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A method for segmental bulging of superalloys

A high-temperature alloy and bulging technology, applied in the field of forging technology, can solve the problems of low production efficiency, poor product consistency, and low yield, and achieve the effect of easy rounding and regular size

Active Publication Date: 2020-06-23
WUXI PAIKE HEAVY CASTING & FORGING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the production efficiency of the existing technology is low, the finished product rate is low, and the consistency of the product is extremely poor

Method used

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  • A method for segmental bulging of superalloys

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Experimental program
Comparison scheme
Effect test

Embodiment

[0030] Step S1: heating. Heating the forged superalloy ring forging to 1050°C±10°C. The holding time after heating to the solid solution temperature and the solid solution holding time during the forging forming process are both 2h.

[0031] Step S2: First bulging. Put one end of the forging into the bulging die of the bulging machine, and the outer circle of the bulging die contacts the inner hole of the forging. Start the bulging machine, so that the bulging die moves outward and gradually contacts the forging. The bulging die presses the inner wall of the forging radially. The inner and outer diameter dimensions of one end of the forging are enlarged. The wall thickness of the forging is reduced. Specifically, during bulging, the mandrel moves downward under the action of axial pressure. Since the outer side of the mandrel is tapered, the bracket is pushed to move horizontally along the slide rail, and the punch moves along the horizontal direction with the bracket, an...

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Abstract

The invention relates to a high-temperature alloy segment bulging method. The method comprises the following steps that S1, heating is conducted, specifically, high-temperature alloy ring forgings subjected to forging and molding are heated to a solution temperature, and then heat preservation is conducted; S2, first bulging is conducted, specifically, one end of each forging is sleeved with a bulging die of a bulging machine, an outer circle of the bulging die makes contact with an inner hole of each forging, the bulging machine is started, the bulging die is moved outwards and makes contactwith the forgings one by one, the bulging die extrudes the inner walls of the forgings in the radial direction, the forgings are plastically deformed, in the first bulging process, the bulging temperature is lower than or equal to 900 DEG C, the bulging time is 3 min, and the pressure maintaining time is 10 s; S3, second bulging is conducted, specifically, the forgings are taken out and turned over, and the other end of each forging is bulged according to S2; and S4, cooling is conducted, specifically, the forgings are air-cooled to the room temperature, and the size of the forgings is checked. The method is used for machining high-temperature alloy tubular parts with the axial length being greater than or equal to 1600 mm.

Description

technical field [0001] The invention relates to the technical field of forging technology, in particular to a segmental bulging method of a superalloy. Background technique [0002] The publication number is CN102489593B, and the name of the document is "The thermal expansion method of aluminum alloy flash welding ring parts" discloses a thermal expansion method of aluminum alloy flash welding ring parts. On the periphery of the preheated bulging block in the bulging machine, the bulging block radially squeezes the ring to complete the first bulging, and the ring rotates 45° along the central axis, and then performs the second bulging according to the above operation; rotation After 45°, perform the third bulging according to the above operation. [0003] The axial length of the above-mentioned ring is 400mm±50mm. In the actual production process, because the axial length of the superalloy cylindrical part is ≥1600mm, the size is large, the forming is difficult, and the mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/06B21J13/02B21K1/76
Inventor 王骏刘峰刘智陈翠刘其源吴玉超许志成连忠礼
Owner WUXI PAIKE HEAVY CASTING & FORGING