Circumferential welding technique research of nickel-based alloy 690 buttering and safe-end

XIE Yanwu; ZHANG Lide

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Circumferential welding technique research of nickel-based alloy 690 buttering and safe-end
Vol. 49, Issue 4, Pages: 266-270(2019)
Published：2019
DOI：
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DOI：

XIE Yanwu, ZHANG Lide. Circumferential welding technique research of nickel-based alloy 690 buttering and safe-end[J]. Eletric Welding Machine2019, 49(4): 266-270. DOI：

摘要

针对镍基合金690材料的焊接特性——镍与杂志元素易形成低熔点共晶物而产生热裂纹和晶间失延裂纹

通过大量试验研究

从焊接电流、焊接电压、焊接速度、送丝速度及钨极形式方面进行分析控制

较好地避免了镍基合金690预堆边堆焊和安全端环缝焊接的热裂纹和侧壁的未熔合缺陷。试验工艺参数通过评定得到验证

成功应用于三门2#AP1000蒸发器预堆边堆焊和安全端环峰的焊接。

Abstract

According to the welding characteristics of nickel-based alloy 690

the welding current

welding voltage

welding speed

wire feeding speed and the form of tungsten pole are analyzed and controlled through a large number of experiments. The hot cracks and side wall unfusion defects of nickel-based alloy 690 pre-surfacing and safe end-ring welding are avoided. The test process parameters were validated and successfully applied to the welding of the pre-pile surfacing and the safety end ring of Sanmen 2#AP1000 evaporator.