金属热处理 ›› 2021, Vol. 46 ›› Issue (8): 205-208.DOI: 10.13251/j.issn.0254-6051.2021.08.039

• 工艺研究 • 上一篇    下一篇

液压柱塞泵用30CrMoV9钢的调质与气体渗氮工艺

王镌, 胡柯, 钟湘玲, 金永黔   

  1. 力源液压(苏州)有限公司 贵阳分公司, 贵州 贵阳 550018
  • 收稿日期:2021-03-17 出版日期:2021-08-25 发布日期:2021-12-09
  • 作者简介:王 镌(1980—),女,工程师,学士,主要研究方向为材料性能与热处理工艺,E-mail:wang_juan@liyuansz.com

Quenching and tempering and gas nitriding processes of 30CrMoV9 steel for hydraulic piston pump

Wang Juan, Hu Ke, Zhong Xiangling, Jin Yongqian   

  1. Li Yuan Hydraulic(Suzhou) Co., Ltd., Guiyang Guizhou 550018, China
  • Received:2021-03-17 Online:2021-08-25 Published:2021-12-09

摘要: 为提高液压柱塞泵用30CrMoV9钢的综合性能及表面的耐磨性和抗疲劳性,对30CrMoV9钢的调质工艺及粗加工后的气体渗氮工艺进行了研究,对调质硬度、渗氮层深度、渗氮后的显微组织、渗氮层硬度等进行了测试。结果表明,经900 ℃淬火及630~640 ℃的回火处理后,30CrMoV9钢可满足硬度在28~35 HRC的要求;调质态30CrMoV9钢进行气体渗氮处理后,表面平均硬度可达750 HV0.5以上,可有效提高零件的接触疲劳强度。

关键词: 30CrMoV9钢, 调质, 气体渗氮, 综合性能, 显微组织

Abstract: In order to improve the comprehensive performance and surface wear resistance and fatigue resistance of the 30CrMoV9 steel for hydraulic piston pump, the quenching and tempering process and the gas nitriding process after rough machining of the 30CrMoV9 steel were studied, and the quenched and tempered hardness, nitrided layer depth, nitrided microstructure and nitrided layer hardness were tested. The results show that after quenching at 900 ℃ and tempering at 630-640 ℃, the tested steel can meet the requirement of hardness in the range of 28-35 HRC. After gas nitriding, the average surface hardness of the quenched and tempered 30CrMoV9 steel can reach more than 750 HV0.5, which can effectively improve the contact fatigue strength of parts.

Key words: 30CrMoV9 steel, quenching and tempering, gas nitriding, comprehensive performance, microstructure

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