CN110695331B - Preparation process of metal ceramic plate and metal ceramic plate - Google Patents
Preparation process of metal ceramic plate and metal ceramic plate Download PDFInfo
- Publication number
- CN110695331B CN110695331B CN201910982936.1A CN201910982936A CN110695331B CN 110695331 B CN110695331 B CN 110695331B CN 201910982936 A CN201910982936 A CN 201910982936A CN 110695331 B CN110695331 B CN 110695331B
- Authority
- CN
- China
- Prior art keywords
- metal
- ceramic
- pressure
- ceramic particles
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
-
- 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
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
-
- 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
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
- C22C1/1047—Alloys containing non-metals starting from a melt by mixing and casting liquid metal matrix composites
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Composite Materials (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
The invention provides a preparation process of a metal ceramic plate and the metal ceramic plate, and relates to the technical field of wear-resistant material preparation. And when liquid forging compounding is carried out, the metal ceramic mixed liquid in the cavity is filled more in place and compactly through the extrusion effect and constant-pressure feeding on the metal ceramic mixed liquid, and the strength and the impact toughness of the metal ceramic plate are further improved.
Description
Technical Field
The invention relates to the technical field of wear-resistant material preparation, in particular to a preparation process of a metal ceramic plate and the metal ceramic plate.
Background
With the rapid development of modern industrial and technological levels, the wear resistance of materials is required to be higher and higher for production equipment in industries such as electric power, cement, mine, metallurgy and coal, for example, wearing parts made of metal in the equipment are in contact with different rough materials such as coal mine, sand and stone, soil and grinding bodies when in use, so that metal parts are worn, and a large amount of metal is consumed annually. For production plants, according to statistical analysis in the prior art, more than one third of the energy used for the operation of the plant is related to the friction, wear of the material. For metal parts, about 80% of part failures are caused by part rubbing, and over 50% of part failures are caused by abrasive wear.
In the prior art, the improvement of the wear resistance of a metal material is mainly realized by compounding two or more materials in a physical or chemical mode to form a composite material with high wear resistance, such as the process research on a particle reinforced steel-based composite material. The metal ceramic composite wear-resistant material disclosed in patent CN109467437A is prepared by preparing a porous silicon carbide ceramic substrate by using silicon carbide particles, kaolin, metal silicon powder, an auxiliary agent and a binding agent, and then pouring a high-temperature molten metal material onto the porous silicon carbide ceramic substrate; the strength, impact toughness and wear resistance of the material are improved by organically combining metal and ceramic; for another example, in a method for preparing a cermet wear-resistant composite material disclosed in CN104139185A, ceramic particles or ceramic particles subjected to surface pretreatment are uniformly mixed with self-fluxing alloy powder by using polyvinyl alcohol to obtain a mixture; filling the mixture into a mold cavity of a press mold, placing a plain steel gasket at the bottom of the mold cavity in advance, and drying a biscuit and the gasket after the mixture is molded and demolded by a press; the dried biscuit and the gasket are sintered in vacuum, and the metal ceramic wear-resistant composite material is obtained after the biscuit and the gasket are cooled and discharged out of the furnace; the ceramic particle composite material is pressed and sintered and then is compounded on the surface of the wear-resistant part; the patent includes the metal ceramic composite wear-resistant material formed by pouring, and the ceramic substrates are respectively prepared in the process of sintering the biscuit and the gasket, which can cause the integral distribution of ceramic particles in metal to be uneven and the binding force to be poor, the matrix metal is restricted by the traditional casting mode, the instability of mechanical property also causes the plate prepared by the material to be easy to crack, the heat treatment is not convenient after the metal and the ceramic are compounded, the physical and chemical properties of the material are limited, and therefore, the black metal composite ceramic workpiece produced by the traditional casting mode is difficult to popularize.
China belongs to a large production country, and the consumption of ferrous metal is far higher than that of other countries, so that the research and development of the metal ceramic composite material which has high structural strength, high wear resistance and long service life and can be applied to improve the wear resistance of ferrous metal has obvious influence on the effective utilization of metal energy in China.
