US20010031218A1 - Highly heat-conductive alloy for pressure casting and cast alloy thereof - Google Patents
Highly heat-conductive alloy for pressure casting and cast alloy thereof Download PDFInfo
- Publication number
- US20010031218A1 US20010031218A1 US09/782,288 US78228801A US2001031218A1 US 20010031218 A1 US20010031218 A1 US 20010031218A1 US 78228801 A US78228801 A US 78228801A US 2001031218 A1 US2001031218 A1 US 2001031218A1
- Authority
- US
- United States
- Prior art keywords
- amount
- alloy
- less
- heat conductivity
- heat
- 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.)
- Abandoned
Links
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 22
- 239000000956 alloy Substances 0.000 title claims abstract description 22
- 238000005266 casting Methods 0.000 title claims abstract description 14
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 13
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 5
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 4
- 229910052745 lead Inorganic materials 0.000 claims abstract description 4
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 4
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 4
- 229910052718 tin Inorganic materials 0.000 claims abstract description 4
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 239000012535 impurity Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 235000012438 extruded product Nutrition 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 101100162020 Mesorhizobium japonicum (strain LMG 29417 / CECT 9101 / MAFF 303099) adc3 gene Proteins 0.000 description 1
- 101100434411 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) ADH1 gene Proteins 0.000 description 1
- 101150102866 adc1 gene Proteins 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
Images
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
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
Definitions
- the present invention relates to an aluminum alloy and a casting alloy thereof which are best-suited for materials of members required to have heat-dissipating characteristics, such as cabinets for accommodating electronic components, a heat-receiving block and a heat sink, for use in computers, electronic apparatus and the like.
- Conventional heat-dissipating members of this type for example, a heat-dissipating member having a multiplicity of fins on one side or opposite sides thereof, generally comprise an extruded product of highly heat-conductive pure aluminum or a malleable aluminum alloy, which, however, exhibit very poor castability. Users cut such an extruded product to a desired size and machine a portion of the extruded product on which an electronic component is to be mounted. Such machining becomes costly when massive amounts of extruded products are machined, thus resulting in a problem of increased costs as a whole.
- a second object of the present invention is to provide a cast aluminum alloy obtained from the above alloy.
- a highly heat-conductive alloy for pressure casting comprising Cu in an amount of 0.10% or less, Si in an amount of 5% to 16%, Mg in an amount of 0.20% or less, Zn in an amount of 0.10% or less, Fe in an amount of 0.20% to 1.0%, Mn in an amount of 0.20% or less, Ni in an amount of 0.05% or less, Ti in an amount of 0.05% or less, Pb in an amount of 0.06% or less, Sn in an amount of 0.05% or less, Cr in an amount of 0.10%, and Al forming the balance.
- the aluminum alloy for pressure casting according to the present invention is excellent in heat conductivity as well as in castability and seizure proofness and hence is useful as a material for heat-dissipating members.
- Al, Si and Fe are principal components, while other components are impurities. Since the heat conductivity of the alloy lowers as the amounts of impurities increase, lower contents of impurities are more desirable. However, the contents of impurities are determined taking the balance with costs into consideration.
- the alloy having the principal components in respective amounts as specified above meets the requirements as to castability, seizure proofness and heat conductivity.
- FIG. 1 is a graph showing the relationship between the heat conductivity and the Si content in an example of the invention and a comparative example;
- FIG. 2 is a graph showing the relationship between the heat conductivity and the Mn content in an example of the invention and a comparative example
- FIG. 3 is a graph showing the relationship between the heat conductivity and the Mg content in an example of the invention and a comparative example.
- Table 2 shows the chemical composition and the heat conductivity of each of examples 1 to 6 (samples Nos. 12 to 15, 25 and diecast product) within the scope of the present invention and each of comparative examples 1 to 14 (samples Nos. 1 to 8 and 16 to 21).
- the diecast product was obtained by diecasting an aluminum alloy having a chemical composition within the scope of the invention, and the data of the diecast product in Table 2 was obtained by analyzing the chemical composition of the diecast product thus obtained.
