CN113368959A - Wear-resistant structure without damaging parent and preparation method thereof - Google Patents
Wear-resistant structure without damaging parent and preparation method thereof Download PDFInfo
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- CN113368959A CN113368959A CN202110652034.9A CN202110652034A CN113368959A CN 113368959 A CN113368959 A CN 113368959A CN 202110652034 A CN202110652034 A CN 202110652034A CN 113368959 A CN113368959 A CN 113368959A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/30—Shape or construction of rollers
- B02C4/305—Wear resistant rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/56—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.7% by weight of carbon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
Abstract
The invention discloses a wear-resistant structure without damaging a parent body, which comprises a transition layer built-up welding on the parent body, wherein circular holes with the depth smaller than the thickness of the transition layer and incomplete and consistent depth are processed in the transition layer, and welding wear-resistant studs are built-up welding in the circular holes. The transition layer has good toughness and processing performance, and round holes are formed on the transition layer and are not easy to crack; the transition layer with good toughness is matched with the welding wear-resistant stud with high strength and good wear resistance to form a soft and hard staggered structure, so that the impact stress of hard materials on the wear-resistant structure is relieved; the welding wear-resistant stud is not directly contacted with the parent body, so that the direct damage to the parent body can be effectively reduced; the outer height of the welded wear-resistant stud is consistent but discontinuous, and the problem that a continuous wear-resistant alloy layer formed by welding the wear-resistant alloy on a matrix is prone to cracking is effectively solved. The invention also discloses a preparation method of the wear-resistant structure, which effectively prolongs the service cycle of the wear-resistant structure, protects the matrix from being damaged and improves the wear resistance.
Description
Technical Field
The invention relates to a wear-resistant structure, in particular to a wear-resistant structure which does not damage a parent body and a preparation method thereof.
Background
At present, the wear-resistant structure is widely applied to metallurgy, chemical industry, mines and coal industry, and has the characteristics of energy conservation, consumption reduction and high automation degree. The wear-resistant structure is applied to a powder production line for graded scattering, and the production effect of a subsequent ball mill can be improved. Common roll squeezer, antifriction plate etc. all relate to the installation and the use of wear-resisting structure. After the roller press and the wear-resisting plate are installed and used, the wear-resisting layer on the surface of the female body is worn almost without working for a period of time, the roller surface wear limits the exertion of the advantages, the yield is greatly reduced, and the production cost is increased. The materials are mutually rubbed and extruded between the roller surfaces/planes, and the abrasion of the roller surfaces of the materials under the action of high pressure belongs to typical high-stress abrasive material abrasion. In the process of abrasive wear, the materials enable the contact surface to generate elastic and plastic deformation under the action of pressure, so that cyclic tensile stress and compressive stress are formed on the contact surface. When the cyclic stress exceeds the fatigue strength of the wear layer, the wear layer will crack. Under the action of cyclic load, the plastic deformation of the wear-resistant layer can continue to develop, and cracks can also be initiated at a position away from the surface layer by a certain depth and gradually expand. When the crack propagates, the material above the crack will break and peel off, resulting in fatigue wear.
The existing wear-resistant structure mostly adopts a mode of installing a wear-resistant stud on a parent body to prolong the service life, and the wear-resistant stud and the parent body generally adopt a mode of interference fit or directly overlaying a wear-resistant alloy layer on the parent body, but the combination mode has the following problems: if adopt interference fit when installing wear-resisting piece, the mounting hole on the equipment is the spalling easily under the effect of instantaneous force, causes the harm to equipment. When a mode of directly overlaying a wear-resistant alloy layer on a matrix is adopted, because the wear-resistant layer material is high in hardness and poor in toughness, the overlaying height is generally controlled to be 5-6mm, and at most two layers are overlaid, so that the wear resistance is insufficient; however, the overlaying welding is too thick, the abrasion-resistant overlaying welding layer is easy to peel off in a large area, and the using effect is seriously influenced. How to solve the above problems is a urgent task for researchers in the field.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a wear-resistant structure which does not damage a parent body, can effectively protect the parent body from being worn, and greatly prolongs the service cycle of a structural member.
The second purpose of the invention is to provide a method for preparing a wear-resistant structure which does not damage the matrix.
