CN114570481A - High-chromium cast iron-based ZTA ceramic composite material impact crusher plate hammer and manufacturing method thereof - Google Patents
High-chromium cast iron-based ZTA ceramic composite material impact crusher plate hammer and manufacturing method thereof Download PDFInfo
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- CN114570481A CN114570481A CN202210118583.2A CN202210118583A CN114570481A CN 114570481 A CN114570481 A CN 114570481A CN 202210118583 A CN202210118583 A CN 202210118583A CN 114570481 A CN114570481 A CN 114570481A
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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
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/26—Details
- B02C13/28—Shape or construction of beater elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
- B22C9/046—Use of patterns which are eliminated by the liquid metal in the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
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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
- B22F3/10—Sintering only
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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
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
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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
- B22F3/24—After-treatment of workpieces or articles
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- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/78—Combined heat-treatments not provided for above
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- Food Science & Technology (AREA)
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- Powder Metallurgy (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
The invention discloses a high-chromium cast iron based ZTA ceramic composite material impact crusher plate hammer and a manufacturing method thereof, wherein the method comprises the following steps: manufacturing a rigid metal mold; filling the first area and the second area with the high-chromium cast iron-ZTA mixed powder, and filling the third area with the high-chromium cast iron mixed powder; covering a top plate of the metal mold on the cavity, and pressurizing the top plate to form the high-chromium cast iron mixed powder and the high-chromium cast iron-ZTA mixed powder to obtain a powder forming body; putting the powder forming body into a box-type furnace, heating and drying to form a composite board hammer powder forming body; and (3) placing the composite board hammer powder model body into an atmosphere furnace for heating, sintering and densification molding to obtain the integral wear-resistant board hammer with the structure body and the wear-resistant striking body metallurgically combined. The invention successfully manufactures the high-chromium cast iron composite material impact crusher plate hammer with the working surface in dispersion distribution ZTA, the whole plate hammer obtains the densification structure and performance, and the working surface ZTA is tightly combined with the high-chromium cast iron to obtain the ultrahigh wear resistance.
Description
Technical Field
The invention belongs to the field of crushing of mineral engineering machinery, and particularly relates to a manufacturing method of a high-strength high-abrasion-resistance impact crusher plate hammer.
Background
The impact crusher plate hammer is a key part installed in a continuous crushing workstation, and is used for crushing demolished objects of mines, buildings and road facilities. The plate hammer of the impact crusher bears the impact, shearing and abrasion of crushed objects, martensite steel and high-chromium cast iron are applied to a certain extent in the manufacturing process of adopting integral materials, and the manufacturing of the ceramic composite plate hammer is developed at present in view of the insufficient service life.
The invention patent CN103769562B 'preparation method of an active element sintered ZTA particle reinforced steel-based composite hammer head' uses metal elements such as Ni, Cr and the likeMixing elements, 70-80% ZTA and borax solution, pressing into a honeycomb-shaped mold, drying, sintering, molding, embedding into a mold, and pouring alloy molten steel or cast iron liquid to obtain the wear-resistant hammer head; the invention patent CN109513905B "a method for preparing a surface treatment ZTA particle reinforced steel-based composite wear-resistant part" adopts magnetron sputtering and chemical plating to plate Cr and Ni on the ZTA surface, mixes with Ni, Al and Cr powder and presses into a graphite mold, sinters a honeycomb-shaped prefabricated body in vacuum, and casts and infiltrates to form the composite wear-resistant part after being pre-buried; the invention patent 103785841B relates to a method for preparing a slurry coating ZTA-reinforced steel-based composite wear-resistant part, which comprises preparing slurry from active metals Ni and Cr, polyethylene glycol, carboxymethyl cellulose, borax solution, etc., coating the slurry on the surface of ZTA, drying, pressing slurry-coated and dried ZTA particles into a graphite mold, vacuum sintering to obtain a honeycomb preform, and pre-embedding casting and infiltration to obtain the wear-resistant part. The invention patent 109053215A "preparation method of cellular ZTA ceramic preform coated with Fe-Cr-Ni-Ti micropowder" mixes several elementary metal powders, adds ZTA, water glass and paraffin, mixes them and presses them into mould, and introduces CO2Solidifying the gas into a prefabricated body, and forming the wear-resistant part by a cast-infiltration method. In the preparation process of all ZTA composite wear-resistant parts, ZTA, metal powder and an adhesive are mixed and pressed into a mold, solidified or sintered in vacuum to form a ZTA preform, and then the wear-resistant parts are prepared by a pre-embedding-cast infiltration method.
