不同热处理条件下高氮奥氏体不锈钢冷轧组织与力学性能研究  

Microstructure and Mechanical Properties of High Nitrogen Austenitic Stainless Steel After Cold Rolling by Different Heat Treatment

作　　者：孙会兰[1] 毕子墨 张迪[1] 朱立光 王波[1] SUN Hui-lan;BI Zi-mo;ZHANG Di;ZHU Li-guang;WANG Bo(School of Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,Hebei,China)

机构地区：[1]河北科技大学材料科学与工程学院,河北石家庄050018

出　　处：《矿冶工程》2021年第4期117-120,124,共5页Mining and Metallurgical Engineering

基　　金：国家自然科学基金(51974103);河北省自然科学基金(E2019208308 E2019208179);河北省重点研发计划项目(20311005D)。

摘　　要：利用蔡司显微镜、力学拉伸试验机、电子扫描显微镜等,研究了高氮奥氏体不锈钢冷轧前后不同热处理工艺对其组织及力学性能的影响。结果表明,无论轧制前是否经过退火处理,轧制后,再经过热处理都使高氮钢试样的抗拉强度明显降低,而延伸性得到明显提升,其中冷轧前1150℃×30 min退火且轧制后1050℃保温1 min的高氮钢试样的抗拉强度低但延伸性较好。这是由于轧制后的热处理能改善组织均匀性,在满足高氮钢抗拉强度的同时,提升了塑性,综合力学性能较好。By means of Zeiss microscope,mechanical tensile testing machine,scanning electron microscope,among others,the influences of different heat treatment processes on the microstructure and mechanical properties of high nitrogen austenitic stainless steel before and after cold rolling were studied.The results show that,regardless of whether or not it is annealed before rolling,the annealing treatment after rolling can significantly reduce the tensile strength of the high nitrogen steel specimen and improve its elongation.When the high-nitrogen stainless steel specimen is annealed at 1150℃for 30 min before cold rolling and then held at 1050℃for 1 min after cold rolling,the specimen shows a lower tensile strength and better elongation.This is because the heat treatment after cold rolling can improve the uniformity of the structure,but also improve plasticity of the specimen while ensuring the satisfied tensile strength,leading to the specimen with the better comprehensive mechanical properties.

关 键 词：高氮奥氏体不锈钢 冷轧 热处理 显微组织 力学性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程]