CN104402420A - High toughness ceramic material for cutting tools and preparation method thereof - Google Patents

Abstract

The invention relates to a high toughness ceramic material for cutting tools. The high toughness ceramic material is prepared from the following raw materials by weight part: 2-3 of glycerol, 5-6 of diethylene glycol, 20-25 of silicon nitride, 3-5 of Y2O3, 18-22 of spodumene, 7-9 of eucryptite, 3-5 of lithium carbonate, 0.5-0.7 of rhodium oxide, 34-37 of ZrO2, 1-2 of zinc phosphate, 50-58 of mullite, a proper amount of deionized water, a proper amount of ethanol, 1.7-2 of polyethylene glycol, and 3-4 of a wear-resistant additive. The ceramic provided by the invention is added with rhodium oxide, so that the ceramic has increased toughness, is easy to shape and is not easy to break. By adding zinc phosphate and mullite, the wear resistance of the ceramic is increased, the ceramic can be suitable for making cutting tools, and the cost is low. By using the wear-resistant additive involved in the invention, surface smoothness, wear resistance and heat resistance of the ceramic can be increased.

Description

A kind of high tenacity cutting tool stupalith and preparation method thereof

Technical field

The present invention relates to ceramic cutting tool material field, particularly relate to a kind of high tenacity cutting tool stupalith and preparation method thereof.

Background technology

Along with the development of new and high technology, mechanical industry proposes the more strict and requirement of harshness to cutter material, the higher material of workhardness, stock-removing efficiency that needs are higher, working accuracy is needed now also to require high, this just requires the performance improving cutter, the cutting material hardness such as traditional rapid steel are inadequate, and waste the resources such as rare molybdenum, nickel, therefore sintex arises at the historic moment.Ceramic cutting-tool has possessed 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 still there is the shortcomings such as frangible, poor radiation, heat-shock resistance are poor, abrasion resistance is limited, need to improve, need constantly to reduce production cost simultaneously, realize enterprise's maximum benefit, promote scientific-technical progress.

Summary of the invention

The object of the present invention is to provide a kind of high tenacity cutting tool stupalith and preparation method thereof, the good toughness of this pottery, is easy to moulding, and not easily broken, wear resistance is good.

Technical scheme of the present invention is as follows:

A kind of high tenacity cutting tool stupalith, is characterized in that being made up of the raw material of following weight part: glycerol 2-3, Diethylene Glycol 5-6, silicon nitride 20-25, Y2O3 3-5, triphane 18-22, eucryptite 7-9, Quilonum Retard 3-5, rhodium sesquioxide 0.5-0.7, ZrO2 34-37, zinc phosphate 1-2, mullite 50-58, deionized water are appropriate, appropriate amount of ethanol, polyoxyethylene glycol 1.7-2, antiwear assistant 3-4;

Described antiwear assistant is made up of the raw material of following weight part: silicon nitride 1-1.4, aluminium nitride 1-1.4, titanium nitride 1-1.3, carbonitride 0.4-0.7, zirconium white 1-2, bortz powder 1-2, hafnia 0.3-0.4, silane coupling agent kh-550 1-2, nitrogenize silver 0.7-0.9, silicon carbide 1-2, polyacrylic ester 0.4-0.6, ethanol 6-9, water 7-11; Preparation method is: ethanol, polyacrylic ester, silane coupling agent kh-550 are added to the water, stir, then add zirconium white, silicon carbide, be heated to 70-80 DEG C, stirring reaction 20-30 minute, then add other remaining components, stir 10-20 minute, ultrasonic disperse 6-8 minute, filter, dry, pulverize, cross 40 mesh sieves, under nitrogen atmosphere, at 1380-1440 DEG C, calcine 30-40 minute, pulverize, cross 40 mesh sieves, to obtain final product.

The preparation method of described high tenacity cutting tool stupalith, is characterized in that comprising the following steps:

(1) by triphane, eucryptite, ZrO2, mullite mixing, ball milling, crosses 325 mesh sieves, obtains particle;

(2) by silicon nitride, Y2O3, Quilonum Retard, rhodium sesquioxide mixing, ball milling, crosses 300 mesh sieves, obtains particle;

(3) glycerol, Diethylene Glycol are mixed with the particle that first two steps obtain, add the ethanol of the deionized water of 20-25% weight part, 7-10% weight part, be mixed into pureed, send into ball milling 2-3 in ball mill individual hour, dry, send in calcining furnace, 1-2 hour is calcined at 800-900 DEG C, take out and pulverize, cross 300 mesh sieves, obtain particle;

(4) particle that (3) step obtains is mixed with other remaining components, add the deionized water of 3-4 times of weight part, polyoxyethylene glycol, ball milling 2-3 hour, dry at 110-120 DEG C, cross 40 mesh sieves, hot pressing at 1580-1640 DEG C, hot pressing pressure is 20-30MPa, hot pressing time is 50-60 minute, to obtain final product.

Beneficial effect of the present invention

Pottery of the present invention with the addition of rhodium sesquioxide, adds the toughness of pottery, is easy to moulding, not easily broken; By adding zinc phosphate, mullite, add the wear resistance of pottery, be applicable to make cutting tool, cost is low; The antiwear assistant of the application of the invention, can increase the surface smoothness of pottery, wear resistance and thermotolerance.

