CN104387041A - Aluminum oxide ceramic for self-lubricated cutter and preparation method of aluminum oxide ceramic - Google Patents

Abstract

The invention discloses aluminum oxide ceramic for a self-lubricated cutter. The aluminum oxide ceramic is prepared from the following raw materials in parts by weight: 2-3 parts of kibushi-clay, 3-4 parts of flint clay, 3-5 parts of glass powder, 76-82 parts of rod-like aluminum oxide granules, 3-4 parts of crystalline flake graphite, 1-1.5 parts of sodium peroxide, 5-8 parts of silicon carbide, 0.5-0.7 part of molybdenum powder, 0.4-0.7 part of nickel powder, a proper amount of ethanol, 0.4-0.7 part of a silane coupling agent kh550, a proper amount of deionized water, 1-1.5 parts of polyacrylic acid, 1.2-1.6 parts of polyethylene glycol and 4-5 parts of an anti-wearing additive. Due to adoption of the rod-like aluminum oxide granules and the crystalline flake graphite, the ceramic is good in lubrication property, good in heat radiation property, very good in toughness and is a high-quality material of a cutting tool, and workpieces are not easy to damage when cut; due to adoption of the anti-wearing additive, the wearing resistance and the heat resistance of the ceramic are improved.

Description

A kind of self lubricity cutting tool alumina-ceramic and preparation method thereof

Technical field

The present invention relates to ceramic cutting tool material field, particularly relate to a kind of self lubricity cutting tool alumina-ceramic and preparation method thereof.

Background technology

Current cutting steel, cast iron, alloy steel products and stainless steel etc. generally adopt the Wimet (WC-Co, WC-TiC-Co) of carbide base.The diamond and cubic boron nitride (CBN) that hardness is the highest is also adopted for some exotic materials, but their strength ratio Wimet is lower, and diamond tool is unfavorable for Cutting Steel iron material because the diamond of carbonaceous element easily and ferro element react and generate iron carbide, and make diamond loss.And sintex is to a lot of material all Fails To Responds such as iron-baseds, to processing cold hard cast-iron, stellite, Chlorimet etc., there is good performance.

Current Stupalox has much excellent performance, there is high rigidity, high-density, high temperature resistant, the features such as diamagneticization, anti-oxidant, erosion resistance is strong, chemical stability is good, high-wearing feature, but these ceramic costs are higher, kind is few, also need the stupalith that further research is new, reduce costs, improve the toughness of sintex, thermal diffusivity, bend resistance, the use properties such as wear-resistant simultaneously.

Summary of the invention

The object of the present invention is to provide a kind of self lubricity cutting tool alumina-ceramic and preparation method thereof, this Ceramic lubricacion is good, and not easily disfiguring workpiece during cutting, thermal diffusivity is good, and has good toughness, is the material of cutting tool high-quality.

Technical scheme of the present invention is as follows:

A kind of self lubricity cutting tool alumina-ceramic, is characterized in that being made up of the raw material of following weight part: kieselguhr 2-3, flint clay 3-4, glass powder 3-5, rod-like aluminum oxide particle 76-82, crystalline flake graphite 3-4, sodium peroxide 1-1.5, silicon carbide 5-8, molybdenum powder 0.5-0.7, nickel powder 0.4-0.7, appropriate amount of ethanol, silane coupling agent kh-550 0.4-0.7, deionized water are appropriate, polyacrylic acid 1-1.5, polyoxyethylene glycol 1.2-1.6, wear-resistant auxiliary agent 4-5;

Described wear-resistant auxiliary agent is made up of the raw material of following weight part: lanthanum trioxide 0.2-0.3, nano zircite 0.6-0.9, yttrium oxide 0.4-0.5, nano aluminium oxide 0.3-0.5, acetic acid 5-7, Yttrium trinitrate 0.3-0.5, zirconium oxychloride 3-3.5,1-2% hydrochloric acid soln is appropriate, water is appropriate, preparation method is: by Yttrium trinitrate, zirconium oxychloride adds in the water of 24-30 weight part, acetic acid is dripped after stirring and dissolving, magnetic agitation 4-5 hour, add nano zircite, nano aluminium oxide, continue to stir 2-3 hour, be placed in 1-2 days under room temperature, add yttrium oxide while stirring again, lanthanum trioxide, stir 2-3 hour, drying is stirred in 120-130 DEG C of oil bath, send into calcining furnace, in nitrogen atmosphere, 50-60 minute is calcined at 1200-1500 DEG C, the 1-2% hydrochloric acid soln adding 2-3 times of weight part washs 2-3 time, be washed to neutrality, dry, pulverize, cross 100 mesh sieves, obtain.

