The increase of weld current can reduce the hardness and the content of upper bainite, and lower the sensibility of hydrogen cracking of the joints.
在避免烧穿的前提下增大焊接电流能够减小硬度、减少上贝氏体，从而降低氢致开裂敏感性。
Disadvantages include risk of hydrogen cracking in carbon steels and weld metal porosity in aluminium alloys.
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。
The principle and operation procedure of the thermal conduction gas chromatography used to measure the diffusion hydrogen in weld metal was expatiated.
阐述了色谱法测定焊接熔敷金属中扩散氢的测试原理及基本操作程序。
In this paper, the influence of pre heating temperature on the content of diffusive hydrogen in weld joint was studied.
本文研究了焊缝中扩散氢含量与预热温度的关系。
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.
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。
The influence factors such as the hydrogen content in weld metal, the hydroscopicity in electrode coating and the toughness of weld metal of basic electrodes are studied.
研究了碱性焊条工艺性的影响因素，探讨了焊缝金属的含氢量、焊条药皮的吸湿性、焊缝金属的强韧化特性等。
Reducing content of hydrogen effect of fluoride, carbonate, active chide and rare earth oxide in weld by self-shielded flux-cored wire with CaF2-TiO2 MgO slag system is investigated.
探讨氟化物、大理石、高价氧化物和稀土氧化物在氟钙钛渣系自保护药芯焊丝中的降氢机理。
The flux coatings major task is to vaporize and form a shielding gas to protect the weld puddle from nitrogen, hydrogen and oxygen.
通量涂料主要任务是蒸发，形成保护气体保护焊水坑由氮气，氢气和氧气。
Welding methods and technology of narrow gap quirk backing weld were discussed. Indirect quirk backing weld using manual hydrogen arc welding is considered as the best result.
讨论了窄间隙深槽打底焊焊接方法和工艺，认为用手工氩弧焊进行单面深槽打底焊效果最好。
Welding methods and technology of narrow gap quirk backing weld were discussed. Indirect quirk backing weld using manual hydrogen arc welding is considered as the best result.
讨论了窄间隙深槽打底焊焊接方法和工艺，认为用手工氩弧焊进行单面深槽打底焊效果最好。
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