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Anti-crack wear-resistant overlaying welding flux-cored wire and preparing method of anti-crack wear-resistant overlaying welding flux-cored wire

A flux-cored wire, anti-crack technology, applied in welding equipment, welding media, manufacturing tools, etc., can solve the problems of reduced protection effect of surfacing layer, macro cracks, etc., to ensure hardness and wear resistance, and improve hardenability. , the effect of avoiding cracks

Inactive Publication Date: 2014-12-17
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of anti-crack and wear-resistant surfacing welding flux-cored welding wire, which solves the problem that macro cracks will appear on the surfacing welding layer of the existing flux-cored welding wire, resulting in the reduction of the protective effect of the surfacing welding layer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] The specific steps of the preparation method of the above-mentioned anti-crack wear-resistant surfacing flux-cored welding wire are as follows:

[0032] Step 1, weigh Cr40%-50%, Ni3%-10%, Mn5%-10%, Si5%-10%, CaF 2 4%~10%, Li 2 CO 3 5% to 10%, Al / Mg alloy 10% to 15%, the balance is Fe, and the sum of the mass percentages of the above components is 100%;

[0033] Step 2, mixing the materials weighed in step 1 evenly, and then drying in a drying oven at a temperature of 200-400°C for 2-3 hours to obtain a drug core powder;

[0034] Step 3, place the H08A steel strip with a width of 14mm and a thickness of 0.3mm on the unloading machine of the flux-cored welding wire forming machine, roll the H08A steel strip into a U-shaped groove through the forming machine, and then add step 2 to the U-shaped groove to obtain Flux-core powder, the filling rate of the core powder is controlled to 25% to 30%, and then the U-shaped groove is rolled and closed by a molding machine, and dr...

Embodiment 1

[0037] Step 1, weigh Cr40%, Ni3%, Mn5%, Si5%, CaF respectively by mass percentage 2 4%, Li 2 CO 3 5%, Al / Mg alloy 10%, Fe28%, the sum of the mass percentages of the above components is 100%;

[0038] Step 2, mixing the materials weighed in step 1 evenly, and then drying in a drying oven at a temperature of 200°C for 2 hours to obtain a drug core powder;

[0039] Step 3, place the H08A steel strip with a width of 14mm and a thickness of 0.3mm on the unloading machine of the flux-cored welding wire forming machine, roll the H08A steel strip into a U-shaped groove through the forming machine, and then add step 2 to the U-shaped groove to obtain Flux core powder, the filling rate of the core powder is controlled to 25%, and then the U-shaped groove is rolled and closed by a molding machine, and drawn to 2.0mm to obtain a flux cored wire;

[0040] Step 4. Finally, use a wire drawing machine to straighten the flux-cored welding wire prepared in step 3, coil it into a disc, and se...

Embodiment 2

[0043] Step 1, weigh Cr45%, Ni5%, Mn7%, Si7%, CaF respectively by mass percentage 2 7%, Li 2 CO 3 7%, Al / Mg alloy 12%, Fe10%, the sum of the mass percentages of the above components is 100%;

[0044]Step 2, mixing the materials weighed in step 1 evenly, and then placing them in a drying oven for drying at a temperature of 250°C for 2.5 hours to obtain a drug core powder;

[0045] Step 3, place the H08A steel strip with a width of 14mm and a thickness of 0.3mm on the unloading machine of the flux-cored welding wire forming machine, roll the H08A steel strip into a U-shaped groove through the forming machine, and then add step 2 to the U-shaped groove to obtain The core powder of the core powder, the filling rate of the core powder is controlled to 28%, and then the U-shaped groove is rolled and closed by the forming machine, and it is drawn to 2.0mm to obtain the cored wire;

[0046] Step 4. Finally, use a wire drawing machine to straighten the flux-cored welding wire prepar...

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Abstract

The invention discloses an anti-crack wear-resistant overlaying welding flux-cored wire, which consists of a scarfskin and a flux core, wherein the flux core consists of the following ingredients in percentage by mass: 40 to 50 percent of Cr, 3 to 10 percent of Ni, 5 to 10 percent of Mn, 5 to 10 percent of Si, 4 to 10 percent of CaF2, 5 to 10 percent of Li2CO3, 10 to 15 percent of Al / Mg alloy and the balance Fe. The invention also discloses a preparing method of the anti-crack wear-resistant overlaying welding flux-cored wire. According to the method, flux-cored ingredients are uniformly mixed and are then dried, next, the dried flux-cored ingredients are added into a U-shaped groove rolled by an H08A steel band, then, roller compaction and closed straightening are carried out, finally, the straight pulling is carried out, and the anti-crack wear-resistant overlaying welding flux-cored wire is obtained after the packaging. The anti-crack wear-resistant overlaying welding flux-cored wire has the advantages that the hardness and the wearing resistance are ensured, meanwhile, the occurrence of overlaying welding layer cracks is avoided, an overlaying welding layer has certain toughness, better welding manufacturability is realized, welding spattering is little, and the deposition rate is high; the anti-crack wear-resistant overlaying welding flux-cored wire is suitable for automatic welding equipment, the production efficiency is higher, in addition, the preparing method is simple, and the operation is convenient.

Description

technical field [0001] The invention belongs to the technical field of welding materials and their preparation, and in particular relates to a crack-resistant wear-resistant surfacing flux-cored welding wire, and also relates to a preparation method of the flux-cored welding wire. the Background technique [0002] Among the main failure modes of mechanical parts, the proportion of failure due to wear accounts for 60%-80%. Therefore, it is of great practical significance to modify the surface of materials, improve wear resistance or repair materials that have failed to prolong their service life and improve economic benefits. [0003] Wear-resistant surfacing technology is a commonly used surface modification and repair method, which is mainly used in cement industry, iron and steel industry, electric power industry, mining and other industries. As a new generation of welding consumables, flux-cored wire has three advantages: high deposition rate and fast deposition speed; ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/40B23K35/30B23K35/04
CPCB23K35/3086B23K35/40
Inventor 张敏张明刘明志李继红
Owner XIAN UNIV OF TECH
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