AU2017279585A1 - A type of ceramic composite tooth on roller crushers and its preparation method - Google Patents

A type of ceramic composite tooth on roller crushers and its preparation method Download PDF

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AU2017279585A1
AU2017279585A1 AU2017279585A AU2017279585A AU2017279585A1 AU 2017279585 A1 AU2017279585 A1 AU 2017279585A1 AU 2017279585 A AU2017279585 A AU 2017279585A AU 2017279585 A AU2017279585 A AU 2017279585A AU 2017279585 A1 AU2017279585 A1 AU 2017279585A1
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ceramic
tooth
roller tooth
ceramic blocks
roller
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AU2017279585B2 (en
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Haotian Shi
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Handan Shiwei New Materials Co Ltd
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Handan Shiwei New Mat Co Ltd
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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
    • 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
    • B22D19/0036—Casting in, on, or around objects which form part of the product gears

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Crushing And Grinding (AREA)

Abstract

Translation from Chinese The Abstract of Description The present invention discloses a type of ceramic composite tooth on roll crushers, which comprises the body of the roller tooth, ceramic blocks and a wear-resistant alloy layer, where the said ceramic blocks are cast in on the top surface of the roller tooth and on the front and rear sides of the roller tooth, the outer surface of the said ceramic blocks protrudes beyond the surface of the said roller tooth body, and the wear-resistant alloy layer is overlay welded in the gaps between the said ceramic blocks and the said roller tooth body and to the remaining surfaces of the said roller tooth apart from its bottom and right sides. The preparation process of the ceramic composite tooth on roll crushers is Preparation of ceramic blocks - Preparation of sand mould - Casting - Shakeout - Overlay welding Heat treatment. The present invention uses the above-mentioned ceramic composite tooth on roll crushers and its preparation method to produce roller teeth with high hardness, high wear resistance, corrosion resistance and high impact resistance, hence the service Iife of the roller tooth can be prolonged and labour intensity of workers can be reduced. CHINESE <-> ENGLISH VALID TO 4/10/2020 SIGNATURE: TRANSACTION DATE. CERTIFIED TRANSLATOR Translation from Chinese Drawings of the Description Figure 1 Figure 2

Description

The present invention discloses a type of ceramic composite tooth on roll crushers, which comprises the body of the roller tooth, ceramic blocks and a wear-resistant alloy layer, where the said ceramic blocks are cast in on the top surface of the roller tooth and on the front and rear sides of the rol ler tooth, the outer surface of the said ceramic blocks protrudes beyond the surface of the said roller tooth body, and the wear-resistant alloy layer is overlay welded in the gaps between the said ceramic blocks and the said roller tooth body and to the remaining surfaces of the said roller tooth apart from its bottom and right sides. The preparation process of the ceramic composite tooth on roll crushers is Preparation of ceramic blocks - Preparation of sand mould - Casting - Shakeout — Overlay welding - Heat treatment. The present invention uses the above-mentioned ceramic composite tooth on roll crushers and its preparation method to produce roller teeth with high hardness, high wear resistance, corrosion resistance and high impact resistance, hence the service life of the roller tooth can be prolonged and labour intensity of workers can be reduced.
Figure AU2017279585A1_D0001
Certified translator
Translation from Chinese
Drawings of the Description
1/2
2017279585 07 Feb 2018
Figure AU2017279585A1_D0002
Figure 1
Figure AU2017279585A1_D0003
Figure 2
Translation from Chinese
2017279585 07 Feb 2018
Description
A Type of Ceramic Composite Tooth on Roll Crushers and Its Preparation Method
Technical Field
The invention belongs to the technical field of a toothed roll crusher and in particular deals with a type of ceramic composite tooth on roll crushers and its preparation method.