Disclosure of Invention
The invention aims to provide a preparation process of a metal ceramic plate and the metal ceramic plate, wherein the volume fraction and uniformity of ceramic particles in metal are improved by adopting a mode of mixing the ceramic particles along with flow and compounding liquid forging, the bonding strength of the ceramic particles and the metal is improved, and the strength and the wear resistance of the metal ceramic plate are obviously improved.
In order to achieve the above purpose, the invention provides the following technical scheme: a preparation process of a metal ceramic plate comprises the following steps:
1) pretreating metal and ceramic particles and a mould: melting solid metal into molten metal, ceramic particles and respectively preheating a die;
2) mixing with the flow: guiding molten metal to a pressure chamber container of the mold by adopting a chute, injecting preheated ceramic particles into the molten metal flowing in the chute at a set speed, mixing the preheated ceramic particles with the molten metal along with flow, and then flowing into the pressure chamber container of the mold to form a metal ceramic mixed solution;
3) liquid forging compounding: closing the mold, moving the pressure device at the bottom of the pressure chamber container upwards, and pushing the metal ceramic mixed liquid to instantaneously fill the cavity along an ingate which is arranged on the mold and communicated with the cavity of the mold in a pressure injection fluid mode;
4) solidifying metal, maintaining pressure and feeding: within a set duration, the pressure device keeps constant pressure, continuously injects the metal ceramic mixed liquid into the cavity under pressure, keeps the cavity full, and makes metal solidify and feed;
5) and (3) cooling and taking: releasing the pressure by a pressure device, cooling and solidifying the metal ceramic mixed liquid in the cavity within a set cooling time, opening the mold after the set cooling time is reached, and taking out the metal ceramic plate prefabricated part;
6) heat treatment of the metal ceramic plate prefabricated part: and (3) annealing, quenching and tempering the metal ceramic plate prefabricated part taken out of the die in sequence to obtain the metal ceramic plate with qualified mechanical property.
Further, the grain size of the ceramic particles in the step 1) is 1.5mm-3mm, the preheating temperature of the ceramic particles is 900 ℃, the preheating temperature of the die is 200-300 ℃, and the preheating in advance is favorable for reducing the thermal stress generated by compounding the ceramic particles and molten metal to prepare the metal ceramic material, and avoiding and reducing the tendency of cracking of the metal ceramic plate.
Further, the ceramic particles preheated in the step 2) are placed in a particle sprayer with an opening on one side, the opening of the particle sprayer faces the opening of the chute, the spraying speed of the particle sprayer to the ceramic particles is not lower than 6m/s, the ceramic particles are convenient to sink into the molten metal, the floating speed of the ceramic particles in the molten metal is reduced, the ceramic and the molten metal are mixed along with the flow according to a set quantity ratio, the volume fraction of the ceramic particles in the molten metal is increased, and the wetting effect of the ceramic and the metal is enhanced.
Furthermore, the chute is preheated before diversion, the preheating temperature is 900-1100 ℃, and the phenomenon that the chute with low temperature is directly contacted with high-temperature molten metal to cause cooling and crusting of part of the molten metal is avoided.
Further, in the step 3), the pressure device is a plunger head which is hermetically connected to the bottom of the pressure chamber container, and the plunger head has a freedom degree of moving in the pressure chamber container along the up-and-down direction; the process for injecting fluid under pressure by the plug injection head comprises the following steps: after the die is closed, the injection plug head moves upwards under the action of pressure to push the metal ceramic mixed liquid to fill the die cavity along the ingate instantaneously.
Further, the opening of the ingate at one side of the cavity in the step 3) is in a fan shape.
Further, the duration time set in the step 4) is 5min, and the constant pressure maintained by the pressure device is 120 MPa.