The preparation method of described self lubricity cutting tool alumina-ceramic, is characterized in that comprising the following steps:

(1) by ball milling after kieselguhr, flint clay, molybdenum powder, nickel powder mixing, cross 250 mesh sieves, add the deionized water of 4-5 times of weight part, add silane coupling agent kh-550 after stirring, be heated to 70-80 DEG C, stir 10-15 minute, add sodium peroxide, crystalline flake graphite again, continue to stir 30-40 minute, spraying dry, obtain particle, then send in calcining furnace, in nitrogen atmosphere, 40-50 minute is calcined at 700-800 DEG C, pulverize, cross 100 mesh sieves, obtain particle;

(2) by glass powder, rod-like aluminum oxide particle, silicon carbide mixing, add the ethanol of 0.8-1 times of weight part, be milled to below 200 orders, dry, obtain particle;

(3) particle first two steps obtained mixes with other remaining components except polyacrylic acid, polyoxyethylene glycol, get the deionized water of 3-4 times of weight part of mixing material, add polyacrylic acid, polyoxyethylene glycol, stir, add mixing material, ball milling 1-2 hour, ultrasonic disperse 13-17 minute, dry at 110-120 DEG C, cross 40 mesh sieves, obtain particle;

(4) particle (3) step obtained is in nitrogen atmosphere, and hot pressing at 1610-1670 DEG C, hot pressing pressure is 25-30MPa, and hot pressing time is 40-50 minute, and naturally cooling, to obtain final product.

Beneficial effect of the present invention

Pottery of the present invention employs rod-like aluminum oxide particle, crystalline flake graphite, makes Ceramic lubricacion good, not easily disfiguring workpiece during cutting, and thermal diffusivity is good, and has good toughness, is the material of cutting tool high-quality; The wear-resistant auxiliary agent of the application of the invention, can increase wear resistance and the thermotolerance of pottery.

Embodiment

A kind of self lubricity cutting tool alumina-ceramic, is made up of the raw material of following weight part (kilogram): kieselguhr 2.5, flint clay 3.5, glass powder 4, rod-like aluminum oxide particle 79, crystalline flake graphite 3.5, sodium peroxide 1.3, silicon carbide 6, molybdenum powder 0.6, nickel powder 0.6, appropriate amount of ethanol, silane coupling agent kh-550 0.6, deionized water are appropriate, polyacrylic acid 1.3, polyoxyethylene glycol 1.4, wear-resistant auxiliary agent 4.5;

Described wear-resistant auxiliary agent is made up of the raw material of following weight part (kilogram): lanthanum trioxide 0.2, nano zircite 0.8, yttrium oxide 0.4, nano aluminium oxide 0.4, acetic acid 6, Yttrium trinitrate 0.4, zirconium oxychloride 3.3,1.5% hydrochloric acid soln is appropriate, water is appropriate, preparation method is: by Yttrium trinitrate, zirconium oxychloride adds in the water of 27 weight parts, acetic acid is dripped after stirring and dissolving, magnetic agitation 4.5 hours, add nano zircite, nano aluminium oxide, continue stirring 2.5 hours, be placed in room temperature lower 1.5 days, add yttrium oxide while stirring again, lanthanum trioxide, stir 2.5 hours, drying is stirred in 125 DEG C of oil baths, send into calcining furnace, in nitrogen atmosphere, calcine 55 minutes at 1400 DEG C, 1.5% hydrochloric acid soln adding 2.5 times of weight parts washs 3 times, be washed to neutrality, dry, pulverize, cross 100 mesh sieves, obtain.

