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Metal powder cored wire specially used for hot-working die repair

A metal powder core and welding wire technology, applied in the field of metal powder core welding wire, can solve problems such as gaps

Active Publication Date: 2015-11-25
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Deposited metal has excellent high-temperature oxidation resistance, good wear resistance, high cleanliness, and good fatigue resistance. Surfacing metal powder cored wire is an urgently needed welding material for mold manufacturing and repair and remanufacturing. At present, this type of metal powder cored wire in my country There is still a big gap between the performance and foreign countries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] (1) Dosing powder Weighing medicated powder according to the proportioning ratio of medicated powder formula, first mix the smaller potassium feldspar and sodium fluorosilicate according to the formula ratio, mix powder with existing powder mixing machine for 8 minutes, obtain Non-alloy mixed powder; then deoxidized alloys such as electrolytic manganese, 45# ferrosilicon, titanium ferro, metal chromium, high carbon ferrochrome, vanadium ferro, molybdenum, tungsten powder, nickel powder, nano-chromium nitride powder, yttrium oxide powder, etc. The agent is weighed according to the formula ratio and added to the non-alloy mixed powder, and the powder is mixed for another 10 minutes to obtain the medicated powder.

[0061] Wherein: the proportioning of said medicated powder is as follows in parts by mass: electrolytic manganese 4, 45# ferrosilicon 3, ferrotitanium 2, metallic chromium 30, high carbon ferrochrome 20, ferrovanadium 2, ferromolybdenum 12, tungsten powder 2, N...

Embodiment 2

[0067] (1) Mixing the powder Weigh the powder according to the ratio of the powder formula, first mix the graphite, potassium feldspar, and sodium fluorosilicate with a small specific gravity according to the formula ratio, and mix the powder with the existing powder mixer for 10 minutes , to obtain non-alloy mixed powder; then electrolytic manganese, 45# ferrosilicon, ferro-titanium, metallic chromium, high-carbon ferrochromium, ferrovanadium, ferromolybdenum, tungsten powder, nickel powder, nano-chromium nitride powder, yttrium oxide powder, etc. 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.

[0068] Wherein: the proportioning of said powder is as follows in parts by mass: electrolytic manganese 8, 45# ferrosilicon 6, titanium iron 4, metal chromium 35, high carbon ferrochrome 30, graphite 3, vanadium iron 6, molybdenum iron 18, tun...

Embodiment 3

[0074] (1) Mixing the powder Weigh the powder according to the ratio of the powder formula, first mix the graphite, potassium feldspar, and sodium fluorosilicate with a small specific gravity according to the formula ratio, and mix the powder with the existing powder mixer for 9 minutes , to obtain non-alloy mixed powder; then electrolytic manganese, 45# ferrosilicon, ferro-titanium, metallic chromium, high-carbon ferrochromium, ferrovanadium, ferromolybdenum, tungsten powder, nickel powder, nano-chromium nitride powder, yttrium oxide powder, etc. 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 proportioning of said powder is as follows in parts by mass: electrolytic manganese 6, 45# ferrosilicon 4, ferro-titanium 3, metallic chromium 30, high-carbon ferrochrome 25, graphite 3, ferro-vanadium 4, ferro-molybden...

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Abstract

The invention provides a metal powder cored wire specially used for hot-working die repair. The metal powder cored wire comprises a wire pipe wall and powder wrapped by the wire pipe wall. The powder is composed of, by mass, 4-8 parts of electrolytic manganese, 2-6 parts of 45# silicon iron, 1-4 parts of ferrotitanium, 20-35 parts of chromium metal, 20-30 parts of high-carbon ferro-chrome, 0-5 parts of graphite, 2-6 parts of ferrovanadium, 12-18 parts of ferromolybdenum, 2-4 parts of tungsten powder, 4-8 parts of nickel powder, 1-2 parts of nanometer chromium nitride powder, 2-6 parts of yttrium oxide powder, 1-2 parts of potassium feldspar and 1-4 parts of sodium fluosilicate. The nanometer chromium nitride powder is added, fine nitride interstitial phases are formed in deposited metal, and therefore the deposited metal has good toughness and anti-cracking capacity; yttrium oxide is added to the alloy powder, the deposited metal is purified, inclusions are nodulized, a nitride strengthening phase is promoted to be formed, and the anti-fatigue performance of the deposited metal is improved. A hot-working die is repaired through a gas metal arc welding technology in which the metal powder cored wire is combined with full-argon gas shielding. The obtained deposited metal has excellent high-temperature oxidation performance, abrasion resistance and cleanliness and good anti-fatigue performance.

Description

technical field [0001] The invention belongs to the field of welding materials, in particular to a metal powder-cored welding wire specially used for hot-working mold repair. 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 countries, and there are problems of low...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/24
CPCB23K35/24B23K35/3053
Inventor 孙俊生赵乐平王洪权王光乐
Owner SHANDONG UNIV
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