Further, the heat treatment process for the metal ceramic plate preform in the step 6) comprises the following steps: annealing at 980 ℃ for 6h, cooling to 500 ℃ with the furnace, discharging and air cooling; quenching at 1000 ℃ for 6h, discharging and air cooling to 200 ℃; tempering for 16h at 350 ℃, discharging and air cooling.
Further, the metal is ferrous metal.
In addition, the invention also discloses a metal ceramic plate prepared by adopting the preparation process of the metal ceramic plate.
According to the technical scheme, the preparation process of the metal ceramic plate and the metal ceramic plate provided by the technical scheme of the invention have the following beneficial effects:
the preparation process of the metal ceramic plate disclosed by the invention adopts a liquid forging compounding mode after ceramic particles and metal liquid are mixed along with flow to prepare the metal ceramic plate, wherein the ceramic particles are incident into the metal liquid to realize primary mixing of the ceramic particles and the metal liquid, the volume fraction of the ceramic particles in the metal is increased, and then a pressure device in a liquid forging compounding stage pushes and extrudes metal ceramic mixed liquid to realize secondary mixing of the ceramic particles and the metal liquid; and when liquid forging compounding is carried out, the metal ceramic mixed liquid in the cavity is filled more in place and compactly by the extrusion effect and constant-pressure feeding on the metal ceramic mixed liquid, so that the strength and the impact toughness of the metal ceramic plate are improved. In addition, the invention reduces the thermal stress generated by compounding the ceramic particles and the molten metal to prepare the metal ceramic material by preheating the ceramic particles and the die, and avoids and reduces the tendency of cracking of the metal ceramic plate.
In addition, the metal smelted in the invention is ferrous metal, the ferrous metal has higher melting point, and the technical difficulty of improving the wear resistance is higher than that of preparing a metal ceramic material by common low-melting-point metal in the prior art.
It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be considered as part of the inventive subject matter of this disclosure unless such concepts are mutually inconsistent.
The foregoing and other aspects, embodiments and features of the present teachings can be more fully understood from the following description taken in conjunction with the accompanying drawings. Additional aspects of the present invention, such as features and/or advantages of exemplary embodiments, will be apparent from the description which follows, or may be learned by practice of specific embodiments in accordance with the teachings of the present invention.
Drawings
The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is a flow chart of a process for manufacturing a cermet plate according to the present invention.
Detailed Description
In order to better understand the technical content of the present invention, specific embodiments are described below with reference to the accompanying drawings.
In this disclosure, aspects of the present invention are described with reference to the accompanying drawings, in which a number of illustrative embodiments are shown. Embodiments of the present disclosure are not intended to include all aspects of the present invention. It should be appreciated that the various concepts and embodiments described above, as well as those described in greater detail below, may be implemented in any of numerous ways, as the disclosed concepts and embodiments are not limited to any one implementation. In addition, some aspects of the present disclosure may be used alone, or in any suitable combination with other aspects of the present disclosure.
Based on the fact that in the metal ceramic material prepared in the prior art, ceramic is unevenly dispersed in metal, the prepared plate is uneven in wear-resisting effect, and the prepared plate is easy to crack due to poor wetting effect and loose combination of the ceramic and metal liquid, and the impact toughness of the whole plate is poor; the invention aims to disclose a preparation process of a metal ceramic plate and the metal ceramic plate, which can effectively improve the wettability of ceramic particles mixed in molten metal, improve the bonding strength of the ceramic particles and metal, and improve the wear resistance and impact toughness of the metal ceramic plate.
The process for manufacturing a cermet plate and the cermet plate according to the present invention will be further described in detail with reference to the examples shown in the drawings.