Background Art
Toothed roll crusher is suitable for coal, metallurgy, mining, chemical engineering, building materials and other industries. It is also widely used in the crushing of coal in large-scale coal mines or coal preparation plants with waste rock. Toothed roll crushers are classified into single-roll, double- rot I and multiroll crushers according to the number of toothed rolls. Singleroll and double-roll crushers are most commonly used in production Single-roll crusher consists of a rotating toothed roll and an arc-shaped crushing plate, and double-roll crusher consists of two counter-rot.ating toothed rolls. When the toothed roll rotates, the roller teeth on the roller surface can bite the material and crush the material with high extrusion pressure and shearing force from the roller teeth. The crushed material is discharged from the
Translation from Chinese
2017279585 07 Feb 2018 bottom as the toothed roll rotates. Doubie-roll crusher has a very good crushing effect for the material with high viscosity and the material with lower density. The teeth on toothed roil crusher protrude outside, and engage in long-term contact and crushing with the material, hence the wear on the teeth can be very severe. When the wear on toothed roll becomes serious, the roll gap increases, which would affect the efficiency of the toothed roll crusher. The wear resistance of the roller teeth determines the work efficiency of the toothed roll crusher, and it also affects the service life of the toothed roll crusher to a large extent.
The traditional production method of toothed roll adopts the casting of the roll and the roller teeth as a whole which is then bolted to the roller shaft. The structure of toothed roll is complex, that is why the monoblock casting method is not only tedious in the manufacturing process but is also prone to defects. Apart from that, the roller tooth and the roll work in different ways and the performance they require are also different. The use of the monoblock casting method cannot meet the performance requirements from both the roller teeth and the roll at the same time. In order to overcome the defects of monoblock casting, the roll and the roller teeth are now manufactured separately. Due to the limited wear resistance of the cast alloy, the wear-resistant alloy is often overlay welded on the parts of the roller teeth that are subject to wear in order to improve the wear resistance of the tooth. However, it is difficult to avoid cracks and slag inclusions in the surfacing of the wear-resistant layer, which
Translation from Chinese
2017279585 07 Feb 2018 leads to the problems of wear-resistant layer cracking and falling off due to the cyclic stress. And the service life of the tooth is then reduced.
Content of the Invention
The purpose of the present invention is to provide a type of ceramic composite tooth on roll crushers and its preparation method to solve the problems of low wear resistance and short service lives of teeth on roll crushers.
To achieve the above object, the present invention provides a type of ceramic composite tooth on roll crushers, which comprises the body of the roller tooth, ceramic blocks and a wear-resistant alloy layer, where the ceramic blocks are cast in on the top surface of the roller tooth and the front and rear sides of the roller tooth, the outer surface of the ceramic block protrudes beyond the surface of the roller tooth body, and the wearresistant alloy layer is overlay welded in the gaps between the ceramic blocks and the roller tooth body and to the remaining surfaces of the roller tooth apart from its bottom and right sides
Preferably, the overlay weld width of the said wear-resistant alloy layer on the left side surface of the roller tooth is 20-40 mm.
Preferably, the wear-resistant alloy is nichrome and the thickness of the said wear-resistant alloy layer is 5 to 10 mm.
Translation from Chinese
2017279585 07 Feb 2018
Preferably, the said ceramic block is a cuboid with the length being 30-40 mm, the width being 13-17 mm and the height being 2228 mm.
Preferably, the gap between the said ceramic blocks is 8 to 13 mm, and the height of the said ceramic block protruding beyond the roller tooth body is 5 to 10 mm.
Preferably, the outer surface of the said ceramic block does not protrude from the outer surface of the said wear-resistant ai loy I ayer.
Preferably, the said roller tooth body comprises a first working surface, a second working surface and a third working surface, wherein the ceramic blocks on the said first working surface are symmetrical to the ceramic blocks on the said third working surface, and the spacing between the ceramic blocks on the said first working surface is not more than that of the ceramic blocks on the said second working surface.
Preferably, the horizontal distance between the central axes of the longitudinal section of the first ceramic biock and the second ceramic block on the said third working surface is 3 to 5 mm.
