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Submerged-arc welding metal core weldingwire for austenite stainless steel

A technology of austenitic stainless steel and submerged arc welding, which is applied in the direction of arc welding equipment, metal processing equipment, welding medium, etc., can solve the problems of complicated manufacturing process, complicated manufacturing process, and no patent report, etc., and achieve stable welding quality, The production process is simple and convenient, and the effect of overcoming the difficulty of slag removal

Inactive Publication Date: 2006-08-23
BEIJING UNIV OF TECH
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  • Summary
  • 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

Method used

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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

Examples

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specific Embodiment approach

[0026] Several examples of the metal-cored wire 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 adopts HJ260, which is dried at 400℃ before welding and heat preservation for 2 hours. Welding groove and weld samples are selected according to 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%. After drawing and reducing the diameter, a welding wire with a diameter of 4mm is obtained. The mass percentage of each alloying 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 (width 14mm, thickness 0.5mm) low carbon steel strip with a filling rate of 44%. After d...

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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, in terms of economy, practicality and technology, the most commonly used welding methods in production are electrode arc welding, flux-cored gas shielded welding and submerged arc welding. The corresponding welding materials are mainly stainless steel electrodes and stainless steel gas shielded flux cores. Solid wire for welding wire and stainless steel submerged arc welding. [0003] The equipment used in stainless steel electrode arc welding is simple, easy to operate, flexible, reliable, and adaptable, which is one of the important reasons for its wide application. However, the qual...

Claims

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Application Information

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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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