论文部分内容阅读
利用拉伸、金相显微镜和扫描电镜等方法研究了不同热处理制度对奥氏体不锈钢022Cr17Ni12 Mo2材料组织与力学性能的影响。结果表明:随着加热温度由950℃升高到1 250℃,材料022Cr17Ni12 Mo2的晶粒越来越粗大,α相含量呈先降后升的趋势,在1 150℃达到最低点1.60%;试验材料的抗拉强度Rm、规定非比例强度Rp0.2和Rp1.0均发生了不同程度的下降,塑性明显提高。冷却方式对试验材料的晶粒大小、抗拉强度和伸长率几乎没有影响,但与空冷方式相比,采用水冷方式有利于组织中α相含量的降低,规定非比例强度Rp0.2和Rp1.0均提高了30 MPa到40 MPa。
The effects of different heat treatment systems on the microstructure and mechanical properties of 022Cr17Ni12 Mo2 austenitic stainless steel were investigated by means of stretching, optical microscope and scanning electron microscope. The results show that as the heating temperature increases from 950 ℃ to 1 250 ℃, the grain size of 022Cr17Ni12 Mo2 becomes larger and larger. The content of α phase first descends and then increases and reaches the lowest point of 1.60% at 1 150 ℃. Tensile strength of the material Rm, the provisions of the non-proportional strength Rp0.2 and Rp1.0 have occurred in varying degrees of decline, plastic significantly improved. The cooling mode has almost no effect on the grain size, tensile strength and elongation of the test materials. However, compared with the air cooling method, the water cooling method is beneficial to the reduction of α phase content in the structure, and provides the non-proportional strength Rp0.2 and Rp1. 0 are increased by 30 MPa to 40 MPa.