In addition to the above shapes and structures, the roller tooth body further comprises a roller tooth body of any shape, structure and size; the said ceramic block includes ceramic blocks of any shape, structure and size in addition to the above shapes, structures and sizes.
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2017279585 07 Feb 2018
The present invention also provides a preparation method of the ceramic composite tooth on roll crushers, including:
Step 1, preparing the ceramic blocks: Divide the ceramic into ceramic blocks of a desired shape and size, weld steel nails onto the surfaces of the ceramic blocks, and then clean the ceramic blocks and apply nickel supersaturated borax solution to the surface of the ceramic block with nickel: borax: water weight ratio being 1: 4: 5; dry the ceramic block for later use;
Step 2, preparing the sand mould: Bury the mould into the moulding flask, make the cavity, and after drying the ceramic blocks fix them in the sand mould with steel nails, wherein their positions correspond to the positions of the ceramic blocks in the cast; Step 3, casting: Before casting, the sand mould with the ceramic blocks fixed on it is heated to above 350 0 C with hot air, and the molten metal is poured into the heated sand mould at a pouring temperature of 1450-1550 ° C;
Step 4, shake-out: When the moulding flask cools to below 300 °C after the completion of the casting, dismantle the mould, shake out, and then remove the sticky sand from the casting surface, and cut the running and feeding system and the nails on the ceramic bIocks;
Step 5, overlay welding of wear-resistant layer: The wearresistant alloy layer is overlay welded in the gaps between the
Translation from Chinese
2017279585 07 Feb 2018 polished roller tooth body and the ceramic blocks and onto the front and rear sides and the left side of the roller tooth;
Step 6, heat treatment: The roller tooth overlay welded with the wear-resistant alloy layer is incubated at a temperature of 400 to 500 0 C for 2 to 3 hours for tempering heat treatment.
Therefore, after adopting the above-mentioned ceramic composite tooth on roll crushers and its preparation method, the present invention can solve the problems of low wear resistance and short service life of teeth on roll crushers. The benefit of the present invention lies in that the ceramic blocks with high hardness and wear resistance are cast in on the metal substrate of traditional roll crusher teeth, and the wear-resistant alloy layer is overlay welded in the gaps between the ceramic blocks and the metal substrate. This ensures the good toughness of the metal substrate of the tooth core on the toothed roll crusher and at the same time improves the wear resistance of the surface of the roller tooth. The roller teeth produced by the preparation method of the ceramic composite tooth on roll crushers according to the present invention have the advantages of high hardness, high wear resistance, corrosion resistance and high impact resistance, hence the service life of the roller tooth can be prolonged and labour intensity of workers can be reduced.
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings and the embodiments.
Translation from Chinese
2017279585 07 Feb 2018
Description of the Drawings
Figure 1 is the roller tooth structure diagram of an embodiment of the present invention: a type of ceramic composite tooth on roil crushers and its preparation method;
Figure 2 is the right view diagram of the roller tooth of an embodiment of the present invention: a type of ceramic composite tooth on roll crushers and its preparation method;
Figure 3 is an enlarged view of A in Figure 2 which is the drawing of the embodiment of the present invention: a type of ceramic composite tooth on roll crushers and its preparation method;
Figure 4 is the cross-sectional diagram of the roller tooth of an embodiment of the present invention: a type of ceramic composite tooth on roll crushers and its preparation method;
Drawing reference signs
1, the body of the roller tooth; 2, ceramic block; 3, wearresistant alloy layer; 4, the left side of the roller tooth; 5, the top surface of the roller tooth; 6, the first working surface; 7, the second working surface; 8, the third working surface; 9, the first ceramic block; 10, the second ceramic block.
Deta i I ed ImpIementat i on
In the following, the present invention will be further described with reference to the accompanying drawings. It should be noted
Translation from Chinese
2017279585 07 Feb 2018 that the following embodiments take the present technical solution as a premise, and provide a detailed implementation and a specific operation process. However, the protection scope of the present invention is not limited to the following embodiments.