One of the purposes of the invention is realized by adopting the following technical scheme:
a wear-resistant structure without damaging a parent body comprises a transition layer (2) and a welding wear-resistant stud (3);
the transition layer (2) is arranged on the outer surface of the matrix (1), round holes (2-1) are formed in the transition layer (2), and the depth of each two adjacent round holes (2-1) is different and is smaller than the thickness of the transition layer (2);
the axis of the round holes (2-1) is vertical to the surface of the transition layer (2), and the round holes (2-1) are distributed in a staggered manner;
the welding wear-resistant stud (3) is formed by overlaying a wear-resistant surfacing material in the round hole (2-1), the part of the welding wear-resistant stud (3) higher than the transition layer (2) is hemispherical, and the heights of the parts of the welding wear-resistant stud (3) higher than the transition layer (2) are consistent;
gaps are reserved between every two adjacent welding wear-resistant studs (3) on the transition layer (2).
Further, the thickness of the transition layer (2) is 30-50 mm.
Furthermore, the diameter of the round hole (2-1) is 10-40mm, and the depth of the hole is 20-40 mm.
Further, the shortest distance between two adjacent welding wear-resistant studs (3) is 2-10 mm.
Further, the transition layer (2) consists of the following components: 20-35 wt% of Cr, 8-15 wt% of Ni, 1.0-8.0 wt% of Mn, less than 0.2 wt% of C, less than 2.0 wt% of Si, less than 5.0 wt% of impurities and the balance of Fe.
Further, the welding wear-resistant stud (3) consists of the following components: cr 6-35 wt%, Ni less than 5.0 wt%, Mn 1.0-8.0 wt%, C1.5-5.5 wt%, Si less than 2.0 wt%, impurity less than 15.0 wt%, and Fe for the rest.
Further, the matrix (1) is a revolving body, a flat plate or other irregular-shaped members.
The second purpose of the invention is realized by adopting the following technical scheme:
the preparation method of the wear-resistant structure which does not damage the matrix comprises the following steps:
(1) uniformly overlaying a transition layer (2) on the surface of the matrix (1);
(2) forming a round hole (2-1) on the transition layer (2) in the step (1);
(3) and (3) surfacing and welding the wear-resistant stud (3) in the round hole (2-1) in the step (2) to complete the process.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides a wear-resistant structure without damaging a parent body, which comprises a transition layer which is formed by overlaying on the parent body, wherein round holes with the depth smaller than the thickness of the transition layer and incomplete and consistent depth are arranged in the transition layer; the transition layer with better toughness is matched with the welding wear-resistant stud with high strength and good wear resistance to form a soft and hard staggered structure, so that the impact stress of hard materials on the wear-resistant structure is favorably relieved; the welding wear-resistant stud is not in direct contact with the parent body, so that direct damage to the parent body can be effectively avoided.
2. The depth of the welding wear-resistant stud in the round hole is inconsistent, stress concentration is relieved, the parent body and the transition layer are effectively protected, and the cracking phenomenon is avoided.
3. The welding wear-resistant stud disclosed by the invention has the advantages that the exposed transition layer is consistent in height but discontinuous, and the problem that a continuous wear-resistant alloy sheet layer formed by welding wear-resistant alloy on a matrix is easy to crack is effectively solved.
4. According to the welding wear-resistant stud, the gap is formed between the welding wear-resistant studs, when the particle size of the material is equal to the size of the gap, the material is clamped, and the acting force between the material and the material can be formed between the clamped material and the next material, so that the fatigue damage of the material to the welding wear-resistant stud is relieved, and meanwhile, the material is crushed.
5. The invention also provides a preparation method of the wear-resistant structure, and by adopting the preparation method, the service cycle of the wear-resistant structure is greatly prolonged, the parent body is effectively protected from being damaged, the wear-resistant performance of the structure is improved, and the cost can be effectively saved.
Drawings
FIG. 1 is a top view of a wear-resistant structure that does not harm a mother body in embodiment 1 of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;
fig. 3 is a partial sectional view of a roller body of a wear-resistant structure which does not damage a parent body according to embodiment 1 of the present invention, the roller body being provided with a circular hole;
FIG. 4 is a cross-sectional view of a welded wear-resistant stud in accordance with embodiment 1 of the present invention;
in the figure: 1. a parent body; 2. a transition layer; 2-1, round holes; 3. and welding the wear-resistant stud.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
Example 1
A wear resistant structure that does not harm the parent body: comprises a transition layer 2 and a welding wear-resistant stud 3;
the transition layer 2 is arranged on the outer surface of the matrix 1, and the thickness is 50 mm; the transition layer 2 is provided with round holes 2-1, the axes of the round holes 2-1 are vertical to the surface of the transition layer 2 and are distributed in a staggered way, the center distance of the round holes 2-1 is 40mm, the diameter is 20mm, the hole depth is 20-40mm, and the depth of the round holes 2-1 is not completely consistent;
the welding wear-resistant stud 3 is arranged in the round hole 2-1, the part of the stud higher than the transition layer 2 is hemispherical, the diameter of the hemisphere is 30mm, and the height of the part of the stud higher than the transition layer 2 is consistent; gaps with the width of 10mm are reserved on the transition layer 2 among the welding wear-resistant studs 3.
