期刊论文

Research on Mechanics and Corrosion Properties of Laser Cladding on 40CrNiMo Steel Surface

中文

机械工程师

1002-2333

2022

03

54-56

衡阳市产学研结合专项（2019jhzx062）；

本校为第一机构

为了提高40CrNiMo钢基体的力学性能,采用1000 W光纤激光器在40CrNiMo钢基体表面上制备铁基熔覆层.分别采用扫描电子显微镜(SEM)、能谱分析仪(EDS)、X射线衍射(XRD)、万能试验机、显微硬度计等分析测试手段对涂层进行分析.结果表明:制备的涂层表面平整,基体与熔覆层之间存在明显的过渡区域,结合界面无气孔、裂纹等缺陷,与基体形成了较好的冶金结合.熔覆层显微组织由马氏体和少量的M23C6碳化物组成,基体与熔覆层之间的过渡区域主要以细小的等轴晶为主,熔覆层中部则以柱状晶和少量的树枝晶为主.熔覆层性能优异,相对于基体的抗拉强度、屈服强度和伸长率分别提高了21.4％、22.9％和16.7％,显微硬度为...

In order to improve the mechanical properties of 40CrNiMo steel matrix,1000 W fiber laser is used to prepare the iron-base cladding layer on the 40CrNiMo steel matrix surface.Scanning electron microscope(SEM),energy spectrum analyzer(EDS),X-ray diffraction(XRD),universal testing machine,microhardness tester and other analysis and testing means are used to analyze the cladding layer.The results show that the surface of the prepared coating is smooth,there is an obvious transition region between the substrate and the cladding layer,and there is no porosity,crack and other defects at the interfac...