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Preparation method of self-protective surfacing flux-cored welding wire

A technology of self-protection and flux, applied in the field of wear-resistant materials, can solve the problems of poor resistance to welding cracks, high carbon content, high cost, etc., and achieve good wear performance, reasonable formula, and stable organization.

Inactive Publication Date: 2020-02-21
湖北秦鸿新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high carbon content of such welding materials, they often have poor resistance to welding cracks and low toughness.
[0004] In the prior art, submerged arc welding wire or special flux-cored welding wire and flux for hard surface surfacing are mostly used in surfacing welding, which will cause the following problems: 1. The hardness of the surfacing layer is uneven and unstable; 2. There are cracks; 3. , wear resistance is not good, the cost is high, the above problems all restrict the development of hard surface surfacing flux cored wire

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of self-shielding surfacing welding flux-cored wire, comprising the following steps:

[0022] S1, 0.3% ferrochrome, 0.5% ferrosilicon, 2.8% chromium nitride, 1.5% smithsonite, 0.6% sodium fluoride, 0.6% potassium titanate, 1.5% titanium dioxide, 1.5% ferromanganese, and more The amount is iron, wherein nitrogen accounts for 0.15% of the weight of the whole drug powder, and the ingredients are carried out, and the raw materials are put into a vacuum induction furnace for smelting, and then poured into electrode rods;

[0023] S2, using electroslag remelting equipment, the surface of the electrode rod is polished and inserted into the slag as a consumable electrode, and the slag is made of CaF 2 、Al 2 o 3 , CaO slag system, CaF in slag system 2 The mass percentage content is 80%, Al 2 o 3 The mass percentage content of CaO is 12%, the mass percentage content of CaO is 4%, the current is 2100A, the steel ingot capping and feeding current is 900A, ...

Embodiment 2

[0029] A preparation method of self-shielding surfacing welding flux-cored wire, comprising the following steps:

[0030] S1, 0.5% by weight of ferrochrome, 0.6% of ferrosilicon, 2.5% of chromium nitride, 1% of smithsonite, 0.4% of sodium fluoride, 0.4% of potassium titanate, 0.5% of titanium dioxide, 1% of ferromanganese, and the rest The amount is iron, wherein nitrogen accounts for 0.13% of the weight of the whole medicine powder, and the ingredients are carried out, and the raw materials are put into a vacuum induction furnace for smelting, and then poured into electrode rods;

[0031] S2. Using electroslag remelting equipment, the surface of the electrode rod is polished and inserted into the slag as a consumable electrode. The slag is made of CaF 2 、Al 2 o 3 , CaO slag system, CaF in slag system 2 The mass percentage content is 75%, Al 2 o 3 The mass percentage content of CaO is 16%, the mass percentage content of CaO is 6%, the current is 2100A, the capping and fee...

Embodiment 3

[0038] A preparation method of self-shielding surfacing welding flux-cored wire, comprising the following steps:

[0039] S1, 0.2% by weight of ferrochrome, 0.8% of ferrosilicon, 3.5% of chromium nitride, 1% of smithsonite, 1.0% of sodium fluoride, 1.5% of potassium titanate, 0.5% of titanium dioxide, 1.8% of ferromanganese, and the rest The amount is iron, wherein nitrogen accounts for 0.1% of the weight of the whole drug powder, and the ingredients are carried out. After the raw materials are put into a vacuum induction furnace for smelting, they are poured into electrode rods;

[0040] S2. Using electroslag remelting equipment, the surface of the electrode rod is polished and inserted into the slag as a consumable electrode. The slag is made of CaF 2 、Al 2 o 3 , CaO slag system, CaF in slag system 2 The mass percentage content is 85%, Al 2 o 3 The mass percentage content of CaO is 18%, the mass percentage content of CaO is 4%, the current is 2200A, the capping and feed...

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Abstract

The invention belongs to the technical field of surfacing materials, and particularly relates to a preparation method of a self-protective surfacing flux-cored welding wire. The self-protective surfacing flux-cored welding wire is prepared from the alloy components in percentage by mass: 0.2-0.6% of ferrochrome, 0.4-0.8% of ferrosilicon, 2-3.5% of chromium nitride, 1-3% of smithsonite, 0.2-1.0% ofsodium fluoride, 0.2-1.5% of potassium titanate, 0.5-1.5% of titanium dioxide, 0.8-1.8% of ferromanganese, and the balance of iron, wherein nitrogen accounts for 0.1-0.15% of the total flux powder weight. The self-protective surfacing flux-cored welding wire obtained through electroslag remelting, cogging, annealing, acid pickling, coping, cold drawing and other processes after ingredients are smelted has good wear property and good red hardness, and peeling of a surfacing layer can be avoided.

Description

technical field [0001] The invention belongs to the technical field of wear-resistant materials, and in particular relates to a preparation method of self-protected surfacing welding flux-cored welding wire. Background technique [0002] Surfacing welding, as an economical and rapid process method for surface modification of materials, is more and more widely used in the manufacture and repair of parts in various industrial sectors. In order to play the role of the surfacing layer most effectively, it is hoped that the surfacing welding method adopted has a small dilution of the base metal, a high deposition speed and excellent performance of the surfacing layer, that is, high-quality, high-efficiency, low-dilution rate surfacing welding technology. [0003] At present, the commonly used wear-resistant surfacing materials contain high carbon and alloy elements, mainly using carbon and chromium, titanium, vanadium, niobium, etc. to form carbide hard points to increase the ha...

Claims

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Application Information

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IPC IPC(8): B23K35/40
CPCB23K35/40B23K35/406
Inventor 张轶
Owner 湖北秦鸿新材料有限公司
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