The invention relates to a plate hammer of a reaction crusher, which is aimed for being pursued by scientific researchers.
Disclosure of Invention
In view of the problems of short service life, low crushing efficiency, abrasion, breakage and the like in the crushing working process of the existing various impact crusher plate hammers, the invention aims to provide the impact crusher plate hammer made of the high-chromium cast iron-based ZTA ceramic composite material and the manufacturing method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a high chromium cast iron base ZTA ceramic composite material counterattack formula breaker bar, includes the structure and is located the wear-resisting body of hitting of structure both sides, forms integral wear-resisting bar with metallurgical bonding between structure and the wear-resisting body of hitting, the structure is high chromium cast iron, two side wear-resisting bodies of hitting are high chromium cast iron-ZTA composite construction that ZTA granule is dispersion distribution.
A manufacturing method of a high-chromium cast iron-based ZTA ceramic composite material impact crusher plate hammer comprises the following steps:
step S1, manufacturing a rigid metal mold, wherein the rigid metal mold comprises a bottom plate, a first side plate, a second side plate, a first panel, a second panel and a top plate, the bottom plate, the first side plate, the second side plate, the first panel and the second panel enclose to form a cavity, a first grid plate and a second grid plate are arranged in the cavity, a first area is formed among the bottom plate, the first side plate and the first grid plate, a second area is formed among the bottom plate, the second side plate and the second grid plate, and a third area is formed among the bottom plate, the first grid plate and the second grid plate;
step S2, filling the first area and the second area with the high-chromium cast iron-ZTA mixed powder, and filling the third area with the high-chromium cast iron mixed powder;
step S3, covering the top plate of the metal mold on the cavity, and pressurizing the top plate to form the high-chromium cast iron mixed powder and the high-chromium cast iron-ZTA mixed powder to obtain a powder forming body;
step S4, putting the powder molded body obtained in the step S3 into a box furnace, heating and drying to form a composite board hammer powder molded body;
and step S5, putting the dry plate hammer powder model body obtained in the step S4 into an atmosphere furnace for heating, sintering and densification forming to obtain the integral wear-resistant plate hammer with the structure body and the wear-resistant striking body metallurgically bonded.
In step S1, the first grid plate and the first grid plate of the rigid metal mold have a thickness not greater than 1mm and a mesh not greater than 2mm, and are made of high-carbon high-chromium steel.
In the step S2, the high-chromium cast iron mixed powder is obtained by the steps of: adding NaNO into high-chromium cast iron alloy powder2And Na2SiO3After being uniformly mixed, the mixed aqueous solution is dried to obtain high-chromium cast iron mixed powder; wherein the granularity of the high-chromium cast iron alloy powder is 100-300 meshes, the addition amount of the mixed aqueous solution is 20-100mL/kg of the high-chromium cast iron alloy powder, and NaNO is contained in the mixed aqueous solution2The mass concentration of (A) is 10-20%, Na2SiO3The mass concentration of (A) is 20-50%.
In the step S2, the high-chromium cast iron-ZTA mixed powder is obtained by the following steps: according to the mass percentage, 45.0-70.0% of ZTA, 0.5-4.5% of pellet binder, 1.5-3.5% of silicate solution and the balance of high chromium cast iron powder are fully and uniformly mixed by a mixer and dried to obtain the high chromium cast iron-ZTA mixed powder.
In the step S3, the top plate pressure is 20 to 100 Mpa.
In the step S4, the drying temperature is 100 ℃ and 140 ℃, and the drying time is 10min for each mm of thickness increase in the direction of the minimum cross-sectional dimension.
In the step S4, heating up and densifying and forming at the speed of 6-12 ℃/min and at the speed of 1-2Mpa/min, respectively preserving heat at 600 ℃ and 900 ℃ for 0.5h, and at the sintering temperature of 980-.
