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A kind of deformed superalloy containing zr-ce and preparation method thereof

A technology for deforming superalloys and alloys, which is applied in the field of superalloy smelting, and can solve the problems of unreasonable and accurate control of Zr smelting process, element burning loss, complex control of Zr and Ce elements, etc.

Active Publication Date: 2021-04-16
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the smelting process of deformed superalloys prepared by vacuum induction melting + electroslag remelting dual process, there are two main reasons why Zr and Ce elements cannot be reasonably and accurately controlled: one is that vacuum induction melting is a primary melting process for alloys, There are many impurity elements in the melt, and the yield of Zr and Ce elements is low
Second, in electroslag remelting, due to the high activity of Zr and Ce elements, they are easy to react with the oxides in the slag, resulting in burning loss of elements, which makes the control of Zr and Ce elements more complicated.
However, for deformed superalloys containing both Zr and Ce, there is still no reasonable and accurate smelting process to control the content of Zr and Ce and the smelting quality of the alloy.

Method used

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  • A kind of deformed superalloy containing zr-ce and preparation method thereof
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preparation example Construction

[0035] In a first aspect, the present invention provides a method for preparing a deformed superalloy containing Zr-Ce, said method comprising the steps of:

[0036] (1) Provide raw materials for preparing deformed superalloys containing Zr-Ce, the raw materials include matrix element raw materials and adjustment element raw materials, and the adjustment element raw materials include zirconium raw materials and cerium raw materials; in the present invention, the described raw materials containing The deformed superalloy of Zr-Ce refers to the deformed superalloy containing trace elements Zr and Ce at the same time; the present invention has no special requirements on the raw materials, and adopts the existing raw materials commonly used in the preparation of deformed superalloys and the composition ratio of each raw material In the present invention, taking the GH4710 deformed superalloy containing Zr-Ce as an example, the matrix element raw materials include, for example, chro...

Embodiment 1

[0061] This embodiment provides a method for preparing a Zr—Ce-containing GH4710 alloy, and the target content values ​​of each component in the GH4710 alloy are shown in Table 1 below.

[0062]

[0063] Described preparation method comprises the steps:

[0064] ①Equipment and material preparation: A 1t vacuum induction furnace is used to prepare raw materials according to the target composition ratio, among which electrode carbon (C) is prepared according to the total mass of GH4710 alloy containing Zr-Ce at 0.1%, sponge zirconium and cerium particles are prepared according to the target content value 110% preparation, that is, the preparation amount of sponge zirconium is 3.3% of the total mass of Zr-Ce-containing GH4710 alloy, and the preparation amount of cerium particles is 2.2% of the total mass of Zr-Ce-containing GH4710 alloy.

[0065] ②Chemical material stage: first add nickel plate, cobalt plate, tungsten strip, electrode carbon, and molybdenum block in proportion...

Embodiment 2

[0071] Embodiment 2 is basically the same as Embodiment 1, the difference is:

[0072] ②Chemical material stage: Add nickel plate, chromium block, cobalt plate, tungsten bar, electrode carbon, and molybdenum block at a time according to the proportion, vacuumize to 20Pa, and smelt with electricity. After melting, stir for 15 minutes to obtain the molten material to be refined.

[0073] Drilling chips at the head, middle and tail of the Zr-Ce-containing GH4710 alloy obtained in this embodiment, the specific positions are 50mm from the ingot head, 50mm from the ingot middle, and 50mm from the ingot tail, and detect the GH4710 alloy The Zr, Ce, N, and O contents at the head, middle, and tail positions are shown in Table 2.

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Abstract

The invention relates to a deformed superalloy containing Zr-Ce and a preparation method thereof. The method: prepare the raw materials; carry out vacuum induction smelting on the raw materials according to chemical material, refining and pouring in sequence: in the refining period, pre-add a small amount of zirconium and cerium to continue refining for 10 ~ 15 minutes, and detect the burning loss of zirconium and cerium; then add the remaining zirconium and cerium and the burned zirconium and cerium to continue refining for 10~15 minutes; during the pouring period, pour the refined alloy melt to obtain a vacuum induction ingot Carry out electroslag remelting to the vacuum induction ingot to obtain a deformed superalloy containing Zr-Ce; the slag material used in the electroslag remelting contains CaF 2 , CaO, Al 2 O 3 、TiO 2 , ZrO 2 and CeO 2 . The invention can be used to accurately control the contents of Zr and Ce elements in the alloy, and improve the purity of the alloy and the uniformity of element distribution.

Description

technical field [0001] The invention belongs to the technical field of superalloy smelting, and in particular relates to a deformed superalloy containing Zr-Ce and a preparation method thereof. Background technique [0002] Adding trace elements of Zr (zirconium) and Ce (cerium) to the deformed superalloy can significantly improve the durability of the alloy. The element Zr is segregated at the grain boundary to reduce grain boundary defects, increase grain boundary binding force, and reduce grain boundary diffusion rate, thereby slowing down dislocation climbing and strengthening grain boundaries. As a scavenger, Ce has the functions of deoxidation and desulfurization, and reduces the harmful effects of oxygen and sulfur on the grain boundary. In addition, Ce can improve the oxidation resistance of the alloy and increase the surface activity. However, too much Zr will increase the formation of harmful phases such as Lavese in the alloy, and too much Ce will also deteriorat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C16/00C22B9/18
CPCC22B9/18C22C1/02C22C16/00Y02P10/25
Inventor 杨树峰杨曙磊赵朋刘威贾雷王宁周杨徐志强
Owner UNIV OF SCI & TECH BEIJING
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