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采用具有可分区间、电流区间渐变特性的TIG管焊机,使用不锈钢活性剂对8 mm厚的304不锈钢管进行平位置焊接工艺试验。考虑到焊缝成形受焊接热积累和熔池受力状态的共同影响,通过大量试验和分析熔池的受力,制定了最佳焊接工艺参数。试验结果表明:焊缝熔深增加了3倍,外表面平整,内表面成形均匀,焊缝内部余高小于1.5 mm,焊缝经X射线探伤检验、拉伸试验、弯曲试验、接头压扁试验等检验均为合格。使用该方法焊件之间不留间隙,不开破口,可以一次焊透,并能单面焊双面成形。突破了传统管道焊接的焊接工艺,具有高效率、低耗材、低成本等特点。
A TIG tube welding machine with separable interval and current interval gradient was used to test the flat position welding process of 8 mm thick 304 stainless steel tube by using stainless steel active agent. Considering that the welding seam formation is affected by the heat accumulation of welding and the stress state of the weld pool, the optimum welding process parameters are worked out through a large number of experiments and analysis of the force of the weld pool. The test results show that the welding penetration increases 3 times, the outer surface is smooth, the inner surface is formed uniformly, the residual height of the weld is less than 1.5 mm. The weld is tested by X-ray, tensile test, bending test and joint flattening test Other tests are qualified. Using this method there is no gap between the weldments, not broken, can be a penetration, and double-sided welding can be formed. Break through the traditional pipe welding welding process, with high efficiency, low supplies, low cost and so on.