CN110590370A - Manufacturing process of special ceramic water pump overflowing piece - Google Patents
Manufacturing process of special ceramic water pump overflowing piece Download PDFInfo
- Publication number
- CN110590370A CN110590370A CN201910888085.4A CN201910888085A CN110590370A CN 110590370 A CN110590370 A CN 110590370A CN 201910888085 A CN201910888085 A CN 201910888085A CN 110590370 A CN110590370 A CN 110590370A
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- ceramic
- manufacturing process
- sintering
- water pump
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
- B28B1/087—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould
- B28B1/0873—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould the mould being placed on vibrating or jolting supports, e.g. moulding tables
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
- C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/584—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride
- C04B35/591—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride obtained by reaction sintering
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/007—Details, component parts, or accessories especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/026—Selection of particular materials especially adapted for liquid pumps
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/428—Silicon
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/46—Gases other than oxygen used as reactant, e.g. nitrogen used to make a nitride phase
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Ceramic Products (AREA)
Abstract
The invention discloses a manufacturing process of a special ceramic water pump overflowing piece, which comprises the steps of raw material proportioning, vibration molding, dry sintering, ceramic and metal composite treatment and lathe processing. The raw materials in the raw material proportion are graded by adopting large, medium and small particles, and are mixed and stirred in a stirrer, so that the finished product density of the special ceramic product is improved, proper additives are added in the raw materials in the raw material proportion in the stirring process, the using amount of water is reduced, the solid content of the prepared raw materials is further improved, two holes are formed in the lower part of a saggar of a sintering furnace used for drying and sintering, nitrogen is injected into one hole in the sintering process, the pressure of the saggar is detected by the other hole, the pressure of the saggar is always kept at 100Pa under the nitrogen pressure, the temperature is controlled according to the change of the pressure, the nitridation reaction is sufficient, a ceramic and metal composite water pump overflowing part structure is formed in the ceramic and metal composite treatment process, the wear resistance, the corrosion resistance and the falling resistance of the overflowing.
Description
Technical Field
The invention relates to a manufacturing process, in particular to a manufacturing and processing process of a silicon nitride and silicon carbide combined water pump overflowing part, and belongs to the technical field of manufacturing and processing of special ceramics.
Background
The water pump overflowing piece generally refers to an impeller, a volute, a front guard plate and a rear guard plate, and parts which are in direct contact with liquid conveyed by the water pump. The water pump overflowing piece is generally made of metal materials, is poor in abrasion resistance and corrosion resistance, and adopts special ceramics formed by combining silicon nitride and silicon carbide to replace overflowing pieces made of traditional metal materials. The characteristics of the special ceramic are fully exerted, the ceramic is wear-resistant and corrosion-resistant, and the service life is greatly prolonged. But the special ceramic has the defects of high forming difficulty, poor toughness and difficult processing.
Disclosure of Invention
The invention aims to solve the problems of the special ceramics through a whole set of manufacturing process.
The invention realizes the purpose through the following technical scheme: a manufacturing process of a special ceramic water pump overflowing piece comprises the steps of raw material proportioning, vibration molding, drying and sintering, ceramic and metal composite treatment and lathe machining, and comprises the following process steps:
(1) the raw material ratio is as follows: adding a proper amount of water and a reinforcing agent into silicon carbide and silicon powder in a specific container according to the gradation proportion and mixing;
(2) vibration molding: fixing a prefabricated mold on a vibration molding device, and molding the raw materials into a green solid;
(3) drying and sintering: forcibly drying the green body and then sintering the green body in a sintering furnace to prepare a semi-finished product;
(4) and (3) ceramic and metal composite treatment: the sintered ceramic and the prefabricated metal shell are bonded and compounded together;
(5) lathe machining: and (4) using a special polishing device, and processing the diamond tool bit into a finished product.
Preferably, in order to improve the finished product density of the special ceramic product, the raw materials in the raw material proportion are graded by using large, medium and small particles, and are mixed and stirred in a stirrer.
Preferably, in order to increase the solid content of the prepared raw materials, the raw materials are proportioned and proper additives are added in the process of stirring the raw materials.
Preferably, in order to facilitate the molding of the raw material in the mold, in the vibration molding process, the raw material is poured into the mold provided on the vibration table, and the vibration force is transmitted to the mold by the vibration of the motors provided at the four corners of the vibration table.
Preferably, in order to ensure that the formed product is uniformly heated in the sintering process, a sagger is built in the sintering furnace used for drying and sintering, and the sagger is a hexahedral sealed sagger stacked by adopting a fire-resistant flame-isolating plate.
Preferably, in order to maintain the pressure of the sagger at 100Pa all the time and to make the nitriding reaction sufficient, two holes are opened at the lower part of the sagger of the sintering furnace used for dry sintering, and nitrogen is injected into one of the holes during sintering, and the pressure of the sagger is detected by the other hole.
Preferably, in order to improve the wear resistance and corrosion resistance of the water pump overflowing part and improve the falling resistance of the ceramic water pump overflowing part, during the composite treatment of ceramic and metal, the ceramic is positioned on the inner side, and the metal shell is wrapped on the outer side of the ceramic to form a ceramic and metal composite water pump structure.
