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Die-casting mold material and processing method for outer casing of auto parts

A technology for auto parts and die-casting molds, applied in the field of die-casting production, can solve the problems of poor thermal conductivity and thermal fatigue resistance, prone to early fracture, poor thermal strength, etc., and achieves good processability and dimensional stability. Strong, hardenability effect

Active Publication Date: 2018-06-08
YANGZHOU KAIXIANG ELECTRIC MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main domestic die-casting mold materials are 4Cr5MoSiV1, 3Cr2W8V, etc. The most commonly used 4Cr5MoSiV1 steel has high strength, tempering stability, good toughness and thermal fatigue resistance, but the heat strength above 600 ° C is not good. Not suitable for die-casting high-melting point alloys, and steel has poor thermal conductivity and thermal fatigue resistance, low plasticity and toughness, and is prone to early fracture

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A die-casting mold material for an outer casing of an auto part, the mold is made of magnesium-aluminum alloy, and the magnesium-aluminum alloy includes the following components by mass ratio: 1.5% iron, 8.1% magnesium, 0.25% silver, 0.06% tungsten, and 0.08% chromium , 0.07% tin, 1.2% zinc, 0.08% silicon carbide, 0.05% graphite, and the balance is aluminum.

[0022] The processing method of the die-casting mold material for the outer shell of a kind of auto parts comprises the following steps:

[0023] 1) Put the magnesium-aluminum alloy raw material in a furnace, and heat it to 690°C under the protection of an inert gas to liquefy the alloy raw material to form molten metal; stir and vibrate the molten metal at a speed of 1300rpm, and discharge the gas in the molten metal;

[0024] 2) Mold clamping: put the molten metal into the mold until the mold parting surface gap is 20-30mm, then stop mold clamping;

[0025] 3) Inject oxygen into the gap like step 2), continue m...

Embodiment 2

[0029] A die-casting mold material for an outer shell of an automobile part, the mold is made of magnesium-aluminum alloy, and the magnesium-aluminum alloy includes the following components by mass ratio: iron 1.5% to 3.5%, magnesium 8.1% to 10.5%, and silver 0.25% to 0.85% %, 0.06% to 0.18% of tungsten, 0.08% to 0.18% of chromium, 0.07% to 0.56% of tin, 1.2% to 3.8% of zinc, 0.08% to 1.76% of silicon carbide, 0.05% to 0.15% of graphite, and the balance is aluminum.

[0030] The processing method of the die-casting mold material for the outer shell of a kind of auto parts comprises the following steps:

[0031] 1) Put the magnesium-aluminum alloy raw material in a furnace, and heat it to 690°C under the protection of an inert gas to liquefy the alloy raw material to form molten metal; stir and vibrate the molten metal at a speed of 1300rpm, and discharge the gas in the molten metal;

[0032] 2) Mold clamping: put the molten metal into the mold until the mold parting surface ga...

Embodiment 3

[0037] A die-casting mold material for an outer casing of an auto part, the mold is made of magnesium-aluminum alloy, and the magnesium-aluminum alloy includes the following components by mass ratio: 2% iron, 9.3% magnesium, 0.56% silver, 0.12% tungsten, and 0.12% chromium , 0.35% tin, 2.1% zinc, 1.26% silicon carbide, 0.09% graphite, and the balance is aluminum.

[0038] The processing method of the die-casting mold material for the outer shell of a kind of auto parts comprises the following steps:

[0039] 1) Put the magnesium-aluminum alloy raw material in a furnace, and heat it to 690°C under the protection of an inert gas to liquefy the alloy raw material to form molten metal; stir and vibrate the molten metal at a speed of 1300rpm, and discharge the gas in the molten metal;

[0040] 2) Mold clamping: put the molten metal into the mold until the mold parting surface gap is 20-30mm, then stop mold clamping;

[0041] 3) Inject oxygen into the gap like step 2), continue mol...

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Abstract

The invention discloses a vehicle part shell body die-casting mold material and a machining method thereof. A mold is prepared by a magnesium-aluminum alloy; and the magnesium-aluminum alloy comprises the following components in percentage by mass: 1.5-3.5% of iron, 8.1-10.5% of magnesium, 0.25-0.85% of silver, 0.06-0.18% of tungsten, 0.08-0.18% of chromium, 0.07-0.56% of tin, 1.2-3.8% of zinc, 0.08-1.76% of silicon carbide, 0.05-0.15% of graphite, and the balance of aluminum. The material is excellent in strength, toughness and high-temperature thermal fatigue resistance, can bear the temperature fusion, is suitable for long-time work at high temperature, is high in hardenability, high in size stability, excellent in machinability and high in thermal cracking resistance, and is suitable for large high-performance die-casting molds and extrusion molds with the requirements of complex structure, precision and long life.

Description

technical field [0001] The invention belongs to the field of die-casting production, and in particular relates to a die-casting mold material for an outer casing of an automobile part and a processing method thereof. Background technique [0002] Die-casting, referred to as die-casting, is a precision forming technology for metal parts close to the final shape and size, and the final product is die-casting. Its essence is that under the action of high pressure, the liquid metal is filled into the mold cavity at high speed, and is formed and solidified under the action of pressure, so as to obtain die-casting parts with clear outline and smooth surface. In the non-ferrous metal casting industry, die casting is an important casting method. In recent years, light alloys dominated by magnesium and aluminum have occupied an important position in the die-casting industry. Aluminum alloy castings obtained through die-casting account for about 60% of the total lead alloy castings. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/06C22C1/02C22F1/047B22D17/22
CPCB22D17/2209C22C1/026C22C21/06C22F1/047
Inventor 许继忠卢景阳李守军马永强孙忠伟赵东
Owner YANGZHOU KAIXIANG ELECTRIC MFG CO LTD
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