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LF合金用TIG焊应属可焊性较好的一种。但由于受人员、环境、设备、规范和辅料的影响,很难做到焊后接头无缺陷。特别是气孔,氧化夹渣是这种焊接材料的“常见病”和“多发病”。为了减少和防治它们,除了按常规采取一般工艺、冶金措施外,更重要的是要深入现场,摸索特殊的实际”临床”经验,使焊接接头完全符合QJ173—75的要求。
LF welding TIG welding should belong to a better solderability. However, due to the influence of personnel, environment, equipment, norms and excipients, it is very difficult to make the welded joint without defects. Especially stomatal, oxidation slag is the “common disease” and “frequently-occurring disease” of such welding materials. In order to reduce and prevent them, in addition to taking general process and metallurgical measures as usual, it is more important to go deep into the field and explore the special practical “clinical” experience so that the welded joint can fully meet the requirements of QJ173-75.