发明名称 |
Mechanochemical process for producing fine WC/CO composite powder |
摘要 |
A mechanochemical process for producing fine WC/Co composite powder which is so small in WC grain size and in mean free path, and contains such a uniform distribution of WC and Co that its hard metal is superior in strength, compressive strength, TRS and wear resistance and considerably free of impurities. The method comprises the steps of drying an ammonium metatungstate-Co(NO3)2 solution in a spray dry manner to give initial powder of porous spheroids or in a common manner to give a cake of initial powder, removing the salts and humidity from the initial powder by a thermal treatment, mixing and milling the desalted initial powder with carbon black, and subjecting the mixed powder to reduction/carburization in a reactor.
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申请公布号 |
US5882376(A) |
申请公布日期 |
1999.03.16 |
申请号 |
US19970910588 |
申请日期 |
1997.07.25 |
申请人 |
KOREA INSTITUTE OF MACHINERY & MATERIALS |
发明人 |
KIM, BYOUNG-KEE;LEE, GIL-GEUN;HA, GOOK-HYUN;LEE, DONG-WON |
分类号 |
B22F9/08;B22F9/00;B22F9/22;C22C1/05;(IPC1-7):B22F9/26 |
主分类号 |
B22F9/08 |
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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