| 引用本文: | 付长明,刘常升,沈峰满,陈蜀源.QPQ盐浴复合处理技术对3Cr2W8V钢组织和性能的影响[J].材料科学与工艺,2011,19(6):7-15.DOI:10.11951/j.issn.1005-0299.20110602. |
| FU Chang-ming,LIU Chang-sheng,SHEN Feng-man,CHEN Shu-yuan.Influence of QPQ salt bath composite processing on microstructure and property of 3Cr2W8V steel[J].Materials Science and Technology,2011,19(6):7-15.DOI:10.11951/j.issn.1005-0299.20110602. |
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| 摘要: |
| QPQ盐浴复合处理是一种新的金属盐浴表面强化改性技术,将QPQ技术应用于3Cr2W8V钢,利用OM、SEM、显微硬度计、X射线衍射仪、高温摩擦磨损试验机和电化学工作站分别对QPQ渗层的显微组织、化学成分、显微硬度,物相,耐磨性和耐蚀性进行了分析研究.结果表明,QPQ渗层表面平整,当盐浴氮碳共渗时间一定时,随着氮碳共渗盐浴温度的升高渗层表面首先出现Fe3N相,其次出现Fe3O4和Fe4N相,最后出现Fe2N相.QPQ处理后试样的表面硬度在600～1400 HV0.1,基体硬度为520 HV0.1.经QPQ处理试样的最小磨损量仅为基体磨损量的1/2,且其摩擦系数也最小,其QPQ处理工艺为氮碳共渗温度580℃、氮碳共渗时间1 h.在氧化盐浴温度一定时,随着氧化时间的延长,腐蚀电位逐渐升高,耐蚀性能逐渐提高;当盐浴氧化参数设定为氧化温度380℃、氧化时间120 min时,QPQ处理得到的试样的腐蚀电位最高,耐蚀性能最佳. |
| 关键词: 化学热处理 QPQ 高温耐磨性 耐蚀性 极化曲线 |
| DOI：10.11951/j.issn.1005-0299.20110602 |
| 分类号:TG156.8 |
| 基金项目: |
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| Influence of QPQ salt bath composite processing on microstructure and property of 3Cr2W8V steel |
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FU Chang-ming1, LIU Chang-sheng1, SHEN Feng-man1, CHEN Shu-yuan2
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1.Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education),Northeastern University,Shenyang 110004,China;2.Chengdu Tool Research Institute,Chengdu 610051,China
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| Abstract: |
| QPQ salt bath composite process,which is a new modification technology of surface hardening of metal salt bath,was used to 3Cr2W8V steel,and with the help of OM,SEM,microhardness tester,X-ray diffraction,high-temperature friction and wear tester and electrochemical workstation,the microstructure,chemical composition,microhardness,phase,wear resistance and corrosion resistance of QPQ layer were analyzed.The results show that QPQ surface layer is flat,and when the salt bath nitrocarburizing time is certain,with the increasing of the nitrocarburizing salt bath temperature,the first appeared phase is Fe3N,followed by the emergence of Fe4N and Fe3O4 phases,and finally there is Fe2N phase.The surface microhardness of specimens treated by QPQ is 600～1400 HV0.1,and the matrix hardness is 520 HV0.1.The smallest wear loss of samples by QPQ treatment is half of that of matrix and the friction coefficient is the minimum,when the nitrocarburizing temperature is 580 ℃,and the nitrocarburizing time is 1 h.In the certain oxidation temperature of molten salt bath,the corrosion potential and the corrosion resistance increase gradually with the extended oxidation time.When the molten salt oxidation temperature is set to 380 ℃ and the oxidation time is 120 minutes,the corrosion potential of QPQ treated sample is the highest,and the corrosion resistance is the best. |
| Key words: chemical-heat treatment QPQ high temperature wear resistance corrosion resistance polarization curve |
