发明名称 |
Method for locating metallic nitride inclusions in metallic alloy ingots |
摘要 |
A method of determining the location and history of metallic nitride and/or oxynitride inclusions in metallic melts. The method includes the steps of labeling metallic nitride and/or oxynitride inclusions by making a coreduced metallic-hafnium sponge from a mixture of hafnium chloride and the chloride of a metal, reducing the mixed chlorides with magnesium, nitriding the hafnium-labeled metallic-hafnium sponge, and seeding the sponge to be melted with hafnium-labeled nitride inclusions. The ingots are neutron activated and the hafnium is located by radiometric means. Hafnium possesses exactly the proper metallurgical and radiochemical properties for this use.
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申请公布号 |
US5110546(A) |
申请公布日期 |
1992.05.05 |
申请号 |
US19910696805 |
申请日期 |
1991.05.07 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE INTERIOR |
发明人 |
WHITE, JACK C.;TRAUT, DAVIS E.;ODEN, LAURANCE L.;SCHMITT, ROMAN A. |
分类号 |
G01N23/222;G01N33/20 |
主分类号 |
G01N23/222 |
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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