Manufacturing method of GH4169 alloy die forging

Abstract

The invention relates to a manufacturing method of a GH4169 alloy die forging, and belongs to the technical field of forging and pressing. The manufacturing method of the GH4169 alloy die forging comprises the steps that the bottom face of a deep cavity of a die is made into an inclined face, the inner circle height h of the deep cavity is equal to 5 + (0-3) L / H, H is the depth of the deep cavity, L is the theoretical die orifice width of the deep cavity, and the unit of h is mm; a middle boss of the die is designed to be raised, the height distance between a rough machining delivery piece and a cake blank positioning contact cavity is + 10-+ 30 mm, and the width distance between the rough machining delivery piece and the cake blank positioning contact cavity is 20-50 mm. The forge piece prepared through the method is good in performance, and the grain structures at the bottom of the deep cavity and the sharp corner of the inner circle of the forge piece are also good.

Description

technical field [0001] The invention relates to a method for manufacturing a GH4169 alloy die forging, belonging to the technical field of forging. Background technique [0002] The GH4169 alloy has excellent characteristics such as high temperature resistance and corrosion resistance. It is widely used as the backbone material in high-thrust aero-engines. However, due to its high sensitivity to forging parameters such as temperature, the forging process is not easy to control, and it is easy to appear due to improper control of the forging process. brought waste. In order to improve the qualified rate of forgings, the existing method is often to adopt the mode of isothermal die forging or common die forging + sheathing for production. Although the forging performance of the isothermal die forging process is good, there are problems such as cumbersome manufacturing process, low manufacturing efficiency, and high cost; ordinary die forging is generally carried out in the for...

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Problems solved by technology

Although the forging performance of the isothermal die forging process is good, there are problems such as cumbersome manufacturing process, low manufacturing efficiency, and high cost; ordinary die forging is generally carried out in the form of insulation cotton wrapping, although the problem of temperature drop can be solved, but there is a problem of blank heating. The problem of long time and low production efficiency, and after forging, due to the insulation cotton bonded to the surface of the forging, it cannot be completely removed and the cooling is slow, resulting in low performance and other shortcomings.

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