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首页> 外文期刊>Journal of Manufacturing Processes >Investigations on induced residual stresses, mechanical and metallurgical properties of CO_2 laser beam and pulse current gas tungsten arc welded SMO 254
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Investigations on induced residual stresses, mechanical and metallurgical properties of CO_2 laser beam and pulse current gas tungsten arc welded SMO 254

机译：对诱导残余应力的研究，CO_2激光束和脉冲电流钨弧焊SMO 254的诱导残余应力，机械和冶金性能

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摘要

This research article focuses on the joining of SMO 254 stainless steel by autogenous CO2 Laser beam welding and pulsed current gas tungsten arc welding (PCGTAW) with ERNiCrMo3 filler. The studies proved that full penetration could be achieved on the weld joint of a 5 mm thick plate with a reduced heat input of 120 J/mm in the laser welding while in the case of PCGTAW it was 3032 J/mm. An attempt is made to do a comparative evaluation of the microstructure changes which have occurred owing to welding and thereby the mechanical properties. The studies revealed the lack of deleterious phases in both welding techniques. Presence of grain boundary thickening near the fusion zone and elemental segregation was observed in PCGTAW joints. The residual stress measurements by X-ray diffraction method were executed over the cross-section of the two different weldments. An attempt is made to represent the stresses variation along the weld region, heat affected zone and the base metal graphically. The tensile test validated that in every case the rupture ensued at the base metal and the higher weldment hardness than base metal proves the soundness of the joint.
机译：本研究文章通过Ennicrmo3填充物通过自动CO2激光束焊接和脉冲电流钨弧焊（PCGTAW）的加入SMO 254不锈钢的连接。该研究证明，在5 mm厚板的焊接接头上可以实现完全渗透，在PCGTAW的情况下，在激光焊接中的120 j / mm的热量减少，在PCGTAW的情况下为3032 J / mm。尝试做出对由于焊接而发生的微观结构变化的比较评估，从而进行机械性能。研究表明，焊接技术中缺乏有害阶段。在PCGTAW关节中观察到融合区和元素偏析附近的晶界的存在。在两个不同焊接的横截面上执行X射线衍射方法的残余应力测量。尝试代表沿着焊接区域，热影响区域和基础金属的应力变化。验证的拉伸试验在每种情况下，在基础金属和较高的焊接硬度方面都比贱金属的破裂证明了接头的声音。

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