CN114939646A - TiC metal ceramic particle reinforced composite wear-resistant grinding roller and preparation process thereof - Google Patents
TiC metal ceramic particle reinforced composite wear-resistant grinding roller and preparation process thereof Download PDFInfo
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- CN114939646A CN114939646A CN202210608810.XA CN202210608810A CN114939646A CN 114939646 A CN114939646 A CN 114939646A CN 202210608810 A CN202210608810 A CN 202210608810A CN 114939646 A CN114939646 A CN 114939646A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/02—Casting in, on, or around objects which form part of the product for making reinforced articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/004—Shape or construction of rollers or balls
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/30—Shape or construction of rollers
- B02C4/305—Wear resistant rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
- C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/067—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds comprising a particular metallic binder
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/10—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on titanium carbide
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses a TiC metal ceramic particle reinforced composite wear-resistant grinding roller and a preparation process thereof, wherein the melting wetting angle of TiC metal ceramic particles and an iron matrix is less than 30 o The composite material has good wettability with iron base, and pores are not easy to generate in the composite material; the TiC metal ceramic particles have the thermal expansion coefficient close to that of the alloy matrix and the polarity of chemical bonds is similar, so that the TiC metal ceramic particles have high bonding strength with the matrix and are not easy to fall off in the using process. TiC metal ceramic particles containing 10-30 wt%Iron alloy as a binder phase with a fracture toughness of more than 8 MPa m 1/2 The load is obviously higher than ZTA, and can be applied to the working condition with higher extrusion or impact load.
Description
Technical Field
The invention relates to the technical field of composite wear-resistant grinding roller manufacturing processes, in particular to a TiC metal ceramic particle reinforced composite wear-resistant grinding roller and a preparation process thereof.
Background
With the rapid development of scientific technology, various production industries put forward higher requirements on production efficiency, and in order to adapt to the trend, the industries such as cement building materials, power plants, mines, sandstone aggregates, machine-made sand, construction wastes and the like also put forward higher requirements on the performances of crushing, extruding and grinding key equipment in the production, but the existing metal wear-resistant materials can only partially meet the requirements. For example, most of the core wear-resistant products of crushing and extruding grinding equipment in the current cement production, such as crusher hammers, particle boards, ball mill lining boards, crusher cones, grinding discs and grinding rolls of vertical mills and the like, are single-component metal wear-resistant materials, such as high-chromium cast iron, medium-chromium steel, high-manganese steel, ultrahigh-manganese steel and the like, and are produced by adopting a casting process. Mineral raw materials required by production in industries such as cement building materials, power plants, mines and the like are high in hardness and abrasion resistance, and a traditional metal wear-resistant product is prone to failure due to too fast abrasion in the service process and is difficult to meet the requirement of long-time stable work of crushing and extruding grinding equipment.
In recent years, many domestic scientific research institutes and related enterprises are dedicated to research and development of matrix surface strengthening technologies such as bimetal compounding, hard alloy embedding compounding, surface spraying, surface casting infiltration and laser cladding, and the like, all aims to improve the hardness and the wear resistance of the product surface, and research has made certain progress and is applied to products such as hammers, lining plates and the like. Although the wear resistance and service life of the product are improved to a certain extent, the problems of low wear resistance and short service life of the metal wear-resistant material cannot be fundamentally solved.
At present, a lot of research and development work is carried out on the reinforcing aspect of the titanium carbide particle reinforced iron-based alloy by some foreign enterprises. The technological process includes smelting high hardness titanium carbide ceramic grains into porous body, smelting iron matrix and vacuum infiltration. Under the production condition of the process, the ceramic particle titanium carbide has better bonding property with the iron matrix, and the service life of the wear-resistant material can be greatly prolonged.
Research and development work is carried out in China on ZTA particles/iron-based composite wear-resistant materials, but the process has certain problems at present. First, because the ZTA particles have a contact angle with the molten iron alloy of greater than 100 o The wettability is poor, so that a certain amount of air holes exist in the ZTA/iron-based composite material casting, and the strength of the casting is obviously reduced; secondly, because the bonding strength of ZTA particles and the iron alloy matrix is low, ZTA is easy to fall off from the matrix in the service process, thereby causing the service life of the wear-resistant casting to be greatly reduced; finally, because the ZTA material is hard and brittle and has poor impact resistance, the ZTA material is easy to break in a working environment with high impact load, the wear resistance of the product is improved to a limited extent, and both the breaking and extrusion grinding processes in cement production have impact working conditions.
