发明名称 |
CASTING A METAL SINGLE CRYSTAL ARTICLE USING A SEED CRYSTAL AND A HELIX |
摘要 |
A method of epitaxially casting single crystal metal articles in molds, which comprises causing the solidification interface velocity vector to rotate through at least 90 degrees, preferably 180-540 degrees, about the axis of overall directional solidification growth. In addition, a mold section has a small passageway configured to prevent line of sight communication between the portion where the seed is contained and the article portion of the mold. Preferably, the passageway is shaped like a helix of 0.8-1.5 turns. A second seed can be formed in the mold of an article made from a first seed, and used to make a second casting. The invention reduces the normal increase in crystallographic variability which would otherwise be associated with such practice. |
申请公布号 |
DE3360534(D1) |
申请公布日期 |
1985.09.19 |
申请号 |
DE19833360534 |
申请日期 |
1983.01.14 |
申请人 |
UNITED TECHNOLOGIES CORPORATION |
发明人 |
GIAMEI, ANTHONY FRANCIS;SALKELD, RICHARD WALTER;ANDERSON, NEAL PAUL |
分类号 |
B22D27/04;C30B11/00;C30B11/14;C30B21/02;C30B29/52 |
主分类号 |
B22D27/04 |
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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