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IN718 alloy structure optimization method based on three-dimensional wall vibration type controllable ultrasonic field device

A technology of IN718 and alloy structure, which is applied in the field of IN718 alloy structure optimization, can solve the problems of incapable of real-time feedback and control of ultrasonic parameters and effects, lack of sound field information measurement, and inability to deal with it, so as to improve smelting efficiency, avoid environmental pollution, expand Effect of heat resistance and material type

Active Publication Date: 2022-07-22
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the application limitations of power ultrasound in the solidification process of IN718 alloy are as follows: ①Due to the limitation of the temperature resistance of the ultrasonic rod in contact with the melt, it is still impossible to use power ultrasound to treat the IN718 superalloy with a melting temperature of 1400-1600 °C. Therefore, it is difficult to effectively control the primary γ phase, Laves phase, and MC equal organization
②Lack of measurement of the sound field information in the melt during ultrasonic treatment, and real-time feedback control of ultrasonic parameters and effects

Method used

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  • IN718 alloy structure optimization method based on three-dimensional wall vibration type controllable ultrasonic field device
  • IN718 alloy structure optimization method based on three-dimensional wall vibration type controllable ultrasonic field device
  • IN718 alloy structure optimization method based on three-dimensional wall vibration type controllable ultrasonic field device

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preparation example Construction

[0071] In the present invention, the preparation method of the upper crucible 2 and the lower crucible 4 preferably includes: 2 O 3 The forming crucible is placed in the knotted lining, and the graphite core is placed in the Al 2 O 3 In the forming crucible, a slurry made of silica sol and sand is used to fill the gap, and the induction furnace is energized to dry the slurry and sinter it into a crucible. In the present invention, the upper crucible 2 and the lower crucible 4 are placed up and down, and the upper crucible 2 is located above. In the present invention, the sintering temperature is preferably 300°C; the sintering time is preferably 24h.

[0072] In the present invention, the charging sequence of the upper crucible 2 is preferably: Cr, Nb and Mo are charged first, and then C is added after they are completely melted; the charging sequence of the lower crucible 4 is preferably: Al, Cu, Mn, Co, Si and Ti are sequentially loaded after the Fe and Fe are completely...

Embodiment 1

[0101] The flow chart of the microstructure optimization method of IN718 alloy based on the three-dimensional wall-vibration controllable ultrasonic field device in this embodiment is as follows: figure 1 shown. The schematic diagram of the three-dimensional wall-vibration controllable ultrasonic field device is shown in Fig. Figures 2 to 4 shown.

[0102] Step 1. First, make the upper crucible 2 and the lower crucible 4, and make the Al 2 O 3 The forming crucible is placed in the knotted lining, and the graphite core is placed in the Al 2 O 3 In the forming crucible, the gap between the silica sol and sand mixed slurry is filled, the upper crucible 2 and the lower crucible 4 are put into a resistance furnace, and the slurry is dried and sintered by baking at 300 ° C for 24 hours to obtain the upper crucible 2 and the lower crucible 4. Lower crucible 4. The upper crucible 2 and the lower crucible 4 are placed up and down, and the upper crucible 2 is located above.

[0...

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Abstract

The invention provides an IN718 alloy structure optimization method based on a three-dimensional wall vibration type controllable ultrasonic field device, and relates to the technical field of advanced material preparation and processing. According to the method, wall vibration type treatment is conducted on the IN718 alloy melt from the bottom of a casting mold through ultrasonic waves, a proper smelting-pouring-ultrasonic regulation and control scheme is formulated for the IN718 alloy, meanwhile, in order to guarantee the optimal effect of ultrasonic treatment, the sound field change rule in the melt in the solidification process is measured in real time, and the sound field change rule of the melt in the solidification process is measured in real time. And ultrasonic experiment parameters are regulated and controlled in real time through the measured total cavitation sound pressure level, so that the solidification structure of the IN718 alloy is regulated and controlled.

Description

technical field [0001] The invention relates to the technical field of advanced material preparation and processing, in particular to an IN718 alloy microstructure optimization method based on a three-dimensional wall vibration type controllable ultrasonic field device. Background technique [0002] Superalloys are commonly used for hot-end components in power machinery such as modern aviation, naval gas turbines, ground turbines, and aerospace engines. At present, the most widely used superalloy in the world is the IN718 alloy, which accounts for 35% of the total production of all superalloys. The microstructure of the as-cast IN718 alloy is composed of nickel-rich solid solution matrix (γ), discontinuous MC particles, and island-like Laves phase. The solidification sequence of IN718 alloy is: L→γ(1350℃), L→γ+MC(1290℃), L→Laves(1250℃). At present, the main problems of casting IN718 alloy are: ① the primary γ-phase dendrite is coarse; ② the precipitation of bulk eutectic L...

Claims

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Application Information

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IPC IPC(8): C22F3/02B22D27/20B22D2/00C22C1/02C22C19/05B22D27/04B22C9/06
CPCC22F3/02B22D27/20B22D2/00C22C1/023C22C19/056B22D27/04B22C9/061
Inventor 翟薇胡慧琴王建元魏炳波
Owner NORTHWESTERN POLYTECHNICAL UNIV
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