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Low-temperature ion nitriding method for synchronously improving wear resistance and fatigue resistance of titanium alloy

A technology of ion nitriding and titanium alloy, which is applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems that it is difficult to simultaneously improve wear resistance and fatigue resistance, and achieve excellent hardness and toughness matching, Effects of resisting fretting wear and improving low-cycle fatigue and high-cycle fatigue performance

Pending Publication Date: 2022-07-08
XIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a low-temperature ion nitriding method for synchronously improving the wear resistance and fatigue resistance of titanium alloys, which solves the problem that the surface ion nitriding of titanium alloys is difficult to simultaneously improve the wear resistance and fatigue resistance in the prior art

Method used

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  • Low-temperature ion nitriding method for synchronously improving wear resistance and fatigue resistance of titanium alloy
  • Low-temperature ion nitriding method for synchronously improving wear resistance and fatigue resistance of titanium alloy
  • Low-temperature ion nitriding method for synchronously improving wear resistance and fatigue resistance of titanium alloy

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Comparison scheme
Effect test

Embodiment 1

[0064] Nitriding treatment of TC4 titanium alloy disc samples and fatigue samples, the specific steps are as follows:

[0065] Step 1. Pretreatment of the substrate surface. The TC4 titanium alloy disc (size Φ30×8mm) used for hardness, toughness and wear testing was mechanically polished; the TC4 titanium alloy fatigue sample was mechanically polished along the axial direction; the polished sample was ultrasonically cleaned with acetone and alcohol Clean and dry after use.

[0066] Step 2. Place the workpiece and the auxiliary plate. Hang the cleaned TC4 titanium alloy disc and fatigue sample on the workpiece pole; hang two pure nickel plates (size 200×180×5mm, which can completely cover the sample) on the auxiliary poles on both sides of the sample; Adjust the distance between the pure nickel plate and the workpiece surface to 25mm.

[0067] Step 3. Sputter cleaning the workpiece and the auxiliary plate. After the vacuum chamber is pumped to high vacuum, argon gas with a ...

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Abstract

The invention discloses a low-temperature ion nitriding method for synchronously improving wear resistance and fatigue resistance of a titanium alloy. The low-temperature ion nitriding method is specifically implemented according to the following steps: step 1, pretreating the surface of a base material; 2, a workpiece and an auxiliary polar plate are arranged; 3, the workpiece and the auxiliary polar plate are subjected to sputtering cleaning; 4, low-temperature ion nitriding treatment is conducted, and the titanium alloy workpiece subjected to low-temperature ion nitriding treatment is obtained; and 5, the compound layer on the surface of the workpiece in the step 4 is removed. The method is green, safe and low in cost, and the wear resistance and the fatigue resistance of the titanium alloy can be synchronously improved.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy surface modification and strengthening methods, and particularly relates to a low-temperature ion nitriding method for simultaneously improving the wear resistance and fatigue resistance of titanium alloys. Background technique [0002] Many titanium alloy parts are often subjected to frictional contact and alternating fatigue loads at the same time in service, such as fasteners, engine blades and artificial joints. However, titanium alloys have low hardness and poor wear resistance. Most surface treatment technologies (electroplating, thermal spraying, surface alloying, physical or chemical vapor deposition, etc.) often seriously damage their fatigue while improving the wear resistance of titanium alloys. performance. Therefore, it is a difficulty in surface treatment technology to simultaneously improve the anti-wear and anti-fatigue properties of titanium alloys. [0003] The conventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/24C23C8/02
CPCC23C8/24C23C8/02
Inventor 于首明张国君同博王涛卢静静
Owner XIAN UNIV OF TECH
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