CN102815946A - Cubic boron nitride (CBN) ceramic high speed grinding wheel and preparation method and application - Google Patents
Cubic boron nitride (CBN) ceramic high speed grinding wheel and preparation method and application Download PDFInfo
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- CN102815946A CN102815946A CN201110153477XA CN201110153477A CN102815946A CN 102815946 A CN102815946 A CN 102815946A CN 201110153477X A CN201110153477X A CN 201110153477XA CN 201110153477 A CN201110153477 A CN 201110153477A CN 102815946 A CN102815946 A CN 102815946A
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Abstract
The invention discloses a cubic boron nitride (CBN) ceramic high speed grinding wheel which comprises a steel substrate and a working abrasive layer. The working abrasive layer comprises an abrasive layer and a middle transition layer. The abrasive layer comprises the following materials: low temperature binding agent, white corundum, ceramic floating bead and CBN. The middle transition layer comprises the following materials: low temperature binding agent and 150-mesh ceramic balls. The low temperature binding agent includes the following materials by volume: 8-12 parts of nanoscale aluminum oxide, 8-12 parts of nanoscale silica and 75-85 parts of premelting ceramic powder. The premelting ceramic powder includes the following materials by volume: 25-35 parts of aluminum oxide, 27-37 parts of silica, 4.5-5.5 parts of sodium oxide, 1.5-2.5 parts of potassium oxide, 1.5-2.5 parts of magnesium oxide, 0.8 part to 1.2 parts of calcium oxide and 5-11 parts of diboron trioxide. The CBN ceramic high speed grinding wheel has the advantages that firing temperature of the ceramic binding agent is 750 DEG C, rupture strength can reach 115MPa, and the CBN strength is basically not lost under the temperature, so that cutting performance of the CBN grinding wheel is greatly improved. A preparation method and the application of the CBN ceramic high speed grinding wheel are further provided.
Description
Technical field
The present invention relates to the mechanical means field, is the ceramic high speed grinding wheel of a kind of CBN (cubic boron nitride) specifically, and a kind of CBN pottery high speed grinding wheel and preparation method who is used for the high-speed grinding of energy-conservation high-grade automobile crane connecting rod neck more specifically says so.
Background technology
Because rise of the oil price, material cost rising, appreciation of the RMB and country are to influence of various factors such as the various preferential policies of energy-saving automobile, market is increasingly high to the cry of environmental protection, energy-conservation new power vehicle.This just requires the performance of motor car engine more and more better; The measure of precision of processing as the camshaft bent axle of mover important spare part directly influences the engine energy-saving effect; Domestic at present for also not having forming technique in this respect, press for to develop a kind of precision sizing high speed CBN emery wheel that is used for high-grade energy-saving engine bent axle.
The CBN vitrified grinding wheel mainly is made up of steel matrix and work abrasive material two portions; Work abrasive material staple is ceramic bond and CBN; Traditional C BN ceramic bond firing temperature is generally 900__950 ℃; Folding strength is generally 75MPa, and the CBN loss of strength about 10% under this temperature, and the passivation of CBN abrasive material wedge angle.Ceramic bond intensity is big more, and the crushing cycle is long more, and the life-span is high more.CBN wedge angle and intensity influence the emery wheel stock-removing efficiency.
