发明名称 |
Methods for manufacturing investment casting shells |
摘要 |
An at least two step heating process is used to strengthen the shell of an investment casting mold including a refractory metal core. The first stage may occur under otherwise oxidizing conditions at a low enough temperature to avoid substantial core oxidation. The second stage may occur under essentially non-oxidizing conditions at a higher temperature.
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申请公布号 |
US6951239(B1) |
申请公布日期 |
2005.10.04 |
申请号 |
US20040825396 |
申请日期 |
2004.04.15 |
申请人 |
UNITED TECHNOLOGIES CORPORATION |
发明人 |
SNYDER JACOB A.;BEALS JAMES T.;PERSKY JOSHUA E.;VERNER CARL R.;KENNARD LEA D.;MANDICH DAWN D.;MURRAY STEPHEN D. |
分类号 |
B22C9/04;B22C9/10;B22C9/12;B22C13/08;(IPC1-7):B22C9/04 |
主分类号 |
B22C9/04 |
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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