需焊接或热切割的表面应排除所有可能会损坏焊材或母材的杂物，如脂、油、灰尘、水垢、熔渣和油漆等。
Surfaces to be welded or thermally cut shall be cleaned of all foreign material such as grease, oil, dirt, scale, slag and paint that would be detrimental to either the weld or base material.
当（螺柱）直接焊于母材时，严禁母材厚度薄于螺柱直径的1/3。
When welding directly to base metal, the base metal shall be no thinner than 1/3 the stud diameter.
它是一种利用焊条与工件之间电弧产生的热量熔化焊条和母材而将被焊工件连接起来的焊接方法。
This welding process joints work pieces by melting the electrode and the base metal with the heat from the electric arc between the electrode and the work piece.
结果表明，采用TLP连接技术进行钻杆焊接，接头成形好，接头组织与母材相似并连续生长，接头强度、塑性均达到母材水平。
The results show that TLP bonding produces a good joint with microstructure and strengths similar to those of base metal.
获得优质变形镁合金母材。
Magnesium wrought alloy with excellent quality is obtained in the experiment.
接头拉伸强度较高，一般为母材95%左右。
Joint tensile strength was high, generally 95% of base metal.
焊接接头强度、塑性均可达到与母材相当的水平。
The strength and plasticity of welds were equivalent to the base metal.
母材区除了奥氏体组织外，存在铜元素的扩散。
Other than austenite, copper element dissolution is found in material.
同时发现焊接区的硬度约为母材硬度的70%。
And the hardness of the weld account for 70 percent of the main body material.
母材区除了奥氏体组织外，存在铜元素的扩散。
Other than austenite, copper element dissolution was found in material.
在合适的激光焊接条件下，热影响区韧性高于母材；
The toughness of HAZ is higher than base metal under appropriate laser welding conditions.
另外采用系列加载试验对焊缝、母材的性能进行了研究。
In addition, series load experiments were used to study properties of weld and base metal.
打磨焊缝表面缺陷或机械损伤后的厚度小于母材的厚度。
Seam surface defect after grinding or thickness is lower than base material after mechanical treatment.
冲击处理使焊缝区和母材区的强度和伸长率均有所增加。
The tensile strength and the elongation percentage of the parent metal and the weld zone increased slightly.
实验结果表明：接头的微观组织和化学成分与母材趋于一致；
The results show that the microstructure and composition of the bonded zone are similar to those of the substrate.
本文研究了母材成分、石墨形态和工艺参数对重熔层性能的影响。
This paper investigates the effects of the mother material content, the graphite form and the technological parameters on the performance of remelting layer.
结果表明，固溶处理状态下母材氩弧焊时具有较低的冷裂纹敏感性。
The experimental results show that, under solution treatment condition, this alloy has lower cold-crack susceptibility.
X65钢母材的抗开裂性能明显优于焊缝，且具有良好的止裂性能。
The crack resistance of X65 steel is much better than that of the weld and X65 pipeline steel has good crack arrest property.
电阻点焊接头的焊接强度由母材和熔核的材料属性及几何特征决定。
Strength of resistance spot weld is determined by the physical attributes of weldment including material and geometric issues.
容器的液压爆破试验证明，母材和焊接接头具有良好的综合力学性能。
The hydrostatic pressure explosion test on vessel indicates tha both base metal and weld metal have good comprehensive mechanical properties.
研究表明，铜的加入能够显著降低钎焊温度，从而有效保护钎焊母材。
The studies show that the addition of copper can lower brazing temperature significantly, by this can protect the brazing base materials effectively.
另外介绍了母材缺陷分层、夹杂物、带状组织对ERW焊缝的危害性。
In addition, it is introduced that the layer, impurities and band structure in base material are harmful to the weld quality of ERW steel pipe.
搭接接头的塑性较差，伸长率仅有3.18%，不及母材伸长率的25%；
The elongation of joints was only 3.18%, less than 25% that of base metal.
结果表明炉管的累积损伤具有局部性，下部高温段的焊缝损伤较母材严重。
The results show the accumulated damage of reformer tubes is localized, and the damage of the weldment located at the lower part of reformer tubes is more serious than that of the parent metal.
熔合区的显微硬度比母材高，随着功率的增大，显微硬度增大的区域增宽。
Microhardness test showed that hardness increased toward the center of the welded zone and as the irradiation power increased, the range of hardness increased was expanded.
与母材相比，焊缝区组织细小，硬度较高，焊缝区不同部位的硬度存在一定差异。
Compared with base metal, the microstructure in fusion zone is finer, and the hardness is higher. The hardness difference exists at various places in fusion zone.
结果表明焊接接头裂端应力三轴性随焊缝和母材匹配性质及裂纹几何不同而变化。
The numerical results show that the stress triaxiality varies with the mis matching mode and crack geometry of welded joints.
结果表明焊接接头裂端应力三轴性随焊缝和母材匹配性质及裂纹几何不同而变化。
The numerical results show that the stress triaxiality varies with the mis matching mode and crack geometry of welded joints.
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