Compared with ZTA particles, the melting wetting angle of TiC metal ceramic particles and iron matrix is less than 30 o The composite material has good wettability with iron base, and pores are not easy to generate in the composite material; the TiC metal ceramic particles have the thermal expansion coefficient close to that of the alloy matrix and the polarity of chemical bonds is similar, so that the TiC metal ceramic particles are high in bonding strength with the matrix and are not easy to fall off in the using process. The TiC metal ceramic particles contain 10-30 wt% of iron alloy as a bonding phase, and the fracture toughness of the TiC metal ceramic particles exceeds 8 MPa.m 1/2 The load is obviously higher than ZTA, and can be applied to the working condition with higher extrusion or impact load.
Disclosure of Invention
The invention aims to make up the defects that the grinding roller prepared by the prior art has higher abrasion speed, the grain size distribution and the size of grains in the preparation process of a TiC metal ceramic preform and the design shape of the preform, and provides the TiC metal ceramic grain reinforced composite abrasion-resistant grinding roller and the preparation process thereof.
The invention is realized by the following technical scheme:
a preparation process of a TiC metal ceramic particle reinforced composite wear-resistant grinding roller comprises the following specific steps:
(1) uniformly mixing 70-90wt% of TiC micro powder and 10-30 wt% of iron-based alloy powder, and granulating and sintering to obtain TiC metal ceramic particles;
(2) pressing TiC metal ceramic particles into a honeycomb network TiC metal ceramic particle prefabricated body by a dry pressing method;
(3) arranging a TiC metal ceramic particle prefabricated body at a specified position of a casting mould sand mould, and enabling the TiC metal ceramic particle prefabricated body to be positioned on the outer working surface of the formed composite wear-resistant grinding roller to form a TiC metal ceramic particle reinforced composite wear-resistant layer; and then pouring high-temperature molten iron in the mold sand type cavity of the mold, filling the mold sand type cavity of the mold with the high-temperature molten iron, wrapping the TiC metal ceramic particle prefabricated body, and solidifying and compounding to obtain the TiC metal ceramic particle reinforced iron-based composite wear-resistant grinding roller.
The temperature of the granulation sintering is 1350-1450 ℃, and the time duration is 60-80 minutes.
The dry pressing method is to press the honeycomb network TiC metal ceramic particles into a green compact in a press machine at 150-250 MPa for 60-120 s under pressure.
The shape of the casting sand mold cavity is a drum shape, the TiC metal ceramic particle prefabricated body is an arc-shaped block and matched with the radian of the inner wall of the casting sand mold cavity, a plurality of TiC metal ceramic particle prefabricated bodies are attached to the inner wall of the casting sand mold cavity in parallel, and 1450-1500 ℃ high-temperature molten iron is poured.
A TiC metal ceramic particle reinforced composite wear-resistant grinding roller comprises an iron-based matrix, wherein the iron-based matrix is drum-shaped, and a TiC metal ceramic particle reinforced composite wear-resistant layer is arranged on an arc-shaped working surface on the side surface of the iron-based matrix.
The invention has the advantages that: the melting wetting angle of the TiC metal ceramic particles and the iron matrix in the invention is less than 30 o The composite material has good wettability with iron base, and pores are not easy to generate in the composite material; thermal expansion of TiC metal ceramic particles and alloy matrixThe coefficient is close, the polarity of chemical bonds is similar, so that the bonding strength with the matrix is high, and the composite material is not easy to fall off in the using process; the TiC metal ceramic particles contain 10-30 wt% of iron alloy as a bonding phase, and the fracture toughness of the TiC metal ceramic particles exceeds 8 MPa.m 1/2 The load is obviously higher than ZTA, and can be applied to the working condition with higher extrusion or impact load.
Drawings
FIG. 1 is a schematic structural diagram of a TiC cermet particle preform according to the present invention.
FIG. 2 is a schematic view of the TiC cermet particle reinforced composite wear-resistant grinding roller of the present invention.
Detailed Description
As shown in fig. 1 and 2, a preparation process of a TiC cermet particle reinforced composite wear-resistant grinding roller comprises the following specific steps:
(1) uniformly mixing 70-90wt% of TiC micro powder and 10-30 wt% of iron-based alloy powder, carrying out wet ball milling by a ball mill according to a certain mass ratio, taking out, drying, re-granulating and sintering to obtain TiC metal ceramic particles;
(2) pressing TiC metal ceramic particles into a honeycomb network TiC metal ceramic particle prefabricated body 1 by a dry pressing method;
(3) arranging a TiC metal ceramic particle prefabricated body 1 at a specified position of a casting mould sand mould, and enabling the TiC metal ceramic particle prefabricated body 1 to be positioned on the outer working surface of the formed composite wear-resistant grinding roller to form a TiC metal ceramic particle reinforced composite wear-resistant layer 2; and then pouring high-temperature molten iron in the mold sand type cavity of the mold, filling the mold sand type cavity of the mold with the high-temperature molten iron and wrapping the TiC metal ceramic particle prefabricated body, and solidifying and carrying out composite molding to obtain the TiC metal ceramic particle composite wear-resistant grinding roller supported by the iron-based matrix.
