焊缝氢含量的测试分析表明，阵列式射流冲击热沉系统可以改善接头的残余应力分布，防止冷却水侵入焊缝。
The hydrogen contents investigations show that the FSW process with array jet impingement sink appaatus can prevent the joints form the effect of colding water.
缺点是在碳钢中有氢致裂纹、铝合金中有焊缝气孔产生的危险。
Disadvantages include risk of hydrogen cracking in carbon steels and weld metal porosity in aluminium alloys.
解释了水蒸气保护焊焊缝的氢质量分数不高，不出现气孔的原因。
The reason for not high hydrogen content and free porosity in welds with this process is explained.
结果表明：由于焊接电流过大，使焊缝产生淬火马氏体组织及较大的焊接残余应力，导致镀锌氢脆敏感性增加，造成吸油盘发生氢脆开裂。
The large welding current caused the formation of quenched martensite and the high residual stresses in the welding zone, resulting in the increase of zinc sensitivity of hydrogen attack.
本文研究了焊缝中扩散氢含量与预热温度的关系。
In this paper, the influence of pre heating temperature on the content of diffusive hydrogen in weld joint was studied.
在碱性铁粉焊条药皮中添加不同量的纳米稀土氧化物粉体，对焊缝进行扩散氢含量、低温冲击及化学成分的测试和分析。
Adding the different nanometer CeO2 content to alkali iron powder electrode, the diffusible hydrogen content, low-temperature impact and chemical composition of the weld were tested.
高温高压临氢管道运行一段时间发现多道焊缝裂纹，较为罕见。
The hydrogenation pipe would weld crack after running for some time as high temperature and high pressure, and the phenomenon was rare.
采用不同配比的保护气体，在水冷铜模中堆焊焊缝金属，获得不同扩散氢含量的熔敷焊缝试棒。
Deposit metal samples are prepared by GMAW shielded with different gases in copper mould with water cooling.
采用不同配比的保护气体，在水冷铜模中堆焊焊缝金属，获得不同扩散氢含量的熔敷焊缝试棒。
Deposit metal samples are prepared by GMAW shielded with different gases in copper mould with water cooling.
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