发明名称 |
Aluminum alloy material for forging |
摘要 |
An aluminum alloy forging material of the present invention is constituted by an aluminum alloy cast product obtained by subjecting an aluminum alloy ingot having a structure in which a secondary dentrite arm spacing (DAS) is 40 μm or less and an average grain diameter of crystallized substances is 8 μm or less to homogenization treatment for holding the ingot for one hour or more under temperature conditions of 450 to 510° C., wherein the ingot is obtained by continuously casting a molten aluminum alloy having an alloy composition consisting of: Si: 0.80 to 1.15 mass %; Fe: 0.2 to 0.5 mass %; Cu: 3.8 to 5 mass %; Mn: 0.8 to 1.15 mass %; Mg: 0.5 to 0.8 mass %; Zr: 0.05 to 0.13 mass %; and Ti contained in such an amount that a sum of Ti and Zr is 0.2 mass % or less, and the balance being Al and inevitable impurities, wherein the alloy composition satisfies a Cu/Mg ratio of 8 or less, Ti is added in a form of an Al master alloy (5Ti-1B mother alloy) in which Ti and B are contained at a ratio of 5:1, and a Ti/Zr ratio satisfies 0.3 or higher. |
申请公布号 |
US9039850(B2) |
申请公布日期 |
2015.05.26 |
申请号 |
US200812809130 |
申请日期 |
2008.12.12 |
申请人 |
Showa Denko K.K. |
发明人 |
Takemura Hideki |
分类号 |
C22F1/057;B21J5/00;B21K1/76;C22C21/14;C22C21/16 |
主分类号 |
C22F1/057 |
代理机构 |
Keating & Bennett, LLP |
代理人 |
Keating & Bennett, LLP |
主权项 |
1. A method of manufacturing an aluminum alloy forging material, comprising:
obtaining an aluminum alloy ingot having a structure in which a secondary dentrite arm spacing (DAS) is 40 μm or less and an average grain diameter of crystallized substances is 8 μm or less by continuously casting a molten aluminum alloy having an aluminum composition consisting of: Si: 0.80 to 1.15 mass %; Fe: 0.2 to 0.5 mass %; Cu: 3.8 to 5 mass %; Mn: 0.8 to 1.15 mass %; Mg: 0.5 to 0.8 mass %; Zr: 0.05 to 0.13 mass %; and Ti contained in such an amount that a sum of Ti and Zr is 0.2 mass % or less, and the balance being Al and inevitable impurities, wherein the alloy composition satisfies a Cu/Mg ratio of 8 or less, Ti is added in a form of a 5Ti-1B mother alloy, and Ti/Zr ratio satisfies 0.3 or higher; obtaining an aluminum alloy cast product by subjecting the aluminum alloy ingot to homogenization treatment for holding the product for one hour or more at temperatures of 450 to 510° C., hot forging the aluminum alloy cast product under temperature conditions of 400 to 510° C., subjecting the aluminum alloy cast product to a solution treatment under temperature conditions of 450 to 510° C., and subjecting the aluminum alloy cast product to an aging treatment, wherein the aluminum alloy cast product is constituted as the aluminum alloy forging material. |
地址 |
Tokyo JP |