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Nickel-based brazing material and preparation method thereof

A brazing material, nickel-based technology, applied in the direction of welding/cutting media/materials, welding equipment, manufacturing tools, etc., can solve the problems of poor mechanical properties of welded joints, high brazing temperature, etc., to improve seam filling ability, improve durability Corrosiveness, the effect of preventing the growth of grains

Active Publication Date: 2022-04-22
JIANGSU PROVINCE XUZHOU TECHNICIAN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a nickel-based brazing material and its preparation method, which solves the problems of high brazing temperature required by existing nickel-based brazing materials and poor mechanical properties of welded joints formed

Method used

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Examples

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Effect test

preparation example Construction

[0026] The present invention also provides a kind of preparation method of nickel-based brazing material, comprising the following steps:

[0027] Ni, Mn, Mo, Cr, Si, R are mixed together, followed by smelting, refining, casting, and rolling to obtain nickel-based brazing materials.

[0028] In the present invention, the purity of Ni, Mn, Mo, Cr, Si, R is all greater than 99.9%.

[0029] In the present invention, the protective gas for melting is preferably argon; the melting temperature is preferably 900-1100°C, more preferably 910-1060°C, more preferably 990°C; the melting time is preferably 20-40min, more preferably 23 to 38 minutes, more preferably 28 minutes.

[0030] In the present invention, the protective gas for refining is preferably argon; the refining temperature is preferably 800-900°C, more preferably 810-890°C, more preferably 860°C; the refining time is preferably 10-20min, more preferably 11-18 minutes, more preferably 15 minutes.

[0031] In the present in...

Embodiment 1

[0034] This embodiment provides a nickel-based brazing material, which comprises the following chemical components in terms of weight percent: Mn 14%, Mo 3%, Cr 16%, Si 1.2%, La 6%, and the rest are Ni and unavoidable impurities .

[0035] Its preparation method comprises the following steps:

[0036] Mix Ni, Mn, Mo, Cr, Si and La according to the above mass percentages, place in a heating furnace and melt at 1020°C for 25 minutes under an argon atmosphere, then heat-preserve and refine at 870°C for 13 minutes, and cast to obtain ingots after refining ;

[0037] The ingot was hot-rolled at 960° C. for 45 minutes, and then cold-rolled to obtain a nickel-based brazing material with a thickness of 0.5 mm.

Embodiment 2

[0039] This embodiment provides a nickel-based brazing material, which comprises the following chemical components in terms of weight percent: Mn 9%, Mo 5%, Cr 13%, Si 2%, Ce 4%, and the rest are Ni and unavoidable impurities .

[0040] Its preparation method comprises the following steps:

[0041] Mix Ni, Mn, Mo, Cr, Si and Ce according to the above mass percentages, place in a heating furnace and melt at 980°C for 30 minutes under an argon atmosphere, then heat-preserve and refine at 900°C for 18 minutes, and cast ingots after refining ;

[0042] The ingot was hot-rolled at 880° C. for 50 minutes, and then cold-rolled to obtain a nickel-based brazing material with a thickness of 0.7 mm.

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Abstract

The invention belongs to the technical field of brazing materials, and discloses a nickel-based brazing material and a preparation method thereof. The nickel-based brazing material comprises the following chemical components in percentage by weight: 8-17% of Mn, 2-6% of Mo, 10-20% of Cr, 0.5-3% of Si, 2-10% of R and the balance of Ni and inevitable impurities. Wherein R is a rare earth element. Manganese and silicon in the brazing filler metal reduce the melting point of the brazing filler metal, meanwhile, silicon is added to improve oxidation resistance and fluidity, molybdenum is added to improve the wettability of the brazing filler metal to a weldment, rare earth is combined to further improve the joint filling capacity of the brazing filler metal, the toughness and strength of a brazed joint are improved, and the service life of the brazing filler metal is prolonged. And the problem of high brittleness of a brazed joint caused by the existence of silicon is solved. In addition, chromium can form an anti-oxidation layer, and the corrosion resistance of the brazed joint is improved.

Description

technical field [0001] The invention relates to the technical field of brazing materials, in particular to a nickel-based brazing material and a preparation method thereof. Background technique [0002] With the rapid development of industry, a variety of parts with complex structures have appeared in various fields, and the traditional metallurgical technology is increasingly unable to meet the preparation of complex structures, so welding technology has been paid attention to. During the welding process, the brazing filler metal is used as the connecting part between the weldments, and its own properties directly affect the mechanical properties, appearance, stability and other indicators of the brazing joint. Therefore, the selection of brazing materials is very important. [0003] At this stage, for the welding of stainless steel and ceramic materials, nickel-based solder is usually used, and due to the large difference in thermal expansion coefficient between the two, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/304B23K35/40
Inventor 李兴会王芝玲薛勇
Owner JIANGSU PROVINCE XUZHOU TECHNICIAN INST
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