A high-boron iron-based wear-resistant surfacing flux-cored wire

A flux-cored welding wire, iron-based technology, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of high cost, high nickel and chromium, easy peeling, etc., to achieve improved toughness, low cost, and improved The effect of overall performance

Inactive Publication Date: 2011-12-21
BEIJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention has good wear resistance, but the disadvantage is that it is brittle and easy to peel off, and there are many metals such as nickel and chromium, and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A high-boron iron-based wear-resistant surfacing flux-cored welding wire, according to the mass of the core powder elements in the welding wire: boron 6%, carbon 0.1%, manganese 2.0%, silicon 1%, and the balance is iron, choose 14× 0.3 (width 14mm, thickness 0.3mm) H08A cold-rolled steel strip. Roll it into a U shape first. Get 790 grams of ferroboron powder, 70 grams of high-carbon ferromanganese, 55 grams of 45# ferrosilicon, and 95 grams of metal iron powder to prepare medicinal powder. The particle size of the obtained powder is such that it can pass through an 80-mesh sieve. Put the various powders taken into the powder mixer and mix for 40 minutes, then add the mixed powder into the U-shaped H08A cold-rolled steel strip groove, the filling rate is 40%, close the U-shaped groove, so that the powder is wrapped in it. Then make it pass through drawing dies with diameters of 4.0, 3.6, 3.3, and 3.2 respectively, draw and reduce the diameter one by one, and finally ma...

Embodiment 2

[0024] The composition of a high-boron iron-based wear-resistant surfacing flux-cored welding wire, according to the mass of the core powder elements in the welding wire: boron 7%, carbon 1.5%, manganese 1.0%, silicon 0.5%, and the balance is iron. 14× 0.3 (width 14mm, thickness 0.3mm) H08A cold-rolled steel strip. Roll it into a U shape first. Get 928 grams of ferroboron powder, 35 grams of high-carbon ferromanganese, 29 grams of 45# ferrosilicon, graphite, and 8 grams are mixed with medicated powder. The particle size of the obtained powder is such that it can pass through an 80-mesh sieve. Put the various powders taken into the powder mixer and mix for 40 minutes, then add the mixed powder into the U-shaped H08A cold-rolled steel strip groove, the filling rate is 40%, close the U-shaped groove, so that the powder is wrapped in it. Then make it pass through drawing dies with diameters of 4.0, 3.6, 3.3, and 3.2 respectively, draw and reduce the diameter one by one, and fina...

Embodiment 3

[0026] The composition of a high-boron iron-based wear-resistant surfacing flux-cored welding wire, according to the mass of the core powder elements in the welding wire: boron 12%, carbon 3%, manganese 1.0%, silicon 0.5%, and the balance is iron. 14× 0.3 (width 14mm, thickness 0.3mm) H08A cold-rolled steel strip. Roll it into a U shape first. 400 grams of boron carbide powder, 35 grams of high-carbon ferromanganese, 29 grams of 45# ferrosilicon, and 518 grams of metal iron powder are prepared into medicated powder. The particle size of the obtained powder is such that it can pass through an 80-mesh sieve. Put the various powders taken into the powder mixer and mix for 40 minutes, then add the mixed powder into the U-shaped H08A cold-rolled steel strip groove, the filling rate is 40%, close the U-shaped groove, so that the powder is wrapped in it. Then make it pass through drawing dies with diameters of 4.0, 3.6, 3.3, and 3.2 respectively, draw and reduce the diameter one by...

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Abstract

The invention relates to a high-boron iron-based wear-resistant surfacing flux-cored welding wire. The welding wire is composed of a low-carbon steel sheath and core powder, and is characterized in that the iron element in the low-carbon steel sheath and the core powder, and the iron element in the core powder Elements include boron, carbon, manganese, and silicon. The weight percentage of boron, carbon, manganese, and silicon in the core powder is: boron 6-12%, carbon 0.1-3%, manganese 0.6-2%, silicon 0.3-1.5%, the balance is iron. It may also include 0.3-3.5% of Ti, 0.6-2% of Mn, 0.3-1.5% of Si, 0-1% of molybdenum, 0-1% of K / Na modifier, and 0-1.5% of aluminum-magnesium alloy. The high-boron iron-based wear-resistant surfacing flux-cored welding wire of the present invention mainly relies on boron, titanium, carbon and other alloy elements to form borides and a small amount of carbides to realize the wear resistance of the surfacing alloy, and by adding rare earth, nickel, Aluminum-magnesium alloys, etc. improve the comprehensive performance of surfacing alloys.

Description

technical field [0001] The invention relates to a high-boron iron-based wear-resistant surfacing flux-cored welding wire, which belongs to the field of welding materials. It can be widely used in mechanical wear-resistant parts in electric power, coal, metallurgical mines, chemical industry, machinery and other industries, for surfacing welding repair wear-resistant parts, such as coal mill rollers, water turbine blades, excavator bucket teeth, brick extruders Auger, reamer, etc. Background technique [0002] At present, the flux-cored welding wires for surfacing repair are generally high-chromium cast iron series, which contain alloying elements such as carbon, chromium, silicon, and manganese, and certain strong carbide-forming elements, such as tungsten, molybdenum, niobium, and vanadium. The wear resistance mainly depends on the composite carbide M7C3 formed by chromium in the surfacing layer on carbon and iron, and the NbC, WC, VC formed by strong carbide forming eleme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30
Inventor 蒋建敏贺定勇翟东训赵有恒王智慧周正王国红崔丽李晓延
Owner BEIJING UNIV OF TECH
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