Special flux-cored wire for hot-working die repairing surfacing

A technology of flux-cored welding wire and welding wire tube, which is used in welding equipment, manufacturing tools, welding media, etc.

Active Publication Date: 2015-11-18
SHANDONG UNIV
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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

[0063] (1) Mixing the powder Weigh the powder according to the ratio of the powder formula, first mix the rutile, potassium feldspar, sodium fluorosilicate, and fluorite powder with a small specific gravity according to the formula ratio, and mix them with the existing powder mixer powdered for 8 minutes to obtain mixed powder of slag-forming agent; The deoxidizing alloying agent such as yttrium oxide powder is weighed according to the formula ratio, and then added to the mixed powder of the slagging agent, and the powder is mixed for another 8 minutes to obtain the medicinal powder.

[0064] 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 4, 45# ferrosilicon 3, ferro-titanium 2, metallic chromium 20, high-carbon ferrochrome 20, vanadium Iron 2, molybdenum iron 12, tungsten powder 2, nickel powder 4, nano-chromium n...

Embodiment 2

[0070] (1) Mixing the powder Weigh the powder according to the ratio of the powder formula, first mix the graphite, rutile, potassium feldspar, sodium fluorosilicate, and fluorite powder with a small specific gravity according to the formula ratio, and use the existing mixed powder Machine mixed powder for 10 minutes to obtain non-alloy mixed powder; then electrolytic manganese, 45# ferrosilicon, ferrotitanium, metallic chromium, high carbon ferrochromium, ferrovanadium, ferromolybdenum, tungsten powder, nickel powder, nano-chromium nitride powder , yttrium oxide powder and other deoxidizing alloying agents are weighed according to the formula ratio and added to the non-alloy mixed powder, and then continue to mix the powder for 8 minutes to obtain the medicinal powder.

[0071] 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 ...

Embodiment 3

[0077] (1) Mixing the powder Weigh the powder according to the ratio of the powder formula, first mix the graphite, rutile, potassium feldspar, sodium fluorosilicate, and fluorite powder with a small specific gravity according to the formula ratio, and use the existing mixed powder Mix the powder by machine for 9 minutes to obtain non-alloy mixed powder; then mix 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 other deoxidizing alloying agents are weighed according to the formula ratio and added to the non-alloy mixed powder, and then continue to mix the powder for 9 minutes to obtain the medicinal powder.

[0078] 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: elec...

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Abstract

The invention provides a special flux-cored wire for hot-working die repairing surfacing. The special flux-cored wire comprises the wire tube wall and powder covered by the wire tube wall, wherein the powder comprises a deoxidation alloying agent and a slag former; by adding nanometer chromium nitride powder into iron-base alloy powder, a thin nitride interstitial phase is formed in the deposited metal, so that the deposited metal has good tenacity and anti-cracking capacity; meanwhile, yttria is added into the alloy powder, so that the deposited metal is purified, the occluded foreign substances are nodulized, the nitride strengthening phase is formed, and the anti-fatigue performance of the deposited metal is improved; by adopting the gas metal arc welding technology combining flux-cored wire and argon-rich gas protection to repair the hot-working die, the obtained deposited metal has excellent high-temperature oxidation resistance, excellent abrasive resistance, excellent cleanliness and good anti-fatigue performance.

Description

technical field [0001] The invention belongs to the field of welding materials, and in particular relates to a special flux-cored welding wire 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 countries, and there are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/368B23K35/30B23K9/04B23K9/173B23K35/40
CPCB23K9/04B23K9/173B23K35/0266B23K35/3053B23K35/3601B23K35/368B23K35/406
Inventor 孙俊生
Owner SHANDONG UNIV
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