Submerged-arc welding metal core weldingwire for austenite stainless steel

An austenitic stainless steel, submerged arc welding technology, applied in arc welding equipment, metal processing equipment, welding medium and other directions, can solve the problems of complex production process, reduced production efficiency, complex manufacturing process, etc., and achieves simple and convenient production process. The effect of improving production efficiency and stable welding quality

Inactive Publication Date: 2008-04-23
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After welding, it has to be polished with a grinding wheel, which is not only labor-intensive, but also reduces production efficiency
In addition, the manufacturing process of solid wire for submerged arc welding is complex, requiring repeated drawing, annealing, pickling and passivation, especially when the wire rod contains more alloying elements, the phenomenon of work hardening is more serious, and the manufacturing process is more complicated
[0006] After searching domestic and foreign patents, there is no (related) patent report

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  • Submerged-arc welding metal core weldingwire for austenite stainless steel
  • Submerged-arc welding metal core weldingwire for austenite stainless steel
  • Submerged-arc welding metal core weldingwire for austenite stainless steel

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specific Embodiment approach

[0026] Several examples of metal-cored wires for submerged arc welding in the present invention are selected to compare the welding effect with the solid wire H00Cr19Ni12Mo2 for submerged arc welding commonly used in production. The base material is A316L, and its chemical composition is shown in Table 1. The submerged arc flux is HJ260, dried at 400°C before welding, and kept warm for 2 hours. Welding grooves and weld samples are selected in accordance with GB / T17854-199 and GB4334.5-90. The specific implementation is as follows:

[0027] 1. Select 14×0.5 (width 14mm, thickness 0.5mm) low-carbon steel strip with a filling rate of 40%, and obtain a welding wire with a diameter of 4mm after drawing and diameter reduction. The mass percentage of each alloy element in the metal core is: 55% Cr, 31% Ni, 3% Mn, 4% Fe, 4% Mo, 1% Bi 2 o 3 . , 2% Al-Mg.

[0028] 2. Select 14×0.5 (14mm in width and 0.5mm in thickness) low-carbon steel strip with a filling rate of 44%. After drawi...

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Abstract

The present invention belongs to the field of material processing technology, relates to the welding technology of austenite stainless steel, and is especially one kind of metal core welding wire for submerged-arc welding of austenite stainless steel. The present invention features that the metal core welding wire has a coating layer of carbon steel belt and ultra low carbon steel belt; and a powder core comprising Cr 34-55 wt%, Ni 20-33 wt%, Mn 3-7 wt%, Mo 4-8 wt%, Fe 4-21 wt%, Bi2O3 0.5-1.5 wt% and Al-Mg alloy 2-10 wt%, and with filling rate of 40-58 %. The present invention has simple production process and excellent welding detachability, and is especially suitable for use in high speed automatic welding.

Description

technical field [0001] The invention belongs to the field of material processing engineering and is mainly used for welding austenitic stainless steel in the fields of petroleum, chemical industry, medicine, shipbuilding, food and the like. Background technique [0002] There are many welding methods for austenitic stainless steel, and any method of fusion welding can be used for welding. However, from the perspective of economy, practicality and technology, the most widely used welding methods in production are electrode arc welding, flux cored wire gas shielded welding and submerged arc welding, and the corresponding welding materials are mainly stainless steel electrodes and stainless steel gas shielded flux cores. Welding wire and solid wire for submerged arc welding of stainless steel. [0003] The equipment used for arc welding of stainless steel electrodes is simple, easy to operate, flexible, reliable, and adaptable, which is one of the important reasons for its wid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/32B23K35/24B23K9/18
Inventor 栗卓新李国栋魏琪蒋建敏班书英
Owner BEIJING UNIV OF TECH
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