The preparation method of described self lubricity cutting tool alumina-ceramic, comprises the following steps:

(1) by ball milling after kieselguhr, flint clay, molybdenum powder, nickel powder mixing, cross 250 mesh sieves, add the deionized water of 4.5 times of weight parts, add silane coupling agent kh-550 after stirring, be heated to 75 DEG C, stir 13 minutes, add sodium peroxide, crystalline flake graphite again, continue stirring 35 minutes, spraying dry, obtain particle, then send in calcining furnace, in nitrogen atmosphere, calcine 45 minutes at 750 DEG C, pulverize, cross 100 mesh sieves, obtain particle;

(2) by glass powder, rod-like aluminum oxide particle, silicon carbide mixing, add the ethanol of 0.9 times of weight part, be milled to below 200 orders, dry, obtain particle;

(3) particle first two steps obtained mixes with other remaining components except polyacrylic acid, polyoxyethylene glycol, get the deionized water of 3.5 times of weight parts of mixing material, add polyacrylic acid, polyoxyethylene glycol, stir, add mixing material, ball milling 1.5 hours, ultrasonic disperse 15 minutes, dry at 115 DEG C, cross 40 mesh sieves, obtain particle;

(4) particle (3) step obtained is in nitrogen atmosphere, and hot pressing at 1650 DEG C, hot pressing pressure is 28MPa, and hot pressing time is 45 minutes, and naturally cooling, to obtain final product.

Experimental data:

The Vickers' hardness of this embodiment pottery is 95GPa, and bending strength is 1003MPa, and fracture toughness property is 11MPam ^1/2.

Claims (2)

1. a self lubricity cutting tool alumina-ceramic, is characterized in that being made up of the raw material of following weight part: kieselguhr 2-3, flint clay 3-4, glass powder 3-5, rod-like aluminum oxide particle 76-82, crystalline flake graphite 3-4, sodium peroxide 1-1.5, silicon carbide 5-8, molybdenum powder 0.5-0.7, nickel powder 0.4-0.7, appropriate amount of ethanol, silane coupling agent kh-550 0.4-0.7, deionized water are appropriate, polyacrylic acid 1-1.5, polyoxyethylene glycol 1.2-1.6, wear-resistant auxiliary agent 4-5;

Described wear-resistant auxiliary agent is made up of the raw material of following weight part: lanthanum trioxide 0.2-0.3, nano zircite 0.6-0.9, yttrium oxide 0.4-0.5, nano aluminium oxide 0.3-0.5, acetic acid 5-7, Yttrium trinitrate 0.3-0.5, zirconium oxychloride 3-3.5,1-2% hydrochloric acid soln is appropriate, water is appropriate, preparation method is: by Yttrium trinitrate, zirconium oxychloride adds in the water of 24-30 weight part, acetic acid is dripped after stirring and dissolving, magnetic agitation 4-5 hour, add nano zircite, nano aluminium oxide, continue to stir 2-3 hour, be placed in 1-2 days under room temperature, add yttrium oxide while stirring again, lanthanum trioxide, stir 2-3 hour, drying is stirred in 120-130 DEG C of oil bath, send into calcining furnace, in nitrogen atmosphere, 50-60 minute is calcined at 1200-1500 DEG C, the 1-2% hydrochloric acid soln adding 2-3 times of weight part washs 2-3 time, be washed to neutrality, dry, pulverize, cross 100 mesh sieves, obtain.

2. the preparation method of self lubricity cutting tool alumina-ceramic according to claim 1, is characterized in that comprising the following steps:

(1) by ball milling after kieselguhr, flint clay, molybdenum powder, nickel powder mixing, cross 250 mesh sieves, add the deionized water of 4-5 times of weight part, add silane coupling agent kh-550 after stirring, be heated to 70-80 DEG C, stir 10-15 minute, add sodium peroxide, crystalline flake graphite again, continue to stir 30-40 minute, spraying dry, obtain particle, then send in calcining furnace, in nitrogen atmosphere, 40-50 minute is calcined at 700-800 DEG C, pulverize, cross 100 mesh sieves, obtain particle;

(2) by glass powder, rod-like aluminum oxide particle, silicon carbide mixing, add the ethanol of 0.8-1 times of weight part, be milled to below 200 orders, dry, obtain particle;

(3) particle first two steps obtained mixes with other remaining components except polyacrylic acid, polyoxyethylene glycol, get the deionized water of 3-4 times of weight part of mixing material, add polyacrylic acid, polyoxyethylene glycol, stir, add mixing material, ball milling 1-2 hour, ultrasonic disperse 13-17 minute, dry at 110-120 DEG C, cross 40 mesh sieves, obtain particle;

(4) particle (3) step obtained is in nitrogen atmosphere, and hot pressing at 1610-1670 DEG C, hot pressing pressure is 25-30MPa, and hot pressing time is 40-50 minute, and naturally cooling, to obtain final product.