The invention relates to a hot
extrusion forming method of a
copper alloy rail. The method includes the following steps that 1, blank
processing is performed, specifically, (1) forged polished blank round steel is sawn; (2) the center of the blank is drilled; (3) turning
machining and
polishing of the outer surface and the head are performed; 2, blank heating is performed, specifically, the
heating temperature ranges from 900 DEG C to 950 DEG C; 3, tool and mold preparation is performed, specifically,
extrusion molds with the same shapes are adopted; 4,
lubrication is performed, specifically,the
extrusion molds, manipulators and extrusion cylinders are coated with lubricants; 5, hot extrusion is performed, specifically, hot extrusion forming is performed on the blank; 6, cooling is performed, specifically, the
copper alloy rail is cooled to the
room temperature; 7,
solid solution heat treatment is performed, specifically, the
heating temperature ranges from 930 DEG C to 950 DEG C; 8,inspection is performed, specifically, the
hardness and the
conductivity are inspected; 9, straightening is performed, specifically, the
copper alloy rail is straightened; 10, cold drawing is performed, specifically, cold drawing is performed on the
copper alloy rail; 11, aging heat treatment is performed; 12, the section
hardness,
conductivity and room-temperature tensile strength are inspected;and 13, straightening is performed. According to the method, one-time forming of the workpiece is guaranteed through optimization of the mold design and the extrusion forming process, the surface quality of the manufactured
copper alloy rail is good, and the physical, chemical and mechanical properties of the product are improved.