喷砂预处理对20CrMnMo钢气体渗碳效率及渗层特性的影响  

Effect of sand blasting pretreatment on gas carburizing efficiency and carburized layer characteristics of 20CrMnMo steel

作　　者：缪小吉 宋璐 卢阳阳 孙斐 胡静[2] MIAO Xiao-ji;SONG Lu;LU Yang-yang;SUN Fei;HU Jing(Institute of Modern Equipment Manufacturing,Changzhou Institute of Industry Technology,Changzhou 213164,China;National Experimental Demonstration Center for Materials Science and Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]常州工业职业技术学院现代装备制造学院,江苏常州213164 [2]常州大学材料科学与工程国家级实验教学示范中心,江苏常州213164

出　　处：《材料热处理学报》2021年第5期124-128,共5页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(21978025);江苏省第三期优势学科建设项目(PAPD);江苏高校品牌专业建设工程资助项目(TAPP);江苏省高职院校青年教师企业实践培训项目(2020QYSJ124);常州工业职业技术学院青年创新基金项目(QN202013101001)。

摘　　要：采用光学显微镜、接触角测量仪、显微硬度计等研究了喷砂预处理对20CrMnMo钢气体渗碳效率及渗层特性的影响。结果表明:在相同的气体渗碳工艺条件下,喷砂预处理对20CrMnMo钢气体渗碳具有明显的催渗效果,有效硬化层深度由1.24 mm增加到1.59 mm,即渗碳效率提高了约30%。同时,喷砂预处理使气体渗碳渗层脆性明显降低。Effect of sand blasting pretreatment on gas carburizing efficiency and carburized layer characteristics of 20 CrMnMo steel was studied by means of optical microscope, contact angle measuring instrument and microhardness meter. The results show that under the same gas carburizing process, the gas carburizing efficiency of the 20 CrMnMo steel can be improved by sand blasting pretreatment, and the effective hardening layer depth is increased from 1.24 mm to 1.59 mm, that is, the carburizing efficiency is increased by about 30%. Meanwhile, the brittleness of the gas carburized layer is obviously reduced by sand blasting pretreatment.

关 键 词：20CRMNMO钢 喷砂处理 气体渗碳 渗碳效率 显微硬度 

分 类 号：TG174.44[金属学及工艺—金属表面处理]