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Plasma arc overlaying alloy powder used for heat-working die

A technology of alloy powder and hot work die, applied in the field of welding materials, to achieve the effect of improving fatigue resistance, good toughness and high cleanliness

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

[0007] Plasma arc surfacing is used for repairing and remanufacturing of hot work molds. The surfacing metal must meet the technical requirements of hot work molds with excellent high temperature oxidation resistance, good wear resistance, high cleanliness, and good fatigue resistance. Currently, it is specially used for hot work molds. The alloy powder for mold surfacing is less, and the research and development of alloy powder for hot work mold plasma arc surfacing is of great significance for improving the life of hot work molds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] (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 electrolytic manganese, 45# ferrosilicon, ferro-titanium, metallic chromium, high-carbon ferrochrome, ferro-vanadium, ferro-molybdenum, tungsten powder, nickel powder, nano-chromium nitride powder, yttrium oxide powder, and mist The iron powder 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 medicinal powder.

[0058] Wherein: the proportioning of said powder is as follows in terms of mass percentage: 0.5% of electrolytic manganese, 1% of 45# ferrosilicon, 6% of titanium iron, 6% of metal chromium, 10% of high carbon ferrochrome, 2% of ferrovanadium, ferromolybdenum 8%, tung...

Embodiment 2

[0062] (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, And the atomized iron powder is weighed according to the formula ratio and added to the non-alloy mixed powder, and then the powder is mixed for 8 minutes to obtain the medicinal powder.

[0063] Wherein: the proportioning of described medicated powder is as follows in mass percent: electrolytic manganese 1%, 45# ferrosilicon 2%, titanium iron 10%, metal chromium 10%, high carbon ferrochrome 12%, graphite 2%, vanadium iron 4% %, molybden...

Embodiment 3

[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 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, And the atomized iron powder is weighed according to the formula ratio and added to the non-alloy mixed powder, and the powder is mixed for another 9 minutes to obtain the medicinal powder.

[0068] Wherein: the proportioning of described medicated powder is as follows in mass percent: electrolytic manganese 1.5%, 45# ferrosilicon 2%, titanium iron 8%, metal chromium 7%, high carbon ferrochrome 10%, graphite 2%, vanadium iron 3% %, molybd...

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Abstract

The invention provides plasma arc overlaying alloy powder used for a heat-working die. The overlaying alloy powder is iron-base alloy powder; the raw material comprises, by mass, 1%-2% of nano chromium nitride powder and 2%-5% of yttrium oxide powder. By adding the nano chromium nitride powder into the iron-base alloy powder, fine nitride interstitial phases are formed in overlaying metal, and the overlaying metal is made to be good in toughness and crack resistance; meanwhile, the yttrium oxide is added into the alloy powder, so that the overlaying metal and glomeration inclusion are purified, nitride strengthening phases are promoted to form, and the fatigue resistance of the overlaying metal is improved. The heat-working die is repaired through the alloy power in combination with the plasma arc overlaying technique, the obtained overlaying metal is excellent in high-temperature oxidation resistance, abrasive resistance and cleanliness and is good in fatigue resistance.

Description

technical field [0001] The invention belongs to the field of welding materials, in particular to a plasma arc surfacing alloy powder used for hot-working molds. Background technique [0002] In recent years, with the rapid development of my country's 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. It is one of the consumable parts widely used in production. During use, the mold will fail due to peeling, scratches, wear, etc. due to wear and thermal fatigue. Repairing and remanufacturing scrapped molds is of great significance for reducing energy and material consumption, environmental protection, reducing production costs of enterprises, and improving competitiveness. At present, surfacing welding is the main method for mold repairing and remanufacturing. [0003] Plasma arc surfacing has strong controllability of penetration depth, high deposition speed, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40B23K10/02
CPCB23K10/027B23K35/3053B23K35/40
Inventor 孙俊生王洪权王光乐赵乐平
Owner SHANDONG UNIV
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