Manufacturing method of GH4169 alloy die forging

The technology of GH4169 and 1.GH4169 is applied in the field of manufacturing of GH4169 alloy die forgings, which can solve the problems of long heating time of blanks, cumbersome manufacturing process and low manufacturing efficiency, so as to reduce production cost, improve material utilization rate and improve production efficiency. Effect

Pending Publication Date: 2022-04-01
中国第二重型机械集团德阳万航模锻有限责任公司
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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.

Method used

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  • Manufacturing method of GH4169 alloy die forging
  • Manufacturing method of GH4169 alloy die forging
  • Manufacturing method of GH4169 alloy die forging

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Embodiment 1-5

[0062] In this experiment, the key core rotating disk of a certain type of machine is developed as a typical low-pressure first-stage turbine disk. The weight of the forging is about 200kg, the largest outer dimension is about Φ600×130mm, and the largest projected area is about 0.28m 2 , the structure performance and process stability of forgings have high requirements:

[0063] like Figure 6 The radial and axial grain size of the six positions N1 to N6 of the forging must be equal to or finer than 10.0 grade, such as Figure 7 The radial and axial grain sizes of the six positions P1 to P6 of the forging must be equal to or finer than 10.0 grades, and the grain size difference of all positions shall be ≤2.0 grades. Tensile properties at room temperature: σ b ≥1450MPa, σ 0.2 ≥1240MPa, δ 5 ≥10%, ψ≥15%; 650°C high temperature tensile properties: σ b ≥1170MPa, σ 0.2 ≥1000MPa, δ 5 ≥12%, ψ≥15%; and the strength difference between forgings is controlled within △σ b ≤100MPa. ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J13/02B21J13/08B21J5/02
Inventor 刘洋谢静孙朝远杨伟刘德建景春红叶林伟
Owner 中国第二重型机械集团德阳万航模锻有限责任公司
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