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A Method for Reducing Forging Cracking Tendency of Superalloy Materials

A high-temperature alloy and tendency technology, used in metal processing equipment and other directions, can solve the problems of difficult deformation, low yield, easy forging cracking, etc., and achieve the effect of improving forging cracking tendency

Active Publication Date: 2018-06-12
SICHUAN JIANGYOU LIUHE STEAM TURBINE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, this high-temperature alloy material has the characteristics of being difficult to deform and easy to crack when forged, and the yield rate during production is very low, generally around 20%, which makes the production cost very high and causes great difficulties to production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) at first wrap up the steel ingot to be forged with asbestos cloth;

[0021] (2) heat the steel ingot wrapped in step (1) in a bell furnace, keep it warm for 10 hours, make the temperature of the steel ingot uniform, and then take it out by a reclaimer;

[0022] (3) forging the steel ingot that step (2) takes out, forging 4-5 fire times, the deformation amount of every fire time is controlled as 15%, makes steel billet;

[0023] (4) return the steel billet made in step (3) to the furnace and burn it at 1180° C., keep it warm for 40 hours, and then take it out;

[0024] (5) the steel billet that step (4) is taken out is carried out forging, and the amount of deformation of each firing time is controlled to be 20%, until forging becomes a useful material;

[0025] The yield of this embodiment is 62%.

Embodiment 2

[0027] (1) at first wrap up the steel ingot to be forged with asbestos cloth;

[0028] (2) heat the steel ingot wrapped in step (1) in a bell furnace, keep it warm for 16 hours, make the temperature of the steel ingot uniform, and then take it out by a reclaimer;

[0029] (3) forging the steel ingot that step (2) takes out, forging 4-5 fire times, the deformation amount of every fire time is controlled as 20%, makes steel billet;

[0030] (4) return the steel billet made in step (3) to the furnace and burn it at 1180°C, keep it warm for 50h, and then take it out;

[0031] (5) the steel billet that step (4) is taken out is forged, and the amount of deformation of each firing is controlled to be 25%, until forging becomes a useful material;

[0032] The yield of this embodiment is 68%.

Embodiment 3

[0034] (1) at first wrap up the steel ingot to be forged with asbestos cloth;

[0035] (2) heat the steel ingot wrapped in step (1) in a bell furnace, keep it warm for 15 hours, make the temperature of the steel ingot uniform, and then take it out by a reclaimer;

[0036] (3) Forging the steel ingot that step (2) takes out, forging 4-5 firing times, the deformation amount of every firing times is controlled as 18%, makes steel billet;

[0037] (4) return the steel billet made in step (3) to the furnace and burn it at 1180°C, keep it warm for 50h, and then take it out;

[0038] (5) the steel billet that step (4) is taken out is forged, and the amount of deformation of each firing is controlled to be 23%, until forging becomes a useful material;

[0039] The yield of this embodiment is 65%.

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Abstract

The invention discloses a method for reducing the forging cracking tendency of a high temperature alloy material, and belongs to the technical field of high temperature alloy materials.The method comprises the following steps that firstly, steel ingots to be forged are bound with asbestos cloth; secondly, the steel ingots bound in the step 1 are heated, heat preservation is performed for 10-16 h to enable the temperature of the steel ingots to be uniform, and then the steel ingots are taken out; finally, the steel ingots taken out in the step 2 are forged, and the deformation amount of every heating time is controlled to be about 20% during forging.According to the method, the forged finished product rate is increased to 60% or above from original about 20%, the method is particularly suitable for forging of GH4049, and the material can be better forged and delivered to a user for use.

Description

technical field [0001] The invention relates to alloy materials, in particular to a high-performance heat-resistant steel, its preparation method and its application. Background technique [0002] With the vigorous development of aerospace, some high-temperature alloys have been widely used as the main materials of engine turbine blades, and the amount is increasing year by year. [0003] Among them, GH4049, which is widely used, is a nickel-based hard-to-deform superalloy. Typical chemical composition of GH4049, calculated by mass percentage: C 0.04-0.10%, Cr 9.5-11.0%, Co 14.0-16.0%, W 5.0-6.0%, Al 3.7-4.4%, Ti 1.4-1.8%, V 0.2-0.5%, B≤0.025%, Fe≤1.50%, Mn≤0.50%, Si≤0.50, P≤0.10%, S≤0.10%, Bi≤0.0001%, Sn≤0.0012%, Cu≤0.07%, Sb ≤0.0025, Ce≤0.02, Pb≤0.001, and the balance is Ni; this high-temperature alloy material has better high-temperature mechanical properties. [0004] However, this high-temperature alloy material is difficult to deform and easy to crack when forged, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/00B21J1/06
CPCB21J1/06B21J5/00
Inventor 李建雷德江丁勇张华国
Owner SICHUAN JIANGYOU LIUHE STEAM TURBINE MATERIAL