The flame normalizing treatments were put forward on steel rail with flash welding, gas pressure welding and aluminium heat welding.
对钢轨闪光焊、气压焊和铝热焊进行火焰正火处理，并进行正火、未正火接头和钢轨母材的金相组织以及力学性能的对比。
They cause all the welding of double tubes, joint boxes and gas-collecting tubes to realize the backing weld of TAW-P. The quality of the double tube waste heat boilers have been improved.
并对喷嘴、规范参数、坡口形式等作了相应改进，使双套管、联箱、集气管的焊接全部实现了钨极氩弧焊打底，从而提高了双套管废热锅炉的质量。
In natural gas treatment plant, generally used is resistance heating method for heat treatment in welding lines of equipment and pipeline systems.
在天然气处理厂内对设备和管道系统焊缝的热处理一般采用电阻加热法。
In addition, improper heat treatment process and welding defects promotes the destruction trend in the gas turbine wheel.
另外，热处理工艺不当以及焊接缺陷是造成叶轮失效的促进因素。
The hardness of welded joints obtained by double-wire submerged arc welding is significantly better than that obtained by CO2 gas shielded. The peak hardness appears in the heat affected zone.
CO2气体保护焊接头的硬度值明显较双丝埋弧焊接头的硬度值高，硬度值在热影响区出现峰值。
Two combined welding processes for 65Mn high strength strip steel, including gas welding-forging and pressing-tempering and argon arc welding-heat treatment, are introduced in the paper.
研究气焊—锻压—热处理和氩弧焊—热处理两种复合工艺连接高强度钢带。
Two combined welding processes for 65Mn high strength strip steel, including gas welding-forging and pressing-tempering and argon arc welding-heat treatment, are introduced in the paper.
研究气焊—锻压—热处理和氩弧焊—热处理两种复合工艺连接高强度钢带。
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