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Anti-wear flux-cored wire, as well as preparation method and application thereof

A technology of flux-cored welding wire and flux core, applied in welding equipment, welding medium, manufacturing tools, etc., can solve the problems of low coating hardness, unsatisfactory coating, and increased cost of flux-cored welding wire

Active Publication Date: 2018-11-06
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this type of iron-based flux-cored wire has good weldability, the coating formed by arc spraying of this type of iron-based flux-cored wire has low hardness and poor wear resistance. Increase the amount of Co or WC to further improve the hardness and wear resistance of the iron-based flux-cored wire coating
However, due to the low content of Co and W in nature, if we rely on the increase of Co and W content to improve the wear resistance of the iron-based flux-cored wire coating, it is bound to increase the cost of the flux-cored wire, which cannot meet the needs of modern industrial production

Method used

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  • Anti-wear flux-cored wire, as well as preparation method and application thereof
  • Anti-wear flux-cored wire, as well as preparation method and application thereof
  • Anti-wear flux-cored wire, as well as preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0037] The present invention also provides a preparation method for the wear-resistant flux-cored welding wire described in the above technical solution, comprising the following steps:

[0038] (1) mixing the core raw materials of the wear-resistant flux-cored wire to obtain core powder;

[0039] (2) encapsulating the core powder obtained in the step (1) by using the sheath raw material to obtain a semi-finished product of wear-resistant flux-cored welding wire;

[0040] (3) Drawing the semi-finished wear-resistant flux-cored welding wire obtained in the step (2) to obtain a wear-resistant flux-cored welding wire.

[0041] The invention mixes the core raw materials of the wear-resistant flux-cored wire to obtain the core powder. In the present invention, the raw material of the flux core of the wear-resistant flux-cored wire is the same as the raw material for preparing the flux core described in the above technical solution, and will not be repeated here.

[0042] In the p...

Embodiment 1

[0050] Chemical composition of drug core: 9wt% molybdenum powder, 20wt% chromium powder, 1wt% nickel powder, 0.5wt% copper powder, 0.8wt% carbon powder, 0.5wt% boron-iron alloy powder, 2wt% titanium carbide powder, 3wt% niobium Iron alloy powder, 0.1wt% lanthanum oxide, 0.3wt% Si 3 N 4 Whiskers, the balance is iron powder. Among them, the particle size of lanthanum oxide is 3 μm; Si 3 N 4 The diameter of the whiskers is 0.2 μm; the particle size of the rest of the raw materials is 65 μm.

[0051] First dry the flux core naturally at 200°C and mix it; then package it with an ordinary low-carbon steel strip with a width of 14mm and a thickness of 0.5mm, the filling rate is 40%, and a semi-finished wear-resistant flux-cored wire with a diameter of 4.2mm is obtained; grading Draw to a diameter of 2.0 mm to obtain (Mo-Cr-Ni-Cu series) flux-cored welding wire.

[0052] Using Q235 steel as the base material, the surface of the base material is treated by sand blasting process to...

Embodiment 2

[0055] Prepare flux-cored welding wire and coating according to the method of Example 1, the difference is that the rare earth oxide is yttrium oxide with a particle size of 1 μm; the silicon-containing whiskers are SiC with a diameter of 0.2 μm; 70 μm; the thickness of the stainless steel strip is 0.3mm, the width is 15mm, and the filling rate of the drug core is 42%; the dosage and process parameters of the remaining components are shown in Tables 1 and 2.

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Abstract

The invention belongs to the technical field of flux-cored wires, and particularly relates to an anti-wear flux-cored wire, as well as a preparation method and application thereof. The anti-wear flux-cored wire comprises a skin and a flux core; and the flux core comprises the following raw materials: 9-55wt% of molybdenum powder, 5-30 wt% of chromium powder, 1-15 wt% of nickel powder, 0.5-3 wt% ofcopper powder, 0.3-1.2 wt% of carbon powder, 0.5-4 wt% of ferroboron alloy powder, 0.5-3 wt% of titanium carbide powder, 1-5 wt% of FeNb alloy powder, 0.1-2 wt% of rare earth oxide, 0.3-1.0 wt% of silicon containing whiskers, and the balance of iron powder. The anti-wear flux-cored wire is used as an arc electrode material to be sprayed, and a coating of which the hardness is larger than or equalto 820 (HV) can be obtained.

Description

technical field [0001] The invention belongs to the technical field of flux-cored welding wire, and in particular relates to a wear-resistant flux-cored welding wire and its preparation method and application. Background technique [0002] Abrasion is one of the common forms of failure of mechanical parts. Once the mechanical parts are worn, it will affect the normal use of the mechanical parts. Therefore, it is necessary to spray a protective layer on the surface of the mechanical parts to improve the durability of the mechanical parts. grinding performance. Arc spraying is a common way to form a protective coating. During arc spraying, the spraying effect is affected by many factors, and one of the most critical factors is the performance of the electrode material used as the sprayed coating material. [0003] Due to its high efficiency, low cost, and automatic production, flux-cored wire is often used as an electrode material for arc spraying, and is used to spray the su...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/30B23K35/3053B23K35/40
Inventor 潘应君常智敏
Owner WUHAN UNIV OF SCI & TECH
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