CN107285748A - A kind of preparation method for being used to emulsify the ceramic composite of pump plunger - Google Patents

A kind of preparation method for being used to emulsify the ceramic composite of pump plunger Download PDF

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Publication number
CN107285748A
CN107285748A CN201710482374.5A CN201710482374A CN107285748A CN 107285748 A CN107285748 A CN 107285748A CN 201710482374 A CN201710482374 A CN 201710482374A CN 107285748 A CN107285748 A CN 107285748A
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plunger
ceramic
base substrate
powder
composite
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CN107285748B (en
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王旭东
杨建锋
王子敬
张亚明
王波
李春芳
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Fugu Xulin Electromechanical Technology Co Ltd
Xian Jiaotong University
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Fugu Xulin Electromechanical Technology Co Ltd
Xian Jiaotong University
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    • C04B35/63Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/6303Inorganic additives
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
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Abstract

A kind of preparation method for being used to emulsify the ceramic composite of pump plunger, aluminum oxide, hexagonal boron nitride, magnesia, calcium oxide, diopside are sufficiently mixed first, granulated after being sufficiently mixed again with mullite crystal whisker, powder is placed in hydrostatic pressing in mould, sintered into the aluminium oxide ceramics plunger blank of densification again, finally by grinding into the ceramic plunger with precise measure and precision;Compared with prior art, ceramic plunger material of the invention can effectively improve the toughness of ceramic plunger, reduce the coefficient of friction of plunger, improve the grinding type and yield rate of material, improve the service life of ceramic plunger.

