Reduction of UTS of about 20-30% with respect to base material occurred with rupture in the softened zone of welding, usually HAZ.
与母材相比，焊接后的试样抗拉强度减小了大约20 ~ 30%，试样在软化区发生断裂，该区域通常是热影响区。
This paper analyzes the welding performances of the pipeline steel X80 including softening of heat affected zone, its matching with base material and the possibility of welding cracking. It also de…
文章分析了高强度X80 钢管道的热影响区的软化、焊缝金属与母材的匹配及产生焊接裂纹的可能性，介绍了管道环缝焊接工艺，还列举了国外X80钢管道的焊接工程实例。
The microhardness and tensile strength of stir zone increase compared with the base material, and the elongation increases significantly due to its fine and uniform microstructure of the specimen.
搅拌区细晶组织的显微硬度及抗拉强度相比于铸态母材有所提高，而伸长率显著提高。
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