Reasons for bolt elongation and fracture of a wheel
摘 要
某型号车轮螺栓在装配过程中出现拉长和断裂情况。采用宏观观察、化学成分分析、力学性能测试、硬度测试、金相检验、扫描电镜及能谱分析、摩擦性能测试等方法,分析了螺栓拉长和断裂的原因。结果表明:螺栓和螺母的扭矩系数一致性较差,在装配过程中,夹紧力超过螺栓屈服强度,导致螺栓拉长;当扭矩系数过小时,夹紧力超过螺栓的抗拉强度,导致螺栓断裂。
Abstract
The wheel bolts of a certain model were elongated and fractured during assembly. The causes of bolt elongation and fracture were analyzed by means of macroscopic observation, chemical composition analysis, mechanical property test, hardness test, metallographic examination, scanning electron microscope and energy spectrum analysis, friction performance test. The results show that the torque coefficients of bolts and nuts were not consistent. During the assembly process, the clamping force exceeded the yield strength of bolts, resulting in bolt elongation. When the torque coefficient was too small, the clamping force exceeded the tensile strength of the bolt, resulting in the bolt fracture.
中图分类号 TB31 TH131 DOI 10.11973/lhjy-wl202211018
所属栏目 质量控制与失效分析
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收稿日期 2022/5/23
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备注武坤(1995-),男,学士,助理工程师,主要从事金属材料理化检验及失效分析工作,1060528495@qq.com
引用该论文: WU Kun,YANG Fan,WANG Xiujian,LI Hao,ZHENG Xiping. Reasons for bolt elongation and fracture of a wheel[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2022, 58(11): 65~68
武坤,杨帆,王秀健,李皓,郑喜平. 某型号车轮螺栓拉长和断裂原因[J]. 理化检验-物理分册, 2022, 58(11): 65~68
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参考文献
【1】胡美些.金属材料失效分析基础与应用[M].北京:机械工业出版社,2017.
【2】郭若菡.汽车螺栓紧固件断裂失效的断口分析方法研究[D].大连:大连理工大学,2019.
【3】石祝竹,莫煜.扫描电镜(SEM)在失效分析中的应用[J].装备制造技术,2011(11):142-144.
【2】郭若菡.汽车螺栓紧固件断裂失效的断口分析方法研究[D].大连:大连理工大学,2019.
【3】石祝竹,莫煜.扫描电镜(SEM)在失效分析中的应用[J].装备制造技术,2011(11):142-144.
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