Description

A kind of preparation method for being used to emulsify the ceramic composite of pump plunger
Technical field
The present invention relates to ceramic composite preparation field, more particularly to a kind of Ceramic Composite material for being used to emulsify pump plunger The preparation method of material.
Background technology
Emulsion power pack is one of key equipment of fully-mechanized mining working, and its normal operation directly affects high-productivity faces Productivity effect.Because the work period of emulsion pump is longer, thus it is quite strict to the quality requirement of its key component ceramic plunger.
It is compared from wearability, zirconia ceramics is 2 times of reinforced alumina ceramic, reinforced alumina ceramic is oxidation More than 4 times of aluminium ceramics;It is compared from fracture toughness, zirconia ceramics is ceramic 2-3 times of toughened aluminum oxide, toughness reinforcing oxygen It is 2 times of aluminium oxide ceramics or so to change aluminium ceramics.Zirconia ceramics performance is best suitable for the use condition in colliery, but from economic angle Consider on degree, zirconia ceramics is expensive, cost performance is low, and aluminium oxide ceramics is cheap but wearability and toughness are inadequate.Cause This emulsion pump plunger material selection reinforced alumina ceramic is the most reasonable, and there may be part in motion process for plunger Instantaneous heat, reinforced alumina ceramic is more stablized at high temperature than zirconium oxide.
Whisker is with certain draw ratio (diameter 0.1-1.8um, long 35-150um), and the few ceramic single crystal of defect.Tool There is very high intensity, be a kind of toughness reinforcing reinforcement of extraordinary ceramic matric composite;Fibre length is compared with ceramic whisker long number Times, it is also a kind of good ceramic toughening body, while both can composite utility.With the whiskers such as SiC, Si3N4 or the isometric fibre of C, SiC Dimension carries out composite toughening to aluminium oxide ceramics.The addition of whisker or fiber can increase break surface, that is, add the expansion of crackle Open up passage.When the dump energy of Crack Extension penetrates into fiber (whisker), extraction, unsticking and the fracture of generation fiber (whisker) When, cause that energy to failure is consumed or direction of crack propagation deflects, so that composite material toughness is improved.But when crystalline substance Must, fiber content it is higher when, densification is become difficult due to its arch bridge effect, so that under causing the decline and performance of density Drop.
For emulsification pump ceramic plunger, the sliding frictional wear between plunger and sealing ring is that influence is sealedly important Factor, and the lubrication between plunger and sealing ring is important means for reduction coefficient of friction.
The content of the invention
In order to overcome the shortcoming of above-mentioned prior art, it is an object of the invention to provide a kind of pottery for being used to emulsify pump plunger The preparation method of porcelain composite, with the addition of in the feed can play the mullite crystal whisker of toughening effect, play lubrication Hexagonal boron nitride and improve densified sintering product various sintering aids, the sintering of aluminium oxide ceramics plunger can be effectively improved Compactness, the toughness of material and lubricity.
In order to achieve the above object, the technical scheme taken of the present invention is:
A kind of preparation method for being used to emulsify the ceramic composite of pump plunger, comprises the following steps:
Step one;Shape the modulation of powder:
Enter again with mullite crystal whisker after alumina powder is sufficiently mixed with hexagonal boron nitride, magnesia, calcium oxide, diopside Row is sufficiently mixed, and obtained powder is granulated;Described granulation powder includes following components and parts by weight:Aluminum oxide 65- 90, hexagonal boron nitride 2-6, magnesia 1-3, calcium oxide 1-5, diopside 1-5, mullite crystal whisker 5-20.
Step 2;Isostatic pressing;
The compound particles obtained in step one are placed in cold isostatic compaction in mould, forming pressure 200-500MPa, Dwell time 1-10min, obtained base substrate directly carries out roughing;
Step 3;High temperature sintering;
Obtained rough machined base substrate is carried out to be sintered at high temperature into densification aluminium composite material base substrate, high temperature sintering temperature is 1500-1600℃.;
Step 4;Grinding;
By compact aluminum oxide composite ceramic plunger piston base substrate grinding into ceramic plunger.
Mould in described step two is made up of oil resistant rubber pipe sleeve, porous retainer, plug and plug.
Beneficial effects of the present invention:
It is an advantage of the current invention that the compactness and processing efficiency of aluminium oxide ceramics can be effectively improved, improve plunger Fracture toughness and lubricity, realize and prepare density height, good toughness, the aluminium oxide ceramics plunger that lubricity is excellent, dimensional accuracy is high Purpose, using core component of this compact aluminum oxide ceramic plunger as plunger pump, with service life length, it is wear-resisting, rub The low superiority of coefficient is wiped, the number of times that shutdown maintenance changes plunger and sealing shroud is reduced, engineering operation cost is saved, can also expand Open up other alumina parts.
Simultaneously because the addition of hexagonal boron nitride, effectively improves the machinability of material, the production effect of grinding is improved Rate.Through grinding, diameter and circularity dimensional tolerance range are<0.01mm, surface smoothness is 0.2.
Embodiment
The present invention is further described below.
Embodiment one
The preparation method of the present embodiment, comprises the following steps:
Step one;Shape the modulation of powder:
Enter again with mullite crystal whisker after alumina powder is sufficiently mixed with hexagonal boron nitride, magnesia, calcium oxide, diopside Row is sufficiently mixed, and obtained powder makes the abundant ball milling mixing of medium in ceramic vessel of water, uses sponging granulator drying-granulating; Prepared according to following parts by weight formula:
Step 2;Isostatic pressing;
