发明名称 |
Pressure casting method of magnesium alloy and metal products thereof |
摘要 |
The present invention provides a pressure casting method of a magnesium alloy. In the method, a molten magnesium alloy is cooled to form a partially molten state containing a solid-phase, and the partially molten state is further cooled to form a solid-phase granularly crystallized solid material. The solid material is partially-melted and pressure cast into a mold by a molding machine. A ratio of primary crystals in said solid material is set to 55 to 65%. The solid material is partially-melted in a solid-phase and liquid-phase coexisting state at a selected heating temperature so that a semi-solid having thixotropic properties and having the size of a main solid phase of 50 to 250 mum and a solid-phase ratio of 30 to 70% is formed. The semi-solid is pressure cast into a mold through a nozzle while maintaining the semi-solid state to form metal products having a ratio of primary crystals of 20 to 50%.
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申请公布号 |
US7343959(B2) |
申请公布日期 |
2008.03.18 |
申请号 |
US20060504958 |
申请日期 |
2006.08.16 |
申请人 |
NISSEI PLASTIC INDUSTRIAL CO., LTD.;CHIBA INSTITUTE OF TECHNOLOGY |
发明人 |
MOTEGI TETSUICHI;TAKAYAMA KAZUTOSHI;TAKIZAWA KIYOTO |
分类号 |
B22D1/00;B22D17/08;B22D17/00;B22D21/04;B22D23/00;B22D25/00;B22D27/04 |
主分类号 |
B22D1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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