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

Brazing filler metal for vacuum brazing of high-nitrogen steel and preparation method of brazing filler metal

A technology of high-nitrogen steel and brazing material, which is applied in the field of high-nitrogen steel welding, can solve problems such as the inability to guarantee the connection strength and service life of high-nitrogen steel, and the inability to ensure the uniformity of the connection structure of the base material of high-nitrogen steel, so as to improve the connection Strength and mechanical properties, ensuring tissue uniformity, and enhancing mechanical properties

Active Publication Date: 2019-01-04
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

However, the vacuum brazing method is introduced into high-nitrogen steel welding (that is, the welding of high-nitrogen steel and high-nitrogen steel), especially for the self-made high-nitrogen steel of 1Cr26Mn22N (composed of 0.9-2.1 parts N, 51-65 parts Fe, 1.9 -2.7 parts of Ni, 23-28 parts of Cr, 19-25 parts of Mn, 1.2-1.6 parts of Mo, 0.2-0.6 parts of C, 0.02-0.05 parts of S, 0.05-0.08 parts of P and 0.5-0.8 parts of Si (by weight ) composition), because the existing brazing material cannot avoid the precipitation of nitrogen in high nitrogen steel on the one hand, and cannot ensure the uniformity of the structure of the high nitrogen steel base metal connection, on the other hand, due to the nitrogen in the brazing process Precipitation is easy to produce pores, which cannot guarantee the connection strength and service life of high nitrogen steel
At present, there is no data report on brazing filler metals for brazing high nitrogen steel

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
  • Brazing filler metal for vacuum brazing of high-nitrogen steel and preparation method of brazing filler metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] For 0.9 parts of N, 65 parts of Fe, 1.9 parts of Ni, 23 parts of Cr, 19 parts of Mn, 1.2 parts of Mo, 0.2 parts of C, 0.02 parts of S, 0.05 parts of P and 0.5 parts of Si (by weight) When the steel is vacuum brazed, use 25 parts of Pd, 46 parts of Ni, 36 parts of Cr, 2.8 parts of vanadium-nickel-coated graphene, 12 parts of Mn, 7 parts of Re, 6 parts of Si and 2 parts of B (by weight) The brazing filler metal of composition, this brazing filler metal adopts following method to prepare:

[0036] The first step, utilize FAD5001 electronic balance, weigh 15g distilled water, 15g water-based adhesive, 5g acetone and 6g molar concentration be the alcohol of 15.97mol / L, above-mentioned water-based adhesive is made of zinc phosphate 36 parts by weight, chlorinated 45 parts by weight of ammonium, 15 parts by weight of polyethylene glycol, 14 parts by weight of butyl cyanoacrylate, and 7 parts by weight of ammonium persulfate; meanwhile, configure Pd, Ni, Cr, vanadium-coated nic...

Embodiment 2

[0044] For 2.1 parts of N, 51 parts of Fe, 2.7 parts of Ni, 28 parts of Cr, 25 parts of Mn, 1.6 parts of Mo, 0.6 parts of C, 0.05 parts of S, 0.08 parts of P and 0.8 parts of Si (by weight) When the steel is vacuum brazed, use 28 parts of Pd, 39 parts of Ni, 39 parts of Cr, 5.8 parts of vanadium-nickel-coated graphene, 15 parts of Mn, 11 parts of Re, 9 parts of Si and 5.5 parts of B (by weight) Composition of solder. The solder is prepared as follows:

[0045] The first step, utilize FAD5001 electronic balance, weigh 30g distilled water, 30g water-based binder and 12g acetone, 13g molar concentration be the alcohol of 15.97mol / L, above-mentioned water-based binder is made of 24 parts by weight of zinc phosphate, chlorinated 61 parts by weight of ammonium, 23 parts by weight of polyethylene glycol, 22 parts by weight of butyl cyanoacrylate, and 11 parts by weight of ammonium persulfate; meanwhile, configure Pd, Ni, Cr, vanadium-nickel graphene, Mn, Re in proportion , Si, B br...

Embodiment 3

[0052] For 1.5 parts of N, 58 parts of Fe, 2.3 parts of Ni, 25.5 parts of Cr, 22 parts of Mn, 1.4 parts of Mo, 0.4 parts of C, 0.035 parts of S, 0.065 parts of P and 0.65 parts of Si (by weight) When the steel is vacuum brazed, use 26.5 parts of Pd, 42.5 parts of Ni, 37.5 parts of Cr, 4.3 parts of vanadium-nickel-coated graphene, 13.5 parts of Mn, 9 parts of Re, 7.5 parts of Si and 3.75 parts of B (by weight) The brazing filler metal of composition, this kind brazing filler metal adopts following method to prepare:

[0053] The first step, utilizing FAD5001 electronic balance, weighing 22.5g distilled water, 22.5g water-based binder and 8.5g acetone, 9.5g molar concentration is the alcohol of 15.97mol / L, and above-mentioned water-based binder is made of zinc phosphate 30 Parts by weight, 53 parts by weight of ammonium chloride, 19 parts by weight of polyethylene glycol, 18 parts by weight of butyl cyanoacrylate, and 9 parts by weight of ammonium persulfate; meanwhile, configur...

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
tensile strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses brazing filler metal for vacuum brazing of high-nitrogen steel. The brazing filler metal for vacuum brazing of the high-nitrogen steel is composed of, by weight, 25-28 parts ofPd, 39-46 parts of Ni, 36-39 parts of Cr, 2.8-5.8 parts of vanadium plated nickel graphene, 12-15 parts of Mn, 7-11 parts of Re, 6-9 parts of Si and 2-5.5 parts of B. During preparation, a method comprises the following steps that firstly, distilled water, a water-based binding agent, acetone and ethyl alcohol are weighed, raw material alloy powder of the Pd, the Ni, the Cr, the vanadium plated nickel graphene, the Mn, the Re, the Si and the B is prepared according to the proportion and is ground to 106 micons-150 microns to be used; secondly, the acetone, the ethyl alcohol, the water-based binding agent and the distilled water which are obtained in the first step are arranged in a beaker and stirred, and a solution without sediment is obtained; and thirdly, 45-70 parts of the raw material alloy powder obtained in the first step is taken, 12-18 parts of an auxiliary additive is added into the 45-70 parts of the raw material alloy powder, a mixture is added into the solution obtained in the second step, stirring and vacuumizing are carried out, and the pasty brazing filler metal is prepared. According to the brazing filler metal, during brazing, the defect that in traditional welding, air holes are prone to being generated is overcome, the element of nitrogen is almost not lost, and the structure homogeneity of the high-nitrogen steel base metal is guaranteed.

Description

technical field [0001] The invention relates to the technical field of high-nitrogen steel welding, in particular to a solder used for vacuum brazing high-nitrogen steel and a preparation method thereof. Background technique [0002] High-nitrogen steel has the advantages of corrosion resistance, oxidation resistance, wear resistance and excellent mechanical properties. It is one of the important materials for the manufacture of aviation, ships and weapons. The welding technology of high-nitrogen steel is an important process that determines its application scope. link. At present, high-nitrogen steel welding technology is mainly based on friction welding, friction stir welding, TIG welding, MIG welding, explosive welding, gas shielded welding, laser and its hybrid welding. The nitrogen content of the steel itself is high, and the welding porosity problem caused by the nitrogen precipitation of the base metal often occurs during the welding process, which in turn induces th...

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): B23K35/363B23K35/40B23K1/008
CPCB23K1/008B23K35/362B23K35/40
Inventor 王星星李帅杜全斌宋晓国夏月庆石磊顾立勇
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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