Cu含量对316奥氏体不锈钢组织与性能的影响

Effect of Cu Content on Microstructure and Properties of 316 Austenitic Stainless Steel

摘要: 通过感应熔炼制备出了Cu元素含量不同的316不锈钢，通过扫描电镜(SEM)、透射电镜以及力学试验机等手段，研究了316不锈钢的显微组织以及力学性能。结果表明：随着铜含量的增加，合金强度先上升后下降，塑性也表现出相同的趋势。研究结果表明当铜含量为0.3%的时候，其综合性能达到最佳，硬度、抗拉强度、屈服强度和伸长率分别为252 HV、612 MPa、332 Mpa以及41%。通过TEM观察发现，随着Cu含量的不断增加，Cu逐渐富集在晶界处。

Abstract: 316 stainless steel with different Cu content was prepared by induction melting. The microstruc-ture and mechanical properties of 316 stainless steel were studied by means of scanning electron microscopy (SEM), transmission electron microscopy and mechanical testing machine. Results in-dicate that as the copper content increases, the strength of the alloy first rises and then decreases, and the plasticity also shows the same trend. The results show that when the copper content is 0.3%, the overall performance is optimal, and the hardness, tensile strength, yield strength and elongation are 252 HV, 612 MPa, 332 Mpa and 41%, respectively. It was found by TEM observation that as the Cu content increased, Cu gradually enriched at the grain boundary.