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A thin-diameter flux-cored welding wire specially used for surfacing welding for hot work mold repair

A technology of flux-cored welding wire and hot-working molds, which is applied in welding equipment, manufacturing tools, welding media, etc.

Active Publication Date: 2017-03-08
菏泽广泰耐磨制品股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is still a big gap between the performance of this type of flux-cored welding wire in my country and foreign countries.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] (1) Mixing the powder Weigh the powder according to the ratio of the powder formula, first mix the rutile, potassium feldspar, potassium fluorosilicate, and fluorite powder with a small specific gravity according to the formula ratio, and mix them with the existing powder mixer powder for 8 minutes to obtain mixed powder of slagging agent; then deoxidize electrolytic manganese, 45# ferrosilicon, ferrotitanium, chromium carbide, ferrovanadium, ferromolybdenum, tungsten powder, nickel powder, nano-chromium nitride powder, yttrium oxide powder, etc. The alloying agent is weighed according to the formula ratio and added to the mixed powder of the slagging agent, and the powder is mixed for another 8 minutes to obtain the powder.

[0062] Wherein: the medicated powder contains a deoxidizing alloying agent and a slagging agent, and the formula of the medicated powder deoxidizing alloying agent is as follows in parts by mass: electrolytic manganese 4, 45# ferrosilicon 3, ferrot...

Embodiment 2

[0068] (1) Mixing the powder Weigh the powder according to the ratio of the powder formula, first mix the graphite, rutile, potassium feldspar, potassium fluorosilicate, and fluorite powder with a small specific gravity according to the formula ratio, and then mix them with the existing mixed powder Mix the powder by machine for 10 minutes to obtain non-alloy mixed powder; The deoxidizing alloying agent is weighed according to the formula ratio and added to the non-alloy mixed powder, and the powder is mixed for another 8 minutes to obtain the medicinal powder.

[0069] Wherein: the medicated powder includes a deoxidizing alloying agent and a slagging agent, and the formula of the medicated powder deoxidizing alloying agent is as follows in parts by mass: electrolytic manganese 8, 45# ferrosilicon 6, ferrotitanium 4, chromium carbide 8, graphite 3, vanadium iron 6, Ferromolybdenum 18, tungsten powder 4, nickel powder 5, nano-chromium nitride powder 2, yttrium oxide powder 6; ...

Embodiment 3

[0074] (1) Mixing the powder Weigh the powder according to the ratio of the powder formula, first mix the graphite, rutile, potassium feldspar, potassium fluorosilicate, and fluorite powder with a small specific gravity according to the formula ratio, and then mix them with the existing mixed powder Mix the powder by machine for 9 minutes to obtain non-alloy mixed powder; The deoxidizing alloying agent is weighed according to the formula ratio and then added to the non-alloy mixed powder, and the powder is mixed for another 9 minutes to obtain the medicinal powder.

[0075] Wherein: the medicated powder includes a deoxidizing alloying agent and a slagging agent, and the formula of the medicated powder deoxidizing alloying agent is as follows in parts by mass: 6 electrolytic manganese, 45# ferrosilicon 4, 3 ferrotitanium, 6 chromium carbide, 3 graphite, 4 ferrovanadium, Ferromolybdenum 15, tungsten powder 3, nickel powder 6, nano-chromium nitride powder 1, yttrium oxide powder ...

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Abstract

The invention provides a special fine-diameter flux-cored wire for hot-working die repairing surfacing. The special fine-diameter flux-cored wire comprises a welding stick pipe wall and powder wrapped in the welding stick pipe wall. The powder comprises a deoxygenation alloying agent and a slag former. Nanometer chromium nitride powder is added in iron-based alloy powder, a fine nitride interstitial phase is formed in surfacing metal, and the surfacing metal has good tenacity and good crack resistance. Meanwhile, yttrium oxide is added in alloy powder, the surfacing metal is purified, balling is carried out on inclusions, a nitride strengthening phase is promoted to be formed, and the fatigue resistance of the surfacing metal is improved. A hot-working die is repaired through a gas metal arc welding technology with the cooperation of the flux-cored wire and rich-chlorine gas protection, and the obtained surfacing metal has the superior high-temperature oxidization resistance, the superior abrasion resistance, the superior cleanliness and the good fatigue resistance.

Description

technical field [0001] The invention belongs to the field of welding materials, and in particular relates to a thin-diameter flux-cored welding wire specially used for hot-work mold repair and surfacing welding. Background technique [0002] In recent years, with the rapid development of my country's metallurgical industry and manufacturing industry, the amount of dies, especially hot work dies, such as hot rolling work rolls, hot forging dies, hot extrusion dies, hot blanking dies, etc., is increasing. It has become one of the consumable parts widely used in industrial production. During use, the mold will fail due to peeling, scratches, wear, etc. due to wear and thermal fatigue. How to improve its service life has always been a research hotspot at home and abroad. The life of the mold mainly depends on the mold material, structural design, heat treatment process, processing and other aspects. The service life of molds in my country is only 1 / 2-1 / 3 of that of foreign cou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/22B23K35/40
CPCB23K35/22B23K35/3073B23K35/406
Inventor 孙俊生
Owner 菏泽广泰耐磨制品股份有限公司
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