The temperature of the granulation sintering is 1350-1450 ℃, and the time duration is 60-80 minutes.
The dry pressing method is to press the honeycomb network TiC metal ceramic particles into a green compact in a press machine at 150-250 MPa for 60-120 s under pressure.
The shape of the casting sand mold cavity is a drum shape, the TiC metal ceramic particle prefabricated bodies 1 are arc-shaped blocks and matched with the radian of the inner wall of the casting sand mold cavity, a plurality of TiC metal ceramic particle prefabricated bodies 1 are attached to the inner wall of the casting sand mold cavity in parallel, and high-temperature molten iron at 1450-1500 ℃ is poured.
A TiC metal ceramic particle reinforced composite wear-resistant grinding roller comprises an iron-based matrix 3, wherein the iron-based matrix 3 is in a drum shape, and a TiC metal ceramic particle reinforced composite wear-resistant layer 2 is arranged on an arc-shaped working surface on the side surface of the iron-based matrix 3.
The first embodiment is as follows:
a preparation process of a TiC metal ceramic particle reinforced composite wear-resistant grinding roller comprises the following specific steps:
(1) uniformly mixing 70wt% of TiC micro powder and 10 wt% of iron-based alloy powder, granulating and sintering at 1350 ℃ for 60 minutes, and carrying out heat preservation and cooling to obtain TiC metal ceramic particles;
(2) pressing TiC metal ceramic particles into a honeycomb network TiC metal ceramic particle prefabricated body 1 by a dry pressing method; the dry pressing method is to press the blank in a press machine for 60s under the pressure of 150 MPa.
(3) Arranging a TiC metal ceramic particle prefabricated body at a specified position of a casting mould sand mould, and enabling the TiC metal ceramic particle prefabricated body 1 to be positioned on the outer working surface of the formed composite wear-resistant grinding roller to form a TiC metal ceramic particle reinforced composite wear-resistant layer 2; and then pouring high-temperature molten iron at 1450 ℃ into the mold cavity of the mold sand mold, filling the mold cavity of the mold sand mold with the high-temperature molten iron and wrapping the TiC metal ceramic particle prefabricated body, and solidifying and carrying out composite molding to obtain the TiC metal ceramic particle composite wear-resistant grinding roller supported by the iron-based matrix.
Example two:
a preparation process of a TiC metal ceramic particle reinforced composite wear-resistant grinding roller comprises the following specific steps:
(1) uniformly mixing 80wt% of TiC micro powder and 20 wt% of iron-based alloy powder, granulating and sintering at 1400 ℃ for 70 minutes, and carrying out heat preservation and cooling to obtain TiC metal ceramic particles;
(2) pressing TiC metal ceramic particles into a honeycomb network TiC metal ceramic particle prefabricated body 1 by a dry pressing method; the dry pressing method is to press the blank in a press machine for 90s under the pressure of 200 MPa.
(3) Arranging a TiC metal ceramic particle prefabricated body at a specified position of a casting mould sand mould, and enabling the TiC metal ceramic particle prefabricated body 1 to be positioned on the outer working surface of the formed composite wear-resistant grinding roller to form a TiC metal ceramic particle reinforced composite wear-resistant layer 2; and then pouring high-temperature molten iron at 1480 ℃ into the mold cavity of the mold sand mold, filling the mold cavity of the mold sand mold with the high-temperature molten iron and wrapping the TiC metal ceramic particle prefabricated body, and solidifying and carrying out composite molding to obtain the TiC metal ceramic particle composite wear-resistant grinding roller supported by the iron-based matrix.
Example three:
a preparation process of a TiC metal ceramic particle reinforced composite wear-resistant grinding roller comprises the following specific steps:
(1) uniformly mixing 90wt% of TiC micro powder and 30 wt% of iron-based alloy powder, granulating and sintering at 1450 ℃ for 80 minutes, and carrying out heat preservation and cooling to obtain TiC metal ceramic particles;
(2) pressing TiC metal ceramic particles into a honeycomb network TiC metal ceramic particle prefabricated body 1 by a dry pressing method; the dry pressing method is to press the blank in a press machine for 120s under the pressure of 250 MPa.
