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Component for aluminum die-casting die

An aluminum die-casting and mold technology, applied in the direction of casting molds, casting mold components, manufacturing tools, etc., can solve the problems of poor dimensional accuracy, reduced wear resistance, unable to maintain long-term inhibition of aluminum alloys and substrates, etc., to achieve excellent The effect of sintering resistance

Inactive Publication Date: 2020-01-17
AISIN SEIKI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the wear resistance is reduced in this way, for example, when the product is released from the mold in the die casting process, the sliding layer is scraped off by the eutectic Si contained in the aluminum alloy and disappears. The effect of substrate reaction
In addition, when the content of silicon in the amorphous carbon film is 10 at % or more, sintering occurs due to the reaction of aluminum and silicon in the die casting process, which may cause problems such as deterioration of the dimensional accuracy of the die cast product as described above.

Method used

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  • Component for aluminum die-casting die
  • Component for aluminum die-casting die
  • Component for aluminum die-casting die

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach 》

[0021] Hereinafter, a member for an aluminum die-casting die (hereinafter, may be referred to as a “first member”) according to a first embodiment of the present invention will be described with reference to the drawings.

[0022]

[0023] The first member has an exposed surface that is a surface exposed in the cavity of the aluminum die-casting mold. In addition, "aluminum die casting" in this specification includes not only the die casting method of aluminum but also the die casting method of aluminum alloy. In addition, the first member is not particularly limited as long as it has an exposed surface that is a surface exposed in the cavity of the aluminum die-casting mold. Specific examples of such members include, for example, members constituting a cavity or a core of an aluminum die-casting mold, and members such as casting pins.

[0024] The material of the base material constituting the first member can be appropriately selected from various materials generally used...

no. 2 approach 》

[0035] Hereinafter, the member for aluminum die-casting molds (it may be called a "2nd member" hereafter) which concerns on 2nd Embodiment of this invention is demonstrated.

[0036]

[0037]As described above, according to the first member, since the diamond-like carbon (DLC) film formed on at least a part of the exposed surface contains hydrogen at a predetermined content rate, the film can have both good toughness and wear resistance, and maintain Resistance to sintering relative to molten metals containing aluminum. However, depending on the conditions of the die casting process (for example, the temperature of molten metal, etc.), oxidation (combustion) of carbon and hydrogen constituting the DLC film may occur. As a result, the heat resistance (oxidation resistance) of the coating becomes insufficient, and it may be difficult to maintain the seizing resistance to molten metal containing aluminum for a long period of time.

[0038] Therefore, the second member is a mem...

Embodiment

[0046] "Preparation of various samples"

[0047] Hereinafter, parts for aluminum die-casting molds according to embodiments of the present invention will be described in detail with reference to the drawings. A test piece and a cast pin made of alloy tool steel SKD61 for molds were prepared, and the coatings listed in Table 1 below were formed on the respective surfaces. For any sample, the same as figure 1 In each case shown, each coating was formed so that the thickness (d) of the coating became about 3 μm. should be explained, figure 1 It is a schematic cross-sectional view of the surface (exposed surface) on which the coating is formed in each sample (1) near the coating, and depicts the coating (2) and a part of the substrate (3) of the sample (1).

[0048] [Table 1]

[0049]

[0050] As shown in Table 1, for sample CE1 of the comparative example, a nitride film was formed on the surface of the test piece and the casting pin by the salt bath nitriding method (the s...

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Abstract

To provide a component for an aluminum die-casting die having excellent seizure resistance to an aluminum-containing molten metal.SOLUTION: There is provided a component for an aluminum die-casting die having an exposed face as a surface exposed to the cavity part of an aluminum die-casting die and in which a diamond-like carbon film is formed on at least a part of the exposed face, in which the diamond-like carbon film includes hydrogen at a content of 10 to 30 at%. The diamond-like carbon film may include silicon at a content below 10 at% as well. Preferably, the content of the silicon in the diamond-like carbon film is 0.5 to 7 at%.

Description

technical field [0001] The present invention relates to parts for aluminum die-casting molds. More specifically, the present invention relates to a component for an aluminum die-casting die having excellent seizing resistance against molten metal containing aluminum. Background technique [0002] Sintering in the die-casting method is a phenomenon in which the injected aluminum alloy reacts and welds with the surface of a mold or a casting pin, for example, and may cause problems such as deterioration of dimensional accuracy, productivity, and appearance quality of die-casting castings. Therefore, in this technical field, for the purpose of reducing the reaction and welding of aluminum alloys, countermeasures for sintering such as cooling and strengthening the inside and / or surface of the mold, coating of a release agent, and surface treatment have been widely carried out. [0003] As a specific example of the above-mentioned surface treatment, for example, by methods such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D17/22B22C3/00B22C9/06C01B32/00
CPCB22C3/00B22C9/06B22D17/2218B22D17/22C01B32/00
Inventor 金成姬太刀川英男萩野达也铃木奉努
Owner AISIN SEIKI KK
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