1050车轮钢组织和力学性能各向异性的研究<br /><br /> <br />-中国材料进展

文章信息/Info

Title:: Investigation on Anisotropic Microstructure and Mechanical Properties of 1050 Wheel Steel

作者:: 张青松1; 李国栋2; 戴光泽1; 李秋泽2; 朱振宇1; 冯健1; （1. 西南交通大学材料科学与工程学院，四川成都 610031）
（2. 中车长春轨道客车股份有限公司转向架研发部，吉林长春 130062）

Author(s):: ZHANG Qingsong; DAI Guangze; Gao Jiewei; Zhu Zhenyu; Feng Jian; （School of Material Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China）

摘要:: 摘要：本文研究了1050车轮钢组织和力学性能的各向异性，对截取于经热处理后的1050钢冷轧棒材并与轧制方向成0°、30°、45°三个不同方向的标准圆棒拉伸试样在室温条件下进行拉伸试验，以及0°、15°、30°、45°四个不同方向的标准Charpy-U型冲击试样的冲击韧性试验，并观察断口形貌。结果表明：随着试样与轧制方向角度的增加，显微组织的均匀性逐渐变差；拉伸性能随着试样与轧制方向角度的增加而降低，其中屈服应力与抗拉强度下降比例分别为10.3%、7.4%，断口都是韧性断裂；冲击韧性随着试样与轧制方向角度的增加而降低，冲击吸收功下降的比例为27%。

Abstract:: This article investigated the anisotropic microstructure and mechanical properties of 1050 wheel steel. The tensile test for standard round bar specimens with 0°, 30° and 45°three different angles to rolling direction of cool rolling 1050 steel round bar after hot treatment were carried out at room temperature. And the impact toughness test for Charpy-U notched specimens with 0°, 15°, 30° and 45° four different angles to rolling direction were carried out at room temperature. The results showed that the homogeneity of microstructure decreased with increasing angle to rolling direction. The tensile properties decreased with increasing angle to rolling direction. The percentages of decline for yield strength and extension strength were 10.3% and 7.4% respectively and all fracture were ductile fracture. The impact toughness decreased with increasing angle to rolling direction and the percentages of decline for impact absorbing energy was 27%.