Argon arc welding machine with on-line continuous weld seam heat treatment and its welding process

Abstract

The invention discloses an argon arc welder with online continuous weld seam heat processing, which comprises a small argon arc welding vehicle and a C-shaped framework, wherein the C-shaped framework is sequentially provided with a cutting device and a reflection electrode; a heat processing device is set on a position between the cutting device and the reflection electrode corresponded with the C-shaped framework; the invention also discloses an argon arc welding technology with online continuous heat processing; the steps comprise that an online strip steel is cut and welded on a cutting station through the cutting device; after being cut and welded, the welding area of the online strip steel is preheated on a heat processing station through the heat processing device; after being preheated, the online strip steel is welded on a welding station through the small argon arc welding vehicle; after welding is completed, online continuous weld seam heat processing is carried out to the weld seam area of the online strip steel on a heat processing station through the heat processing device; and the welding technology is suitable for argon arc welders.

Description

technical field [0001] The invention relates to the field of welding, in particular to an argon arc welding machine with on-line continuous welding seam heat treatment and a welding process thereof. Background technique [0002] With the rapid development of my country's automobile, bridge, construction, home appliance and other industries that have a large demand for steel, steel companies have higher and higher requirements for the output and quality of high-standard and cost-effective steel. At present, most domestic iron and steel enterprises are gradually moving towards product transformation and equipment upgrading. Therefore, the welding of special steel is a major problem that we are about to face, but the use of ordinary argon arc welding machines and welding processes cannot meet the needs of special steel, especially the welding of 400 series stainless steel, high-strength alloy steel and high-phosphorus steel. Requirements, specifically: [0003] 1. Since the t...

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Problems solved by technology

Therefore, the welding of special steel is a major problem that we are about to face, but the use of ordinary argon arc welding machines and welding processes cannot meet the needs of special steel, especially the welding of 400 series stainless steel, high-strength alloy steel and high-phosphorus steel. Requirements, specifically:

[0003] 1. Since the temperature of argon arc welding is very high, this welding process will cause the temperature of the welding area to rise and fall suddenly, resulting in quenching of the weld seam and heat-affected zone, and the weld seam and heat-affected zone after quenching will be obvious Irregular coarse crystals appear (especially 400 series stainless steel, high-strength alloy steel and high-phosphorus steel, etc.), so that the weld and heat-affected zone will break once they are stressed;

[0004] 2. Due to the large temperature difference between the welding area before welding and welding, it is easy to produce welding stress. At the same time, due to the high welding strain rate, it is easy to produce welding cracks and the escape of diffusible hydrogen in the weld metal. Hydrogen-induced cracking, and the degree of hardening of the weld and the heat-affected zone is relatively high

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