Hot extrusion forming method of stainless steel rail

Abstract

The invention relates to a hot extrusion forming method of a stainless steel rail. A hot extrusion forming system comprises machining equipment, heating equipment, lubricating equipment, hot extrusionequipment, a cooling bed, heat treatment equipment and inspection equipment. The hot extrusion forming method comprises the following steps: (1) blank processing: sawing a forged polished blank roundsteel, lathing and polishing the outer surface; (2) induction heating: heating the blank by a multi-section heating and temperature equalizing method; (3) tool and mold preparation: adopting an extrusion mold with the same hole pattern as the steel rail; (4) lubricating: lubricating the outer surface of the blank and extrusion mold glass; (5) hot extrusion: performing hot extrusion on the blank to form the steel rail; (6) cooling: carrying out air cooling on the extruded steel rail; (7) heat treatment: performing heat treatment on the steel rail; and (8) inspection: inspecting the surface quality, size, mechanical property and physicochemical property of the steel rail. By reasonably integrating the production process, the production process is optimized, the produced stainless steel railmeets the quality requirement, the production cost is reduced, and the economic efficiency of enterprises is improved.

Description

technical field [0001] The invention belongs to the technical fields of hot extrusion forming technology and special-shaped material manufacturing, and relates to a hot extrusion forming method of stainless steel rails. Background technique [0002] Steel rails are the main components of railway tracks. Its function is to guide the wheels of the rolling stock to move forward, receive the huge pressure of the wheels, and transmit them to the sleepers. The rails must provide the wheels with a continuous, smooth and least drag rolling surface. In the electrified railway or automatic blocking section, the rail can also be used as a track circuit. The section shape of the rail adopts the I-shaped section with the best bending resistance, which consists of three parts: the rail head, the rail waist and the rail bottom. In order to make the rail better withstand forces from all sides and ensure the necessary strength conditions, the rail should have sufficient height, its head a...

AI Technical Summary

Problems solved by technology

However, there are many difficulties in this forming method: any problem in the mold design, heating process, lubrication effect, etc. will lead to the scrapping of the rail.

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