Summary of the invention
For improving the emery wheel overall performance, the present invention provides a kind of low-temp ceramics wedding agent CBN high speed grinding wheel, and the ceramic bond firing temperature is 750 ℃; But folding strength can reach 115MPa; CBN intensity is not lost basically under this temperature, and it is clearly demarcated to cut corner angle, has improved CBN emery wheel cutting ability greatly.Concrete scheme is following:
A kind of CBN pottery high speed grinding wheel comprises steel matrix and work abrasive material, and said work abrasive material comprises abrasive material and intermediate layer, and the material of said abrasive material is by volume: low-temperature binder 33-37, and white fused alumina 7-9, pottery float pearl 6-8, CBN45-55; The material of said intermediate layer is by volume:: low-temperature binder 30-40,150 order Ceramic Balls 55-75; The material of said low-temperature binder is by volume: nano level aluminium sesquioxide 8-12, nanometer grade silica 8-12, fritting ceramics powder 75-85; The material of said fritting ceramics powder is by volume:: aluminium sesquioxide 25-35, silicon-dioxide 27-37, sodium oxide 4.5-5.5, potassium oxide 1.5-2.5, Natural manganese dioxide 1.5-2.5, quicklime 0.8-1.2, boron trioxide 5-11;
1350 ℃ of said 150 order Ceramic Balls heatproofs;
The present invention also discloses a kind of preparation method of said CBN pottery high speed grinding wheel, prepares as follows:
One, low-temperature binder preparation
(1) preparation of fritting ceramics powder:
By material be by volume:: aluminium sesquioxide 25-35, silicon-dioxide 27-37, sodium oxide 4.5-5.5; Potassium oxide 1.5-2.5, Natural manganese dioxide 1.5-2.5, quicklime 0.8-1.2; Boron trioxide 5-11 with raw materials mix after; Burn till through the insulation in 2 hours of 1600 degree, water-cooled, fragmentation, 240 standard sieves, undersize powder, oven dry excessively make the fritting ceramics powder again;
(2) preparation of low-temperature binder:
By material be by volume:: nano level aluminium sesquioxide 8-12, nanometer grade silica 8-12, fritting ceramics powder 75-85, raw materials mix is even through ball mill mixing, and resulting product is a low-temperature binder;
Two, the preparation of work abrasive material:
Take by weighing the abrasive material material by volume: low-temperature binder 33-37, white fused alumina 7-9, pottery float pearl 6-8; CBN45-55; Take by weighing the middle transition layer material by volume: low-temperature binder 30-40,150 order Ceramic Balls 55-75, be arranged on matrix on by universal method above-mentioned materials after; Temperature curve sintering by setting makes finished product; Said temperature curve is: 20 ℃ were warming up to 150 ℃ through 2 hours, were warming up to 500 ℃ through 3 hours again, were warming up to 750 ℃ through 3 hours again, last 750 ℃ of insulations 6 hours; In sintering process, adopt protection of inert gas;
The present invention also discloses a kind of application of said CBN pottery high speed grinding wheel: said CBN pottery high speed grinding wheel is applied to processing automobile engine crankshaft connecting rod neck.
The characteristics of material prescription of the present invention:
A, wedding agent firing temperature are low, and folding strength is high, and is good to abrasive material cohesiveness;
The adding of B, high temperature fritting pottery has reduced the wedding agent firing temperature, and has improved the wettability of wedding agent to abrasive material;
Add an amount of diamond in C, the CBN pottery working lining, can improve abrasive grain cutting efficient to a certain extent, and can reduce cost;
The introducing of D, nano material has improved parcel ability, intensity, the sintering temperature of wedding agent to abrasive material greatly.
The material that mixes is added the Vilaterm aqueous solution, be pressed into solid shape, dry laggard High Temperature Furnaces Heating Apparatus sintering.
Preparing method's of the present invention process characteristic:
A, ceramic working lining sintering temperature are pressed the specified temp curve; According to ceramic product high temperature sintering singularity; The invention discloses the sintering temperature curve that is fit to ceramic CBN emery wheel; Temperature rise rate is also had any different in the differing temps scope, and temperature curve is precisely controlled under the control of digital display temperature control table, thereby guarantees that product accomplishes the end in view.
Take with protection of inert gas roasting mode in B, the ceramic CBN emery wheel working lining high-temperature sintering process, guarantee that CBN intensity does not change, the no scaling loss in surface.
Embodiment
Embodiment 1
One, low-temperature binder preparation
1, the preparation of fritting ceramics powder:
Press material mixture ratio and be (by volume): aluminium sesquioxide 25, silicon-dioxide 32, sodium oxide 5.5; Potassium oxide 1.5, Natural manganese dioxide 2, quicklime 1.2; Boron trioxide 5 is with after the raw materials mix; Burn till through the insulation in 2 hours of 1600 degree, water-cooled, fragmentation, 240 standard sieves, undersize powder, oven dry excessively make the fritting ceramics powder again;
2, the preparation of low-temperature binder:
Press material mixture ratio and be (by volume): nano level aluminium sesquioxide 8, nanometer grade silica 10, fritting ceramics powder 85, raw materials mix is even through ball mill mixing, and resulting product is a low-temperature binder;
Two, the preparation of work abrasive material:
Take by weighing abrasive material (by volume) by following proportioning: low-temperature binder 33, white fused alumina 8, pottery float pearl 8; CBN45; Take by weighing intermediate layer (by volume) by following proportioning: low-temperature binder 30,150 order Ceramic Balls 60, be arranged on matrix on by universal method above-mentioned materials after; Temperature curve sintering by setting makes finished product; Said temperature curve is: 20 ℃ were warming up to 150 ℃ through 2 hours, were warming up to 500 ℃ through 3 hours again, were warming up to 750 ℃ through 3 hours again, last 750 ℃ of insulations 6 hours; In sintering process, adopt the neon protection.
