Method for low-laser-power preparation of TiN gradient coating on titanium alloy surface

A technology of laser power and gradient coating, which is applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve problems such as complex process, and achieve the effect of simple process, low cost and dense coating

Active Publication Date: 2017-12-15
柳州市恒丰利刀具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These preparation methods require relatively strict conditions, require dense equipmen

Method used

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  • Method for low-laser-power preparation of TiN gradient coating on titanium alloy surface
  • Method for low-laser-power preparation of TiN gradient coating on titanium alloy surface
  • Method for low-laser-power preparation of TiN gradient coating on titanium alloy surface

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Embodiment 1

[0034] A method for preparing a TiN gradient coating with low laser power on the surface of a titanium alloy, comprising the following steps:

[0035] 1. Titanium alloy substrate pretreatment; select the sample as TC4 titanium alloy, wire-cut the TC4 titanium alloy substrate into a size of 30mm*22mm*6mm, and use 80#, 120#, 240#, 320#, 400#, 600 # of water abrasive paper for surface treatment, then dry with absolute ethanol ultrasonic cleaning for 15min;

[0036] 2. Air supply treatment: put the pretreated TC4 titanium alloy substrate into the air supply controller, and send high-purity nitrogen laterally through the air supply nozzle, the purity of which is greater than 99.999%; the air supply parameters are set: the distance between the nozzle opening and the light spot is 5~ 15mm, the nitrogen flow rate meter controls the nitrogen flow rate to 20L / min;

[0037] 3. Laser nitriding treatment: After the TC4 titanium alloy substrate is air-supplied for 5 to 10 seconds, turn on ...

Embodiment 2

[0039] A method for preparing a TiN gradient coating with low laser power on the surface of a titanium alloy, comprising the following steps:

[0040] 1. Titanium alloy substrate pretreatment; select the sample as TC4 titanium alloy, wire-cut the TC4 titanium alloy substrate into a size of 30mm*22mm*6mm, and use 80#, 120#, 240#, 320#, 400#, 600 # of water abrasive paper for surface treatment, then dry with absolute ethanol ultrasonic cleaning for 15min;

[0041] 2. Air supply treatment: put the pretreated TC4 titanium alloy substrate into the air supply controller, and send high-purity nitrogen laterally through the air supply nozzle, the purity of which is greater than 99.999%; the air supply parameters are set: the distance between the nozzle opening and the light spot is 5~ 15mm, the nitrogen flow rate meter controls the nitrogen flow rate to 20L / min;

[0042] 3. Laser nitriding treatment: After the TC4 titanium alloy substrate is air-supplied for 5 to 10 seconds, turn on ...

Embodiment 3

[0044] A method for preparing a TiN gradient coating with low laser power on the surface of a titanium alloy, comprising the following steps:

[0045] 1. Titanium alloy substrate pretreatment; select the sample as TC4 titanium alloy, wire-cut the TC4 titanium alloy substrate into a size of 30mm*22mm*6mm, and use 80#, 120#, 240#, 320#, 400#, 600 # of water abrasive paper for surface treatment, then dry with absolute ethanol ultrasonic cleaning for 15min;

[0046] 2. Air supply treatment: put the pretreated TC4 titanium alloy substrate into the air supply controller, and send high-purity nitrogen laterally through the air supply nozzle, the purity of which is greater than 99.999%; the air supply parameters are set: the distance between the nozzle opening and the light spot is 5~ 15mm, the nitrogen flow rate meter controls the nitrogen flow rate to 20L / min;

[0047]3. Laser nitriding treatment: After the TC4 titanium alloy substrate is air-supplied for 5 to 10 seconds, turn on t...

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Abstract

The invention discloses a method for low-laser-power preparation of a TiN gradient coating on a titanium alloy surface. The high-hardness and good-abrasion-performance TiN coating is obtained through the technological steps of titanium alloy base pretreatment, air supply treatment and laser nitrogen treatment. The TiN coating prepared through the method and a titanium alloy base layer are subject to metallurgical bonding, the coating is compact, and gaps and cracks are avoided; the hardness of the TiN coating is greatly improved compared with a titanium alloy base, and the hardness is gradually increased from an interface to the coating and is increased by 4 times to 5 times to the greatest extent; and compared with a traditional nitriding technological process, the preparing environment is under the normal temperature atmosphere scope, an air sealing device is not needed, powder or a pre-coating material is not needed, requirements for the base material, specification and size are avoided, local nitriding on the base material can be carried out, other materials are not needed except for nitrogen, cost is low, the technology is simple, efficiency is high, and industrialization is easy to achieve.

Description

technical field [0001] The invention relates to the technical field of titanium alloy surface modification, in particular to a method for preparing a TiN gradient coating on the surface of a titanium alloy with low laser power. Background technique [0002] Titanium alloy has the advantages of low density, corrosion resistance, excellent biocompatibility, etc. It is widely used in aerospace, shipbuilding, petroleum, medical equipment and other national defense and civil high-tech fields, but titanium alloy has low hardness and poor wear resistance. 1. The use temperature is low. When the temperature reaches 500°C, titanium metal can react strongly with oxygen, nitrogen and other elements in the atmosphere, and quickly become embrittled and fail. These shortcomings greatly limit the application range of titanium alloys. In order to make up for the shortcomings of titanium alloys, it is an effective method to prepare a protective coating on its surface. The TiN coating can not...

Claims

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Application Information

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IPC IPC(8): C23C8/24
Inventor 李伟洲童庆吴广毅蒋智秋陈泉志董婉冰
Owner 柳州市恒丰利刀具有限公司
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