High strength, wear resistant bearing cage

Abstract

The application discloses a high-strength and wear-resistant bearing retainer and belongs to the technical field of bearing retainers. The bearing retainer comprises a retainer body, a plurality of cross beams are arranged in the retainer body, pockets are formed between every two adjacent cross beams, a cross beam side wall is arranged on one side of the cross beam relative to the pocket, and the cross beam side wall is sequentially provided with a circular arc transition surface, a pressure slope contact surface, a first inclined surface and a first circular arc surface from an outer diameter to an inner diameter. The material of the high-strength and wear-resistant bearing retainer is composed of the following alloy elements according to weight: Si: 0.7% to 1.3%, Cu: 0.3% to 0.5%, Mn: 0.6% to 1.0%, Mg: 0.8% to 1.2%, Cr: 0.15% to 0.2%, Fe: less than or equal to 0.15%, Zn: less than or equal to 0.1%, unavoidable impurity element content: less than or equal to 0.15%, and the rest is Al. The application specifically limits the structure of the retainer and the element composition of the material, so that the aluminum alloy material has high strength, excellent wear resistance, good ductility, can buffer impact load, is suitable for machining process and can guarantee forming quality.

Description

Technical Field

[0001] This application relates to a high-strength, wear-resistant bearing cage, belonging to the technical field of bearing cages. Background Technology

[0002] As a core component of mechanical transmission systems, bearings directly determine the operating accuracy, reliability, and service life of the entire machine. Bearing cages, as a key component of bearings, mainly serve to separate rolling elements, guide the smooth movement of rolling elements, maintain the uniform distribution of rolling elements, transmit loads, and assist in heat dissipation.

[0003] The pocket structure of existing traditional cylindrical roller bearings is mostly a full-circular pocket with an added clearance. Under high-speed operation, this type of pocket is not conducive to the flow of lubricating oil. The lubricating oil trapped in the pocket cannot flow and does not play a good role in heat dissipation, resulting in increased bearing temperature, decreased precision, and stress concentration, causing abnormal wear. In addition, as modern industry develops towards high speed, heavy load, high precision, and long service life, the operating conditions of bearings are becoming increasingly harsh, which also places higher demands on the cage material. On the one hand, it needs to have sufficient strength and hardness to withstand the impact and extrusion loads of the rolling elements. On the other hand, it also needs to have excellent wear resistance to reduce frictional losses between the rolling elements and the inner and outer rings.

[0004] Currently, the main cage materials commonly used in the industrial field include steel, copper alloys, and aluminum alloys. Steel and copper alloys have relatively high densities, making it difficult to meet lightweight requirements. In contrast, aluminum alloys, due to their low density (approximately 2.7 g / cm³), excellent thermal conductivity, good corrosion resistance, and controllable cost, have become the preferred material for lightweight cages. However, aluminum alloys have significant shortcomings in mechanical properties, making it difficult to meet the load-bearing requirements under high-speed, heavy-load conditions. Existing technologies typically introduce strengthening elements, such as rare earth elements, into aluminum alloys to improve their mechanical properties. However, this increases costs. Furthermore, materials used for bearing cages, in addition to requiring high mechanical properties, also have high requirements for ductility to buffer impact loads, adapt to processing techniques, and ensure the forming quality of the bearing cage.

[0005] Therefore, there is a need to provide a bearing cage that achieves high strength and excellent wear resistance while having good elongation to adapt to processing technology and buffer impact loads. Summary of the Invention

[0006] To address the aforementioned issues, a high-strength, wear-resistant bearing cage is provided. This application specifies the cage structure, elemental composition, element content, and material preparation method. By introducing Mn and Cr, which work together with Cu, the high strength and wear resistance are ensured while effectively mitigating the intergranular corrosion sensitivity and reduced ductility caused by Cu. This allows the aluminum alloy material to achieve high strength and excellent wear resistance while possessing good ductility, enabling it to buffer impact loads, adapt to processing techniques, and guarantee formation quality.

