CN-116497350-B - Oxygen-consumption type laser cladding wear-resistant self-lubricating titanium alloy and preparation method thereof

CN116497350BCN 116497350 BCN116497350 BCN 116497350BCN-116497350-B

Abstract

The invention discloses an oxygen-consuming type laser cladding wear-resistant self-lubricating titanium alloy and a preparation method thereof, wherein the oxygen-consuming type laser cladding wear-resistant self-lubricating titanium alloy comprises the following steps of mixing raw materials, namely h-BN@TiO 2 、TiO 2 and CuO, to obtain mixed powder, paving the mixed powder on the surface of the titanium alloy, wherein the thickness of the paved powder is 1-1.5 mm, and carrying out laser cladding on the titanium alloy paved with the mixed powder in air by adopting laser cladding equipment, wherein the raw materials comprise, by mass, 1-10wt% of TiO 2 :92～98wt％,h-BN@TiO 2 and 1-2wt% of CuO. The laser cladding can be directly carried out in the air, and the problems that the oxygen element is introduced into the laser coating to form defects such as air holes, cracks and the like are solved. The CuO and TiO 2 are also used for coating the h-BN powder and introducing the powder into the coating, so that the cladding powder forms the coating under lower laser power, the self-lubricating phase h-BN is prevented from being decomposed in a large quantity, a lubricating film is formed in the friction experiment process, the friction coefficient is reduced, and the wear resistance of the titanium alloy is further improved.

Inventors

WANG WEI
SUN ZHUANG
WANG CHENG
LV FANFAN
GAO YUAN
WANG KUAISHE

Assignees

西安建筑科技大学

Dates

Publication Date: 20260512
Application Date: 20230410

Claims (10)

1. The preparation method of the oxygen-consuming type laser cladding wear-resistant self-lubricating titanium alloy is characterized by comprising the steps of mixing raw materials h-BN@TiO 2 、TiO 2 and CuO to obtain mixed powder, paving the mixed powder on the surface of the titanium alloy, and carrying out laser cladding on the titanium alloy paved with the mixed powder in air by adopting laser cladding equipment; The raw materials comprise, by mass, 1-6wt% of TiO 2 :92~98wt%,h-BN@TiO 2 and 1-2wt% of CuO.
2. The method for preparing the oxygen-consuming laser cladding wear-resistant self-lubricating titanium alloy according to claim 1, wherein the paving thickness of the mixed powder is 1-1.5 mm.
3. The preparation method of the oxygen-consuming laser cladding wear-resistant self-lubricating titanium alloy according to claim 2, wherein the mass percentage of the raw materials is 5: 5 wt% of TiO 2 :94wt%,h-BN@TiO 2 and 1: 1 wt% of CuO.
4. The method for preparing the oxygen-consuming laser cladding wear-resistant self-lubricating titanium alloy according to claim 1, wherein the preparation method of the h-BN@TiO 2 comprises the steps of adding h-BN, tetrabutyl titanate and polyvinylpyrrolidone into an ethanol solution for ultrasonic mixing, adding ammonia water into the mixed solution after ultrasonic treatment and carrying out hydrothermal reaction, centrifuging, cleaning and drying the obtained solution to obtain a powdery object, and finally placing the obtained powder into a tubular furnace, and preserving the temperature in an argon atmosphere to obtain the h-BN@TiO 2 .
5. The preparation method of the oxygen-consuming laser cladding wear-resistant self-lubricating titanium alloy is characterized by comprising the following raw materials, by weight, 80-83% of ethanol solution, 2-4 wt% of h-BN, 4-6 wt% of tetrabutyl titanate, 2-5 wt% of polyvinylpyrrolidone and 2-12 wt% of ammonia water.
6. The method for preparing the oxygen-consuming laser cladding wear-resistant self-lubricating titanium alloy according to claim 1, wherein the mixing comprises the steps of placing TiO 2 、h-BN@TiO 2 and CuO in a ball mill for ball milling at a rotational speed of 200-250 r/min, a ball-to-material ratio of 4:1, a ball milling time of 30-60 min, and drying at a temperature of 70 ℃ for 2-3 h.
7. The preparation method of the oxygen-consuming laser cladding wear-resistant self-lubricating titanium alloy is characterized in that the laser cladding equipment is a semiconductor optical fiber coupled laser, the wavelength is 1080nm, the laser light spots are rectangular light spots with the wavelength of 15mm multiplied by 2mm, the laser cladding power is 1500-2000W, and the scanning speed is 1-2 mm/s.
8. The method for preparing the oxygen-consuming laser cladding wear-resistant self-lubricating titanium alloy according to claim 7, which is characterized by comprising the following steps: Step 1, preparing h-BN@TiO 2 Adding h-BN, tetrabutyl titanate and polyvinylpyrrolidone into an ethanol solution for ultrasonic mixing, adding ammonia water into the mixed solution after ultrasonic treatment and performing hydrothermal reaction, centrifuging, cleaning and drying the obtained solution to obtain a powdery object, and finally placing the obtained powder into a tubular furnace, and preserving the temperature in an argon atmosphere to obtain h-BN@Ti 2 ; step 2, mixing and drying Placing TiO 2 、h-BN@TiO 2 and CuO into a ball mill for ball milling at the rotating speed of 200r/min, the ball-material ratio of 4:1, the ball milling time of 60min, and drying for 2h at the temperature of 70 ℃; Step 3, laying powder Spreading and pressing the mixed powder dried in the step2 on the surface of the titanium alloy to obtain a prefabricated coating, wherein the thickness of the prefabricated coating is 1 mm; step 4, performing laser cladding Carrying out single-pass laser cladding on the titanium alloy containing the prefabricated coating in the step 3 in air by adopting laser cladding equipment; The laser cladding equipment is a semiconductor optical fiber coupled laser, the wavelength is 1080nm, the laser spot is a rectangular spot with 15mm multiplied by 2mm, the laser process parameter is laser cladding power 1500W, and the scanning speed is 1.5mm/s.
9. The preparation method of the oxygen-consuming laser cladding wear-resistant self-lubricating titanium alloy is characterized in that the raw materials for preparing h-BN@TiO 2 in the step 1 comprise, by weight, 80-83% of ethanol solution, 2-4 wt% of h-BN, 4-6 wt% of tetrabutyl titanate, 2-5 wt% of polyvinylpyrrolidone and 2-12 wt% of ammonia water; The mass percentage of the raw materials in the step 2 is that TiO 2 :94wt%,h-BN@TiO 2 : 5 wt percent and CuO 1: 1 wt percent.
10. The laser cladding wear-resistant self-lubricating titanium alloy is characterized by being prepared by adopting the preparation method of any one of the laser cladding wear-resistant self-lubricating titanium alloy described in claims 1-9, wherein the microhardness of the titanium alloy is 1500-1700 HV 0.2 .