The plate hammer of the impact crusher is dispersed and distributed on a high-chromium cast iron matrix in ZTA particles at the first area and the second area on both sides, and the ZTA particles are tightly wrapped by the high-chromium cast iron.
The integral wear-resistant plate hammer for metallurgical bonding of the structure body and the wear-resistant striking body is used for heating, annealing and processing the assembly surface at 980 ℃ and 1100 ℃, heating and quenching at 980 ℃ and 1100 ℃, and heating and annealing at 400 ℃ and 550 ℃ to be in a final state
The abrasion resistance of the working surface of the plate hammer of the impact crusher made of the high-chromium cast iron-based ZTA ceramic composite material is more than 4-5 times of that of the high-chromium cast iron substrate.
The strength of the high-chromium cast iron-based ZTA ceramic composite material impact crusher plate hammer base body is more than 2 times of that of the high-chromium cast iron which is cast by the same material.
The high-chromium cast iron-based ZTA ceramic composite material impact crusher plate hammer can meet the requirements of complex working environment, and different parts of an integral material impact crusher plate hammer part have special mechanical properties.
The invention has the beneficial effects that: the invention provides a manufacturing method of a high-chromium cast iron based ZTA ceramic composite material impact crusher plate hammer, which is characterized in that the working surface of the plate hammer is obtained, ZTA particles are dispersed and distributed in high-chromium cast iron to form a complex body with metal and ceramic completely and tightly combined, and the bearing and supporting part is a comprehensive plate hammer structure of integral high-chromium cast iron, so that the special properties of different parts of the impact crusher plate hammer are obtained, and the customization requirements of complex working conditions on the impact crusher plate hammer are met. The manufacturing and strengthening principle of the impact crusher plate hammer is densification and pressure sintering molding. Compared with the traditional cast high-chromium cast iron plate hammer, the cast high-chromium cast iron plate hammer has the advantages of more compact material structure and more wear-resistant working surface. Compared with the traditional sintered ZTA preform and cast plate hammer, the working surface of the invention is more wear-resistant and has higher toughness, and brittle fracture and failure do not occur. Therefore, the impact crusher plate hammer base body has comprehensive mechanical properties, the working face has super-strong wear resistance, and the requirements of frequent crushing impact and wear operation are met.
Drawings
FIG. 1a is a schematic structural view of a rigid metal mold;
FIG. 1b is a top view of a rigid metal mold;
FIG. 2 is a ZTA dispersion distribution diagram of a working surface of a plate hammer of a high-chromium cast iron-based ZTA ceramic composite material impact crusher.
Detailed Description
The invention is further explained below with reference to the drawings and the embodiments.
The invention relates to a high-chromium cast iron based ZTA ceramic composite material impact crusher board hammer, which comprises a structural body and wear-resistant impact bodies positioned on two sides of the structural body, wherein the structural body and the wear-resistant impact bodies are metallurgically combined to form an integral wear-resistant board hammer, the structural body is high-chromium cast iron, and the wear-resistant impact bodies on two sides are a high-chromium cast iron-ZTA composite structure with ZTA particles in dispersed distribution.
Examples
As shown in fig. 1a and 1b, the rigid metal mold used in this embodiment includes a bottom plate 1, a first side plate 2, a second side plate 3, a first panel 4, a second panel 5, and a top plate 6, the bottom plate 1, the first side plate 2, the second side plate 3, the first panel 4, and the second panel 5 enclose to form a cavity, a first grid plate 7 and a first grid plate 8 are disposed in the cavity, a first area 9 is formed between the bottom plate 1, the first side plate 2, and the first grid plate 7, a second area 10 is formed between the bottom plate 1, the second side plate 3, and the second grid plate 8, and a third area 11 is formed between the bottom plate 1, the first grid plate 7, and the second grid plate 8.
The thickness of the first grid plate 7 and the first grid plate 8 is 1mm, the mesh is 2mm, and the material is high-carbon high-chromium steel.
