Nb对20CrMo齿轮钢渗碳层深度和硬度的影响

doi:10.13251/j.issn.0254-6051.2021.10.005

金属热处理 ›› 2021, Vol. 46 ›› Issue (10): 31-33.DOI: 10.13251/j.issn.0254-6051.2021.10.005

Nb对20CrMo齿轮钢渗碳层深度和硬度的影响

张伟^1,2, 谌康³, 李慧超², 王毛球¹

1.钢铁研究总院, 北京 100081;
2.中信金属股份有限公司, 北京 100004;
3.中国大唐集团科学技术研究院有限公司火力发电技术研究院, 北京 100040

收稿日期:2021-04-22 出版日期:2021-10-25 发布日期:2021-12-08
作者简介:张伟(1982—),男,高级工程师,博士研究生,主要研究方向为不锈钢和特殊钢领域铌微合金化技术,E-mail:zhangwei3@citic.com

Effect of Nb on carburizing depth and hardness of 20CrMo gear steel

Zhang Wei^1,2, Shen Kang³, Li Huichao², Wang Maoqiu¹

1. Ceneral Iron & Steel Research Institute, Beijing 100081, China;
2. CITIC Metal Co., Ltd., Beijing 100004, China;
3. Institute of Thermal Power Technology, China Datang Corparation Science and Technology Institute, Beijing 100040, China

Received:2021-04-22 Online:2021-10-25 Published:2021-12-08

摘要/Abstract

摘要： 通过对比分析含Nb和不含Nb的20CrMo钢在不同渗碳温度(950、1000、1050和1100 ℃)和时间(2、4和8 h)下的渗碳层深度和显微硬度,分析Nb微合金元素对渗碳过程中碳扩散速度和最终渗碳质量的影响。结果表明:在渗碳温度≤1000 ℃时,相同渗碳时间条件下,添加0.032%Nb的20CrMoNb钢渗碳件的渗碳层深度与20CrMo钢基本接近,有效渗碳层的最大硬度差值在10~50 HV0.2,Nb的添加对渗碳层深度和硬度影响较小;当渗碳温度＞1000 ℃时,添加Nb会降低有效渗碳层深度和硬度。

关键词: 20CrMo齿轮钢, Nb微合金钢, 表面渗碳

Abstract: According to comparative analysis of the depth and microhardness of the carburizing layer of 20CrMo steel containing Nb and without Nb carburized at different temperatures and carburizing time, the effect of Nb on carbon diffusion rate and final carburized layer quality was determined. The results show that the depth of carburized layer of 20CrMoNb steel with 0.032% Nb is close to that of 20CrMo steel at the same carburizing condition when the carburizing temperature is lower than 1000 ℃. And the maximum hardness difference of effective carburized layer is between 10 and 20 HV0.2, thus the addition of Nb has little effect on depth and hardness of the carburized layer. When the carburizing temperature is higher than 1000 ℃, the addition of Nb will reduce the depth and hordness of the effective carburized layer.

Key words: 20CrMo gear steel, and hardness Nb microalloyed steel, surface carburizing

中图分类号:

TG142.1

张伟, 谌康, 李慧超, 王毛球. Nb对20CrMo齿轮钢渗碳层深度和硬度的影响[J]. 金属热处理, 2021, 46(10): 31-33.

Zhang Wei, Shen Kang, Li Huichao, Wang Maoqiu. Effect of Nb on carburizing depth and hardness of 20CrMo gear steel[J]. Heat Treatment of Metals, 2021, 46(10): 31-33.

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Nb对20CrMo齿轮钢渗碳层深度和硬度的影响

Effect of Nb on carburizing depth and hardness of 20CrMo gear steel

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