A new type of alloy powder for rail repair and a method for repairing rail surface damage

Abstract

The invention relates to novel alloy powder for steel rail repairing and a method for repairing steel rail surface damage. The novel alloy powder for steel rail repairing comprises, by weight percent,0.8% to 1.5% of silicon, 0.61% to 1.5% of manganese, 0.1% to 0.15% of vanadium, 0.5% to 0.8% of copper, 0.45% to 0.7% of carbon and the balance iron. Chromium accounts for not larger than 0.4% of impurities contained in the novel alloy powder, sulphur accounts for not larger than 0.005%, and phosphorus accounts for not larger than 0.01%. The novel alloy powder for steel rail repairing has high strength, hardness and flexibility, and ahs good anti-corrosion capacity. According to the method for repairing steel rail surface damage, the alloy powder is adopted as a fusion covering material, a cladding layer forming on the damaged face of a steel rail through fusion covering is dense in structure, fine and even in grain and free of columnar crystal structure forms and has good tensile strength and yield strength, high impact absorption energy is achieved, and the repairing quality of the steel rail surface damage is guaranteed; and the method for repairing the steel rail surface damage ishigh in work efficiency and high in resource utilization rate.

Description

technical field [0001] The invention relates to a novel alloy powder for rail repair and a method for repairing rail surface damage, and belongs to the technical field of additive manufacturing. Background technique [0002] Additive Manufacturing (AM), commonly known as 3D printing, is a fusion of computer-aided design, material processing and forming technology, based on digital model files, through software and numerical control system to combine special metal materials, non-metal materials and medical biological Materials are piled up layer by layer according to extrusion, sintering, melting, photocuring, spraying, etc., to create a manufacturing technology for physical objects. Compared with the traditional processing mode of raw material removal-cutting and assembly, it is a "bottom-up" manufacturing method through material accumulation, starting from scratch. This makes it possible to manufacture complex structural parts that were restricted by traditional manufactur...

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Problems solved by technology

[0004] my country's railway operation is high-speed and heavy-duty, and the rail damage is becoming more and more serious. At present, the online repair process of the worn rail surface has problems such as low work efficiency, large waste of resources, insufficient impact toughness of the welding repair layer, and difficult guarantee of repair quality.

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