粉末冶金无镍奥氏体不锈钢的渗氮研究  

Study on nitriding of powder metallurgy nickel-free austenitic stainless steel

作　　者：李丹丹[1] 陈强[1] 蔡一湘[1] 

机构地区：[1]广东省工业技术研究院(广州有色金属研究院),广东广州州510650

出　　处：《材料研究与应用》2012年第1期34-37,共4页Materials Research and Application

摘　　要：在粉末冶金无镍奥氏体不锈钢的烧结冷却过程中,以气体渗氮方式对其进行渗氮处理.通过对其渗氮层金相组织的观察及力学性能和耐腐蚀性能的测试,结果表明,随着渗氮温度的升高,奥氏体不锈钢随炉冷却时析出物增多,其表层氮含量和表面硬度先增加后趋于平缓,抗弯强度先增加后下降并趋于稳定,而耐腐蚀性降低.The nickel-free austenitic stainless steel was treated by gas nitriding during the sinter cooling.The microstructure of the nitrided layer was observed by SEM,and the mechanical property and decay resistance were also tested.The results showed that as the rise of nitriding temperature,more nitride precipitates were obtained during furnace cooling,and that the surface nitrogen content and surface hardness increased at first and then leveled off,and meanwhile the buckling strength increased at first,and decreased and then stabilized,but the decay resistance was decreased.

关 键 词：无镍奥氏体不锈钢 渗氮 力学性能 抗腐蚀性 

分 类 号：TG142.71[一般工业技术—材料科学与工程]