316L奥氏体不锈钢的氮合金化  

Nitrogen Alloying of Austenitic Stainless Steel 316L

作　　者：淮凯文[1] 余式昌[1] 胡锦程[1] 

机构地区：[1]宝钢研究院不锈钢研究所,上海201900

出　　处：《宝钢技术》2007年第4期9-12,共4页Baosteel Technology

摘　　要：采用金相显微镜、XRD、拉伸试验机及高低温冲击试验机等,并结合Thermo-calc软件计算研究了氮对316L奥氏体不锈钢微观组织、析出相、力学性能和耐点蚀性能的影响。结果表明:氮合金化能够抑制316L不锈钢中σ相和Chi相的析出,增加Cr2N的析出倾向,对奥氏体晶粒细化不明显;氮的添加能够提高316L不锈钢的室温强度和-100℃以上温度的夏比冲击功,降低-100℃以下的夏比冲击功,但对室温拉伸塑性影响不明显。此外,氮能够改善316L不锈钢的耐点蚀能力。Effect of N addition on the microstructure, precipitate, mechanical properties and pitting-resistance property of austenitic stainless steel 316L was investigated with the help of the metallurgical microscope, X-ray diffraction （XRD）, tensile tester, high/low temperature impact tester, etc, and in combination with the Thermo-calc technology. Results show that the N addition can inhibit separation of the σ phase and Chi phase and increase the tendency of Cr2N precipitate, It is not obvious for austenitic grain refinement, The N addition can increase the 316L＇ s strength at the room temperature, and its Charpy impact power when it is above - 100℃, The N addition can also reduce the Charpy impact power when below - 100℃. It is not obvious for the steel＇ s tensile plasticity at the room temperature, In addition, nitrogen can improve the 316L＇s pitting-resistance property.

关 键 词：奥氏体不锈钢 氮合金化 微观组织 力学性能 耐点蚀能力 

分 类 号：TG142.13[一般工业技术—材料科学与工程]