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Alloy powder homogenizing treatment method for flux-cored wire

A technology of homogenization treatment and flux-cored welding wire, applied in welding medium, welding equipment, metal processing equipment, etc., can solve the problems of the influence of molten gold quality, component segregation, poor fluidity, etc., to achieve uneven segregation and overall fluidity. The effect of changing and overall fluidity is good

Inactive Publication Date: 2019-02-12
SUZHOU U P WEAR RESISTANCE COMPOUND MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the need to mix a variety of powders, there are certain requirements for the particle size and fluidity of the powders, so as not to cause component segregation due to uneven mixing, or when making flux-cored welding wires due to poor powder fluidity, it is easy to cause wire breakage during wire drawing shrinkage And other issues
[0003] Powders for flux-cored wires cannot use too fine particle size, the main reason is that too fine powder usually has poor fluidity, which will affect the subsequent production process
However, if some powders need to be added in a small amount, if the normal particle size is used, the problem of uneven composition is likely to occur microscopically, which may affect the quality of molten gold
For example, the alloy powder or non-alloy powder used to refine the grains of molten gold cannot exert its grain refining effect if it cannot be evenly distributed inside the molten gold

Method used

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  • Alloy powder homogenizing treatment method for flux-cored wire
  • Alloy powder homogenizing treatment method for flux-cored wire
  • Alloy powder homogenizing treatment method for flux-cored wire

Examples

Experimental program
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Effect test

Embodiment 1

[0018] This embodiment is a method for homogenizing alloy powder for flux-cored welding wire, comprising the following steps:

[0019] S1, the particle size of the main raw material powder used maintains the original requirements, and the particle size of the secondary powder raw material that needs to be added in a small amount is required to be less than 100 mesh (fine powder), so as to be dispersed and mixed with the main raw material powder to form a powder raw material;

[0020] S2, the binder for granulation is a water glass solution diluted with water, depending on the viscosity of the water glass, it needs to be diluted with 20-70% water before use;

[0021] S3, put the binder and the powder raw material into the mixer for mixing, the weight percentage of the binder added to the powder raw material is less than 30%, so as to avoid the influence of too much binder on the welding quality;

[0022] S4, the binder and the powder raw materials are evenly mixed and taken out...

Embodiment 2

[0028] Ferro-niobium powder is added to the flux-cored welding wire containing niobium, high carbon and high chromium, and the standard particle size is changed from less than 50 mesh to fine powder less than 100 mesh, and it is granulated with some high-carbon ferrochrome powder. The ratio is as follows:

[0029] After mixing 1 kg of ferro-niobium fine powder with a particle size of less than 100 mesh, 1 kg of high-carbon ferrochrome powder and a small amount of arc stabilizer powder, granulating, sintering and crushing, sieve through a 50-mesh sieve;

[0030] After granulation, 2 kg of powder is mixed with 3 kg of high-carbon ferrochromium powder, and then coated with low-carbon steel skin to form a flux-cored welding wire. The powder is 50% of the flux-cored wire, and the wire diameter is 2.8mm.

[0031] The produced welding wire was made of fully molten gold test piece with the same welding parameters to analyze its metallographic microstructure. The results are shown in th...

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Abstract

The invention discloses an alloy powder homogenizing treatment method for a flux-cored wire. The alloy powder homogenizing treatment method comprises the following steps of: S1, keeping the basic requirements for the grain size of used primary raw material powder, and keeping the grain size of a to-be-added little secondary powder raw material to be smaller than 100 meshes, thereby forming a powdered raw material; S2, adopting a pelletizing adhesive which is a sodium silicate solution diluted by adding water, wherein the pelletizing adhesive needs to add with 20-70% of water to dilute for use;S3, adding the adhesive and the powdered raw material into a stirrer to stir, wherein adding amount of the adhesive and weight percentage of the powdered raw material are smaller than 30%; S4, uniformly mixing the adhesive with the powdered raw material to obtain a mixture, then, taking out the mixture to spread on a heat-resistant steel disc to sinter and dry; and S5, crushing and sieving to a required mesh number, using a 40-50-mesh screen to screen, thereby completing a pelletizing process for the screened powder. The alloy powder homogenizing treatment method realizes modifying flux-coredwire powder, and further improves uniformity of the added alloy, so that the expected grain refinement or other metallurgical effects are achieved.

Description

technical field [0001] The invention belongs to the field of welding wire technology, and in particular relates to a method for homogenizing alloy powder for flux-cored welding wire. Background technique [0002] The basic structure of flux-cored wire is made of alloy powder wrapped in iron sheet. If necessary, some non-alloy powder will be added to produce shielding gas or shielding slag shell to avoid excessive oxidation of molten gold. Due to the need to mix a variety of powders, there are certain requirements for the particle size and fluidity of the powders, so as not to cause component segregation due to uneven mixing, or when making flux-cored welding wires due to poor powder fluidity, it is easy to cause wire breakage during wire drawing shrinkage And other issues. [0003] Powders for flux-cored wires cannot use too fine particle size, the main reason is that too fine powder usually has poor fluidity, which will affect the subsequent production process. However, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/40B22F1/00
CPCB23K35/0266B23K35/40B22F1/105B22F1/14
Inventor 庄铭浩王永钦
Owner SUZHOU U P WEAR RESISTANCE COMPOUND MATERIALS
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