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Title:Failure analysis on fracture of SWCH10A steel plug in the assembling process
Authors: Jin Linkui Zhou Bin Huang Chiwei Zhu Zhibing Du Shuiming 
Unit: Guangdong Dongguan Quality Supervision Testing Center National Mold Product Quality Supervision and Inspection Center Zhuzhou CRRC Timlg Forge Co. Ltd.  
KeyWords: fibrous tissue  strips pearlite  stress cracking  dimple fracture  cleavage fracture 
ClassificationCode:TG147
year,vol(issue):pagenumber:2018,43(11):160-172
Abstract:

The chemical composition, surface hardness, fracture morphology and microstructure of SWCH10A steel plug rupture failure parts were detected and analyzed by spark discharge direct reading spectrometer, digital Vickers hardness tester, optical microscope and scanning electron microscope. The results show that the fracture surface of plug failure parts is formed in the groove of flange and screw junction, and the crack source starts at the surface of groove and the terminating region ends at the screw hole. On the surface of the flange hole and the screw hole, there is fibrous tissue of cold heading deformation that results in stress cracking cracks along the deformation streamline. Due to the rough machining on the groove surface of plug part, a great stress concentration exists on the rough surface marks, and the cracks are preferentially formed between the rough cut marks on the surface of groove to generate stress-concentrated multi-source step cracks. With the rotation of the screw tightening torque, the fracture extends along the Herringbone ring and eventually results in the fracture of the overall part. However, the deformed pearlite tape and stress cracking cracks on the surface of
parts improve the fracture expansion process further.

Funds:
广东省东莞市产学研合作项目(201550910500294)
AuthorIntro:
金林奎(1966-),男,硕士,高级工程师,E-mail:jinlinkui@foxmail.com
Reference:


[1]李登超.钢材质量检验
[M].北京:化学工业出版社,2008.


Li D C. Qality Ispection
[M].Beijing:Chemical Industry Press,2008.



[2]陈君才.金属构件的失效分析
[M].西安:成都科技大学出版社,1987.


Chen J C.Failure Analysis of Metal Components
[M].Xi′an:Chengdu University of Science and Technology Press,1987.



[3]程培源.模具寿命与材料
[M].北京:机械工业出版社,1999.


Cheng P Y.Die Life and Materials
[M].Beijing:Machinery Industry Press,1999.



[4]钟群鹏, 赵子华. 断口学
[M]. 北京: 高等教育出版社,2005.


Zhon Q P,Zhao Z H.Fracture
[M].Beijing:Higher Education Press,2005.



[5]马爱斌, 蒋建清.金属热处理及质量检验
[M].南京:东南大学出版社,2001.


Ma A B,Jiang J Q.Metal Heat Treatment and Quality Inspection
[M].Nanjing:Southeast University Press ,2001.



[6]林际熙,王美生,吴兴泉.金属力学性能检验
[M].北京:冶金工业出版社,1999.


Lin J X,Wang M S,Wu X Q.Metal Mechanical Properties Test
[M].Beijing:Metallurgical Industry Press,1999.



[7]张鲁阳.模具失效与防护
[M].北京:机械工业出版社,1998.


Zhang L Y.Mold Failure and Protection
[M].Beijing:Machinery Industry Press,1998.



[8]宋余九. 金属的晶界与强度
[M]. 西安: 西安交通大学出版社, 1987.


Son Y J.Metal Grain Boundaries and Strength
[M].Xi′an:Xi′an Jiaotong University Press,1987.



[9]GB/T 13299—1991,钢的显微组织评定方法
[S].


GB/T 13299—1991,Steel microstructure evaluation method
[S].



[10]孙盛玉, 戴雅康.热处理裂纹分析图谱
[M].大连:大连出版社,2002.


Sun S Y,Dai Y K.Heat Treatment Crack Analysis Map
[M].Dalian:Dalian Press ,2002.



[11]宋子濂,史建平,邹定强.车辆断裂失效分析图谱
[M].北京:中国铁道出版社,1995.


Son Z L,Shi J P,Zou D Q.Vehicle Failure Analysis of Failure
[M].Beijing:China Railway Press,1995.



[12]GB/T 6394—2017,金属平均晶粒度测定方法
[S].


GB/T 6394—2017,Method for determining the average grain size of metals
[S].



[13]赵德颖, 张连东, 朱恩领, 等.枝杈类锻件挤压过程折叠缺陷形成研究
[J].塑性工程学报, 2017,24(2):10-16.


Zhao D Y,Zhang L D,Zhu E L, et al.Folding defect formation of branch-type forgings during extrusion
[J].Journal of Plastic Engineering, 2017, 24(2): 10-16.



[14]李春胜, 黄德彬.金属材料手册
[M].北京:化学工业出版社,2005.


Li C S,Huang D B.Metallic Materials Handbook
[M].Beijing:Chemical Industry Press,2005.



[15]GB/T 6394—2017,金属平均晶粒度测定方法
[S].


GB/T 6394—2017,Method for determining the average grain size of metals
[S].



[16]史美堂.常用模具钢热处理性能
[M].上海:上海科学技术出版社,1981.


Shi M T.Common Mold Steel Heat Treatment Performance
[M].Shanghai:Shanghai Science and Technology Press,1981.



[17]郑学坊, 邱允新, 唐镇南.金相分析技术
[M].上海:上海科学技术出版社,1987.


Zheng X F,Qiu Y X,Tang Z N.Metallographic Analysis Technology
[M].Shanghai:Shanghai Science and Technology Press,1987.



[18]张栋,钟培德,陶春虎,等.失效分析
[M].北京:国防工业出版社.2003.


Zhang D,Zhon P D,Tao C H,et al.Failure Analysis
[M].Beijing:National Defense Industry Press,2003.



[19]孙一唐,李湘多,郑瑅.工具钢及其热处理
[M].北京:机械工业出版社.1986.


Sun Y T,Li X D,Zheng T.Tool Steel and Its Heat Treatment
[M].Beijing:Machinery Industry Press,1986.



[20]樊东黎, 徐跃明, 佟晓辉.热处理工程师手册
[M].北京:机械工业出版社,2004.


Fan D L,Xu Y M,Tong X H.Heat Treatment Engineer′s Handbook
[M].Beijing:Machinery Industry Press,2004.

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