Aluminum-alloy hollow tube extruding die based on PCVD processing

A technology for extruding molds and hollow tubes, applied in the field of ionic surface modification, can solve the problems of increased PCVD hard film defects, increased residual stress, decreased hardness and bonding force, etc., to improve hardness, reduce defects, and prevent fractures or peeling effect

Active Publication Date: 2015-11-25
SHANGYU HONGEN PRECISION MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PCVD hard films are mostly ceramic materials, and their thickness is usually only a few microns, while the substrate is generally metal or alloy. The hardness, elastic modulus and thermal expansion coeff

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Use the following steps to carry out surface treatment on the aluminum alloy hollow tube extrusion die made of hot work die steel H13 material:

[0044] (1) Carry out heat treatment to the extrusion mold: the quenching temperature is 1120°C, the tempering temperature is 550°C (HRC=52~54), and then degreasing, polishing and dehydration are carried out;

[0045] (2) TiN, TiC, TiCN, and TiSiN are coated sequentially by PCVD, and the thicknesses of each coating are 0.5 μm, 5 μm, 1 μm, and 1.5 μm, respectively.

[0046] The extrusion die with the above surface treatment can produce 6 tons of aluminum alloy hollow tubes during its normal service life, and the hardness of the coating film is Hv2900.

Embodiment 2

[0048] Use the following steps to carry out surface treatment on the aluminum alloy hollow tube extrusion die made of hot work die steel H13 material:

[0049] (1) Carry out heat treatment to the extrusion mold: the quenching temperature is 1120°C, the tempering temperature is 550°C (HRC=52~54), and then degreasing, polishing and dehydration are carried out;

[0050] (2) TiC, TiN, TiCN, and TiSiN are coated sequentially by PCVD, and the thicknesses of each layer of coating are 0.5 μm, 5 μm, 1 μm, and 1.5 μm, respectively.

[0051] The extrusion die with the above surface treatment can produce 5.3 tons of aluminum alloy hollow tubes during its normal service life, and the hardness of the coating film is Hv2900.

Embodiment 3

[0053] Use the following steps to carry out surface treatment on the aluminum alloy hollow tube extrusion die made of hot work die steel H13 material:

[0054] (1) Carry out heat treatment to the extrusion mold: the quenching temperature is 1120°C, the tempering temperature is 550°C (HRC=52~54), and then degreasing, polishing and dehydration are carried out;

[0055] (2) TiN and Al are sequentially processed by PCVD 2 o 3 , TiCN, TiSiN coating, the thickness of each layer of coating is 0.5μm, 5μm, 1μm, 1.5μm.

[0056] The extrusion die with the above surface treatment can produce 5.1 tons of aluminum alloy hollow tubes during its normal service life, and the hardness of the coating film is Hv2800.

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Abstract

The invention discloses an aluminum-alloy hollow tube extruding die based on PCVD processing. The aluminum-alloy hollow tube extruding die comprises a base body and 2-5 layers of coatings; the coatings are processed in a PCVD manner, the coatings are arranged at the preset positions of the base body, and the base body is sequentially wrapped by the coatings; and the coatings are independently formed by one of titanium nitrate, titanium carbide, titanium carbonitride, aluminum oxide and silicon nitride. The service life of the aluminum-alloy hollow tube extruding die is once to ten times of that of an aluminum-alloy hollow tube extruding die processed in a traditional surface nitriding manner. Thus, the service life of the aluminum-alloy hollow tube extruding die based on the PCVD processing is greatly prolonged.

Description

technical field [0001] The invention relates to the field of plasma surface modification, in particular to an aluminum alloy hollow tube extrusion die based on PCVD treatment. Background technique [0002] Micro-channel porous tubes, especially aluminum alloy hollow tubes are the main parts of heat exchangers, and are the best products to replace the original copper tubes. They have good heat dissipation effect, low cost and high output, and are widely used in automobile air conditioners and household air conditioners. , central air conditioning, refrigerator heat exchanger, etc. [0003] Micro-channel perforated tube extrusion die is the key process equipment for aluminum alloy hollow tube forming. The aluminum alloy extrusion die is a die with very bad working conditions, which is mainly manifested in three aspects: (1) The working environment temperature is high (450 ° C ~ 500 ° C) and it is in a high temperature state for a long time. Just H13 can't withstand high temp...

Claims

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Application Information

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IPC IPC(8): B21C25/02
Inventor 倪柏钢陶狄锋严岳峰倪宏恩
Owner SHANGYU HONGEN PRECISION MACHINERY
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