Preheating shall also be applied to the tack welding , when the weldment requires preheating.

需要预热的焊件,定位焊时也应按规定进行预热.

Preheating shall also be applied to the tack welding, when the weldment requires preheating.

需要预热的焊件，定位焊时也应按规定进行预热。

It is more usual to complete the weldment first and then to galvanize it.

所以常用的方法是先把钢板焊起来再镀锌.

Heating and cooling a weldment in such a way as to obtain desired properties.

为了获得期望的特性，对焊接件进行的加热及冷却。

The initiation toughness has a linear relationship with stretch zone width in the weldment.

裂纹尖端的延伸区宽度和起裂韧性具有良好的关系。

Whole weldment includes practically elastic deformation zone, compressive plastic deformation zone, tensile plastic deformation zone and melting pool.

整个焊接板由弹性变形区、压缩塑性变形区、拉伸塑性变形区和熔池组成。