The manufacturing method of the high-chromium cast iron-based ZTA ceramic composite material impact crusher plate hammer of the embodiment comprises the following steps:
(1) manufacturing a rigid metal mold;
(2) filling the first area 9 and the second area 10 with the high-chromium cast iron-ZTA mixed powder, and filling the third area 11 with the high-chromium cast iron mixed powder;
the high-chromium cast iron mixed powder is obtained by the following steps: adding NaNO into high-chromium cast iron alloy powder2And Na2SiO3After being uniformly mixed, the mixed aqueous solution is dried to obtain high-chromium cast iron mixed powder; wherein the granularity of the high-chromium cast iron alloy powder is 200 meshes, the addition amount of the mixed aqueous solution is 60mL/kg of the high-chromium cast iron alloy powder, and NaNO is contained in the mixed aqueous solution2Has a mass concentration of 10% and Na2SiO3The mass concentration of (2) is 20%;
the high-chromium cast iron-ZTA mixed powder is obtained by the following steps: according to the mass percentage, 60.0 percent of ZTA, 4.5 percent of pellet binder, 3.5 percent of silicate solution and the balance of high-chromium cast iron powder are fully and uniformly mixed by a mixer and dried to obtain high-chromium cast iron-ZTA mixed powder;
(3) covering a top plate 6 of the metal mold on the cavity, and pressurizing the top plate 6 by 50Mpa to form the high-chromium cast iron mixed powder and the high-chromium cast iron-ZTA mixed powder to obtain a powder forming body;
(4) putting the powder molded body obtained in the step (3) into a box furnace, heating and drying at the drying temperature of 120 ℃ for 24 hours to form a composite plate hammer powder molded body;
(5) placing the dry plate hammer powder model body obtained in the step (4) into an atmosphere furnace for heating, sintering and densification forming to obtain an integral wear-resistant plate hammer with a structural body and a wear-resistant striking body which are metallurgically bonded;
heating sintering and densification forming are carried out according to the temperature rise speed of 10 ℃/min and the pressure rise speed of 2Mpa/min, heat preservation is carried out for 0.5h at the temperature of 600 ℃ and 900 ℃, the sintering temperature is 1180 ℃ and the sintering time is 1h, the gas in the furnace is kept at the positive pressure of 120Mpa in the process of cooling to 600 ℃ in the sintering period, then the temperature is reduced, the pressure is reduced, and finally the furnace is cooled to the room temperature, wherein the gas in the furnace is argon or nitrogen.
The plate hammers of the impact crusher are dispersedly distributed on the high-chromium cast iron matrix in ZTA particles at the first area 9 and the second area 10 at both sides, and the ZTA particles are tightly wrapped by the high-chromium cast iron.
The obtained structure body and the integral type wear-resistant plate hammer part metallurgically combined with the wear-resistant striking bodies on the two sides are heated and annealed at 1050 ℃ to process an assembly surface; quenching at 1050 deg.C, and tempering at 450 deg.C to obtain final product.
The method can also be used for manufacturing various wear-resistant parts such as cone crushers, impact crushers and the like.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A high chromium cast iron base ZTA ceramic composite material impact crusher plate hammer is characterized in that: the structure body is high-chromium cast iron, and the bilateral wear-resistant striking bodies are high-chromium cast iron-ZTA composite structures with ZTA particles in dispersion distribution.
2. A method of manufacturing a high chromium cast iron based ZTA ceramic composite impact crusher plate hammer as claimed in claim 1, characterized in that: the method comprises the following steps:
step S1, manufacturing a rigid metal mold, wherein the rigid metal mold comprises a bottom plate (1), a first side plate (2), a second side plate (3), a first panel (4), a second panel (5) and a top plate (6), the bottom plate (1), the first side plate (2), the second side plate (3), the first panel (4) and the second panel (5) are enclosed to form a cavity, a first grid plate (7) and a second grid plate (8) are arranged in the cavity, a first area (9) is formed among the bottom plate (1), the first side plate (2) and the first grid plate (7), a second area (10) is formed among the bottom plate (1), the second side plate (3) and the second grid plate (8), and a third area (11) is formed among the bottom plate (1), the first grid plate (7) and the second grid plate (8);
step S2, filling the first area (9) and the second area (10) with the high-chromium cast iron-ZTA mixed powder, and filling the third area (11) with the high-chromium cast iron mixed powder;
step S3, covering the top plate (6) of the metal mold on the cavity, and pressurizing the top plate (6) to mold the high-chromium cast iron mixed powder and the high-chromium cast iron-ZTA mixed powder to obtain a powder molding body;
step S4, putting the powder molded body obtained in the step S3 into a box furnace, heating and drying to form a composite board hammer powder molded body;
and S5, putting the composite board hammer powder model body obtained in the step S4 into an atmosphere furnace for heating, sintering and densification forming to obtain the integral wear-resistant board hammer with the structure body and the wear-resistant hitting body metallurgically bonded.
