发明名称 |
Method of casting with improved detectability of subsurface inclusions |
摘要 |
Method of making a casting by investment casting of a metal or alloy, especially titanium and its alloys, in a ceramic investment shell mold in a manner to provide enhanced x-ray detectability of any sub-surface ceramic inclusions that may be present below exterior surfaces of the casting. The method involves forming a ceramic mold facecoat and/or back-up layer including erbia or other x-ray or neutron-ray detectable ceramic component. The facecoat/back-up layer is/are formed using a ceramic slurry comprising erbia and other optional ceramic particulates, an inorganic binder, and an inorganic pH control agent. The slurry is applied to a pattern of component to be cast to form the mold. A metal or alloy is cast in the mold, and the solidified casting is removed from the mold. The casting is subjected to radiography to detect any sub-surface ceramic inclusions below the exterior surface thereof not detectable by visual inspection of the casting. <IMAGE> |
申请公布号 |
EP0914884(A1) |
申请公布日期 |
1999.05.12 |
申请号 |
EP19980119434 |
申请日期 |
1998.10.15 |
申请人 |
HOWMET RESEARCH CORPORATION |
发明人 |
LASSOW, ELIOT S.;STRABEL, GEORGE R.;KOZIOL, KELLY A. |
分类号 |
B22C1/00;B22C1/16;B22C9/04;B22D21/00;B22D29/00;B22D46/00 |
主分类号 |
B22C1/00 |
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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