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Preparation method for gradient titanium alloy-surface Ni/TiN composite modification layer

A surface gradient and composite modification technology, applied in metal material coating process, coating, solid diffusion coating and other directions, can solve the problems of large difference in hardness of substrate, low hardness of nickel deposition layer, poor coordination deformation ability, etc. Achieve the effect of good comprehensive mechanical properties, low cost and strong binding force

Active Publication Date: 2015-08-26
太原市赛斯科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hardness of the nickel deposit is low, the binding force is weak, and it is not resistant to seawater corrosion
Although the hardness of the TiN film is high, the thickness is thin, and the hardness difference from the substrate is large, and the coordinated deformation ability is poor.

Method used

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  • Preparation method for gradient titanium alloy-surface Ni/TiN composite modification layer
  • Preparation method for gradient titanium alloy-surface Ni/TiN composite modification layer
  • Preparation method for gradient titanium alloy-surface Ni/TiN composite modification layer

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Sample preparation

[0025] (1) Processing Ti6Al4V samples. A cylindrical sample with a size of Φ14mm×3mm is processed by a molybdenum wire cutting machine.

[0026] (2) Clean the surface of Ti6Al4V sample. First, use 360# sandpaper to polish to remove the wire cutting marks on the surface and maintain a good surface flatness; 2 o 3 The polishing solution is polished to the mirror surface; finally, it is cleaned and dried by ultrasonic wave in deionized water, alcohol, and acetone solution successively.

[0027] Double layer glow plasma nickel plating

[0028] (1) Furnace loading: place the Ti6Al4V sample in the double-glow plasma metallization furnace, use a nickel plate with a purity of 99.99% as the sputtering target, the target is placed horizontally and the substrate is placed on the stage Above, the spacing is 18mm, and the sputtering gas is high-purity argon.

[0029] (2) Heating up: Turn on the mechanical pump, and when the vacuum of the body reaches 0.5Pa...

Embodiment 2

[0044] The difference from Example 1 is that TA2 is used as the base material, and other steps are the same.

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Abstract

The invention relates to the field of treatment of a surface layer, specifically to a preparation method for a titanium alloy-surface composite modification layer. The preparation method for the gradient titanium alloy-surface Ni / TiN composite modification layer comprises the following steps: carrying out nickelizing on the surface of titanium alloy by using double glow plasma diffusion metalizing technology so as to prepare a nickel alloy layer used as a transition layer; and then carrying out nitriding on the surface of a nickel alloyed sample so as to prepare a TiN film, wherein a prepared titanium alloy-surface modification layer is the Ni / TiN composite modification layer. The composite modification layer has the advantages of a thick diffusion metalizing layer, good compatibility of deformation, high hardness, resistance to sea water corrosion and good comprehensive mechanical properties and can be extensively applied to working conditions of high requirements on wear resistance, good toughness and resistance to sea water corrosion.

Description

technical field [0001] The invention relates to a method for preparing a composite modified layer on the surface of a titanium alloy. Specifically, it is a method for preparing a titanium-nickel compound layer and a TiN composite modified layer by nitriding the surface of a titanium alloy after nickel alloying. Surface modification of metal materials. Background technique [0002] Due to its high specific strength, excellent corrosion resistance, good high temperature performance and thermal stability, titanium alloys are widely used in aviation, aerospace, rockets, missiles, ships, automobiles, energy and chemical industry, sports equipment, medical treatment and other fields. However, due to low hardness and poor wear resistance, the safety and reliability of titanium alloys are affected. Therefore, how to improve the surface properties of titanium alloys, prepare high-hardness modified layers, and improve their wear resistance is one of the hot spots that scholars at hom...

Claims

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Application Information

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IPC IPC(8): C23C14/16C23C14/34C23C8/36
Inventor 王振霞杨红玉任列香吴海瑞单小林贺志勇刘小萍林乃明
Owner 太原市赛斯科技有限公司
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