马泽冰,陆文林,丛培武,孙振田,姚佳伟,马靖博

• 1:中国机械总院集团北京机电研究所有限公司
• 2:中机真空科技(济南)有限公司

摘要(Abstract)：

采用真空低压变脉冲渗碳工艺对18CrNiMo7-6钢进行表面渗碳处理，分析变脉冲渗碳方式和渗碳压力对渗碳层硬度梯度和显微组织的影响，优化真空渗碳工艺参数。结果表明：相较于传统等脉冲渗碳，低压(500 Pa)变脉冲渗碳层的组织主要由隐针马氏体和细小弥散的碳化物组成，细小弥散碳化物作为渗碳层中的第二相粒子，可以抑制马氏体的长大，细化晶粒；渗碳层的硬度梯度分布较为理想，表面硬度达820 HV,表层高硬度区(≥800 HV)分布较深，约占整个渗碳层的50%。

关键词(KeyWords)： 18CrNiMo7-6钢;真空低压渗碳;变脉冲;弥散碳化物

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2023YFB3408000)

作者(Author): 马泽冰,陆文林,丛培武,孙振田,姚佳伟,马靖博

DOI: 10.13289/j.issn.1009-6264.2025-0007

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