The preparation method of the wear-resistant structure which does not damage the matrix comprises the following steps:
(1) and a transition layer 2 is uniformly overlaid on the surface of the matrix 1, and the thickness of the transition layer 2 is 50 mm. The alloy components of the transition layer 2 consist of the following elements in percentage by mass: 20 wt% of Cr, 15 wt% of Ni, 1.0 wt% of Mn, 0.1 wt% of C, 1.5 wt% of Si, less than 5.0 wt% of impurities and the balance of Fe.
(2) And (2) arranging round holes 2-1 with the diameter of 20mm in the transition layer 2 obtained in the step (1), wherein the hole depth is 20-40mm, and the hole depth of the round holes is not completely consistent.
(3) And (3) surfacing the wear-resistant alloy in the round hole 2-1 to form a welding wear-resistant stud 3, wherein the welding wear-resistant stud 3 is arranged in the round hole 2-1, the part higher than the transition layer 2 is hemispherical, and a gap with the width of 10mm is formed between the hemispheres of the welding wear-resistant stud 3, so that the process is completed. The wear-resistant alloy comprises the following elements in percentage by mass: 35 wt% of Cr, 4.0 wt% of Ni, 8.0 wt% of Mn, 5.5 wt% of C, 1.5 wt% of Si, less than 15.0 wt% of impurities and the balance of Fe.
Example 2
A wear resistant structure that does not harm the parent body: comprises a transition layer 2 and a welding wear-resistant stud 3;
the transition layer 2 is arranged on the outer surface of the matrix 1, and the thickness is 40 mm; the transition layer 2 is provided with round holes 2-1, the axes of the round holes 2-1 are vertical to the surface of the transition layer 2 and are distributed in a staggered way, the center distance of the round holes 2-1 is 65mm, the diameter is 30mm, the hole depth is 20-35mm, and the depth of the round holes 2-1 is not completely consistent;
the welding wear-resistant stud 3 is arranged in the round hole 2-1, the part of the stud higher than the transition layer 2 is hemispherical, the diameter of the hemisphere is 60mm, and the height of the part of the stud higher than the transition layer 2 is consistent; gaps with the width of 5mm are formed on the transition layer 2 among the welding wear-resistant studs 3.
The preparation method of the wear-resistant structure which does not damage the matrix comprises the following steps:
(1) and a transition layer 2 is uniformly overlaid on the surface of the matrix 1, and the thickness of the transition layer 2 is 40 mm. The alloy components of the transition layer 2 consist of the following elements in percentage by mass: 25 wt% of Cr, 8 wt% of Ni, 8.0 wt% of Mn, 0.1 wt% of C, 1.5 wt% of Si, less than 5.0 wt% of impurities and the balance of Fe.
(2) And (2) arranging a circular hole 2-1 with the diameter of 30mm in the transition layer 2 obtained in the step (1), wherein the hole depth is 20-35mm, and the hole depth of the circular hole 2-1 is not completely consistent.
(3) And (3) surfacing the wear-resistant alloy in the round hole 2-1 to form a welding wear-resistant stud 3, arranging the welding wear-resistant stud 3 in the round hole 2-1, and forming a gap with the width of 5mm between hemispheres of the welding wear-resistant stud 3, wherein the part of the welding wear-resistant stud 3, which is higher than the transition layer 2, is hemispherical. The wear-resistant alloy comprises the following elements in percentage by mass: 35 wt% of Cr, 3.0 wt% of Ni, 6.0 wt% of Mn, 2.0 wt% of C, 1.0 wt% of Si, less than 15.0 wt% of impurities and the balance of Fe.
