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CVD (chemical vapor deposition) diamond brazing nickel-based alloy brazing sheet and preparation method thereof

A nickel-based alloy and diamond technology, which is applied in the field of nickel-based alloy brazing filler metal for CVD diamond brazing and its preparation, can solve the problem that it is difficult to realize the connection between the brazing filler metal and the CVD diamond surface, the Ni-Cr brazing filler metal has a high melting point, and the Ag-based filler metal is difficult to achieve. The problem of high cost of brazing material, to achieve the effect of good plasticity, easy brazing, and improving the strength of the brazing material

Inactive Publication Date: 2013-09-18
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the high cost and low strength of Ag-based solder in the prior art, the high melting point of Ni-Cr solder, poor filling capacity, and the difficulty in realizing the connection between solder and CVD diamond surface by conventional brazing. The problem is to provide a nickel-based alloy solder sheet for CVD diamond brazing and its preparation method. The bonding strength between the solder and CVD diamond is high; the thermal damage to CVD diamond is low, and it is easy to braze; the solder has good plasticity and is easy to braze. processed into flakes

Method used

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  • CVD (chemical vapor deposition) diamond brazing nickel-based alloy brazing sheet and preparation method thereof
  • CVD (chemical vapor deposition) diamond brazing nickel-based alloy brazing sheet and preparation method thereof
  • CVD (chemical vapor deposition) diamond brazing nickel-based alloy brazing sheet and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0018] Weigh the components according to the ratio in Table 1, mix the weighed lanthanum and neodymium metal with 9 times the mass of Sn, and add them to the intermediate frequency induction melting furnace, set the temperature in the intermediate frequency induction melting furnace to 600 ° C, vacuum The degree is 1×10 -2 Pa, after heating for 30 minutes, the master alloy was prepared; put all the remaining raw materials in Table 1 into a non-consumable vacuum electric arc furnace, then add the above-mentioned master alloy, and set the temperature in the non-consumable vacuum electric arc furnace to 1700°C , after all the raw materials are melted into a melt, stir 3 times, each stirring time is 2min, then keep warm at 1700°C, stop heating after 25min, let the melt cool naturally with the furnace; wait for the melt to cool down to 1250°C Finally, use a vacuum pouring machine to pour the cooled melt into a graphite mold, and take it out after cooling to below 150°C to obtain a ...

Embodiment 2

[0022] Weigh the components according to the ratio in Table 2, mix the weighed lanthanum and neodymium metal with 9 times the mass of Sn, and add them to the intermediate frequency induction melting furnace, set the temperature in the intermediate frequency induction melting furnace to 500 ° C, vacuum The degree is 1×10 -3 Pa, master alloy was prepared after heating for 40 minutes; put all the remaining raw materials in Table 1 into a non-consumable vacuum electric arc furnace, then add the above-mentioned master alloy, and set the temperature in the non-consumable vacuum electric arc furnace to 1800°C , after all the raw materials are melted into a melt, stir 3 times, each stirring time is 1.5min, then keep warm at 1800°C, stop heating after 20min, let the melt cool naturally with the furnace; wait until the melt cools to 1200 After ℃, use a vacuum pouring machine to pour the cooled melt into a graphite mold, and take it out after cooling below 150°C to obtain a brazing alloy...

Embodiment 3

[0026] Weigh the components according to the ratio in Table 3, mix the weighed lanthanum and neodymium metal with 9 times the mass of Sn, and add them to the intermediate frequency induction melting furnace, set the temperature in the intermediate frequency induction melting furnace to 650 ° C, vacuum The degree is 5×10 -3 Pa, after heating for 20 minutes, the master alloy was prepared; put all the remaining raw materials in Table 1 into the non-consumable vacuum electric arc furnace, then add the above-mentioned master alloy, and set the temperature in the non-consumable vacuum electric arc furnace to 1600°C , after all the raw materials are melted into a melt, stir 4 times, each stirring time is 1min, then keep warm at 1600°C, stop heating after 30min, let the melt cool down naturally with the furnace; wait for the melt to cool down to 1300°C Finally, use a vacuum pouring machine to pour the cooled melt into a graphite mold, and take it out after cooling to below 150°C to ob...

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Abstract

The invention discloses a CVD (chemical vapor deposition) diamond brazing nickel-based alloy brazing sheet and a preparation method thereof. The CVD diamond brazing nickel-based alloy brazing sheet comprises the following components in weight percentage: 8.0-12% of Cr, 2.5-4.0% of Si, 1.5-2.0% of B, 7.8-11% of Sn, 0.4-1.0% of Ag, 0.1-1.0% of lanthanum neodymium, not more than 0.05% of impurities and the balance of Ni. The CVD diamond brazing nickel-based alloy brazing sheet overcomes the defects that the conventional Ag-based brazing material is high in cost and low in strength; the CVD diamond brazing nickel-based alloy brazing sheet contains Sn, so that the problems that the conventional Ni-Cr brazing material is high in melting point and poor in filling ability are solved; when the prepared nickel-based alloy brazing sheet is used for brazing a CVD diamond, the CVD diamond and the brazing sheet can form a chromium carbide compound, so that the bonding strength between the CVD diamond and the brazing sheet is high; the melting point of the brazing sheet is relatively low, so that heat damage to the CVD diamond is relatively small and the brazing sheet is easy to braze.

Description

technical field [0001] The invention relates to the technical field of diamond brazing, in particular to a nickel-based alloy brazing material sheet for CVD diamond brazing and a preparation method thereof. Background technique [0002] CVD diamond (Chemical Vapor Deposition Diamond) tools have extremely high hardness and wear resistance, low friction coefficient, high elastic modulus, high thermal conductivity, and low thermal expansion coefficient. Diamond has low affinity with non-ferrous metals and the cutting edge is very sharp, with small edge roughness, low friction coefficient, good adhesion resistance, not easy to stick to the knife during cutting, and good surface quality. ideal material. CVD diamond tools are used as tool materials, and CVD diamond is brazed to the tool body. [0003] Due to the stable chemical structure of CVD diamond and high interface energy with other metals, under conventional brazing conditions, the surface of CVD diamond is hardly wetted ...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/40
Inventor 闫焉服高志廷陈新芳李帅纠永涛
Owner HENAN UNIV OF SCI & TECH
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