摘要
采用真空感应炉熔炼了4种不同Mo含量的00Cr12Ni9Mo(x)Cu2Ti马氏体时效不锈钢,研究了Mo含量对合金的完全固溶温度,以及随后的冷加工和时效处理工艺对合金的组织与性能的影响。金相观察发现在950℃～1100℃之间固溶时,晶粒随温度升高而增大;当Mo含量达到3.3%时,合金在1000℃以下固溶会有δ-铁素体析出。硬度分析发现,固溶温度对固溶态硬度几乎没有影响;增加Mo含量能提高马氏体时效不锈钢的峰值硬度以及抗过时效温度。耐腐蚀后的试验显示,1%的Mo含量即可有效提高合金的耐腐蚀性,时效4h对耐蚀性影响不大,当延长时效时间至400h,合金的耐腐蚀性严重受损。
Four 00Crl2Ni9Mo（x）Cu2Ti maraging stainless steel alloys with various Mo content （〈4） were melted with vacuum induction furnace. The effect of Mo concentration on the solid solution temperature of the alloys and the microstructure and properties after subsequent cold working and ageing process were studied. Microstructure analysis showed that crystal grain grew larger as the solution temperature elevated. 8- ferrite phase appeared in the alloy containing 3.3% Mo when solution treatment temperature was below 1000℃. Hardness tests showed that solution temperature hardly affect the hardness of the as-solution treated alloys. As the Mo concentration increased, the maximum hardness after ageing increased and the over-ageing temperature increased. Corrosion test showed that 1% Mo can improve corrosion resistance effectively. Aging within 4h did not dercease corrosion resistance. As the aging time extended to 400h, corrosion resistance degraded severely.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2013年第2期235-238,共4页
Journal of Materials Science and Engineering
关键词
马氏体时效不锈钢
硬度
抗过时效性
耐腐蚀性
maraging stainless steel
hardness
resistance to over-aging
corrosion resistance
