CN114292109A - Preparation method of silicon carbide microcrystalline abrasive body - Google Patents
Preparation method of silicon carbide microcrystalline abrasive body Download PDFInfo
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- CN114292109A CN114292109A CN202210082731.XA CN202210082731A CN114292109A CN 114292109 A CN114292109 A CN 114292109A CN 202210082731 A CN202210082731 A CN 202210082731A CN 114292109 A CN114292109 A CN 114292109A
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Abstract
The invention provides a preparation method of a silicon carbide microcrystal abrasive material body, which is characterized in that carbide or boride is added into silicon carbide superfine powder, the size of crystal is controlled, and microcrystal particles are sintered by a temporary bonding agent in a vacuum environment to prepare the silicon carbide microcrystal abrasive material body with comprehensive technical indexes such as shape, size, hardness, strength and the like meeting the requirements of grinding and milling processes.
Description
Technical Field
The invention relates to the technical field of new materials, in particular to a preparation method of a silicon carbide microcrystalline abrasive body.
Background
Silicon carbide is an inorganic substance, has a chemical formula of SiC, and is prepared by smelting quartz sand, petroleum coke (or coal coke), wood chips (salt is required when green silicon carbide is produced) and other raw materials in a resistance furnace at high temperature; the silicon carbide produced by the Chinese industry is divided into black silicon carbide and green silicon carbide, both are hexagonal crystals, the specific gravity is 3.20-3.25, and the microhardness is 2840-3320 kg/mm2(ii) a Among the non-oxide high-tech refractory raw materials such as C, N, B, silicon carbide is the most widely and economically used material, and is widely used in abrasive grain processing techniques such as grinding and milling.
The essence of the abrasive particle processing technology such as grinding, grinding and the like is that the abrasive particles and abrasive bodies are used for removing materials with comprehensive physical and chemical effects on the surface of a workpiece, along with the high precision, low chemical change, low cost, high reproducibility and high quality development of the abrasive particle processing technology such as nano-grade grinding, fixed abrasive grinding, high-efficiency deep grinding, high-speed grinding, ultrahigh-speed grinding, slow feed grinding, green grinding, abrasive belt grinding and the like, and the updating and replacing popularization and application of a micro-nano-grade ultra-fine particle new material in the precision and ultra-precision industries in the new technological period, the abrasive particle processing technology such as grinding, grinding and the like has higher requirements on the comprehensive characteristics such as hardness, strength, cutting toughness, thermal stability, chemical stability, small fine particle size, particle plasticity, processing cost and the like, and has the requirements on high hardness, strength, good cutting toughness, high thermal stability, good chemical stability and the like, The novel abrasive body with smaller granularity, strong granule plasticity and relatively low processing cost meets the high-quality requirements of abrasive particle processing technologies such as grinding and grinding in the new science and technology period.
Disclosure of Invention
In order to achieve the aim, the invention provides a preparation method of a silicon carbide microcrystalline abrasive body, which comprises the steps of adding carbide or boride into silicon carbide ultrafine powder, controlling the size of crystals, sintering the mixture into microcrystalline particles by using a temporary bonding agent in a vacuum environment, and preparing the silicon carbide microcrystalline abrasive body with comprehensive technical indexes such as shape, size, hardness, strength and the like meeting the requirements of grinding and grinding processes.
The invention is realized by the following technical scheme:
a method for preparing a microcrystalline silicon carbide abrasive body, comprising the steps of:
s1: selecting silicon carbide superfine powder with the granularity less than 5 microns as a base material I;
s2: adding an additive into the base material I to form a base material II, wherein the weight of the additive accounts for 0.1-5 wt% of the total weight of the base material II;
s3: adding a bonding agent into the base material II to form a base material III, wherein the weight of the bonding agent accounts for 1-20 wt% of the total weight of the base material III;
s4: adding a lubricant and a release agent into a base material III to form a base material IV, wherein the weight sum of the lubricant and the release agent accounts for 0.1-1 wt% of the total weight of the base material IV;
s5: adding water to the base material IV to form a base material V, wherein the weight of the water accounts for 40-60 wt% of the total weight of the base material V;
s6: uniformly mixing the base material V and then carrying out spray granulation to form a base material VI;
s7: through a molding manufacturing method, the base material VI is made into a blank body with a shape required by a user, and the blank body is dried to form a base material VII;
s8: putting the base material VII into a vacuum heat treatment furnace, heating to 1800-2300 ℃ in a vacuum environment, and carrying out vacuum heat treatment to obtain the silicon carbide microcrystalline abrasive body;
wherein the additive in step S2 is tungsten carbide, or boron carbide, or titanium boride;
in the step S3, the bonding agent is a mixture formed by mixing three materials of cellulose, resin and PVP-K90 according to any proportion;
the molding method in step S7 is a roll molding method, a press molding method, or an extrusion molding method.
