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A wear-resistant surfacing flux-cored welding wire with uniform hardness of deposited metal

A technology of uniform hardness and deposited metal, applied in metal processing equipment, welding equipment, welding medium, etc., can solve the problem that the melting rate of cored Chinese medicine powder particles is difficult to guarantee, and it is impossible to increase the wear resistance of surfacing welding and the hardness of deposited metal. Uneven distribution and other problems, to achieve the effect of uniform hardness distribution, grain refinement and uniform distribution

Active Publication Date: 2021-07-16
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1) Flux-cored welding wire is non-conductive due to the internal flux core layer, and the arc is easy to rotate along the surrounding steel skin, resulting in poor arc stability, difficult welding, and insufficient melting of the powder
[0006] 2) The arc is a moving heat source during welding. The welding process is a process of rapid melting, rapid cooling and solidification. The melting rate of the powder particles in the core is difficult to guarantee, the metallurgical reaction is insufficient, and the hardness distribution of the deposited metal is uneven, which cannot be achieved. The purpose of surfacing welding to enhance wear resistance
[0007] 3) Due to the agglomeration effect of graphite and other carbon sources, under the action of arc heat input and arc force, the carbides formed with metal elements are unevenly distributed, resulting in uneven hardness distribution of the entire workpiece, which cannot achieve the effect of surfacing welding to enhance wear resistance Purpose

Method used

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  • A wear-resistant surfacing flux-cored welding wire with uniform hardness of deposited metal
  • A wear-resistant surfacing flux-cored welding wire with uniform hardness of deposited metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 As shown, a wear-resistant surfacing flux-cored welding wire with uniform hardness of the deposited metal, on the cross section perpendicular to the length of the welding wire, the outer skin 1 includes an inner extension part 1-1, a flux core wrapping part 1-2 and an outer extension part 1- 3. The outer skin 1 first extends from the head to the tail in the horizontal direction for a while, then folds back 180° back to the head to form the inner extension 1-1, and then wraps the drug core wrapping part 1-2 and the inner extension 1-1 The head is closed, and then reversely extended to the outside of the drug core wrapping part 1-2 for a period of time, and then folded 180° back to the head of the inner extension part 1-1 and closed with the drug core wrapping part 1-2 to form the outer extension part 1-3 .

[0026] The drug core wrapping part 1-2 is circular, and the drug core 2 is filled in the drug core wrapping part 1-2.

[0027] The chemical compos...

Embodiment 2

[0029] Prepare the structural shape of the flux-cored wire according to Example 1.

[0030] The chemical composition and dosage of drug core 2 are calculated by mass percentage: 9% of nano-lanthanum hexaboride, 16% of FeCr30Si40-A silicon chromium alloy, 5% of hollow cage carbon microspheres, 11% of manganese fluoride, and 3% of potassium carbonate , and the balance is FHT100·25 reduced iron powder.

Embodiment 3

[0032] Prepare the structural shape of the flux-cored wire according to Example 1.

[0033] The chemical composition and dosage of drug core 2 are calculated by mass percentage: 7.5% of nano-lanthanum hexaboride, 13% of FeCr30Si40-A silicon chromium alloy, 4% of hollow cage carbon microspheres, 9.5% of manganese fluoride, and 2.5% of potassium carbonate , and the balance is FHT100·25 reduced iron powder.

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Abstract

The invention belongs to the technical field of welding materials, and relates to a wear-resistant surfacing flux-cored welding wire with uniform hardness of deposited metal. Including the sheath and the flux core, on the cross-section perpendicular to the length of the welding wire, the sheath has a special-shaped structure, the wrapping part of the flux core is circular, and the inner extension part and the outer extension part are integrally formed; the chemical composition and dosage of the flux core are based on mass percentage Calculated as: nanometer lanthanum hexaboride 6%‑9%, FeCr30Si40‑A silicon chromium alloy 10%‑16%, hollow cage carbon microspheres 3%‑5%, manganese fluoride 8%‑11%, potassium carbonate 2 %‑3%, the balance is FHT100·25 reduced iron powder. The invention increases the residence time of the liquid molten pool, the metallurgical reaction of the molten pool is sufficient, the hardness of the obtained deposited metal is high, the hardness distribution is uniform, and the wear resistance of the surfacing alloy layer is good.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a wear-resistant surfacing flux-cored welding wire with uniform hardness of deposited metal. Background technique [0002] Wear is one of the main causes of mechanical failure, such as vertical mill rollers and discs and squeeze rollers in cement plants, coal mill rollers and discs in thermal power plants, crusher hammers and drums, excavator shovel teeth, throwing The blades of the pill machine, etc., cannot be used due to local wear and damage during use, and the loss is huge. [0003] Flux-cored welding wire can be used to design welding wires with different uses by adjusting the type and proportion of the powder alloy elements in the core layer. The formula is flexible and changeable, which can realize automatic welding and welding efficiency. Strong, so it is widely used in the field of welding. Overlay welding technology is a commonly used surface mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/16B23K35/30B23K35/368B23K9/04
CPCB23K9/04B23K35/0266B23K35/3053B23K35/3605B23K35/368
Inventor 刘胜新陈永陈志民付雅迪王靖博袁红高纠永涛潘继民连明洋
Owner ZHENGZHOU UNIV
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