Residual stress comparison of cast iron cylinder head of engine before and after heat treatment
摘 要
采用压痕应变法、全释放应变法和深孔(DHD)法分别检测两种材料4种型号的发动机铸铁气缸盖在热处理前后的残余应力,分析了热处理消除气缸盖残余应力的效果。结果表明:通过压痕应变法和全释放应变法测得热处理前后气缸盖表面的残余应力基本为压应力,两种方法测得的残余应力水平相当,除3号气缸盖外,其余气缸盖热处理后的表面压应力峰值基本没有下降;通过DHD法测得气缸盖深度方向存在拉应力,热处理工艺没有降低气缸盖深度方向的拉应力峰值;3号气缸盖可以采用热处理工艺消除表面残余应力,其余气缸盖热处理前残余应力的水平较低,无需进行热处理。
Abstract
The indentation strain-gage method, the sectioning relaxation strain-gage method and the deep-hole drill (DHD) method were used to detect the residual stress of four types of the cast iron cylinder head in two materials of engine before and after heat treatment. The effect of heat treament to eliminate the residual stress of cylinder head. The results showed that the residual stress on the surface of cylinder head measured by indentation strain-gage method and sectioning relaxation strain-gage method was basically compressive stress. The residual stress levels measured by the two methods were similar, except for no. 3 cylinder head, the peak value of surface compressive stress of other cylinder heads had not decreased. The tensile stress in the depth direction of cylinder head was measured by DHD method, and heat treatment process did not reduce the peak value of tensile stress in the depth direction of cylinder head. The heat treatment process could be used for no. 3 cylinder head to eliminate surface residual stress, and the residual stress level of remaining cylinder heads before heat treatment were relatively low, no need for heat treatment.
中图分类号 TG156.23 DOI 10.11973/lhjy-wl202201003
所属栏目 试验与研究
基金项目
收稿日期 2020/11/10
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备注陈静(1976-),女,副研究员,主要从事焊接接头质量控制工作,cj@imr.ac.cn
引用该论文: LIU Qingyi,JIANG Ailong,CHEN Jing,CHEN Huaining,LI Dongxu. Residual stress comparison of cast iron cylinder head of engine before and after heat treatment[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2022, 58(1): 8~10
刘庆义,姜爱龙,陈静,陈怀宁,李东旭. 发动机铸铁气缸盖热处理前后的残余应力对比[J]. 理化检验-物理分册, 2022, 58(1): 8~10
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参考文献
【1】孟令春.考虑铸造残余应力的柴油机气缸盖有限元分析[D].北京:北京理工大学,2016.
【2】王国庆,贾宝全,张智超.热处理消除Q235钢焊接残余应力机理的研究[J].焊接技术,2011,40(10):56-57.
【3】张洋,龚宪生.发动机缸盖残余应力的测量及分析[J].机械科学与技术,2013,32(2):274-278.
【4】陈静,阚盈,姜云禄,等.压痕应变法应力计算常数的数值模拟[J].焊接学报,2019,40(1):147-150,167.
【5】SMITH D J,BOUCHARD P J,GEORGE D.Measurement and prediction of residual stresses in thick-section steel welds[J].The Journal of Strain Analysis for Engineering Design,2000,35(4):287-305.
【6】WIMPORY R C,MAY P S,O'DOWD N P,et al。Measurement of residual stresses in T-plate weldments[J].The Journal of Strain Analysis for Engineering Design,2003,38(4):349-365.
【7】廖凯,刘义鹏,常星宇,等.深孔法技术在铝合金构件应力场测试中的应用[J].中国有色金属学报,2015,25(11):3107-3112.
【2】王国庆,贾宝全,张智超.热处理消除Q235钢焊接残余应力机理的研究[J].焊接技术,2011,40(10):56-57.
【3】张洋,龚宪生.发动机缸盖残余应力的测量及分析[J].机械科学与技术,2013,32(2):274-278.
【4】陈静,阚盈,姜云禄,等.压痕应变法应力计算常数的数值模拟[J].焊接学报,2019,40(1):147-150,167.
【5】SMITH D J,BOUCHARD P J,GEORGE D.Measurement and prediction of residual stresses in thick-section steel welds[J].The Journal of Strain Analysis for Engineering Design,2000,35(4):287-305.
【6】WIMPORY R C,MAY P S,O'DOWD N P,et al。Measurement of residual stresses in T-plate weldments[J].The Journal of Strain Analysis for Engineering Design,2003,38(4):349-365.
【7】廖凯,刘义鹏,常星宇,等.深孔法技术在铝合金构件应力场测试中的应用[J].中国有色金属学报,2015,25(11):3107-3112.
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