[0007] According to one aspect of this application, a high-strength, wear-resistant bearing cage is provided, including a cage body, a plurality of crossbeams are provided in the cage body, the crossbeams are evenly distributed along the circumference of the cage body, pockets are formed between pairs of adjacent crossbeams, the side of the crossbeam opposite the pocket is a crossbeam sidewall, the crossbeam sidewall is provided with an arc transition surface, a slope contact surface, a first inclined surface and a first arc surface in sequence from the outer radial direction to the inner diameter; stress relief notches are provided at the four corners of the pocket, the stress relief notches are provided with a first arc segment, a straight surface segment and a second arc segment in sequence; a protrusion is also provided on the inner diameter side of the crossbeam, the two ends of the protrusion are transitioned by a second inclined surface, the middle of the protrusion is provided with a recess, the two ends of the recess are transitioned by a second arc surface; The material of the high-strength, wear-resistant bearing cage, by weight, consists of the following alloying elements: Si: 0.7%–1.3%, Cu: 0.3%–0.5%, Mn: 0.6%–1.0%, Mg: 0.8%–1.2%, Cr: 0.15%–0.2%, Fe: ≤0.15%, Zn: ≤0.1%, other unavoidable impurity elements ≤0.15%, and the remainder is Al.

[0008] Specifically, this application uses Al as the main element to achieve material lightweighting, and further limits the composition and proportion of the other elements by introducing Cu, Mn and Cr, which work together to achieve a balance between material strength and ductility, so as to meet the requirements of bearing cage strength and wear resistance, and also have strong machinability.

[0009] Optionally, the material of the high-strength, wear-resistant bearing cage, by weight, consists of the following alloying elements: Si: 0.8%–1.0%, Cu: 0.4%–0.5%, Mn: 0.6%–0.8%, Mg: 0.9%–1.1%, Cr: 0.15%–0.2%, Fe: ≤0.15%, Zn: ≤0.1%, other unavoidable impurity elements ≤0.15%, and the remainder being Al.

[0010] Optionally, the mass ratio of Mg to Si is 1.0 to 1.2.

[0011] Specifically, in this application, Si is used as a basic strengthening element to form the Mg2Si main strengthening phase with Mg, which can effectively hinder dislocation movement and thus significantly improve the strength and hardness of the alloy. This application limits the mass ratio of Mg to Si to avoid Mg excess. On the one hand, it can ensure the basic strengthening of Mg2Si, and on the other hand, it can provide sufficient Si source for Mn-Cu synergy.

[0012] Optionally, the mass ratio of Cu to Mn is 0.4 to 0.7.

[0013] Specifically, a sufficient amount of Mn forms an Al(Mn,Cu)Si dispersed phase with Cu, which reduces intergranular corrosion caused by Cu at grain boundaries. However, too much Mn can easily form a coarse Al(Mn,Fe)Si phase, which adversely affects the elongation. Therefore, this application limits the mass ratio of Cu to Mn to enhance strength and reduce intergranular corrosion without affecting the elongation.

[0014] Optionally, the mass ratio of Cu to Cr is 1.5 to 2.5.

[0015] Specifically, Cr can refine grains, but too much Cr can easily form a brittle Al7Cr phase, reducing ductility. Therefore, Cu and Cr in a specific ratio can achieve the best effect of refining grains and improving ductility.

[0016] Optionally, the method for preparing the high-strength, wear-resistant bearing cage material includes the following steps: (1) Raw material preparation: Prepare raw materials according to the specified proportions; (2) Alloy melting: Add aluminum to the crucible, heat to 720~740℃, and hold for 10~15 minutes after complete melting. Then add aluminum-silicon master alloy, aluminum-copper master alloy, aluminum-manganese master alloy, aluminum-magnesium master alloy, and aluminum-chromium master alloy in sequence, stir evenly, and obtain the melt. (3) Refining treatment: Nitrogen gas carrying hexachloroethane refining agent is introduced into the melt for refining treatment. After refining, the melt is kept at a constant temperature. The aluminum liquid is poured into the mold and the cooling rate is controlled at 10~15℃ / s to obtain aluminum alloy ingots. (4) Homogenization annealing: Heat the aluminum alloy ingot to 520~540℃, hold for 8~10h, and cool to room temperature with the furnace; (5) Extrusion molding: The homogenized and annealed ingot is hot-extruded on an extruder to obtain the profile; (6) Solution treatment: Heat the profile to 530~550℃, keep it at that temperature for 2~3 hours, and then quickly quench it in water at 60~80℃; (7) Aging treatment: Heat the quenched profile to 90~100℃ and hold for 2~4 hours, then continue heating to 120~130℃ and hold for 6~8 hours.