Compared with the prior art, the invention has the beneficial effects that:
1. the silicon carbide microcrystal abrasive material body prepared by the scheme of the invention has the characteristic of extremely small crystal size, the granularity is generally below 5 micrometers, so the force dispersion is extremely good, and microcrystal single particles fall off during grinding, so that the abrasive material is not easy to break, the service life is prolonged, and the grinding efficiency is improved.
2. When the silicon carbide microcrystal abrasive material prepared by the scheme of the invention is used as a grinding medium, the grinding medium is used in a high-speed environment, the abrasion loss of the grinding medium is small, and the pollution to the grinding object material is less.
3. When the silicon carbide microcrystal abrasive material prepared by the scheme is used as a ceramic grinding wheel, the size of crystals can be well controlled, abnormal growth of the crystals is inhibited, and the heat dissipation capacity of the grinding wheel is improved.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
Example 1:
the preparation method of the microcrystalline silicon carbide abrasive body comprises the following steps:
a method for preparing a microcrystalline silicon carbide abrasive body, comprising the steps of:
s1: selecting silicon carbide superfine powder with the particle size of 2 microns as a base material I;
s2: adding titanium boride into the base material I to form a base material II, wherein the weight of the titanium boride accounts for 2.5wt% of the total weight of the base material II;
s3: adding a bonding agent formed by mixing three materials of cellulose, resin and PVP-K90 according to a ratio of 2:3:5 into a base material II to form a base material III, wherein the weight of the bonding agent accounts for 8wt% of the total weight of the base material III;
s4: adding a lubricant and a release agent into the base material III to form a base material IV, wherein the weights of the lubricant and the release agent respectively account for 0.3wt% and 0.3wt% of the total weight of the base material IV;
s5: adding water to the base material IV to form a base material V, wherein the weight of the water accounts for 55wt% of the total weight of the base material V;
s6: uniformly mixing the base material V and then carrying out spray granulation to form a base material VI;
s7: the base material VI is made into a blank body with the shape required by a user by an extrusion molding manufacturing method, and the blank body is dried to form a base material VII;
s8: and putting the base material VII into a vacuum heat treatment furnace, heating to 1900-2100 ℃ in a vacuum environment, and carrying out vacuum heat treatment to obtain the silicon carbide microcrystalline abrasive body.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (7)
1. A preparation method of a silicon carbide microcrystal abrasive body is characterized by comprising the following steps: the preparation method of the silicon carbide microcrystalline abrasive body comprises the following steps:
s1: selecting silicon carbide superfine powder with the granularity less than 5 microns as a base material I;
s2: adding an additive into the base material I to form a base material II, wherein the weight of the additive accounts for 0.1-5 wt% of the total weight of the base material II;
s3: adding a bonding agent into the base material II to form a base material III, wherein the weight of the bonding agent accounts for 1-20 wt% of the total weight of the base material III;
s4: adding a lubricant and a release agent into a base material III to form a base material IV, wherein the weight sum of the lubricant and the release agent accounts for 0.1-1 wt% of the total weight of the base material IV;
s5: adding water to the base material IV to form a base material V, wherein the weight of the water accounts for 40-60 wt% of the total weight of the base material V;
s6: uniformly mixing the base material V and then carrying out spray granulation to form a base material VI;
s7: through a molding manufacturing method, the base material VI is made into a blank body with a shape required by a user, and the blank body is dried to form a base material VII;
s8: putting the base material VII into a vacuum heat treatment furnace, heating to 1800-2300 ℃ in a vacuum environment, and carrying out vacuum heat treatment to obtain the silicon carbide microcrystalline abrasive body;
wherein the additive in step S2 is tungsten carbide, or boron carbide, or titanium boride;
in the step S3, the bonding agent is a mixture formed by mixing three materials of cellulose, resin and PVP-K90 according to any proportion;
the molding method in step S7 is a roll molding method, a press molding method, or an extrusion molding method.
