Method for acquiring highly-adaptive abrasion-proof titanium-based composite material on titanium alloy surface

A titanium-based composite material and titanium alloy technology, applied in metal material coating process, metal processing equipment, coating and other directions, can solve the problems of low coating toughness, limited thickness of cladding layer, poor coating toughness, etc. Good matching of thermophysical properties, reduction of coating stress and cracking tendency, good resistance to shock vibration load and thermal fatigue performance

Inactive Publication Date: 2008-03-12
有研科技集团有限公司
View PDF0 Cites 48 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pre-powder method is generally only suitable for cladding a layer of material on the surface of the material, and the thickness of the cladding layer is limited. If the powder is too thick, it is difficult to ensure the metallurgical bonding between the coating and the substrate and good coating performance during cladding; The coating formed by laser cladding SiC, TiC and WC directly on the surface of titanium alloy is brittle and prone to cracks; laser cladding NiCrBSi, NiCrBSi+TiC, Ti-Co, Cr-Ni-Si, T

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for acquiring highly-adaptive abrasion-proof titanium-based composite material on titanium alloy surface
  • Method for acquiring highly-adaptive abrasion-proof titanium-based composite material on titanium alloy surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: The present invention is used to prepare an in-situ self-generated TiB-reinforced titanium-based composite coating on the surface of TC4.

[0025] Using Ti and TiB in the laser molten pool 2 in situ reaction (Ti+TiB 2 =2TiB) The in-situ self-generated TiB-reinforced titanium matrix composite coating was prepared on the surface of TC4. Figure 1 is the pre-mixed Ti+6vol.%TiB deposited by laser cladding 2 、Ti+15vol.%TiB 2Coating (Ti powder is gas-atomized spherical powder, powder particle size 75-150μm, TiB 2 Particle size 38-75μm, irregular granular) scanning electron micrograph structure (S-2400 scanning electron microscope, Hitachi, Japan, the left picture is Ti+6vol.%TiB 2 Coating, the picture on the right is Ti+15vol.%TiB 2 coating). The laser power used is 1.5kW, the scanning speed is 5mm / s, and the feeding rate is 4.0g / min. It can be seen that the added TiB 2 All of them were decomposed and reacted with titanium to form short fibrous TiB in situ. D...

Embodiment 2

[0026] Embodiment 2: Laser cladding TC4+Cr on the surface of TC4 alloy with the present invention 3 C 2 Preparation of titanium matrix composite coatings.

[0027] The room temperature hardness of the annealed TC4 titanium alloy is HRC 25-35, and the solid solution aging state is HRC 29-38. Pre-mixed TC4+3.4vol.%Cr by laser cladding on the surface of TC4 3 C 2 、TC4+6.9vol.%Cr 3 C 2 And TC4+10.5vol.%Cr 3 C 2 (TC4 is an aerosolized spherical powder with a particle size of 45-150μm; Cr 3 C 2 It is polygonal particles, the powder particle size is 38-75μm, and the substrate size is 100×60×6mm 3 ), to obtain a highly suitable wear-resistant titanium matrix composite coating. The laser power used is 3.0kW, the scanning speed is 3.0-7.0mm / s, the powder feeding rate is 4.2g / min, and the corresponding composition is TC4+3.4vol.%Cr 3 C 2 、TC4+6.9vol.%Cr 3 C 2 And TC4+10.5vol.%Cr 3 C 2 The hardness of the coatings were HRC 42-44, HRC 47-49 and HRC 62-65, respectively. The...

Embodiment 3

[0028] Embodiment 3: The titanium-based composite material coating is prepared by laser cladding TC4+TiC on the surface of TC4 alloy by using the present invention.

[0029] In the experiment, TC4 gas-atomized spherical powder and TiC irregular polygonal particles were selected. After mechanical mixing, the powder feeder coaxially sent it into the laser molten pool. The substrate was TC4 alloy with a size of 100×60×6mm. 3 , before cladding, the surface of the sample was polished with sandpaper and wiped clean. Laser cladding process: power 3.0kW, scanning speed 3.0-7.0mm / s, powder feeding rate 4.2g / min, scanning length 50mm, each reciprocating scanning 8 layers, as the scanning speed increases, the cladding path becomes narrower, The cladding height drops, and the hardness of the cladding TC4+20vol.%TiC material is HRC 47 when the scanning speed is 3.0mm / s, and the hardness of the cladding TC4+30vol.%TiC material is HRC 60 (TC4 powder particle size 45 -150μm, TiC particle siz...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for preparing a Ti-based composite with high adaptability on a Ti-alloy surface, which pertains to the field of surface modification of metallic materials. The method comprises such procedures as: weighing by certain proportion spherical Ti alloy powder particles in proper particle sizes (45-150 micro meter) and TiB2, Cr3C2, TiC or B4C powder particles (3.4-30vol%, particle size 38-106 micrometer); mixing the powder evenly by a mechanical way; sending at the set powder-feeding rate the mixed powder by a powder feeder and coaxial powder-feeding nozzles into a molten bath formed by a high-power laser at the surface of a Ti-alloy substrate; the mixed powder carrying out in-situ reaction by the high temperature from the molten bath, and forming such steady and dispersion reinforced phases as in-situ self-grown TiC or TiB. The reinforced phases are featured by small particle size, steady thermal and mechanical properties, free pollution in interfaces, and high bond strength with the substrate. The method can substantially improve the hardness and wear resistance of Ti alloy surfaces, guarantees the high adaptability between the surface modified layer and the substrate, can be used for repairing and surface reinforcing treatment of Ti alloy parts bearing impact vibration load and thermal fatigue, etc.

Description

technical field [0001] The invention relates to a method for obtaining a highly compatible and wear-resistant titanium-based composite material on the surface of a titanium alloy, belonging to the field of surface modification of metal materials. Background technique [0002] Due to their low density, high specific strength, high yield ratio, corrosion resistance and good high-temperature mechanical properties, titanium and titanium alloys are used in aviation, aerospace, ships, weapons, petroleum, chemical, medical and other fields. However, due to the shortcomings of titanium alloys such as low hardness, poor wear resistance, large friction coefficient and instability, the wider application is limited. The hardness of pure titanium is about 150-200HV, and the hardness of titanium alloy is generally lower than 350HV. Aiming at the disadvantage of poor wear resistance of titanium alloys, a variety of surface modification technologies for titanium alloys have been developed....

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C23C24/10B23K26/34
Inventor 张永忠席明哲石力开蔡利芳
Owner 有研科技集团有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap