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Argon arc welding technique with online and continuous weld heat treatment

A technology of argon arc welding and process, which is applied in the direction of welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of steel types that cannot meet special materials, weld seam and heat-affected zone fracture, and easy welding stress, etc., to avoid The effect of hydrogen-induced cracking, reducing the welding strain rate, and reducing the degree of hardening

Inactive Publication Date: 2017-01-25
WUHAN KAIQI SPECIAL WELDING EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 ordinary argon arc welding process cannot meet the welding requirements of special material steel, especially 400 series stainless steel, high-strength alloy steel and high phosphorus steel. land:
[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

Method used

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  • Argon arc welding technique with online and continuous weld heat treatment
  • Argon arc welding technique with online and continuous weld heat treatment
  • Argon arc welding technique with online and continuous weld heat treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] An argon arc welding machine with on-line continuous weld seam heat treatment, comprising an argon arc welding trolley 1 and a C-shaped frame 2, the C-shaped frame 2 is sequentially provided with a shearing device 3 and connected to the argon arc welding trolley 1 As for the matching reflective electrode 4, the C-shaped frame 2 is provided with a heat treatment device 5 corresponding to the position between the shearing device 3 and the reflective electrode 4, which can conduct online continuous weld seam heat treatment on the weld seam area. The heat treatment device 5 is used to preheat the welding area before welding, so that both the welding stress and the welding strain rate can be reduced, which is beneficial to avoid welding cracks and the escape of diffused hydrogen in the weld metal, and avoid the generation of hydrogen At the same time, it can also reduce the hardening degree of the weld seam and the heat-affected zone, and it also has an auxiliary effect on sl...

Embodiment 2

[0051] Embodiment 2 (for high-strength alloy steel and high-phosphorus steel, etc., of course, 400 series stainless steel can also adopt the scheme of this embodiment, but it is easy to produce brittleness):

[0052] An argon arc welding process with on-line continuous weld seam heat treatment, comprising the following steps:

[0053] 1) The on-line strip steel is sheared and stitched by the shearing device 3 on the shearing station of the welding process;

[0054] 2) After the shearing and jointing is completed, the welding area of ​​the on-line strip steel is preheated on-line through the heat treatment device 5 on the heat treatment station of the welding process, and the preheating temperature is 150-250° C.;

[0055] 3) After heating up and preheating, the online strip steel is welded by the argon arc welding trolley 1 on the welding station of the welding process;

[0056] 4a1) After the welding is completed, the weld zone of the online strip steel is carried out on the...

Embodiment 3

[0063] Embodiment 3 (specifically for 400 series stainless steel):

[0064] An argon arc welding process with on-line continuous weld seam heat treatment, comprising the following steps:

[0065] 1) The on-line strip steel is sheared and stitched by the shearing device 3 on the shearing station of the welding process;

[0066] 2) After the shearing and jointing is completed, the welding area of ​​the on-line strip steel is preheated on-line through the heat treatment device 5 on the heat treatment station of the welding process, and the preheating temperature is 150-250° C.;

[0067] 3) After heating up and preheating, the online strip steel is welded by the argon arc welding trolley 1 on the welding station of the welding process;

[0068] 4a1) After the welding is completed, the weld zone of the online strip steel is carried out on the primary normalizing station of the welding process through the primary normalizing mechanism 5a1 for primary normalizing of the online conti...

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Abstract

The invention discloses an argon arc welding technique with online and continuous weld heat treatment, which comprises the steps of shearing joint, preheating, welding, normalizing and tempering . (1)The online strip steel is sheared and pieced by shearing device on the shearing station of the welding process. (2)The welding area of the online strip steel carries out online and continuous preheating by heat-treating device on the heat-treating station of the welding process after being sheared and pieced. (3)The online strip steel carries out welding by argon arc welding car on the welding station of the welding process after being preheated. (4a)The welding area of the online strip steel carries out online and continuous normalizing treatment through normalizing mechanism on the normalizing station of the welding process after being welded. (4b)The welding area of the online strip steel carries out online and continuous tempering treatment through the tempering mechanism on the tempering station of the welding process after normalizing treatment, or the welding area of the online strip steel carries out online and continuous welding brittleness treatment by the brittleness treatment device in the place of the brittleness treatment process. The brittleness treatment process suitable for welding is the next process after welding.

Description

technical field [0001] The invention relates to the field of welding, in particular to an argon arc welding process with on-line continuous weld seam heat treatment. 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 ordinary argon arc welding process cannot meet the welding requirements of special material steel, especially 400 series stainless steel, high-strength alloy steel and high phosphorus steel. land: [0003] 1. Since the temperature of argon arc welding is very high, this welding process will caus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/16B23K9/235B23P15/00
CPCB23K9/16B23K9/235B23P15/00
Inventor 李礼龚志雄王卫强赵波娄富军桂琦殷明
Owner WUHAN KAIQI SPECIAL WELDING EQUIP
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