Example 3
A wear resistant structure that does not harm the parent body: comprises a transition layer 2 and a welding wear-resistant stud 3;
the transition layer 2 is arranged on the outer surface of the flat plate 1, and the thickness of the transition layer is 50 mm; the transition layer 2 is provided with round holes 2-1, the axes of the round holes 2-1 are vertical to the surface of the transition layer 2 and are distributed in a staggered manner, the center distance of the round holes 2-1 is 47mm, the diameter is 35mm, the hole depth is 20-25mm, and the depths of the round holes 2-1 are not completely consistent;
the welding wear-resistant stud 3 is arranged in the round hole 2-1, the part of the stud higher than the transition layer 2 is hemispherical, the diameter of the hemisphere is 45mm, and the height of the part of the stud higher than the transition layer 2 is consistent; gaps with the width of 2mm are formed on the transition layer 2 among the welding wear-resistant studs 3.
The preparation method of the wear-resistant structure which does not damage the matrix comprises the following steps:
(1) and a transition layer 2 is uniformly overlaid on the surface of the flat plate 1, and the thickness of the transition layer 2 is 30 mm. The alloy components of the transition layer 2 consist of the following elements in percentage by mass: 35 wt% of Cr, 10 wt% of Ni, 6.0 wt% of Mn, 0.1 wt% of C, 1.0 wt% of Si, less than 5.0 wt% of impurities and the balance of Fe.
(2) And (2) arranging circular holes 2-1 with the diameter of 35mm in the transition layer 2 obtained in the step (1), wherein the hole depth is 20-25mm, and the hole depth of the circular holes is not completely consistent.
(3) And (3) surfacing the wear-resistant alloy in the round hole 2-1 to form a welding wear-resistant stud 3, arranging the welding wear-resistant stud 3 in the round hole, forming a 2mm wide gap between hemispheres of the welding wear-resistant stud 3, wherein the hemispheres are higher than the transition layer 2, and thus finishing. The wear-resistant alloy comprises the following elements in percentage by mass: 6 wt% of Cr, 1.0 wt% of Ni, 8.0 wt% of Mn, 1.5 wt% of C, 1.0 wt% of Si, less than 15.0 wt% of impurities and the balance of Fe.
Comparative example 1
Comparative example 1 differs from example 1 in that: a wear-resistant alloy layer with a thickness of 5mm was deposited directly on the roller body 1, wherein the composition of the wear-resistant alloy was the same as in example 1.
Comparative example 2
Comparative example 2 differs from example 1 in that: the transition layer 2 is omitted, and the round holes 2-1 are directly formed in the roller body 1, and the rest is the same as that in the embodiment 1.
Comparative example 3
Comparative example 3 differs from example 1 in that: the depth of two adjacent circular holes 2-1 is the same, and the rest is the same as that of the embodiment 1.
Comparative example 4
Comparative example 4 differs from example 1 in that: no gap is left between two adjacent welding wear-resistant studs 3, and the two adjacent welding wear-resistant studs are continuous on the transition layer 2. The rest is the same as in example 1.
Experimental example 1
And (3) carrying out mechanical property detection on the transition layer and the welding wear-resistant stud obtained in the embodiments 1 to 3, wherein each test method refers to the national standard. The results are shown in table 1:
TABLE 1
The roughness Ra of the transition layer obtained in examples 1 to 3 was controlled to be 12.5, and the elongation and the reduction of area were large, and the toughness was good. The Brinell hardness reaches 239-280HBW, the tensile strength reaches 650-700MPa, and the yield strength reaches 550-596MPa, so that the transition layer in the embodiment of the invention has the characteristics of moderate strength and hardness and good toughness. The alloy hardness of the welding wear-resistant stud nails obtained in the embodiments 1 to 3 of the invention is detected, and the result shows that the Rockwell hardness of the welding wear-resistant stud nails is 55 to 66HRC, so that the welding wear-resistant stud nails have the characteristic of high hardness.
The results of evaluating the use properties of the abrasion resistant structures obtained in examples 1 to 3 and comparative examples 1 to 4 are shown in Table 2.
