High anticrack, wear-resistance, high-cr cast iron cored solder wire for huild-up welding

A high chromium cast iron, high crack resistance technology, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve problems such as spalling, component fracture, broken, limited use range, etc.

Inactive Publication Date: 2006-05-24
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large amount of alloy used, it is still a brittle material. During use, especially under high stress and high impact conditions, parts often break and break, which limits its scope of use.
[0004] Most of the high-chromium cast iron surfacing flux-cored wires used at present are imported from the British alloy welding company (Welding-Alloys, referred to as WA Company). When the surfacing is multi-layered, due to the accumulation of residual stress, the cracking is more serious. The cracks crack from the surface of the surfacing layer to the bottom of the surfacing layer. When subjected to high stress or high impact load, the surfacing metal will Will break along the crack, peel off

Method used

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  • High anticrack, wear-resistance, high-cr cast iron cored solder wire for huild-up welding
  • High anticrack, wear-resistance, high-cr cast iron cored solder wire for huild-up welding

Examples

Experimental program
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Effect test

Embodiment Construction

[0023] All welding wires in the examples are produced by the "FCWM50" flux-cored welding wire forming machine produced by Kunming Heavy Industry:

[0024] 1. Select 10×0.3 (width 10mm, thickness 0.3mm) H08A cold-rolled steel strip. Roll it into a U shape first. Get 43 grams of chromium carbide, 23 grams of vanadium iron, 5 grams of 75# ferrosilicon, 6 grams of manganese metal, 3 grams of aluminum-magnesium alloy, 5 grams of ferroboron, 5 grams of ferrotitanium, 4 grams of ferroniobium, and 6 grams of ferromolybdenum. (The particle size of the powder taken is that it can pass through a 120-mesh sieve). The various powders taken are put into a powder mixer and mixed for 10 minutes, and then the mixed powder is added into a U-shaped H08A cold-rolled steel strip groove, and the filling rate is 30%. Close the U-shaped groove so that the powder is wrapped in it. Then make it pass through drawing dies with diameters of 4.2mm, 3.6mm, 3.4mm, 3.15mm, 2.95mm, 2.8mm, 2.6mm, and 2.4mm, ...

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Abstract

The present invention relates to a high-anticracking high-chrome cast iron type hardfacing flux-cored welding wire. Its flux core composition includes (by wt%) 43-70% of chromium carbide, 10-25% of ferrovanadium, 1-5% of 75# ferro-silicon, 3-8% of metal manganese, 1-3% of alumino-magnesium alloy, 2-5% of ferro-boron, 2-6% of ferro-titanium, 1-5% of ferro-niobium and 2-8% of ferro-molybdenum.

Description

technical field [0001] The invention belongs to the field of welding in material processing engineering, and the invention is mainly used in the surfacing repair of high-stress, high-impact wear parts such as steel mill coal grinding rollers, cement grinding discs, crusher hammers, cold (hot) rolling bars, etc. Background technique [0002] At present, in the mining, building materials and electric power industries in our country, about 800,000 tons of steel are lost due to wear and tear every year. Improving the wear resistance of materials and reducing wear and tear are important tasks that the production department expects to solve. [0003] High chromium cast iron is one of the best wear-resistant materials after ordinary white cast iron, high manganese steel and nickel hard cast iron. It has been applied in our country since the 1980s, because the tissue contains ideal M 7 C 3 Type carbide, compared with other white irons, shows good wear resistance and comprehensive ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/22
Inventor 栗卓新蒋旻蒋建敏贺定勇魏琪史耀武王英杰
Owner BEIJING UNIV OF TECH
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