[1]徐广涛,孙博,陈海宽,等.表面变质层硬度的压痕表征方法[J].郑州大学学报(工学版),2021,42(04):58-62.[doi:10.13705/j.issn.1671-6833.2021.04.017]
　Xu Guangtao,Sun Bo,Chen Haikuan,et al.Indentation Characterization Method for Hardness of Surface-modified Layer[J].Journal of Zhengzhou University (Engineering Science),2021,42(04):58-62.[doi:10.13705/j.issn.1671-6833.2021.04.017]
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表面变质层硬度的压痕表征方法()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
42卷
期数:
2021年04期
页码:
58-62
栏目:
出版日期:
2021-07-30

文章信息/Info

Title:
Indentation Characterization Method for Hardness of Surface-modified Layer
作者:
徐广涛; 孙博; 陈海宽; 郑雪峰
郑州大学机械与动力工程学院;
Author(s):
Xu Guangtao; Sun Bo; Chen Haikuan; Zheng Xuefeng;
School of Mechanical and Power Engineering, Zhengzhou University;
关键词:
Keywords:
indentation hardness; surface-modified layer; heat treatment; 18CrNiMo7-6 alloy steel
DOI:
10.13705/j.issn.1671-6833.2021.04.017
文献标志码:
A
摘要:
关键构件经过热处理等表层改性处理后产生的表面变质层，其硬度沿深度梯度变化，如何测量表面变质层硬度是一个亟需解决的问题。本文提出了一种表面变质层硬度的表征方法，根据硬度与深度的关系，使用逐步连续压痕加载将变化的表面变质层硬度进行表征。只要压入深度超过表面变质层深度就能将整个表面变质层的硬度信息提取出来。通过ANSYS有限元仿真建立表面变质层-基体梯度模型，施加连续压痕验证该方法的正确性。对18CrNiMo7-6合金钢进行渗碳热处理，使其表面产生表面变质层，并用该方法表征热处理后的18CrNiMo7-6合金钢的表面变质层硬度。将测量结果与沿表面变质层侧面表征的显微硬度结果进行比较，结果表明该方法能准确的表征表面变质层的真实硬度场。
Abstract:
In order to measure the hardness parameters of the surface-modified layer(SML)of key components after surface modification,in this paper a method to characterize the hardness of the SML was proposed.According to the relationship between hardness and depth,continuous indentation loading was used to characterize the hardness of the SML.The SML-substrate model was established through ANSYS finite element simulation,and continuous indentation was applied to verify that the calculation hardness was very close to the real hardness.Carburizing heat treatment was performed on 18CrNiMo7-6 alloy steel to produce a SML on the surface,and the hardness of the SML of the heat-treated 18CrNiMo7-6 alloy steel was characterized by this method.Compared with the micro hardness results characterized along the side of the SML,it was found that the hardness error of the SML obtained by the two methods was no more than 6%.This method could be used to characterize the real hardness of the SML on the surface of the material,and had certain engineering application value.
更新日期/Last Update: 2021-08-26