Referring to fig. 1, the preparation process of the cermet plate of the present invention specifically includes the steps of: 1) pretreating metal and ceramic particles and a mould: melting solid metal into molten metal, ceramic particles and respectively preheating a die; 2) mixing with the flow: guiding the molten metal to a pressure chamber container of the mold by adopting a chute, injecting preheated ceramic particles into the molten metal flowing in the chute, mixing the preheated ceramic particles with the molten metal along with the flow, and then flowing into the pressure chamber container of the mold to form a metal ceramic mixed solution; 3) liquid forging compounding: closing the die, and moving a pressure device at the bottom of the pressure chamber container upwards to push the metal ceramic mixed liquid to instantaneously fill the die cavity in a fluid injection mode along an ingate which is arranged on the die and communicated with the die cavity of the die; 4) solidifying metal, maintaining pressure and feeding: within a set duration, the pressure device keeps constant pressure, continuously injects the metal ceramic mixed liquid into the cavity under pressure, keeps the cavity full, and makes metal solidify and feed; 5) and (3) cooling and taking: releasing the pressure by a pressure device, cooling and solidifying the metal ceramic mixed liquid in the cavity within a set cooling time, opening the mold after the set cooling time is reached, and taking out the metal ceramic plate prefabricated part; 6) heat treatment of the metal ceramic plate prefabricated part: and sequentially annealing, quenching and tempering the metal ceramic plate prefabricated member taken out of the die to obtain the metal ceramic plate.
The preparation method mainly solves the three technical problems, and firstly, the ceramic phase and the metal phase have good wettability so as to ensure good combination of the ceramic phase and the metal phase; secondly, avoiding the condition that no obvious chemical reaction can occur between the ceramic and the metal so as to maintain the characteristics of the material, such as the toughness of the metal and the wear resistance of the ceramic; thirdly, the ceramic phase is distributed in a metal matrix according to a desired mode, the volume fraction of the ceramic in the metal is increased as much as possible, and the ceramic particle pieces are not agglomerated.
In order to ensure good wettability of the ceramic particles and the molten metal in the embodiment of the invention, the ceramic particles are injected into the high-temperature molten metal guided by the chute at a constant speed and in a fixed quantity manner, so that primary mixing of the ceramic particles and the molten metal is realized, the metal-ceramic mixed liquid is pushed and extruded by the pressure device in the liquid forging composite stage so that secondary mixing of the ceramic particles and the molten metal is realized, and the wettability between the ceramic particles and the metal phase is effectively improved and improved after the two times of mixing. Moreover, based on the secondary mixing of the ceramic particles and the molten metal, the distribution trend of the ceramic particles in the molten metal is effectively improved, so that the ceramic particles are distributed in a metal matrix in a desired manner, such as uniform dispersion; meanwhile, based on the incident speed of the ceramic particles, the ceramic particles are not accumulated on the surface of the molten metal and can be deposited in the molten metal, and the volume fraction of the ceramic particles in the metal is effectively increased when the metal ceramic plate is formed; in addition, as the molten metal and the ceramic are subjected to feeding and cooling under the combined action of a high-temperature and pressure device to be formed in the cavity, the whole process is a physical process, and the process does not undergo chemical reaction, so that the characteristics of the metal and the ceramic material are effectively ensured.
The following process steps of the cermet plate are described in detail with reference to specific embodiments:
firstly, a bottom blowing argon intermediate frequency electric furnace is adopted in the embodiment, the required set metal is smelted, and simultaneously ceramic particles and a mould used for the plate to be molded in the embodiment are preheated, wherein the preheating temperature of the ceramic particles is 900 ℃, and the preheating temperature of the mould is 200-300 ℃; the metal in the invention refers to ferrous metal, including steel, high-chromium cast iron, alloy ductile iron and the like, the high-chromium cast iron is selected in the embodiment, the ferrous metal has a higher melting point, and the technical difficulty of improving the wear resistance of the ferrous metal is higher than that of a cermet material made of common low-melting-point metal in the prior art; the ceramic particles are ZTA ceramic particles, and the main component is Al2O3And ZrO, the grain size of the selected ceramic grains is between 1.5mm and 3mm, and the ceramic grains with proper size are beneficial to the forming and the performance of the metal ceramic plate. The preheating of the ceramic particles and the die is beneficial to reducing the thermal stress generated by compounding the ceramic particles and the molten metal in the die to prepare the metal ceramic material, and the tendency of cracking of the metal ceramic plate is avoided and reduced.
