HKS-G表面强化技术对Cr8冷作模具钢耐磨性的影响  

Effect of HKS-G surface strengthening technology on wear resistance of Cr8 cold work die steel

作　　者：元莎 蒋起臣[2] 侯惠敏 陈浩 刘修苹 蒋鹏 Yuan Sha;Jiang Qichen;Hou Huimin;Chen Hao;Liu Xiuping;Jiang Peng(China Academy of Machinery Beijing Research Institute of Mechanical and Electrical Technology Co.,Ltd.,Beijing 100083,China;Beijing North Vehicle Group Corporation,Beijing 100713,China)

机构地区：[1]中国机械总院集团北京机电研究所有限公司,北京100083 [2]北京北方车辆集团有限公司,北京100713

出　　处：《锻压技术》2024年第11期144-148,共5页Forging & Stamping Technology

基　　金：国家重点研发计划资助项目(2016YFB0300405)

摘　　要：研究一种新型的表面强化处理方法HKS-G,以提高Cr8冷作模具钢表面耐磨性。采用多源多弧离子镀法,在真空状态下通入N_(2)气体,在Cr8冷作模具钢表面形成多元系HKS-G涂层。通过XRD、SEM、EDS、金相显微镜、洛氏硬度仪等研究涂层厚度、组织、性能对材料表面耐磨性的影响。根据Archard模型,利用仿真模拟有涂层和无涂层模具的磨损量,计算模具寿命。结果表明:HKS-G表面涂层厚度为10.8μm,涂层硬度达到3326 HV。涂层与基体结合较好,且有过渡层存在,涂层的截面硬度梯度变化平缓。HKS-G涂层膜基结合良好,等级为HF1级。HKS-G涂层模具的最大磨损量为2.1×10^(-8)mm,与无涂层模具相比,最大磨损量减少了23%,模具寿命达到476190次。HKS-G表面强化处理可提高模具材料的耐磨性,延长模具寿命。A new surface strengthening treatment method HKS-G was studied to improve the surface wear resistance of Cr8 cold work die steel,and using multi-source and multi-arc ion plating method,N_(2)gas was introduced under vacuum state to form a multi-component HKS-G coating at the surface of Cr8 cold work die steel.Then,the influences of coating thickness,microstructure and properties on the surface wear resistance of the material were studied by XRD,SEM,EDS,metallographic microscope,Rockwell hardness tester,etc.According to the Archard model,the wear amount of coated and uncoated dies were simulated to calculate the die life.The results show that the surface coating thickness of HKS-G is 10.8μm,and the coating hardness reaches 3326 HV.The coating has a good bonding with the substrate,and there is a transition layer.The hardness gradient of the coating section changes smoothly.HKS-G coating has good adhesion with the grade of HF1.The maximum wear amount of die with HKS-G coating is 2.1×10^(-8)mm,which is 23%less than that of uncoated die.The die life reaches 476190 times.HKS-G surface strengthening treatment can improve the wear resistance of die materials and extend the die life.

关 键 词：Cr8冷作模具钢 表面强化 涂层 硬度 耐磨性 模具寿命 

分 类 号：TG142[一般工业技术—材料科学与工程]