超声冲击处理对P265GH厚板焊接残余应力的影响
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摘要
为研究超声冲击(UIT)对P265GH钢厚板焊接接头残余应力的影响,制备50 mm厚对接焊试样,采用X射线衍射法(XRD)测试焊接接头经超声冲击前后的表层及沿深度残余应力分布。结果表明:经过超声冲击后,冲击区的表面拉伸焊态残余应力全部转变为压缩应力,其峰值达到熔敷金属的室温屈服强度;超声冲击对横向、纵向残余应力深度和幅值的结果基本一致,对冲击区外的原始残余应力影响不显著;超声冲击后的纵向压应力深度达到(1.9～2.5)mm,横向约为3.3 mm,且横向和纵向压缩应力峰值达到熔敷金属的屈服强度,在距表面约为0.8 mm处。
A butt-welded specimen with 50 mm thickness was prepared to investigate the effect of ultrasonic impact treatment(UIT)on the welding residual stress of thick P265 GH steel plate. The residual stress distributions on the surfaces and within a certain depth before and after the UIT were measured by the X-ray diffraction(XRD)method. The results show that,after UIT the welding residual stress on the surfaces within the impact zone are transformed from tensile stress into compressive stress and the peak value of the compressive stress reaches to the yield strength of the deposited metal at room temperature. UIT has the same effect on both transverse and longitudinal residual stresses and has little effect on the original stress outside of the impact zone. The depth of longitudinal compressive stress after UIT reaches to(1.9-2.5)mm and the depth of transverse compressive stress reaches to around 3.3 mm. The peak value of longitudinal and transverse compressive stress,which occurs at a depth of about 0.8 mm under the surface,reaches to the yield strength of deposited metal.
A butt-welded specimen with 50 mm thickness was prepared to investigate the effect of ultrasonic impact treatment(UIT)on the welding residual stress of thick P265 GH steel plate. The residual stress distributions on the surfaces and within a certain depth before and after the UIT were measured by the X-ray diffraction(XRD)method. The results show that,after UIT the welding residual stress on the surfaces within the impact zone are transformed from tensile stress into compressive stress and the peak value of the compressive stress reaches to the yield strength of the deposited metal at room temperature. UIT has the same effect on both transverse and longitudinal residual stresses and has little effect on the original stress outside of the impact zone. The depth of longitudinal compressive stress after UIT reaches to(1.9-2.5)mm and the depth of transverse compressive stress reaches to around 3.3 mm. The peak value of longitudinal and transverse compressive stress,which occurs at a depth of about 0.8 mm under the surface,reaches to the yield strength of deposited metal.
引文
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[15]杨秀利,刘文斌,胡因洪.核电承压设备用P265GH钢板焊接接头性能研究[J].武钢技术,2017(6):30-33.
[16]张清辉,杨艳萍,何金珊,等.核电站安全壳用P265GH钢板组织性能研究[J].金属制品,2013(3):54-58.
[17]LEGGATT R H. Residual stresses in welded structures[J].International Journal of Pressure Vessels&Piping,2008,85(3):144-151.
[18]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.
[2]WITHERS P J. Residual stress and its role in failure[J]. Reports on Progress in Physics,2007,70(12):2211-2264.
[3]李晨,楼瑞祥,王志刚,等.残余应力测试方法的研究进展[J].材料导报,2014(S2):153-158.
[4]WITHERS P J,BHADESHIA H K D H. Residual stress part 1-measurement techniques[J]. Materials Science and Technology,2001,17(4):355-365.
[5]HAIGH R D,HUTCHINGS M T,JAMES J A,et al. Neutron diffraction residual stress measurements on girth-welded 304stainless steel pipes with weld metal deposited up to half and full pipe wall thickness[J]. International Journal of Pressure Vessels and Piping,2013,101:1-11.
[6]BRAY D E. Ultrasonic stress measurement and material characterization in pressure vessels,piping,and welds[J]. Journal of Pressure Vessel Technology,2002,124:326-335.
[7]王香云,雷文娟.焊后热处理对12Cr1MoVG/12Cr2MoWVTiB钢焊接接头组织性能的影响[J].金属热处理,2011(6):92-96.
[8]顾邦平,赖金涛,胡雄,等.高频冲击振动对焊接残余应力的影响研究[J].铁道学报,2018(5):150-155.
[9]胡文浩,王广英,杨鑫华.高速动车组转向架构架焊接残余应力研究(三)[J].焊接技术,2018(3):19-22.
[10]江明明,何柏林.超声冲击对十字焊接接头表面形貌及应力集中系数的影响[J].兵器材料科学与工程,2017,40(6):10-13.
[11]何柏林,雷思涌.超声冲击对焊接残余应力影响的研究进展[J].兵器材料科学与工程,2015,38(2):120-123.
[12]MALAKI M,DING H. A review of ultrasonic peening treatment[J]. Materials and Design,2015,87:1072-1086.
[13]饶德林,陈立功,倪纯珍,等.超声冲击对焊接结构残余应力的影响[J].焊接学报,2005(4):48-50.
[14]KHURSHID M,LEITNERB M,BARSOUM Z,et al. Residual stress state induced by high frequency mechanical impact treatment in different steel grades-numerical and experimental study[J]. International Journal of Mechanical Sciences,2017,123:34-42.
[15]杨秀利,刘文斌,胡因洪.核电承压设备用P265GH钢板焊接接头性能研究[J].武钢技术,2017(6):30-33.
[16]张清辉,杨艳萍,何金珊,等.核电站安全壳用P265GH钢板组织性能研究[J].金属制品,2013(3):54-58.
[17]LEGGATT R H. Residual stresses in welded structures[J].International Journal of Pressure Vessels&Piping,2008,85(3):144-151.
[18]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.