Surface strengthened high chromium ball

Abstract

The utility model discloses a kind of surface strengthening high-chrome balls, it is related to high-chrome ball technical field, including sphere, the sphere surface is provided with each other crossing vertical first reinforcing bar and second reinforcing bar, the cross section of first reinforcing bar and second reinforcing bar is semicircular;The surface strengthening high-chrome ball;By setting cross reinforcing bar, improve wear resistance and shear force, optimize polishing efficiency;Polishing surface and boss structure reduce speed, enhance collision rotation effect;Bump design promotes shear force, so that polishing is more fine;Reinforcing bar uses chromium carbide outer layer and nitriding inner layer, with high wear resistance and corrosion resistance;Boss's connecting layer and polishing layer structure improve impact resistance and fatigue resistance, prolong service life.

Description

Technical Field

[0001] This utility model relates to the field of high-chromium ball technology, specifically to a surface-strengthened high-chromium ball. Background Technology

[0002] High-chromium balls, as a wear-resistant grinding media, are widely used in industries such as mining, cement, power, and chemicals. They are mainly used in ball mills for crushing and grinding materials.

[0003] Traditional high-chromium balls are prone to reduced service life due to impact wear during long-term use, and their grinding efficiency is limited. In existing technologies, some high-chromium balls improve wear resistance through surface strengthening, but they still have problems such as insufficient impact resistance and insufficient grinding precision.

[0004] Therefore, a new type of surface-strengthened high-chromium ball is needed to improve wear resistance, impact resistance and grinding efficiency. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a surface-strengthened high-chromium ball, which solves the problem of surface strengthening of high-chromium balls. Through the cross-cooperation of the first and second reinforcing strips, an impact-strengthening mesh structure is formed, improving the surface impact resistance and wear resistance of the high-chromium ball.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a surface-strengthened high-chromium ball, comprising a ball, characterized in that: a plurality of first reinforcing strips are provided on the surface of the ball, and a plurality of second reinforcing strips are provided on the surface of the ball, the first reinforcing strips and the second reinforcing strips are arranged perpendicularly to each other, and the cross-sections of the first reinforcing strips and the second reinforcing strips are both semi-circular.

[0007] Furthermore: the surface of the sphere is provided with multiple polishing surfaces, and a boss is fixed on the polishing surface, the outer surface of the boss being rounded.

[0008] Furthermore, a plurality of equally spaced protrusions are fixed on the end faces of a pair of corresponding grinding surfaces, the protrusions being located on the outer side of the boss.

[0009] Furthermore: the first reinforcing strip and the second reinforcing strip are integrally formed, including an inner layer and an outer layer, wherein the inner layer and the outer layer are of equal thickness.

[0010] Furthermore: the boss is composed of a connecting layer and a polishing layer, the connecting layer is integrally formed with the sphere, and the polishing layer is wrapped around the outside of the connecting layer.

[0011] Furthermore, the surface of the polishing layer is frosted, and the edges of the polished surface are rounded.

[0012] This invention provides a surface-strengthened high-chromium sphere. Compared with the prior art, it has the following advantages:

[0013] This surface-strengthened high-chromium ball features cross-reinforcing strips to improve wear resistance and shear force, optimizing grinding efficiency. The grinding surface and boss structure reduce rotation speed and enhance the impact rotation effect. The boss design increases shear force, making grinding more precise. The reinforcing strips use a chromium carbide outer layer and a nitrided inner layer, combining high wear resistance and corrosion resistance. The boss's connecting layer and grinding layer structure improve impact resistance and fatigue resistance, extending service life. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the boss and the polished surface of this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the boss and protrusion of this utility model;

[0017] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle.

