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A high-entropy alloy sintered diamond nodule

A technology of diamond nodules and high entropy alloys, which is applied in the field of manufacturing of sintered diamond nodules and can solve problems such as life limitation

Active Publication Date: 2018-09-21
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, single-layer brazed diamond tools have only one layer of abrasive grains, which limits their life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] 1. A method for making a high-entropy alloy sintered diamond block, comprising the following process steps:

[0013] (1) The pre-alloyed powder Cu-Sn, Ni-Cr-B-Si, Fe-Cr-B-Si, NaHCO 3 According to a certain mass ratio of 30%: 32%: 35%: 3%, the mass ratio is mixed and ball milled into high-entropy alloy powder, and 4.5mL of aqueous solution containing 10% by weight of polyvinyl alcohol is added to every kilogram of high-entropy alloy powder; The original powder particle size ranges of each pre-alloyed powder are: Cu-Sn: 220-180 μm, Ni-Cr-B-Si: 200-150 μm, Fe-Cr-B-Si: 300-250 μm, NaHCO 3 : 200-150 μm. The Sn content in the Cu-Sn alloy is 40% by mass. Among them, the mass percentages of various elements in Ni-Cr-B-Si are: Cr is 12-18, B is 2.5-4.5, Si is 2.5-4.5, C is 0.7-1, and the rest is Ni. Among them, the mass percentages of various elements in Fe-Cr-B-Si are: Cr is 13-17, B is 2.5-4.5, Si is 2.5-4.5, C is 0.7-1, and the rest is Fe. Steel ball milling jars are used...

Embodiment 2

[0019] 1. A method for making a high-entropy alloy sintered diamond block, comprising the following process steps:

[0020] (1) The pre-alloyed powder Cu-Sn, Ni-Cr-B-Si, Fe-Cr-B-Si, NaHCO 3 According to a certain mass ratio of 32%: 35%: 30%: 3%, ball milling is mixed into a high-entropy alloy powder, and 5 mL of an aqueous solution containing 10% by weight of polyvinyl alcohol is added to every kilogram of high-entropy alloy powder; The original powder particle size ranges of the pre-alloyed powder are: Cu-Sn: 220-180 μm, Ni-Cr-B-Si: 200-150 μm, Fe-Cr-B-Si: 300-250 μm, NaHCO 3 : 200-150 μm. Wherein the mass percentage of Sn content in the Cu-Sn alloy is 45%. Among them, the mass percentages of various elements in Ni-Cr-B-Si are: Cr is 12-18, B is 2.5-4.5, Si is 2.5-4.5, C is 0.7-1, and the rest is Ni. Among them, the mass percentages of various elements in Fe-Cr-B-Si are: Cr is 13-17, B is 2.5-4.5, Si is 2.5-4.5, C is 0.7-1, and the rest is Fe. A steel ball mill was used f...

Embodiment 3

[0026] 1. A method for making a high-entropy alloy sintered diamond block, comprising the following process steps:

[0027] (1) The pre-alloyed powder Cu-Sn, Ni-Cr-B-Si, Fe-Cr-B-Si, NaHCO 3 According to a certain mass ratio of 33%: 33%: 33%: 1%, ball milling is mixed into a high-entropy alloy powder, and 4.5 mL of an aqueous solution containing 10% by weight of polyvinyl alcohol is added to every kilogram of high-entropy alloy powder; The original powder particle size ranges of each pre-alloyed powder are: Cu-Sn: 220-180 μm, Ni-Cr-B-Si: 200-150 μm, Fe-Cr-B-Si: 300-250 μm, NaHCO 3: 200-150 μm. Wherein the mass percentage of the Sn content in the Cu-Sn alloy is 50%. Among them, the mass percentages of various elements in Ni-Cr-B-Si are: Cr is 12-18, B is 2.5-4.5, Si is 2.5-4.5, C is 0.7-1, and the rest is Ni. Among them, the mass percentages of various elements in Fe-Cr-B-Si are: Cr is 13-17, B is 2.5-4.5, Si is 2.5-4.5, C is 0.7-1, and the rest is Fe. A steel ball milling j...

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PUM

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Abstract

The invention discloses a method of manufacturing a diamond segment by prepressing a high-entropy alloy and diamond and then carrying out pressure sintering. The method comprises the following steps: Cu-Sn prealloyed powder, Ni-Cr-B-Si prealloyed powder, Fe-Cr-B-Si prealloyed powder, and NaHCO3 prealloyed powder are subjected to ball-mill mixing for forming high-entropy alloy powder, a given amount of polyvinyl alcohol aqueous solution is added, a mixture and the diamond are subjected to secondary mixing, 1.2-1.5 carats diamond is added to per cubic centimeter of the high-entropy alloy powder, a mixture is prepressed at the pressure of 100-250MPa for forming a blank, finally under argon shielding, the pressure sintering with the sintering temperature being 820-870 DEG C and the pressure being 60-220MPa is carried out in a pressure sintering furnace, heat preservation is carried out for 2-8min, and the sdiamond segment is formed after the sintering.

Description

technical field [0001] The invention belongs to the field of superhard material tool production, in particular to the production of sintered diamond nodules. Background technique [0002] Diamond abrasives have excellent properties of high hardness, good wear resistance, and good thermal conductivity. Therefore, diamond tools have the advantages of long life and high efficiency in processing hard and brittle materials. The production methods of tools include electroplating, sintering, and brazing. Among them, the abrasive grains of the electroplated diamond grinding wheel are easy to fall off from the surface of the tool during processing, resulting in a reduction in processing efficiency and tool life. The single-layer diamond tool made by brazing can form a chemical metallurgical bond between the diamond and the solder. , so it has excellent characteristics such as high abrasive grain bonding strength, high abrasive exposure, long tool life, etc., and is beneficial to envi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C26/00C22C30/04C22C30/02
CPCC22C1/05C22C26/00C22C30/02C22C30/04
Inventor 卢金斌李扬刘威殷振王广勋朱其新张旺玺徐帅马明星李华
Owner SUZHOU UNIV OF SCI & TECH