Embodiment

A kind of high tenacity cutting tool stupalith, is made up of the raw material of following weight part (kilogram): glycerol 2.5, Diethylene Glycol 5.5, silicon nitride 23, Y2O3 4, triphane 20, eucryptite 8, Quilonum Retard 4, rhodium sesquioxide 0.6, ZrO2 35, zinc phosphate 1.5, mullite 55, deionized water are appropriate, appropriate amount of ethanol, polyoxyethylene glycol 1.8, antiwear assistant 3.5;

Described antiwear assistant is made up of the raw material of following weight part (kilogram): silicon nitride 1.2, aluminium nitride 1.2, titanium nitride 1.2, carbonitride 0.6, zirconium white 1.5, bortz powder 1.5, hafnia 0.3, silane coupling agent kh-550 1.5, nitrogenize silver 0.8, silicon carbide 1.5, polyacrylic ester 0.5, ethanol 7, water 9; Preparation method is: ethanol, polyacrylic ester, silane coupling agent kh-550 are added to the water, stir, then add zirconium white, silicon carbide, be heated to 75 DEG C, stirring reaction 25 minutes, then add other remaining components, stir 15 clocks, ultrasonic disperse 7 minutes, filter, dry, pulverize, cross 40 mesh sieves, under nitrogen atmosphere, calcine 35 minutes at 1420 DEG C, pulverize, cross 40 mesh sieves, to obtain final product.

The preparation method of described high tenacity cutting tool stupalith, comprises the following steps:

(1) by triphane, eucryptite, ZrO2, mullite mixing, ball milling, crosses 325 mesh sieves, obtains particle;

(2) by silicon nitride, Y2O3, Quilonum Retard, rhodium sesquioxide mixing, ball milling, crosses 300 mesh sieves, obtains particle;

(3) glycerol, Diethylene Glycol are mixed with the particle that first two steps obtain, add the ethanol of the deionized water of 23% weight part, 8% weight part, be mixed into pureed, in feeding ball mill, ball milling 2.5 hours, dry, sends in calcining furnace, calcine 1.5 hours at 850 DEG C, take out and pulverize, cross 300 mesh sieves, obtain particle;

(4) particle that (3) step obtains is mixed with other remaining components, add the deionized water of 3 times of weight parts, polyoxyethylene glycol, ball milling 2.6 hours, dry at 114 DEG C, cross 40 mesh sieves, hot pressing at 1620 DEG C, hot pressing pressure is 25MPa, and hot pressing time is 55 minutes, to obtain final product.

Experimental data:

The Vickers' hardness of this embodiment pottery is 99GPa, and bending strength is 1124MPa, and fracture toughness property is 12MPam ^1/2.

Claims (2)

1. a high tenacity cutting tool stupalith, is characterized in that being made up of the raw material of following weight part: glycerol 2-3, Diethylene Glycol 5-6, silicon nitride 20-25, Y2O3 3-5, triphane 18-22, eucryptite 7-9, Quilonum Retard 3-5, rhodium sesquioxide 0.5-0.7, ZrO2 34-37, zinc phosphate 1-2, mullite 50-58, deionized water are appropriate, appropriate amount of ethanol, polyoxyethylene glycol 1.7-2, antiwear assistant 3-4;

Described antiwear assistant is made up of the raw material of following weight part: silicon nitride 1-1.4, aluminium nitride 1-1.4, titanium nitride 1-1.3, carbonitride 0.4-0.7, zirconium white 1-2, bortz powder 1-2, hafnia 0.3-0.4, silane coupling agent kh-550 1-2, nitrogenize silver 0.7-0.9, silicon carbide 1-2, polyacrylic ester 0.4-0.6, ethanol 6-9, water 7-11; Preparation method is: ethanol, polyacrylic ester, silane coupling agent kh-550 are added to the water, stir, then add zirconium white, silicon carbide, be heated to 70-80 DEG C, stirring reaction 20-30 minute, then add other remaining components, stir 10-20 minute, ultrasonic disperse 6-8 minute, filter, dry, pulverize, cross 40 mesh sieves, under nitrogen atmosphere, at 1380-1440 DEG C, calcine 30-40 minute, pulverize, cross 40 mesh sieves, to obtain final product.

2. the preparation method of high tenacity cutting tool stupalith according to claim 1, is characterized in that comprising the following steps:

(1) by triphane, eucryptite, ZrO2, mullite mixing, ball milling, crosses 325 mesh sieves, obtains particle;

(2) by silicon nitride, Y2O3, Quilonum Retard, rhodium sesquioxide mixing, ball milling, crosses 300 mesh sieves, obtains particle;

(3) glycerol, Diethylene Glycol are mixed with the particle that first two steps obtain, add the ethanol of the deionized water of 20-25% weight part, 7-10% weight part, be mixed into pureed, send into ball milling 2-3 in ball mill individual hour, dry, send in calcining furnace, 1-2 hour is calcined at 800-900 DEG C, take out and pulverize, cross 300 mesh sieves, obtain particle;

(4) particle that (3) step obtains is mixed with other remaining components, add the deionized water of 3-4 times of weight part, polyoxyethylene glycol, ball milling 2-3 hour, dry at 110-120 DEG C, cross 40 mesh sieves, hot pressing at 1580-1640 DEG C, hot pressing pressure is 20-30MPa, hot pressing time is 50-60 minute, to obtain final product.