Alloy powder for laser cladding and preparation method thereof

A technology of alloy powder and laser cladding, which is applied in metal processing equipment, metal material coating technology, transportation and packaging, etc., can solve the problems of long time required for full melting, poor weldability of alloy powder, and easy dispersion of alloy powder, etc. Achieve the effects of reducing heat absorption requirements, enhancing hardness and wear resistance, and improving cladding efficiency

Pending Publication Date: 2019-11-22
SHANDONG ENERGY HEAVY EQUIP GRP DAZU REMANUFACTURING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the number of alloy powders is mostly 50-300 mesh, and the particle size is 80-150 μm. During the laser cladding process, in order to ensure that the particles are fully and completely melted and combined with the matrix metallurgy, the scanning speed is generally 5-30mm / s, the cladding rate is 0.7-3d㎡, and the alloy powder has poor weldability and low viscosity. If the gas injection speed of the anti-oxidation gas nozzle used in conjunction with the injection of the alloy powder in the laser cladding process is not well controlled, the alloy powder Easy to disperse, difficult to apply finely
Moreover, the powder particles are larger, and it takes a long time to fully melt, resulting in slower scanning speed and lower cladding rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of alloy powder for laser cladding is a melting-inert gas atomization method, which is guaranteed to be carried out in a vacuum state, and contains the following formula components in mass percentages:

[0030] C 0.05%, Si 0.8%, Cr 15.7%, Ni 2.45%, Mo 0.31%, Co 0.28%, V 0.01%, and the rest is Fe.

[0031] Follow the steps below:

[0032] (1) Weigh the ingredients of the formula and mix them to obtain a mixture A, put the mixture A into a melting crucible, then heat it to 1500° C. for melting under the protection of argon, and keep it warm for 20 minutes to obtain a melt of the mixture A;

[0033] (2) Pour the melt of mixture A into an insulated crucible, and carry out gas atomization through a restricted supersonic nozzle and a draft tube to obtain mixture B, the gas medium of the gas atomization is argon, and the gas atomization of the gas atomization The pressure is 5Mpa;

[0034] (3) Collect and dry the mixture B, and perform powder mixing trea...

Embodiment 2

[0036] A preparation method of alloy powder for laser cladding is a melting-inert gas atomization method, which is guaranteed to be carried out in a vacuum state, and contains the following formula components in mass percentages:

[0037] C 0.09%, Si 1.18%, Cr 17.86%, Ni 3.38%, Mo 0.5%, Co 0.32%, V 0.02%, and the balance is Fe.

[0038] Follow the steps below:

[0039] (1) Weigh the ingredients of the formula and mix them to obtain a mixture A, put the mixture A into a melting crucible, then heat it to 1580° C. for melting under the protection of argon, keep it warm for 20 minutes, and obtain the melt of the mixture A;

[0040] (2) Pour the melt of mixture A into an insulated crucible, and carry out gas atomization through a restricted supersonic nozzle and a draft tube to obtain mixture B, the gas medium of the gas atomization is argon, and the gas atomization of the gas atomization The pressure is 8Mpa;

[0041] (3) Collect and dry the mixture B, and perform powder mixing ...

Embodiment 3

[0043] A preparation method of alloy powder for laser cladding is a melting-inert gas atomization method, which is guaranteed to be carried out in a vacuum state, and contains the following formula components in mass percentages:

[0044] C 0.08%, Si 0.98%, Cr 17.50%, Ni 3.30%, Mo 0.4%, Co 0.30%, V 0.02%, and the balance is Fe.

[0045] Follow the steps below:

[0046] (1) Weigh the ingredients of the formula and mix them to obtain a mixture A, put the mixture A into a melting crucible, then heat it to 1600° C. for melting under the protection of argon, keep it warm for 17 minutes, and obtain the melt of the mixture A;

[0047] (2) Pour the melt of mixture A into an insulated crucible, and carry out gas atomization through a restricted supersonic nozzle and a draft tube to obtain mixture B, the gas medium of the gas atomization is argon, and the gas atomization of the gas atomization The pressure is 5Mpa;

[0048](3) Collect and dry the mixture B, and perform powder mixing t...

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Abstract

The invention discloses alloy powder for laser cladding. The alloy powder comprises the following components in percentage by mass: 0.05-0.09% of C, 0.8-1.18% of Si, 15.7%-17.86% of Cr, 2.45%-3.38% ofNi, 0.31%-0.5% of Mo, 0.28%-0.32% of Co, 0.01%-0.02% of V and the balance Fe. The alloy powder has the advantages of being small in particle size, large in specific surface area, and capable of reducing heat absorption requirements; and lower laser power can be used to reduce the heat influence on a substrate, and cladding processing precision, scanning speed and cladding efficiency are obviouslyimproved.

Description

technical field [0001] The invention belongs to the technical field of laser cladding, and in particular relates to an alloy powder for laser cladding and a preparation method thereof. Background technique [0002] Laser cladding technology, as a new surface modification technology, uses high-energy-density laser beams to melt and rapidly solidify the substrate surface and alloy powder at the same time to form a metallurgically bonded cladding layer, which can significantly improve the substrate surface. Wear resistance, corrosion resistance, heat resistance and oxidation resistance are widely used in the fields of material surface modification, product surface repair and rapid prototyping. In this process, on the one hand, the added alloy powder melts on the interface of the base material and mixes with the partially melted base material to form a mixed adhesive layer. Therefore, the adhesiveness between the base material and the alloy coating material directly affects Coa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C38/52C22C38/46C22C38/44C22C38/02C22C33/02B22F9/08B22F1/00
CPCC23C24/106C22C38/52C22C38/46C22C38/44C22C38/02C22C33/0285B22F9/082B22F2009/0824B22F2009/0844B22F2009/0848B22F2009/088B22F1/05
Inventor 澹台凡亮杨庆东田洪芳杨帆杜学芸侯庆玲
Owner SHANDONG ENERGY HEAVY EQUIP GRP DAZU REMANUFACTURING CO LTD
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