| 摘要 |
A powder metallurgy article formed of a sulfur-containing, precipitation- hardenable, stainless steel alloy is described. The article has a unique combination of strength, ductility, processability, and machinability. The powder metallurgy article is formed of a stainless steel alloy having the following composition in weight percent. C 0.03 max., Mn 1.0 max., Si 0.75 max., P 0.040 max., S 0.010-0.050, Cr 10-14, Ni 6-12, Ti 0.4-2.5, Mo 6 max., B 0.010 max., Cu 4 max., Co 9 max., Nb 1 max., Al 1 max., Ta 2.5 max., N 0.03 max. The balance of the alloy is iron and the usual impurities. The powder metallurgy article according to this invention is characterized by a fine dispersion of titanium sulfides that are not greater than about 5 .mu.m in major dimension. A method of preparing the powder metallurgy article is also described.
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