Surfacing welding process for copper pipe and stainless steel pipe

Abstract

The invention relates to a surfacing welding process for a copper pipe and a stainless steel pipe. The surfacing welding process is characterized by comprising the following steps: step 1, arranging apipe end groove at one end of the copper pipe opposite to the stainless steel pipe; step 2, cleaning the position on the copper pipe close to the pipe end groove and the position on the stainless steel pipe close to the pipe end groove; step 3, preheating the copper pipe at 80-100 DEG C and preserving heat for 150 min; step 4, accumulating welding wires on the pipe end groove of the copper pipe;step 5, welding the copper pipe and the stainless steel pipe by adopting argon arc welding; and step 6, wrapping the welding position of the copper pipe and the stainless steel pipe by glass wool; andthe copper pipe and the stainless steel pipe are cooled to room temperature through heat preservation. The problems that the heat dissipation of the copper pipe is fast due to the low temperature ofthe oxyacetylene flame, the copper pipe and the stainless steel pipe are not welded thoroughly due to the adoption of gas welding, the appearance quality of a slag welding part is poor after welding and the like in the prior art are solved.

Description

technical field [0001] The invention relates to a welding process, in particular to a surfacing welding process for copper pipes and stainless steel pipes. Background technique [0002] In general, welding is a process of joining metals using heat, high temperature or pressure. Welding between two materials is involved in many industrial equipment, flame arrester is one of them. Flame arresters are safety devices used to prevent the spread of flames of flammable gases and flammable liquid vapors. Due to the excellent thermal conductivity of copper and good plasticity at room temperature, it can be used in pipelines where the flow rate of the medium changes rapidly and is flammable and explosive, and it can play the role of fire resistance and rapid heat dissipation. Since both ends of the flame arrester are stainless steel, it is necessary to weld the copper tube and the stainless steel tube. Due to the different welding temperatures of copper and stainless steel, it is d...

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Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the present invention discloses a surfacing welding process for copper pipes and stainless steel pipes, so as to solve the problems in the prior art that the low temperature of the oxyacetylene flame causes the temperature of the copper pipes to dissipate heat quickly, and the use of gas welding causes the copper pipes and stainless steel pipes to dissipate heat quickly. The pipe is impenetrable and after welding, slag will be produced, and the appearance quality of the weld is poor.

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