The high-temperature preheating of the ceramic particles is beneficial to improving the fluidity of the metal ceramic mixed liquid, reducing the thermal stress after the metal composite ceramic and avoiding and reducing the cracking tendency of the workpiece; the preheated ceramic particles are put into a particle sprayer for standby, the particle sprayer is set as a device capable of accelerating the ceramic particles, a hopper used for loading the ceramic particles and controlling the ceramic flow is arranged above the particle sprayer, and an opening is formed in one side edge of the particle sprayer.
Secondly, completely melting qualified molten metal, such as high-chromium cast iron in the embodiment, pouring the molten metal into a preheated ladle at the tapping temperature of 1500 ℃, flowing the molten metal to a die pressure chamber container through a chute, preheating the chute to 900-; when the metal liquid is poured, the grain spraying machine is started, and because the opening of the grain spraying machine faces to the opening of the chute, when the high-temperature metal liquid is poured from the chute and guided, the grain spraying machine is started to spray ceramic particles with fixed speed and fixed proportion of metal ceramic into the metal liquid in the chute along the opening to mix along with the metal liquid, the high-temperature ceramic particles sprayed out quickly are injected into the metal liquid to reach the bottom of the liquid, and penetrate through the metal liquid through the ceramic particles at the pouring moment, so that the aim of stirring and mixing the ceramic particles and the metal liquid is fulfilled; the chute adds the mixed solution of the smelted metal and the ceramic into a pressure chamber container of the mould.
In the embodiment, in order to avoid the resistance of the molten metal with high density to the ceramic particles, the molten metal floats on the upper layer and the surface of the molten metal, the spraying speed of the particle sprayer to the ceramic particles is not lower than 6m/s, generally between 6m/s and 8m/s, and the maximum throughput of the particle sprayer is 4kg/s, so that the ceramic particles and the molten metal are completely mixed. In the specific implementation process, the amount of the ceramic particles sprayed by the particle spraying machine can be adjusted according to actual production requirements, so that the quality of the ceramic particles mixed with the molten metal is adjusted, and the adjustment of the volume fraction of the ceramic in the metal ceramic plate is realized.
In addition, in the embodiment, the pressure device at the bottom of the pressure chamber is arranged as a plunger head which is connected to the inner wall of the pressure chamber container in a sealing manner, the plunger head has the freedom degree of moving in the pressure chamber container along the up-down direction, the bottom of the plunger head is connected with a hydraulic cylinder, and the hydraulic cylinder is started to push the plunger head to move in the pressure chamber container along the up-down direction; after the die is closed, the injection plug head moves up rapidly under the action of pressure to push the metal ceramic mixed liquid to fill the die cavity instantly in the form of injection fluid along a set ingate on the die, and finally the metal ceramic mixed liquid is solidified in the die cavity to form a metal ceramic prefabricated part. In the embodiment, the pressure applied to the injection plug head is 120MPa, so that the pressure of the upward movement of the injection plug head to the ceramic-metal mixed liquid in the bottom of the pressure chamber is 120MPa, the upward speed of the injection plug head is 80mm/s, the stroke is 290mm, the diameter of the injection plug head is 320mm, and the flow rate of the metal-ceramic mixed liquid injected from the inner pouring gate can reach 6500cm 3/s. In order to ensure that the metal ceramic mixed liquid can be quickly filled into the cavity, the opening of the ingate on one side of the cavity is fan-shaped, and the fan-shaped structure is favorable for slowing down the flow rate of the metal ceramic mixed liquid, reducing the impact of the metal ceramic mixed liquid on the cavity, and facilitating the homogenization of ceramic particles and metal liquid and the filling of the cavity.
