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Titanium alloy ultrasonic knife surface strengthening method

A surface strengthening, titanium alloy technology, applied in the direction of metal material coating process, coating, solid diffusion coating, etc., can solve the problems of short service life, low cost, poor wear resistance, etc., and achieve good high temperature stability, Strong antioxidant effect

Active Publication Date: 2016-05-25
东莞市博耐特精密模具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of poor wear resistance, insufficient oxidation resistance and short service life of the titanium alloy ultrasonic knife used for rubber cutting, and to form a surface resistant TiN and Ti for wear and high temperature oxidation resistance 2 N compound protective layer enhances the wear resistance and high temperature oxidation resistance of the ultrasonic knife, thereby improving its service life, and the process is simple and the cost is low

Method used

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  • Titanium alloy ultrasonic knife surface strengthening method

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Effect test

Embodiment 1

[0022] A method for strengthening the surface of a TC4 titanium alloy ultrasonic knife for rubber cutting, using LD2-50 ion nitriding furnace equipment to nitride the surface of the ultrasonic knife, and providing the nitrogen source required for the generation of TiN by introducing a nitrogen-containing gas medium; Under the action of DC high voltage between them, they are ionized to produce a glow discharge. During the discharge process, nitrogen ions and hydrogen ions rush to the surface of the cathode titanium alloy ultrasonic knife under the action of a high-voltage electric field, and nitrogen ions or atoms are absorbed by the surface of the titanium alloy ultrasonic knife. Adsorbed and rapidly diffused to form a certain thickness of the nitride layer, and the ionized hydrogen ions reach the surface of the titanium alloy ultrasonic knife to help remove the oxide film on the surface of the titanium alloy ultrasonic knife, improving the quality of ion nitriding. The main pr...

Embodiment 2

[0029] A method for strengthening the surface of a titanium alloy ultrasonic knife, comprising the following steps:

[0030] (1) The surface of the titanium alloy ultrasonic knife is machined, ground and polished, and the surface roughness of the titanium alloy ultrasonic knife after grinding and polishing is Ra=0.75 μm;

[0031] (2) The titanium alloy ultrasonic knife that meets the surface roughness requirements is ultrasonically cleaned with acetone, absolute ethanol, and distilled water in sequence. The ultrasonic frequency is 80 Hz. The ultrasonic cleaning time in each washing solution is 10 minutes. Dry at room temperature in a nitrogen-free environment. ;

[0032] (3) Put the titanium alloy ultrasonic knife into the ion nitriding furnace for nitriding treatment. The nitriding treatment process parameters include: the electrode spacing is 30mm, the cathode bias voltage is 300V, and the ion nitriding furnace is washed with argon to remove oxygen. After vacuuming to vacuu...

Embodiment 3

[0036] A method for strengthening the surface of a titanium alloy ultrasonic knife, comprising the following steps:

[0037] (1) The surface of the titanium alloy ultrasonic knife is machined, ground and polished, and the surface roughness of the titanium alloy ultrasonic knife after grinding and polishing is Ra=0.5 μm;

[0038](2) The titanium alloy ultrasonic knife that meets the surface roughness requirements is ultrasonically cleaned with acetone, absolute ethanol, and distilled water in sequence. The ultrasonic frequency is 80 Hz. The ultrasonic cleaning time in each washing solution is 15 minutes. Dry at room temperature in a nitrogen-free environment. ;

[0039] (3) Put the titanium alloy ultrasonic knife into the ion nitriding furnace for nitriding treatment. The nitriding treatment process parameters include: the electrode spacing is 40mm, the cathode bias voltage is 290V, and the ion nitriding furnace is washed with argon to remove oxygen. After vacuuming to vacuum ...

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Abstract

The invention relates to a titanium alloy ultrasonic knife surface strengthening method which comprises the following steps: (1) machining the titanium alloy ultrasonic knife surface, grinding and polishing; (2) cleaning the titanium alloy ultrasonic knife which satisfies the surface roughness requirement, and drying; (3) putting the titanium alloy ultrasonic knife into an ion nitriding furnace, and carrying out nitriding treatment, wherein the nitriding treatment technological parameters are as follows: the pole pitch is 30-50mm, the cathode bias is less than or equal to 300V, the inside of the ion nitriding furnace is subjected to argon gas scrubbing for oxygen removal and vacuumized to the vacuum pressure of less than 5Pa, the gas medium filled in the ion nitriding furnace is NH3, the gas flow rate is 300-400 L / h, the nitriding pressure is 80-120Pa, the nitriding temperature is 800-1000 DEG C, and the nitriding time is 3-7 hours; and after the nitriding treatment is finished, carrying out furnace cooling on the titanium alloy matrix in an argon environment to room temperature, and discharging. Compared with the prior art, after the treatment of the technique, the hardness is enhanced by 2-3 times as compared with the titanium alloy matrix which is not subjected to ion nitriding treatment, and the abrasion resistance is enhanced by 8-25 times. The titanium alloy ultrasonic knife surface treated by the method has the characteristics of high abrasion resistance, high oxidation resistance and favorable high-temperature stability.

Description

technical field [0001] The invention relates to the field of metal surface engineering, in particular to a method for strengthening the surface of a titanium alloy ultrasonic knife. Background technique [0002] Titanium alloy is one of the materials with the highest specific strength among the currently used materials. It has a series of excellent properties, such as excellent corrosion resistance, low temperature stability, and good biocompatibility, making it widely used in aerospace, marine, etc. It plays a huge role in the fields of industry, chemical industry, biomedicine and civil industry. Moreover, titanium deposits are rich, accounting for 0.6% of the earth's crust, second only to aluminum, iron, and magnesium, and occupying the fourth place in the abundance of metal elements in the earth's crust. my country has now become a major titanium industry country. However, due to the poor wear resistance of titanium alloys, insufficient high-temperature performance, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/36C23C8/02
CPCC23C8/02C23C8/36
Inventor 王飞张超周隐玉史忠兵郑博
Owner 东莞市博耐特精密模具有限公司
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