The compound particles obtained in step one are loaded by plug, oil resistant rubber sleeve pipe, porous retainer and plug structure Into moulding mould special, be put into after sealing in the oil cylinder of cold isostatic press, pressurize 5 minutes is molded under 400MPa pressure; Blank roughing is first carried out after the demoulding;
Step 3;High temperature sintering;
Obtained rough machined base substrate is carried out to be sintered at high temperature into densification aluminium composite material base substrate, in 1550 degree of sintering At a temperature of, it is incubated 180 minutes;
Step 4;Grinding;
By compact aluminum oxide composite ceramic plunger piston base substrate through roughly grinding and refining, compact aluminum oxide ceramic plunger is made;Relatively Density is 99.2%, diameter tolerance 0.005-0.01mm, surface roughness 0.2.
Embodiment two
The preparation method of the present embodiment, comprises the following steps:
Step one;Shape the modulation of powder:
Enter again with mullite crystal whisker after alumina powder is sufficiently mixed with hexagonal boron nitride, magnesia, calcium oxide, diopside Row is sufficiently mixed, and obtained powder makes the abundant ball milling mixing of medium in ceramic vessel of water, uses sponging granulator drying-granulating; Prepared according to following parts by weight formula:
Step 2;Isostatic pressing;
The compound particles obtained in step one are loaded by plug, oil resistant rubber sleeve pipe, porous retainer and plug structure Into moulding mould special, be put into after sealing in the oil cylinder of cold isostatic press, pressurize 10 minutes is molded under 350MPa pressure; Blank roughing is first carried out after the demoulding;
Step 3;High temperature sintering;
Obtained rough machined base substrate is carried out to be sintered at high temperature into densification aluminium composite material base substrate, in 1530 degree of sintering At a temperature of, it is incubated 180 minutes;
Step 4;Grinding;
By compact aluminum oxide composite ceramic plunger piston base substrate through roughly grinding and refining, compact aluminum oxide ceramic plunger is made;Relatively Density is 99.5%, diameter tolerance 0.005-0.01mm, surface roughness 0.2.
Embodiment three
The preparation method of the present embodiment, comprises the following steps:
Step one;Shape the modulation of powder:
Enter again with mullite crystal whisker after alumina powder is sufficiently mixed with hexagonal boron nitride, magnesia, calcium oxide, diopside Row is sufficiently mixed, and obtained powder makes the abundant ball milling mixing of medium in ceramic vessel of water, uses sponging granulator drying-granulating; Prepared according to following parts by weight formula:
Step 2;Isostatic pressing;
The compound particles obtained in step one are loaded by plug, oil resistant rubber sleeve pipe, porous retainer and plug structure Into moulding mould special, be put into after sealing in the oil cylinder of cold isostatic press, pressurize 3 minutes is molded under 200MPa pressure; Blank roughing is first carried out after the demoulding;
Step 3;High temperature sintering;
Obtained rough machined base substrate is carried out to be sintered at high temperature into densification aluminium composite material base substrate, in 1580 degree of sintering At a temperature of, it is incubated 180 minutes;
Step 4;Grinding;
By compact aluminum oxide composite ceramic plunger piston base substrate through roughly grinding and refining, compact aluminum oxide ceramic plunger is made;Relatively Density is 98.5%, diameter tolerance 0.005-0.01mm, surface roughness 0.2.
Example IV
The preparation method of the present embodiment, comprises the following steps:
Step one;Shape the modulation of powder:
Enter again with mullite crystal whisker after alumina powder is sufficiently mixed with hexagonal boron nitride, magnesia, calcium oxide, diopside Row is sufficiently mixed, and obtained powder makes the abundant ball milling mixing of medium in ceramic vessel of water, uses sponging granulator drying-granulating; Prepared according to following parts by weight formula:
Step 2;Isostatic pressing;
The compound particles obtained in step one are loaded by plug, oil resistant rubber sleeve pipe, porous retainer and plug structure Into moulding mould special, be put into after sealing in the oil cylinder of cold isostatic press, pressurize 1 minute is molded under 300MPa pressure; Blank roughing is first carried out after the demoulding;
Step 3;High temperature sintering;
Obtained rough machined base substrate is carried out to be sintered at high temperature into densification aluminium composite material base substrate, in 1500 degree of sintering At a temperature of, it is incubated 180 minutes;
Step 4;Grinding;
By compact aluminum oxide composite ceramic plunger piston base substrate through roughly grinding and refining, compact aluminum oxide ceramic plunger is made;Relatively Density is 99.0%, diameter tolerance 0.005-0.01mm, surface roughness 0.2.Embodiment five
The preparation method of the present embodiment, comprises the following steps:
Step one;Shape the modulation of powder:
Enter again with mullite crystal whisker after alumina powder is sufficiently mixed with hexagonal boron nitride, magnesia, calcium oxide, diopside Row is sufficiently mixed, and obtained powder makes the abundant ball milling mixing of medium in ceramic vessel of water, uses sponging granulator drying-granulating; Prepared according to following parts by weight formula:
Step 2;Isostatic pressing;
The compound particles obtained in step one are loaded by plug, oil resistant rubber sleeve pipe, porous retainer and plug structure Into moulding mould special, be put into after sealing in the oil cylinder of cold isostatic press, pressurize 8 minutes is molded under 500MPa pressure; Blank roughing is first carried out after the demoulding;
Step 3;High temperature sintering;
Obtained rough machined base substrate is carried out to be sintered at high temperature into densification aluminium composite material base substrate, in 1600 degree of sintering At a temperature of, it is incubated 180 minutes;
Step 4;Grinding;
By compact aluminum oxide composite ceramic plunger piston base substrate through roughly grinding and refining, compact aluminum oxide ceramic plunger is made, through thick Mill and fine grinding, are made compact aluminum oxide ceramic plunger;Relative density is 99.3%, and diameter tolerance 0.005-0.01mm, surface is thick Rugosity 0.2.

