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Plastic metal-ceramic laminated coating die-casting mould and preparation method thereof

A technology for cermets and die-casting molds, which is applied in the coating process of metal materials, coatings, and plating of superimposed layers. It can solve problems such as unsatisfactory corrosion resistance, mold fatigue cracks, and unsatisfactory deformation resistance. The effect of improved mold life, improved service life, and excellent deformation resistance

Active Publication Date: 2018-06-05
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a plastic cermet laminated coating die-casting mold and its preparation method, which can solve the problems of unsatisfactory corrosion resistance and deformation resistance in existing molds and frequent cold and cold conditions in die-casting production. Technical Problems of Fatigue Cracks on the Surface of Thermal Cycle Die Casting Mold

Method used

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  • Plastic metal-ceramic laminated coating die-casting mould and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] see figure 1 , a plastic metal-ceramic laminated coating die-casting mold, which is composed of a mold base 1 and a surface adhesion layer 2; the surface adhesion layer 2 is composed of a high-plasticity metal layer 21 and a heat-resistant ceramic layer 22; wherein, the high-plasticity metal layer The thickness of 21 is set to satisfy that the mold base does not undergo accumulative plastic deformation during its heating and cooling process, and the thickness is 50um; the material selection of the heat-resistant ceramic layer 22 ensures that it will not crack under force during its heating and cooling process, and its thickness is 10um .

[0029] The highly plastic metal layer 21 is a coating mainly composed of tantalum simple substance. The metallurgical bond between the high-plasticity metal layer 21 and the surface of the mold base 1 is formed, and the yield strength of the high-plasticity metal layer 21 is greater than the yield strength at which accumulative plast...

Embodiment 2

[0038] A plastic metal-ceramic laminated coating die-casting mold, including a mold base 1 and a surface attachment layer 2, the surface attachment 2 is composed of a high-plasticity metal layer 21 and a heat-resistant ceramic layer 22; wherein, the thickness of the high-plasticity metal layer 21 The thickness is 80um if the mold base does not undergo accumulative plastic deformation during the heating and cooling process; the material of the heat-resistant ceramic layer 22 is selected to ensure that it will not crack under force during the heating and cooling process, and the thickness is 15um.

[0039] The high-plasticity metal layer 21 is a coating mainly composed of tantalum simple substance. The metallurgical bond between the high-plasticity metal layer 21 and the surface of the mold base 1 is formed, and the yield strength of the high-plasticity metal layer 21 is greater than the yield strength at which accumulative plastic deformation just occurs. The heat-resistant cer...

Embodiment 3

[0048] A plastic metal-ceramic laminated coating die-casting mold, comprising a mold base 1 and a surface adhesion layer 2; the surface adhesion layer 2 is composed of a high-plasticity metal layer 21 and a heat-resistant ceramic layer 22; wherein, the high-plasticity metal layer 21 The thickness is set to ensure that the mold base does not undergo accumulative plastic deformation during the heating and cooling process, and the thickness is 50um; the material of the heat-resistant ceramic layer 22 is selected to ensure that it will not crack under force during the heating and cooling process, and the thickness is 10um.

[0049] The highly plastic metal layer 21 is a coating mainly composed of tantalum and nickel, 40% of which is nickel, and the balance is tantalum. The metallurgical bond between the high-plasticity metal layer 21 and the surface of the mold base 1 is formed, and the yield strength of the high-plasticity metal layer 21 is greater than the yield strength at which...

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Abstract

The invention discloses a plastic metal-ceramic laminated coating die-casting mould. The plastic metal-ceramic laminated coating die-casting mould comprises a mould base and a surface adhesion layer arranged above the mould base, wherein the surface adhesion layer is composed of, sequentially from bottom to top, a high-plasticity metal layer and a heat-resistant ceramic layer; the thickness of thehigh-plasticity metal layer is 1-500 mu m, and the thickness of the heat-resistant ceramic layer is 1-50 mu m. According to the plastic metal-ceramic laminated coating die-casting mould, the surfacehigh-plasticity metal layer is obtained through laser cladding, plasma surface metallurgy or electron beam surface alloying, so that the high-plasticity metal layer and the mould base can be bonded ina metallurgical mode to effectively prolong the service life of the plastic metal-ceramic laminated coating die-casting mould; the heat-resistant ceramic layer is prepared through the method of plasma spraying, chemical vapor deposition or physical vapor deposition; by means of the obtained surface high-plasticity metal layer and the obtained heat-resistant ceramic layer, the plastic metal-ceramic laminated coating die-casting mould is excellent in anti-deformation property, heat resistance, fatigue resistance, corrosion resistance and wearing resistance.

Description

technical field [0001] The invention belongs to the technical field of ceramic laminate coating die-casting mold and its manufacture, and in particular relates to a plastic cermet laminate coating die-casting mold and a preparation method thereof. Background technique [0002] The high hardness of the high-hardness multilayer film has a variety of material combinations and selectivity in its performance, which demonstrates the broad application prospects of this type of film in the field of surface strengthening and surface modification of die-casting molds. [0003] Die casting is a precision casting method that uses high pressure to force molten metal into a metal mold with a complex shape, and solidifies under pressure to form a casting. During the casting process, the mold needs to bear a large impact force, the service conditions are very harsh, and it has to undergo frequent cold and heat cycles in the die-casting production, and fatigue cracks are easily generated on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D17/22C23C28/00
CPCB22D17/2209C23C28/32C23C28/322C23C28/34
Inventor 杨冠军宋忠孝朱晓东李雁淮钱旦孔文
Owner XI AN JIAOTONG UNIV
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