建筑用316L不锈钢微纳米双峰尺度组织及力学性能研究

Micro/nano Bimodal-scale Microstructures and Mechanical Properties of Stainless Steel 316L Used in Building

研究了建筑用316L不锈钢在冷变形前后的显微组织和力学性能。结果表明．316L不锈钢的硬度和应变诱导马氏体体积分数均随冷变形量的增加而增加。当冷变形量为90％、退火温度为815～860℃时，316L不锈钢的综合力学性能最佳，并且此退火温度范围对应材料的微纳米双峰尺度晶粒所占比例较高。

The microstructures and the mechanical properties of the stainless steel 316L used in building before and after cold deformation were investigated. The results show that the hardness and volume fraction of stain-induced martensite of 316L stainless steel increases with the increase of the cold deformation. The comprehensive mechanical properties of the material are the best when the cold deformation amount of the stainless steel 316L is 90% and the annealing temperature is 815-860 ℃, and the proportion of the micro/nano bimodal scale grains is also high in this annealing temperature range.