Stainless steel weldment and pad combined welding method

US9808876B2 · kind B2 · utility

Assignee

• CHINA NATIONAL CHEMICAL ENGINEERING THIRD CONSTRUCTION CO., LTD · CN

Inventors

• Jiewen Xia · Meekrap-oord, CN
• Qingping Huang · Beijing, CN
• Jialin Chen · Meekrap-oord, CN
• Yuxian Su · Meekrap-oord, CN
• Wenwei Li · Daguantang, CN
• Liyang Pang · Meekrap-oord, CN
• Yan Wu · Shanghai, CN

Key dates

• Filing date: Sep 3, 2013
• Grant date: Nov 7, 2017
• Expiry date: Aug 14, 2034

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23K2103/05
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A stainless steel weldment and pad combined welding method includes steps of: (a) respectively processing and pairing butts of to-be-welded portions of two weldments, wherein, during pairing, inner walls of the two weldments are aligned at the same plane; the butts of the two weldments are opposed to form a V-shaped groove with an angle α; and between bottoms of the butts of the two weldments is kept a gap L of 2-4 mm; (b) providing a copper pad at the gap between the bottoms of the butts of the two weldments, wherein the copper pad closely attaches to the inner walls of the two weldments; (c) welding the V-shaped groove to form a root pass; and (d) removing the copper pad, and filling the root pass to be welded into a cover pass.