High-chromium steel ball with wear-resistant structure on surface

Abstract

The utility model discloses a high chromium steel ball with wear -resisting structure on surface relates to high chromium steel ball relevant field, in order to solve the problem of the burr under polishing of the high chromium steel ball in prior art, the burr is easy to rub with the steel ball continuously, and the wear of steel ball is increased. A plurality of indicating ring convex parts are arranged equidistantly from front to back outside the surface high hardness layer, the outer surface of the indicating ring convex part is arc-shaped, and the arc shape of the outer surface of the plurality of indicating ring convex parts shares the same center with the surface high hardness layer. A ring-shaped groove is formed between the adjacent two indicating ring convex parts on the outer surface of the surface high hardness layer.

Description

Technical Field

[0001] This utility model relates to the field of high-chromium steel balls, specifically a high-chromium steel ball with a wear-resistant surface structure. Background Technology

[0002] High-chromium steel balls are widely used wear-resistant materials in the industrial field, playing a crucial role, especially in large-scale crushing and grinding equipment in industries such as mining, power, building materials, and metallurgy. Their core function is to efficiently crush and grind materials under high-speed rotation or impact conditions through their high hardness and wear resistance, thereby ensuring the continuity and economy of the production process.

[0003] The wear resistance of high-chromium steel balls depends not only on the chemical composition and heat treatment process of the material itself, but also on its surface structure design. For example, the Chinese authorized patent with publication number CN221605309U (A high-chromium ball with high wear resistance and high strength) includes a wear-resistant sleeve, an adhesive layer, a high-chromium ball body, and a counterweight core. The adhesive layer is located on the inner side of the wear-resistant sleeve, and the high-chromium ball body is located on the inner side of the adhesive layer. This ultra-high chromium ball, characterized by its high wear resistance and high strength, features an outer frame with one front end aligned with the upper plate and the other with the lower plate, secured by positioning screws. This integrates the outer frame with the high-chromium ball body into a single unit. The reinforcing grooves on the outer side of the outer frame enhance its wear resistance, thereby improving the overall wear resistance of the ultra-high chromium ball. This allows the ultra-high chromium ball to be used in high-intensity mill production. Furthermore, when the reinforcing grooves on the outer side of the outer frame wear severely, the two outer frames can be separated and replaced with new ones, then reassembled onto the outer side of the high-chromium ball body to maintain the high wear resistance of the ultra-high chromium ball.

[0004] Although the aforementioned existing technology has the function of having a wear-resistant surface structure, the burrs produced during the polishing of high-chromium steel balls are small in weight and do not fall off easily. They tend to adhere to the surface of the high-chromium steel balls and continue to rub against the steel balls as the polishing work continues, increasing the wear of the steel balls. Utility Model Content

[0005] The purpose of this invention is to provide a high-chromium steel ball with a wear-resistant surface structure to solve the problem mentioned in the background art that when high-chromium steel balls are polished, the burrs from the polishing process easily rub against the steel ball, increasing the wear of the steel ball.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-chromium steel ball with a wear-resistant surface structure, comprising a high-hardness surface layer, wherein a plurality of indicator annular protrusions are equidistantly arranged from front to back on the outer side of the high-hardness surface layer, the outer surface of the indicator annular protrusions is arc-shaped, and the arc shape of the outer surface of the plurality of indicator annular protrusions is concentric with the high-hardness surface layer; an annular groove is formed on the outer surface of the high-hardness surface layer between two adjacent indicator annular protrusions.

[0007] Preferably, the edge of the outer surface of the indicator annular protrusion is set as a rounded corner, and the indicator annular protrusion is connected to the groove by an arc-shaped part.

[0008] Preferably, the inner surface of the high-hardness layer forms a first inner bonding protrusion and a first inner bonding groove. The first inner bonding protrusion and the first inner bonding groove form multiple sets of first bonding paths and are arranged in a circular array. The first inner bonding protrusion and the first inner bonding groove are alternately arranged on each set of first bonding paths.

[0009] Preferably, a transition layer is provided inside the high surface hardness layer, and the high surface hardness layer is fixed to the outside of the transition layer by laser cladding technology. A core toughness layer is provided inside the transition layer, and the transition layer is fixed to the outside of the core toughness layer by laser cladding technology.

[0010] Preferably, the outer surface of the transition layer is provided with a second inner bonding protrusion and a second inner bonding groove, the second inner bonding protrusion and the second inner bonding groove being respectively matched with the first inner bonding groove and the first inner bonding protrusion.

