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A kind of self-shielding welding wire and preparation method thereof

A technology of self-protection and welding wire, which is applied in welding equipment, welding media, manufacturing tools, etc., can solve the problems of the limitation of the application range of self-protection welding wire, the difficulty of complete protection in the self-protection process, and the waste of welding wire welding, so as to reduce multiple processes , reduce requirements and avoid waste

Active Publication Date: 2018-02-13
GUIZHOU AEROSPACE KAIHONG SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But, in spite of this, the quality of the self-shielding welding wire in the prior art and the conditions required for welding treatment are relatively harsh, and the application range of the self-shielding welding wire is still limited. Furthermore, for the self-shielding welding wire, due to the carbon content Larger, it will still lead to the same defects as the gas shielded welding wire, making it difficult to protect the integrity of the self-protection process, which will cause spatter during the welding process, resulting in waste of welding wire welding and affecting the toughness of the weld

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A self-shielding welding wire, including a cortex and a flux core layer, the cortex is a steel strip, wherein the carbon content of the steel strip is 0.003%, and the composition of the flux core layer is calculated by mass percentage, and its raw materials are: aluminum powder 3.1%, metal fluoride 15%, silicon dioxide powder 0.7%, metal manganese 4%, metal nickel 7%, magnesium powder 9%, the balance is a mixture of ferrochrome and tungsten carbide, in which ferrochrome: tungsten carbide is 7:1, and ferrochrome The carbon content is 0.009%; and the drug core layer is filled in the skin layer, and the filling rate is 60%.

[0023] The metal fluoride is composed of fluorobarium lithium and magnesium fluoride, wherein the content of fluorobarium lithium in the metal fluoride is 41.3%.

[0024] The preparation method is as follows: including adding the drug core layer on the cortex, wrapping it with the cortex, and then sending it into an extrusion molding machine to extrud...

Embodiment 2

[0026] A self-shielding welding wire, including a cortex and a flux core layer, the cortex is a steel strip, wherein the carbon content of the steel strip is 0.01%, and the composition of the flux core layer is calculated by mass percentage, and its raw materials are: 4.5% aluminum powder, metal fluoride 20%, silicon dioxide powder 2.7%, metal manganese 8%, metal nickel 9%, magnesium powder 13%, the balance is a mixture of ferrochromium and tungsten carbide, in which ferrochrome: tungsten carbide is 8:1, and ferrochrome The carbon content is 0.03%; and the drug core layer is filled in the cortex with a filling rate of 73%.

[0027] The metal fluoride is composed of fluorobarium lithium and sodium fluoride, wherein the content of fluorobarium lithium in the metal fluoride is 59.7%.

[0028] The steel strip is a cold-rolled steel strip with a width of 24mm and a thickness of 0.5mm.

[0029] The preparation method is as follows: including adding the drug core layer on the cortex...

Embodiment 3

[0032] A self-shielding welding wire, including a cortex and a flux core layer, the cortex is a steel strip, wherein the carbon content of the steel strip is 0.007%, and the composition of the flux core layer is calculated by mass percentage, and its raw materials are: aluminum powder 3.9%, metal fluoride 18%, silicon dioxide powder 1.5%, metal manganese 5%, metal nickel 8%, magnesium powder 11%, the balance is a mixture of ferrochrome and tungsten carbide, in which ferrochrome: tungsten carbide is 9:1, and ferrochrome The carbon content is 0.015%; and the drug core layer is filled in the skin layer, and the filling rate is 68%.

[0033] The metal fluoride is composed of fluorobarium lithium and calcium fluoride, wherein the content of fluorobarium lithium in the metal fluoride is 48.5%.

[0034] The steel strip is a cold-rolled steel strip with a width of 24mm and a thickness of 0.5mm.

[0035] The steel strip contains the following chemical components in mass percentage: C:...

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Abstract

The invention relates to the technical field of welding wires, in particular to a self-shielded welding wire and a manufacturing method thereof. Through adding metal fluoride and limiting the carbon content of components of raw material, the spatter loss rate is decreased in the process of welding application, then waste of welding rods in welding treatment is avoided, and the toughness of welding seams is improved; especially, in combination with the reasonable proportion design of the components of the raw material, the welding wire can be applied under any conditions, and the requirement for strength can be met as well; when metal coating experiment treatment is performed at normal temperature or at the high temperature of 600 DEG C, the hardness (HRC) of the welding wire can reach above 60, the tensile strength of the manufactured welding wire reaches above 310 MPa, the elongation after breakage reaches above 41%, the hardness reaches 31 HRB-57 HRB, and the roughness reaches 0.2 micron-0.5 micron.

Description

technical field [0001] The invention relates to the technical field of welding wire, in particular to a self-shielding welding wire and a preparation method thereof. Background technique [0002] At present, hard surface surfacing materials are mainly divided into three directions: one is manual electrode, one is welding wire, and the other is strip welding strip. Among them, welding wire surfacing materials are divided into submerged arc welding wire and automatic welding wire. Protected flux-cored wire, self-shielded flux-cored wire is a kind of flux-cored wire that does not require additional gas or flux protection. It is a high-efficiency, material-saving, and low-cost flux-cored wire. There is no slag removal problem, and continuous welding can be realized; material saving: because the flux cored wire can save about 25% of the deposited metal; low cost: because it does not require gas or flux protection, thereby reducing production costs, but the piles on the market now...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/368B23K35/40
CPCB23K35/308B23K35/368B23K35/40
Inventor 张德远付伟刘小军安毕军郭寅斌李强
Owner GUIZHOU AEROSPACE KAIHONG SCI & TECH
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