[0017] Specifically, this application uses hot extrusion to obtain profiles, and through solution treatment and graded aging treatment, Cu, Mg, Si and other atoms in the supersaturated solid solution are precipitated in an optimized manner to form a small-sized and uniformly distributed strengthening phase, thereby obtaining the best comprehensive mechanical properties.

[0018] Specifically, this application employs a graded aging treatment. The first stage of treatment promotes uniform nucleation of Cu atoms within the crystal, consumes most of the Cu, and prevents the formation of coarse, lamellar Al2CuMg phases, thereby ensuring good corrosion resistance and ductility.

[0019] Optionally, the hot extrusion temperature is 450~480℃, and the holding time is 2~4 hours.

[0020] Optionally, a cold rolling deformation step may be included before the aging treatment.

[0021] Specifically, this application also includes cold rolling deformation to introduce high-density dislocations as heterogeneous nucleation cores for precipitates, thereby obtaining finer, more dispersed, and more numerous reinforcing phases during subsequent aging processes, achieving a significant improvement in strength, hardness, and wear resistance while ensuring ductility.

[0022] Optionally, the deformation amount of the cold rolling deformation is 2% to 5%.

[0023] Optionally, the refining process involves a refining time of 15-20 minutes, a refining agent dosage of 0.3%-0.5% of the melt weight, and a standing heat preservation time of 20-30 minutes.

[0024] The beneficial effects of this application include, but are not limited to: 1. The high-strength, wear-resistant bearing cage according to this application has Al as the main material element, which realizes material lightweighting, and further limits the composition and proportion of the other elements, introducing Cu, Mn and Cr, which work together to achieve a balance between material strength and ductility, which can not only meet the requirements of bearing cage strength and wear resistance, but also have strong machinability.

[0025] 2. According to the high-strength, wear-resistant bearing cage of this application, the mass ratio of Mg to Si, the mass ratio of Cu to Mn, and the mass ratio of Cu to Cr in its material composition are specifically limited, so that the bearing cage material can achieve a balance between high strength, wear resistance and ductility.

[0026] 3. According to the high-strength, wear-resistant bearing cage of this application, the material preparation method adopts hot extrusion to obtain profiles, and through solution treatment and graded aging treatment, Cu, Mg, Si and other atoms in the supersaturated solid solution are precipitated in an optimized manner to form a small-sized and uniformly distributed strengthening phase, thereby obtaining the best comprehensive mechanical properties. Through cold rolling deformation treatment, the strength, hardness and wear resistance are significantly improved while ensuring ductility.

[0027] 4. The high-strength, wear-resistant bearing cage of this application further defines the structure of the pocket, which can reduce friction and collision between balls and between rolling elements and the cage, reduce equipment vibration and noise, reduce stress concentration, reduce abnormal wear, extend service life, and also facilitate lubrication, ensuring the stable operation of high-speed precision equipment. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a front view of a high-strength, wear-resistant bearing cage according to an embodiment of this application; Figure 2 This is a perspective view of a high-strength, wear-resistant bearing cage according to an embodiment of this application; Figure 3 This is a partial enlarged view of part A of a high-strength, wear-resistant bearing cage according to an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures: 1. Cage body; 2. Crossbeam; 3. Pocket; 4. Stress relief notch; 5. First arc segment; 6. Straight surface segment; 7. Second arc segment; 8. Arc transition surface; 9. Sloping contact surface; 10. First inclined surface; 11. First arc surface; 12. Protrusion; 13. Second inclined surface; 14. Recess; 15. Second arc surface. Detailed Implementation

[0030] The present application is described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of skill in the art. The reagents and raw materials used in this invention are readily available through conventional means, and unless otherwise specified, they shall be used in accordance with conventional methods in the art or as per the product instructions. Furthermore, any methods and materials similar to or equivalent to those described herein may be applied to the methods of this invention. The preferred embodiments and materials described in this patent are for illustrative purposes only.

