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Self-protecting flux-cored wire for mould surfacing welding

A technology of flux-cored welding wire and self-protection, applied in welding medium, manufacturing tools, welding equipment, etc., can solve the problems of increasing the cost of welding auxiliary materials, harsh working environment for workers, and high labor intensity.

Active Publication Date: 2013-04-03
NANJING JIANG LIAN WELDING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The work efficiency of manual arc welding is low, the working environment of workers is harsh, the labor intensity is high, and the waste of materials is serious
Gas-shielded flux-cored arc welding requires additional shielding gas, which increases the cost of welding auxiliary materials, and the application occasions are also limited.

Method used

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  • Self-protecting flux-cored wire for mould surfacing welding
  • Self-protecting flux-cored wire for mould surfacing welding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh micro-carbon ferrochromium 15g; silicon-manganese alloy 10g; ferrotitanium 8g; graphite 4g; aluminum-magnesium alloy 3g; rutile 4g; cryolite 3g; , 2g tungsten powder, 34.5g iron powder. A total of 100g of powder. All the powders taken were passed through an 80-mesh sieve. Put all kinds of powders into the powder mixer and mix for 45 minutes, and then add the mixed powders into the U-shaped 12×0.5mm H08A carbon steel strip groove, and the filling rate is 30%. Then close the U-shaped groove to wrap the powder in it. Then make it pass through wire drawing dies with diameters of 4.10mm, 3.80mm, 3.45mm, 3.15mm, 2.85mm, 2.60mm and 2.40mm respectively, draw and reduce the diameter one by one, and finally obtain a product with a diameter of 2.4mm. Welding without gas protection, welding current is 450~550A, welding voltage is 28~34V, welding speed is 0.5m / min, interlayer temperature is controlled at 200~300℃, and 4 layers are surfacing. The hardness of the welding wir...

Embodiment 2

[0027] Weigh micro-carbon ferrochromium 18g; silicon-manganese alloy 12g; ferrotitanium 6g; graphite 3g; aluminum-magnesium alloy 2g; rutile 3g; cryolite 2g; aluminum oxide 4g; Tungsten powder 3g, iron powder 36g. A total of 100g of powder. All the powders taken were passed through an 80-mesh sieve. Put all kinds of powders into the powder mixer and mix for 45 minutes, and then add the mixed powders into the U-shaped 12×0.5mm H08A carbon steel strip groove, and the filling rate is 30%. Then close the U-shaped groove to wrap the powder in it. Then make it pass through wire drawing dies with diameters of 4.10mm, 3.80mm, 3.45mm, 3.15mm, 2.85mm, 2.60mm and 2.40mm respectively, draw and reduce the diameter one by one, and finally obtain a product with a diameter of 2.4mm. Welding without gas protection, welding current is 450~550A, welding voltage is 28~34V, welding speed is 0.5m / min, interlayer temperature is controlled at 200~300℃, and 4 layers are surfacing. The hardness of ...

Embodiment 3

[0029] Weigh micro-carbon ferrochromium 12g; silicon-manganese alloy 11g; titanium ferrous 7g; graphite 2g; aluminum-magnesium alloy 5g; rutile 5g; cryolite 1g; , 3g tungsten powder, 43.2g iron powder. A total of 100g of powder. All the powders taken were passed through an 80-mesh sieve. Put all kinds of powders into the powder mixer and mix for 45 minutes, and then add the mixed powders into the U-shaped 12×0.5mm H08A carbon steel strip groove, and the filling rate is 30%. Then close the U-shaped groove to wrap the powder in it. Then make it pass through wire drawing dies with diameters of 4.10mm, 3.80mm, 3.45mm, 3.15mm, 2.85mm, 2.60mm and 2.40mm respectively, draw and reduce the diameter one by one, and finally obtain a product with a diameter of 2.4mm. Welding without gas protection, welding current is 450~550A, welding voltage is 28~34V, welding speed is 0.5m / min, interlayer temperature is controlled at 200~300℃, and 4 layers are surfacing. The hardness of the welding ...

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Abstract

The invention provides a self-protecting flux-cored wire for mould surfacing welding, which is manufactured by using a steel band as outer skin filled with a flux core, wherein the flux core comprises the following components in accordance with mass percent: 10 to 20% of micro-carbon ferro chrome, 8 to 15% of silicon-manganese alloy, 6 to 10% of ferrotitanium, 2 to 5% of graphite, 1 to 5% of aluminum-magnesium alloy, 3 to 5% of rutile, 1 to 3% of cryolite, 2 to 4% of aluminum oxide, 5 to 10% of ferro-molybdenum, 0.5 to 4% of ferrocolumbium, 0.1 to 3% of ferrovanadium, 1 to 3% of tungsten powder, and the balance of ferrous powder. On the basis of good deposited metal components and thermal fatigue resistant performance of the provided wire, the self-protecting flux-cored wire has the advantages of attractive appearance of welding seam forming, surface cleanness without dregs, good self-protecting effect in the welding process and the like.

Description

technical field [0001] The invention relates to a flux-cored welding wire, which belongs to the welding field in material processing engineering, and is suitable for repair welding of mold materials under the working conditions of cold and heat fatigue resistance, intermetal wear resistance, impact resistance and wear resistance. Background technique [0002] my country's mold manufacturing cycle is generally twice that of industrialized countries, and the service life is only two-fifths. Therefore, it is of great practical significance to improve the life of the mold and reduce the cost of the mold. With the rise of remanufacturing technology in recent years, the repair of molds by surfacing welding has gradually been valued, adopted and recognized by mold industry workers. Production practice has proved that surfacing repair or mold manufacturing greatly saves resources and reduces overall costs. At present, the welding material for mold surfacing welding is still mainly ...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/368
Inventor 刘仁培魏艳红刘大双
Owner NANJING JIANG LIAN WELDING TECH