Abstract: The tested super austenitic stainless steel 022Cr24Ni17Mo5Mn6NbN (/% : 0. 028C, 0. 33Si, 6. 21Mn, 24. 93Cr, 17. 03Ni, 4. 24Mo, 0. 45N) is melted by 1 t non vacuum induction furnace and electroslag remelting process, and rolled into Φ 40 mm bar after Φ360 mm electroslage ingot forging. The microstructure, pitting corrosion resistance and mechanical properties of the steel as hot-rolled (end rolling at 1 000 °C , WC) and after solution at 1 070 ~ 1 180 °C are studied. The tested results show that with the increases of solution temperature, the grain size of steel gradually grows, the strength of steel decrease and the plasticity increases, and the pitting corrosion resistance improves. Uniform structure, better pitting corrosion resistance and good mechanical properties of steel are obtained by solid solution at 1 120 °C.

摘要： 实验用022Cr24Ni17Mo5Mn6NbN超级奥氏体不锈钢（/%:0.028C,0.33Si,6.21 Mn,24.93Cr,17.03Ni,4.24Mo,0.45N）采用1 t非真空感应+电渣重熔的工艺冶炼,Φ360 mm电渣锭经锻造开坯后轧制为Φ40mm棒材研究了热轧态（终轧1 000℃,水冷）和经1 070～1 180℃固溶后钢的组织、点腐蚀性能和力学性能实验结果表明,随固溶温度的升高,该钢品粒逐渐长大,强度降低,塑性增加,耐点腐蚀性能得到改善。采用1 120℃进行固溶,该钢可以获得均匀的组织、优异的点腐蚀性能和良好的综合力学性能。

关键词: 超级奥氏体不锈钢022Cr24Ni17Mo5Mn6NbN, 固溶温度, 组织, 力学性能, 点腐蚀性能