预变形对304L焊接组织的影响

发布时间：2018-03-10 18:45

  本文选题：预变形　切入点：熔化极气体保护焊　出处：《材料工程》2017年01期 　论文类型：期刊论文

【摘要】：基于某汽车公司提出的曲面焊接设计需求,研究了变形对焊接组织的影响。选用熔化极气体保护焊在奥氏体不锈钢304L的T型接头和变形钢板上焊接,寻求合理的变形后焊接参数并观察变形对焊接组织的影响。得到合理焊接参数为焊枪速率4mm/s,送丝速率2.5m/min,电压1 7V。在T型和变形后焊接中,焊趾分别处于应变为0%,30%的区域,观察到变形后焊接件中熔化区和部分熔化区范围减小,焊接接头碳化物沉积和晶间铁素体数量减小。304L变形后焊接获得了更为均匀的接头组织。
[Abstract]:Based on the design requirements of curved surface welding proposed by an automobile company, the effect of deformation on the welding microstructure was studied. The welding of austenitic stainless steel 304L T-joint and deformed steel plate was carried out by using gas shielded electrode welding. To find out reasonable welding parameters after deformation and to observe the effect of deformation on welding microstructure, the reasonable welding parameters are obtained as follows: welding torch rate 4 mm / s, wire feeding rate 2.5 m / min, voltage 17 V. in T type and after deformation welding, the welding toe is in the region of 0% strain, 30% strain, respectively. It was observed that the range of melting zone and partial melting zone decreased, the carbide deposition of welded joint and the number of intergranular ferrite decreased after deformation. A more uniform joint structure was obtained after deformation.
【作者单位】： 上海交通大学材料科学与工程学院;东南大学材料科学与工程学院;
【分类号】：TG457.11
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本文编号：1594591