Figure 1 is the roller tooth structure diagram of an embodiment of the present invention: a type of ceramic composite tooth on roll crushers and its preparation method; Figure 2 is the right view diagram of the roller tooth of an embodiment of the present invention: a type of ceramic composite tooth on roll crushers and its preparation method; Figure 3 is an enlarged view of A in Figure 2 which is the drawing of the embodiment of the present invention: a type of ceramic composite tooth on roll crushers and its preparation method; Figure 4 is the cross-sectional diagram of the roller tooth of an embodiment of the present invention: a type of ceramic composite tooth on roll crushers and its preparation method; As shown in Figure 1, Figure 2, Figure 3 and Figure 4, a type of ceramic composite tooth on roll crushers comprises the body of the roller tooth 1, the ceramic blocks 2 and a wearresistant alloy layer 3. The ceramic block 2 is a cuboid with the length being 30-40 mm, the width being 13-17 mm and the height being 22-28 mm. The ceramic blocks 2 are cast in on the top surface 5 of the roller tooth and the front and rear sides of the roller tooth. The length x width surface of the ceramic block 2 on the top surface 5 of the roller tooth serves as a wear surface. The length x height surface of the ceramic block 2 on the front and rear surfaces of the roller tooth serves as a wear surface.
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2017279585 07 Feb 2018
The wear surface of the ceramic block 2 protrudes out of the surface of the roller tooth body 1 with a height of 5 to 10 mm, preferably 8 mm. The wear-resistant alloy layer 3 is overlay welded in the gaps between the ceramic blocks 2 and the roller tooth body 1 and to the remaining surfaces of the roller tooth apart from its bottom and right sides. Preferably, the wearresistant alloy is nichrome. The thickness of overlay weld is 5 to 10 mm, preferably 8 mm. The overlay weld width of the wearresistant alloy layer 3 on the left side surface 4 of the roller tooth is 20-40 mm, preferably 30mm. Wear-resistant alloy layer 3 is overlay welded all over on the front and rear surfaces of the roller tooth. The roller tooth body 1 comprises a first working surface 6, a second working surface 7 and a third working surface 8, wherein the ceramic blocks 2 on the first working surface ό are symmetrical to the ceramic blocks 2 on the third working surface 8, and the spacing between the ceramic blocks 2 on the first working surface 6 is not more than that of the ceramic blocks 2 on the second working surface 7. The horizontal distance between the central axes of the first ceramic block 92 and the second ceramic block 102 on the first working surface 6 and on the third working surface 8 is 3 to 5 mm, This is because the top of the roller tooth is curved to a certain degree. The areas where the first working surface 6 and the third working surface 8 are close to the second working surface 7 exert shearing and pressing forces on the material during the process of the material being crushed hence experience more severe wear. The ceramic blocks 2 must be properly
Translation from Chinese
2017279585 07 Feb 2018 laid out there. When the horizontal distance between the central axes of the longitudinal sections of the first ceramic block 9 and the second ceramic block 10 is 3 to 5 mm, a better wear resistance can be ensured for this area. The spacing between the ceramic blocks 2 is 8-13 mm, the spacing between the ceramic blocks 2 on the first working surface 6 and the third working surface 8 is preferably 10 mm, and the spacing between the ceramic blocks 2 on the second working face 7 is preferably 10-12 mm. It is the top of the roller tooth which plays a major role in crushing during the working process of the tooth on roil crushers, and that is why the top of the tooth experiences more severe wear. In the present invention, the ceramic blocks 2 are cast in on all of the top surface 5 of the roller tooth and the ceramic blocks 2 are cast in only on the upper part of the front and rear sides of the roller tooth. The wear-resistant alloy layer 3 is overlay welded onto the lower part of the front and rear sides of the rol ler tooth and onto the upper part of the left side 4 of the roller tooth. While ensuring the service life of the roller teeth, it reduces the use of the ceramic blocks 2, simplifies the production process, and reduces the material cost.
