发明名称 |
A METHOD OF REDUCING THE POROSITY OF A CASTING |
摘要 |
A method of reducing the porosity of a casting (e.g. aluminum or al alloy) by subjecting the casting at elevated temperature to isostatic compression comprising the following steps:
(a) locating the casting (10) in a surrounding container (11) having at least one wall provided with at least one through-going channel (13),
b) heating the container with the enclosed casting
c) placing the heated container with the enclosed casting in a press chamber (20) of a fast-acting press, as for example a piston press,
d) filling said press chamber with a liquid pressure medium at a lower temperature than that of the heated container and casting, and
e) rapidly applying pressure to the liquid pressure medium.
<??>Thus the liquid pressure medium is rapidly forced through the channels in the walls of the container and thereby heated up by extracting heat from the walls of the container. |
申请公布号 |
DE3573615(D1) |
申请公布日期 |
1989.11.16 |
申请号 |
DE19853573615 |
申请日期 |
1985.11.02 |
申请人 |
ASEA AB |
发明人 |
GORANSSON, MICHAEL;NILSSON, JAN |
分类号 |
B21J1/02;B22D31/00;B30B5/02;C21D8/00;(IPC1-7):C21D8/00;C22F1/00 |
主分类号 |
B21J1/02 |
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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