摘要
介绍了换热器高压壳体环缝的预热焊丝窄间隙埋弧焊、冷裂纹及再热裂纹敏感性较大的厚大锻件20MnMo下封头与20MnMoNb底部四通的焊接及密封阀座斯太利硬质合金堆焊的工艺。
This paper describes the preheated wire narrow gap SAW procedure for circum ferential welds of high pressure shell of heat exchanger, and the welding procedure for circum ferential welds of high susceptibility to cold cracks and reheating cracks between heavy forged piece 20MnMo bottom head and 20MnMoNb bottom double tee, and the surfacing procedure for building up stellite on sealing valve seat.
出处
《焊接》
1999年第7期24-27,共4页
Welding & Joining
关键词
换热器
高压外壳
焊接
multi- layer structure, narrow gap Welding, cracks, stellite