Embodiment 1
The method for sand mould casting of the said ceramic composite tooth on roll crushers comprises:
Step 1: preparing the ceramic blocks. Divide the ceramic into cuboids with the length being 30-40 mm, the width being 13-1/ mm
Translation from Chinese
2017279585 07 Feb 2018 and the height being 22-28 mm. Weld steei nails onto the wear surfaces of the ceramic blocks 2, and then clean the ceramic blocks 2. Apply nickel supersaturated borax solution to the surface of the ceramic block 2 with nickel: borax: water weight ratio being 1: 4: 5. The addition of nickel powder to the borax can improve the wettability between the moi ten metal and the ceramic block 23 and increase the fluidity of the molten metal on the ceramic block 23. In this way, a good metallurgical bonding surface can be formed between the concave 1, the mantle 2 and the ceramic block 23, so as to avoid the formation of slag inclusions and pores. Dry the ceramic block 2 for later use.
Step 2: preparing the sand mould. Bury the mould into the moulding flask, make the cavity, and after drying the ceramic blocks 2 fix them in the sand mould with steel nails, wherein their positions correspond to the positions of the ceramic blocks 2 in the cast. The steel nails play a role to fix the ceramic blocks 2 to prevent the ceramic blocks 2 from being displaced during casting. Apply high temperature coating in the cavity, and place the cavity in the furnace to dry for later use.
Step 3, Casting. Carry out the proportioning smelting according to the composition requirement of the roller tooth. Before casting, the sand mould with the ceramic blocks 2 fixed on it is heated to above 350 ° C with hot air, and then assemble the mould. The molten metal is poured into the heated cavity to complete the casting. The pouring temperature of the molten metal should be
Translation from Chinese
2017279585 07 Feb 2018 maintained between 1450 to 1550 ° C. Heating the sand mould with hot air before casting can eliminate the moisture in the cavity, reduce the temperature difference between the molten metal and the ceramic block 2, and reduce the condensation speed of the molten metal at the interface of the ceramic block 2. Therefore, when the high-temperature metal liquid flows into the cavity and contacts with the heated ceramic block 2, the interface does not generate cold shut defects. The ceramic block 2 absorbs heat from the hightemperature liquid metal to make the ceramic block 2 at the interface become molten. The hard particles and the binder phase molecules in the surface layer of the ceramic block 2 interdiffuse with the high-temperature liquid metal molecules and after cooling, a metallurgical bonding layer is formed between the roller tooth body 1 and the ceramic blocks 2. The metallurgical bonding layer ensures the bonding strength of the roller tooth body 1 and the ceramic blocks 2.
Step 4, Shake-out. When the moulding flask cools to below 300 3C after the completion of the casting, dismantle the mould, shake out, obtain the ceramic composite roller tooth, and then cut the running and feeding system and the steel nails on the ceramic blocks 2. Remove the sticky sand from the surface of the roller tooth, and polish the surface of the roller tooth smooth.
Step 5, overlay welding of the wear-resistant layer. The wearresistant alloy layer 3 is overlay welded in the gaps between the polished roller tooth body 1 and the ceramic blocks 2 and onto the
Translation from Chinese
2017279585 07 Feb 2018 front and rear sides and the left side 4 of the roller tooth. The overlay welding of wear-resistant alloy layer 3 cannot be continuous welding. The welding of the next layer in the area where the roller tooth needs to build up the wear-resistant alloy layer 3 can only start when the previous layer is completed, and this process continues until the completion of the wear-resistant alloy Iayer 3.
Step 6, heat treatment. The roller tooth overlay welded with the wear-resistant alloy layer 3 is incubated at a temperature of 400 to 500 ° C for 2 to 3 hours for tempering heat treatment. The purpose of tempering is to induce the precipitation of carbon atoms to improve the plasticity and toughness of the roller tooth and the wear-resistant alloy layer. This can eliminate the falling of the blocks under big impact from the brittleness of the wearresistant alloy layer 3 so that the roller tooth excels in both wear resistance and plasticity and toughness.
