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316 L stainless steel spraying powder material and preparation method thereof

A technology of powder material and spray powder, which is applied in the field of 316L stainless steel spray powder material and its preparation, which can solve the problems of irregular coating, limit the application range of cold spray technology, damage of substrate, etc., and achieve the effect of good bonding performance

Inactive Publication Date: 2020-05-19
深圳市金中瑞通讯技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, cold spraying is only suitable for direct spraying of powdery spraying materials, not rod or filamentary spraying materials, which limits the application range of cold spraying technology
[0003] CN108480156A has provided a kind of new cold spraying technology (cold melting shot spraying technology), the binding force of the metal coating base material generated by this spraying method is stronger, and the change of physical and chemical properties is smaller, but when carrying out stainless steel spraying operation Because the hardness and other properties of traditional stainless steel are not up to standard, the substrate will be damaged during the spraying process. For example, the traditional 316L stainless steel powder not only has a large diameter, but also has magnetic properties and crystal structure after the diameter of the stainless steel powder becomes smaller. It is highlighted, which makes many problems such as poor adhesion after spraying, irregular coating, and low material utilization rate, making it difficult to produce effective coatings that can be used for industrial purposes.

Method used

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  • 316 L stainless steel spraying powder material and preparation method thereof
  • 316 L stainless steel spraying powder material and preparation method thereof
  • 316 L stainless steel spraying powder material and preparation method thereof

Examples

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Comparison scheme
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Embodiment 1

[0048] This embodiment provides a 316L stainless steel spray powder material, which includes the following components by mass percentage: Cr 16.5%, Ni 12.7%, Mo 2.8%, Mn 1%, Si 0.6%, C 0.01%, S 0.03% , P 0.03%, N2%, the balance is iron; the particle diameter length of the powder material is 3-5 μm; the hardness of the powder material is 130Hv; the particle out-of-roundness of the powder material is ≥ 80%; The relative magnetic permeability of the powder material is 1.010; the oxygen content of the powder material is ≤0.05%.

[0049] The preparation method of above-mentioned powder material comprises the steps:

[0050] (1) 316L stainless steel coarse powder with a particle size ≥ 100 μm is heated and vaporized at 1255 ° C into gas;

[0051] (2) atomizing and condensing the liquid obtained in step (1) at a temperature of 1215° C.; wherein the atomizing and condensing method is water-gas combined atomization;

[0052] (3) Sieving the product obtained in step (2); wherein, the ...

Embodiment 2

[0056] This embodiment provides a 316L stainless steel spraying powder material, which includes the following components by mass percentage: Cr 16.2%, Ni 10%, Mo 2%, Mn 1%, Si 0.8%, C 0.04%, S 0.02% , P 0.02%, N 1.5%, the balance is iron; the particle diameter length of the powder material is 4-8 μm; the hardness of the powder material is 180Hv; the particle out-of-roundness of the powder material is ≥ 70%; The relative magnetic permeability of the powder material is 1.009; the oxygen content of the powder material is ≤0.05%.

[0057] The preparation method of above-mentioned powder material comprises the steps:

[0058] (1) heating blocky 316L stainless steel coarse powder to liquid at 1300°C;

[0059] (2) atomizing and condensing the liquid obtained in step (1) at a temperature of 1200°C; wherein, the atomizing and condensing method is water-gas combined atomization;

[0060] (3) Sieving the product obtained in step (2); wherein, the mesh size of the sieving is 4-8 μm;

...

Embodiment 3

[0064] This embodiment provides a 316L stainless steel spray powder material, which includes the following components by mass percentage: Cr 17%, Ni 8%, Mo 3%, Mn 2%, Si 0.6%, C 0.02%, S 0.01% , P 0.01%, N 1.3%, the balance is iron; the particle diameter of the powder material is 7-10 μm; the hardness of the powder material is 220Hv; the particle out-of-roundness of the powder material is ≥ 90%; The relative magnetic permeability of the powder material is 1.015; the oxygen content of the powder material is ≤0.05%.

[0065] The preparation method of above-mentioned powder material comprises the steps:

[0066] 1) Heat 316L stainless steel coarse powder with particle size ≥ 300 μm to liquid at 1290°C;

[0067] (2) atomizing and condensing the liquid obtained in step (1) at a temperature of 1180°C; wherein, the atomizing and condensing method is water-gas combined atomization;

[0068] (3) sieving the product obtained in step (2); wherein, the sieve size of the sieve is 7-10 μm...

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Abstract

The invention relates to a 316 L stainless steel spraying powder material and a preparation method thereof. The 316 L stainless steel spraying powder material comprises the following components in percentage by mass: 16-18% of Cr, 8-14% of Ni, 2-3% of Mo, 1-2% of Mn, 0.5-1% of Si, 0.01-0.04% of C, 0.01-0.03% of S, 0.01-0.03% of P, 1.2-2% of N and the balance of Fe. According to the 316 L stainlesssteel spraying powder material, through strictly controlling the matching of all component in the powder, the topographic characteristics and other factors, an excellent effect can be realized on different base materials; and at the same time, when the 316 L stainless steel spraying powder material serves as an intermediate coat, other coating materials and a 316 L stainless steel powder coatingcan realize excellent combination.

Description

technical field [0001] The invention relates to the field of material surface engineering, in particular to a 316L stainless steel spray powder material and a preparation method thereof. Background technique [0002] At present, the commonly used surface spraying methods are mainly thermal spraying technology and cold spraying technology. Thermal spraying technology refers to using gas, liquid fuel or electric arc, plasma arc, laser, etc. To the molten or semi-molten state, through the power of the heat source itself, or an external high-speed airflow to atomize it, spray it on the surface of the pretreated workpiece at a certain speed to form a firmly adhered surface layer. The cold spraying technology is a technology that does not melt or gasify the powder material, but maintains the original solid phase state with a supersonic flow to make it impact on the substrate to form a film. The powder material under supersonic impact exceeds the critical speed. The particle body...

Claims

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Application Information

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IPC IPC(8): C22C38/44C22C38/58C22C38/04C22C38/02B22F9/08B22F1/00C23C24/04
CPCC22C38/44C22C38/58C22C38/04C22C38/02C22C38/002C22C38/001B22F9/082C23C24/04B22F1/14
Inventor 丁尔丁梓兴
Owner 深圳市金中瑞通讯技术有限公司
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