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Method for improving cavitation erosion resistance of TC4 titanium alloy based on ion implantation surface modification

A technology of ion implantation and surface modification, which is used in ion implantation plating, vacuum evaporation plating, metal material coating process, etc.

Inactive Publication Date: 2013-02-06
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method for improving cavitation erosion resistance of TC4 titanium alloy based on ion implantation surface modification
  • Method for improving cavitation erosion resistance of TC4 titanium alloy based on ion implantation surface modification

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Embodiment 1

[0014] Embodiment 1: A method for improving the cavitation corrosion resistance of TC4 titanium alloy, using ion implantation method to implant Nb element on the surface of TC4 titanium alloy.

[0015] The ion implantation of Nb element is carried out on the MEVVA source ion implanter, using high-purity niobium rod as the ion implantation source, and the implanted matrix is ​​TC4 titanium alloy.

[0016] The process parameters used in the ion implantation process are:

[0017] The accelerating voltage during injection is: 70kv

[0018] Beam density: 4.8uA / cm 2

[0019] The air pressure in the target chamber is about: 1×10 -3 Pa

[0020] The dose of implanted Nb ions is: 5×10 16 ions / cm 2

[0021] The test of the cavitation performance is carried out according to the American ASTM standard. The experimental equipment is the ultrasonic vibration cavitation test machine produced by Ningbo Xinzhi Biotechnology Co., Ltd., and the sample to be tested is fixed on the variable ...

Embodiment 2

[0035] Embodiment 2: A method for improving the cavitation corrosion resistance of TC4 titanium alloy, using ion implantation method to implant Nb element on the surface of TC4 titanium alloy.

[0036] The ion implantation of Nb element is carried out on the MEVVA source ion implanter, using high-purity niobium rod as the ion implantation source, and the implanted matrix is ​​TC4 titanium alloy.

[0037] The process parameters used in the ion implantation process are:

[0038] The accelerating voltage during injection is: 70kv

[0039] Beam density: 4.8uA / cm 2

[0040] The air pressure in the target chamber is about: 1×10- 3P a

[0041] The dose of implanted Nb ions is: 1×10 17 ions / cm 2

[0042] The test of the cavitation performance is carried out according to the American ASTM standard. The experimental equipment is the ultrasonic vibration cavitation test machine produced by Ningbo Xinzhi Biotechnology Co., Ltd., and the sample to be tested is fixed on the horn of t...

Embodiment 3

[0056] Embodiment 3: A method for improving the cavitation corrosion resistance of TC4 titanium alloy, using ion implantation method to implant Nb element on the surface of TC4 titanium alloy.

[0057] The ion implantation of Nb element is carried out on the MEVVA source ion implanter, using high-purity niobium rod as the ion implantation source, and the implanted matrix is ​​TC4 titanium alloy.

[0058] The process parameters used in the ion implantation process are:

[0059] The accelerating voltage during injection is: 70kv

[0060] Beam density: 4.8uA / cm 2

[0061] The air pressure in the target chamber is about: 1×10 -3 Pa

[0062] The dose of implanted Nb ions is: 4×10 17 ions / cm 2

[0063] The test of the cavitation performance is carried out according to the American ASTM standard. The experimental equipment is the ultrasonic vibration cavitation test machine produced by Ningbo Xinzhi Biotechnology Co., Ltd., and the sample to be tested is fixed on the horn of t...

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Abstract

The invention discloses a method for improving cavitation erosion resistance of TC4 titanium alloy based on ion implantation surface modification, and aims at improving the cavitation erosion resistance of TC4 titanium alloy, and expanding the applications of TC4 titanium alloy in the fields of hydraulic machinery, and naval architecture and ocean engineering. The method comprises the following steps of: placing the polished TC4 titanium alloy test sample in an MEVVA (metal vapour vacuum arc) source ion implanter, and using a high-purity niobium bar as an ion implantation source for performing Nb element ion implantation; and then performing a cavitation erosion experiment on the TC4 titanium alloy implanted with the Nb element, measuring the accumulated weight loss of the TC4 titanium alloy and observing the surface appearance after cavitation erosion. The results show that after the Nb element is implanted on the surface of the TC4 titanium alloy, the accumulated weight loss is reduced relatively to the accumulated weight losses of original test samples, and the cavitation erosion resistance is obviously improved.

Description

technical field [0001] The invention relates to the technical field of ion implantation modified surface engineering, and more specifically, relates to a technology for ion implantation of titanium alloy to improve its anti-cavitation performance. Background technique [0002] Cavitation wear is the damage caused by the formation and collapse of cavitation bubbles caused by the change of local pressure of liquid medium under certain temperature and environmental conditions. Cavitation was discovered in the propeller blades in the late 19th century when steam turbines were used to drive propellers. For a long time, cavitation has seriously affected the performance and service life of ship propellers, engine cylinder liners, valves, water pumps, hydraulic turbine flow parts, drilling machinery, etc. At present, in addition to ships, hydraulic engineering, machinery and chemical industry, the fields involving cavitation wear have also expanded to power generation, atomic energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/48C23C14/16
Inventor 史烨婷崔振铎杨贤金朱胜利李朝阳
Owner TIANJIN UNIV
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