Hf-containing multi-element boron-free nickel-based alloy brazing filler metal, and preparation method and brazing method of Hf-containing multi-element boron-free nickel-based alloy brazing filler metal

A technology of nickel-based alloy and brazing method, applied in metal processing equipment, welding medium, manufacturing tools, etc., can solve problems such as residual stress thermal damage, chemical erosion, diamond graphitization, etc., to improve wear resistance and lower melting point , to suppress the effect of generating

Active Publication Date: 2021-10-01
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to solve the problems that the higher brazing temperature of Ni-based active solder causes thermal damage such as graphitization, chemi

Method used

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  • Hf-containing multi-element boron-free nickel-based alloy brazing filler metal, and preparation method and brazing method of Hf-containing multi-element boron-free nickel-based alloy brazing filler metal
  • Hf-containing multi-element boron-free nickel-based alloy brazing filler metal, and preparation method and brazing method of Hf-containing multi-element boron-free nickel-based alloy brazing filler metal
  • Hf-containing multi-element boron-free nickel-based alloy brazing filler metal, and preparation method and brazing method of Hf-containing multi-element boron-free nickel-based alloy brazing filler metal

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Composition (mass percentage): Ni: 55.0%, Cr: 15.0%, Si: 5.0%, Cu: 20.0%, Sn: 5.0%, Hf: 0%.

[0041] Preparation:

[0042] (1) Weigh the corresponding elemental metal raw materials according to the mass percentage of each element: use sandpaper to polish the oxide skin and impurities on the surface of the corresponding elemental metal raw materials, and weigh the corresponding 5.5g Ni, 1.5g Cr, 0.5g Si, 2g Cu, 0.5g Sn , and ultrasonically cleaned with acetone for about 10 minutes, dried for later use.

[0043] (2) Place the dried metal raw material in a vacuum electric arc furnace, and evacuate to a vacuum degree of 3×10 -3 Pa, and Ar gas is passed in as a protective gas, and the raw materials of various metals are put into the crucible from top to bottom according to the melting point, and the Sn metal is at the bottom, which can effectively avoid the volatilization of raw materials during smelting; The material alloy is remelted-solidified-remelted-solidified 3 to 4...

Embodiment 2

[0049] Composition (mass percentage): Ni: 54.0%, Cr: 15.0%, Si: 5.0%, Cu: 20.0%, Sn: 5.0%, Hf: 1.0%.

[0050] (1) Weigh the corresponding elemental metal raw materials according to the mass percentage of each element: sand the scale and impurities on the surface of the corresponding elemental metal raw materials and weigh the corresponding 5.4g Ni, 1.5g Cr, 0.5g Si, 2g Cu, 0.5g Sn and 0.1gHf, and ultrasonically cleaned with acetone for about 10 minutes, dried for use.

[0051] (2) Place the dried metal raw material in a vacuum electric arc furnace, and evacuate to a vacuum degree of 3×10 -3 Pa, and Ar gas is introduced as a protective gas, and the raw materials of various metals are put into the crucible from top to bottom according to the melting point, and the Sn metal is at the bottom, which can effectively avoid the volatilization of raw materials during smelting; The material alloy is remelted-solidified-remelted-solidified 3 to 4 times, and after the solder alloy is coo...

Embodiment 3

[0057] Composition (mass percentage): Ni: 51.0%, Cr: 15.0%, Si: 5.0%, Cu: 20.0%, Sn: 5.0%, Hf: 4.0%

[0058] (1) Weigh the corresponding elemental metal raw materials according to the mass percentage of each element: use sandpaper to polish the oxide skin and impurities on the surface of the corresponding elemental metal raw materials, and weigh the corresponding 5.1g Ni, 1.5g Cr, 0.5g Si, 2g Cu, 0.5g Sn and 0.4gHf, and ultrasonically cleaned with acetone for about 10 minutes, dried for later use.

[0059] (2) Place the dried metal raw material in a vacuum electric arc furnace, and evacuate to a vacuum degree of 3×10 -3 Pa, and Ar gas is introduced as a protective gas, and the raw materials of various metals are put into the crucible from top to bottom according to the melting point, and the Sn metal is at the bottom, which can effectively avoid the volatilization of raw materials during smelting; The material alloy is remelted-solidified-remelted-solidified 3 to 4 times, and...

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Abstract

The invention relates to the technical field of brazing, in particular to Hf-containing multi-element boron-free nickel-based alloy brazing filler metal, and a preparation method and a brazing method of the Hf-containing multi-element boron-free nickel-based alloy brazing filler metal. The Hf-containing multi-element boron-free nickel-based alloy brazing filler metal comprises a NiCrSiCuSn alloy phase and a reinforcing phase Hf, the alloy brazing filler metal is prepared from the following components in percentage by mass: 51.0%-55.0% of Ni, 12.0%-15.0% of Cr, 3.0%-5.0% of Si, 16.0%-20.0% of Cu, 3.0%-5.0% of Sn and 0-4% of Hf, the alloy brazing filler metal is obtained through vacuum arc melting, a B element is removed, and the toughness of the brazing filler metal is greatly improved; and a small amount of Hf element is added, when the brazing temperature is not increased, the problems of thermal damage such as graphitization and hot cracks are solved, generation of brittle phases is reduced, the holding force of the brazing filler metal to diamond is improved, the strength and hardness of a connector are improved, and the mechanical property of the connector is guaranteed.

Description

technical field [0001] The invention relates to the technical field of brazing, in particular to a multi-element boron-free nickel-based alloy brazing filler metal containing Hf, a preparation method and a brazing method thereof. Background technique [0002] Compared with traditional diamond tools, single-layer brazed diamond tools have many advantages such as strong diamond abrasive grain fixation, high cutting efficiency, large chip space, and long service life, so they are often used in the processing of hard and brittle materials. However, there are still some shortcomings. Due to the high brazing temperature during the manufacture of brazed diamond tools, the thermal damage of diamond particles is relatively large, resulting in a decrease in their strength. During the heavy-duty grinding process, these diamond particles with large thermal damage are broken. , breaking, or even falling off as a whole is relatively more likely. [0003] At present, the commonly used act...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/40B23K1/00B23K1/008B23K1/20
CPCB23K35/304B23K35/40B23K1/0004B23K1/008B23K1/206B23K1/20
Inventor 徐东崔冰丁梓超左如忠张晖李维火傅玉灿孙华为张雷程战
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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