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Method for improving flushing resistance of mold

A technology of anti-scour and mold, applied in the field of improving the anti-scour performance of mold, can solve problems such as mold melting loss, and achieve the effect of reducing melting loss, high hardness and wear resistance, and high melting point

Inactive Publication Date: 2011-10-19
SHANGHAI CENSI AUTOMOBILE PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Casting molds, especially aluminum alloy casting molds, when the aluminum liquid at 680°C passes through the thin gate (usually 1.5-4mm thick and 1.5-3mm long) under high temperature and high speed, the surface of the mold and the aluminum liquid produce With severe friction, a part of the kinetic energy is converted into heat energy, which makes the molten aluminum heat up again by about 20-50°C, and the molten aluminum slides on the surface of the mold under high pressure (50-100MPa), which causes the mold to melt due to friction

Method used

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Examples

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Effect test

Embodiment 1

[0011] A method for improving the erosion resistance of a mold, the method is to coat tungsten carbide on the surface of the mold to reduce the melting loss caused by liquid aluminum alloy.

[0012] The tungsten carbide utilizes charging capacitance, with 10 -3 ~10 -1 second period, 10 -6 ~10 -5 Discharge in seconds to coat the mould, and the temperature of the contact part between the mold and the discharged electrode material is 20000°C. The thickness of the tungsten carbide coating is 70 μm.

Embodiment 2

[0014] A method for improving the erosion resistance of a mold, the method is to coat tungsten carbide on the surface of the mold to reduce the melting loss caused by liquid aluminum alloy.

[0015] The tungsten carbide utilizes charging capacitance, with 10 -3 ~10 -1 second period, 10 -6 ~10 -5 Discharge in seconds to coat the mould, and the temperature of the contact part between the mold and the discharged electrode material is 8000°C. The thickness of the tungsten carbide coating is 50 μm.

Embodiment 3

[0017] A method for improving the erosion resistance of a mold, the method is to coat tungsten carbide on the surface of the mold to reduce the melting loss caused by liquid aluminum alloy.

[0018] The tungsten carbide utilizes charging capacitance, with 10 -3 ~10 -1 second period, 10 -6 ~10 -5 Discharge in seconds to coat the mould, and the temperature of the contact part between the mold and the discharged electrode material is 25000°C. The thickness of the tungsten carbide coating is 200 μm.

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PUM

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Abstract

The invention relates to a method for improving flushing resistance of a mold. The method comprises the following step of coating tungsten carbide on the surface of the mold to reduce melting-loss caused by liquid aluminum alloy. Compared with the prior art, the mold processed with the method provided by the invention has the advantages of simplicity, good effect, good flushing resistance and the like.

Description

technical field [0001] The invention relates to a mold, in particular to a method for improving the erosion resistance of the mold. Background technique [0002] Casting molds, especially aluminum alloy casting molds, when the aluminum liquid at 680°C passes through the thin gate (usually 1.5-4mm thick and 1.5-3mm long) under high temperature and high speed, the surface of the mold and the aluminum liquid produce With severe friction, part of the kinetic energy is converted into heat energy, which makes the molten aluminum heat up again by about 20-50°C, and the molten aluminum slides on the surface of the mold under high pressure (50-100MPa), which causes the mold to melt due to friction. Contents of the invention [0003] The purpose of the present invention is to provide a simple and effective method for improving the erosion resistance of molds in order to overcome the above-mentioned defects in the prior art. [0004] The purpose of the present invention can be achie...

Claims

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Application Information

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IPC IPC(8): B23H9/00B23H1/00
Inventor 仲田新一
Owner SHANGHAI CENSI AUTOMOBILE PARTS
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