华东交通大学学报2018，Vol.35Issue(1)：97-102,6.
冷轧退火不锈钢焊接接头的组织及性能研究
Study on Microstructure and Properties of Welded Joints of Stainless Steel Treated by Cold Rolling and Annealing
魏康 1李康 2李建生 1高波 1毛庆忠 1王帅卓1
作者信息
- 1. 南京理工大学材料科学与工程学院纳米异构材料中心,江苏 南京210094
- 2. 中车南京浦镇车辆有限公司设计开发部,江苏 南京210031
- 折叠
摘要
Abstract
316L stainless steels with heterogeneous lamella structures were prepared by cold rolling and subse-quent annealing treatment. Then cold rolled steel plates were single and double welded by using GTAW welding process.Finally,microstructure and mechanical properties of rolled specimens and the welded joints were inves-tigated. The research results show that ultra-fined grains lamella structures are formed in the 316L stainless steels treated by cold rolling. The rolled samples exhibit a high tensile strength of 1 058.9 MPa, an increase of 70.6% than that of original base metal samples. But the ductility reduces significantly, with a lower fracture e-longation of 16.9%. Weld microstructure of welded joints are typical equiaxial dendritic austenite, and a small amount of δ-ferrite. Coarse austenite grains are formed in the heat affected zone. Tensile strength of single-side welded joints is 608.1 MPa, and the elongation reaches to 15.3%, while mechanical properties of double-side welded joints appear a slight reduction.Equiaxed dimples morphologies are observed on all the fracture surfaces.关键词
冷轧处理/316L不锈钢/焊接接头/微观组织/力学性能Key words
cold rolling treatment/316L stainless steel/welded joints/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
魏康,李康,李建生,高波,毛庆忠,王帅卓..冷轧退火不锈钢焊接接头的组织及性能研究[J].华东交通大学学报,2018,35(1):97-102,6.
