为了研究焊接热输入对8万吨模锻压机主缸材料20MnNiMo焊接残余应力的影响,制定了不同热输入条件下的焊接方案,并通过盲孔法对残余应力进行了测定.实验结果表明,焊接接头残余应力的分布和大小是随着焊接热输入的减小而不断变化的.当焊接热输入由27.3 J/cm变化到24.6 J/cm时,焊接接头焊缝区x方向残余应力减小16％；热影响区x方向残余应力减小33％,y方向残余应力减小52％；焊缝区x方向残余应力减小49％,y方向残余应力增加49％；其中,焊接热输入的变化对y方向残余应力影响最大.在相同焊接效率条件下,焊接热输入越小,材料20MnNiMo的焊接残余应力越小.
参考文献
| [1] | 李承亮,张明乾.压水堆核电站反应堆压力容器材料概述[J].材料导报,2008(09):65-68. |
| [2] | 徐连勇,荆洪阳,周春亮,徐德录,韩钰.焊后热处理对P92钢管道焊接残余应力场的影响[J].焊接学报,2010(03):13-16. |
| [3] | 吴运祥.低合金高强钢焊接构件在高温锅炉水中的应力腐蚀开裂行为研究[J].压力容器,2010(06):1-6,20. |
| [4] | 贺启良,马东溟.焊接工艺参数对焊接残余应力的影响[J].材料研究与应用,2010(01):75-77. |
| [5] | 张显辉.20MnNiMo钢焊接热影响区的组织和韧性及其氢致裂纹特征[J].焊接学报,2000(01):9. |
| [6] | 张显辉,谭长瑛,陈佩寅.焊接接头氢扩散数值模拟（I）[J].焊接学报,2000(03):51-54. |
| [7] | 张显辉,焦伟,谭长瑛.20MnNiMo钢焊接氢致裂纹特征（Ⅱ）[J].焊接学报,2002(03):23-25. |
| [8] | Park DG.;Kim IS.;Kim HC.;Hong JH. .EVALUATION OF THERMAL RECOVERY OF NEUTRON-IRRADIATED SA508-3 STEEL USING MAGNETIC PROPERTY MEASUREMENTS[J].Journal of Materials Science,1997(23):6141-6146. |
| [9] | 周方明,王江超,周涌明,张军.提高小孔法测量焊接残余应力精度的研究[J].热加工工艺,2007(15):67-69. |
| [10] | Pagliaro P;Zuccarello B .Residual stress analysis of orthotropic materials by the through-hole drilling method[J].Experimental Mechanics,2007(2):217-236. |
| [11] | D. Akbari;I. Sattari-Far .Effect of the welding heat input on residual stresses in butt-welds of dissimilar pipe joints[J].International Journal of Pressure Vessels and Piping,2009(11):769-776. |
| [12] | Kiyoshima, S;Deng, D;Ogawa, K;Yanagida, N;Saito, K .Influences of heat source model on welding residual stress and distortion in a multi-pass J-groove joint[J].Computational Materials Science,2009(4):987-995. |
| [13] | Lin Y C;Lee K H .Effect of welding parameters on the residual stress by the parallel heat welding[J].International Journal of Pressure Vessels and Piping,1997,71(02):197-202. |
| [14] | R. H. Leggatt .Residual stresses in welded structures[J].International Journal of Pressure Vessels and Piping,2008(3):144-151. |
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