2. The method for preparing a microcrystalline silicon carbide abrasive body according to claim 1, wherein the method comprises the steps of: in the step S1, the particle size of the silicon carbide ultrafine powder is selected to be 2 μm.
3. The method for preparing a microcrystalline silicon carbide abrasive body according to claim 1, wherein the method comprises the steps of: in the step S2, titanium boride is added into the base material I to form a base material II, wherein the weight of the titanium boride accounts for 2.5wt% of the total weight of the base material II.
4. The method for preparing a microcrystalline silicon carbide abrasive body according to claim 1, wherein the method comprises the steps of: and in the step S3, the binder is formed by mixing three materials of cellulose, resin and PVP-K90 according to the proportion of 2:3:5, and the weight of the binder accounts for 8wt% of the total weight of the base material III.
5. The method for preparing a microcrystalline silicon carbide abrasive body according to claim 1, wherein the method comprises the steps of: in the step S4, the weight of the lubricant and the weight of the release agent respectively account for 0.3wt% and 0.3wt% of the total weight of the base material IV.
6. The method for preparing a microcrystalline silicon carbide abrasive body according to claim 1, wherein the method comprises the steps of: the weight of the water in the step S5 accounts for 55wt% of the total weight of the base material V.
7. The method for preparing a microcrystalline silicon carbide abrasive body according to claim 1, wherein the method comprises the steps of: the temperature for carrying out the vacuum heat treatment on the base material VII in the step S8 is 1900 ℃ to 2100 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210082731.XA CN114292109A (en) | 2022-01-25 | 2022-01-25 | Preparation method of silicon carbide microcrystalline abrasive body |
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| CN202210082731.XA CN114292109A (en) | 2022-01-25 | 2022-01-25 | Preparation method of silicon carbide microcrystalline abrasive body |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101434828A (en) * | 2008-12-19 | 2009-05-20 | 天津大学 | Sintering grinding medium and preparation thereof |
| CN102634319A (en) * | 2012-03-30 | 2012-08-15 | 天津大学 | Novel microcrystalline abrasive for super-hard abrasive tools and production method thereof |
| WO2014022453A1 (en) * | 2012-08-02 | 2014-02-06 | 3M Innovative Properties Company | Abrasive element precursor with precisely shaped features and method of making thereof |
| CN106944939A (en) * | 2017-03-17 | 2017-07-14 | 衢州学院 | It is a kind of add soluble resin material from superhard fine grinding tool pellet of dressing and preparation method thereof |
| CN113913155A (en) * | 2021-09-29 | 2022-01-11 | 河南工业大学 | Preparation method of low-temperature ceramic-bonded SiC abrasive |
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2022
- 2022-01-25 CN CN202210082731.XA patent/CN114292109A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101434828A (en) * | 2008-12-19 | 2009-05-20 | 天津大学 | Sintering grinding medium and preparation thereof |
| CN102634319A (en) * | 2012-03-30 | 2012-08-15 | 天津大学 | Novel microcrystalline abrasive for super-hard abrasive tools and production method thereof |
| WO2014022453A1 (en) * | 2012-08-02 | 2014-02-06 | 3M Innovative Properties Company | Abrasive element precursor with precisely shaped features and method of making thereof |
| CN106944939A (en) * | 2017-03-17 | 2017-07-14 | 衢州学院 | It is a kind of add soluble resin material from superhard fine grinding tool pellet of dressing and preparation method thereof |
| CN113913155A (en) * | 2021-09-29 | 2022-01-11 | 河南工业大学 | Preparation method of low-temperature ceramic-bonded SiC abrasive |
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