[0032] Example 1 A method for preparing a high-strength, wear-resistant bearing cage material includes the following steps: (1) Raw material preparation: The raw materials are prepared according to the following proportions: Si: 0.7%, Cu: 0.3%, Mn: 0.6%, Mg: 0.8%, Cr: 0.15%, Fe: 0.15%, Zn: 0.1%, other unavoidable impurity elements content 0.15%, and the remainder is Al; (2) Alloy melting: Add aluminum to the crucible, heat to 720℃, and hold for 10 minutes after complete melting. Then add aluminum-silicon master alloy, aluminum-copper master alloy, aluminum-manganese master alloy, aluminum-magnesium master alloy, and aluminum-chromium master alloy in sequence, and stir evenly to obtain the melt. (3) Refining treatment: Nitrogen gas is introduced into the melt and hexachloroethane refining agent is carried out for refining treatment. The refining time is 15 min, the amount of refining agent is 0.3% of the melt weight, and the standing temperature holding time is 20 min. After refining, the melt is left to stand and hold. The aluminum liquid is poured into the mold and the cooling rate is controlled at 10℃ / s to obtain aluminum alloy ingots. (4) Homogenization annealing: Heat the aluminum alloy ingot to 520°C, hold for 8 hours, and then cool it to room temperature in the furnace; (5) Extrusion molding: The homogenized annealed ingot is hot extruded on an extruder to obtain the profile. The hot extrusion temperature is 450℃ and the holding time is 2 hours. (6) Solution treatment: Heat the profile to 530°C, keep it at that temperature for 2 hours, and then quickly quench it in water at 60°C. (7) Aging treatment: Heat the quenched profile to 90°C, hold for 2 hours, and continue heating to 120°C for 6 hours.

[0033] Example 2 A method for preparing a high-strength, wear-resistant bearing cage material includes the following steps: (1) Raw material preparation: The raw materials are prepared according to the following proportions: Si: 1.3%, Cu: 0.5%, Mn: 1.0%, Mg: 1.2%, Cr: 0.2%, Fe: 0.15%, Zn: 0.1%, other unavoidable impurity elements content 0.15%, and the remainder is Al; (2) Alloy melting: Add aluminum to the crucible, heat to 740℃, and hold for 15 minutes after complete melting. Then add aluminum-silicon master alloy, aluminum-copper master alloy, aluminum-manganese master alloy, aluminum-magnesium master alloy, and aluminum-chromium master alloy in sequence, and stir evenly to obtain the melt. (3) Refining treatment: Nitrogen gas is introduced into the melt and hexachloroethane refining agent is carried out for refining treatment. The refining time is 20 min, the amount of refining agent is 0.5% of the melt weight, and the standing temperature holding time is 30 min. After refining, the melt is left to stand and hold. The aluminum liquid is poured into the mold and the cooling rate is controlled at 15℃ / s to obtain aluminum alloy ingots. (4) Homogenization annealing: Heat the aluminum alloy ingot to 540°C, hold for 10 hours, and then cool it to room temperature in the furnace; (5) Extrusion molding: The homogenized annealed ingot is hot extruded on an extruder to obtain the profile. The hot extrusion temperature is 480℃ and the holding time is 4 hours. (6) Solution treatment: Heat the profile to 550°C, keep it at that temperature for 3 hours, and then quickly quench it in water at 80°C. (7) Aging treatment: Heat the quenched profile to 100°C and hold for 4 hours, then continue heating to 130°C and hold for 8 hours.

