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  • 发布时间:2017-05-12   来源:  点击量:1426
    专利类型:  发明专利
    申请号:  US35496589
    申请日期:  1989-05-22
    公开号:  US5076858A
    公开日期:  1991-12-31
    申请人:  GEN ELECTRIC
    摘要:  A method of preparing a TiAl base composition containing niobium and chromium according to the formula Ti 48 Al 48 Cr 2 Nb 2 is taught. The composition is melted and cast. It is then homogenized at temperatures up to 1400° C. The cast and homogenized composition is enclosed in a restraining band, heated to forging temperature and forged. Following the forging, it is annealed and aged.
    主权项:  The method of processing a TiAl base alloy to impart desirable strength and ductility properties which comprises, providing a melt of the TiAl base alloy having the formula Ti 52-42 Al 46-50 Cr 1-3 Nb 1-5 , casting the melt to form an ingot, homogenizing the ingot at a temperature between 1250° C. and 1400° C. for one to three hours, heating the ingot at temperature between 900° C. and the incipient melting temperature, forging the ingot to reduce the ingot by at least 10% of its original thickness, and. annealing the forged ingot at temperatures between 1250° C. and the transus temperature for one to three hours.
    专利分类号:  C22F1/04;C22C14/00;C22F1/18;C22F1/018(5)
    专利状态:  失效专利
    代理机构:  Rochford Paul E.;Davis, Jr. James C.;Magee, Jr. James
    Method of processing titanium aluminum alloys modified by chromium and niobium
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