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A kind of composite ceramic tool material and preparation method thereof

A cutting tool material and composite ceramic technology, applied in the field of ceramic cutting tool materials, can solve the problems of unsatisfactory composite material performance, high manufacturing cost, and many raw material components, and achieve the effects of reducing preparation time, reducing production cost, and excellent cutting performance

Active Publication Date: 2019-01-08
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The above methods have problems such as long sintering time, high energy consumption, high sintering pressure, complex equipment, high manufacturing cost, many raw material components, complex process, and unsatisfactory performance of composite materials.

Method used

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  • A kind of composite ceramic tool material and preparation method thereof
  • A kind of composite ceramic tool material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A kind of composite ceramic tool material, containing composition and its volume percentage is Al 2 o 3 : 85%, ZrO 2 : 10%, cBN: 5%.

[0043] The preparation method of above-mentioned composite ceramic cutter material comprises the following steps:

[0044] Step 1, prepare raw material powder:

[0045] According to the composition of composite ceramic tool material, weigh Al 2 o 3 Powder, Y 2 o 3 Stable ZrO 2 powder and cBN powder; among them, Al 2 o 3 Powder particle size is 0.08~0.15μm; Y 2 o 3 Stable ZrO 2 The particle size of powder is 0.02~0.08μm; the particle size of cBN powder is 1~2um;

[0046] Step 2, configure the dispersant solution:

[0047] Dissolve ammonium citrate and ammonium polyacrylate in water to make a dispersant solution; wherein: ammonium citrate accounts for 0.20% of the mass sum of the powder, and ammonium polyacrylate accounts for 0.05% of the mass sum of the powder; the volume of water is selected according to the preparation ste...

Embodiment 2

[0055] A kind of composite ceramic tool material, containing composition and its volume percentage is Al 2 o 3 : 80%, ZrO 2 : 10%, cBN: 10%.

[0056] The preparation method of above-mentioned composite ceramic cutter material comprises the following steps:

[0057] Step 1, prepare raw material powder:

[0058] According to the composition of composite ceramic tool material, weigh Al 2 o 3 Powder, Y 2 o 3 Stable ZrO 2 powder and cBN powder; among them, Al 2 o 3 Powder particle size is 0.08~0.15μm; Y 2 o 3 Stable ZrO 2 The particle size of powder is 0.02~0.08μm; the particle size of cBN powder is 2~3μm;

[0059] Step 2, configure the dispersant solution:

[0060] Dissolve ammonium citrate and ammonium polyacrylate in water to make a dispersant solution; wherein: ammonium citrate accounts for 0.50% of the mass sum of the powder, and ammonium polyacrylate accounts for 0.15% of the mass sum of the powder; the volume of water is selected according to the preparation st...

Embodiment 3

[0068] A kind of composite ceramic tool material, containing composition and its volume percentage is Al 2 o 3 : 80%, ZrO 2 : 15%, cBN: 5%.

[0069] The preparation method of above-mentioned composite ceramic cutter material comprises the following steps:

[0070] Step 1, prepare raw material powder:

[0071] According to the composition of composite ceramic tool material, weigh Al 2 o 3 Powder, Y 2 o 3 Stable ZrO 2 powder and cBN powder; among them, Al 2 o 3 Powder particle size is 0.08~0.15μm; Y 2 o 3 Stable ZrO 2 The particle size of powder is 0.02~0.08μm; the particle size of cBN powder is 3~5μm;

[0072] Step 2, configure the dispersant solution:

[0073] Ammonium polyacrylate is dissolved in water to make a dispersant solution; wherein: ammonium polyacrylate accounts for 0.70% of the mass sum of the powder; the volume of water is selected according to the calculation of 20% of the solid content of the powder weighed in the preparation step 1.

[0074] Step...

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Abstract

A composite ceramic tool material and its preparation method. The material contains components and volume percentages: Al2O3: 80-90%, ZrO2: 5-15%, cBN: 3-10%, and the sum of the three volume percentages is 100%; method : 1) Prepare Al2O3 powder, ZrO2 powder and cBN powder; 2) Dissolve ammonium citrate and / or ammonium polyacrylate in water to make a dispersant solution; 3) Mix Al2O3 powder, ZrO2 powder, cBN powder and dispersant The solution is ball milled and mixed, and then dried to obtain a mixed powder; 4) The mixed powder is hot-pressed and sintered in a vacuum or inert gas atmosphere to prepare an Al2O3-ZrO2-cBN composite ceramic tool material. The method of the invention adds ZrO2 and cBN to play a toughening role; adding a small amount of cBN avoids the high temperature and high pressure conditions required for sintering; through the selection of the dispersant, the problem of agglomeration of nano-sized powders during the mixing process is solved; in the prepared materials All zirconium oxides are in the tetragonal phase, while boron nitride remains in the cubic phase.

Description

technical field [0001] The invention belongs to the technical field of ceramic cutter materials, and in particular relates to a composite ceramic cutter material and a preparation process thereof. Background technique [0002] In recent years, the proportion of cutting tool materials such as ceramics and cubic boron nitride is increasing year by year. This is because high-speed steel, cemented carbide and other cutting tools cannot meet the processing requirements of hardened steel, high-temperature alloy and other difficult-to-machine materials; on the other hand , Ceramic tools and cubic boron nitride have excellent high temperature hardness and chemical stability, which makes them have unique advantages in cutting. [0003] al 2 o 3 Has excellent room temperature and high temperature hardness, wear resistance and oxidation resistance, making Al 2 o 3 Become one of the most widely used ceramic tool materials. However, the low fracture toughness makes it prone to chipp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/622
CPCC04B35/10C04B35/622C04B2235/3225C04B2235/3246C04B2235/386C04B2235/656C04B2235/658C04B2235/6581C04B2235/77C04B2235/96
Inventor 孙旭东张梦雯修稚萌李继光李晓东霍地张牧刘绍宏朱琦
Owner NORTHEASTERN UNIV LIAONING
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