[0034] Example 3 A method for preparing a high-strength, wear-resistant bearing cage material includes the following steps: (1) Raw material preparation: The raw materials are prepared according to the following proportions: Si: 0.8%, Cu: 0.4%, Mn: 0.6%, Mg: 0.9%, Cr: 0.15%, Fe: 0.15%, Zn: 0.1%, other unavoidable impurity elements content 0.15%, and the remainder is Al; (2) Alloy melting: Add aluminum to the crucible, heat to 730℃, and hold for 12 minutes after complete melting. Then add aluminum-silicon master alloy, aluminum-copper master alloy, aluminum-manganese master alloy, aluminum-magnesium master alloy, and aluminum-chromium master alloy in sequence, and stir evenly to obtain the melt. (3) Refining treatment: Nitrogen gas is introduced into the melt and hexachloroethane refining agent is carried out for refining treatment. The refining time is 17 min, the amount of refining agent is 0.4% of the melt weight, and the standing temperature holding time is 25 min. After refining, the melt is left to stand and hold. The aluminum liquid is poured into the mold and the cooling rate is controlled at 12℃ / s to obtain aluminum alloy ingots. (4) Homogenization annealing: Heat the aluminum alloy ingot to 530°C, hold for 9 hours, and then cool to room temperature in the furnace; (5) Extrusion molding: The homogenized annealed ingot is hot extruded on an extruder to obtain the profile. The hot extrusion temperature is 460℃ and the holding time is 3 hours. (6) Solution treatment: Heat the profile to 540°C, hold for 3 hours, and then quickly quench it in water at 70°C; (7) Aging treatment: Heat the quenched profile to 95°C, hold for 3 hours, and continue heating to 125°C for 7 hours.

[0035] Example 4 A method for preparing a high-strength, wear-resistant bearing cage material includes the following steps: (1) Raw material preparation: Prepare the raw materials according to the following proportions: Si: 1.0%, Cu: 0.5%, Mn: 0.8%, Mg: 1.1%, Cr: 0.2%, Fe: 0.15%, Zn: 0.1%, other unavoidable impurity elements ≤0.15%, the remainder is Al; (2) Alloy melting: Add aluminum to the crucible, heat to 730℃, and hold for 12 minutes after complete melting. Then add aluminum-silicon master alloy, aluminum-copper master alloy, aluminum-manganese master alloy, aluminum-magnesium master alloy, and aluminum-chromium master alloy in sequence, and stir evenly to obtain the melt. (3) Refining treatment: Nitrogen gas is introduced into the melt and hexachloroethane refining agent is carried out for refining treatment. The refining time is 17 min, the amount of refining agent is 0.4% of the melt weight, and the standing temperature holding time is 25 min. After refining, the melt is left to stand and hold. The aluminum liquid is poured into the mold and the cooling rate is controlled at 12℃ / s to obtain aluminum alloy ingots. (4) Homogenization annealing: Heat the aluminum alloy ingot to 530°C, hold for 9 hours, and then cool to room temperature in the furnace; (5) Extrusion molding: The homogenized annealed ingot is hot extruded on an extruder to obtain the profile. The hot extrusion temperature is 460℃ and the holding time is 3 hours. (6) Solution treatment: Heat the profile to 540°C, hold for 3 hours, and then quickly quench it in water at 70°C; (7) Aging treatment: Heat the quenched profile to 95°C, hold for 3 hours, and continue heating to 125°C for 7 hours.

[0036] Example 5 The difference between Example 5 and Example 1 is that Si: 0.7%, Cu: 0.3%, Mn: 0.6%, Mg: 1.2%, Cr: 0.15%, Fe: 0.15%, Zn: 0.1%, other unavoidable impurity elements content is 0.15%, the rest is Al, and the rest are the same.

[0037] Example 6 The difference between Example 6 and Example 1 is that Si: 0.7%, Cu: 0.3%, Mn: 1.0%, Mg: 1.2%, Cr: 0.15%, Fe: 0.15%, Zn: 0.1%, other unavoidable impurity elements content is 0.15%, the rest is Al, and the rest are the same.

[0038] Example 7 The difference between Example 7 and Example 1 is that Example 7 includes a cold rolling deformation treatment before aging treatment, with a deformation amount of 4%.

[0039] Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that Cu is not included, but everything else is the same.

[0040] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that Cr is not included, but everything else is the same.

