Mn18Cr18N钢异步轧制过程的微观组织和显微硬度  

Microstructure and Microhardness of Fe-18Mn-18Cr-N non-magnetic stainless steel in asymmetric hot rolling

作　　者：宋艳磊 李长生[1] 韩亚辉[1] 马彪[1] 郑建军[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819

出　　处：《辽宁科技大学学报》2017年第1期24-29,共6页Journal of University of Science and Technology Liaoning

基　　金：国家自然科学基金(51274062)

摘　　要：研究了不同异步轧制速比对Mn18Cr18N无磁不锈钢板材微观组织和微观硬度的影响。结果表明,通过异步热轧,板材由表层到中心层的微观组织为梯度分布,表层晶粒细化效果明显;当异速比增至1.2时,表层晶粒细化至2.2μm,细晶层厚度为390μm;异步热轧板沿厚度方向的维氏显微硬度呈抛物线形式,随着异速比的增大,硬度总体水平下降,表层到中心层的硬度下降趋势增大。The effect of different speed ratios on the microstructure and microhardness of Mn18Cr18N non- magnetic stainless steel plates are examined during asymmetric rolling in this investigation. The results show a significant effect of the refinement grain can be obtained at the surface layer of asymmetric-rolled plates, and a gradient distribution of microstructure extends from both surface into the center of asymmetric-rolled plates. When the different speed ratio increases up to 1.2, the thickness of the refinement grain with an average size of 2.2 μm reaches 390 μm. The vicker microhardness distributions along the section direction of the plates are in the form of like-parabola. With the increase of different speed ratio, a decrease tendency is observed for the total level of microhardness, and then the slopes are declined in the spectrum ranging from the surface layer to the center layer.

关 键 词：无磁不锈钢 异步热轧 异速比 微观组织 显微硬度 

分 类 号：TG335.56[金属学及工艺—金属压力加工]