Method and device for performing electric magnetization resistance welding-braze welding compounding on dissimilar materials

An electromagnetic excitation, dissimilar material technology, applied in welding equipment, metal processing equipment, metal processing, etc., can solve the problems of short liquid molten pool retention time, easy defects in joints, and unfavorable liquid solder to fully spread and base metal mutual diffusion and other problems , to improve the connection quality, inhibit the formation of harmful substances, and improve the strength

Inactive Publication Date: 2010-09-29
CHONGQING UNIV
View PDF3 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to aim at the existing electric resistance brazing technology, because the liquid molten pool formed by the solder has a short retention time, which is not conducive to the sufficient spreading of the liquid solder on the surface of the base metal and mutual diffusion with the base metal, and the joint is easy to produce Defects and other problems, use the electromagnetic excitation resistance melting-brazing composite welding method and equipment of dissimilar materials assisted by an external magnetic field. The solder is assisted by electromagnetic stirring and orderly control, and the molten liquid solder is supplemented by electro

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 and device for performing electric magnetization resistance welding-braze welding compounding on dissimilar materials
  • Method and device for performing electric magnetization resistance welding-braze welding compounding on dissimilar materials
  • Method and device for performing electric magnetization resistance welding-braze welding compounding on dissimilar materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1.2mm and ZK60 magnesium alloy workpiece overlap electromagnetic excitation resistance melting-brazing, welding process parameters are: the size of the upper and lower electrodes are Φ16mm and Φ8mm respectively, 42CrMnSi steel is placed on the lower electrode, and the flux and solder are placed on 42CrMnSi Between the steel and the ZK60 magnesium alloy workpiece, the ZK60 magnesium alloy workpiece is located on the upper electrode; the welding current is 12KA; the auxiliary magnetic field strength is 800Gs; the welding time is 0.2-0.6s; the electrode pressure is 2.4-3.7KN. Through parameter optimization, the required resistance fusion-brazing structure and performance can be achieved.

Embodiment 2

[0037] 1.6mm 7075 aluminum alloy and AZ31B magnesium alloy workpiece are electromagnetically excited resistance seam welding and melting-brazing. The welding process parameters are: the arc radius of the roller is 100mm; the welding current is 36KA; the auxiliary magnetic field strength is 800Gs; the number of points per minute is 120-150 point; electrode pressure 5.2-8.7KN. Flux and solder are placed between the 7075 aluminum alloy and the AZ31B magnesium alloy workpiece, and the welding of high-quality resistance fusion-brazing joints is realized through parameter optimization.

Embodiment 3

[0039] 3mm thick AZ91 magnesium alloy electromagnetic excitation resistance spot welding fusion-brazing, welding process parameters are: the upper and lower electrodes have the same size, the electrode spherical radius is 200mm; the welding current is 12-32KA; the auxiliary magnetic field strength is 1200Gs, and the direction is a transverse magnetic field ; The electrode pressure is 3.6-5.8KN, the brazing material is Zn-Al-Cu eutectic composition, and the brazing flux is chloride brazing flux prepared from KCl, NaCl, LiCl and NaF. Through parameter optimization, the welding of high-quality resistance fusion-brazing joints is realized.

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
Sizeaaaaaaaaaa
Sizeaaaaaaaaaa
Sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method and a device for performing electric magnetization resistance welding-braze welding compounding on dissimilar materials by assistance of an applied magnetic field. In the process of performing resistance welding-braze welding on the dissimilar metal material, a liquid solder is subjected to auxiliary electromagnetic stirring and ordered control, and the molten liquid solder is subjected to the reinforced booster action of electromagnetic stirring and electric magnetization by using an external applied alternating magnetic field which is generated by a magnet exciting coil in a welding area so as to promote directional flow of the liquid solder, and rupture of membranes, wetting, spreading and diffusion of the liquid solder on the surface of the metal material with a higher melting point, promote the liquid solder and a base metal which is molten by the metal material with a lower melting point to be mixed fully, promote interdiffusion of elements and compositions between the solder and the base metal and alloying between the two, improve uniformity of compositions of a soldered seam, reduce the weld defects, optimize the texture and the performance of the soldered seam, and improve the resistance soldered joint; and the device has the advantages of simple structure, flexible application, lower cost, good effect, and easy implementation.

Description

technical field [0001] The invention relates to an electromagnetic excitation resistance fusion-brazing composite welding method and equipment assisted by an external magnetic field. Background technique [0002] Brazing technology uses welding wire with a melting point lower than that of the base metal as the welding material (brazing material). During welding, the welding wire (brazing material) melts but the base material does not melt, so as to realize the connection between the same or dissimilar metal materials. Resistance brazing is a brazing method that uses resistance heat generated by current passing through the weldment or a heating block in contact with the weldment to heat the weldment and melt the solder. During brazing, a certain pressure should be applied to the braze. The basic principle of resistance brazing is the same as that of resistance welding. Compared with other brazing methods, it has the advantages of rapid heating, high productivity, and small he...

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): B23K1/00B23K3/00
Inventor 罗键赵国际刘德佳冷海波
Owner CHONGQING UNIV
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