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Titanium-modified high-chromium cast iron type self-protection surfacing flux-cored wire and preparation method thereof

A high-chromium cast iron, self-protection technology, applied in welding equipment, welding medium, manufacturing tools, etc., to achieve the effect of simple and reliable preparation method, high deposition efficiency, and high degree of alloy homogeneity

Active Publication Date: 2016-12-21
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no technical disclosure on improving the self-protection effect of welding wire by controlling the particle size of components

Method used

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  • Titanium-modified high-chromium cast iron type self-protection surfacing flux-cored wire and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]A titanium-modified high-chromium cast iron type self-shielding surfacing flux-cored welding wire, including a low-carbon steel strip and a flux core, the flux core is filled in the steel strip, and the composition of the flux core is prepared according to the following quality: 60g of 80-mesh high-carbon chromium Iron, 26g of 80 mesh titanium iron, 0.5g of 60 mesh graphite, 1g of 200 mesh graphite, 3g of 60 mesh aluminum magnesium alloy, 1g of 200 mesh aluminum magnesium alloy, 5g of 60 mesh silicon manganese alloy, 2g of 200 mesh silicon Manganese alloy, 1.5g of 80 mesh iron powder. Put the various powders taken into the powder mixer, mix for 40 minutes, then add the mixed powder into the U-shaped 21×0.5mm H08A carbon steel belt groove, and the filling rate is 50%. Then close the U-shaped groove so that the powder is wrapped therein. Then make it pass through one or more of the wire drawing dies with diameters of 4.2mm, 3.8mm, 3.5mm, 3.2mm, and 2.8mm, draw and reduce ...

Embodiment 2

[0036] A titanium-modified high-chromium cast iron type self-shielding surfacing flux-cored welding wire, including a low-carbon steel strip and a flux core, the flux core is filled in the steel strip, and the composition of the flux core is prepared according to the following quality: 55g of 80-mesh high-carbon chromium Iron, 32g of 80 mesh titanium iron, 1g of 60 mesh graphite, 2g of 200 mesh graphite, 1g of 60 mesh aluminum magnesium alloy, 2g of 200 mesh aluminum magnesium alloy, 2g of 60 mesh silicon manganese alloy, 3g of 200 mesh silicon manganese Alloy, 2g of 80 mesh iron powder. The various powders taken are put into the powder mixer, mixed for 40 minutes, and then the mixed powder is added into the U-shaped 21×0.5mm H08A carbon steel belt groove, and the filling rate is 55%. Then close the U-shaped groove so that the powder is wrapped therein. Then make it pass through one or more of the wire drawing dies with diameters of 4.2mm, 3.8mm, 3.5mm, 3.2mm, and 2.8mm, draw...

Embodiment 3

[0038] A titanium-modified high-chromium cast iron type self-shielding surfacing flux-cored welding wire, including a low-carbon steel strip and a flux core, the flux core is filled in the steel strip, and the composition of the flux core is prepared according to the following quality: 58g of 80-mesh high-carbon chromium Iron, 28g of 80-mesh ferrotitanium, 0.8g of 60-mesh graphite, 1.2g of 200-mesh graphite, 2g of 60-mesh aluminum-magnesium alloy, 1.5g of 200-mesh aluminum-magnesium alloy, 3g of 60-mesh silicon-manganese alloy, 2.5g of 200 mesh silicon manganese alloy, 3g of 80 mesh iron powder. Put the various powders taken into the powder mixer, mix for 40 minutes, then add the mixed powder into the U-shaped 21×0.5mm H08A carbon steel belt groove, and the filling rate is 53%. Then close the U-shaped groove so that the powder is wrapped therein. Then make it pass through one or more of the wire drawing dies with diameters of 4.2mm, 3.8mm, 3.5mm, 3.2mm, and 2.8mm, draw and re...

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Abstract

The invention discloses a titanium-modified high-chromium cast iron type self-protection surfacing flux-cored wire and a preparation method thereof. The wire comprises a low-carbon steel strip and a flux core, wherein the flux core consists of the following components in percentage by mass: 55-60wt% of high-carbon ferrochromium, 26-32wt% of ferrotitanium, 0.5-1wt% of 60-mesh graphite, 1-2wt% of 200-mesh graohite, 1-3wt% of 60-mesh aluminum magnesium alloy, 1-2wt% of 200-mesh aluminum magnesium alloy, 2-5wt% of 60-mesh silicon manganese alloy, 2-3wt% of 200-mesh silicon manganese alloy and the balance iron powder. According to the wire disclosed by the invention, flux core components with different grain sizes are added, so that good welding process properties are guaranteed; a proper amount of Ti is added into the flux core, so that high chromium cast iron is changed into a hypo eutectic structure from a hypereutectic structure, toughness of a surfacing layer is obviously improved, hardness is high, and wear resistance is extremely good; and moreover, welding process properties are good, deposition efficiency is high, and slag removal is not needed for multi-layer welding.

Description

technical field [0001] The invention belongs to the field of welding in material processing engineering, and in particular relates to a titanium-modified high-chromium cast iron type self-protection surfacing flux-cored welding wire and a preparation method thereof. Background technique [0002] As a green manufacturing process, surfacing welding is widely used in the repair or remanufacture of various wear-resistant parts. Due to low cost and easy preparation, Cr 7 C 3 High-chromium cast iron surfacing alloys with type carbides as wear-resistant skeletons are widely used. Coarse Cr in hypereutectic structure of high chromium cast iron surfacing alloy 7 C 3 Type carbide, on the one hand, is beneficial to improve wear resistance, on the other hand, it is prone to metallurgical defects and microcracks, and is very brittle, which becomes an important reason why surfacing alloys develop into macrocracks or even cracks during service. . Therefore, overcoming the defects of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/32B23K35/40
CPCB23K35/32B23K35/40
Inventor 吴铭方刘大双魏萍
Owner JIANGSU UNIV OF SCI & TECH
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