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A new speed control method for ring rolling of superalloy ring forgings

A high-temperature alloy and speed control technology, applied in the direction of roll speed control, metal rolling, metal rolling, etc., can solve the problem of high product scrap rate, achieve uniform and high grain size, reduce the risk of uneven grain size, Highly consistent quality results

Active Publication Date: 2022-04-01
WUXI PAIKE HEAVY CASTING & FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, for ring rolling, the actual experience of the operator is used to adjust the speed and complete the matching of the speed of each part, and the product scrap rate is high.

Method used

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  • A new speed control method for ring rolling of superalloy ring forgings

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Experimental program
Comparison scheme
Effect test

Embodiment

[0017] Embodiment: A kind of speed control method of ring rolling of novel superalloy ring forging, such as figure 1 shown, including:

[0018] S1. Heating treatment: firstly, the prepared original billet is opened to obtain a forging. The forging has an inner hole of 350 mm and the forging is ring-shaped. Then the staff wraps the forging with thermal insulation cotton. In order to increase the thermal insulation capacity of the forging and avoid rapid heat dissipation Case.

[0019] After that, the forgings are heated in a heating furnace. The heating temperature ranges from 980 to 1180°C, and the heating time of the forgings ranges from 2 to 3 hours. Under high temperature conditions (980-1180°C), the carbides in the superalloy will dissolve, and the carbon will dissolve into the lattice gap of the iron-based structure, which will further reduce the grain boundaries and help refine the grains. At the same time, the iron-based crystal structure will transform into α-phase, ...

experiment example

[0031] Experimental example: After each forging is finished, the staff will carry out subsequent processing on the forging. At this time, the leftovers are collected. The staff first cuts the leftovers, and then the staff cuts the section of the leftovers. Put the pattern under the electron microscope to take metallographic photos, and compare the metallographic photos with the standard series of rating charts to determine the grain size of the forging.

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PUM

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Abstract

The invention discloses a novel speed control method for ring rolling of a high-temperature alloy ring forging, which belongs to the technical field of high-temperature alloy ring rolling technology. The key points of the technical scheme include the following steps: S1, heating treatment: putting the forging in a heating furnace for heating; S2 , Roller preheating: preheat the main roll, core roll, holding roll, and cone roll before ring rolling; S3, ring grinding stage: control the line speed of the main roll to 800-900mm / s, and the radial feed of the core roll The speed is 0.8~1.2mm / s, the rotation speed of the cone roll is 8.2~9.2rad / s; S4, the first rolling stage: the line speed of the main roll is controlled to be 900~1000mm / s, and the radial feed speed of the core roll is 0.5~0.6mm / s, the rotation speed of the cone roll is 8.0~9.0rad / s; S5, the second rolling stage: control the line speed of the main roll to 1000~1100mm / s, the radial feed speed of the core roll is 0.3~0.4mm / s, the cone roll The rotation speed is 8.0-8.5 rad / s; the advantage of the present invention is that the ring rolling speed is more accurate and the product yield is high.

Description

technical field [0001] The invention relates to the technical field of high-temperature alloy ring rolling technology, in particular to a novel ring-rolling speed control method for high-temperature alloy ring forgings. Background technique [0002] Superalloys refer to a class of metal materials based on iron, nickel, and cobalt, which can work for a long time at high temperatures above 600°C and under certain stresses; and have high high-temperature strength, good oxidation resistance and corrosion resistance. Good fatigue performance, fracture toughness and other comprehensive properties. The superalloy is a single austenite structure, which has good structure stability and service reliability at various temperatures. Up to now, the annual consumption of high-temperature metal alloys in the international market is 300,000 tons, which are widely used in various fields: Over the past few years, the global aerospace industry has had a strong demand for new energy aircraft, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21H1/06B21B1/46B21B3/00B21B37/46B21D1/02B21D3/02B21B45/00B21B45/02
CPCB21H1/06B21B1/463B21B3/00B21B37/46B21D1/02B21D3/02B21B45/004B21B45/0203
Inventor 刘其源刘峰何方有艾志斌王骏何涛
Owner WUXI PAIKE HEAVY CASTING & FORGING