摘要
针对现役某车辆拖车钩存在强韧性不足导致拖车钩牵引拉脱的问题,通过优化拖车钩结构和材料两方面增加拖车钩自身及连接部位的强韧性。采用有限元软件HyperWorks对拖车钩施加不同工况载荷进行模拟验证,对载荷卸载后的拖车钩残余变形量进行分析,分析表明,优化后的拖车钩较原状态的残余变形量降低,拖车钩的屈服强度有所提升,采用热处理方式可提升拖车钩用40CrMo钢材料的冲击韧性。研究了淬火后回火保温时间对40CrMo钢组织性能的影响,试验结果表明,热处理工艺为790℃淬火+560℃回火,材料的冲击韧性随着回火保温时间的延长而提升。
In order to improve the strength and toughness of the trailer coupler and its connecting parts,the structure of the trailer coupler and the material of the trailer coupler are optimized.Using the finite element software HyperWorks to simulate and verify the trailer coupler under different working conditions,and to analyze the residual deformation of the trailer coupler after unloading.The analysis shows that the residual deformation of the optimized trailer coupler is lower than that of the original one,and the yield strength of the structure of the trailer coupler is improved.The impact toughness of 40CrMo steel for trailer coupler can be increased by heat treatment.The effect of tempering time after quenching on the microstructure and properties of 40CrMo steel is studied,the process of heat treatment is 790℃quenching+560℃tempering.The impact toughness of the material increases with the prolongation of tempering holding time.
作者
张延京
李俊英
ZHANG Yanjing;LI Junying(Shaanxi Fengrun Intelligent Manufacturing Research Institute Company Limited,Xi'an 712000,China;BYD Automobile Company Limited,Xi'an 710100,China)
出处
《汽车实用技术》
2023年第18期117-121,共5页
Automobile Applied Technology
关键词
拖车钩
有限元
屈服强度
回火保温时间
冲击吸收功
Toughness of the trailer coupler
Finite element
Yield strength
Tempering holding time
Impact absorption work
