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Novel high-temperature alloy ring forged piece ring rolling speed control method

A high-temperature alloy, speed control technology, applied in metal rolling, roll speed control, metal rolling and other directions, can solve the problem of high product scrap rate, achieve the effect of high uniform grain size, stable deformation speed, and improved yield

Active Publication Date: 2020-06-05
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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  • Novel high-temperature alloy ring forged piece ring rolling speed control method

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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 high-temperature alloy ring forged piece ring rolling speed control method, and belongs to the technical field of high-temperature alloy ring rolling technologies. According to the technical scheme, the method comprises the following steps that S1, heating treatment is conducted, specifically, a forged piece is put into a heating furnace to be heated; S2, roller preheating is conducted, specifically, a main roller, a core roller, a holding roller and a conical roller are preheated before ring rolling; S3, a ring rolling engagement stage is performed, specifically, the linear speed of the main roller is controlled to be 800-900 mm / s, the radial feeding speed of the core roller is 0.8-1.2 mm / s, and the rotation speed of the conical roller is 8.2-9.2 rad / s; S4,a first rolling stage is performed, specifically, the linear speed of the main roller is controlled to be 900-1000 mm / s, the radial feeding speed of the core roller is 0.5-0.6 mm / s, and the rotationspeed of the conical roller is 8.0-9.0 rad / s; and S5, a second rolling stage is performed, specifically, the linear speed of the main roller is controlled to be 1000-1100 mm / s, the radial feeding speed of the core roller is 0.3-0.4 mm / s, and the rotation speed of the conical roller is 8.0-8.5 rad / s. The novel high-temperature alloy ring forged piece ring rolling speed control method has the advantages that the ring rolling speed is more precise, and the rate of finished products 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 Applications(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