作者：周诗琦1, 王连庆2, 马文江1
作者单位：1. 北京科技大学自然科学基础实验中心，北京 100083;
2. 北京科技大学 新金属材料国家重点实验室，北京 100083
关键词：460 MPa耐火钢;高温硬度;有限元模拟;硬度值修正
摘要：
为测定材料在高温下的维氏硬度，提出一种间接测试金属材料高温硬度的修正方法。首先，对高温环境下的试件表面进行压头压入实验，待冷却至室温后测量压痕尺寸，得到相应的维氏硬度值。然后，采用有限元方法，考虑材料力学性能的温度依赖性，对高温环境下的压痕形貌进行数值模拟，得到相应的维氏硬度计算值。结果表明，在高温时两者之间的偏差较为明显，例如600 ℃时相对偏差达14%。结合有限元的分析结果，最后给出维氏硬度偏差修正的计算公式，为较准确地测量460 MPa耐火钢材料在高温时的硬度提供参考。
Study on high temperature hardness test of 460 MPa refractory steel
ZHOU Shiqi1, WANG Lianqing2, MA Wenjiang1
1. Basic Experimental Center for Natural Science, University of Science and Technology Beijing, Beijing 100083, China;
2. State Key Lab for Advanced Metals & Materials, University of Science and Technology Beijing, Beijing 100083, China
Abstract: To determine the Vickers hardness of the material at high temperature,a correction method for indirectly measuring the hardness of metal materials in high temperature environment is proposed. Firstly, the indentation test was carried out on the surface of the specimen at high temperature. After cooling to room temperature, the indentation size was measured, and the corresponding Vickers hardness value was obtained. Then, the finite element method was used to simulate the indentation morphology at high temperature, and the corresponding Vickers hardness values were obtained. The results show that the deviation between them is obvious at high temperature, such as 14% at 600 ℃. Combined with the results of finite element analysis, the calculation formula of correction deviation is given, which provides a reference for accurately measuring the hardness of 460 MPa refractory steel at high temperature.
Keywords: 460 MPa refractory steel;high temperature hardness;finite element simulation;hardness correction
2022, 48(4):1-5 收稿日期: 2021-05-26;收到修改稿日期: 2021-07-30
基金项目: 国家重点研发计划资助(2017YFB0304705)
作者简介: 周诗琦（1994-），女，内蒙古准格尔旗人，助理工程师，硕士，研究方向为实验力学
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