A kind of preparation method of gh4738 alloy homogeneous crystal ring forging
A ring forging and alloy technology, which is applied in the field of GH4738 alloy forming, can solve the problems of difficult forging and forming of special-shaped rings, etc.
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[0027] The invention provides a method for preparing a GH4738 alloy homogeneous ring forging, comprising the following steps:
[0028] Upsetting, punching, ring rolling, solution treatment and aging treatment are carried out sequentially on the GH4738 alloy billet to obtain a GH4738 alloy homogeneous ring forging;
[0029] The ring rolling includes pre-rolling and final rolling in sequence, the starting temperature of the pre-rolling and final rolling is independently 1075-1085°C, and the billet temperature during the pre-rolling and final rolling is above 1040°C; The deformation of the pre-rolling is more than 25%, and the deformation of the finishing rolling is 20-35%.
[0030] The invention performs upsetting on the GH4738 alloy billet. The present invention has no special requirements on the specifications of the GH4738 alloy blank, and those skilled in the art can select according to actual needs. In the present invention, the upset cake is preferably carried out on a h...
Embodiment 1
[0041] To prepare a special-shaped ring forging, the specific steps are:
[0042] Upsetting the cake at 1085°C, so that the GH4738 alloy billet is deformed by 51% from Φ150*241mm, and the temperature of the roll is 275°C. The hole diameter is Φ190mm, the punching process is carried out on a hydraulic press, the pressing speed of the hydraulic press is 10mm / s, and the roll temperature is 300°C; the size of the blank obtained after punching the upset cake is as follows figure 1 shown;
[0043] Two-fire pre-rolling, the first fire rolling temperature is 1082°C, the roll temperature is 300°C, the second fire start rolling temperature is 1080°C, the roll temperature is 280°C, the pre-rolling process is carried out on the ring rolling mill, and the main roll speed is 0.5rad / s, the feed speed of the core roll is 1mm / s, the first fire deformation is 34.8%, and the second fire deformation is 25.3%; the billet temperature in the pre-rolling process is not lower than 1040°C; the size a...
Embodiment 2
[0049] To prepare a special-shaped ring forging, the specific steps are:
[0050] Upsetting the cake at 1082°C, so that the GH4738 alloy billet is deformed by 47.9% from Φ149*193mm, and the temperature of the roll is 305°C. The hole diameter is Φ190mm, the punching process is carried out on the hydraulic press, the pressing speed of the hydraulic press is 10mm / s, and the roll temperature is 305°C;
[0051] First-fire pre-rolling, the starting temperature is 1081°C, the roll temperature is 301°C, the pre-rolling process is carried out on the ring rolling mill, the main roll speed is 0.5rad / s, the core roll feed speed is 1mm / s, and the deformation is 35.1% ;The billet temperature in the pre-rolling process is not lower than 1040°C;
[0052] Final rolling, the final rolling is carried out at 1079°C, and the forging is finally formed; the roll temperature is 275°C, the final rolling process is carried out on the ring rolling mill, the main roll speed is 0.5rad / s, the core roll fe...
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