The invention has the beneficial effects that: the special ceramic water pump overflowing part has reasonable design of manufacturing process, raw materials in raw material proportion are graded by large, medium and small particles and are mixed and stirred in a stirrer, the density of finished products of the special ceramic product is improved, proper additives are added in the raw material proportion in the stirring process of the raw materials, the using amount of water is reduced, the solid content of the prepared raw materials can be further improved, in the vibration forming process, the raw materials are poured into a mold arranged on a vibration workbench, the vibration force is transmitted to the mold through the vibration of motors arranged at four corners of the vibration workbench, the raw materials are formed in the mold, the forming density is improved, the filling is more sufficient, a sagger is built in a sintering furnace used for drying and sintering, in addition, the hexahedral sealed sagger stacked by adopting fire-resistant flame-isolating plates can be heated around the sintering furnace, and further uniform heating of formed products in the sintering process can be ensured, two holes are arranged at the lower part of a saggar of a sintering furnace used for drying and sintering, nitrogen is injected into one hole during sintering, the pressure of the saggar is detected by the other hole, silicon of a green body can react with the nitrogen during sintering to generate silicon nitride, the pressure in the saggar can be reduced, because the silicon nitride is easy to be insufficiently nitrided during the production process, the reaction is more violent along with the higher temperature during the nitriding process, the more nitrogen is needed, the pressure of the nitrogen is detected by a pressure measuring hole, the nitriding degree is judged according to the pressure of the saggar, the temperature is controlled, the air inflow is adjusted to ensure that the nitriding is sufficient, the pressure of the saggar is always kept at the nitrogen pressure of 100Pa, the temperature is controlled according to the change of the pressure, the nitriding reaction is sufficient, when the ceramic and the metal are subjected to composite treatment, the ceramic is positioned at the inner side, and a, on the one hand, the wear resistance and the corrosion resistance of the water pump overflowing piece can be improved, on the other hand, the falling resistance of the ceramic water pump overflowing piece can be improved, and the service life of the ceramic water pump overflowing piece is prolonged.
Drawings
FIG. 1 is a schematic view of the process of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a manufacturing process of a special ceramic water pump flow passage element includes the steps of raw material proportioning, vibration molding, dry sintering, ceramic and metal composite processing and lathe processing, and the process includes:
(1) the raw material ratio is as follows: adding a proper amount of water and a reinforcing agent into silicon carbide and silicon powder in a specific container according to the gradation proportion and mixing;
(2) vibration molding: fixing a prefabricated mold on a vibration molding device, and molding the raw materials into a green solid;
(3) drying and sintering: forcibly drying the green body and then sintering the green body in a sintering furnace to prepare a semi-finished product;
(4) and (3) ceramic and metal composite treatment: the sintered ceramic and the prefabricated metal shell are bonded and compounded together;
(5) lathe machining: and (4) using a special polishing device, and processing the diamond tool bit into a finished product.
The raw materials in the raw material proportion are graded by adopting large, medium and small particles, and are mixed and stirred in a stirrer, so that the finished product density of the special ceramic product is improved, the raw material proportion is characterized in that a proper additive is added in the stirring process of the raw materials, the using amount of water is reduced, and the solid content of the prepared raw materials can be improved, in the vibration forming process, the raw materials are poured into a die arranged on a vibration workbench, the vibration force is transmitted to the die through the vibration of motors arranged at four corners of the vibration workbench, the raw materials are formed in the die, the formed density is improved, the filling is more sufficient, a sagger is built in a sintering furnace used for drying and sintering, in addition, the hexahedron sealed sagger built by adopting a fireproof flame isolation plate can be used, the periphery of the sintering furnace can be heated, and the formed product can be heated uniformly in the sintering process, two holes are formed in the lower portion of a saggar of a sintering furnace used for drying and sintering, nitrogen is injected into one hole during sintering, the pressure of the saggar is detected by the other hole, silicon of a green body can react with the nitrogen during sintering to generate silicon nitride, the pressure in the saggar can be reduced, the pressure in the saggar is easy to be insufficiently nitrided during the production process of the silicon nitride, the reaction is more violent along with the higher temperature during the nitriding process, the nitrogen pressure is detected by a pressure measuring hole, the nitriding degree is judged according to the pressure of the saggar, the temperature is controlled, the air inflow is adjusted to ensure that the nitriding is sufficient, the pressure of the saggar is always kept at the nitrogen pressure of 100Pa, the temperature is controlled according to the change of the pressure, the nitriding reaction is sufficient, when the ceramic and the metal are subjected to composite treatment, the ceramic is positioned on the inner side, and a metal shell is, on the one hand, the wear resistance and the corrosion resistance of the water pump overflowing piece can be improved, on the other hand, the falling resistance of the ceramic water pump overflowing piece can be improved, and the service life of the ceramic water pump overflowing piece is prolonged. .
