THE CRACKING ANALYSIS FOR AT SWITCH RAIL

WU Xiong-xian; WANG fei-long; JIANG Ren-gui

WU Xiong-xian, WANG fei-long, JIANG Ren-gui. THE CRACKING ANALYSIS FOR AT SWITCH RAIL[J]. PHYSICAL TESTING AND CHEMICAL ANALYSIS PART A:PHYSICAL TESTING, 2007, 43(6): 307-310.

Citation:

WU Xiong-xian, WANG fei-long, JIANG Ren-gui. THE CRACKING ANALYSIS FOR AT SWITCH RAIL[J]. PHYSICAL TESTING AND CHEMICAL ANALYSIS PART A:PHYSICAL TESTING, 2007, 43(6): 307-310.

Citation:

WU Xiong-xian, WANG fei-long, JIANG Ren-gui. THE CRACKING ANALYSIS FOR AT SWITCH RAIL[J]. PHYSICAL TESTING AND CHEMICAL ANALYSIS PART A:PHYSICAL TESTING, 2007, 43(6): 307-310.

THE CRACKING ANALYSIS FOR AT SWITCH RAIL

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Crack appears when AT switch rail is being made. The results are checked by chemical analysis,macroscopic examination,metallographic examination,and impurity examination. Analyzing indicates that its chemical constitution meets the standard requirement,and its macroscopic structure and metallurgical structure is normal. But the improper distance between induction coil and switch rail,led partial area of excessive high temperature when heatings by induction,which cause overburnt,overheat and shattered crack. The crack further grew during the subsequent forging process and formed bigger crack in the rail-web (lower) area.

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THE CRACKING ANALYSIS FOR AT SWITCH RAIL

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