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Gradient function ceramic cutter material and preparing method thereof

A technology of ceramic tools and gradient function, which is applied to tools for lathes, manufacturing tools, turning equipment, etc., can solve the problems of metal cutting tool materials, etc., and achieve the effect of improving surface quality

Inactive Publication Date: 2003-11-12
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, these gradient functional materials are used as thermal insulation materials in the aerospace field, and cannot be used as metal cutting tool materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: Preparation of Al with 9-layer structure 2 o 3 / TiC Gradient Functional Ceramic Tool Material

[0013] (1) Using wet process to mix materials, prepare 5 kinds of composite powders with different mixing ratios, numbered: 70T, 60T, 50T, 40T and 30T, their TiC and Al 2 o 3 The volume ratios are: 70vol% / 30vol%, 60vol% / 40vol%, 50vol% / 50vol%, 40vol% / 60vol% and 30vol% / 70vol%, and add a small amount of sintering aid Y 2 o 3 and MgO, then dried and sieved;

[0014] (2) according to the mass ratio of 10, 10.1, 10.7, 12.4wt%, take two parts of the composite powder 70T, 60T, 50T, 40T respectively, and weigh one part of the composite powder 30T according to the mass ratio of 13.6wt% for subsequent use;

[0015] (3) In the order of 70T, 60T, 50T, 40T, 30T, 40T, 50T, 60T, 70T, the powder is laminated and filled in the mold and pre-pressed;

[0016] (4) Hot press sintering at a sintering temperature of 1700°C and a pressure of 30MPa, and N 2 Gas protection, keep warm ...

Embodiment 2

[0018] Embodiment 2: Al with 11-layer structure 2 o 3 / TiC Gradient Functional Ceramic Tool Material

[0019] (1) Using wet process to mix materials, prepare 6 kinds of composite powders with different mixing ratios, numbered: 65T, 60T, 55T, 50T, 45T and 40T, their TiC and Al 2 o 3 The volume ratios are: 65vol% / 35vol%, 60vol% / 40vol%, 55vol% / 45vol%, 50vol% / 50vol%, 45vol% / 55vol% and 40vol% / 60vol%, and add a small amount of sintering aid Y 2 o 3 and MgO, then dried and sieved;

[0020] (2) According to the mass ratio of 9.31, 9.21, 9.12, 9.02, 8.93wt%, weigh two parts of the composite powder 65T, 60T, 55T, 50T and 45T respectively, and weigh one part of the composite powder 40T according to the mass ratio of 8.82wt%. ;

[0021] (3) Carry out layered filling and pre-pressing of powder in the mold in the order of 65T, 60T, 55T, 50T, 45T, 40T, 45T, 50T, 55T, 60T and 65T;

[0022] (4) Hot press sintering at a sintering temperature of 1750°C and a pressure of 30MPa, and N 2 Ga...

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PUM

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Abstract

The present invention relates to an Al2O3 / TiC symmetrical gradient-functional ceramic cutter material and its preparation method. Said cutter material has symmetrical double-directional composition distribution structure, and its preparation process has the following steps: adopting wet process to disperse mixed material, respectively preparing Al2O3 / TiC composite powder with different mixing ratio and adding micro sinternig adjuvant, drying and sieving, according to the designed mass ratio weighing composite powders with various different mixing ratios, making layer-by-layer powder lamination and filling, hot-pressing and sintering at 1700-1750 deg.C and 30 MPa, heat-insulating for 10-20 min., then cooling with furnace so as to obtain the invented cutter material with excellent various mechanical properties.

Description

Technical field: [0001] The invention belongs to the fields of mechanical manufacturing and inorganic non-metallic materials, and in particular relates to a gradient functional ceramic cutting tool material and a preparation method thereof. Background technique: [0002] Ceramic knives have the advantages of high hardness, wear resistance, heat resistance and chemical stability, but their brittleness limits their application range, and their strength, thermal conductivity and thermal shock resistance are also low. Therefore, improving its strength, toughness and thermal shock resistance is the key to improving its performance and expanding its application range. Domestic and foreign researchers and tool manufacturers generally use the method of adding toughening and strengthening phases to the ceramic matrix to improve its performance, such as adding TiC, (W, Ti) C, Ti (C, N), TiB 2 , SiC particles or whiskers for particle or whisker toughening and strengthening, or use ZrO...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B27/14C04B35/117C04B35/645
Inventor 赵军艾兴张建华
Owner SHANDONG UNIV
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