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电杆工程车的动臂(包括伸缩臂)系焊接结构件。结构尺寸大,焊接质量要求高。经过一个阶段的焊接实践,对焊接过程中的几个主要问题略有认识,现介绍如下: 一、焊接材料的选择工程车动臂材料均为16Mn。从成分看,属于低炭钢,但其炭当量约为0.43%,相当于中炭钢。其机械性能和淬硬性都比三号钢高,产生焊接裂纹的倾向也比三号钢大。动臂焊接件所用板材厚度为6毫米,焊缝为角焊缝。由于焊件的厚度较小,焊接时不会产生三向应
Electric boom engineering boom (including telescopic arm) Department of welded structural parts. Structure size, high welding quality requirements. After a stage of welding practice, the welding process a few major problems a little understanding, are introduced as follows: First, the choice of welding materials Engineering vehicle boom materials are 16Mn. From the composition of view, are low carbon steel, but its carbon equivalent is about 0.43%, equivalent to the carbon steel. Its mechanical properties and hardenability are higher than the No. 3 steel, tend to produce welding cracks larger than the No. 3 steel. The thickness of the plate used for the boom welding is 6 mm and the weld is the fillet weld. Due to the smaller thickness of the weldment, welding will not produce three-way should