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高强不锈钢的发展与应用技术

梁剑雄 , 刘振宝 , 杨志勇

宇航材料工艺

结合国内外高强度不锈钢的发展情况,介绍国内此类钢种研发最新成果及其强韧化机理,综合评价了其发展趋势和应用前景.

关键词: 高强度不锈钢 , 沉淀硬化不锈钢 , 相变控制 , 耐海洋环境腐蚀

Dynamic Recrystallization of a Cr-Ni-Mo-Cu-Ti-V Precipitation Hardenable Stainless Steel

A.Momeni , A.Shokuhfar , S.M.Abbasi

材料科学技术(英文)

In this research, the dynamic recrystallization (DRX) behavior of an as-cast precipitation hardenable (PH) stainless steel was investigated by conducting hot compression tests at temperatures between 950–1150oC and under strain rates of 0.001–1 s-1. The flow stress curves show that the DRX is responsible for flow softening during hot compression. The effects of temperature and strain rate on the strain and stress corresponding to peak point (ξp and θp) of flow curve were analyzed individually. It is realized that, they increase with strain rate and decrease with temperature. The relationship between Zener-Hollomon parameter (Z) and ξp was investigated and the equation ofξp =4.3×10-4Z0.14 was proposed. The strain for the maximum rate of DRX (ξmax) was determined under different deformation conditions. Therefore, it is realized that it increases with Z parameter and vise versa. On the basis of obtained results, the equation ofξmax =9.5×10-4Z0.12 was proposed.

关键词: Dynamic recrystallization , null , null

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