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High-alloy martensite type refractory steel air-protecting flux-cored wire

A technology of flux-cored welding wire and martensite, applied in welding medium, welding equipment, welding equipment and other directions, can solve the problems of complex manufacturing process, low welding efficiency and poor process performance.

Inactive Publication Date: 2007-09-26
北京金太阳药芯焊丝有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These welding materials have disadvantages in varying degrees: manual arc electrodes cannot be welded continuously, low welding efficiency, and serious waste; solid welding wire has large spatter, poor process performance, and the manufacturing process is complicated, requiring repeated drawing, annealing, and pickling and passivation
[0003] The development of high-alloy martensitic heat-resistant steel gas-shielded flux-cored welding wire has not yet been related to patent reports at home and abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] A low-carbon steel strip with a width of 8-10mm and a thickness of 0.3-0.4mm is selected. Roll it into a U-shape first, and then add mixed medicinal powder with a particle size of 60-80 mesh (metal powder can pass through a 60-mesh sieve, and mineral powder can pass through a 80-mesh sieve) into the U-shaped groove. The percentage of the total weight of the welding wire) is 21-28%. Then close the U-shaped groove, wrap the powder in it, and cut the diameter to 1.2mm. The specific implementation plan is as follows:

[0024] 1. Select 10×0.4 (width 10mm, thickness 0.4mm) low carbon steel strip. Take chromium powder 41%, tungsten iron 7%, manganese 8%, molybdenum iron 2.5%, nickel powder 2%, vanadium iron 1.25%, natural rutile 20%, quartz 4%, MnO 2 1%, Al 2 o 3 1%, feldspar 3%, AI-Mg alloy 3%, iron powder 6.25%. The fill rate is 21%.

[0025] 2. Select 10×0.4 (width 10mm, thickness 0.4mm) low carbon steel strip. Take chromium powder 36.5%, tungsten iron 6%, manganes...

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Abstract

The invention relates to a gas shield flux-cored wire of high alloy martensite heat-resistant steel, belonging to the welding field in material processing project. The outer skin of wire adopts low carbon steel belt. It is characterized in that components of flux-core are 29-41% of chromium powder by wt, 4.5-7% of ferrotungsten by wt, 2.5-8% of manganese, 1-2.5% of ferromolybdenum by wt, 0.75-2% of nickel powder by wt, 0.75-1.25% of ferrovanadium by wt, 20-35% of TiO2 by wt, 4-10% of quartz by wt, 1-3% of MnO2 by wt, 1-3% of Al2O3 by wt, 1-3% of Al-Mg alloy by wt and 1.5-6.25% of iron powder by wt. when the flux-cored wire is used in welding the wire line metal not only has higher intensity and impact toughness but also excellent welding process performance and all-position welding adaptability.

Description

technical field [0001] The invention belongs to the field of welding in material processing engineering. The invention is mainly applied to the all-position welding of high-alloy martensitic heat-resistant steel of pressure vessels, nuclear reactors and heating pipe systems of power plant boilers. Background technique [0002] There are many welding methods for high-alloy martensitic heat-resistant steel, and any method of fusion welding can be used for welding. At present, the most widely used welding methods in production are electrode arc welding, argon tungsten arc welding, and submerged arc welding, and the corresponding welding materials are mainly arc welding electrodes, argon tungsten arc welding solid wire and submerged arc welding solid wire. These welding materials have disadvantages in varying degrees: manual arc electrodes cannot be welded continuously, low welding efficiency, and serious waste; solid welding wire has large spatter, poor process performance, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/36B23K35/40B23K9/095
Inventor 栗卓新王根士李国栋魏琪
Owner 北京金太阳药芯焊丝有限公司
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