| 引用本文: | 吴宏观, 蔡航伟, 马志康, 王成磊, 李冰, 高原.钨钼钇共渗强化层的回火硬度及红硬性[J].中国表面工程,2012,25(2):63~68 |
| WU Hong-guan, CAI Hang-wei, MA Zhi-kang, WANG Cheng-lei, LI Bing, GAO Yuan.Tempering Hardness and Red-hardness of Strengthen-layer after Plasma W-Mo-Y Surface Alloying Process[J].China Surface Engineering,2012,25(2):63~68 |
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| 摘要: |
| 利用双层辉光等离子渗金属技术，在Q235钢表面分别进行钨钼钇共渗与钨钼共渗，形成均匀致密合金扩散层；共渗后，将两种试样分别在960 ℃、980 ℃、1020 ℃下进行8 h渗碳及淬火，并在200 ℃低温回火1 h。之后将两者在1 020 ℃渗碳及淬火，并分别进行200~700 ℃回火。采用显微硬度仪检测其表面硬度，采用光学显微镜、SEM及EDS分别对渗层进行金相组织及成分分析。结果表明：其回火特征与冶金高速钢类似，在500 ℃时出现“二次硬化”现象，回火硬度达到峰值，且前者高于后者。将经过1 020 ℃渗碳淬火后的两种试样在600 ℃下保温1 h后空冷，重复4次后，前者与后者的表面硬度最大值分别达到750 HV0.05、650 HV0.05。 |
| 关键词: 钨钼钇共渗 钨钼钇共渗强化层 回火硬度 红硬性 |
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| 基金项目:国家自然科学基金（50764002）； 信息材料广西重点实验室主任研究课题(桂科能071090806Z)； 广西区自然科学基金(2010GXNSFD013008) |
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| Tempering Hardness and Red-hardness of Strengthen-layer after Plasma W-Mo-Y Surface Alloying Process |
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WU Hong-guan, CAI Hang-wei, MA Zhi-kang, WANG Cheng-lei, LI Bing, GAO Yuan1,2
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1. School of Electromechanical and Architectural Engineering, Jianghan University, Wuhan 430056;2. School of Materials Science and Technology, Guilin University of Electronic Technology, Guilin Guangxi, 541004
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| Abstract: |
| A uniform dense alloyingdiffusionlayer on the surface of Q235 steel was formed by the double glow plasma W-Mo-Y surface alloying process and W-Mo surface alloying process respectively in order to form. Then they were conducted low temperature tempering process at 200 ℃ for 1 h after carburizing and quenching process at 960 ℃, 980 ℃ and 1 020 ℃ for 8 h respectively. Afterwards two surface alloys were carburized and quenched at 1 020 ℃, and then tempered at 200~700 ℃ respectively. The microhardness and its distribution, microstructure and content distribution of alloying layer were analyzed respectively by microhardness tester, metalloscope, SEM and EDS. The results is showed as follows: the tempering behavior of the layers is the same as that of the metallurgy high speed steel. The secondary hardening occures at 500 ℃, when the tempering hardness reaches the maximum, higher than that of WMo surface alloy. When two surface alloys that are conducted by carburizing and quenching process at 1 020 ℃ are air cooled after thermal insulating at 600℃ for 1 h, their maximum hardness values become 750 HV0.05 and 650 HV0.05 respectively after being repeated for 4 times. |
| Key words: W-Mo-Y surface alloying strengthen-layer of W-Mo-Y alloy tempering hardness red-hardness |
