由于激光焊蜂窝夹套的特殊制造工艺及其新颖结构，需对其进行一个系统的实验研究和理论分析(主要是有限元数值模拟分析)。
Due to the special manufacture craft and the new structure of laser welded dimple-plate jacket, it is necessary to be studied by experimental and theory analysis (mainly finite element analysis).
扁平绕带式低温高压容器是一种新型低温液体贮存设备，由内外两层容器组成，内筒体的外壁焊有液氮预冷夹套。
Cryogenic high-pressure vessel wound by flat metal strip with a liquid nitrogen precooling jacket is a new fashion adiabatic equipment, which consists of inter vessel and outer vessel.
焊接过程电弧稳定，焊接接头熔合良好，未见裂纹、 未焊透、夹渣、气孔等缺陷。
This process showed a stable arc, good welding joints without any gas pores and cracks.
其次，本文研究了钎缝中未焊合、孔洞、夹渣、溶蚀以及金属间氧化物等缺陷的产生原因及控制因素。
Thirdly, the causes of defects and the controlling factors of the seam such as gap, porosity, slag, corrosion and metal oxides was discussed in this paper.
从现场施工情况分析，焊接的内部缺陷主要有未焊透、未熔合、夹渣和气孔等几种。
Based on the analysis of site welding, the main welding defects are lack penetration, lack fusion, slag inclusion and porosity.
手工组焊，手工作业，焊接工整性欠佳，易产生气孔夹渣。
Manual welding, manual welding, neat poor, easy to produce porosity slag.
不锈钢管件的定位焊起弧和结尾处应圆滑过渡，焊道不能太高，必须保证熔合良好，以防产生未焊透、夹渣等缺陷。
The positioning welding stainless steel pipe shall be smooth transition arc and weld end, can not be too high, must ensure good fusion, produce unweld, slag and other defects in case.
为避免夹渣的产生，在焊接P91焊口时，宜采用焊接工艺评定电流上限焊接。
In order to decrease weld defect, the upper limit welding current should be adopted.
为避免夹渣的产生，在焊接P91焊口时，宜采用焊接工艺评定电流上限焊接。
In order to decrease weld defect, the upper limit welding current should be adopted.
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