Process for manufacturing semi-solid steel cam shaft through radial forging strain induction method

Abstract

The invention discloses a process for manufacturing a semi-solid steel cam shaft through a radial forging strain induction method. The process comprises the following steps: preheating a steel bar material and preserving heat; radially forging the steel bar material; re-melting a radially-forged blank; performing extrusion casting on the steel cam shaft; performing subsequent treatment on the steel cam shaft. By adopting the process, steel semi-solid blanks which are uniform and free from micro-defects can be manufactured in batches, and the steel cam shaft which has less micro tissue defects, high mechanical performance and high wear resistance can be formed. The process flow is simple, and operation is easy.

Description

technical field [0001] The invention belongs to the technical field of semi-solid processing and forming, in particular to a process for preparing a semi-solid steel camshaft by a radial forging strain induction method. Background technique [0002] The camshaft is an important part of the engine's gas distribution mechanism. It is responsible for driving the valve to open and close on time to ensure that the engine regularly inhales fresh combustible gas into the cylinder and discharges the burned exhaust gas out of the cylinder in time. Traditional camshafts are mostly produced by casting or forging, and combined camshafts are also partially used. Cast camshafts mainly include chilled cast iron, quenched cast iron, etc. The machining allowance of the camshaft formed by the casting process is large, the size is rough, the amount of subsequent machining is increased, and the cost is high. In recent years, various forms of camshafts such as remelted chilled cast iron and qu...

AI Technical Summary

Problems solved by technology

However, for ferrous metals, the process of preparing aluminum alloy semi-solid slurry by conventional mechanical stirring method and electromagnetic stirring method has the following disadvantages: high temperature has a serious corrosion effect on the mechanical stirrer, and the corrosion residue is mixed with the semi-solid slurry. lead to the impurity of the obtained slurry

The above-mentioned methods all have limitations on the volume of the deformed material. If the volume of the deformed material is too large, the deforming force will be too large, and it is difficult to prepare the required semi-solid blanks in batches on existing equipment.

And so far it has not involved high melting point ferrous metals such as steel

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