The mould selected by the embodiment of the invention is a 4000-ton liquid metal forging hydraulic press, and after an upper mould and a lower mould of the mould are closed, two closed spaces, namely a pressure chamber container and a cavity, which are communicated through an ingate are formed, and the pressure chamber container and the cavity form an isobaric environment; when the injection plug moves upwards to push the metal ceramic mixed liquid to fill the cavity, the metal ceramic mixed liquid in the pressure chamber container can be further mixed under the action of pressure, so that secondary mixing of the metal liquid and the ceramic particles is realized; and due to the isobaric environment formed by the pressure chamber container and the cavity, when the metal ceramic mixed liquid in the cavity begins to shrink and solidify, the injection plug head continuously extrudes the metal ceramic mixed liquid in the pressure chamber container to the cavity under the action of constant pressure to supplement, the constant pressure holding time of the injection plug head is set to be 5min, the constant pressure is set to be 120MPa, and the technical effect of continuously cooling and supplementing the cavity is achieved. Based on the isobaric environment that surge-chamber container and die cavity constitute to under the constant pressure of notes stopper head, make the cermet board that forms in the die cavity even and fine and close, the wet effect of reinforcing pottery and metal, metal and pottery combine inseparabler, metal and ceramic's parcel intensity is superior to gravity method direct bonding, and the filling of cermet mixed liquor in the die cavity is also more in place under the effect of pressure.
After cooling feeding of the poured metal ceramic mixed liquid is completed, pressure of the plug is released, cooling is continued for 5 minutes, the mold is opened, the metal ceramic prefabricated plate obtained by the cavity is taken out, further heat treatment is carried out on the metal ceramic prefabricated plate, heat modification is carried out on metal, and the metal ceramic prefabricated plate is prevented from being brittle failure; the method specifically comprises the following steps: after taking the parts, the metal ceramic prefabricated plate with the temperature enters a furnace for high-temperature annealing, uneven structures and internal stress in metal contained in the metal ceramic prefabricated plate are eliminated, the process is that annealing is carried out for 6 hours at 980 ℃, and the metal ceramic prefabricated plate is taken out of the furnace and cooled in air when the temperature is reduced to 500 ℃; quenching for 6 hours at 1000 ℃, improving the matrix hardness of the metal ceramic plate, discharging from the furnace and air cooling to 200 ℃; and then the blank is put into a furnace for tempering for 16 hours at 350 ℃, the internal stress of metal is reduced, the brittleness is reduced, the impact toughness is improved, and the blank is taken out of the furnace for natural air cooling to obtain the metal ceramic plate.
The invention also discloses a metal ceramic plate manufactured by adopting the preparation process, which is used for detecting the hardness of the metal ceramic plate obtained after tempering, and the result is as follows: the Rockwell hardness HRC of the base material high-chromium cast iron is improved from 59-60 to 60-65.
By combining the embodiment, the preparation process of the metal ceramic plate and the metal ceramic plate disclosed by the invention have the advantages that the ceramic particles and the high-temperature metal liquid are mixed along with flow, and the liquid forging composite process is combined, the metal ceramic precast slab formed by injecting the metal ceramic mixed liquid into the cavity of the die is injected under pressure, and the ceramic particles are incident into the metal liquid to be mixed, so that the volume fraction of the ceramic particles in the metal ceramic plate is increased; compared with the common gravity method composite casting metal ceramic plate, the volume ratio of the ceramic in the metal is not more than 30%, and the volume fraction of the ceramic particles in the metal ceramic plate can reach 50% by pressure injection molding, and the ceramic particles are fully dispersed in the plate, and are uniformly dispersed in the metal, so that the agglomeration phenomenon is avoided. In addition, because the ceramic particles have initial speed when entering molten metal and are under the action of pressure stirring during liquid forging compounding, the wettability of the ceramic and the metal is improved, the wrapping property of the metal and the ceramic is enhanced, the combination of the ceramic particles and the metal is tighter, and the filling in a cavity is more in place and more compact.
