机加工与热处理的连续加工残余应力耦合情况研究
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摘要
机加工选用工程上常用的铣削和刨削工艺,热处理选用淬火工艺。先对试样分别进行机加工和热处理,然后测试这些试样的残余应力,再对试样进行机加工、热处理连续加工,将其残余应力与之前单工艺的残余应力进行对比,从而了解残余应力的耦合情况。结果表明:在靠近试样两端面的位置,机加工热处理连续加工耦合残余应力和单独热处理残余应力差值较大;铣削淬火连续加工残余应力与铣削淬火叠加残余应力的比值为58.1%左右,刨削淬火连续加工残余应力与刨削淬火叠加残余应力的比值为78.25%左右,该比值可为今后计算连续加工残余应力提供参考。
The milling and planing technology commonly used in engineering was selected for machining and the quenching technology was selected for heat treatment. The samples were machined and heat treated respectively, and the residual stress of the specimens was measured. After machining and heat treatment sequential process, the residual stress of the sample was compared with that of the former single process, so that the coupling of residual stress could be understood. The results show that, the difference between the coupling residual stress in machining, heat treatment and the residual stress in single heat treatment is larger at the position near the two ends of the specimen. The ratio of residual stress in milling,quenching continuous process to superposition residual stress in milling and quenching is about 58.1%. The ratio of the residual stress in the continuous planing, quenching to the superposition residual stress in the plane and quenching is about78.25%. This ratio can provide reference for future calculation of residual stresses in continuous processing.
The milling and planing technology commonly used in engineering was selected for machining and the quenching technology was selected for heat treatment. The samples were machined and heat treated respectively, and the residual stress of the specimens was measured. After machining and heat treatment sequential process, the residual stress of the sample was compared with that of the former single process, so that the coupling of residual stress could be understood. The results show that, the difference between the coupling residual stress in machining, heat treatment and the residual stress in single heat treatment is larger at the position near the two ends of the specimen. The ratio of residual stress in milling,quenching continuous process to superposition residual stress in milling and quenching is about 58.1%. The ratio of the residual stress in the continuous planing, quenching to the superposition residual stress in the plane and quenching is about78.25%. This ratio can provide reference for future calculation of residual stresses in continuous processing.
引文
[1]米谷茂.残余应力的产生和对策[M].北京:机械工业出版社,1983.
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[4]迟陆鑫,陈重毅,麻永林,等.焊后热处理对特厚板20MnNiMo焊接残余应力的影响[J].材料热处理学报,2012,33(4):96-99.
[5]马思群,袁永文,冯良波,等.焊接速度对铝合金多道焊焊接残余应力影响研究[J].铁道学报,2014,36(1):16-21.
[6]苍松,马思群,金辉,等.基于SYSWELD的焊接工艺参数对多道焊焊接残余应力的影响[J].制造业自动化,2015,37(7):21-23.
[7]蒋文春,王炳英,巩建鸣.焊接残余应力在热处理过程中的演变[J].焊接学报,2011,32(4):45-48.
[8]韦智元,刘玉君,李瑞,等.基于数值计算的切割焊接连续加工残余应力演变过程[J].计算机集成制造系统,2013,19(9):2244-2250.
[9]虞付进,张克华.超声检测表面残余应力的研究与发展[J].表面技术,2007,36(4):72-75.
[10]全国热处理标准化技术委员会.钢件的正火与退火:GB/T16923-2008[S].北京:中国标准出版社,2008.
[2]Wozney G P,Crawmer G R.An investigation of vibrational stress relief in steel[M].New York:Defense Technical Information Center,1968.
[3]陈逸飞,张销鸿,陈辉,等.基于ABAQUS有限元计算的Al-Mg-Zn铝合金多层焊残余应力预测[J].热加工工艺,2017,46(3):230-234.
[4]迟陆鑫,陈重毅,麻永林,等.焊后热处理对特厚板20MnNiMo焊接残余应力的影响[J].材料热处理学报,2012,33(4):96-99.
[5]马思群,袁永文,冯良波,等.焊接速度对铝合金多道焊焊接残余应力影响研究[J].铁道学报,2014,36(1):16-21.
[6]苍松,马思群,金辉,等.基于SYSWELD的焊接工艺参数对多道焊焊接残余应力的影响[J].制造业自动化,2015,37(7):21-23.
[7]蒋文春,王炳英,巩建鸣.焊接残余应力在热处理过程中的演变[J].焊接学报,2011,32(4):45-48.
[8]韦智元,刘玉君,李瑞,等.基于数值计算的切割焊接连续加工残余应力演变过程[J].计算机集成制造系统,2013,19(9):2244-2250.
[9]虞付进,张克华.超声检测表面残余应力的研究与发展[J].表面技术,2007,36(4):72-75.
[10]全国热处理标准化技术委员会.钢件的正火与退火:GB/T16923-2008[S].北京:中国标准出版社,2008.