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A method for preparing zirconium-rich modified layer by infiltrating zirconium on the surface of medium zirconium alloy

A zirconium alloy and modified layer technology, which is applied in the field of zirconium alloy preparation, achieves the effects of simple preparation process, reduced wear, and improved wear resistance

Active Publication Date: 2020-09-11
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned ZrTiAlV alloys with different performance combinations cannot achieve the effects of good plasticity, high strength, and friction and corrosion resistance.

Method used

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  • A method for preparing zirconium-rich modified layer by infiltrating zirconium on the surface of medium zirconium alloy
  • A method for preparing zirconium-rich modified layer by infiltrating zirconium on the surface of medium zirconium alloy
  • A method for preparing zirconium-rich modified layer by infiltrating zirconium on the surface of medium zirconium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Cut zirconium alloy (Zr51Ti39Al5V5) forged rods into alloy sheets with a thickness of 3.5-4mm and a diameter of 40mm using a wire electric discharge machine, and then use 150#, 400#, 600#, 1000#, 1500#, 2000# and 2500# sandpaper to polish the surface of the alloy sheet in turn, then use a polishing machine to mechanically polish the alloy sheet, then use acetone solution and absolute ethanol solution to ultrasonically clean it for 15 minutes, put the processed alloy sheet into the double In the Hui plasma surface metallurgy furnace, the source target is made of industrial pure zirconium sheet, and the distance between the source and the alloy surface is adjusted to 16mm; the furnace body is closed, the vacuum is evacuated to 4Pa, and then the protective gas is filled with argon to 300Pa, and the pumping and charging are repeated. The process is three times; adjust the working air pressure to 30Pa, turn on the power supply of the alloy electrode to raise the voltage to 30...

Embodiment 2

[0026] Cut zirconium alloy (Zr51Ti39Al5V5) forged rods into alloy sheets with a thickness of 3.5-4mm and a diameter of 40mm using a wire electric discharge machine, and then use 150#, 400#, 600#, 1000#, 1500#, 2000# Polish the surface of the alloy sheet with 2500# sandpaper in turn, then use a polishing machine to mechanically polish the alloy sheet, then use acetone solution and absolute ethanol solution to ultrasonically clean it for 15 minutes, and put the processed alloy sheet into In the Shuanghui plasma surface metallurgy furnace, the source target is made of industrially pure zirconium, and the distance between the source and the alloy surface is adjusted to 17mm; the furnace body is closed, the vacuum is evacuated to 3Pa, and then the protective gas is filled with argon to 300Pa, and the pumping is repeated- Charge the process three times; adjust the working air pressure to 35Pa, turn on the alloy electrode power supply to increase the voltage to 300V, bombard and clean...

Embodiment 3

[0028] Cut zirconium alloy (Zr51Ti39Al5V5) forged rods into alloy sheets with a thickness of 3.5-4mm and a diameter of 40mm using a wire electric discharge machine, and then use 150#, 400#, 600#, 1000#, 1500#, 2000# Polish the surface of the alloy sheet with 2500# sandpaper in turn, then use a polishing machine to mechanically polish the alloy sheet, then use acetone solution and absolute ethanol solution to ultrasonically clean it for 15 minutes, and put the processed alloy sheet into In the Shuanghui plasma surface metallurgy furnace, the source target is made of industrially pure zirconium, and the distance between the source and the alloy surface is adjusted to 18mm; the furnace is closed, vacuumed to 2Pa, and then filled with protective gas argon to 300Pa, repeated pumping- Charge the process three times; adjust the working air pressure to 40Pa, turn on the power supply of the alloy pole to increase the voltage to 300V, and bombard and clean the surface of the alloy for 10...

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Abstract

The invention discloses a method for preparing a zirconium-rich modified layer on a surface of middle-zirconium alloy through zirconium permeating. The method mainly comprises the following steps that1, surface pretreatment of a zirconium alloy Zr51 Ti39A15v5; and 2, diffusion coating treatment of double-glow plasma is conducted, a permeability zirconium source electrode target material is industrial pure zirconium, distance between a source electrode and the alloy surface is 16-18mm; a furnace body is vacuumized to 4 Pa or below and then is filled with argon to 300 Pa, vacuumizing is repeated three times; working air pressure is adjusted to be 30-40Pa, power supply of the alloy electrode is turned on to increase the voltage to 300V, bombardment cleaning on the surface of the alloy is conducted for 10 minutes, and then the alloy voltage is increased to the working voltage 450-550V; the source electrode power supply is turned on to increase the voltage to 640-650V, the bombardment cleaning is conducted on the source electrode target material for 10 minutes, finally the source electrode voltage is increased to the working voltage 800-900V, the temperature is stabilized at 750-850 DEG C; and the diffusion coating under the constant-temperature is conducted for 3-5h. According to the method, hardness of the surface layer of the zirconium alloy prepared is obviously improved, a friction coefficient is reduced, abrasion loss is obviously reduced compared with the prior art, and corrosion resistance of the surface of the zirconium alloy is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a preparation method of zirconium alloy. Background technique [0002] Titanium alloy has high specific strength, good corrosion resistance and good low temperature performance. In addition to special radiation resistance, smaller thermal neutron absorption cross section, and better compatibility with uranium, zirconium alloys also have better corrosion resistance than titanium alloys. They also have the disadvantages of low hardness and low friction resistance. In order to overcome their shortcoming, Chinese physical and metallurgical workers have studied and prepared a series of ZrTiAlV alloys with different performance combinations. Among them, the low and medium zirconium ZrTiAlV alloys have good plasticity, and the high zirconium ZrTiAlV alloys have higher strength and more excellent corrosion resistance. However, the above-mentioned ZrTiAlV alloys with different combin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C16/00C23C10/08
CPCC22C16/00C23C10/08
Inventor 景勤吕敬旺王建青刘日平
Owner YANSHAN UNIV