Claims (1)

1. a kind of preparation method for being used to emulsify the ceramic composite of pump plunger, it is characterised in that comprise the following steps:
Step one;Shape the modulation of powder:
Filled again with mullite crystal whisker after alumina powder is sufficiently mixed with hexagonal boron nitride, magnesia, calcium oxide, diopside Divide mixing, obtained powder is granulated;Described granulation powder includes following components and parts by weight:Aluminum oxide 65-90, six Square boron nitride 2-6, magnesia 1-3, calcium oxide 1-5, diopside 1-5, mullite crystal whisker 5-20;
Step 2;Isostatic pressing;
The compound particles obtained in step one are placed in cold isostatic compaction in mould, forming pressure 200-500MPa, pressurize Time, 1-10min obtained base substrate;
Step 3;High temperature sintering;
Obtained base substrate is carried out to be sintered at high temperature into densification aluminium composite material base substrate, high temperature sintering temperature is 1500-1600 DEG C;
Step 4;Grinding;
By compact aluminum oxide composite ceramic plunger piston base substrate grinding into ceramic plunger.
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Publication number Priority date Publication date Assignee Title
EP0482981B1 (en) * 1990-10-24 1995-04-19 Savoie Refractaires Refractory materials consisting of aluminium nitride-bonded grains, containing boron nitride or graphite inclusions, and a process for their manufacture
US20040157725A1 (en) * 2003-02-07 2004-08-12 Doza Douglas K. Crack-resistant dry refractory
WO2009025313A1 (en) * 2007-08-22 2009-02-26 Nihon Yamamura Glass Co., Ltd. Glass composition for sealing
JP4455786B2 (en) * 2001-07-31 2010-04-21 日本碍子株式会社 Method for producing porous material and method for producing hollow granules used therefor
CN105541307A (en) * 2016-01-08 2016-05-04 梁小利 High-strength aluminum oxide ceramic with good thermal shock resistance and preparation method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0482981B1 (en) * 1990-10-24 1995-04-19 Savoie Refractaires Refractory materials consisting of aluminium nitride-bonded grains, containing boron nitride or graphite inclusions, and a process for their manufacture
JP4455786B2 (en) * 2001-07-31 2010-04-21 日本碍子株式会社 Method for producing porous material and method for producing hollow granules used therefor
US20040157725A1 (en) * 2003-02-07 2004-08-12 Doza Douglas K. Crack-resistant dry refractory
WO2009025313A1 (en) * 2007-08-22 2009-02-26 Nihon Yamamura Glass Co., Ltd. Glass composition for sealing
CN105541307A (en) * 2016-01-08 2016-05-04 梁小利 High-strength aluminum oxide ceramic with good thermal shock resistance and preparation method thereof

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