Pre-molten slag for smelting electroslag remelting continuous directional solidification high-temperature alloy ingot and application thereof

A technology of directional solidification and electroslag remelting, applied in the field of superalloy smelting, can solve the problems of inability to meet the smelting needs of continuous directional solidification by electroslag remelting, uneven axial composition of ingots, and changes in element content, etc. To ensure the uniformity of chemical composition, improve the unevenness of composition, and improve the effect of surface quality

Inactive Publication Date: 2020-05-19
BEIJING CISRI GAONA TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Elements such as Ti, Al, and Zr are relatively active, and are easily oxidized and burned during the smelting process, resulting in uneven axial composition of the ingot, and precise control cannot be achieved during the electroslag process. Constant changes in the reaction temperature of stable oxides, metals and slag lead to more changes in the content of elements in electroslag ingots
The continuous directional solidification of electroslag remelting is an ingot-drawing electroslag furnace. The in

Method used

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  • Pre-molten slag for smelting electroslag remelting continuous directional solidification high-temperature alloy ingot and application thereof
  • Pre-molten slag for smelting electroslag remelting continuous directional solidification high-temperature alloy ingot and application thereof
  • Pre-molten slag for smelting electroslag remelting continuous directional solidification high-temperature alloy ingot and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0034] Example 1

[0035] Electroslag remelting of GH4096 alloy and continuous directional solidification ingot smelting

[0036] This embodiment uses the pre-melted slag provided by the present invention to carry out the electroslag remelting and continuous directional solidification smelting process of the superalloy GH4096 containing titanium and zirconium to obtain the GH4096 alloy ingot. The smelting process includes the following steps:

[0037] S1. The raw material components of the pre-melted slag are baked in a slag baking furnace at 650°C for 8 hours, where the pre-melted slag contains the following components by weight:

[0038]

[0039] S2. The slagging furnace is used to fully melt the baked slag. The amount of slag in the slagging furnace is 25kg, the slagging voltage is 46V, and the slagging current is 3750A;

[0040] S3. The molten slag after slagging is placed in the electroslag remelting continuous directional solidification device disclosed in the application publicat...

Example Embodiment

[0043] Example 2

[0044] According to the electroslag remelting continuous directional solidification smelting process provided in Example 1, GH4096 alloy ingots are obtained, except that the pre-melted slag in step S1 contains the following components by weight percentage:

[0045]

Example Embodiment

[0046] Example 3

[0047] According to the electroslag remelting continuous directional solidification smelting process provided in Example 1, GH4096 alloy ingots are obtained, except that the pre-melted slag in step S1 contains the following components by weight percentage:

[0048]

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Abstract

The invention discloses a pre-molten slag for smelting an electroslag remelting continuous directional solidification high-temperature alloy ingot and application thereof. The pre-molten slag comprises, by weight, 50%-60% of CaF2, 15%-25% of Al2O3, 15%-25% of CaO, 1%-5% of MgO, 0.5%-5% of TiO2, 0.5%-5% of ZrO2 and the balance impurities. The pre-molten slag is applied to high-temperature alloy ingot smelting by adopting an electroslag remelting continuous directional solidification technology. An application method comprises the following steps that the pre-molten slag is baked; the pre-moltenslag is fully molten through a slag melting furnace; and the molten pre-molten slag is transferred into a crystallizer of an electroslag remelting continuous directional solidification device, consumable electrodes are inserted into the crystallizer for smelting, and the high-temperature alloy ingot is obtained. According to the pre-molten slag for smelting the electroslag remelting continuous directional solidification high-temperature alloy ingot and application thereof, the pre-molten slag can effectively control active element burning losses, ensure the chemical component uniformity and especially inhibit the burning losses of titanium and zirconium and can ensure electroslag remelting continuous conducting, the pre-molten slag is applied to smelting of the high-temperature alloy ingot, the ingot obtained by adopting the method is uniform in axial component, and the surface quality of the ingot is improved.

Description

technical field [0001] The invention relates to the technical field of superalloy smelting, more specifically, it relates to a pre-melted slag for electroslag remelting continuous directional solidification superalloy ingot smelting and its application. Background technique [0002] Nickel-based wrought superalloys usually have a maximum service temperature range of 650°C-800°C. Due to their excellent comprehensive mechanical properties, they are used as hot end parts of aviation and aerospace engines. In order to adapt to the improvement of engine performance, superalloy materials are constantly adding more types of alloying elements to improve the temperature bearing capacity, so the preparation process of the material is more difficult, in which the chemical composition and element segregation structure of the superalloy ingot smelting process The control of superalloys is crucial to the preparation and properties of superalloy materials. [0003] In the prior art, elect...

Claims

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Application Information

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IPC IPC(8): C22B9/18
CPCC22B9/18
Inventor 付锐孟令超李福林冯滌
Owner BEIJING CISRI GAONA TECH
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