PIP工艺对粉末冶金FN04Mo钢性能的影响  

Effect of PIP process on properties of powder metallurgy FN04Mo steel

作　　者：肖永强 杜贵祥 祝伟 陈甥怡 罗德福[1] Xiao Yongqiang;Du Guixiang;Zhu Wei;Chen Shengyi;Luo Defu(School of Materials Science and Engineering,Xihua University,Chengdu Sichuan 610039,China;Jiangsu Yijun New Material Technology Co.,Ltd.,Wuxi Jiangsu 214000,China;Jiangsu Yihua New Material Technology Co.,Ltd.,Wuxi Jiangsu 214000,China;Sichuan Taiyimeite Technology Co.,Ltd.,Chengdu Sichuan 610100,China)

机构地区：[1]西华大学材料科学与工程学院,四川成都610039 [2]江苏奕珺新材料科技有限公司,江苏无锡214000 [3]江苏奕华新材料科技有限公司,江苏无锡214000 [4]四川泰一美特科技有限公司,四川成都610100

出　　处：《金属热处理》2025年第3期81-89,共9页Heat Treatment of Metals

摘　　要：为探究可控离子渗入(Programable ion permeation,PIP)技术工艺对金属粉末注射成型技术(Metal powder injection molding technology,MIM)制备的FN04Mo钢性能的影响,对MIM FN04Mo钢分别进行了4种不同时间的PIP工艺表面改性处理,得到化合物层厚度分别为5、10、15和20μm的4种试样,对渗层的显微组织、表面硬度及渗层的硬度分布、渗层脆性、拉伸性能、耐磨性能和耐腐蚀性能进行表征分析。结果表明,MIM FN04Mo钢处理前表面硬度为372.99 HV0.1,经PIP工艺处理后表面平均硬度达510 HV0.1,提升37%,脆性评级均为1级;经PIP处理后,随化合物层厚度的增加,屈服强度和抗拉强度略微下降,耐磨性逐渐提高;经PIP处理后试样的中性盐雾测试表明保护评级R_(p)均为10级,电化学试验表明,试样的阻抗增大,自腐蚀电位提高,自腐蚀电流密度降低,耐蚀性提高。To explore the influence of programable ion permeation(PIP)processes on the properties of FN04Mo steel prepared by metal powder injection molding technology(MIM),the MIM FN04Mo steel was subjected to surface modification treatments under four different PIP time,resulting in four types of specimens with compound layer thicknesses of 5,10,15,and 20μm,respectively.The microstructure,surface hardness,hardness distribution,brittleness,tensile properties,wear resistance,and corrosion resistance of the infiltration layer were characterized and analyzed.The results show that the surface hardness of MIM FN04Mo steel before treatment is 372.99 HV0.1.After being treated by the PIP process,the average surface hardness reaches 510 HV0.1,with an increase of 37%,and the brittleness rating is grade 1.After PIP treatment,with the increase of the thickness of compound layer,the yield strength and tensile strength slightly decrease,while the wear resistance gradually increases.The neutral salt spray test of the specimens after PIP treatment shows that the protection rating R_(p) is grade 10.The electrochemical test indicates that the impedance of the specimens increases,the self-corrosion potential rises,the self-corrosion current density decreases,and the corrosion resistance improves.

关 键 词：FN04Mo钢 金属粉末注射成型 可控离子渗入技术 脆性 耐磨性 耐蚀性 

分 类 号：TG156.8[金属学及工艺—热处理]