汉阳铁厂生产的钢轨钢的微观结构演变

Microstructural Evolution of the Rail Steels Manufactured by Hanyang Iron Works.

作者信息

Man Tinghui, Zhou Yihao, Dong Nan, Liu Tengshi, Dong Han

机构信息

School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China.

Zhejiang Institute of Advanced Materials, Shanghai University, Jiashan 314113, China.

出版信息

Materials (Basel). 2022 Aug 10;15(16):5488. doi: 10.3390/ma15165488.

DOI:10.3390/ma15165488

PMID:36013627

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9409968/

Abstract

The microstructural evolution of the rail steels manufactured by Hanyang Iron Works was investigated through optical microscopy (OM), scanning electron microscopy (SEM) and electron backscattered diffraction (EBSD). The OM and SEM images reveal that the microstructures are ferrite with a small amount of pearlite in the rail steel 1904, reticular ferrite and pearlite in the rail steels 1911 and 1921, and full pearlite in the rail steels 1917 and 1919, respectively. The EBSD results show that the rail steel 1904 holds the smallest average grain diameter owing to the pearlite with small size. Moreover, the average grain diameter of the pearlite cluster decreases in the rail steels manufactured after 1908, except for 1921, when it was on the verge of bankruptcy. The rail steels 1917 and 1919 exhibit a higher proportion of low angle grain boundaries and local misorientation with angles lower than 1°. Besides, the grain boundary misorientation holds a lower proportion in the range of 40~50° in the rail steels 1917 and 1919.

摘要

通过光学显微镜（OM）、扫描电子显微镜（SEM）和电子背散射衍射（EBSD）研究了汉阳铁厂生产的钢轨钢的微观结构演变。OM和SEM图像显示，1904钢轨钢的微观结构为铁素体和少量珠光体，1911和1921钢轨钢的微观结构为网状铁素体和珠光体，1917和1919钢轨钢的微观结构为全珠光体。EBSD结果表明，由于珠光体尺寸较小，1904钢轨钢的平均晶粒直径最小。此外，除了濒临破产的1921年，1908年后生产的钢轨钢中珠光体团簇的平均晶粒直径减小。1917和1919钢轨钢表现出较高比例的低角度晶界和角度低于1°的局部取向差。此外，1917和1919钢轨钢在40~50°范围内的晶界取向差比例较低。