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Austenitic stainless steel argon tungsten-arc welding active agent and preparation method and application thereof

A technology of austenitic stainless steel and argon tungsten arc welding, applied in arc welding equipment, welding equipment, welding equipment, etc., to achieve the effect of reducing welding, accelerating flow, and tightening conductive channels

Inactive Publication Date: 2018-10-12
HUAHENG WELDING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the active agent in the prior art is mainly composed of oxides, chlorides and a small amount of fluoride, and there is a problem that the penetration depth is limited. For example, the weld penetration depth of the welding method disclosed in ZL201310449499.X is 12 mm; The active agent can only weld stainless steel below 8.5mm; the stainless steel weld penetration depth of the active agent disclosed in ZL201610692067.5 is 14mm; the imported Ukrainian active agent is used, and the stainless steel weld penetration depth is 13.2mm

Method used

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  • Austenitic stainless steel argon tungsten-arc welding active agent and preparation method and application thereof
  • Austenitic stainless steel argon tungsten-arc welding active agent and preparation method and application thereof
  • Austenitic stainless steel argon tungsten-arc welding active agent and preparation method and application thereof

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preparation example Construction

[0023] The present invention also provides a preparation method of the austenitic stainless steel tungsten argon arc welding activator described in the above technical solution, comprising the following steps:

[0024] SiO 2 Powder, TiO 2 Powder, Cr 2 o 3 powder, NiO powder, MnO powder, CuO powder and B2 o 3 The powders are mixed to obtain the austenitic stainless steel tungsten argon arc welding activator.

[0025] The present invention has no special limitation on the mixing method, and a mixing method well known to those skilled in the art can be used, specifically, such as stirring.

[0026] The present invention preferably adopts the grinding method well-known to those skilled in the art to SiO 2 Powder, TiO 2 Powder, Cr 2 o 3 powder, NiO powder, MnO powder, CuO powder and B 2 o 3 The powder was ground to 200 mesh powder.

[0027] The present invention also provides the application of the austenitic stainless steel tungsten arc welding activator described in th...

Embodiment 1

[0035] An austenitic stainless steel tungsten argon arc welding activator, comprising the following components in percentage by weight: 35% SiO 2 Powder, 26%TiO 2 Powder, 13%Cr 2 o 3 powder, 8% NiO powder, 4% MnO powder, 8% CuO powder and 6% B 2 o 3 powder. Of which SiO 2 Powder, TiO 2 Powder, Cr 2 o 3 powder, NiO powder, MnO powder, CuO powder and B 2 o 3 The particle size of the powder is 200 mesh.

[0036] Weigh the material according to the above ratio, and then use acetone to make a paste for later use. Before welding, clean the surface of the stainless steel plate with sandpaper, and then use acetone and alcohol to scrub the surface of the plate. During the test, use a brush to evenly coat the active agent on the left and right sides of the area to be welded by 10mm. The coating thickness can cover the metal surface. After the acetone volatilizes, perform A-TIG welding. Welding 20mm 304 austenitic stainless steel, it was found that TIG welding without adding ...

Embodiment 2

[0047] An austenitic stainless steel tungsten argon arc welding activator, comprising the following components in weight percentage: 36% SiO 2 Powder, 27%TiO 2 Powder, 12%Cr 2 o 3 powder, 7% NiO powder, 4% MnO powder, 7% CuO powder and 7% B 2 o 3 powder. Of which SiO 2 Powder, TiO 2 Powder, Cr 2 o 3 powder, NiO powder, MnO powder, CuO powder and B 2 o 3 The particle size of the powder is 200 mesh.

[0048] Weigh the material according to the above ratio, and then use acetone to make a paste for later use. Before welding, clean the surface of the stainless steel plate with sandpaper, and then use acetone and alcohol to scrub the surface of the plate. During the test, use a brush to evenly coat the active agent on the left and right sides of the area to be welded by 10mm. The coating thickness can cover the metal surface. After the acetone volatilizes, perform A-TIG welding. The 20mm 304 austenitic stainless steel is welded, and the activator of Example 2 is used for...

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Abstract

The invention provides an austenitic stainless steel argon tungsten-arc welding active agent and relates to the field of activators for welding. The active agent provided by the invention is composedof oxides and is poisonless and harmless. After the active agent is added, the quantity of metallic vapor generated on the surface of a molten pool is restrained, under the circumstance of little metal vapor, only metal within a small range near an anode spot rises, is gasified and ionized, thus an arc electric conduction channel is tightened, arc pressure is increased, flowing of metal liquid inthe molten pool is quickened, enlarged and deepened, fusion depth is increased substantially, and 16-mm single face welding and double face shaping can be achieved. In addition, SiO2 enables the content of Si in a weld joint to be increased slightly through metallurgic reaction, Si has a direct influence on a solidification mode, Si can increase w(Cr)eq / w(Ni)eq, the development of FA solidification mode is facilitated, the ferritiszation effect is facilitated, generation of a delta phase can be facilitated, the development of austenitic dendrites is hindered, and mechanical properties of a weld joint structure are improved.

Description

technical field [0001] The invention relates to the technical field of activators for welding, in particular to an activator for austenitic stainless steel tungsten argon arc welding and its preparation method and application. Background technique [0002] Austenitic stainless steel is the most important type of stainless steel, its output and consumption account for 70% of the total stainless steel, and it is widely used in chemical industry, petroleum container and other industries. Due to the limited current-carrying capacity of the tungsten electrode itself, tungsten argon arc welding (TIG) limits the upper limit of the arc power, resulting in a shallow single-pass weld penetration. For austenitic stainless steel plates with a thickness greater than 4mm, beveling is required Perform multi-pass welding. Although increasing the welding current can increase the penetration depth, the increase in the fusion width is even greater. [0003] A-TIG welding is to apply a thin l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/363B23K35/40B23K9/173
CPCB23K9/173B23K35/362B23K35/40
Inventor 杨成刚宋友民钟光紫潘克坚
Owner HUAHENG WELDING
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