Further carrying out a comparative impact test on metal in the metal ceramic plate prepared by the pressure injection process and common cast high-chromium cast iron, wherein an experimental result shows that the impact energy Ak value of a plate prepared by the common cast high-chromium cast iron is 5-7, the impact energy AK value of the metal in the metal ceramic plate obtained by the pressure injection process is 11-12, and a data result shows that the density and the strength of base metal obtained by the pressure injection process are obviously improved compared with those obtained by the common casting; namely, the metal ceramic plate is made of the ferrous metal, the process is simple and convenient, and the hardness, impact toughness and wear resistance of the product are obviously improved.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention should be determined by the appended claims.
Claims (8)
1. The preparation process of the metal ceramic plate is characterized by comprising the following steps of:
1) pretreating metal and ceramic particles and a mould: melting solid metal into molten metal, ceramic particles and respectively preheating a die;
2) mixing with the flow: guiding molten metal to a pressure chamber container of the mold by adopting a chute, injecting preheated ceramic particles into the molten metal flowing in the chute at a set speed, mixing the preheated ceramic particles with the molten metal along with flow, and then flowing into the pressure chamber container of the mold to form a metal ceramic mixed solution;
3) liquid forging compounding: closing the mold, moving the pressure device at the bottom of the pressure chamber container upwards, and pushing the metal ceramic mixed liquid to instantaneously fill the cavity along an ingate which is arranged on the mold and communicated with the cavity of the mold in a pressure injection fluid mode;
4) solidifying metal, maintaining pressure and feeding: within a set duration, the pressure device keeps constant pressure, continuously injects the metal ceramic mixed liquid into the cavity under pressure, keeps the cavity full, and makes metal solidify and feed;
5) and (3) cooling and taking: releasing the pressure by a pressure device, cooling and solidifying the metal ceramic mixed liquid in the cavity within a set cooling time, opening the mold after the set cooling time is reached, and taking out the metal ceramic plate prefabricated part;
6) heat treatment of the metal ceramic plate prefabricated part: sequentially annealing, quenching and tempering the metal ceramic plate prefabricated part taken out of the die to obtain a metal ceramic plate with qualified mechanical property;
the ceramic particles preheated in the step 2) are placed in a particle sprayer with an opening at one side, the opening of the particle sprayer faces to the opening of the chute, and the spraying speed of the particle sprayer to the ceramic particles is not lower than 6 m/s.
2. The preparation process of a cermet plate as set forth in claim 1, wherein the ceramic particles in step 1) have a particle size of 1.5mm to 3mm and the preheating temperature of the ceramic particles is 900 ℃; the preheating temperature of the die is 200-300 ℃.
3. A process for preparing a cermet plate as claimed in claim 2, characterised in that the chute is preheated before flow guiding, the preheating temperature being 900-1100 ℃.
4. The process for preparing a cermet plate according to claim 1, wherein the pressure device in step 3) is a plunger head sealingly connected to the inner wall of the plenum container, the plunger head having a freedom to move in the up-and-down direction inside the plenum container;
the process for injecting fluid under pressure by the plug injection head comprises the following steps: after the die is closed, the injection plug head moves upwards under the action of pressure to push the metal ceramic mixed liquid to fill the die cavity along the ingate instantaneously.
5. A process for preparing a cermet plate according to claim 1, characterised in that the opening of the ingate at the side of the cavity in step 3) is provided in a sector shape.
6. A manufacturing process of a cermet plate according to claim 1, characterised in that the duration set in step 4) is 5min and the pressure means maintains a constant pressure of 120 MPa.
7. A manufacturing process of a cermet plate according to claim 1, characterized in that the heat treatment process of the preform of the cermet plate in step 6) is: annealing at 980 ℃ for 6h, cooling to 500 ℃ with the furnace, discharging and air cooling; quenching at 1000 ℃ for 6h, discharging and air cooling to 200 ℃; tempering for 16h at 350 ℃, discharging and air cooling.