Embodiment 2
The method of lost foam casting can also complete the preparation of the said ceramic composite tooth on roll crushers. The difference between it and the sand mould casting method lies in that: when the sand mould is prepared, the holes matching the ceramic blocks 2 are cut at positions where the ceramic blocks 2 are distributed in the foam model of the roller tooth, and ceramic blocks 2 are placed in the holes; no need to preheat the moulding
Translation from Chinese
2017279585 07 Feb 2018 flask when casting, and the molten metal is directly poured into the moulding flask.
In addition to the shape and structure of the roller tooth body as described in the above embodiment, a roller tooth body of any shape, structure and size is also included. In addition to the above shapes, structures and sizes, the ceramic block includes ceramic blocks of any shape, structure and size.
Therefore, the present invention adopts the above-mentioned ceramic composite tooth on roll crushers and its preparation method: a type of ceramic material with high hardness and high wear resistance is inlaid on the roller tooth metal substrate and a wear-resistant alloy layer 3 is overlay welded on the outer surface of the roller tooth. This greatly increases the hardness and resistance of the tooth on roll crushers and therefore its service life is increased.
The ceramic composite tooth on roll crushers prepared by the above-mentioned preparation method has a good metallurgical bonding surface between the ceramic blocks 2 and the metal substrate, and no defects such as slag inclusion and pores exist. The roller teeth produced by the preparation method of the ceramic composite tooth on roll crushers according to the present invention have the advantages of high hardness, high wear resistance, corrosion resistance and high impact resistance, hence the service life of the roller tooth can be prolonged and labour intensity of workers can be reduced. Its service life is 1.5 to
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2017279585 07 Feb 2018
1.7 times of the roller tooth with only the wear-resistant alloy layer 3 overlay welding.
Finally, it should be noted that the foregoing embodiments are merely intended for describing the technical solutions of the present invention rather than limiting the present invention, Although the present invention is described in detail with reference to the preferred embodiments, It should be understood by those of ordinary skill in the art that the technical solutions of the present invention can be modified or equivalently substituted, and these modifications or equivalent substitutions cannot make the modified technical solutions depart from the spirit and scope of the technical solutions of the present invention.
Translation from Chinese
2017279585 07 Feb 2018

Claims (10)

  1. The Claims
    1. The features of a type of ceramic composite tooth on roll crushers are: the body of the roller tooth (1), ceramic blocks (2) and a wear-resistant alloy layer (3) are included; the said ceramic blocks (2) are cast in on the top surface of the rol ler tooth (5) and on the front and rear sides of the roller tooth, the outer surface of said ceramic blocks (2) protrudes beyond the surface of the said roller tooth body (1), and the wear-resislant alloy layer (3) is overlay welded in the gaps between the said ceramic blocks (2) and the said roller tooth body (1) and to the remaining surfaces of the said roller tooth apart from its bottom and right sides.
  2. 2. According to Claim 1, wherein a type of ceramic composite tooth on roll crushers is characterized in that: The overlay weld width of the wear-resistant alloy layer (3) on the left side surface ¢4) of the roller tooth is 20-40 mm.
  3. 3. According to Claim 1, wherein a type Df ceramic composite tooth on roll crushers is characterized in that: the wear-resistant alloy is nichrome and the thickness of the wear-resistant alloy layer is 5 to TO mm.
  4. 4. According to Claim 1, wherein a type of ceramic composite tooth on roll crushers is characterized in that: The ceramic block (2) is a cuboid with the length being 30-40 mm, the width being 13-17 mm and the height being 22-28 mm.
    Translation from Chinese
    2017279585 07 Feb 2018
  5. 5. According to Claim 1, wherein a type of ceramic composite tooth on roll crushers is characterized in that: The gap between the ceramic blocks (2) is 8 to 13 mm, and the height of the ceramic block (2) protruding beyond the roller tooth body (1) is 5 to 10 mm.
  6. 6. According to Claim 1, wherein a type of ceramic composite tooth on roll crushers is characterized in that: The outer surface of the ceramic block (2) does not protrude from the outer surface of the wear-resistant alloy layer (3).
  7. 7. According to Claim 1, wherein a type of ceramic composite tooth on roll crushers is characterized in that: The roller tooth body (1) comprises a first working surface (6), a second working surface (7) and a third working surface (8), wherein the ceramic blocks (2) on the first working surface (6) are symmetrical to the ceramic blocks (2) on the third working surface (8), and the spacing between the ceramic blocks (2) on the first working surface (6) is not more than that of the ceramic blocks (2) on the second working surface (7).
  8. 8. According to Claim 7, wherein a type of ceramic composite tooth on roll crushers is characterized in that: The horizontal distance between the central axes of the longitudinal section of the first ceramic block (9) and the second ceramic block (10) on the third working surface (8) is 3 to 5 mu.
    Translation from Chinese
    2017279585 07 Feb 2018
  9. 9. According to Claim 1 to 8, wherein a type of ceramic composite tooth on roll crushers is characterized in that: In addition to the above shapes and structures, the roller tooth body further comprises a roller tooth body of any shape, structure and size; the ceramic block includes ceramic blocks of any shape, structure and size in addition to the above shapes, structures and sizes,
  10. 10. A preparation method of the ceramic composite tooth on roll crushers according to Claims 1 to 9 is characterized in that:
    Step 1, preparing the ceramic blocks: divide the ceramic into ceramic blocks (2) of a desired shape and size, weld steel nails onto the surfaces of the ceramic blocks {2), and then clean the ceramic blocks (2) and apply nickel supersaturated borax solution to the surface of the ceramic block (2) with nickel: borax: water weight ratio being 1: 4: 5; dry the ceramic block {2) for later use;
    Step 2, preparing the sand mould: bury the mould into the moulding flask, make the cavity, and after drying the ceramic blocks (2) fix them in the sand mould with steel naiis, wherein their positions correspond to the positions of the ceramic blocks {2) in the cast;
    Step 3, casting: before casting, the sand mould with the ceramic blocks (2) fixed on it is heated to above 350 ° C with hot air, and the molten metal is poured into the heated sand mould at a pouring temperature of 1450-1550 ΰ C;
    Translation from Chinese
    2017279585 07 Feb 2018
    Step 4, shake-out: when the moulding flask cools to below 300 °C after the completion of the casting, dismantle the mould, shake out, and then remove the sticky sand from the casting surface, and cut the running and feeding system and the nails on the ceramic blocks (2);
    Step 5, overlay welding of wear-resistant layer: the wearresistant alloy layer (3) is overlay welded in the gaps between the polished roller tooth body (1) and the ceramic blocks (2) and onto the front and rear sides and the left side (4) of the roller tooth;
    Step 6, heat treatment: the roller tooth overlay welded with the wear-resistant alloy layer (3) is incubated at a temperature of 400 to 500 ° C for 2 to 3 hours for tempering heat treatment.
    Translation from Chinese
    1/2
    2017279585 07 Feb 2018
    Drawings of the Description
    Figure 2
    Translation from Chinese
    2/2
    2017279585 07 Feb 2018
    Figure 3
    CHENG GU CPN3EX7BB
    CHINESE <-> ENGLISH
    VALID TO 4/10/2020
    TRANSLATION OATE:
    CERTIFIED TRANSLATOR
    Figure 4
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CN113718175B (en) * 2021-09-02 2022-10-11 常熟市电力耐磨合金铸造有限公司 Metal ceramic inlaid composite roller
CN114411156B (en) * 2022-01-21 2024-03-19 中国矿业大学 Preparation method of wear-resistant casting for complex conditions and wear-resistant casting
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CN108201923B (en) 2019-10-18
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