Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Welding method of high-bonding-strength copper-steel bimetallic antifriction wear-resistant composite material

A technology combining strength and composite materials, applied in welding equipment, metal processing equipment, non-electric welding equipment, etc., can solve problems such as increasing industrial costs, relative weight segregation of lead lubrication, and unfavorable enterprise production and manufacturing, to reduce economic costs, reduce Soldering temperature, the effect of avoiding shrinkage and shrinkage

Active Publication Date: 2021-07-16
HEFEI UNIV OF TECH
View PDF11 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the diffusion welding process of copper / steel bimetallic composite materials, due to the differences in physical and chemical properties such as melting point, thermal conductivity, and linear expansion coefficient of copper and steel, the quality of welded joints and interface bonding strength are not ideal, and it is difficult to meet high pressure and heavy loads. Condition requirements
In the industry, high-quality joints are often obtained by increasing the welding pressure and welding temperature, but these processes increase the industrial cost, and at the same time put forward higher requirements for the performance of the equipment, which is not conducive to the production and manufacturing of enterprises.
In addition, if a lead lubricating phase with a low melting point is added to the copper alloy, the specific gravity segregation of the lead lubricating phase will occur during the high temperature welding process, resulting in large lead aggregates at the interface, which will eventually affect the performance and application of the material

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
  • Welding method of high-bonding-strength copper-steel bimetallic antifriction wear-resistant composite material
  • Welding method of high-bonding-strength copper-steel bimetallic antifriction wear-resistant composite material
  • Welding method of high-bonding-strength copper-steel bimetallic antifriction wear-resistant composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The welding operation steps of a high bonding strength copper-steel bimetallic anti-friction and wear-resistant composite material are as follows:

[0027] (1) Machine 45# steel and lead bronze alloy rod (ZCuSn10Pb10) respectively to obtain a steel substrate with a size of Ø30×7mm and a copper sheet with a size of φ30×3mm. The surface of the steel substrate is sandblasted and cleaned with ethanol, and the surface of the copper alloy is Perform rough sanding.

[0028] (2) Weigh 6g of copper-tin alloy powder (CuSn10), and press the copper-tin alloy powder into a green body in a hydraulic press, and the pressure for pressing the green body is 750MPa.

[0029] (3) Combine the green body in step 2 with the steel substrate treated in step 1 and put it into a mesh belt furnace for sintering and cladding. The temperature in the first zone is 680°C, the temperature in the second zone is 770°C, and the temperature in the third zone is 870°C, the temperature in zones 4 to 6 is 11...

Embodiment 2

[0034] Step (1) is the same as embodiment 1;

[0035] Step (2) is the same as embodiment 1;

[0036] Step (3), combine the green body in step 2 with the steel substrate treated in step 1 and put it into a mesh belt furnace for sintering and cladding. The temperature in the first zone is 680°C, the temperature in the second zone is 770°C, and the temperature in the third zone The temperature is 870°C, the temperature in zones 4 to 6 is 1100°C, the lengths of the mesh belts corresponding to each temperature zone are 2.45m, 2.45m, 2.45m, and 7.35m, and the belt speed is 70mm / min. During this period, the copper-tin alloy powder is completely A liquid phase is formed to spread and wet the surface of the steel substrate. Choose N 2 +H 2 As a protective atmosphere, it ensures production safety and prevents the generation of inclusions and oxides at the interface. After a period of time in the high temperature zone, metallurgical bonding occurs at the copper / steel interface, which ...

Embodiment 3

[0041] Step (1) is the same as embodiment 1;

[0042] Step (2) is the same as embodiment 1;

[0043] Step (3), combine the green body in step 2 with the steel substrate treated in step 1 and put it into a mesh belt furnace for sintering and cladding. The temperature in the first zone is 680°C, the temperature in the second zone is 770°C, and the temperature in the third zone The temperature is 870°C, the temperature in zones 4 to 6 is 1150°C, the lengths of mesh belts corresponding to each temperature zone are 2.45m, 2.45m, 2.45m, and 7.35m, and the belt speed is 70mm / min. During this period, the copper-tin alloy powder is completely A liquid phase is formed to spread and wet the surface of the steel substrate. Choose N 2 +H 2 As a protective atmosphere, it ensures production safety and prevents the generation of inclusions and oxides at the interface. After a period of time in the high temperature zone, metallurgical bonding occurs at the copper / steel interface, which grea...

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
thicknessaaaaaaaaaa
shear strengthaaaaaaaaaa
shear strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a welding method of a high-bonding-strength copper-steel bimetallic antifriction wear-resistant composite material, and belongs to the technical field of dissimilar connection of bimetallic composite materials. The method comprises the following operation steps that (1) a steel sheet and a copper alloy sheet which are the same in area size are taken and subjected to surface sand blasting and rough polishing treatment correspondingly; (2) copper-tin alloy powder is pressed into a sheet-shaped green body; (3) the sheet-shaped green body is placed on a steel sheet, sintering and cladding are conducted in a mesh belt furnace, and a steel sheet cladding piece with a cladding layer is obtained; (4) the cladding layer surface of the steel sheet cladding piece and the copper alloy sheet are folded, diffusion welding is conducted in a vacuum sintering furnace, and a welding piece is obtained; and (5) the welding piece is subjected to low-temperature annealing treatment and water quenching, the copper-steel bimetallic composite material is obtained, and the shear strength of a welding interface is 240-280 MPa. According to the method, the bonding strength of the cladding layer and the steel layer is greatly improved, and due to the fact that the cladding layer is very thin, the defects of shrinkage porosity, shrinkage cavity, cracking and the like in common fusion welding are overcome.

Description

technical field [0001] The invention belongs to the technical field of heterogeneous connection of bimetallic composite materials, and in particular relates to a friction-reducing and wear-resistant bimetallic material of lead bronze and medium carbon steel with high bonding strength and a preparation method thereof, which is suitable for key friction pairs of sliding bearings Preparation of copper / steel bimetallic composites required. Background technique [0002] Copper / steel bimetallic composite materials have been widely used in parts such as plunger pumps, aeroengines, and sliding bearings because of their good anti-friction properties and high load-carrying capacity. At present, the process of preparing the composite material in the industry includes melting casting method, powder metallurgy method and diffusion welding method, etc. The diffusion welding method refers to the process of welding the materials at the welding interface under a certain temperature and press...

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
Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B23K20/00B23K20/22
CPCB23P15/00B23K20/00B23K20/22
Inventor 尹延国张钰晖吴玉程李蓉蓉
Owner HEFEI UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com