- the aluminum alloy of the present invention even when diecast, exhibited a heat conductivity higher than the target heat conductivity (150 W/(m ⁇ ° C.)).
- sample Nos. 1 to 8 correspond to comparative examples 1 to 8, respectively, samples Nos. 12 to 15 correspond to examples 1 to 4, respectively, samples Nos. 16 to 21 correspond to comparative examples 9 to 14, respectively, and sample No. 25 and diecast product correspond to examples 5 and 6, respectively.
- the alloy for pressure casting according to the present invention is required to have superior castability, seizure proofness and heat conductivity.
- Pure aluminum (comparative example 1) exhibits a heat conductivity of 252 W/(m ⁇ ° C.), which is the highest. This value decreases when an additional element is incorporated in aluminum.
- FIG. 1 is a graph showing the relationship between the content of Si and the heat conductivity. As shown, the heat conductivity steeply drops until the Si content reaches about 1%, and then gradually lowers until the Si content reaches about 7%. When the Si content is between 5% and 16%, substantially the same level of heat conductivity, or 170 W/(m ⁇ ° C.) or higher, is maintained. Therefore, this range of Si content satisfies the requirement as to heat conductivity.
- Si is an additive that contributes to an improvement in the castability of an alloy, and an alloy for pressure casting, in general, is required to contain Si in an amount of 5% or more so as to exhibit an improved castability. It is known that the fluidity of an alloy becomes maximum when the Si content is about 15%, and therefore, the castability of the alloy lowers when the Si content is 16% or more. Accordingly, an optimum Si content is between 5% and 16% when the castability and the heat conductivity are taken into consideration.
- Si content is between 11% and 14%.
- the alloy for pressure casting according to the present invention is also required to have a seizure proofness, which prevents a casting from seizing the mold to allow smooth release of the casting therefrom.
- Fe or Mn is known to be effective in imparting an alloy with such a seizure proofness. Since Fe impairs the heat conductivity less than Mn as seen from comparative examples 5 and 6, Fe is more preferable than Mn. According to examples 1 to 6, an adequate Fe content that satisfies the requirements of both the heat conductivity and the seizure proofness is 0.2 to 1.0%.
- the heat conductivity lowers to 146 W/(m ⁇ ° C.), which is lower than the target level, when the content of Mn reaches 0.22%.
- the Mn content in the alloy of the invention is required to be not more than 0.20%.
- the heat conductivity lowers to 146 W/(m ⁇ ° C.), which is lower than the target level as described above, when the content of Mg reaches 0.24%.
- the Mg content in the alloy of the invention is required to be not more than 0.20%.
- the alloy of the invention needs to permit inclusion of impurities to such an extent as not to impair the target heat conductivity.
- the alloy of the invention permits inclusion of Cu in an amount of not more than 0.1%, Zn in an amount of not more than 0.1%, Ti in an amount of not more than 0.05%, Pb in an amount of not more than 0.06%, Sn in an amount of not more than 0.05%, Cr in an amount of not more than 0.10%, and Ni in an amount of not more than 0.05 %.
- the alloy of the invention containing Al, Si and Fe and other impurities in respective amounts specified above satisfied the requirement of heat conductivity without impairment of the castability and seizure proofness that are required in diecasting.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
- Conductive Materials (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000057233 | 2000-03-02 | ||
| JP2000-57233 | 2000-03-02 | ||
| JP2000190655A JP4191370B2 (ja) | 2000-03-02 | 2000-06-26 | 高熱伝導加圧鋳造用合金と該合金鋳物 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US20010031218A1 true US20010031218A1 (en) | 2001-10-18 |
Family
ID=26586615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US09/782,288 Abandoned US20010031218A1 (en) | 2000-03-02 | 2001-02-14 | Highly heat-conductive alloy for pressure casting and cast alloy thereof |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20010031218A1 (ja) |
| EP (1) | EP1130125A3 (ja) |
| JP (1) | JP4191370B2 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170121793A1 (en) * | 2015-04-15 | 2017-05-04 | Daiki Aluminium Industry Co., Ltd. | Aluminum alloy for die casting, and aluminum alloy die cast produced using same |
| US9903007B2 (en) | 2012-09-25 | 2018-02-27 | Josho Gakuen Educational Foundation | Hypereutectic aluminum-silicon alloy die-cast member and process for producing same |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003089838A (ja) * | 2001-09-18 | 2003-03-28 | Toyota Industries Corp | アルミダイカスト製吸放熱部品 |
| EP2281909B1 (en) | 2004-04-05 | 2013-03-06 | Nippon Light Metal Company Ltd. | Manufacturing method of an aluminium alloy cast heat sink having a complex structure or a thin walled protion with excellent thermal conductivity |
| WO2008105066A1 (ja) | 2007-02-27 | 2008-09-04 | Nippon Light Metal Company, Ltd. | 熱伝導用途用アルミニウム合金材 |
| JP5304808B2 (ja) * | 2011-01-31 | 2013-10-02 | 株式会社デンソー | アルミニウム合金鋳物およびその製造方法 |
| JP5699774B2 (ja) * | 2011-04-20 | 2015-04-15 | トヨタ自動車株式会社 | アルミニウム合金材及びその製造方法 |
| KR101935243B1 (ko) * | 2014-10-23 | 2019-01-04 | 가부시키가이샤 다이키 알루미늄 코교쇼 | 다이캐스트용 알루미늄 합금 및 이것을 사용한 알루미늄 합금 다이캐스트 |
| KR101601551B1 (ko) | 2014-12-02 | 2016-03-09 | 현대자동차주식회사 | 알루미늄 합금 |
| US20180057913A1 (en) * | 2015-03-19 | 2018-03-01 | GM Global Technology Operations LLC | Alloy composition |
| KR101795260B1 (ko) * | 2016-05-24 | 2017-11-07 | 현대자동차주식회사 | 열전도도 및 주조성이 향상된 다이캐스팅용 알루미늄 합금을 이용한 배터리용 히트싱크 및 이의 제조방법 |
| US10927436B2 (en) | 2017-03-09 | 2021-02-23 | GM Global Technology Operations LLC | Aluminum alloys |
| CN109332631B (zh) * | 2018-11-02 | 2021-03-09 | 广东鸿图科技股份有限公司 | 一种通讯箱体低温压铸工艺 |
| CN110735071A (zh) * | 2019-11-21 | 2020-01-31 | 白福林 | 一种高导热铝合金及其制备方法 |
| CN110804708A (zh) * | 2019-12-09 | 2020-02-18 | 宁波市佳利来机械制造有限公司 | 一种高强度压铸铝合金、发动机壳体及其制造方法 |
| KR20210152776A (ko) * | 2020-06-09 | 2021-12-16 | ㈜에스엘엠글로벌 | 열전도율이 우수한 주조용 알루미늄 합금 |
| CN113005335A (zh) * | 2021-02-22 | 2021-06-22 | 李秋明 | 新型铝合金材料、薄壁件和金属手模 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3726672A (en) * | 1970-10-30 | 1973-04-10 | Reduction Co | Aluminum base alloy diecasting composition |
| FR2354171A1 (fr) * | 1976-06-09 | 1978-01-06 | Reynolds Metals Co | Composition de brasure pour le brasage de l'aluminium |
| US4489140A (en) * | 1982-06-24 | 1984-12-18 | Atlantic Richfield Company | Multi-layer aluminum alloy brazing sheet |
