摘要
利用OM、SEM及TEM研究了增氮降镍对316奥氏体不锈钢的组织、析出相及力学性能的影响。结果表明:增氮降镍后试验钢仍为单一的奥氏体组织;试验钢在晶界处的M23C型碳化物析出相数量减少,有少量的碳氮化合物和氮化物析出相在晶界析出;试验钢的伸长率和断面收缩率变化不大,冲击功由260.6 J提高到294.3 J;抗拉强度由829.24 MPa上升到1221.67 MPa;屈服强度由585.06 MPa上升到878.57 MPa,显著提高了试验钢的力学性能。
The influence of increasing nitrogen and reducing nickel on microstructure,precipitation and mechanical properties of 316 stainless steel was investigated by optical microscope（ OM）,scanning electron microscope（ SEM） and transmission electron microscopy（ TEM）. The results show that the microstructure of the test steel is still the single austenitic after increasing nitrogen and reducing nickel,the amount of M23 C carbides precipitation decreases and a small amount of carbon nitride compounds and nitrides precipitation are precipitated on grain boundary. The elongation and shrinkage show little change,the impact energy increases from 260. 6 J to 294. 3 J;tensile strength increases from 829. 24 MPa to 1221. 67 MPa,and yield strength increase from 85. 06 MPa to 878. 57 MPa,the mechanical properties of the test steel increase dramatically.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2015年第10期83-88,共6页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(51364031)
关键词
316奥氏体不锈钢
增氮降镍
析出物
力学性能
316 austenitic stainless steel
increasing nitrogen and reducing nickel
precipitation
mechanical property
