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Nano composite ceramic coating, pressure casting die and preparation method of pressure casting die

A nano-composite and ceramic coating technology, which is applied in coatings, casting molding equipment, metal material coating technology, etc., can solve problems such as corrosion failure life, fragmentation failure, thermal fatigue failure, etc.

Active Publication Date: 2017-07-07
吉林省力科科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of thermal fatigue failure, crack failure, corrosion failure and low service life of existing die-casting molds, a nanocomposite ceramic coating, die-casting mold and its preparation method are provided

Method used

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  • Nano composite ceramic coating, pressure casting die and preparation method of pressure casting die
  • Nano composite ceramic coating, pressure casting die and preparation method of pressure casting die

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preparation example Construction

[0036] The present invention also provides a method for preparing a die-casting mold, comprising:

[0037] Step 1: Pretreating the die-casting mold base 1;

[0038] Step 2: Deposit a Cr metal bonding layer 2-1 on the surface of the pretreated die-casting mold substrate 1 obtained in Step 1;

[0039] Step 3: Depositing a CrN transition layer 2-2 on the surface of the Cr metal bonding layer 2-1 obtained in step 2;

[0040] Step 4: Deposit a supporting layer 2-3 on the surface of the CrN transition layer 2-2 obtained in Step 3;

[0041] Step 5: Deposit the functional layer 2-4 on the surface of the supporting layer 2-3 obtained in the step 4 to obtain a die-casting mold with a nanocomposite ceramic coating deposited on the surface of the substrate.

[0042]According to the present invention, pretreatment of the die-casting mold base can be carried out by methods well known in the art, and there is no special limitation. In the present invention, the working surface of the die-c...

Embodiment 1

[0051] The working surface of the die-casting mold base made of H13 (4Cr5MoSiV1) material is polished, and the mold base is degreased, dewaxed, cleaned and dried by ultrasonic cleaning;

[0052] Place the cleaned and dried mold base in the cavity of the vacuum cathode ion plating equipment, heat to 400°C, and vacuumize to 5×10 -3 Pa, feed Ar, keep the air pressure at 1.2Pa, turn on the ion source of the anode layer, the voltage is 550V, the current is 3A, the speed of the substrate holder is 1rpm, the negative bias is -900V, and the bombardment time is 60min;

[0053] After glow cleaning, adjust the vacuum to 0.8Pa, turn on the metal Cr target, keep the bias at -300V, current 75A, and deposit for 10min to obtain a Cr metal bonding layer with a thickness of 120nm;

[0054] After the deposition of the Cr binding layer on the metal surface is completed, the bias voltage is reduced to -150V, and the N 2 , control the air pressure at 0.85Pa, the substrate temperature at 400°C, the...

Embodiment 2

[0059] The working surface of the die-casting mold made of Y10 (4Cr5Mo2MnVSi) material is polished, and the mold substrate is degreased, dewaxed, cleaned and dried by ultrasonic cleaning;

[0060] Place the cleaned and dried mold base in the cavity of the vacuum cathode ion plating equipment, heat to 450 degrees, and vacuumize to 5×10 -3 Pa, feed Ar, keep the air pressure at 1.2Pa, turn on the ion source of the anode layer, the voltage is 500V, the current is 4A, the speed of the substrate holder is 2rpm, the negative bias is -900V, and the bombardment time is 80min;

[0061] After glow cleaning, the vacuum was adjusted to 0.9Pa, the metal Cr target was turned on, the bias voltage was maintained at -300V, the current was 80A, and the deposition was carried out for 8min to obtain a Cr metal interface bonding layer with a thickness of 140nm.

[0062] After the deposition of the Cr binding layer on the metal surface is completed, the bias voltage is reduced to -150V, and the N 2...

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Abstract

The invention provides a nano composite ceramic coating, a pressure casting die and a preparation method of the pressure casting die and belongs to the technical field of preparation of coatings and pressure casting dies. The problems that existing pressure casting dies are poor in property and short in service life are solved. The nano composite ceramic coating comprises a Cr metal bonding layer, a CrN transition layer arranged on the Cr bonding layer, a supporting layer arranged on the CrN transition layer and a function layer arranged on the supporting layer. The supporting layer is a nano periodical TiSiN-CrAlN structural coating of a gradient structure, and the function layer is a nano composite TiCrAlSiN structural coating. The invention further provides the pressure casting die prepared with the composite ceramic coating and further provides the preparation method of the pressure casting die. The nano composite ceramic coating has the bonding force exceeding 70 N, the internal stress being smaller than 0.15 Gpa and the hardness being higher than 35 GPa, and the service life of the pressure casting die is three times or above longer than that of common pressure casting dies.

Description

technical field [0001] The invention belongs to the technical field of preparation of coatings and die-casting molds, and in particular relates to a nanocomposite ceramic coating, a die-casting mold and a preparation method thereof. Background technique [0002] With the rapid development of China's automobile industry, the foundry industry has ushered in a new period of development, and at the same time put forward higher requirements for the mechanical properties of die-casting molds. Among all kinds of molds, die-casting molds have the highest requirements and the harshest working environment. Due to long-term contact with high-temperature molten metal, die-casting molds often cause early failure before the end of the mold life in actual production. [0003] In order to avoid the failure of the die-casting mold, the surface of the mold is required to have high hardness, heat corrosion resistance, anti-bonding, impact resistance and other properties. Due to the long mold...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/00B22C3/00
CPCB22C3/00C23C28/322C23C28/34C23C28/36
Inventor 李明南夏原高方圆李光
Owner 吉林省力科科技有限公司
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