TABLE 2
The wear-resistant structures obtained in the embodiments 1 to 3 of the invention have the service time of 15000-. The comparative example 1 is that a wear-resistant alloy layer is directly fused on the surface of a roller body, the thickness of the wear-resistant layer is 5mm, the wear-resistant alloy layer can be used for 3000 hours, and along with the service time of a structural member, the wear-resistant alloy layer is directly overlaid on the roller body to generate cracks and even fall off, and the matrix generates cracks. Comparative example 2 is that the round hole is directly arranged on the roller body, then the wear-resistant stud is welded in the round hole to obtain the wear-resistant structure, the time is 3100 hours, and in the service period of the structural member, the matrix is directly impacted by the material and the welded wear-resistant stud, so that the matrix is cracked. The depth of two adjacent round holes in the wear-resistant structure of the comparative example 3 is the same, the service time is 6500 hours, the structure can not buffer the matrix when receiving the impact from the material and the welding wear-resistant stud, and cracks appear on the matrix. The two adjacent welding wear-resistant studs of the comparative example 4 are continuous, the service time is 8000 hours, the continuous welding wear-resistant studs have cracks or even fall off on the surface layer along with the service time extension, the matrix has cracks, the wear resistance is reduced, and the service life of the structural member is seriously influenced. Therefore, the wear-resistant structure provided by the invention can effectively prolong the service life of the structural member without damaging the parent body.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (8)
1. The wear-resistant structure without damaging a parent body is characterized by comprising a transition layer (2) and a welding wear-resistant stud (3);
the transition layer (2) is arranged on the outer surface of the matrix (1), round holes (2-1) are formed in the transition layer (2), and the depth of each two adjacent round holes (2-1) is different and is smaller than the thickness of the transition layer (2);
the axis of the round holes (2-1) is vertical to the surface of the transition layer (2), and the round holes (2-1) are distributed in a staggered manner;
the welding wear-resistant stud (3) is formed by overlaying a wear-resistant surfacing material in the round hole (2-1), the part of the welding wear-resistant stud (3) higher than the transition layer (2) is hemispherical, and the heights of the parts of the welding wear-resistant stud (3) higher than the transition layer (2) are consistent;
gaps are reserved between every two adjacent welding wear-resistant studs (3) on the transition layer (2).
2. A matrix-friendly abrasion-resistant construction as claimed in claim 1, characterized in that said transition layer (2) has a thickness of 30-50 mm.
3. A matrix-sparing, abrasion-resistant structure as claimed in claim 1, wherein said circular holes (2-1) have a diameter of 10-40mm and a depth of 20-40 mm.
4. A matrix-sparing wear structure as claimed in claim 1, characterized in that the shortest distance between two adjacent welded wear studs (3) is 2-10 mm.
5. Parent-harmless abrasion-resistant structure according to claim 2, characterized in that said transition layer (2) consists of: 20-35 wt% of Cr, 8-15 wt% of Ni, 1.0-8.0 wt% of Mn, less than 0.2 wt% of C, less than 2.0 wt% of Si, less than 5.0 wt% of impurities and the balance of Fe.
6. Parent-harmless abrasion-resistant structure according to claim 5, characterized in that said welded abrasion-resistant stud (3) consists of: cr 6-35 wt%, Ni less than 5.0 wt%, Mn 1.0-8.0 wt%, C1.5-5.5 wt%, Si less than 2.0 wt%, impurity less than 15.0 wt%, and Fe for the rest.
7. A matrix-harmless abrasion-resistant structure as claimed in claim 1, wherein said matrix (1) is a body of revolution, a flat plate or other irregularly shaped member.
8. A method of making a matrix-friendly abrasion resistant structure as claimed in any one of claims 1 to 7, comprising the steps of:
(1) uniformly overlaying a transition layer (2) on the surface of the matrix (1);
(2) forming a round hole (2-1) on the transition layer (2) in the step (1);
(3) and (3) surfacing and welding the wear-resistant stud (3) in the round hole (2-1) in the step (2) to complete the process.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114669361A (en) * | 2022-03-31 | 2022-06-28 | 武汉华材表面科技有限公司 | Bimetal wear-resistant roller sleeve with ultrahigh embedded stud surface density and manufacturing method thereof |
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| CN108246412A (en) * | 2018-03-07 | 2018-07-06 | 渠县金城合金铸业有限公司 | A kind of Abrasion-resistant tooth roller shell of roll crusher |
| CN110252463A (en) * | 2019-06-24 | 2019-09-20 | 郑州机械研究所有限公司 | A kind of abrasion-proof structure and preparation method thereof being easily repaired |
| CN212493220U (en) * | 2020-04-23 | 2021-02-09 | 浙江申轮水泥机械制造有限公司 | Rotating shaft hammer disc of crusher |
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| CN114669361A (en) * | 2022-03-31 | 2022-06-28 | 武汉华材表面科技有限公司 | Bimetal wear-resistant roller sleeve with ultrahigh embedded stud surface density and manufacturing method thereof |
| CN114669361B (en) * | 2022-03-31 | 2023-09-26 | 武汉华材表面科技有限公司 | Bimetal wear-resistant roller sleeve with ultrahigh imbedding post nail surface density and manufacturing method thereof |
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