Dedicated welding active agent for deep penetration TIG welding and using method

Abstract

The invention discloses a dedicated welding active agent for deep penetration TIG welding. The welding active agent is composed of, by mass, five percent to 15 percent of NaCl powder, 10 percent to 20 percent of CaO powder, 15 percent to 20 percent of MgF2 powder, 10 percent to 15 percent of Fe2O3 powder, seven percent to 10 percent of SiO2 powder, eight percent to 10 percent of TiO2 powder, 17 percent to 20 percent of Cr2O3 powder, four percent to five percent of La2O3 powder and four percent to five percent of Y2O3 powder. The using method of the active agent comprises the steps that calculation is carried out according to the mass percent, 92 percent to 95 percent of the powder of the dedicated welding active agent for deep penetration TIG welding is mixed with five percent to eight percent of acetone to form the pasty or grease-shaped welding active agent, the surface of a workpiece is evenly coated with the welding active agent through a brush, and welding is carried out after the acetone is fully volatilized. According to the welding active agent, complete penetration is achieved on AISI316 austenitic stainless steel and X70 pipeline steel with the thickness of 14 mm through deep penetration TIG welding, the welding process is simplified, a coarse structure is avoided, the mechanical property of a welding joint is improved, production efficiency is improved, and production cost is lowered.

Description

technical field

[0001] The invention relates to a welding activator and a use method, in particular to a special welding activator for deep penetration TIG welding and a use method, and belongs to the field of welding technology. Background technique

[0002] On the basis of traditional TIG welding, deep penetration TIG welding achieves a relative balance between the large arc pressure formed by high current (>300A) and the surface tension of the liquid metal in the molten pool, forming small holes to realize deep penetration welding. It can achieve single-sided welding and double-sided forming of 12mm thick stainless steel materials. The welding process is stable, the corrugation is fine, and the forming is beautiful. It is a real high-speed, high-efficiency, and low-cost welding method. Deep penetration TIG welding is a small hole welding method, which is essentially different from the principle of small hole plasma welding in the welding process. Plasma welding require...

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