9310渗碳钢强流脉冲电子束表面钛合金化处理的结构与性能  

Microstructure and Properties of Ti Alloying Surface on 9310 Carburizing Steel by High Current Pulsed Electron Beam

作　　者：吴春雷[1,2] 罗甸 马廷涛 马欣新[3] 孙志国[4] 

机构地区：[1]牡丹江师范学院理学院,黑龙江牡丹江157012 [2]哈尔滨工业大学材料科学与工程学院,哈尔滨150001 [3]哈尔滨工业大学先进焊接与连接国家重点实验室,哈尔滨150001 [4]沈阳造币厂,沈阳110042

出　　处：《中国表面工程》2014年第2期88-94,共7页China Surface Engineering

基　　金：国家重点基础研究发展计划(973计划)(2013CB632305)

摘　　要：为进一步提高SAE9310钢表面渗碳层的耐磨性和耐蚀性,采用强流脉冲电子束(HCPEB)技术在不同的能量密度下对SAE9310渗碳钢进行表面钛合金化处理。并通过扫描电子显微镜、X射线衍射仪、显微硬度计、摩擦磨损试验及电化学试验等研究了钛合金化试样的表面及截面形貌、相组成及性能等。结果表明:强流脉冲电子束辐照后钛以合金元素形式固溶于基体中,重熔层奥氏体含量增加。钛合金化层腐蚀电位由未处理时的-0.577V提高至-0.539V,自腐蚀电流密度降至2×10-7 A/cm2,较未处理试样低1个数量级。合金化处理后样品表面显微硬度与原始样品接近,硬度约为780HV0.25,但干摩擦因数由0.8降至0.15,磨损率降低接近3倍。电子束表面钛合金化处理可以提高9310钢渗碳层的耐磨性和耐蚀性。High current pulsed electron beam （HCPEB） treatment with various energy densities has been used to alloy Ti on the surface of SAE9310 carburizing steel to improve the wear resistance and corrosion resistance. The surface and section morphology, phase composition and performance were studied by scanning electron microscopy, Xray diffraction instruments, microhardness tester, frictional wear test and electrochemical experiments, respectively. After HCPEB alloying treatment, Ti solutionized in the remelting layer, while the austenite increased. Compared with the untreated samples, the corrosion potential rose from -0.577 V to -0.539 V, the corrosion current density dropped to 2×107A/cm2 by one order of magnitude. The hardness of the sample was almost unchanged after alloying, hardness is about 780 HV0.25, however, the friction coefficient was reduced from 0.8 to 0.15 and wear rate was reduced 3 times. All the results above show that Ti alloying by HCPEB on the surface of SAE9310 carburizing steel improved its friction resistance and corrosion resistance.

关 键 词：SAE9310渗碳钢 强流脉冲电子束 辐照 钛合金化 

分 类 号：TG174.4[金属学及工艺—金属表面处理]