钢轨加工开裂原因分析
ANALYSIS ON WORKING CRACKING OF RAIL
摘 要
60kg/m型钢轨在改制异型轨的过程中其轨腰处出现纵向裂纹。采用JSM-5600LV扫描电镜、INCA能谱仪和光学显微镜等对开裂钢轨进行了分析。结果表明，由于加热不均，造成钢轨局部区域温度过高，在钢轨腰部出现过烧、氧化和晶界熔化，并在该区域的组织中出现魏氏体组织，导致在轧制过程中轨腰处出现纵向裂纹。
裂纹
加热过烧
Rail
Crack
Overburning
Abstract
The longitudinal cracks of rail web which appeared during heating rail. The cracks have been analyzed by means of chemical composition analysis,JSM-5600LV scanning electron microscope inspection,INCA quantitative electron microanalysis and optical microscope examination. The results showed that the high temperature caused by heterogeneous heating on web during shaped rail machining had induced to overburning,cracks,grain boundary melting,and widmanstatten microstructure occurred at rail web.
中图分类号 U213.4
所属栏目 质量控制与失效分析
基金项目
收稿日期 2005/7/13
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备注吴雄先(1951-)，男，高级工程师。
引用该论文: WU Xiong-xian. ANALYSIS ON WORKING CRACKING OF RAIL[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2007, 43(2): 97～99
吴雄先. 钢轨加工开裂原因分析[J]. 理化检验－物理分册, 2007, 43(2): 97～99
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参考文献
【1】崔约贤,王长利.金属断口分析［M］.哈尔滨:工业大学哈尔滨出版社,1998.212-213．
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