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Method for modifying titanium-based laser cladding coating through LaB6

A laser cladding and modification technology, applied in the coating, metal material coating process, etc., can solve the problems of uneven distribution, poor wetting and bonding, etc., achieve uniform second phase particles, and reduce residual stress of the coating The degree of concentration and the effect of reducing the grain size

Inactive Publication Date: 2019-10-18
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of adding rare earth elements has received attention and certain applications in recent years. In the field of laser cladding, most of the rare earth addition methods are directly adding rare earth oxides. There are uneven distribution and insufficient wetting and bonding with the substrate. and other defects

Method used

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  • Method for modifying titanium-based laser cladding coating through LaB6
  • Method for modifying titanium-based laser cladding coating through LaB6
  • Method for modifying titanium-based laser cladding coating through LaB6

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] LaB 6 pre-added in Ti+AlB 2 Laser cladding powder, LaB 6 3% by mass, AlB 2 The mass percentage of Ti is 20%, and the rest is Ti. The mixed powder was prepared by the ball milling process, the ball-to-material ratio was 4:1; the rotation speed was 400 rpm, and the ball milling time was 180 minutes. A TC4 titanium alloy plate substrate is selected, and the size of the substrate is 200mm×80mm×20mm. The surface of the substrate is polished with a grinder, and then cleaned with acetone. An 8kW high-power semiconductor laser cladding system (LaserlineLDF-8000) is selected, the scanning speed is 4mm / s, the laser power is 2kW, and the powder feeding rate is about 12g / min. The whole laser cladding process is carried out under the protection of argon. The friction pair selected in the friction and wear test is corundum ceramics, the test load is 50N, the speed is 200rpm, and the test time is 60min. The high-temperature oxidation weight gain was tested at 650°C, 700°C, 750°C...

Embodiment 2

[0037] LaB 6 pre-added in Ti+AlB 2 Laser cladding powder, LaB 6 1.5% by mass, AlB 2 The mass percentage of Ti is 20%, and the rest is Ti. The mixed powder was prepared by the ball milling process, the ball-to-material ratio was 4:1; the rotation speed was 400 rpm, and the ball milling time was 180 minutes. A TC4 titanium alloy plate substrate is selected, and the size of the substrate is 200mm×80mm×20mm. The surface of the substrate is polished with a grinder, and then cleaned with acetone. An 8kW high-power semiconductor laser cladding system (LaserlineLDF-8000) is selected, the scanning speed is 4mm / s, the laser power is 2kW, and the powder feeding rate is about 12g / min. The whole laser cladding process is carried out under the protection of argon. The friction pair selected in the friction and wear test is corundum ceramics, the test load is 50N, the speed is 200rpm, and the test time is 60min. The high-temperature oxidation weight gain was tested at 650°C, 700°C, 750...

Embodiment 3

[0039] LaB 6 pre-added in Ti+AlB 2 Laser cladding powder, LaB 6 4.5% by mass, AlB 2 The mass percentage of Ti is 20%, and the rest is Ti. The mixed powder was prepared by the ball milling process, the ball-to-material ratio was 4:1; the rotation speed was 400 rpm, and the ball milling time was 180 minutes. A TC4 titanium alloy plate substrate is selected, and the size of the substrate is 200mm×80mm×20mm. The surface of the substrate is polished with a grinder, and then cleaned with acetone. An 8kW high-power semiconductor laser cladding system (LaserlineLDF-8000) is selected, the scanning speed is 4mm / s, the laser power is 2kW, and the powder feeding rate is about 12g / min. The whole laser cladding process is carried out under the protection of argon. The friction pair selected in the friction and wear test is corundum ceramics, the test load is 50N, the speed is 200rpm, and the test time is 60min. The high-temperature oxidation weight gain was tested at 650°C, 700°C, 750...

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Abstract

The invention discloses a method for modifying a titanium-based laser cladding coating through LaB6. The method comprises the steps that firstly, the LaB6 is added into laser cladding powder in advance to prepare mixed powder; secondly, the surface of a titanium alloy base plate is ground and cleaned; thirdly, the surface of the titanium alloy base plate is coated with the mixed powder in the first step, laser cladding is carried out, and the modified titanium alloy base plate is obtained; and fourthly, the modified titanium alloy base plate in the third step is subjected to friction wear test. Through grain refining, solid O and grain more uniform distribution, the hardness, plasticity and toughness, wear resistance, high temperature oxidation resistance and other properties of the titanium-based laser cladding coating can be improved.

Description

technical field [0001] The invention relates to the technical field of laser cladding, in particular to a method using LaB 6 A method for modifying titanium-based laser cladding coatings. Background technique [0002] Due to its good strength-to-weight ratio and excellent corrosion resistance, titanium alloys have been widely used in various sectors of the industrial field. However, at present, titanium alloys have poor wear resistance and are easily oxidized at high temperatures, which limits the application of titanium alloy parts under wear or high temperature conditions. [0003] With the development of laser technology, laser cladding technology has been widely used in the modification of the surface of titanium alloy parts, which can effectively improve its surface wear resistance, corrosion resistance, oxidation resistance, etc. Among them, titanium-based composite coatings have been widely used, which contain other second-phase particles such as ceramics, which can...

Claims

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Application Information

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IPC IPC(8): C23C24/10C22C14/00C22C32/00
CPCC23C24/103C22C14/00C22C32/0005
Inventor 李铸国冯悦峤
Owner SHANGHAI JIAO TONG UNIV
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