对间断焊焊接接头的金相分析表明其金相组织正常，内压试验结果表明该结构能安全运行。
The metallographic analysis shows that the metallurgical structure is proper. The results of internal pressure test indicate that the hot tap structure can work safely.
通过拉伸实验、金相分析和显微硬度测试，研究了焊接接头力学性能与工艺参数之间的关系。
Tensile tests, metallographic analyses and micro-Vickers tests were carried out to evaluate the mechanical properties of the joints as a function of the process parameters.
通过接头宏观力学性能测试和微观金相分析，研究了焊接时间对接头性能的影响，从而得到实心、空心螺柱合理的焊接工艺参数。
The effects of welding time on the property of the joins were researched by using macroscopically mechanical property testing and microcosmic crystalline phase analyses. The reasonable welding …
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