Hot working production process of bearing steel tube

Abstract

The invention is applicable to the technical field of hot working, and provides a hot working production process of a bearing steel tube. The process comprises the following steps of, 1, preparing a centrifugal blank, smelting and pouring an alloy into a mold to prepare a steel tube rough blank; and 2, pre-treating the tube blank, removing a slag layer on the surface of the rough blank, and carrying out ultrasonic cleaning on the tube blank. The purpose of thoroughly removing carbon deposits is achieved by combining the ultrasonic cavitation effect with the dissolution effect of the carbon deposits by a decarbonizer, the impact effect generated by the ultrasonic vibration in a liquid and the high-speed micro-jet generated by the ultrasonic cavitation on the solid interface and the liquid interface can remove or weaken the carbon deposits on the surface of the steel tube, and meanwhile, due to the ultrasonic stirring effect, the dissolution of the carbon deposits is accelerated, the chemical dissolution effect of the decarbonizer on the carbon deposits is enhanced, the carbon deposits on the surface of the steel tube is removed, so that the problems that the metal deformation of the inner surface of a hollow billet is severe, the internal structure is poor, the defects such as cracks and internal bending are easily generated during the cross piercing of the steel tube are avoided.

Description

technical field [0001] The invention belongs to the technical field of thermal processing, and in particular relates to a thermal processing production process of a bearing steel pipe. Background technique [0002] Thermal processing is a processing method that causes plastic deformation and recrystallization of metal materials at the same time under the condition of higher than the recrystallization temperature. Thermal processing usually includes casting, forging, welding, heat treatment and other processes. Thermal processing can make metal parts in the shape of At the same time, change its organization or change the established state of the formed part to improve the mechanical properties of the part. [0003] At present, the heat treatment process of high-strength bearing steel pipes is carried out in ordinary box furnaces. The surface is easy to oxidize and decarburize, and the grease on the surface cannot be completely cleaned. After heating, carbon deposits are prone...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a thermal processing production process of bearing steel pipes, which aims to solve the problem that the heat treatment process of bearing steel pipes is carried out in an ordinary box furnace, the surface is easy to oxidize and decarburize, the grease on the surface cannot be completely cleaned, and the surface of the parts is prone to occurrence after heating. carbon accumulation problem

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