[0041] Experimental Example 1 The aluminum alloy materials prepared in Examples 1-7 and Comparative Examples 1-2, as well as aluminum alloy AA6082, were subjected to performance tests. Mechanical performance testing: conducted in accordance with GB / T228.1-2021. Wear resistance test: According to ASTM D5706 standard, samples with dimensions of 50mm (length) * 20mm (width) * 0.1-0.5mm (thickness) were used. A UMT2 friction and wear testing machine with linear reciprocating motion and spherical contact was employed. The mating parts were GCr15 steel balls, and the friction time was 20 minutes. Before the experiment, the samples were sanded to 3500# to ensure consistent surface roughness. The experimental loads were 10N, and the speed was 12mm / s. A BalanceXPR106DUHQ / AC electronic analytical balance was then used to measure the wear amount of the sample mass. The wear resistance of the material was determined based on the amount of wear; the greater the wear amount, the lower the wear resistance, and vice versa.

[0042] The test results are shown in Table 1.

[0043] Table 1 Performance Test Results

[0044] As can be seen from Table 1, Example 7 is the best example, which balances strength and elongation. Comparative Example 1 has no Cu and lacks the Al2CuMg reinforcing phase, so the strengthening effect depends only on Mg2Si, resulting in a significant decrease in strength and wear resistance. Comparative Example 2 has no Cr, resulting in insufficient grain refinement, increased Cu grain boundary segregation, increased grain boundary brittleness, and a simultaneous decrease in plasticity and corrosion resistance.

[0045] like Figures 1-3As shown, this application provides a high-strength, wear-resistant bearing cage, including a cage body 1. The cage body 1 has several crossbeams 2, which are evenly distributed along the circumference of the cage body 1. A pocket 3 is formed between each pair of adjacent crossbeams 2. The side of the crossbeam 2 opposite to the pocket 3 is the crossbeam sidewall. The crossbeam sidewall is provided with an arc transition surface 8, a pressure slope contact surface 9, an inclined surface 10, and an arc surface 11 in sequence from the outer radial direction to the inner diameter. Stress relief notches 4 are provided at the four corners of the pocket 3. The stress relief notches 4 include a first arc segment 5, a straight surface segment 6, and a second arc segment 7 in sequence. A protrusion 12 is also provided on the inner diameter side of the crossbeam 2. The two ends of the protrusion 12 are transitioned by a second inclined surface 13, and the middle of the protrusion 12 is provided with a recess 14. The two ends of the recess 14 are transitioned by a second arc surface 15.

[0046] Specifically, this application uses a circular arc transition surface 8, a sloped contact surface 9, an inclined surface 10, and a circular arc surface 11 sequentially arranged from the outer radial direction to the inner diameter of the crossbeam sidewall to effectively reduce contact stress, achieve stable guidance, and improve wear resistance. By setting a stress relief notch 4 composed of a first circular arc segment 5, a straight surface segment 6, and a second circular arc segment 7, stress concentration is eliminated, structural strength and fatigue resistance are improved, a high-strength cage is achieved, and ultimately high structural strength, low wear, and long service life are achieved. In this application, a recessed part is set in the middle of the protrusion block, which on the one hand effectively reduces the weight to achieve lightweighting, and on the other hand reduces the contact area with the roller, reduces friction, and achieves low wear.

[0047] Specifically, the axial dimension of the pocket 3 is 37.91±0.05, and the circumferential dimension is 35.55±0.1, which can ensure that the roller has a suitable clearance in the pocket 3, while being stably guided; the depth of the pocket 3 is 6.2 and 9.31, which matches the diameter of the roller to ensure that the roller is effectively constrained.

[0048] Specifically, R is provided on the side wall of the beam. Z The 25mm arc transition surface 8 smoothly connects the outer circle and the side wall of the crossbeam, reducing stress concentration; the side wall of the crossbeam is provided with a sloped contact surface 9 of R14±0.85, which is used to form a surface contact with the roller, reduce contact stress, and improve wear resistance; the inclined surface 10 has an inclination angle of 13.5° to prevent swaying and jamming.

[0049] The above description is merely an embodiment of this application, and the scope of protection of this application is not limited to these specific embodiments, but is determined by the claims of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the technical concept and principles of this application should be included within the scope of protection of this application.

