Dissimilar material brazing method of porous intermediate layer structure brazing seam

A technology of dissimilar materials and brazing methods, applied in the field of material welding, can solve the problems of weakening the mechanical properties of joints, joint damage, large residual stress of joints, etc., and achieve the effect of simple and feasible operation, reducing residual stress and improving mechanical properties

Active Publication Date: 2015-04-01
HARBIN INST OF TECH
View PDF7 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention solves the problem that the existing dissimilar materials are prone to produce large residual stress during the brazing process, which seriously weakens the mechani

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
  • Dissimilar material brazing method of porous intermediate layer structure brazing seam

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0015] Specific implementation mode 1: Combination figure 1 To describe this embodiment in detail, the method for brazing dissimilar materials of the porous intermediate layer structure brazing seam described in this embodiment is specifically carried out according to the following steps:

[0016] 1. Grind the ceramic matrix composite material with sandpaper and clean it with acetone for 10min-20min to obtain a ceramic matrix composite material with impurities removed from the surface. Grind the metal material with sandpaper and clean it with acetone for 10min-20min to obtain a metal material with impurities removed from the surface;

[0017] 2. Mix the nano-alumina template and the solder uniformly to obtain the composite porous intermediate layer solder. The ceramic matrix composite material with impurities removed from the surface and the metal material with impurities removed from the surface are sequentially stacked, and then the composite porous intermediate layer solder is pl...

Example Embodiment

[0022] Specific embodiment two: this embodiment is different from specific embodiment one in that the ceramic matrix composite material described in step one is SiC ceramics, SiO 2 -BN ceramic or SiO 2 ceramics. Others are the same as the first embodiment.

Example Embodiment

[0023] Specific embodiment three: This embodiment is different from one of specific embodiments one or two in that the nano-alumina template described in step two has a pore size of 20 nm to 400 nm and a thickness of 20 μm to 60 μm. Others are the same as the first or second embodiment.

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
Apertureaaaaaaaaaa
Thicknessaaaaaaaaaa
Apertureaaaaaaaaaa
Login to view more

Abstract

The invention discloses a dissimilar material brazing method of a porous intermediate layer structure brazing seam, relates to the field of welding of materials, and aims to solve the problems that great residual stress can be easily generated by a connector in the existing brazing process of the dissimilar material, the mechanical property of the connector is greatly reduced, even the connected connector is damaged. The method comprises the following steps of grinding and removing impurities on a ceramic matrix composite material and a metal material, then uniformly mixing a nanometer aluminum oxide template with a brazing filler to obtain a composite porous intermediate layer brazing filler, sequentially stacking the ceramic matrix composite material and the metal material, subsequently putting the composite porous intermediate layer brazing filler between the to-be-welded surfaces of the ceramic matrix composite material and the metal material to obtain a to-be-welded part; putting the to-be-welded part in a vacuum brazing furnace, vacuumizing, preserving heat at the high temperature, and finally cooling to the room temperature, thus completing the dissimilar material brazing process of the porous intermediate layer structure brazing seam. The method is suitable for brazing the dissimilar material of the porous intermediate layer structure brazing seam.

Description

technical field [0001] The invention relates to the field of material welding. Background technique [0002] In order to meet some special needs or give full play to the performance of materials, it is necessary to combine dissimilar materials, and then it is necessary to realize the connection of dissimilar materials. Judging from the current welding methods, brazing is one of the most potential technologies to realize the connection of ceramic materials and dissimilar materials, and the brazing method has been widely studied. Compared with other welding methods, it has the advantages of simple process, low cost, and suitable for connection between dissimilar materials. However, brazing of dissimilar materials mainly faces the following two major problems. One: The difficulty of connection is mainly manifested in the difference in physical properties and chemical properties of dissimilar materials. During the brazing process, the joints are prone to large thermal stress....

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): B23K1/008B23K1/19B23K1/20C04B37/02
CPCB23K1/008B23K1/19B23K1/20B23K1/206C04B37/02
Inventor 亓钧雷林景煌周玉杨郭佳乐张兴凯冯吉才
Owner HARBIN INST OF TECH
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