The effective methods to avoid the cracking include lowering strictly the content of impurity and adopting low temperature welding process.
有效的改进措施是严格控制杂质含量、将高温焊接工艺改为低温焊接工艺。
Preheating shall be carried out for carbon and low alloy steel welding where required. Preheating temperature shall be kept uniform from the start to the end of welding.
在进行碳钢及低合金钢的焊接时应进行预热。预热温度在焊接开始到结束期间应保持均衡。
However, if outdoor temperature is comparatively low, the records preheating aren't required for the welding operation preheating to room temperature.
但由于室外温度比较低，要求预热到室温后再进行焊接操作的焊前预热可不作记录。
Therefore, the steel is mainly used for low temperature impact of the impact of the components, welding structure and other requirements of higher strength components.
因此，镇静钢材主要用于低温下承受冲击的构件、焊接结构及其他要求强度较高的构件。
Low hydrogen type electrode is baked out before welding, the baking temperature and duration as specified by the manufacturer.
低氢焊条在焊前应烘干，烘干温度和时间遵照厂家说明。
It emphasizes the chemical compositions and mechanical properties of low temperature nickel steel plates, forgings and welding materials.
文中重点介绍了镍系低温钢钢板、锻件和焊接材料的化学成分和力学性能。
The design of the system is mainly for the steel of low-temperature pressure vessel, which can not only design in welding procedures but also in combined welding means.
该专家系统主要是针对低温容器用钢而进行的焊接工艺设计，不仅可以进行单一焊接方法的工艺设计，而且可以进行组合焊接方法的工艺设计。
It has low diffusible hydrogen and good low-temperature impact toughness, suitable for welding middle-carbon steel and pressure containers of low-temperature steel.
扩散氢含量低，低温冲击性能优异，适用于低温钢、中碳钢等压力容器的焊接。
According to the test, the welding interlayer temperature of X60 pipeline in the normal and low temperature is analyzed in order to study the influence of its variable range on welding quality.
通过采取焊前预热、控制焊接线能量和层间温度、焊后保温缓冷等工艺措施，并采用相应的检测方法，保证了胺液吸收塔的低温焊接质量。
By evaluating the technology of new steel type and compiling reasonable process procedure, welding casing made of low temperature steel has been achieved successfully.
通过对新钢种的工艺评定，编制了合理的工艺规程，使压缩机低温钢焊接机壳获得成功。
The temperature difference of welding zone can be decreased with small dipping angle, high dipping speed and low heat exchange coefficient of dipping Zn liquid.
降低浸镀锌液的换热系数，采用小角度快速浸入可以降低焊缝区域温差。
It points out that reasonable drug composition of welding rod can improve the low temperature properties of low carbon steel weld.
指出合理的焊条药皮组分可明显提高低碳钢焊缝的低温性能。
In this paper, the influence of low temperature synchro heating (LTSH) on the mechanical properties of aluminum alloy LY12CZ welding joints was investigated.
本本研究了低温同步加热(LTSH)对高强铝合金ly 12 CZ焊接接头机械性能的影响。
The investigation of effects of rare-earth yttrium and boron, which are in the 3.5% nickel-containing steel welding electrode on low temperature toughness has been carried out.
对含镍3．5％低温钢手工电焊条配方中稀土钇与硼的作用进行了试验研究。
Used for surfacing welding on low hardness under normal temperature such as axle.
常温低硬度堆焊。适用于矿山机械的堆焊与修补。
BOWE Broadway bathroom supply kitchenware industry-specific silver electrode, silver wire, low-temperature welding, silver solder powder, silver paste.
BOWE博威供应橱具卫浴行业专用银焊条，银焊丝，低温焊条，银焊粉，银焊膏。
The effect of welding line energy on microstructure and low temperature toughness of heat-affected zone(HAZ) of X70 pipeline steel was studied by welding thermal simulation method.
采用焊接热模拟技术、显微组织分析和冲击试验的方法，研究了焊接线能量对X70管线钢焊接热影响区组织和低温韧性的影响规律。
Abstruct: The connection mode and welding technological process between tube and tube sheet, tube sheet and shell of low temperature tubular heat exchanger are discussed.
探讨了低温管壳式换热器的管子与管板、管板与壳体的连接方式及焊接工艺。
Used for surfacing welding on low hardness under normal temperature and repairing of mining machinery.
常温低硬度堆焊。适用于矿山机械的堆焊与修补。
WU m F. Study on diffusion welding with low temperature of al alloy and stainless steel and diffusion behavior of main elements [d]. Zhenjiang: Jiangsu University, 2011.
[5]吴铭方。铝合金与不锈钢低温扩散焊及界面主组元扩散行为研究。[d]镇江：江苏大学，2011。
WU m F. Study on diffusion welding with low temperature of al alloy and stainless steel and diffusion behavior of main elements [d]. Zhenjiang: Jiangsu University, 2011.
[5]吴铭方。铝合金与不锈钢低温扩散焊及界面主组元扩散行为研究。[d]镇江：江苏大学，2011。
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