(dendrite arm spacing)가 21㎛ 이고, 입계크기(grain size)는 85㎛이며, 수지상정의 사이에 공정조직(eutectic structure)이 약 20 % 존재하는 조직을 갖는다.As shown in FIG. 4, the aluminum alloy of the present invention having the composition as described above has a dendrite arm spacing of 21 μm and a grain size of 85 μm. It has a structure in which about 20% of the eutectic structure is present between dendrites.
이 알루미늄 합금은 압축 변형시험을 실시할 때 도 5(사진은 590℃에서 20분간 가열, 고상율 0.95인 상태)에 나타난 바와 같이, 수지상정들이 구상화되어 있고, 고체상태의 결정립 내에 용융금속이 포집되어 있지 않음으로써 입계의 유효 용융액 양이 증가하여 압력을 가했을 때 주형의 형상대로 변형되어 원하는 형상으로 가공되기 좋은 상태가 된다.When the aluminum alloy is subjected to a compression deformation test, as shown in Fig. 5 (photo is heated at 590 ° C. for 20 minutes and has a solid phase rate of 0.95), the dendritic crystals are spherical, and molten metal is collected in the solid crystal grains. If it is not, the amount of effective melt at the grain boundary increases, and when it is pressurized, it is deformed into the shape of the mold and is in a good state of being processed into a desired shape.
즉, 도 6에 나타난 바와 같이 진변형률(true strain)이 향상되어 성형성이 우수해진다.That is, as shown in Figure 6 true strain (true strain) is improved to be excellent in moldability.
이상 설명한 바와 같이 본 발명 알루미늄 합금은 반응고 가공시 성형성이 향상되어 재료를 원하는 형상으로 가공해내기가 용이하고, 또한 재료를 상대적으로 낮은 온도에서 가공할 수 있으므로 에너지가 절약되는 효과가 있다.As described above, the aluminum alloy of the present invention has the effect of saving energy because the moldability of the present invention is improved, so that the material can be easily processed into a desired shape, and the material can be processed at a relatively low temperature.
또한, 재가열시 수지상정의 구상화율이 높고 유효용융액을 입계에 많이 증가시키므로 주형에 충진시 충진저항이 작으므로 품질안정화에 도움이 되는 장점이 있다.In addition, since the spheroidization rate of the dendrite is high when reheating and the effective melt is increased at the grain boundary, the filling resistance is small when the mold is filled, which is helpful in stabilizing the quality.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020010034636A KR20020096279A (en) | 2001-06-19 | 2001-06-19 | an aluminum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020010034636A KR20020096279A (en) | 2001-06-19 | 2001-06-19 | an aluminum alloy |
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| KR20020096279A true KR20020096279A (en) | 2002-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020010034636A KR20020096279A (en) | 2001-06-19 | 2001-06-19 | an aluminum alloy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013165069A1 (en) * | 2012-05-03 | 2013-11-07 | (주)레오포즈 | Aluminum alloy for semi-solid forging |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5846350A (en) * | 1995-04-14 | 1998-12-08 | Northwest Aluminum Company | Casting thermal transforming and semi-solid forming aluminum alloys |
| US5879478A (en) * | 1996-03-20 | 1999-03-09 | Aluminium Pechiney | Process for semi-solid forming of thixotropic aluminum-silicon-copper alloy |
| US5911843A (en) * | 1995-04-14 | 1999-06-15 | Northwest Aluminum Company | Casting, thermal transforming and semi-solid forming aluminum alloys |
| US5968292A (en) * | 1995-04-14 | 1999-10-19 | Northwest Aluminum | Casting thermal transforming and semi-solid forming aluminum alloys |
-
2001
- 2001-06-19 KR KR1020010034636A patent/KR20020096279A/en not_active Application Discontinuation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5846350A (en) * | 1995-04-14 | 1998-12-08 | Northwest Aluminum Company | Casting thermal transforming and semi-solid forming aluminum alloys |
| US5911843A (en) * | 1995-04-14 | 1999-06-15 | Northwest Aluminum Company | Casting, thermal transforming and semi-solid forming aluminum alloys |
| US5968292A (en) * | 1995-04-14 | 1999-10-19 | Northwest Aluminum | Casting thermal transforming and semi-solid forming aluminum alloys |
| US5879478A (en) * | 1996-03-20 | 1999-03-09 | Aluminium Pechiney | Process for semi-solid forming of thixotropic aluminum-silicon-copper alloy |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013165069A1 (en) * | 2012-05-03 | 2013-11-07 | (주)레오포즈 | Aluminum alloy for semi-solid forging |
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