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Piston with (Ti, Al)N multilayer heat insulating and wear resisting super-thick coating on surface and preparation method and application of piston

A multi-layer heat insulation and piston technology, which is applied in the coating, piston, metal material coating process, etc., can solve the problems of easy damage, easy ablation of pistons, etc.

Active Publication Date: 2018-01-19
XIANGTAN 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 overcome the deficiencies of the above-mentioned prior art, solve the problem of easy ablation and damage of the piston, prolong the service life of the piston, improve the reliability of the use of the piston, and meet the requirements of high power consumption and low emission. Starting from alloy pistons, provide a piston with (Ti,Al)N multi-layer heat-insulating and wear-resistant ultra-thick coating on the surface, its preparation technology and application

Method used

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  • Piston with (Ti, Al)N multilayer heat insulating and wear resisting super-thick coating on surface and preparation method and application of piston
  • Piston with (Ti, Al)N multilayer heat insulating and wear resisting super-thick coating on surface and preparation method and application of piston
  • Piston with (Ti, Al)N multilayer heat insulating and wear resisting super-thick coating on surface and preparation method and application of piston

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Experimental program
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Effect test

Embodiment 1

[0071] The number of processed samples is 5; in the processing of each sample, except for the different flow rate of nitrogen gas in step two, the others are completely the same.

[0072] step one:

[0073] Using titanium alloy as the arc source, preferably titanium aluminum alloy with a purity greater than or equal to 99%, adopts the magnetic filter cathode vacuum arc deposition technology. Before the magnetic filter cathode vacuum arc deposition, control the vacuum chamber in the magnetic filter cathode vacuum arc deposition equipment The pressure is 1.0~4.5×10 -3 Pa; when the magnetic filter cathode vacuum arc is deposited, control the arc starting current to 100A, the curved tube magnetic field to 1.5A, the straight tube magnetic field to 3.5A, and adjust the duty cycle to 90%; the order is -1000V, -900V, -800V, Deposit at -700V, -600V, -500V, -400V, -300V, -200V, deposit at each negative pressure point for 30s, after the deposition at -200V is completed, deposit at negat...

Embodiment 2

[0081] Step 1: Using titanium alloy as the arc source, preferably titanium-aluminum alloy with a purity greater than or equal to 99% as the arc source, using magnetic filter cathode vacuum arc deposition technology, before magnetic filter cathode vacuum arc deposition, control the magnetic filter cathode vacuum arc deposition equipment The pressure of the medium vacuum chamber is 1.0~4.5×10 -3 Pa; when the magnetic filter cathode vacuum arc is deposited, control the arc starting current to 100A, the curved tube magnetic field to 1.5A, the straight tube magnetic field to 3.5A, and adjust the duty cycle to 90%; the order is -1000V, -900V, -800V, Deposit at -700V, -600V, -500V, -400V, -300V, -200V, deposit at each negative pressure point for 30s, after the deposition at -200V is completed, deposit at negative pressure -100V for 20min; in a clean and dry piston A dense TiAl transition layer is obtained on the surface of the substrate;

[0082] Step 2: Turn on the reaction gas swi...

Embodiment 3

[0092] Step 1: Using titanium-aluminum alloy with a purity greater than or equal to 99% as the arc source, using the magnetic filter cathode vacuum arc deposition technology, before the magnetic filter cathode vacuum arc deposition, control the pressure of the vacuum chamber in the magnetic filter cathode vacuum arc deposition equipment to 1.0~ 4.5×10 -3 Pa; when the magnetic filter cathode vacuum arc is deposited, control the arc starting current to 100A, the curved tube magnetic field to 1.5A, the straight tube magnetic field to 3.5A, and adjust the duty cycle to 90%; the order is -1000V, -900V, -800V, Deposit at -700V, -600V, -500V, -400V, -300V, -200V, deposit at each negative pressure point for 30s, after the deposition at -200V is completed, at negative pressure -100V, deposit for 15min; on a clean and dry piston A dense TiAl transition layer is obtained on the surface of the substrate;

[0093] Step 2: Turn on the reaction gas switch, use titanium alloy as the arc sour...

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Abstract

The invention relates to a piston with a (Ti, Al)N multilayer heat insulating and wear resisting super-thick coating on the surface and a preparation technology and application of the piston. The structure of the piston comprises two schemes. According to the first scheme, the piston comprises a base, a TiAl transition layer and a TiAlN clad layer, and the TiAl transition layer evenly wraps the base; and the TiAlN clad layer evenly wraps the TiAl transition layer. According to the second scheme, the piston comprises a base, a first TiAl transition layer, a first TiAlN clad layer, a second TiAltransition layer and a second TiAlN clad layer, and the piston structurally comprises the base, the first TiAl transition layer, the first TiAlN clad layer, the second TiAl transition layer and the second TiAlN clad layer in sequence. According to application of the piston, the piston is used for an internal combustion engine. The designed piston surface has heat insulation performance, wear resistance, oxidation resistance and heat shock resistance, and the service life of the piston is effectively prolonged.

Description

technical field [0001] The invention relates to a piston with (Ti, Al)N multi-layer heat-insulating and wear-resistant ultra-thick coating on the surface, as well as its preparation technology and application, belonging to the technical field of piston design and preparation. Background technique [0002] In recent years, with the rapid improvement of manufacturing technology and increasingly severe environmental pollution, the engine must develop in the direction of high power and low emission. This makes the power density and explosion pressure of the engine continuously increase, which directly leads to a significant increase in the mechanical load and thermal load of the piston. Aluminum and aluminum alloy materials have the characteristics of high strength, low density, and easy processing, and are widely used in the field of internal combustion engine pistons. At present, aluminum-silicon alloys are mostly used in the industry to manufacture engine pistons. Most of th...

Claims

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Application Information

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IPC IPC(8): C23C14/16C23C14/06C23C14/32F02F3/10F02F3/14
Inventor 齐福刚罗文忠欧阳晓平赵镍曹红帅李贝贝钟向丽刘应都陈静
Owner XIANGTAN UNIV
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