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Low-pressure mold filling and high-pressure solidifying casting device and casing method for low-pressure supercharged casting machine

A low-pressure casting machine and casting machine technology, which are used in high-pressure solidification forming casting devices and low-pressure controllable filling fields, can solve the problem of insufficient liquid metal feeding, unsatisfactory casting density, strength and toughness, etc. question

Inactive Publication Date: 2018-05-29
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the feeding degree of molten metal under this pressure is still not enough, resulting in unsatisfactory density, strength and toughness of castings.

Method used

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  • Low-pressure mold filling and high-pressure solidifying casting device and casing method for low-pressure supercharged casting machine
  • Low-pressure mold filling and high-pressure solidifying casting device and casing method for low-pressure supercharged casting machine
  • Low-pressure mold filling and high-pressure solidifying casting device and casing method for low-pressure supercharged casting machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110] Install the low-pressure filling mold high-pressure solidification casting device of the present invention on the BH-1 type low-pressure pressurized casting machine, and carry out low-pressure pressurized casting to the high-speed rail engine motor casing casting, including the following steps:

[0111] (1) Prepare aluminum alloy according to a certain ratio, the specific mass percentage is: Si: 7.2%, Mg: 0.65%, Fe: 0.20%, Mn: 0.1%, Ti: 0.13%, Sr: 0.02%; Cu: 0.03 %, RE: 0.005%, Nb: 0.05%, Cr: 0.008%, Zr: 0.012%, B: 0.009%, Nd: 0.005%, Ni: 0.008%, Zn: 0.008%, and the balance is Al. After the alloy is melted in the melting furnace, add Al-5Ti-B refiner and Al-10Sr modifier at 760°C for refinement and modification, and add self-sinking pollution-free refining agent for degassing at 740°C Refining for 30 minutes, standing still for 30 minutes, removing slag, taking chemical composition samples, and transferring the melted aluminum alloy liquid from the pneumatic ladle to th...

Embodiment 2

[0120]The low-pressure filling and high-pressure solidification casting device of the present invention is installed on the BH-1 type low-pressure pressurized casting machine, and the low-pressure pressurized casting is carried out to the automobile auxiliary frame casting, comprising the following steps:

[0121] (1) Prepare aluminum alloy according to a certain ratio, the specific mass percentage is: Si: 6.8%, Mg: 0.35%, Fe: 0.20%, Mn: 0.1%, Ti: 0.15%, Sr: 0.03%; Cu: 0.10 %, RE: 0.15%, Nb: 0.05%, Cr: 0.005%, Zr: 0.01%, B: 0.008%, Nd: 0.008%, Ni: 0.005%, Zn: 0.005%, and the balance is Al. After the alloy is melted in the melting furnace, add Al-5Ti-B refiner and Al-10Sr modifier at 760°C for refinement and modification, and add self-sinking pollution-free refining agent for degassing at 720°C Refining for 40 minutes, standing still for 20 minutes, removing slag, taking chemical composition samples, and transferring the melted aluminum alloy liquid from the pneumatic ladle to ...

Embodiment 3

[0130] The low-pressure filling and high-pressure solidification casting device of the present invention is installed on a BH-1 type low-pressure pressurized casting machine, and the barrel-shaped motor casing casting is carried out to low-pressure pressurized casting, including the following steps:

[0131] (1) Prepare aluminum alloy according to a certain ratio, the specific mass percentage is: Si: 7.2%, Mg: 0.55%, Fe: 0.18%, Mn: 0.05%, Ti: 0.12%, Sr: 0.015%; Cu: 0.01 %, RE: 0.002%, Nb: 0.01%, 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, add Al-5Ti-B refiner and Al-10Sr modifier at 755°C for refinement and modification, and add self-sinking pollution-free refining agent for degassing at 740°C Refining for 20 minutes, standing still for 30 minutes, removing slag, taking chemical composition samples, and transferring the melted aluminum alloy liquid from the pneumatic ladle to the...

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Abstract

The invention discloses a low-pressure controllable mold filling and high-pressure solidifying molding casting device and casting method for a low pressure and low-pressure supercharged casting machine. The device comprises a casting mold, a metal melt ascending feed channel and a flow dividing cone capable of moving up and down; the flow dividing cone can plays a role in flow dividing guidance and filter net compaction on the metal melt in the ascending feed stage, the metal melt is stably subject to mold filling in a laminar flow manner, after mold filling is finished, the flow dividing conedescends to form a seal structure, a sprue bush and a metal melt inlet of a m old cavity are closed. The metal liquid is subject to high supercharging, and is solidified under the high pressure, defects of shrinkage porosity, slag inclusion and the like can be overcome, the shape of the flow dividing cone is optimized, and metal melt low-pressure controllable stable mold filling and high-pressuresolidifying molding are ensured. The device and method can be used for casting of shell, frame, and bucket castings, and compared with traditional low-pressure casting, the strength can be improved by 10 to 50%, and the extension rate can be improved by 30 to 90%.

Description

technical field [0001] The invention relates to the field of casting technology, in particular to a casting device and casting method that can be used for low-pressure controllable mold filling and high-pressure solidification molding of a low-pressure pressurized casting machine. Background technique [0002] Lightweight is one of the most important ways to save fuel, reduce emissions, reduce consumption and increase range. Replacing traditional steel materials with lightweight materials such as aluminum alloys and magnesium alloys has become a design update for key components in the fields of aerospace, high-speed rail, and automobiles. inevitable choice. The overall precision casting of large thin-walled complex key components has become the development trend of lightweight material structural parts manufacturing technology. The advantages of high efficiency and wide application range have attracted more and more attention from the foundry industry. [0003] The basic p...

Claims

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Application Information

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IPC IPC(8): B22D18/04C22C21/02
CPCB22D18/04C22C21/02
Inventor 张花蕊张虎
Owner BEIHANG UNIV
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