金属热处理 ›› 2024, Vol. 49 ›› Issue (11): 267-271.DOI: 10.13251/j.issn.0254-6051.2024.11.041

• 工艺研究 • 上一篇    下一篇

Nb微合金化17CrNiMo6钢齿轮轴的高温渗碳工艺

韩春阳1, 胡寒婷1, 张沛2, 赵学谦1, 王明飞1   

  1. 1.中信重工机械股份有限公司 计量检测中心, 河南 洛阳 471000;
    2.洛阳中重铸锻有限责任公司, 河南 洛阳 471000
  • 收稿日期:2024-05-03 修回日期:2024-09-13 出版日期:2024-11-25 发布日期:2025-01-09
  • 作者简介:韩春阳(1979—),男,高级工程师,主要研究方向为矿山装备设计、质量管理与失效分析,E-mail:20457208@qq.com

High temperature carburizing process of Nb microalloyed 17CrNiMo6 steel gear shaft

Han Chunyang1, Hu Hanting1, Zhang Pei2, Zhao Xueqian 1, Wang Mingfei1   

  1. 1. Measurement and Testing Center, CITIC Heavy Industries Co., Ltd., Luoyang Henan 471000, China;
    2. Luoyang CITIC-HIC Casting and Forging Co., Ltd., Luoyang Henan 471000, China
  • Received:2024-05-03 Revised:2024-09-13 Online:2024-11-25 Published:2025-01-09

摘要: 对17CrNiMo6钢进行Nb微合金化,研究其不同Nb添加量下的奥氏体晶粒度。并对Nb微合金化17CrNiMo6钢进行不同温度(910、930、940 ℃)的高温渗碳处理,对其有效硬化层深度和力学性能进行了研究。结果表明,经Nb微合金化后,17CrNiMo6钢的奥氏体晶粒细化效果显著,且随着Nb含量的增加,奥氏体晶粒等级增大,合适的Nb添加范围为0.03%~0.04%。与910 ℃高温渗碳相比,含0.032%Nb微合金化17CrNiMo6钢经930和940 ℃高温渗碳后,有效硬化层深度增加,渗碳速度分别提高8.3%~11.9%、13.3%~15.3%,但力学性能、晶粒度均无明显区别。因此,可通过适当提升渗碳温度加快微合金化17CrNiMo6钢的渗碳速度。

关键词: 17CrNiMo6齿轮钢, Nb微合金化, 高温渗碳, 晶粒度, 有效硬化层深度

Abstract: Effect of Nb microalloying on the austenite grain size of the 17CrNiMo6 steel under different Nb addition was studied, and high temperature carburizing was carried out on the tested steel at different temperatures (910, 930, 940 ℃) by measuring the effective hardening layer depth and mechanical properties. The results show that the effect of Nb microalloying on the austenite grain refinement of the 17CrNiMo6 steel is significant, and the Nb content increases, the austenite grain grade increases, and the appropriate Nb addition range is 0.03%-0.04%. Compared with high temperature carburizing at 910 ℃, the effective hardening layer depth of the 17CrNiMo6 steel with 0.032%Nb is increased after high temperature carburizing at 930 ℃ and 940 ℃, and the carburizing rate is increased by 8.3%-11.9% and 13.3%-15.3%, respectively. However, there is no significant difference in mechanical properties and grain size. The carburizing rate of the microalloyed 17CrNiMo6 steel can be accelerated by appropriately increasing the carburizing temperature.

Key words: 17CrNiMo6 gear steel, Nb microalloying, high temperature carburizing, grain size, effective hardening layer depth

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