[0018] In the diagram: 1. Sphere; 2. Polished surface; 3. Boss; 4. Protrusion; 5. First reinforcing strip; 6. Second reinforcing strip; 7. Inner layer; 8. Outer layer; 31. Connecting layer; 32. Polished layer. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4This utility model provides a technical solution: a surface-strengthened high-chromium ball; specifically, it consists of a ball 1. The high-chromium ball is a wear-resistant grinding medium widely used in industries such as mining, cement, power, and chemicals. It is mainly used in ball mills for crushing and grinding materials. This is existing technology and will not be described in detail here. A first reinforcing strip 5 and a second reinforcing strip 6 are provided on the surface of the ball 1. The number of first reinforcing strips 5 and second reinforcing strips 6 is multiple, and the first reinforcing strips 5 and second reinforcing strips 6 are arranged perpendicularly to each other on the surface of the ball 1. The cross-section of the first reinforcing strips 5 and second reinforcing strips 6 is semi-circular. The first reinforcing strips 5 and second reinforcing strips 6 can increase the wear resistance of the surface of the ball 1, and the arc-shaped surfaces of the first reinforcing strips 5 and second reinforcing strips 6 can increase the shear force when the balls 1 collide with each other, so that the material can be ground more finely and the grinding efficiency can be improved.

[0021] A polishing surface 2 is provided on the surface of the ball 1. The polishing surface 2 is located on all six sides of the ball 1. A boss 3 is fixed on the polishing surface 2. The outer surface of the boss 3 is rounded. The boss 3 and the polishing surface 2 can reduce the rotation speed of the ball 1 when it rolls and impacts, so that the balls 1 can collide and rotate with each other from side to side, thereby further improving the efficiency of rotational polishing.

[0022] Two corresponding grinding surfaces 2 have protrusions 4 fixed on their end faces. There are multiple protrusions 4 with equal spacing. The protrusions 4 are located on the outside of the boss 3. The protrusions 4 can match a finer shearing force when impacted, which can perform finer grinding on the grinding body and improve the grinding effect.

[0023] The first reinforcing strip 5 and the second reinforcing strip 6 are integrally formed, and both the first reinforcing strip 5 and the second reinforcing strip 6 are connected by an inner layer 7 and an outer layer 8. The outer layer 8 is formed by infiltrating carbon / chromium elements into the surface layer at high temperature (900-1000℃) to further form a high-hardness chromium carbide (Cr7C3) layer, which significantly improves wear resistance. The inner layer 7 is subjected to gas or ion nitriding at 500-570℃ to form an ε-Fe2-3N or γ'-Fe4N compound layer + diffusion layer, which improves corrosion resistance and is suitable for wet grinding environments.

[0024] The boss 3 is composed of a connecting layer 31 and a polishing layer 32. The connecting layer 31 and the ball 1 are integrally formed. The connection layer 31 and the ball 1 can improve impact stability and reduce damage. The polishing layer 32 is wrapped on the outside of the connecting layer 31. The polishing layer 32 improves the overall polishing efficiency. It mainly uses high-speed steel shot or ceramic shot to bombard the surface of the boss 3, introduce residual compressive stress, and improve fatigue resistance and impact resistance.

Claims

1. A surface-strengthened high-chromium sphere, comprising a sphere (1), characterized in that: The surface of the sphere (1) is provided with a plurality of first reinforcing strips (5) and a plurality of second reinforcing strips (6). The first reinforcing strips (5) and the second reinforcing strips (6) are arranged perpendicularly to each other, and the cross-sections of the first reinforcing strips (5) and the second reinforcing strips (6) are both semi-circular.

2. The surface-strengthened high-chromium ball according to claim 1, characterized in that: The surface of the sphere (1) has multiple polishing surfaces (2), and a boss (3) is fixed on the polishing surface (2). The outer surface of the boss (3) is rounded.

3. The surface-strengthened high-chromium ball according to claim 2, characterized in that: One of the two corresponding grinding surfaces (2) has a plurality of equally spaced protrusions (4) fixed on its end face, and the protrusions (4) are located on the outside of the boss (3).

4. The surface-strengthened high-chromium ball according to claim 2, characterized in that: The first reinforcing strip (5) and the second reinforcing strip (6) are integrally formed, including an inner layer (7) and an outer layer (8), wherein the inner layer (7) and the outer layer (8) are of equal thickness.

5. A surface-strengthened high-chromium ball according to claim 2, characterized in that: The boss (3) is composed of a connecting layer (31) and a polishing layer (32). The connecting layer (31) is integrally formed with the sphere (1), and the polishing layer (32) is wrapped around the outside of the connecting layer (31).

6. The surface-strengthened high-chromium ball according to claim 5, characterized in that: The surface of the polishing layer (32) is frosted, and the edges of the polishing surface (2) are rounded.

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