Description

Oxygen-consumption type laser cladding wear-resistant self-lubricating titanium alloy and preparation method thereof Technical Field The invention belongs to the technical field of laser cladding, and particularly relates to an oxygen-consumption type laser cladding wear-resistant self-lubricating titanium alloy and a preparation method thereof. Background Titanium alloy is widely applied to the fields of aerospace, marine ships, biomedicine and the like because of the advantages of high specific strength, good corrosion resistance, good biocompatibility and the like. However, titanium alloys have problems of low hardness and poor wear resistance, and the problem of poor wear resistance limits the scope of titanium alloys, and particularly in the field of military equipment pursuing light weight, if titanium alloys are used on a large scale, the combat ability of the military equipment will be remarkably improved. The laser cladding technology is a coating preparation technology for cladding a cladding material on the surface of a substrate by utilizing laser high temperature to form a cladding layer which is metallurgically bonded with a substrate. Therefore, the laser cladding technology has been widely applied to repair and remanufacturing of various mechanical equipment wear and corrosion parts. However, as the content of the hard phase in the cladding powder is increased, the friction coefficient of the coating is increased, cracks and air hole defects are increased, and further improvement of the wear resistance of the laser cladding coating is limited. In addition, various oxygen-containing substances are difficult to be used as cladding powder because of the problems of poor wettability of oxygen elements and the tendency of occurrence of air holes during laser cladding. Disclosure of Invention In order to solve the problems, the invention provides an oxygen-consuming laser cladding wear-resistant self-lubricating titanium alloy and a preparation method thereof, which are used for improving the wear resistance of the titanium alloy and expanding the application range of the titanium alloy. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: The preparation method of the oxygen-consuming type laser cladding wear-resistant self-lubricating titanium alloy comprises the steps of mixing raw materials h-BN@TiO 2、TiO2 and CuO to obtain mixed powder, paving the mixed powder on the surface of the titanium alloy, and carrying out laser cladding on the titanium alloy paved with the mixed powder in air by adopting laser cladding equipment; the raw materials comprise, by mass, 1-10wt% of TiO 2:92～98wt％,h-BN@TiO2 and 1-2wt% of CuO. Further, the thickness of the powder is 1-1.5 mm. Further, the raw materials comprise, by mass, 5% of TiO 2:94wt％,h-BN@TiO2 and 1% of CuO. Further, the preparation method of the h-BN@TiO 2 comprises the steps of adding the h-BN, tetrabutyl titanate and polyvinylpyrrolidone into an ethanol solution for ultrasonic mixing, adding ammonia water into the mixed solution after ultrasonic treatment, performing hydrothermal reaction, centrifuging the obtained solution, cleaning, drying to obtain a powdery object, finally placing the obtained powder into a tube furnace, and preserving the temperature in an argon atmosphere to obtain the h-BN@TiO 2. Further, the raw materials for preparing the h-BN@TiO 2 comprise, by weight, 80-83% of an ethanol solution, 2-4% of h-BN, 4-6% of tetrabutyl titanate, 2-5% of polyvinylpyrrolidone and 2-12% of ammonia water. Further, the mixing comprises the steps of placing TiO 2、h-BN@TiO2 and CuO in a ball mill for ball milling at the rotating speed of 200-250 r/min, the ball-material ratio of 4:1, the ball milling time of 30-60 min, and drying at the temperature of 70 ℃ for 2-3 h. Further, the laser cladding equipment is a semiconductor optical fiber coupled laser, the wavelength is 1080nm, the laser light spots are rectangular light spots with the wavelength of 15mm multiplied by 2mm, the laser cladding power is 1500-2000W, and the scanning speed is 1-2 mm/s. Further, the method comprises the following steps: Step 1, preparing h-BN@TiO 2 Adding h-BN, tetrabutyl titanate and polyvinylpyrrolidone into an ethanol solution for ultrasonic mixing, adding ammonia water into the mixed solution after ultrasonic treatment and performing hydrothermal reaction, centrifuging, cleaning and drying the obtained solution to obtain a powdery object, and finally placing the obtained powder into a tubular furnace, and preserving the temperature in an argon atmosphere to obtain h-BN@Ti 2; step 2, mixing and drying Placing TiO 2、h-BN@TiO2 and CuO into a ball mill for ball milling at the rotating speed of 200r/min, the ball-material ratio of 4:1, the ball milling time of 60min, and drying for 2h at the temperature of 70 ℃; Step 3, laying powder Spreading and pressing the mixed powder dried in the step 2 on the surface of the titanium alloy