8Cr13马氏体不锈钢中碳化物细化工艺及其对性能的影响  

Process for refining carbides in 8Cr13 martensitic stainless steel and its effect on properties

作　　者：李铭煊 张覃轶[1,2] 蒋巍 郑伟平 伍冬 Li Mingxuan;Zhang Qinyi;Jiang Wei;Zheng Weiping;Wu Dong(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan Hubei 430070,China;Yangjiang Tuobituo Industrial Technology Research Institute Co.,Ltd.,Yangjiang Guangdong 529500,China;Zhejiang Zhengshi Sword Co.,Ltd.,Longquan Zhejiang 323700,China)

机构地区：[1]武汉理工大学材料科学与工程学院,湖北武汉430070 [2]阳江拓必拓工业技术研究院有限公司,广东阳江529500 [3]浙江郑氏刀剑有限公司,浙江龙泉323700

出　　处：《金属热处理》2024年第11期215-223,共9页Heat Treatment of Metals

基　　金：广东省科技创新专项(SDZX2021001)。

摘　　要：对8Cr13马氏体不锈钢进行不同固溶处理+不完全退火处理,研究钢中碳化物细化规律及其对最终淬回火后性能的影响。结果表明,高温固溶+不完全退火工艺可有效细化8Cr13钢中碳化物,随固溶温度升高、固溶时间延长,碳化物逐渐溶解,碳化物体积分数和碳化物尺寸减小。与未固溶直接淬回火试样相比,1100℃×4 h高温固溶+不完全退火试样淬回火后可获得最佳的综合性能,屈服强度、抗拉强度以及伸长率分别提升30.6%、8.3%以及147.7%,硬度略有降低但符合要求,自腐蚀电流密度降低一个数量级。Solution treatment and incomplete annealing were carried out for 8Cr13 martensitic stainless steel,then the carbides refinement and its effect on the final properties of the steel after quenching and tempering was studied.The results show that high temperature solution treatment and incomplete annealing process can effectively refine the carbides in the 8Cr13 steel.With the increase of solution treatment temperature and the extension of solution time,the carbides gradually dissolve,and the volume fractions and sizes of carbides decrease.Compared with the specimen directly quenched and tempered without solution treatment,the specimen solution treated at 1100℃for 4 h and incomplete annealed can obtain the best comprehensive properties after quenching and tempering.The yield strength,tensile strength and elongation are increased by 30.6%,8.3%and 147.7%,respectively,the hardness is slightly reduced but meets the requirements,and the self-corrosion current density is reduced by one order of magnitude.

关 键 词：8Cr13马氏体不锈钢 固溶处理 碳化物细化 力学性能 耐蚀性 

分 类 号：TG156[金属学及工艺—热处理]