High-hardness, wearable, self-protecting metal cored surfacing welding wire

A surfacing welding wire and metal core technology, which is applied in the field of surfacing welding repair, can solve the problems of self-protecting metal core surfacing welding wire, such as no patents and literature reports, etc., and achieve welding fume and its toxicity, and the amount is small, and the arc is stable Effect

Inactive Publication Date: 2005-06-01
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The development of self-shielding metal core surfacing welding wire

Method used

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  • High-hardness, wearable, self-protecting metal cored surfacing welding wire
  • High-hardness, wearable, self-protecting metal cored surfacing welding wire

Examples

Experimental program
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Embodiment Construction

[0029] All welding wires in the examples are produced by the "FCWM50" flux-cored welding wire forming machine produced by Kunming Heavy Industries:

[0030] 1. Select 14×0.3 (width 14mm, thickness 0.3mm) H08A cold-rolled steel strip. Roll it into a U shape first. Take chromium carbide 64 grams, 75 # 5 grams of ferrosilicon, 10 grams of manganese metal, 1 gram of aluminum-magnesium alloy, 5 grams of ferro-boron, 2 grams of ferro-titanium, 5 grams of ferro-niobium, and 8 grams of ferro-vanadium. (The particle size of the powder taken is that it can pass through a 40-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, draw and reduce the dia...

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Abstract

The high hardness high wear resistance self-protecting metal core built-up welding filament used in material processing engineering features the metal core comprising chromium carbide 64-77 wt%, 75# ferrosilicon 4-8 wt%, metal Mg 5-10 wt%, Al-Mg alloy 1-3 wt%, ferroborium 2-5 wt%, ferrotitanium 2-6 wt%, ferrocolumbium 1-5 wt% and ferrovanadium 1-8 wt%. Using the filament in welding needs no added protecting gas and produces no welding slag, and this makes it possible to perform continuous welding. Programming the automatic welding machine can perform automatic welding operation in high built-up welding quality. The present invention is used mainly in built-up welding for repairing coal grinding roller, cement grinding disc, chute, etc.

Description

technical field [0001] The invention belongs to the field of welding in material processing engineering, and the invention is mainly applied to the surfacing welding repair of coal grinding rollers, cement grinding discs, steel mill troughs, cold (hot) rolls, and the like. Background technique [0002] The existing surfacing welding techniques are mainly manual arc surfacing welding, submerged arc automatic surfacing welding and plasma surfacing welding. These surfacing welding methods all have problems in varying degrees. Generally speaking, the main performance is low production efficiency (such as manual arc surfacing welding cannot be automatically and continuously welded); the cost is too high (such as submerged arc automatic surfacing welding, surfacing one ton of metal requires 2 to 3 tons of flux), can Excessive consumption (currently the flux used in my country is generally smelting flux, and the power consumption of producing one ton of smelting flux is 2000-2500kw...

Claims

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Application Information

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IPC IPC(8): B23K35/24
Inventor 栗卓新蒋旻蒋建敏贺定勇魏琪史耀武
Owner BEIJING UNIV OF TECH
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