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A kind of cold spraying device and method for preparing 316l stainless steel coating

A cold spraying, stainless steel technology, applied in pressure inorganic powder coating and other directions, can solve problems such as poor coating quality, and achieve the effect of saving process, promoting gas expansion and tight bonding

Inactive Publication Date: 2016-03-30
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a cold spraying device and method for preparing 316L stainless steel coatings, which solves the problem of poor coating quality when the existing thermal spraying technology prepares stainless steel coatings, and at the same time integrates common carbon steel and iron products with low cost With the high performance of stainless steel, the purpose of reducing costs while ensuring performance is achieved

Method used

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  • A kind of cold spraying device and method for preparing 316l stainless steel coating
  • A kind of cold spraying device and method for preparing 316l stainless steel coating
  • A kind of cold spraying device and method for preparing 316l stainless steel coating

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Experimental program
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Effect test

Embodiment 1

[0031] The 316L stainless steel coating is prepared by using the cold spraying equipment added with the powder feeding heater of the present invention, the spraying material is 316L stainless steel powder of -400~-500 mesh, and the spraying base material is 45# steel. The specific process parameters are: the carrier gas pressure is 2.0MPa, the carrier gas heating temperature is 500°C, the powder feeding heating temperature is 470°C, and the spraying distance is 20mm.

[0032] The SEM photo of the interface between the prepared cold sprayed stainless steel coating and the substrate is as follows: figure 2 (b) shown.

Embodiment 2

[0037] The difference from Example 1 is that the carrier gas heating temperature is 550°C, and the SEM photo of the interface between the prepared cold sprayed stainless steel coating and the substrate is as follows: figure 2 (d) shown.

Embodiment 3

[0041] The difference from Example 1 is that the carrier gas heating temperature is 600°C, and the SEM photo of the interface between the prepared cold sprayed stainless steel coating and the substrate is as follows: figure 2 (f) shown.

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Abstract

The invention discloses a cold spraying device and a method for preparing a 316L stainless steel coating, and belongs to the cold spraying technical field. The device mainly comprises a control system, a powder feeder, a gas heater, a laval nozzle and a powder heater. One end of the gas heater is connected with the laval nozzle, and the other end of the gas heater is connected with the powder feeder. One end of the powder feeder is connected with the control system, and the other end of the powder feeder is connected with one end of the powder heater. The other end of the powder heater is connected with the laval nozzle. In preparation of 316L stainless steel coating by utilization of the device, the technological parameters are as follows: the carrier gas preheating temperature is 200-600 DEG C, the spraying distance is 10-30 mm, the spraying pressure is 1.5-2.5 MPa, and the powder-feeding heating temperature is 200-500 DEG C. The modified cold spraying device heats the stainless steel powder from the powder feeder, and a compact stainless steel coating tightly combining with a matrix is obtained.

Description

technical field [0001] The invention relates to the technical field of cold spraying, in particular to a cold spraying device and method for preparing 316L stainless steel coatings. Background technique [0002] Compared with ordinary carbon steel and iron products, stainless steel has the advantages of high temperature resistance, oxidation resistance, corrosion resistance, strength and processability, and is widely used in petroleum, chemical, natural gas, automobiles, food, instruments, valves, corrosion-resistant pumps, marine, etc. industrial field. In addition, the appearance of stainless steel products is smooth and beautiful, not easy to pollute and rust, and is favored by people. The reason why stainless steel "does not rust" is due to the addition of elements such as chromium and nickel with strong corrosion resistance. However, the addition of precious metals increases the cost while improving performance, especially for stainless steel with special requirements...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/04
Inventor 沈艳芳杜昊熊天英崔新宇吴杰陶永山
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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