Pressure casting aluminum mold with nanocrystalline composite coating and preparing method

A nanocrystalline composite, cast aluminum mold technology, applied in coating, metal material coating process, ion implantation plating, etc., can solve the problems of difficult to process the inner wall of small holes, difficult to apply complex molds, and inability to handle complex surfaces. , to achieve the effect of improving the ability of anti-aluminum water erosion, good industrial application prospects and easy control

Pending Publication Date: 2019-10-25
IKD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, laser cladding cannot deal with complex surfaces, and there are insurmountable difficulties in processing the inner walls of small holes, making it difficult to apply to complex molds

Method used

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  • Pressure casting aluminum mold with nanocrystalline composite coating and preparing method
  • Pressure casting aluminum mold with nanocrystalline composite coating and preparing method
  • Pressure casting aluminum mold with nanocrystalline composite coating and preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: 1) At 450, ℃ in argon and hydrogen environment, the die-casting aluminum mold is subjected to plasma etching; 2) Then under the condition of 0.02Pa, -800V, Cr is evaporated from the Cr target at high temperature and heated at high bias Under pressure, make it move to the surface of the mold at high speed, so as to deposit a 1 nanometer thick transition metal Cr binding layer on the surface of the mold;

[0035] 3) Under the conditions of 0.5Pa and -50V, feed nitrogen to react with Cr, and deposit a 50 nm thick CrN transition layer on the surface of the mold;

[0036] 4) Under the conditions of 2Pa and -100V, release AlCrSi on the AlCrSi target to react with the CrN transition layer, and deposit a 40nm CrN / AlCrSiN support layer on the surface of the mold;

[0037] 5) Under the conditions of 3Pa and -100V, control the on-off of oxygen and nitrogen to deposit and generate a 100 nanometer thick AlCrSiN / AlCrSiON hardening layer on the surface of the mold;

[0038...

Embodiment 2

[0040] Example 2: 1) After plasma etching the die-casting aluminum mold at 550°C in an argon and hydrogen environment, 2) under the conditions of 0.4Pa and -1000V, Cr was evaporated from the Cr target at high temperature and heated at high temperature. Under the action of bias voltage, make it move to the surface of the mold at high speed, so as to deposit a 40 nanometer thick transition metal Cr binding layer on the surface of the mold;

[0041] 3) Under the conditions of 2Pa and -300V, feed nitrogen to react with Cr, and deposit a 2000 nanometer thick CrN transition layer on the surface of the mold;

[0042] 4) Under the conditions of 2.5Pa and -250V, release AlCrSi on the AlCrSi target to react with the CrN transition layer to deposit a 2000 nm thick CrN / AlCrSiN support layer on the mold surface;

[0043] 5) Under the conditions of 3Pa and -300V, control the on-off of oxygen and nitrogen to deposit and generate a 2400 nanometer thick AlCrSiN / AlCrSiON hardening layer on the ...

Embodiment 3

[0046] Example 3: 1) After plasma etching the die-casting aluminum mold at 500°C in an argon and hydrogen environment, 2) under the conditions of 0.2Pa and -800V, evaporate Cr from the Cr target at a high temperature and Under the action of bias voltage, make it move to the surface of the mold at high speed, so as to deposit a 20 nanometer thick transition metal Cr binding layer on the surface of the mold;

[0047] 3) Under the conditions of 1Pa and -100V, feed nitrogen to react with Cr, and deposit a CrN transition layer with a thickness of 1000 nanometers on the surface of the mold;

[0048] 4) Under the conditions of 3Pa and -150V, release AlCrSi on the AlCrSi target to react with the CrN transition layer to deposit a 1000 nm thick CrN / AlCrSiN support layer on the surface of the mold;

[0049] 5) Under the conditions of 4Pa and -200V, control the on-off of oxygen and nitrogen to deposit a 1000 nanometer thick AlCrSiN / AlCrSiON hardening layer on the surface of the mold;

[...

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Abstract

The invention discloses a pressure casting aluminum mold with a nanocrystalline composite coating and a preparing method. A mold body and a coating on the mold surface are included; the coating comprises a binding layer, a transition layer, a supporting layer, a hardness increasing layer and a temperature-resisting corrosion-resisting layer which are distributed from inside to outside and have hardness gradient, the binding layer is a pure Cr layer, the transition layer is a CrN layer, the supporting layer is a CrN and AlCrSiN composite coating, the hardness increasing layer is an AlCrSiN andAlCrSiON alternative layer, and the temperature-resisting corrosion-resisting layer is an AlCrSiON and AlCrSiO alternative layer. The coating is a combination of multiple kinds of nanocrystalline complex nitride and oxide coating materials, the component has the gradual change characteristic, inner stress of the coating is reduced, coating toughness is improved, the defect that an existing pressure casting aluminum mold is insufficient in wear resistance, temperature resistance and corrosion resistance can be well overcome, the service life of the pressure casting aluminum mold can be greatlyprolonged, and adaptation of the pressure casting aluminum alloy can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of mold film coatings, in particular to a nanocrystalline composite coating and a method for preparing a die-casting aluminum mold with the nanocrystalline composite coating. Background technique [0002] Die-casting mold is an important tool for casting metal parts. my country is a veritable die-casting country. The basic process of die-casting is that molten metal is cast and filled into the cavity of the mold at low or high speed. The mold has a movable cavity surface, which is forged under pressure during the cooling process of the molten metal, which can eliminate the shrinkage cavity and porosity of the blank. Defects also make the internal structure of the blank reach the broken grains of the forged state. [0003] During die-casting production, the mold is repeatedly subjected to the effects of cold and heat, the forming surface and its interior are deformed, and they are involved with each other to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/24C23C14/02C23C14/06C23C14/08C23C14/16
CPCC23C14/0021C23C14/022C23C14/0641C23C14/0676C23C14/08C23C14/16C23C14/24
Inventor 李建军范鹏方天明
Owner IKD CO LTD
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