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Process for glow ion hydrogen-free carbonizing titanium surface

A technology of glow ion and process method, which is applied in the field of surface modification of metal materials, can solve problems affecting the carburizing quality of titanium materials, and achieve the effect of improving wear resistance

Inactive Publication Date: 2003-10-29
太原理工大学表面工程研究所 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time of carburizing, hydrogen elements always infiltrate into the matrix, and hydrogen embrittlement occurs, which seriously affects the carburizing quality of titanium materials.

Method used

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  • Process for glow ion hydrogen-free carbonizing titanium surface
  • Process for glow ion hydrogen-free carbonizing titanium surface
  • Process for glow ion hydrogen-free carbonizing titanium surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Put the TA2 pure titanium sample and the graphite source into the vacuum chamber, use a vacuum unit to evacuate, and the vacuum reaches 5×10 -3 After Pa, fill high-purity argon gas with a mass flow meter to make the partial pressure of argon gas reach 100Pa. At the same time, add a bias voltage of titanium workpiece from 200V to 700V and a source voltage of 200V to 700V to make the gap between the titanium workpiece and the source The hollow cathode discharge is generated, and the temperature of the workpiece is controlled according to the bias voltage of the titanium workpiece and the source voltage. When the temperature of the workpiece is controlled at 950°C, the voltage of the source is raised to 1200V, and the bias voltage of the titanium workpiece is adjusted to 700V. After 4 hours of constant temperature, it was cooled with the furnace. After detection and analysis, the average thickness of the carburized layer in the sample was 220 μm, and the surface hardness re...

Embodiment 2

[0021] Put the TC4 titanium alloy sample and the graphite source into the vacuum chamber, evacuate, and the vacuum reaches 5×10 -3 After Pa, use a mass flowmeter to fill high-purity argon gas to make the partial pressure of argon gas reach 20Pa. At the same time, add a bias voltage of 200V~700V for the titanium workpiece and a source voltage of 200V~700V to make a gap between the titanium workpiece and the source. Hollow cathode discharge, the temperature of the workpiece is controlled according to the bias voltage of the titanium workpiece and the source voltage, and the auxiliary heater is used for auxiliary heating. When the temperature of the workpiece is controlled at 1150°C, the voltage of the source is raised to 1200V, and the titanium workpiece After the bias voltage was adjusted to 800V, the temperature was kept constant for 4 hours, and cooled with the furnace. After detection and analysis, the average thickness of the carburized layer in the sample is 496 μm, and th...

Embodiment 3

[0023] Ti 3 The Al high-temperature titanium alloy sample and the graphite source were put into the vacuum chamber, and the vacuum was evacuated to 5×10 -3 After Pa, fill high-purity argon gas with a mass flowmeter to make the partial pressure of argon gas reach 50Pa. At the same time, add a bias voltage of 200V~700V for the titanium workpiece and a source voltage of 200V~700V to make a gap between the titanium workpiece and the source. The hollow cathode is discharged, and the temperature of the workpiece is controlled according to the bias voltage of the titanium workpiece and the source voltage. When the temperature of the workpiece is controlled at 1300°C, the voltage of the source is raised to 1200V. After 3 hours, cool in the furnace. After detection and analysis, the average thickness of the carburized layer in the sample is 145μm, and the surface hardness reaches 2800HV.

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Abstract

A non-hydrogen glow ion process for carbonizing the surface of titanium (or Ti alloy) is characterized by that under the action of electric bias field and inert energy, the carbon ions (or atoms) sputted out from graphite electrode in glow plasmas reach to the surface of hot titanium workpiece, and under the action of thermal diffusion and ion bombardment the carbon ions (or atoms) come in the surface of titanium to form titanium carbide. Its advantages are high surface hardness (3000 HV) and antiwear nature, and deep carbonized layer.

Description

Technical field [0001] The invention relates to a titanium surface glow ion hydrogen-free carburizing process, which relates to a metal material surface modification technology, in particular to a titanium and titanium alloy surface modification technology. Background technique [0002] Due to the advantages of high specific strength and good corrosion resistance, titanium materials are increasingly used in various industries. Such as aviation, aerospace, marine, petrochemical and weapons and other fields began to be widely used. Titanium and titanium alloys have been widely used in aircrafts. In aircraft engines, titanium blades will wear, burn or burn when they are working. There have been severe lessons in the history of air crashes. When titanium is used as other functional materials, problems such as non-wear resistance and easy welding will also occur. As a countermeasure against these problems, it is to improve the surface wear resistance of titanium and titanium a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/36
Inventor 李争显高原张跃飞徐重周廉池成忠潘俊德唐宾陈飞苏永安李忠厚秦林贺志勇
Owner 太原理工大学表面工程研究所
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