A new type of rail grinding wheel based on rare earth materials and graphene

Abstract

The invention discloses a novel steel rail grinding abrasion wheel based on rare earth material and graphene. The novel steel rail grinding abrasion wheel based on the rare earth material and the graphene comprises an abrasion wheel matrix and a grinding material. The grinding material comprises an abrasive material, an accessory, a binding agent, a wear-proof additive, a filler and a reinforcingmaterial. The abrasive material is zirconium corundum with a weight ratio of 35% to 37%. The auxiliary material includes rare earth with a weight ratio of 5% to 10% and the graphene with a weight ratio of 3% to 5%. The binding agent is phenolic resin with a weight ratio of 10%-15%. The wear-proof additive is cryolite with a weight ratio of 10%-15%.The filler is pyrite with a weight ratio of 12%-20%. The reinforcing material is chopped carbon fiber with the weight ratio of 11%-12%. According to the novel steel rail grinding abrasion wheel based on the rare earth material and the graphene, thenovel accessory composed of the rare earth material zirconium oxide and graphene is added to the abrasion wheel, so that the wear resistance and hardness of the abrasion wheel are improved, the consumption of the abrasion wheel is lowered, the grinding speed and the smoothness of the grinded face are improved, the grinding temperature of the abrasion wheel is lowered, and a steel rail is prevented from blueing.

Description

Technical field [0001] The invention relates to the technical field of grinding wheels, in particular to a new type of rail grinding wheel based on rare earth materials and graphene. Background technique [0002] The grinding wheel used in the grinding locomotive, namely the rail grinding wheel, is the key tool in the rail grinding. At present, most of the rail grinding wheels used in domestic rail grinding operations are imported from the United States (HTT). In recent years, some domestic manufacturers have carried out development and production, but the grinding performance of the grinding wheel is not completely comparable to the imported grinding wheel. [0003] However, after investigation, the imported grinding wheel is not perfect. The imported grinding wheel currently in use also has the following problems: 1. The roughness of the rail surface is not good after grinding, and the rail surface wear marks are obvious, which will cause damage to the wheel hub tread; 2. It is...

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Problems solved by technology

In recent years, some domestic manufacturers have carried out development and production, but the grinding performance of the grinding wheel is still not completely comparable to that of imported grinding wheels.

[0003] However, after investigation, the imported grinding wheel is not perfect, and the imported grinding wheel currently in use also has the following problems: 1. The roughness of the rail surface after grinding is not good, and the wear marks on the rail surface are obvious, which will cause damage to the hub tread; 2. It is easy to break. The grinding wheel is under high power and high grinding pressure. The grinding stone is easy to crack, which has potential safety hazards. 3. The heat dissipation performance is not good. Martensitic structure is produced, which is a very brittle metallographic structure. High-magnification microscopy can find that the metal particles have no relationship with each other and cannot form a fibrous structure, which will lead to brittle fracture of the rail, posing a great safety hazard ;4. There is no thickness scale in the longitudinal position of the grinding wheel, which is not conducive to intuitively judging whether the grinding wheel needs to be replaced

[0004] Chinese Patent No. CN201010298219.6 discloses a high-efficiency silicon carbide corundum rare earth ceramic composite grinding wheel and its manufacturing method, which solves the problems of low grinding effect and poor surface quality of existing grinding wheels on difficult-to-grind materials

[0007] However, it can be seen from the above patents that the existing grinding wheel does not improve the heat dissipation of the grinding wheel during work, and the grinding wheel with high strength and hardness causes deep wear marks on the processed surface, resulting in poor quality of the processed surface. For grinding wheels with inconspicuous grinding marks on the processed surface, the hardness and strength of the grinding wheel cannot be guaranteed. There is no thickness scale in the longitudinal position of the grinding wheel. The advantages are unified, and it is not conducive to intuitively judge whether the grinding wheel needs to be replaced

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