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《Heat Treatment Technology and Equipment》 2011-02
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Fracture Analysis of 20MnTiB High Strength Bolt

ZHANG Jian-guo(China Railway Baoji Bridge Group Co.,Ltd.,Baoji Shanxi 721006,China)  
The reason of fracture is analyzed by chemical composition examination,mechanical properties test,microstructure examination,macro and micro observation on the surface of fracture and thread of 20MnTiB high strength bolts.The results show that 1st thread tooth root′s surface defect arising from forming stage of the thread rolling is the primary cause of the break.
【Key Words】: high strength bolt fracture thread rolling defect
【CateGory Index】: TG115
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【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 ZHU Bingkun,ZHANG Chengjie,OU Changchun, LU Xiaosheng (LuoYang Ship building Material Institute,LuoYang 471039,China);Microstructures and properties of simulated heat-affected zones of 06CuNiCrMoNb age hardening steel[J];Ordnance Material Science and Engineering;2001-06
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1 Lei Yuanyuan~(1,2),Liang Yilong~(1,2),Tian Qin~(1,2)(1.College of Materials Science and Metallurgy Engineering, Guizhou University,Guiyang 550003,China;2.The Key Laboratory of Material Structure and Strength of Guizhou Province,Guiyang 550003,China);A Preliminary Exploration of Heating Treatment of Steel Wire Surface by Laser and High Frequency Induction[A];[C];2008
2 DING Zhi-min WANG Shu-juan YANG Fang YAN Ying (College of Materials Science and Engineering,Dalian Jiaotong University,Dalian 116028,China);Microstructure of high manganese steel during low-temperature aging treatment[A];[C];2007
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