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

A low-expansion 4j42 alloy interlayer auxiliary brazing material to improve the quality of silicon carbide-niobium brazing connection

A connection quality and intermediate layer technology, applied in welding equipment, auxiliary devices, metal processing equipment, etc., can solve the problems of large residual stress in the brazing connection of silicon carbide and niobium, poor reaction of the ceramic side interface, etc., and achieve optimal weld structure Reaction with the interface, improvement of plasticity and toughness, and the effect of preventing cracks

Active Publication Date: 2022-08-02
HARBIN INST OF TECH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the problems of excessive residual stress in the existing silicon carbide and niobium brazing connection and poor reaction of the ceramic side interface, and provides a method for improving the quality of the silicon carbide-niobium brazing connection by assisting the solder in the middle layer of the low-expansion 4J42 alloy

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
  • A low-expansion 4j42 alloy interlayer auxiliary brazing material to improve the quality of silicon carbide-niobium brazing connection
  • A low-expansion 4j42 alloy interlayer auxiliary brazing material to improve the quality of silicon carbide-niobium brazing connection

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0019] Embodiment 1: In this embodiment, a low-expansion 4J42 alloy intermediate layer auxiliary brazing material improves the quality of silicon carbide-niobium brazing connection, which is carried out according to the following steps:

[0020] 1. Pre-processing:

[0021] The titanium-zirconium-copper-nickel brazing filler metal is added to the binder to obtain the brazing filler metal containing the binder, and the brazing filler metal containing the binder is coated on the niobium metal surface to be welded to obtain the first brazing filler metal layer, and the first brazing filler metal layer is obtained. A 4J42 alloy foil with a thickness of 100 μm to 200 μm is placed on the solder layer, and then a layer of solder containing an adhesive is coated on the 4J42 alloy foil to obtain a second solder layer, which is placed on the second solder layer. Silicon carbide, and finally heated and dried to obtain the parts to be welded;

[0022] 2. Vacuum brazing:

[0023] Place th...

specific Embodiment approach 2

[0028]Embodiment 2: The difference between this embodiment and Embodiment 1 is that the binder described in Step 1 is a carboxymethyl cellulose binder or an ethyl cellulose binder. Others are the same as the first embodiment.

specific Embodiment approach 3

[0029] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the mass percentage of Ti in the titanium-zirconium-copper-nickel solder described in step 1 is 41.14%, and the mass percentage of Zr is 34.36%, The mass percentage of Cu is 14.67%, and the mass percentage of Ni is 9.83%. Others are the same as in the first or second embodiment.

[0030] The titanium zirconium copper nickel brazing filler metal is Ti41.14-Zr34.36-Cu14.67-Ni9.83.

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

A low-expansion 4J42 alloy intermediate layer auxiliary brazing material improves the quality of silicon carbide-niobium brazing connection, and the invention relates to a method for silicon carbide-niobium brazing connection. The invention solves the problems of excessive residual stress in the brazing connection between silicon carbide and niobium and poor reaction of the ceramic side interface. Methods: 1. Pretreatment; 2. Vacuum brazing. The invention is used for the low-expansion 4J42 alloy intermediate layer auxiliary brazing material to improve the quality of silicon carbide-niobium brazing connection.

Description

technical field [0001] The invention relates to a silicon carbide-niobium brazing connection method. Background technique [0002] Silicon carbide ceramics have great application potential in the field of high temperature structures due to their high strength, corrosion resistance, creep resistance and excellent high temperature properties. It has become a structural material with broad application prospects in the fields of aerospace, petrochemical equipment and nuclear power engineering. [0003] However, silicon carbide also has the disadvantages of high brittleness and poor processing performance. It is difficult to make parts with complex shapes or large sizes, which limits its application in the engineering field. In the process of promoting the application of silicon carbide materials, it is inevitable to involve the application of silicon carbide and metal composites. At present, the connection between silicon carbide and various metal materials has been realized. ...

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 Patents(China)
IPC IPC(8): B23K1/008B23K1/20B23K3/08
CPCB23K1/008B23K1/20B23K1/203B23K3/082
Inventor 亓钧雷李培鑫霸金曹健冯吉才
Owner HARBIN INST 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