[0011] Preferably, the inner surface of the transition layer forms a third inner bonding protrusion and a third inner bonding groove. The third inner bonding protrusion and the third inner bonding groove form multiple sets of second bonding paths and are arranged in a circular array. The third inner bonding protrusion and the third inner bonding groove are alternately arranged on each set of second bonding paths, and the second bonding paths are perpendicular to the first bonding paths.

[0012] Preferably, the outer surface of the core toughness layer is provided with a fourth inner bonding protrusion and a fourth inner bonding groove, and the fourth inner bonding protrusion and the fourth inner bonding groove are respectively matched with the third inner bonding groove and the third inner bonding protrusion.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) In this utility model, the setting of the high-hardness surface layer and the special design of the indicator ring protrusion and groove effectively avoid the continuous friction between the burrs under grinding and the high-chromium steel ball, greatly reducing the wear of the high-chromium steel ball and significantly extending its service life. Moreover, the drag-reducing design of the groove greatly reduces the resistance when the high-chromium steel ball is rotated and thrown up, making it easier to be thrown up, reducing the time spent in the lower end of the ball mill, improving grinding efficiency, and enabling the ball mill to achieve the ideal grinding effect in a shorter time, thereby improving production efficiency.

[0015] (2) In this utility model, as the high-chromium steel ball is used continuously during grinding, the distance between the indicator ring protrusion and the groove will decrease. This change provides the operator with an intuitive wear indication, making it convenient to understand the wear of the high-chromium steel ball in a timely manner and to determine whether it can continue to be used normally. This avoids the situation where the grinding quality is affected by excessive wear of the high-chromium steel ball, and improves the stability and reliability of production.

[0016] (3) In this utility model, the surface high-hardness layer, transition layer, and core toughness layer perform different functions. The outer layer enhances wear resistance, while the low-alloy core ensures toughness, achieving a gradient transition in hardness. Simultaneously, the bonding force between the layers is greatly enhanced through the special design of internal protrusions and grooves, as well as the fixing effect of laser cladding technology. When the high-chromium steel ball is subjected to external force, the layers can work together to resist deformation and damage, improving the overall structural stability and impact resistance of the high-chromium steel ball. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a high-chromium steel ball with a wear-resistant surface according to the present invention;

[0018] Figure 2 This is a front view of a high-chromium steel ball with a wear-resistant surface structure according to the present invention;

[0019] Figure 3 This is a cross-sectional view of the high-hardness layer on the surface of a high-chromium steel ball with a wear-resistant structure according to this utility model.

[0020] Figure 4 This is a cross-sectional view of the transition layer of a high-chromium steel ball with a wear-resistant structure on its surface, according to the present invention.

[0021] Figure 5 This is a back view after the transition layer of a high-chromium steel ball with a wear-resistant surface structure of this utility model has been cut open.

[0022] Figure 6 This is a cross-sectional view of the core toughness layer of a high-chromium steel ball with a wear-resistant structure on its surface, according to the present invention.

[0023] In the figure: 1. High-hardness surface layer; 2. Indicator ring protrusion; 3. Groove; 4. Rounded corner; 5. Arc-shaped part; 6. First inner bonding protrusion; 7. First inner bonding groove; 8. Transition layer; 9. Second inner bonding protrusion; 10. Second inner bonding groove; 11. Third inner bonding protrusion; 12. Third inner bonding groove; 13. Core toughness layer; 14. Fourth inner bonding protrusion; 15. Fourth inner bonding groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Please see Figures 1-6 One embodiment provided by this utility model:

[0026] (1) Related structures of surface high hardness layer 1

[0027] Multiple annular protrusions 2 are equidistantly arranged from front to back on the outer surface of the high-hardness surface layer 1. The outer surface of each annular protrusion 2 is arc-shaped, and the arc of the outer surface of each annular protrusion 2 is concentric with the high-hardness surface layer 1. Annular grooves 3 are formed on the outer surface of the high-hardness surface layer 1 between adjacent annular protrusions 2. The edges of the outer surface of each annular protrusion 2 are rounded 4, and the connection between the annular protrusion 2 and the groove 3 is achieved through an arc-shaped portion 5.