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. The manufacturing process of the special ceramic water pump overflowing piece is characterized in that: the method comprises the following steps of raw material proportioning, vibration molding, drying and sintering, ceramic and metal composite treatment and lathe processing, and comprises the following process steps:
(1) the raw material ratio is as follows: adding a proper amount of water and a reinforcing agent into silicon carbide and silicon powder in a specific container according to the gradation proportion and mixing;
(2) vibration molding: fixing a prefabricated mold on a vibration molding device, and molding the raw materials into a green solid;
(3) drying and sintering: forcibly drying the green body and then sintering the green body in a sintering furnace to prepare a semi-finished product;
(4) and (3) ceramic and metal composite treatment: the sintered ceramic and the prefabricated metal shell are bonded and compounded together;
(5) lathe machining: and (4) using a special polishing device, and processing the diamond tool bit into a finished product.
2. The manufacturing process of the special ceramic water pump overflowing part of claim 1, wherein the manufacturing process comprises the following steps: the raw materials in the raw material proportion are graded by adopting large, medium and small particles, and are mixed and stirred in a stirrer, so that the finished product density of the special ceramic product is improved.
3. The manufacturing process of the special ceramic water pump overflowing member of claim 1 or 2, wherein the manufacturing process comprises the following steps: the raw materials are proportioned, and a proper additive is added in the stirring process of the raw materials, so that the using amount of water is reduced.
4. The manufacturing process of the special ceramic water pump overflowing part of claim 1, wherein the manufacturing process comprises the following steps: in the vibration forming process, the raw materials are poured into a mold arranged on a vibration workbench, and the vibration force is transmitted to the mold through the vibration of motors arranged at the four corners of the vibration workbench.
5. The manufacturing process of the special ceramic water pump overflowing part of claim 1, wherein the manufacturing process comprises the following steps: a sagger is built in a sintering furnace used for drying and sintering, and the sagger is a hexahedral sealed sagger built by adopting fire-resistant flame-isolating plates.
6. The manufacturing process of the special ceramic water pump overflowing member of claim 1 or 5, wherein the manufacturing process comprises the following steps: two holes are formed in the lower portion of a sagger of a sintering furnace used for drying and sintering, nitrogen is injected into one hole during sintering, and the pressure of the sagger is detected through the other hole.
7. The manufacturing process of the special ceramic water pump overflowing part of claim 1, wherein the manufacturing process comprises the following steps: during the ceramic and metal composite treatment, the ceramic is positioned at the inner side, and the metal shell is wrapped at the outer side of the ceramic to form a ceramic and metal composite water pump overflowing part structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910888085.4A CN110590370A (en) | 2019-09-19 | 2019-09-19 | Manufacturing process of special ceramic water pump overflowing piece |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910888085.4A CN110590370A (en) | 2019-09-19 | 2019-09-19 | Manufacturing process of special ceramic water pump overflowing piece |
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| CN110590370A true CN110590370A (en) | 2019-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910888085.4A Pending CN110590370A (en) | 2019-09-19 | 2019-09-19 | Manufacturing process of special ceramic water pump overflowing piece |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113649772A (en) * | 2021-08-17 | 2021-11-16 | 江苏三条鱼新材料科技有限公司 | Production process of high-temperature structural ceramic/metal composite pipe for aluminum alloy die casting machine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06183840A (en) * | 1992-12-21 | 1994-07-05 | Ngk Spark Plug Co Ltd | Silicon nitride-silicon carbide-based reactionally sintered compact |
| CN201443536U (en) * | 2009-01-22 | 2010-04-28 | 张旋 | Novel slurry pump |
| CN104016693A (en) * | 2014-06-11 | 2014-09-03 | 上海大学 | Preparation method of carbide bonded silicon nitride fireproof material |
| CN205677867U (en) * | 2016-06-04 | 2016-11-09 | 保定亿嘉特种陶瓷制造有限公司 | A kind of ceramic pump |
-
2019
- 2019-09-19 CN CN201910888085.4A patent/CN110590370A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06183840A (en) * | 1992-12-21 | 1994-07-05 | Ngk Spark Plug Co Ltd | Silicon nitride-silicon carbide-based reactionally sintered compact |
| CN201443536U (en) * | 2009-01-22 | 2010-04-28 | 张旋 | Novel slurry pump |
| CN104016693A (en) * | 2014-06-11 | 2014-09-03 | 上海大学 | Preparation method of carbide bonded silicon nitride fireproof material |
| CN205677867U (en) * | 2016-06-04 | 2016-11-09 | 保定亿嘉特种陶瓷制造有限公司 | A kind of ceramic pump |
Non-Patent Citations (2)
| Title |
|---|
| 李伯民: "《现代工业系统概论》", 30 September 2006, 国防工业出版社 * |
| 湖南省醴陵瓷器工业公司: "《日用细瓷生产工艺》", 30 November 1987, 湖南省醴陵瓷器工业公司；湖南省醴陵陶瓷研究所 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113649772A (en) * | 2021-08-17 | 2021-11-16 | 江苏三条鱼新材料科技有限公司 | Production process of high-temperature structural ceramic/metal composite pipe for aluminum alloy die casting machine |
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Application publication date: 20191220 |