Embodiment 2
One, low-temperature binder preparation
1, the preparation of fritting ceramics powder:
Press material mixture ratio and be (by volume): aluminium sesquioxide 35, silicon-dioxide 37, sodium oxide 4.5; Potassium oxide 2.5, Natural manganese dioxide 2.5, quicklime 0.8; Boron trioxide 11 is with after the raw materials mix; Burn till through the insulation in 2 hours of 1600 degree, water-cooled, fragmentation, 240 standard sieves, undersize powder, oven dry excessively make the fritting ceramics powder again;
2, the preparation of low-temperature binder:
Press material mixture ratio and be (by volume): nano level aluminium sesquioxide 12, nanometer grade silica 12, fritting ceramics powder 75, raw materials mix is even through ball mill mixing, and resulting product is a low-temperature binder;
Two, the preparation of work abrasive material:
Take by weighing abrasive material (by volume) by following proportioning: low-temperature binder 37, white fused alumina 9, pottery float pearl 6; CBN55; Take by weighing intermediate layer (by volume) by following proportioning: low-temperature binder 40,150 order Ceramic Balls 75, be arranged on matrix on by universal method above-mentioned materials after; Temperature curve sintering by setting makes finished product; Said temperature curve is: 20 ℃ were warming up to 150 ℃ through 2 hours, were warming up to 500 ℃ through 3 hours again, were warming up to 750 ℃ through 3 hours again, last 750 ℃ of insulations 6 hours; In sintering process, adopt argon shield.
Embodiment 3
One, low-temperature binder preparation
1, the preparation of fritting ceramics powder:
Press material mixture ratio and be (by volume): aluminium sesquioxide 30, silicon-dioxide 27, sodium oxide 5; Potassium oxide 2, Natural manganese dioxide 1.5, quicklime 1; Boron trioxide 8 after raw materials mix, burns till through the insulation in 2 hours of 1600 degree; Water-cooled, fragmentation, 240 standard sieves, undersize powder, oven dry excessively make the fritting ceramics powder again;
2, the preparation of low-temperature binder:
Press material mixture ratio and be (by volume): nano level aluminium sesquioxide 10, nanometer grade silica 8, fritting ceramics powder 80, raw materials mix is even through ball mill mixing, and resulting product is a low-temperature binder;
Two, the preparation of work abrasive material:
Take by weighing abrasive material (by volume) by following proportioning: low-temperature binder 35, white fused alumina 7, pottery float pearl 7; CBN50; Take by weighing intermediate layer (by volume) by following proportioning: low-temperature binder 35,150 order Ceramic Balls 55, be arranged on matrix on by universal method above-mentioned materials after; Temperature curve sintering by setting makes finished product; Said temperature curve is: 20 ℃ were warming up to 150 ℃ through 2 hours, were warming up to 500 ℃ through 3 hours again, were warming up to 750 ℃ through 3 hours again, last 750 ℃ of insulations 6 hours; In sintering process, adopt the helium protection.
Table 1 is that CBN pottery high speed grinding wheel of the present invention and Japanese Toyota ten thousand grinding abrasive disks processing like product parameter compare:
Table 1
Claims (4)
1. a CBN pottery high speed grinding wheel comprises steel matrix and work abrasive material, and it is characterized in that: said work abrasive material comprises abrasive material and intermediate layer; The material of said abrasive material is by volume: low-temperature binder 33-37; White fused alumina 7-9, pottery float pearl 6-8, CBN45-55; The material of said intermediate layer is by volume:: low-temperature binder 30-40,150 order Ceramic Balls 55-75; The material of said low-temperature binder is by volume: nano level aluminium sesquioxide 8-12, nanometer grade silica 8-12, fritting ceramics powder 75-85; The material of said fritting ceramics powder is by volume:: aluminium sesquioxide 25-35, silicon-dioxide 27-37, sodium oxide 4.5-5.5, potassium oxide 1.5-2.5, Natural manganese dioxide 1.5-2.5, quicklime 0.8-1.2, boron trioxide 5-11.