[0028] During operation, when the high-chromium steel ball is located inside the ball mill to assist in grinding other workpieces, the annular protrusion 2 and the high-hardness surface layer 1 work together to grind the workpiece. The burrs removed during grinding fall down along the groove 3, effectively preventing continuous friction between the burrs and the high-chromium steel ball. Simultaneously, the special design of the groove 3 reduces drag; when the high-chromium steel ball is thrown up by rotation, the resistance is significantly reduced, making it easier to throw up and reducing its time inside the lower part of the ball mill. This further improves grinding efficiency, allowing the ball mill to achieve the desired grinding effect in a shorter time.

[0029] As the high-chromium steel ball is used continuously during grinding, the distance between the indicator ring protrusion 2 and the groove 3 will decrease. This change serves as a direct indicator, allowing operators to understand the wear condition of the high-chromium steel ball in a timely manner.

[0030] A first inner bonding protrusion 6 and a first inner bonding groove 7 are formed on the inner surface of the high-hardness layer 1. The first inner bonding protrusion 6 and the first inner bonding groove 7 form multiple sets of first bonding paths and are arranged in a circular array. The first inner bonding protrusion 6 and the first inner bonding groove 7 are alternately arranged on each set of first bonding paths.

[0031] (2) Transition layer 8 related structures

[0032] A transition layer 8 is provided inside the high-hardness surface layer 1, and the high-hardness surface layer 1 is fixed to the outside of the transition layer 8 by laser cladding technology.

[0033] The outer surface of the transition layer 8 is provided with a second inner bonding protrusion 9 and a second inner bonding groove 10, which are respectively matched with the first inner bonding groove 7 and the first inner bonding protrusion 6. This structural design makes the bond between the high-hardness surface layer 1 and the transition layer 8 tighter. When the high-chromium steel ball is subjected to external force, it effectively transfers stress and prevents peeling between the high-hardness surface layer 1 and the transition layer 8, greatly improving the structural strength and reliability of the high-chromium steel ball, enabling it to operate stably for a long time in harsh working environments.

[0034] The inner surface of the transition layer 8 forms a third inner bonding protrusion 11 and a third inner bonding groove 12. The third inner bonding protrusion 11 and the third inner bonding groove 12 form multiple sets of second bonding paths and are arranged in a circular array. The third inner bonding protrusion 11 and the third inner bonding groove 12 are alternately arranged on each set of second bonding paths. The second bonding path is perpendicular to the first bonding path.

[0035] (3) Core toughness layer 13 related structures

[0036] A core toughness layer 13 is disposed inside the transition layer 8, and the transition layer 8 is fixed to the outside of the core toughness layer 13 by laser cladding technology. The transition layer 8 plays a role in buffering and transitioning, effectively alleviating the stress concentration problem caused by the performance difference between the core toughness layer 13 and the surface high hardness layer 1.

[0037] The outer surface of the core toughness layer 13 is provided with a fourth inner bonding protrusion 14 and a fourth inner bonding groove 15, which are respectively matched with the third inner bonding groove 12 and the third inner bonding protrusion 11. As the core part of the high-chromium steel ball, the core toughness layer 13 has the toughness to ensure that the high-chromium steel ball is not prone to breakage when subjected to large impact forces. The matching arrangement of the fourth inner bonding protrusion 14 and the fourth inner bonding groove 15 with the third inner bonding groove 12 and the third inner bonding protrusion 11 further enhances the bonding force between the core toughness layer 13 and the transition layer 8. This allows the core toughness layer 13 to work better with the transition layer 8 when the high-chromium steel ball is subjected to external forces, jointly bearing and dispersing stress, improving the fatigue resistance and reliability of the high-chromium steel ball, and ensuring that it can maintain stable performance during long-term use.

[0038] In the manufacturing process, a core toughening layer 13 is first manufactured using a low Cr / Mo content. This core toughening layer 13 is a low-alloy component. The preliminary shape of the fourth inner bonding protrusion 14 is then established using laser cladding technology, followed by polishing to form a precise fourth inner bonding protrusion 14. This method of establishing the preliminary shape before polishing ensures the dimensional accuracy and surface quality of the fourth inner bonding protrusion 14, laying the foundation for a tight bond between subsequent layers. Next, the fourth inner bonding groove 15 is created using femtosecond laser processing or roll forming technology.