(3) Arranging a TiC metal ceramic particle prefabricated body at a specified position of a casting mould sand mould, and enabling the TiC metal ceramic particle prefabricated body 1 to be positioned on the outer working surface of the formed composite wear-resistant grinding roller to form a TiC metal ceramic particle reinforced composite wear-resistant layer 2; and then, pouring high-temperature molten iron at 1500 ℃ into the mold cavity of the mold sand mold, filling the mold cavity of the mold sand mold with the high-temperature molten iron, wrapping the TiC metal ceramic particle prefabricated body 1, and solidifying and compounding to obtain the TiC metal ceramic particle composite wear-resistant grinding roller supported by the iron-based matrix.
Claims (5)
1. A preparation process of a TiC metal ceramic particle reinforced composite wear-resistant grinding roller is characterized by comprising the following steps of: the method comprises the following specific steps:
(1) uniformly mixing 70-90wt% of TiC micro powder and 10-30 wt% of iron-based alloy powder, and granulating and sintering to obtain TiC metal ceramic particles;
(2) pressing TiC metal ceramic particles into a honeycomb network TiC metal ceramic particle prefabricated body by a dry pressing method;
(3) arranging a TiC metal ceramic particle prefabricated body at a specified position of a casting mould sand mould, and enabling the TiC metal ceramic particle prefabricated body to be positioned on the outer working surface of the formed composite wear-resistant grinding roller to form a TiC metal ceramic particle reinforced composite wear-resistant layer; and then pouring high-temperature molten iron in the mold sand type cavity of the mold, filling the mold sand type cavity of the mold with the high-temperature molten iron, wrapping the TiC metal ceramic particle prefabricated body, and solidifying and carrying out composite molding to obtain the TiC metal ceramic particle reinforced iron-based composite wear-resistant grinding roller.
2. The preparation process of the TiC metal ceramic particle reinforced composite wear-resistant grinding roller of claim 1, which is characterized in that: the temperature of the granulation sintering is 1350-1450 ℃, and the time duration is 60-80 minutes.
3. The preparation process of the TiC metal ceramic particle reinforced composite wear-resistant grinding roller of claim 1, which is characterized in that: the dry pressing method is to press the honeycomb network TiC metal ceramic particles into a green compact in a press machine at 150-250 MPa for 60-120 s under pressure.
4. The preparation process of the TiC metal ceramic particle reinforced composite wear-resistant grinding roller of claim 1, which is characterized in that: the shape of the casting sand mold cavity is a drum shape, the TiC metal ceramic particle prefabricated body is an arc-shaped block and matched with the radian of the inner wall of the casting sand mold cavity, a plurality of TiC metal ceramic particle prefabricated bodies are attached to the inner wall of the casting sand mold cavity in parallel, and 1450-1500 ℃ high-temperature molten iron is poured.
5. The utility model provides a compound wear-resisting grinding roller of TiC cermet granule reinforcing which characterized in that: the wear-resistant steel plate comprises an iron-based matrix, wherein the iron-based matrix is drum-shaped, and a TiC metal ceramic particle reinforced composite wear-resistant layer is arranged on the arc-shaped working surface of the side surface of the iron-based matrix.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116079027A (en) * | 2022-12-05 | 2023-05-09 | 桐乡磊石微粉有限公司 | Preparation method of centrifugal casting metal ceramic composite grinding roller for glass fiber industry |
| CN116217246A (en) * | 2023-02-27 | 2023-06-06 | 合肥水泥研究设计院有限公司 | Inorganic binder and preparation method of inorganic binder/TiC composite material |
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| CN105689642A (en) * | 2016-02-02 | 2016-06-22 | 扬州电力设备修造厂有限公司 | Preparation method for common casting iron-based ceramic composite vertical grinding roller |
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2022
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| US4853182A (en) * | 1987-10-02 | 1989-08-01 | Massachusetts Institute Of Technology | Method of making metal matrix composites reinforced with ceramic particulates |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116079027A (en) * | 2022-12-05 | 2023-05-09 | 桐乡磊石微粉有限公司 | Preparation method of centrifugal casting metal ceramic composite grinding roller for glass fiber industry |
| CN116079027B (en) * | 2022-12-05 | 2024-02-06 | 桐乡磊石微粉有限公司 | Preparation method of centrifugal casting metal ceramic composite grinding roller for glass fiber industry |
| CN116217246A (en) * | 2023-02-27 | 2023-06-06 | 合肥水泥研究设计院有限公司 | Inorganic binder and preparation method of inorganic binder/TiC composite material |
| CN116217246B (en) * | 2023-02-27 | 2023-12-19 | 合肥水泥研究设计院有限公司 | Inorganic binder and preparation method of inorganic binder/TiC composite material |
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