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Low-pressure mold-filling and high-pressure solidification casting device used for pressure adjusting and pressurizing casting machine and casting method

A casting machine and low-pressure technology, applied in the field of casting, can solve the problems of unsatisfactory density, strength and toughness of castings, insufficient increase of feeding and solidification pressure, etc.

Inactive Publication Date: 2018-07-20
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing pressure regulating casting technology, the degree of increase in the feeding and solidification pressure is still not enough, resulting in the densification, strength and toughness of the castings still not reaching a satisfactory level

Method used

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  • Low-pressure mold-filling and high-pressure solidification casting device used for pressure adjusting and pressurizing casting machine and casting method
  • Low-pressure mold-filling and high-pressure solidification casting device used for pressure adjusting and pressurizing casting machine and casting method
  • Low-pressure mold-filling and high-pressure solidification casting device used for pressure adjusting and pressurizing casting machine and casting method

Examples

Experimental program
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Effect test

Embodiment 1

[0105] The low-pressure filling and high-pressure solidification casting device of the present invention is installed on the APC3000 pressure regulating and supercharging casting machine, and the pressure regulating and supercharging casting is performed on the automobile engine motor shell casting, including the following steps:

[0106] (1) Prepare aluminum alloy according to a certain ratio, the specific mass percentages are: Si: 6.8%, Mg: 0.40%, Fe: 0.12%, Mn: 0.1%, Ti: 0.14%, Sr: 0.06%; Cu: 0.08 %, RE: 0.05%, Nb: 0.04%; Cr: 0.005%, Zr: 0.01%, B: 0.005%, Nd: 0.005%, Ni: 0.005%, Zn: 0.005%, and the balance is Al. After the alloy is melted in the melting furnace, Al-5Ti-B refiner and Al-10Sr modifier are added at 760℃ for refining and modification, and self-sinking pollution-free refining agent is added at 730℃ for degassing Refining for 40 minutes, slag removal after standing for 30 minutes, take chemical composition samples, after the composition is qualified, transfer the...

Embodiment 2

[0115] The low-pressure filling and high-pressure solidification casting device of the present invention is installed on a CY-3000 type pressure-regulated and pressurized casting machine, and the pressure-regulated and pressurized casting is performed on frame castings such as frames for high-speed rail, including the following steps:

[0116] (1) The aluminum alloy is prepared according to a certain ratio, and the specific mass percentages are: Si: 7.5%, Mg: 0.65%, Fe: 0.20%, Mn: 0.1%, Ti: 0.15%, Sr: 0.05%; Cu: 0.20 %, RE: 0.30%, Nb: 0.05%; Cr: 0.005%, Zr: 0.01%, B: 0.005%, Nd: 0.002%, Ni: 0.001%, Zn: 0.001%, and the balance is Al. After the alloy is melted in the melting furnace, Al-5Ti-B refiner and Al-10Sr modifier are added at 750°C for refining and modification, and self-sinking pollution-free refining agent is added at 730°C for degassing Refining for 30min, after standing for 20min, the slag was removed, and the chemical composition sample was taken. After the composit...

Embodiment 3

[0125] The low-pressure filling and high-pressure solidification casting device of the present invention is installed on the APC4000A pressure-regulated and pressurized casting machine, and the pressure-regulated and pressurized casting is performed on the aero-engine barrel-shaped casing casting, including the following steps:

[0126] (1) The aluminum alloy is prepared according to a certain ratio, and the specific mass percentages are: Si: 7.3%, Mg: 0.65%, Fe: 0.20%, Mn: 0.05%, Ti: 0.12%, Sr: 0.01%; Cu: 0.01 %, RE: 0.008%, Nb: 0.01%; Cr: 0.001%, Zr: 0.01, B: 0.005%, Nd: 0.005%, Ni: 0.005%, Zn: 0.005%, and the balance is Al. After the alloy is melted in the melting furnace, Al-5Ti-B refiner and Al-10Sr modifier are added at 760℃ for refining and modification, and self-sinking pollution-free refining agent is added at 740℃ for degassing Refining for 20 minutes, slag removal after standing for 20 minutes, take chemical composition samples, after the composition is qualified, t...

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Abstract

The invention discloses a low-pressure controllable mold-filling and high-pressure solidification forming casting device capable of being used for a pressure adjusting casting machine and a pressure adjusting and pressurizing casting machine and a casting method. The low-pressure controllable mold-filling and high-pressure solidification forming casting device comprises a casting mold, a metal melt liquid-rising channel and a sprue spreader capable of moving up and down. The sprue spreader plays the roles of flow dividing guiding and compacting a filter net on metal melt at a liquid-rising stage, so that the metal melt is subjected to stable mold-filling in a laminar flow mode. After mold-filling is completed, the sprue spreader downwards moves to form a sealing structure, and metal melt inlets of a sprue bush and a mold cavity are sealed. Then a metal liquid is subjected to high pressurizing to be solidified under high pressure, so that the defects such as shrinkage cavity and porosity, and inclusions and slag inclusion are avoided. Meanwhile, the shape of the sprue spreader is subjected to optimal design, so that low-pressure controllable stable mold-filling and high-pressure solidification forming of the metal melt are ensured. The low-pressure controllable mold-filling and high-pressure solidification forming casting device capable of being used for the pressure adjusting casting machine and the pressure adjusting and pressurizing casting machine and the casting method can be used for casting of shell types, frame types and barrel types of casting pieces, and compared with traditional pressure adjusting casting, the strength can be improved by 10-40%, and the elongation rate can be increased by 30-80%.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a casting device and a casting method that can be used for low-pressure controllable mold filling and high-pressure solidification molding for a pressure-regulated casting machine and a pressure-regulated and pressurized casting machine. Background technique [0002] Lightweight is one of the most important ways to reduce fuel consumption, reduce consumption and increase range. The replacement of traditional steel materials with lightweight materials such as aluminum alloys and magnesium alloys has become the design and replacement of key components in aerospace, high-speed rail, automobiles and other fields. inevitable choice. The overall precision casting of large and thin-walled complex key components has become the development trend of lightweight material structural parts manufacturing technology. The pressure regulating casting technology has the advantages of small margin ...

Claims

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Application Information

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IPC IPC(8): B22D18/02B22D18/04C22C21/02C22C1/03C22F1/043
CPCB22D18/02B22D18/04C22C1/026C22C1/03C22C21/02C22F1/043
Inventor 张花蕊张虎
Owner BEIHANG UNIV
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