SUS304Lステンレス鋼焼結体の諸特性に及ぼすS, CuおよびSn添加の影響

概要

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An investigation was made on the characteristics of SUS304L bearing Cu and Sn and 303 stainless steel powders produced by water-atomization and, machinability, mechanical properties and corrosion resistance of sinterd materials made of these powders, have also been studied.The results obtained are as follows:(1) SUS303 stainless steel powder has a poor compressibility due to the hard CrS precipitate in matrix.(2) The compressibility of SUS303 can be improved to the level of SUS304L stainless steel powderds by Cu-addtion of about 4%.(3) The machinability of Cu-added 303 type sintered steel is improved by Sn-addition of about 1% consequently, tool life is prolonged in the increasing order as 304L(Sn)→303→304L-Cu·Sn→303-Cu·Sn.(4) Cu and Sn additions to 303 type sintered steel lower the ductibity by about 20%, while it practically suppresses the surface rusting of sintered steel which is caused by sulfer addition in 5% salt spray corrosion test.
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