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bao bi gao ta han jie bian xing de kong zhi
Author(s): 
Pages: 64-66
Year: Issue:  11
Journal: Welding Technology

Keyword:  化工高塔薄壁焊接变形控制;
Abstract: 提出了根据塔体直径D与壁厚t的比值判断薄壁高塔环焊缝(B类焊缝)焊后产生束腰变形的倾向性;采用小尺寸坡口(如Ⅰ形坡口)和小焊接参数(减小焊接热输入)等工艺措施,可有效地控制薄壁塔环焊缝焊接时产生的束腰变形.此外,减小人孔筒体与塔体之间的配合间隙,采用较小焊接热输入、先焊内侧后焊外侧的焊接顺序及刚性固定等工艺措施,较好地控制了人孔筒体与塔体之间的马鞍形焊缝(D类焊缝)焊接时产生的焊缝附近塔体塌陷及塔...
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