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Treatment method of wc-17co on the surface of titanium alloy

A processing method and technology for titanium alloys, which are applied in the direction of metal material coating process, melt spraying, coating, etc., can solve the problems of poor fatigue resistance and achieve the effect of improving fatigue life.

Active Publication Date: 2017-01-18
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiency of poor fatigue resistance on the surface of existing titanium alloys, the present invention provides a WC-17Co treatment method on the surface of titanium alloys

Method used

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  • Treatment method of wc-17co on the surface of titanium alloy
  • Treatment method of wc-17co on the surface of titanium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] ①Titanium alloy fatigue samples according to figure 1 Carry out finishing machining and longitudinal polishing; ②use alcohol, acetone, ultrasonic cleaning to remove water and oil, and dry it for later use; ③according to the spraying process, carry out supersonic flame spraying WC-17Co coating on titanium alloy fatigue samples, coating The thickness is controlled at 50-55 μm; ④ The fatigue sample with WC-17Co coating is longitudinally ground and polished; ⑤ Finally, the polished and coated fatigue sample is subjected to H+DP+SP1 shot peening post-treatment. ⑥ Test the fatigue life of the shot peened sample after coating, the fatigue life of shot peening after coating polishing is 1.03 times higher than that of the coated sample, and the fatigue life is 1.48 times higher than that of the base material.

[0023] The specific process parameters of coating shot peening post-treatment H+DP+SP1 are as follows: ① shot peening intensity: 0.25mmA; ② shot peening coverage: 100%; ③...

Embodiment 2

[0025] ①Titanium alloy fatigue samples according to figure 1 Carry out finishing machining and longitudinal polishing; ②use alcohol, acetone, ultrasonic cleaning to remove water and oil, and dry it for later use; ③according to the spraying process, carry out supersonic flame spraying WC-17Co coating on titanium alloy fatigue samples, coating The thickness is controlled at 50-55 μm; ④ The fatigue sample with WC-17Co coating is longitudinally ground and polished; ⑤ Finally, the polished and coated fatigue sample is post-treated by H+DP+SP2 shot peening. ⑥ Test the fatigue life of the shot-peened sample after coating. The fatigue life of the shot-peened sample after coating polishing is 1.27 times higher than that of the coated sample, and the fatigue life is 1.72 times higher than that of the base material.

[0026] The specific process parameters of coating shot peening post-treatment H+DP+SP2 are as follows: ① shot peening intensity: 0.35mmA; ② shot peening coverage: 100%; ③ s...

Embodiment 3

[0028] ①Titanium alloy fatigue samples according to figure 1 Carry out finishing machining and longitudinal polishing; ②use alcohol, acetone, ultrasonic cleaning to remove water and oil, and dry it for later use; ③according to the spraying process, carry out supersonic flame spraying WC-17Co coating on titanium alloy fatigue samples, coating The thickness is controlled at 50-55 μm; ④ The fatigue sample with WC-17Co coating is longitudinally ground and polished; ⑤ Finally, the polished and coated fatigue sample is subjected to post-treatment of H+DP+SP3 shot peening. ⑥ Test the fatigue life of the shot-peened sample after coating. The fatigue life of the shot-peened sample after coating polishing is 40% higher than that of the coated sample, and the fatigue life is 15% lower than that of the base material.

[0029] The specific process parameters of coating shot peening post-treatment H+DP+SP3 are as follows: ① shot peening intensity: 0.45mmA; ② shot peening coverage: 100%; ③ s...

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Abstract

The invention discloses a titanium alloy surface WC-17Co treatment method and aims at solving the technical problem of poor anti-fatigue performance of the existing titanium alloy surface. The titanium alloy surface WC-17Co treatment method comprises the following steps: performing finish turning and longitudinal polishing treatment on a titanium alloy fatigue test piece; performing ultrasonic cleaning water-oil removal on the treated titanium alloy fatigue test piece, and drying by blowing for later use; forming a WC-17Co coating on the titanium alloy fatigue test piece by virtue of hypersonic flame spraying, and performing longitudinal polishing on the titanium alloy fatigue test piece with the WC-17Co coating; performing shot blasting aftertreatment on the titanium alloy fatigue test piece of which the coating is polished. As being tested, the fatigue life of the titanium alloy surface coating test piece is effectively prolonged by shot blasting aftertreatment process. The fatigue life of the titanium alloy surface coating which is polished and then shot-blasted is 1.03-1.27 times longer than the fatigue life of the non-shot-blasted titanium alloy surface coating, and the fatigue life of the titanium alloy surface coating which is polished and then shot-blasted is 1.48-1.72 times longer than the fatigue life of a substrate.

Description

technical field [0001] The invention relates to a titanium alloy surface treatment method, in particular to a titanium alloy surface WC-17Co treatment method. Background technique [0002] Titanium alloy has the characteristics of high specific strength, good thermal stability and excellent corrosion resistance, so it is widely used in aviation, aerospace, biomedicine and other industrial fields. The application of titanium alloy on aircraft can achieve good weight reduction benefits, and can meet the design requirements of high maneuverability, high reliability and long life of military aircraft, so it has become the main material for manufacturing key structural parts of aircraft. However, the biggest disadvantage of titanium alloy is its poor wear resistance, which limits its application in friction and wear conditions. The supersonic flame spraying (HVOF) WC-17Co coating technology can well improve the wear resistance of metal materials, eradicate the inherent network c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/129C23C4/06C22F1/18C23C4/18
CPCC23C4/06C23C4/18
Inventor 杜东兴刘道新张晓化项定根潘峰
Owner NORTHWESTERN POLYTECHNICAL UNIV