节镍型奥氏体不锈钢的高温塑性

摘要

采用Gleeble-3800型热/力模拟试验机对不同铜含量的节镍型奥氏体不锈钢进行了高温拉伸试验,分析了拉伸断口附近显微组织,并对其高温塑性进行了研究。结果表明：奥氏体不锈钢在1 150～1 250℃具有较好的高温塑性;随着铜含量的增加高温塑性下降;铁素体含量及形状对其高温塑性影响较大,铁素体含量的增多和网状分布会使其高温塑性显著下降。%Tensile tests for nickel saving austenitic stainless steels with different Cu contents were performed at high temperatures by Gleeble-3800 thermo-mechanical simulator,and the microstructure near the tensile fracture and the thermoplasticity were analyzed and studied.The results show that the thermoplasticity of the austenitic stainless steels were fairly good during 1 150-1 250 ℃.With the increase of Cu content,the thermoplasticity of austenitic stainless steels decreased.The content and shape of ferrite had a great impact on the thermoplasticity of the steels.The increase of ferrite content and network ferrite made the thermoplasticity decreased significantly.