Fracture cause analysis of W6Mo5Cr4V2Al high speed steel twist drill

doi:10.13251/j.issn.0254-6051.2021.07.044

Abstract

Abstract: Fracture causes of W6Mo5Cr4V2Al high speed steel (HSS) twist drill were studied by means of chemical composition examination, OM, SEM and EDS. The results show that the overheating and overburning of the twist drill caused in the heat treatment processes lead to grain boundary melting, eutectic ledeburite and a large number of reticulated carbides in the matrix, and high tensile stress formed on the drill surface in the cooling process leads to intergranular crack to appear when the stress is higher than the fracture strength of the material, finally the action of external force in the subsequent correction process causes the fracture of the drill.

Key words: high speed steel, overheating, overburning, intergranular crack, fracture

CLC Number:

TG157

Song Quan, Dan Ting, Li Xiaoguang, Gao Mingsen, Cao Huihui. Fracture cause analysis of W6Mo5Cr4V2Al high speed steel twist drill[J]. Heat Treatment of Metals, 2021, 46(7): 229-232.

References

[1] 邓玉昆, 陈景榕, 王世章. 高速工具钢[M]. 北京: 冶金工业出版社, 2002.
[2] 赵先锐, 冯尚申, 李勤涛, 等. 高速钢刀具常见材料失效典型案例分析[J]. 热加工工艺, 2013, 42(18): 189-191.
Zhao Xianrui, Feng Shangshen, Li Qintao, et al. Analysis on typical material failure cases of high speed steel cutting tool[J]. Hot Working Technology, 2013, 42(18): 189-191.
[3] 钟群鹏, 赵子华. 断口学[M]. 北京: 高等教育出版社, 2005: 197-200.
[4] 程书海, 赵益洛, 胡寒婷. 17CrNiMo6钢锭锻裂分析[J]. 大型铸锻件, 2017(6): 44-46.
Cheng Shuhai, Zhao Yiluo, Hu Hanting. Fracture analysis of 17CrNiMo6 steel ingot[J]. Heavy Castings and Forgings, 2017(6): 44-46.
[5] 龚丹梅, 袁鹏斌, 余世杰, 等. S135 钢级钻杆管体断裂原因分析[J]. 金属热处理, 2013, 38(7): 118-121.
Gong Danmei, Yuan Pengbin, Yu Shijie, et al. Fracture analysis of S135 grade steel drill pipe body[J]. Heat Treatment of Metals, 2013, 38(7): 118-121.
[6] 马瑞, 陈希春, 金林奎, 等. 8418钢铝合金压铸模早期开裂失效分析[J]. 金属热处理, 2020, 45(3): 235-239.
Ma Rui, Chen Xichun, Jin Linkui, et al. Failure analysis of early cracking of aluminum alloy casting die made of 8418 steel[J]. Heat Treatment of Metals, 2020, 45(3): 235-239.
[7] 赵步青, 胡会峰. 高速钢热处理失误典型案例[J]. 热处理技术与装备, 2019, 40(5): 33-36.
Zhao Buqing, Hu Huifeng. Typical cases of heat treatment failure for high speed steel[J]. Heat Treatment Technology and Equipment, 2019, 40(5): 33-36.
[8] 杨仁山. 高速钢淬火过烧金相组织形态分析[J]. 热加工工艺, 1987, 16(3): 60-64.
[9] 朱杰武. 高速钢过热与过烧组织讨论[J]. 汉中师范学院学报(自然科学), 1996(3): 23-28.
Zhu Jiewu. A discussion on the superheat and overheat microstructures of high-speed steel[J]. Journal of Hanzhong Teachers College(Natural Science), 1996(3): 23-28.
[10] 王国栋, 张作贵, 刘俊亮. 37CrMnMo4钻杆接头缺陷分析[J]. 物理测试, 2009, 27(6): 58-62.
Wang Guodong, Zhang Zuogui, Liu Junliang. Defects analysis on 37CrMnMo4 drill pipe joints[J]. Physics Examination and Testing, 2009, 27(6): 58-62.
[11] 解念锁, 杨仁山, 王瑾. 含碳量对高速钢淬火过热过烧组织形态的影响[J]. 陕西工学院学报, 1996, 12(1): 69-73.
Xie Niansuo, Yang Renshan, Wang Jin. The effect of carbon contents on the structure and morphology of overheating and burning in quenched high speed steel[J]. Journal of Shaanxi Institute of Technology, 1996, 12(1): 69-73.
[12] 胡德林, 张建国, 张帆, 等. Cr12MoV钢锻造过热过烧及对最终组织和性能影响研究[J]. 热加工工艺, 1994(5): 5-8.
Hu Delin, Zhang Jianguo, Zhang Fan, et al. The effects of overheating and overburning treatment on the microstructure and mechanical properties of final heat treatment in the Cr12MoV steel[J]. Hot Working Technology, 1994(5): 5-8.