2. CBN pottery high speed grinding wheel according to claim 1 is characterized in that: 1350 ℃ of said 150 order Ceramic Balls heatproofs.
3. the preparation method of the said CBN pottery of a claim 1 high speed grinding wheel is characterized in that preparing as follows:
One, low-temperature binder preparation
(1) preparation of fritting ceramics powder:
By material be by volume:: aluminium sesquioxide 25-35, silicon-dioxide 27-37, sodium oxide 4.5-5.5; Potassium oxide 1.5-2.5, Natural manganese dioxide 1.5-2.5, quicklime 0.8-1.2; Boron trioxide 5-11 with raw materials mix after; Burn till through the insulation in 2 hours of 1600 degree, water-cooled, fragmentation, 240 standard sieves, undersize powder, oven dry excessively make the fritting ceramics powder again;
(2) preparation of low-temperature binder:
By material be by volume:: nano level aluminium sesquioxide 8-12, nanometer grade silica 8-12, fritting ceramics powder 75-85, raw materials mix is even through ball mill mixing, and resulting product is a low-temperature binder;
Two, the preparation of work abrasive material:
Take by weighing the abrasive material material by volume: low-temperature binder 33-37, white fused alumina 7-9, pottery float pearl 6-8; CBN45-55; Take by weighing the middle transition layer material by volume: low-temperature binder 30-40,150 order Ceramic Balls 55-75, be arranged on matrix on by universal method above-mentioned materials after; Temperature curve sintering by setting makes finished product; Said temperature curve is: 20 ℃ were warming up to 150 ℃ through 2 hours, were warming up to 500 ℃ through 3 hours again, were warming up to 750 ℃ through 3 hours again, last 750 ℃ of insulations 6 hours; In sintering process, adopt protection of inert gas.
4. the application of the said CBN pottery of claim 1 high speed grinding wheel is characterized in that: said CBN pottery high speed grinding wheel is applied to processing automobile engine crankshaft connecting rod neck.
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Cited By (6)
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| CN103831741A (en) * | 2014-02-11 | 2014-06-04 | 当涂县南方红月磨具磨料有限公司 | Ceramic and cubic boron nitride grinding wheel containing active carbon |
| CN103831739A (en) * | 2014-02-11 | 2014-06-04 | 当涂县南方红月磨具磨料有限公司 | High-temperature-resistant ceramic silicon carbide grinding wheel |
| CN103894940A (en) * | 2014-01-10 | 2014-07-02 | 当涂县南方红月磨具磨料有限公司 | Ceramic brown corundum grinding wheel containing expanded perlite |
| CN107805075A (en) * | 2017-10-24 | 2018-03-16 | 鹤山市旭威金刚石制品有限公司 | A kind of preparation method of vitrified bond and skive |
| CN109015421A (en) * | 2018-07-27 | 2018-12-18 | 安徽砥钻砂轮有限公司 | A kind of grinding wheel |
| CN111805442A (en) * | 2020-07-22 | 2020-10-23 | 江苏赛扬精工科技有限责任公司 | Hot-pressing high-strength ceramic CBN grinding wheel for grinding aerospace titanium alloy and preparation method thereof |
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| CN103831738A (en) * | 2014-02-11 | 2014-06-04 | 当涂县南方红月磨具磨料有限公司 | Cubic boron nitride grinding wheel containing surface active agent |
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| CN111805442A (en) * | 2020-07-22 | 2020-10-23 | 江苏赛扬精工科技有限责任公司 | Hot-pressing high-strength ceramic CBN grinding wheel for grinding aerospace titanium alloy and preparation method thereof |
| CN111805442B (en) * | 2020-07-22 | 2021-09-03 | 江苏赛扬精工科技有限责任公司 | Hot-pressing high-strength ceramic CBN grinding wheel for grinding aerospace titanium alloy and preparation method thereof |
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