Iron-based alloy powder, laser cladding coating and preparation method of iron-based alloy powder

An iron-based alloy, laser cladding technology, applied in the direction of metal material coating process, coating, etc., can solve the problems of deterioration of material corrosion resistance, reduction of material corrosion resistance, reduction of coating toughness, etc., to reduce corrosion performance. Deterioration, improvement of corrosion resistance, and effect of suppressing cracking

Pending Publication Date: 2022-04-29
上交(徐州)新材料研究院有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of particles reduces the toughness of the coating, and there is a certain difference in physical properties between the second phase and the matrix, which will cause a greater tendency to crack; at the same time, the second phase particles often have a certain potential with the metal matrix. Poor, it will form the primary battery corrosion and reduce the corrosion resistance of the material; the interface area between the second phase particles and the matrix will also deteriorate the corrosion resistance of the material due to micro-defects, element segregation, etc.

Method used

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  • Iron-based alloy powder, laser cladding coating and preparation method of iron-based alloy powder
  • Iron-based alloy powder, laser cladding coating and preparation method of iron-based alloy powder
  • Iron-based alloy powder, laser cladding coating and preparation method of iron-based alloy powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Preparation of iron-based alloy powder

[0032] The iron-based alloy powder is prepared by a gas atomization method, and the iron-based alloy powder is composed of the following elements in mass percentage: C is 1.5-3.0%, Si is 0.5-1.5%, Cr is 16-18%, and Ni is 1-4%, Mo is 1-3%, Mn is 0.2-1%, the total amount of Nb and V is 0.2-1%, and the rest is Fe. The grain size of the iron-based alloy powder is 53-150 μm.

[0033] 2. Preparation of laser cladding coating

[0034] Using a laser cladding machine, with argon as the protective gas, laser as the heat source, powder feeding in the form of a cone-shaped powder beam, the scanning speed is controlled at 2-7mm / s, the laser power is 1-5kW, and the powder feeding rate is 10- 20g / min, use the heat generated by the laser beam to melt the surface of the substrate and the iron-based alloy powder in step 1.1 to form a single cladding layer on the surface of the substrate, repeat the previous steps to obtain multiple cladding l...

Embodiment 2

[0036] 1. Preparation of iron-based alloy powder

[0037] The specific method is the same as step 1 in Example 1, the difference is that the composition of the iron-based alloy powder is: C is 2.0%, Si is 0.75%, Cr is 17%, Ni is 3%, and Mo is 2%. , Mn is 1%, the total amount of Nb and V is 1%, the rest is Fe, and the particle size of the iron-based alloy powder is 53-150 μm.

[0038] 2. Preparation of laser cladding coating

[0039]The specific method is the same as step 2 in Example 1, the difference is that 42CrMo steel is selected as the substrate, and the size of the substrate is 200mm×80mm×20mm. The surface of the substrate is polished with a grinder before cladding, and then cleaned with acetone; Power semiconductor laser cladding system (Laserline LDF-8000), control scanning speed 4mm / s, laser power 2kW, powder feeding rate about 12g / min, to obtain laser cladding coating with two cladding layers.

[0040] Such as figure 1 As shown, the thickness of the laser cladding...

Embodiment 3

[0043] 1. Preparation of iron-based alloy powder

[0044] The specific method is the same as step 1 in Example 2, except that the composition of the iron-based alloy powder is: C is 1.5%, Si is 1.5%, Cr is 16%, Ni is 4%, and Mo is 3%. , Mn is 1%, the total amount of Nb and V is 0.2%, the rest is Fe, and the particle size of the iron-based alloy powder is 53-150 μm.

[0045] 2. Preparation of laser cladding coating

[0046] The specific method is the same as step 2 in Example 2, the difference is that during laser cladding, the scanning speed is controlled to 6mm / s, the laser power is 3kW, and the powder feeding rate is about 15g / min to obtain a single-pass laser cladding coating. layer, the thickness of the coating is 1.2mm, the dilution rate of the substrate is 2.1%, and the hardness of the coating is 55HRC.

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Abstract

The invention discloses iron-based alloy powder, a laser cladding coating and a preparation method of the iron-based alloy powder and the laser cladding coating. The iron-based alloy powder is composed of, by mass, 1.5%-3.0% of C, 0.5%-1.5% of Si, 16%-18% of Cr, 1%-4% of Ni, 1%-3% of Mo, 0.2%-1% of Mn, 0.2%-1% of the total amount of Nb and V and the balance Fe. According to the invention, the laser cladding coating is formed by adopting the iron-based alloy powder and a laser cladding process, so that good balance of wear resistance, corrosion resistance and cracking resistance can be realized.

Description

technical field [0001] The invention belongs to the technical field of laser cladding, and in particular relates to an iron-based alloy powder, a laser cladding coating and a preparation method thereof. Background technique [0002] Laser cladding is a new type of surface modification technology. It uses a high-power-density laser beam as a heat source to melt the powder that is preset on the surface of the substrate or fed in synchronously, and melts a certain surface of the substrate at the same time. After solidification Forms a coating with good metallurgical bonding on the surface of the substrate. A shallow molten pool is formed on the surface of the molten metal substrate, and powder materials generally enter the molten pool by pre-coating on the surface of the metal substrate or by synchronous feeding. The molten pool and the molten powder material are then cooled and solidified to form a coating on the surface of the metal substrate. [0003] With the development ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/56C22C38/48C22C38/46B22F1/00B22F9/08C23C24/10
CPCC22C38/02C22C38/04C22C38/44C22C38/56C22C38/48C22C38/46B22F9/082C23C24/103
Inventor 李铸国冯悦峤徐筱慧王端韩立华常通
Owner 上交(徐州)新材料研究院有限公司
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