Preparation method of Mo-containing TiCN-based composite coating

A technology of composite coating and composite powder, which is applied in the direction of coating, metal material coating process, fusion spraying, etc., to achieve the effects of improving hardness and wear resistance, reducing wear, and increasing hardness

Inactive Publication Date: 2017-02-22
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method adds Mo components to the titanium-carbon composite spraying powder, which further improves the hardness of the TiCN ceramic coating, overcomes the shortc

Method used

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  • Preparation method of Mo-containing TiCN-based composite coating
  • Preparation method of Mo-containing TiCN-based composite coating
  • Preparation method of Mo-containing TiCN-based composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In this example, a reactive plasma spraying process was used to prepare a micro-nano-scale multi-scale TiCN-Mo metal-based ceramic composite coating on the surface of the 45# steel substrate sample, and the main phase of the prepared coating was TiC 0.7 N 0.3 , Mo mainly exists in the form of Mo simple substance in the coating, partly as Mo 2 The form of C carbide exists.

[0036] The preparation method of this coating is as follows:

[0037] (1) Put the 45# steel substrate sample into the TPS-1 air pressure sandblasting machine, and perform sandblasting and roughening treatment on the surface. The abrasive particles are sucked into the nozzle, accelerated in the high-pressure airflow, and sprayed onto the surface of the substrate. , to obtain a clean and rough surface, thereby increasing the bonding force between the substrate and the coating;

[0038] (2) Using graphite as the carbon source, according to the mass ratio of Ti and C powders of 6:1, Ti and C composite...

Embodiment 2

[0047] In this example, a reactive plasma spraying process was used to prepare a micro-nano-scale multi-scale TiCN-Mo metal-based ceramic composite coating on the surface of the 45# steel substrate sample, and the main phase of the prepared coating was TiC 0.7 N 0.3 , Mo mainly exists in the form of Mo simple substance in the coating, partly as Mo 2 The form of C carbide exists.

[0048] The preparation method of the coating is as follows:

[0049] Graphite is used as the carbon source, and the mass ratio of Ti and C powder is 5:1. Before spraying the coating, Ni-10%wtAl self-fluxing alloy powder with a thickness of 110 μm is pre-sprayed on the surface of the steel substrate as the bottom layer (or bonding bottom layer), the quality of Mo powder is 30% of the quality of composite powder to obtain the original feeding composite powder of spraying, adjust operating current 500A, arc voltage 70V, carry out spraying, other steps are identical with example 1.

[0050] The SEM im...

Embodiment 3

[0056] In this example, a reactive plasma spraying process was used to prepare a micro-nano-scale multi-scale TiCN-Mo metal-based ceramic composite coating on the surface of a 304 stainless steel substrate sample, and the main phase of the prepared coating was TiC 0.7 N 0.3 , Mo mainly exists in the form of Mo simple substance in the coating, partly as Mo 2 The form of C carbide exists.

[0057] The preparation method of the coating is as follows:

[0058] Graphite is used as the carbon source, and the mass ratio of Ti and C powder is 5:1. Before spraying the coating, Ni-10%wtAl self-fluxing alloy powder with a thickness of 110 μm is pre-sprayed on the surface of the steel substrate as the bottom layer (or Adhesive bottom layer), the original feed composite powder that obtains spraying by the quality of Mo powder is 25% of the quality of composite powder, regulate working current 500A, arc voltage 70V, carry out spraying, other steps are identical with example 1.

[0059] T...

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Abstract

The invention discloses a preparation method of a Mo-containing TiCN-based composite coating. The method comprises the following steps that firstly, the surface of a substrate sample is roughened; secondly, Ti/C composite powder and Mo powder are mechanically blended to obtain original feed composite powder; thirdly, the surface of a substrate is pre-coated with Ni-10%wtAl self-refluxing alloy power, so that a base layer with the thickness being 90-120 [mu]m is obtained; and fourthly, the surface of the base layer is coated with the original feed composite powder, so that a TiCN-Mo metal-based ceramic composite coating with the thickness being 300-500 [mu]m is obtained. The plasma-spraying TiCN-Mo metal-based ceramic composite coating is high in hardness, good in abrasion resistance and corrosion resistance, suitable for workpieces, such as cutters, drill bits, moulds and the like in the fields of machinery, automobile making, aerospace and the like, under abrasive and corrosive environment conditions, and the plasma-spraying TiCN-Mo metal-based ceramic composite coating has extremely wide application prospects.

Description

technical field [0001] The invention relates to a preparation method of a sprayed coating, in particular to a plasma sprayed coating with high hardness and high wear resistance and a preparation method thereof. Background technique [0002] TiCN is a ternary superhard ceramic material, which is a solid solution of TiN and TiC. It has high hardness of ceramic material (HV=2472kg / mm 2 ) High chemical stability and wear resistance, good high temperature resistance, has been widely used in many fields such as mechanical chemical industry, automobile manufacturing and aerospace. [0003] At present, surface treatment methods such as plasma-assisted vapor deposition (PACVD), chemical vapor deposition (CVD) and ion implantation are commonly used to prepare TiCN. Although these methods have made outstanding progress in preparing TiCN coatings, due to the existence of these methods The deposition efficiency is low (2~10μm / h), the thickness of the film is too thin (10~50μm), the com...

Claims

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Application Information

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IPC IPC(8): C23C4/134C23C4/06C23C4/08C23C4/02
CPCC23C4/06C23C4/02C23C4/08
Inventor 何继宁张迪陈凯秦艳芳张建新章凡勇
Owner HEBEI UNIV OF TECH
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