Claims

1. A high-strength, wear-resistant bearing cage, characterized in that, The cage includes a cage body with several crossbeams evenly distributed along its circumference. Adjacent crossbeams form pockets. The side of each crossbeam opposite the pocket is a sidewall, which, from its outer radial direction to its inner diameter, is sequentially provided with an arc transition surface, a sloped contact surface, a first inclined surface, and a first arc surface. Stress relief notches are provided at the four corners of the pockets, each notch comprising a first arc segment, a straight surface segment, and a second arc segment. A protrusion is also provided on the inner diameter side of the crossbeam, with both ends of the protrusion transitioning to a second inclined surface and a recess in the middle, the recessed portion having both ends transitioning to a second arc surface. The material of the high-strength, wear-resistant bearing cage, by weight, consists of the following alloying elements: Si: 0.7%–1.3%, Cu: 0.3%–0.5%, Mn: 0.6%–1.0%, Mg: 0.8%–1.2%, Cr: 0.15%–0.2%, Fe: ≤0.15%, Zn: ≤0.1%, other unavoidable impurity elements ≤0.15%, and the remainder is Al.

2. The high-strength, wear-resistant bearing cage according to claim 1, characterized in that, The material of the high-strength, wear-resistant bearing cage, by weight, consists of the following alloying elements: Si: 0.8%–1.0%, Cu: 0.4%–0.5%, Mn: 0.6%–0.8%, Mg: 0.9%–1.1%, Cr: 0.15%–0.2%, Fe: ≤0.15%, Zn: ≤0.1%, other unavoidable impurity elements ≤0.15%, and the remainder is Al.

3. The high-strength, wear-resistant bearing cage according to claim 1, characterized in that, The mass ratio of Mg to Si is 1.0 to 1.

2.

4. The high-strength, wear-resistant bearing cage according to claim 1, characterized in that, The mass ratio of Cu to Mn is 0.4 to 0.

7.

5. The high-strength, wear-resistant bearing cage according to claim 1, characterized in that, The mass ratio of Cu to Cr is 1.5 to 2.

5.

6. The high-strength, wear-resistant bearing cage according to any one of claims 1 to 5, characterized in that, The method for preparing the material of the high-strength, wear-resistant bearing cage includes the following steps: (1) Raw material preparation: Prepare raw materials according to the specified proportions; (2) Alloy melting: Add aluminum to the crucible, heat to 720~740℃, and hold for 10~15 minutes after complete melting. Then add aluminum-silicon master alloy, aluminum-copper master alloy, aluminum-manganese master alloy, aluminum-magnesium master alloy, and aluminum-chromium master alloy in sequence, stir evenly, and obtain the melt. (3) Refining treatment: Nitrogen gas carrying hexachloroethane refining agent is introduced into the melt for refining treatment. After refining, the melt is kept at a constant temperature. The aluminum liquid is poured into the mold and the cooling rate is controlled at 10~15℃ / s to obtain aluminum alloy ingots. (4) Homogenization annealing: Heat the aluminum alloy ingot to 520~540℃, hold for 8~10h, and cool to room temperature with the furnace; (5) Extrusion molding: The homogenized and annealed ingot is hot-extruded on an extruder to obtain the profile; (6) Solution treatment: Heat the profile to 530~550℃, keep it at that temperature for 2~3 hours, and then quickly quench it in water at 60~80℃; (7) Aging treatment: Heat the quenched profile to 90~100℃ and hold for 2~4 hours, then continue heating to 120~130℃ and hold for 6~8 hours.

7. The high-strength, wear-resistant bearing cage according to claim 6, characterized in that, The hot extrusion temperature is 450~480℃, and the holding time is 2~4 hours.

8. The high-strength, wear-resistant bearing cage according to claim 6, characterized in that, The process includes a cold rolling deformation step before the aging treatment.

9. The high-strength, wear-resistant bearing cage according to claim 8, characterized in that, The deformation amount of the cold rolling deformation is 2% to 5%.

10. The high-strength, wear-resistant bearing cage according to claim 8, characterized in that, The refining process involves a refining time of 15–20 min, a refining agent dosage of 0.3%–0.5% of the melt weight, and a standing heat preservation time of 20–30 min.

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