[0039] Subsequently, the Cr / Mo content was adjusted to increase its concentration, and a transition layer 8 was formed by laser cladding to encapsulate the core tough layer 13. The transition layer 8 serves as a buffer and transition layer, alleviating stress concentration issues caused by performance differences between the core tough layer 13 and the surface high-hardness layer 1. During the formation of the transition layer 8, a third internal bonding protrusion 11 and a third internal bonding groove 12 are formed internally. Following the same processing procedure, a second internal bonding protrusion 9 and a second internal bonding groove 10 are formed on the outer surface of the transition layer 8. This method of layer-by-layer processing to form internal bonding protrusions and grooves enhances the bonding force between the layers.

[0040] The Cr / Mo content was further increased by adjusting it, and a high-hardness surface layer 1 was formed on the outside of the transition layer 8 using laser cladding technology. The high-hardness surface layer 1 improves the surface wear resistance of the high-chromium steel ball. During the formation of the high-hardness surface layer 1, a first inner bonding protrusion 6 and a first inner bonding groove 7 were formed internally.

[0041] The initial shape of the indicator ring protrusion 2 is set by laser cladding technology, and then polished to form the indicator ring protrusion 2. The groove 3 is opened by femtosecond laser processing or roll forming technology. The inside of the groove 3 is made into an arc-shaped part 5 by polishing, and the edge of the indicator ring protrusion 2 is polished to form a rounded corner part 4.

[0042] The specific material ratios of the core toughness layer 13, the transition layer 8, and the surface high hardness layer 1 are not specifically limited, nor are they limited to the material content adjustments mentioned above. The main focus is on controlling the wear resistance and toughness of the three materials to ensure that the toughness is weakened from the inside out and the wear resistance is enhanced from the inside out.

[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-chromium steel ball with a wear-resistant surface structure, comprising a high-hardness surface layer (1), characterized in that: The high-hardness surface layer (1) has multiple indicator ring protrusions (2) evenly spaced from front to back. The outer surface of the indicator ring protrusions (2) is arc-shaped, and the arc shape of the outer surface of the multiple indicator ring protrusions (2) is concentric with the high-hardness surface layer (1). The outer surface of the high-hardness surface layer (1) has an annular groove (3) between two adjacent indicator ring protrusions (2).

2. A high-chromium steel ball with a wear-resistant surface structure according to claim 1, characterized in that: The edge of the outer surface of the indicator ring protrusion (2) is set as a rounded corner (4), and the connection between the indicator ring protrusion (2) and the groove (3) is connected by an arc-shaped part (5).

3. A high-chromium steel ball with a wear-resistant surface structure according to claim 1, characterized in that: The inner surface of the high-hardness layer (1) forms a first inner bonding protrusion (6) and a first inner bonding groove (7). The first inner bonding protrusion (6) and the first inner bonding groove (7) form multiple sets of first bonding paths and are arranged in a ring array. The first inner bonding protrusion (6) and the first inner bonding groove (7) are alternately arranged on each set of first bonding paths.

4. A high-chromium steel ball with a wear-resistant surface structure according to claim 3, characterized in that: The high surface hardness layer (1) has a transition layer (8) inside it. The high surface hardness layer (1) is fixed to the outside of the transition layer (8) by laser cladding technology. The transition layer (8) has a core toughness layer (13) inside it. The transition layer (8) is fixed to the outside of the core toughness layer (13) by laser cladding technology.

5. A high-chromium steel ball with a wear-resistant surface structure according to claim 4, characterized in that: The outer surface of the transition layer (8) is provided with a second inner bonding protrusion (9) and a second inner bonding groove (10), and the second inner bonding protrusion (9) and the second inner bonding groove (10) are respectively matched with the first inner bonding groove (7) and the first inner bonding protrusion (6).

6. A high-chromium steel ball with a wear-resistant surface structure according to claim 5, characterized in that: The inner surface of the transition layer (8) forms a third inner bonding protrusion (11) and a third inner bonding groove (12). The third inner bonding protrusion (11) and the third inner bonding groove (12) form multiple sets of second bonding paths and are arranged in a circular array. The third inner bonding protrusion (11) and the third inner bonding groove (12) are alternately arranged on each set of second bonding paths. The second bonding path is perpendicular to the first bonding path.

7. A high-chromium steel ball with a wear-resistant surface structure according to claim 6, characterized in that: The outer surface of the core toughness layer (13) is provided with a fourth inner bonding protrusion (14) and a fourth inner bonding groove (15), and the fourth inner bonding protrusion (14) and the fourth inner bonding groove (15) are respectively matched with the third inner bonding groove (12) and the third inner bonding protrusion (11).

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