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

Composite solder for brazing high-nitrogen steel and preparation method thereof

A technology of composite brazing filler metal and high nitrogen steel is applied in the field of brazing filler metals in the field of metal welding to achieve the effects of improving connection strength and mechanical properties, enhancing joint strength and enhancing mechanical properties

Active Publication Date: 2019-01-01
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
View PDF10 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the difficulties in selecting the ratio of weld depth and width and the high In order to solve the serious problem of nitrogen element loss in nitrogen steel, the invention provides a composite solder for high nitrogen steel brazing and its preparation method. When the composite solder of the present invention is used to braze high nitrogen steel, the high nitrogen steel The base metal hardly melts, so that the nitrogen element does not lose, overcomes the shortcomings of the pores of the traditional welding method, makes the nitrogen element almost no loss, and improves the connection strength and mechanical properties of the joint to a certain extent, and the shape of the welded joint is very good

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A kind of composite solder for high-nitrogen steel brazing, according to the weight ratio, its active ingredient is composed of 25 parts of Pd, 8 parts of Ni, 36 parts of Cr, 2.5 parts of nickel-coated graphene or vanadium-coated graphite Alkene, 5.6 parts of Mo, 23 parts of Mn, 7 parts of Re, 3 parts of Si, 2 parts of B and 0.35 parts of Nb;

[0057] The preparation method of above-mentioned composite solder is as follows:

[0058] 1) Weigh the alloy powder containing the above ingredients, and mix it with nickel-coated graphene or vanadium-coated graphene powder to form a mixed powder, and the weight ratio of each component in the mixed powder meets the above requirements;

[0059] 2) According to the weight ratio, weigh 15 parts of distilled water, 15 parts of water-based binder and 5 parts of acetone to mix, and stir evenly until no precipitation occurs to form a mixed solution, then weigh 45 parts to prepare in step 1) mixed powder, and added to the mixed solution...

Embodiment 2

[0077] A kind of composite solder for high-nitrogen steel brazing, according to the weight ratio, its active ingredient is composed of 28 parts of Pd, 13 parts of Ni, 41 parts of Cr, 3.9 parts of nickel-coated graphene or vanadium-coated graphite Alkene, 6.8 parts of Mo, 27 parts of Mn, 11 parts of Re, 6 parts of Si, 4.5 parts of B and 0.6 parts of Nb;

[0078] The preparation method of above-mentioned composite solder is as follows:

[0079] 1) Weigh the alloy powder containing the above ingredients, and mix it with nickel-coated graphene or vanadium-coated graphene powder to form a mixed powder, and the weight ratio of each component in the mixed powder meets the above requirements;

[0080] 2) According to the weight ratio, weigh 30 parts of distilled water, 30 parts of water-based binder and 12 parts of acetone to mix, and stir evenly until no precipitation occurs to form a mixed solution, then weigh 70 parts to prepare in step 1) mixed powder, and added to the mixed solu...

Embodiment 3

[0098] A kind of composite solder for high-nitrogen steel brazing, according to the weight ratio, its active ingredient is composed of 26.5 parts of Pd, 10.5 parts of Ni, 38.5 parts of Cr, 3.2 parts of nickel-coated graphene or vanadium-coated graphite Alkene, 6.2 parts of Mo, 25 parts of Mn, 9 parts of Re, 4.5 parts of Si, 3.25 parts of B and 0.45 parts of Nb;

[0099] The preparation method of above-mentioned composite solder is as follows:

[0100] 1) Weigh the alloy powder containing the above ingredients, and mix it with nickel-coated graphene or vanadium-coated graphene powder to form a mixed powder, and the weight ratio of each component in the mixed powder meets the above requirements;

[0101] 2) According to the weight ratio, weigh 22.5 parts of distilled water, 22.5 parts of water-based binder and 8.5 parts of acetone to mix, and stir evenly until no precipitation occurs to form a mixed solution, then weigh 57.5 parts of the preparation in step 1) mixed powder, and...

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

No PUM Login to View More

Abstract

The invention relates to a composite solder for brazing high-nitrogen steel and a preparation method thereof. The composite solder is prepared from the effective components including Pd, Ni, Cr, nickel-plated graphene or vanadium plated graphene, Mo, Mn, Re, Si, B and Nb. In the brazing process by using the composite solder, high-nitrogen steel base metal is hardly melted, so that nitrogen is notlost. The defect of apore in the traditional welding mode is overcome, and the nitrogen almost has no loss. Moreover, as the high-nitrogen steel base metal is hardly melted, no deformation can occur,the connection strength and mechanical properties of a joint are improved to some extent, and awelded joint is well formed.

Description

technical field [0001] The invention relates to a brazing filler metal in the field of metal welding, in particular to a composite brazing filler metal used for high nitrogen steel brazing and a preparation method thereof. Background technique [0002] High-nitrogen steel has properties such as corrosion resistance, oxidation resistance, wear resistance and excellent mechanical properties. These excellent properties make it one of the important materials in the manufacture of aviation, ship and weapon equipment, and welding technology determines its application scope. important process link. Due to the high nitrogen content of high-nitrogen steel itself, the welding porosity problem is often caused by the precipitation of base metal nitrogen during the welding process. The precipitation of nitrides in the heat-affected zone is a major loss of solid-solution nitrogen, and induces the appearance of other hard and brittle phases, thereby weakening the weld. Material properties...

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): B23K35/24B23K35/40
CPCB23K35/24B23K35/40
Inventor 王星星李帅郑鹏杜全斌宋晓国石磊
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com