8. A process for the preparation of a cermet plate as claimed in claim 1, characterised in that said metal is a ferrous metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910982936.1A CN110695331B (en) | 2019-10-16 | 2019-10-16 | Preparation process of metal ceramic plate and metal ceramic plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910982936.1A CN110695331B (en) | 2019-10-16 | 2019-10-16 | Preparation process of metal ceramic plate and metal ceramic plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110695331A CN110695331A (en) | 2020-01-17 |
| CN110695331B true CN110695331B (en) | 2021-08-31 |
Family
ID=69199687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910982936.1A Active CN110695331B (en) | 2019-10-16 | 2019-10-16 | Preparation process of metal ceramic plate and metal ceramic plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110695331B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6457962A (en) * | 1987-08-26 | 1989-03-06 | Kubota Ltd | Composite member for continuous casting |
| CN104475698B (en) * | 2014-11-14 | 2016-08-24 | 北京交通大学 | A kind of liquid forging method of many areas exerted pressure on |
| CN105817599A (en) * | 2016-04-26 | 2016-08-03 | 安徽纯启动力机械有限公司 | Die casting technology for shrinkage-prevention die casting |
| CN109382492B (en) * | 2018-12-05 | 2021-01-26 | 昆明理工大学 | Method and device for continuously preparing particle-reinforced metal matrix composite material |
-
2019
- 2019-10-16 CN CN201910982936.1A patent/CN110695331B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110695331A (en) | 2020-01-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100509213C (en) | Vacuum solid type cast penetrated method for preparing particle reinforced metal-base surface composite material | |
| CN100439279C (en) | Formula of caput of composition type stopper | |
| CN109482813B (en) | WCp/EPS lost foam pattern and WCp/Fe composite material preparation | |
| CN102430743A (en) | Method for preparing surface-layer composite by using cast-infiltration method | |
| CN109128005B (en) | Metal framework toughened ceramic composite material and preparation method and application thereof | |
| CN103785841A (en) | Manufacturing method for composite wear-resistant parts formed by slurry coating surface activation ZTA particles and reinforced iron matrixes | |
| CN110976881B (en) | MIM (metal-insulator-metal) manufacturing process of 17-4PH linear multi-cavity energy-containing fragment shell | |
| CN113073248A (en) | WC prefabricated body structure reinforced iron-based composite material and preparation method thereof | |
| CN109049267B (en) | Ti-Fe micro powder coated multi-channel ceramic preform and preparation method and application thereof | |
| CN1408494A (en) | Composite material producing extruding-casting, permeating and sintering process and equipment | |
| CN102452123B (en) | Ceramic body and forming method thereof, and ceramic product | |
| CN114012070A (en) | Preparation method of hollow ceramic ball reinforced metal matrix composite material and composite material | |
| CN110695331B (en) | Preparation process of metal ceramic plate and metal ceramic plate | |
| CN102676956B (en) | Method for preparing iron-based surface composite material by virtue of in-situ synthesis | |
| CN101892398B (en) | Method for preparing ceramic/aluminum alloy gradient composite material | |
| CN107214343B (en) | Preparation method of gradient nozzle | |
| CN109663900A (en) | A kind of steel-based composite plate hammer and preparation method thereof | |
| CN113718156A (en) | Preparation method of WC particle reinforced iron-based composite material with three-dimensional prefabricated body structure | |
| CN102557692A (en) | Carbon-free sliding surface tundish water feed port and preparation method thereof | |
| CN1206069C (en) | Press filtering process to form functional gradient material in static magnetic field | |
| KR100653161B1 (en) | Pressure-casting method of semisolid Al matrix composite | |
| WO2021072674A1 (en) | Preparation process for metal ceramic plate, and metal ceramic plate | |
| CN109402443A (en) | A kind of steel-based composite wear-resistant part and preparation method thereof | |
| CN105903924B (en) | A kind of preparation facilities and method of composite bar | |
| CN105382243B (en) | The preparation method of wear-resisting mill |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Preparation process of a metal ceramic plate and metal ceramic plate Effective date of registration: 20230616 Granted publication date: 20210831 Pledgee: Anhui Ma'anshan Rural Commercial Bank Co.,Ltd. Pledgor: Anhui Chenguang high wear resistant Technology Co.,Ltd. Registration number: Y2023980044449 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |