发明名称 MEDIUM CARBON STEELS AND LOW ALLOY STEELS WITH ENHANCED MACHINABILITY
摘要 Medium carbon steels and low alloy steels having a concentration of a machinability enhancing agent ("MEA"), i.e., tin and/or antimony, at its ferrite grain boundaries which enhances the steel's machinability and to processes for producing such steels. The invention encompasses medium carbon steels and low alloy steels characterized by having MEA bulk contents of fro m about 0.02 to about 0.09 weight percent, by having the sum of the MEA bulk content and the copper bulk content being no greater than about 0.10 weight percent, and by having a microstructure at the time of machining having a concentration of MEA at ferrite grain boundaries in an amount at least about five times the MEA bulk content of the steel.
申请公布号 CA2373826(A1) 申请公布日期 2000.11.30
申请号 CA20002373826 申请日期 2000.05.26
申请人 UNIVERSITY OF PITTSBURGH 发明人 DEARDO, ANTHONY J.;GARCIA, C. ISAAC
分类号 C21D1/18;C21D1/26;C21D1/28;C22C38/00;C22C38/16;C22C38/60;(IPC1-7):C22C38/00;C21D6/00;C21D9/00 主分类号 C21D1/18
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