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Vidp+vhcc dual production method of powder superalloy master alloy and powder superalloy master alloy

A high-temperature alloy and master alloy technology, which is applied in the field of metallurgy, can solve the problems of inability to transplant from multiple processes, complicated operation process, master alloy pollution, etc., and achieve the effect of good floating effect, simple process and high purity

Active Publication Date: 2022-02-11
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In these preparation processes, the smelted molten steel passes through the launder and is poured into the steel mold by top casting. During the casting process, the inclusions floating on the surface of the molten steel and the launder are inevitably Non-metallic materials brought into the ingot, resulting in contamination of the master alloy
The triple smelting process can produce high-clean powder superalloy electrode rods, but the operation process is complicated and the cost is expensive, which is limited to laboratory exploration
In addition, due to the small cross-sectional size of the powdered superalloy master alloy, it is impossible to directly transplant the multi-link process successfully applied in the field of deformed superalloys. It is necessary to solve the ESR or VAR preparation process of the superalloy ingot with a small cross-sectional size.

Method used

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  • Vidp+vhcc dual production method of powder superalloy master alloy and powder superalloy master alloy
  • Vidp+vhcc dual production method of powder superalloy master alloy and powder superalloy master alloy
  • Vidp+vhcc dual production method of powder superalloy master alloy and powder superalloy master alloy

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preparation example Construction

[0068] In an optional embodiment, the preparation method of the slag comprises: melting the raw material of the slag, then water quenching, cooling, and crushing to obtain the slag.

[0069] Specifically, the following operations can be followed: high-purity CaO, MgO, CaF 2 、Al 2 o 3 、TiO 2 , ZrO 2 , CeO 2 The reagents were weighed in proportion and put into a tube furnace, and kept at 1500°C for 30 minutes to ensure complete melting and homogeneity. After the molten slag sample was taken out, it was quenched in water and ground into powder for use.

[0070] In an optional embodiment, the bottom air supply element is an annular slot type bottom blowing air supply element;

[0071] In an optional embodiment, the annular slot type bottom blowing air supply element includes a first air supply point, a second air supply point and a third air supply point, and the first air supply point is set at the VIDP The 0.45D circumference of the molten pool of the furnace is arranged a...

Embodiment 1

[0087] Such as figure 1 As shown, the present embodiment provides a kind of smelting equipment, comprises VIDP furnace and continuous casting facility, and VIDP furnace comprises vacuum chamber and is placed in the melting pool of vacuum chamber; The top of vacuum chamber is provided with feeding funnel 1, vacuum valve 2, vacuum meter 3. The feeding funnel 1 is set corresponding to the molten pool, and the upper periphery of the molten pool is provided with an induction coil 4 for inductively heating the material in the molten pool. During the smelting process, the molten metal 5 is placed in the lower part of the molten pool, and the bottom of the molten pool is set There is a bottom gas supply element 6, and the slag 7 is placed on the top of the molten metal 5; a crystallizer is provided on the lower side of the molten pool, and the crystallizer adopts a graphite mold 8 and a water-cooled copper mold 9, and the crystallizer is along the direction of the molten metal flow A ...

Embodiment 2

[0118] (1) Ingredients:

[0119] The components of the vacuum horizontal continuous casting slag system and their mass percentages are CaO: 24%, Al 2 o 3 : 20%, MgO: 3%, CaF 2 : 48%, TiO 2 : 2%, ZrO 2 : 2%, CeO 2 :1%. High purity CaO, MgO, CaF 2 、Al 2 o 3 、TiO 2 , ZrO 2 , CeO 2 The reagents were weighed in proportion and put into a tube furnace, and kept at 1500°C for 30 minutes to ensure complete melting and homogeneity. After the molten slag sample was taken out, it was quenched in water and ground into powder for use.

[0120] The powdered superalloy material is made of high-quality raw materials, the purity of the raw materials is ≥99.99%, and the components and mass percentages are C: 0.05%, Cr: 16.50%, Co: 13.00%, W: 4.10%, Mo: 4.10%, Al: 2.30%, Ti: 3.90%, Nb: 0.70%, B: 0.015%, Zr: 0.050%, Ce: 0.010%, Ni according to the balance, all raw materials are washed with alcohol and then baked.

[0121] (2) Loading:

[0122] Put pre-dried Cr, Co, W, Mo, Nb, Ni and ...

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Abstract

The present application provides a method for dual production of powder superalloy master alloy by VIDP+VHCC and powder superalloy master alloy. VIDP+VHCC dual production method of powder superalloy master alloy, comprising: using VIDP furnace to smelt the raw material of powder superalloy master alloy, then adding slag material, blowing argon gas through the gas supply element at the bottom of VIDP furnace at the same time to carry out slag Gold reaction; when the slag-gold reaction is completed and reaches the casting temperature, vacuum horizontal continuous casting is carried out to obtain the powder superalloy master alloy billet. The powder superalloy master alloy is prepared by using the VIDP+VHCC dual production method for powder superalloy master alloy. The VIDP+VHCC dual production method of powder superalloy master alloy provided by this application can significantly improve the purity of the alloy, improve the mechanical properties and thermal process properties of the alloy, and achieve the goal of improving the yield, service life and reliability of the powder superalloy Require.

Description

technical field [0001] The application relates to the field of metallurgy, in particular to a method for dual production of powder superalloy master alloy by VIDP+VHCC and powder superalloy master alloy. Background technique [0002] Powder superalloy is the key material for manufacturing advanced aerospace engine hot end parts (turbine disk), its advantages are no macro segregation, uniform structure, fine grain, excellent mechanical properties (high temperature strength, fatigue performance, etc.) performance, thus effectively ensuring the reliability and durability of the engine. At present, with the continuous improvement of the thrust-to-weight ratio of my country's aero-engines, there are higher requirements for the performance of powdered superalloys, which in turn poses new challenges to the purity of the alloys. However, non-metallic inclusions, as defects in powder superalloys, will cause stress concentration around them, cause cracks and holes, lead to alloy fati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/05C22C1/02C22C1/06B22D11/045B22D11/113
Inventor 杨树峰袁艺赵朋杨曙磊刘威李京社
Owner UNIV OF SCI & TECH BEIJING
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