[1]	Chen Dongjun, Li Guangyang, Liu Gang. Effect of aging treatment on microstructure and mechanical properties of AlSi9Cu3 HPDC aluminum alloy [J]. Heat Treatment of Metals, 2022, 47(4): 53-56.
[2]	Li Mingxiang, Yang Ping, He Wei, Zhang Meng, Wang Wenbo. Failure analysis of hydrogen induced delayed fracture of 50CrVA steel spring [J]. Heat Treatment of Metals, 2022, 47(3): 257-260.
[3]	Yang Yuchuan, Li Wei, Xiong Yong. Analysis of fracture cause of 1Cr17Ni2 steel small shaft of control box [J]. Heat Treatment of Metals, 2022, 47(3): 261-265.
[4]	Li Dejun, Gao Hua, Kong Xianglu, Yang Xiaoping, Li Ta, Dong Zhaoyuan, Zhang Xiaojia. Failure analysis of 20 steel equal-diameter tee [J]. Heat Treatment of Metals, 2022, 47(2): 262-266.
[5]	Li Liangjun, Zhang Jiamin, Chi Hongxiao, Zhou Jian. Effect of Co microalloying on microstructure and properties of M2 high speed steel [J]. Heat Treatment of Metals, 2022, 47(1): 73-78.
[6]	Zhao Xiaojun, Liang Xiao, Cai Zhenyang, Xiao Lairong. Effect of aluminizing and oxidation treatment on microstructure and mechanical properties of CLAM steel [J]. Heat Treatment of Metals, 2022, 47(1): 192-196.
[7]	Li Liangjun, Zhang Jiamin, Chi Hongxiao, Zhou Jian. Influence of heat treatment process on microstructure and properties of M2 high speed steel [J]. Heat Treatment of Metals, 2021, 46(9): 72-78.
[8]	Wu Hao, Deng Xiangtao, Li Chengru, Sui Yi, Zhang Tao, Ji Wenbo, Wang Zhaodong. Analysis on cold bending fracture of wear-resistant steel NM400 [J]. Heat Treatment of Metals, 2021, 46(9): 262-267.
[9]	Xu Qihao,Yang Lilin, Xia Ming, Qin Chen, Geng Zhenyue, Jiang Yajun, Zhao Liping. Failure analysis of 38CrMoAlA steel driveshaft [J]. Heat Treatment of Metals, 2021, 46(9): 268-272.
[10]	Nie Xiaolong, Gao Jiaqiang, Meng Kairen, Wang Junyi, Liu Xinkuan. Fracture failure analysis of 60Si2Mn spring steel [J]. Heat Treatment of Metals, 2021, 46(8): 246-249.
[11]	Jia Dongsheng, Hong Zhenjun, Wang Xiaohai, Wang Maoqiu, Mao Lu, Zhang Ruijun. Effect of nitrogen-methanol atmosphere on hydrogen-induced fracture of45CrNiMoVA high strength steel [J]. Heat Treatment of Metals, 2021, 46(7): 233-237.
[12]	Xie Zengxiao, Huang Yijun, Zhang Yufei, Lou Yumin, Pu Xianchao. Fracture analysis of self sealing tension bolt of high pressure regulating valve [J]. Heat Treatment of Metals, 2021, 46(7): 242-248.
[13]	Lin Wenqin, Lu Han, Xu Xinjie, Yang Yuanxi, Deng Feng, Wu Jiaxin. Fracture reason analysis and improvement measures of binaural plate screw [J]. Heat Treatment of Metals, 2021, 46(7): 249-253.
[14]	Ji Guoqiang, Ge Guiming, Yu Lijuan, Zhong Jizhi. Analysis on cracking of 50CrV4 steel washer [J]. Heat Treatment of Metals, 2021, 46(7): 254-257.
[15]	Chen Shuisheng, Feng Mang, Yang Zhibo. High temperature formability and microstructure of 7075-T6 aluminum alloy [J]. Heat Treatment of Metals, 2021, 46(6): 191-194.