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Quasi-isothermal forging of a nickel-base superalloy

A technology of superalloy and nickel-based alloy, applied in metal processing equipment and other directions, can solve the problems of increasing the complexity and cost of the forging process

Inactive Publication Date: 2007-06-06
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The requirement for a vacuum or inert gas environment adds significantly to the complexity and cost of the forging process

Method used

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  • Quasi-isothermal forging of a nickel-base superalloy
  • Quasi-isothermal forging of a nickel-base superalloy
  • Quasi-isothermal forging of a nickel-base superalloy

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Experimental program
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Embodiment Construction

[0017] Figure 1 shows a preferred method for practicing the invention. In step 20 a forging blank is provided. The forging blank is made of a wrought nickel-based alloy, preferably a wrought nickel-based superalloy. Herein, an alloy is referred to as a nickel-based alloy when it has more nickel than any other element, and as a nickel-based superalloy when it is strengthened by the precipitation of gamma prime or related phases. Any available wrought nickel-based alloy can be used. Nickel-based superalloys of particular interest for use as forging blanks are Rene TM 95 alloy having by weight about 8% cobalt, about 14% chromium, about 3.3% molybdenum, about 3.5% tungsten, about 3.5% aluminum, about 2.5% titanium, about 3.5% niobium, The nominal composition is about 0.05% zirconium, about 0.07% carbon, about 0.01% boron, and the balance is nickel and trace elements.

[0018] Nickel-based superalloys can be supplied in any practicable form, such as cast-forged billets or cons...

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Abstract

A forging blank (56) of a forging nickel-base superalloy is forged in a forging press (40) having forging dies (52,54) made of a die nickel-base superalloy. The forging is accomplished by heating the forging blank (56) to a forging-blank starting temperature of from about 1850 DEG F to about 1950 DEG F, heating the forging dies (52,54) to a forging-die starting temperature of from about 1500 DEG F to about 1750 DEG F, placing the forging blank (56) into the forging press (40) and between the forging dies (52,54), and forging the forging blank (56) at the forging-blank starting temperature using the forging dies (52,54) at the forging-die starting temperature, to produce a forging (58).

Description

technical field [0001] This invention relates to forging of nickel-based superalloys, and more particularly to such forging in air. Background technique [0002] Nickel-based superalloys are used in components of aircraft gas turbine engines that have the most demanding performance requirements and experience the harshest environmental conditions. Castable nickel-based superalloys are used, for example, as turbine blades or turbine guide vanes. Wrought nickel-based superalloys are used, for example, as rotor disks and rotor shafts. The invention relates to a wrought nickel-based superheat-resistant alloy. [0003] Wrought nickel-base superalloys were initially supplied as cast-consolidated billets cast from molten metal or consolidated powder billets formed from powder consolidation. Powder consolidated compacts are preferred as raw material for most applications due to their uniform and well-controlled initial structure and finer grain size. In any case, in a metalworki...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/00C22C19/05C22F1/10B21J1/06C22CC22C19/03
CPCC22F1/10B21J5/00B21J1/06
Inventor E·L·雷蒙R·G·门兹斯T·O·戴尔B·A·林克R·F·哈尔特M·E·梅克利F·M·维萨利S·K·斯里瓦特萨
Owner GENERAL ELECTRIC CO