3. The method of manufacturing a high-chromium cast iron-based ZTA ceramic composite impact crusher plate hammer according to claim 2, wherein: in the step S1, the first grid plate (7) and the second grid plate (8) of the rigid metal mold have a thickness not greater than 1mm and a mesh not greater than 2mm, and are made of high-carbon high-chromium steel.
4. The method of manufacturing a high-chromium cast iron-based ZTA ceramic composite impact crusher plate hammer according to claim 2, wherein: in the step S2, the high-chromium cast iron mixed powder is obtained by the steps of: adding NaNO into high-chromium cast iron alloy powder2And Na2SiO3After being uniformly mixed, the mixed aqueous solution is dried to obtain high-chromium cast iron mixed powder; wherein the granularity of the high-chromium cast iron alloy powder is 100-300 meshes, the addition amount of the mixed aqueous solution is 20-100mL/kg of the high-chromium cast iron alloy powder, and NaNO is contained in the mixed aqueous solution2The mass concentration of the sodium hydroxide is 10-20 percent, and Na2SiO3The mass concentration of (A) is 20-50%.
5. The method of manufacturing a high-chromium cast iron-based ZTA ceramic composite material impact crusher plate hammer according to claim 2, wherein: in the step S2, the high-chromium cast iron-ZTA mixed powder is obtained by the following steps: according to the mass percentage, 45.0-70.0% of ZTA, 0.5-4.5% of pellet binder, 1.5-3.5% of silicate solution and the balance of high chromium cast iron powder are fully and uniformly mixed by a mixer and dried to obtain the high chromium cast iron-ZTA mixed powder.
6. The method of manufacturing a high-chromium cast iron-based ZTA ceramic composite impact crusher plate hammer according to claim 2, wherein: in the step S3, the top plate pressure is 20 to 100 Mpa.
7. The method of manufacturing a high-chromium cast iron-based ZTA ceramic composite impact crusher plate hammer according to claim 2, wherein: in the step S4, the drying temperature is 100 ℃ and 140 ℃, and the drying time is 10min for each mm of thickness increase in the direction of the minimum cross-sectional dimension.
8. The method of manufacturing a high-chromium cast iron-based ZTA ceramic composite impact crusher plate hammer according to claim 2, wherein: in the step S5, heating up and densifying and forming at the speed of 6-12 ℃/min and at the speed of 1-2Mpa/min, respectively preserving heat at 600 ℃ and 900 ℃ for 0.5h, and at the sintering temperature of 980-.
9. The method of manufacturing a high-chromium cast iron-based ZTA ceramic composite impact crusher plate hammer according to claim 1, wherein: the plate hammer of the impact crusher is dispersed and distributed on a high-chromium cast iron matrix in ZTA particles at the first region (9) and the second region (10) on both sides, and the ZTA particles are tightly wrapped by the high-chromium cast iron.
10. The method of manufacturing a high-chromium cast iron-based ZTA ceramic composite impact crusher plate hammer according to claim 1, wherein: the integral type wear-resistant plate hammer for metallurgical bonding of the structural body and the wear-resistant striking body is heated and annealed at the temperature of 980 and 1100 ℃ to process the assembly surface, is heated and quenched at the temperature of 980 and 1100 ℃, and is heated and annealed at the temperature of 400 and 550 ℃ to be in a final state.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114559039A (en) * | 2022-02-08 | 2022-05-31 | 徐州徐工矿业机械有限公司 | Iron-based ceramic preform with wear-resistant ceramic particles dispersed and distributed and manufacturing method thereof |
| CN114921708A (en) * | 2022-07-20 | 2022-08-19 | 昆明理工大学 | Preparation method of authigenic ZTA ceramic reinforced iron-based composite material |
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| CN114921708A (en) * | 2022-07-20 | 2022-08-19 | 昆明理工大学 | Preparation method of authigenic ZTA ceramic reinforced iron-based composite material |
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