| JPS60206597A (ja) * | 1984-03-30 | 1985-10-18 | Sumitomo Precision Prod Co Ltd | アルミニウム合金ろう |
| EP0637481B1 (en) * | 1993-08-03 | 2001-09-12 | The Furukawa Electric Co., Ltd. | Aluminum alloy brazing material and brazing sheet for heat-exchangers and method for fabricating aluminum alloy heat-exchangers |
| US5837388A (en) * | 1995-08-07 | 1998-11-17 | The Furukawa Electric Co., Ltd. | Aluminum alloy solder material, its manufacturing method, brazing sheet using this material, and method of manufacturing aluminum alloy heat exchanger using this sheet |
| JP3332885B2 (ja) * | 1999-04-20 | 2002-10-07 | 古河電気工業株式会社 | セミソリッド加工用アルミニウム基合金及びその加工部材の製造方法 |
-
2000
- 2000-06-26 JP JP2000190655A patent/JP4191370B2/ja not_active Expired - Lifetime
-
2001
- 2001-02-14 US US09/782,288 patent/US20010031218A1/en not_active Abandoned
- 2001-02-19 EP EP01301441A patent/EP1130125A3/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9903007B2 (en) | 2012-09-25 | 2018-02-27 | Josho Gakuen Educational Foundation | Hypereutectic aluminum-silicon alloy die-cast member and process for producing same |
| US20170121793A1 (en) * | 2015-04-15 | 2017-05-04 | Daiki Aluminium Industry Co., Ltd. | Aluminum alloy for die casting, and aluminum alloy die cast produced using same |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1130125A3 (en) | 2001-09-19 |
| EP1130125A2 (en) | 2001-09-05 |
| JP2001316748A (ja) | 2001-11-16 |
| JP4191370B2 (ja) | 2008-12-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20010031218A1 (en) | Highly heat-conductive alloy for pressure casting and cast alloy thereof | |
| US6511555B2 (en) | Cylinder head and motor block castings | |
| EP0445684B1 (en) | High strength, heat resistant aluminum-based alloys | |
| JP3378342B2 (ja) | 耐摩耗性に優れたアルミニウム鋳造合金及びその製造方法 | |
| JP5301750B1 (ja) | ダイカスト用高熱伝導アルミニウム合金及びこれを用いたアルミニウム合金ダイカスト並びに該合金を用いたヒートシンク | |
| JP2002105571A (ja) | 熱伝導性に優れたヒートシンク用アルミニウム合金材 | |
| JP2005272868A (ja) | 高剛性・低線膨張率を有する鋳造用アルミニウム合金 | |
| JP4210020B2 (ja) | 熱伝導性に優れたヒートシンク用アルミニウム合金材 | |
| JP2001254135A (ja) | 電気伝導性および熱伝導性に優れたアルミニウム合金材 | |
| EP1229140B1 (en) | Aluminium alloy for high pressure die-casting | |
| JP2013075332A (ja) | 通信機用鋳造ケース及び通信機用鋳造ケースの製造方法 | |
| JP2005272869A (ja) | 耐摩耗性に優れたアルミニウム合金及び同合金を用いた摺動部材 | |
| US4025336A (en) | Aluminum bronze having a good wear resistance | |
| JP3772718B2 (ja) | 熱伝導性に優れた鋳物用アルミニウム合金 | |
| JP3636027B2 (ja) | 熱伝導性に優れたアルミニウム合金鋳物 | |
| JP2003119536A (ja) | 熱伝導性に優れた鋳物用アルミニウム合金 | |
| KR102672253B1 (ko) | 강도가 우수한 다이캐스팅용 알루미늄 합금 | |
| JP4562296B2 (ja) | 熱伝導性に優れたヒートシンク用アルミニウム合金材 | |
| JP2002226932A (ja) | 強度及び熱伝導性に優れたヒートシンク用アルミニウム合金材及びその製造法 | |
| JPH09324235A (ja) | ダイカスト用過共晶Ａｌ−Ｓｉ合金ならびに過共晶Ａｌ−Ｓｉ合金ダイカスト鋳物およびその製造方法およびその使用方法 | |
| JPH06145866A (ja) | 鋳造性に優れた高圧鋳造用アルミニウム合金 | |
| JP2003064439A (ja) | マグネシウム合金、並びに、これを用いて製造されるマグネシウム合金製筐体およびその製造方法 | |
| JPH06212334A (ja) | 薄肉鋳造用アルミニウム合金 | |
| CN85102201B (zh) | 亚共晶铝硅铜锌碲系压铸铝合金 | |
| JPS61136650A (ja) | 押出性、曲げ加工性の優れた中強度アルミニウム合金 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: K.K. DAIKI ALUMINIUM KOGYOSHO, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SUZUKI, TAKAO;KAWAI, KIYOFUMI;OSHIRO, NAOTO;REEL/FRAME:012078/0539 Effective date: 20000929 |
|
| STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |