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Metal materials protection method (2)

A metal material and metal matrix technology, applied in the field of material science, can solve the problems of large lattice mismatch, peeling, and expansion coefficient difference increase, and achieve excellent corrosion resistance, improve bonding strength, and reduce stress concentration. Effect

Inactive Publication Date: 2007-05-16
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a large lattice mismatch between the ternary (Ti, Al)N coating and the stainless steel substrate, which makes the bonding force between the film and the substrate drop sharply, and even peeling occurs during the preparation of the film.
Moreover, under the same process conditions, as the Al content increases, the bonding strength between the (Ti, Al)N coating and the substrate gradually decreases, and the difference in expansion coefficient increases, which seriously affects the bonding strength between the coating and the substrate.

Method used

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  • Metal materials protection method (2)
  • Metal materials protection method (2)
  • Metal materials protection method (2)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The substrate is made of 1Cr11Ni2W2MoV stainless steel, which has undergone surface pre-grinding, polishing, decontamination, and ultrasonic cleaning with acetone. After the furnace is installed, the background vacuum is pumped to 6.0×10 -3 Pa, heated to the substrate temperature to 300°C, passed Ar gas 0.06Pa, and bombarded and cleaned the sample for 3 minutes under a unipolar pulse bias with a negative peak value of -1000V, a pulse width of 20,000 Hz, and a duty cycle of 30%. During the bombardment, the arc voltage was 16-19V and the arc current was 60A.

[0033] Maintain the substrate temperature at 300°C, adjust the mixed gas of Ar and N2 to 2×10 -1 Pa, where N 2 The partial pressure is at 1.8Pa. When the negative peak value is -600V, the pulse width is 20,000Hz, and the duty cycle is 30%, first turn on the pure Ti target to prepare a TiN coating (1) on the surface of the substrate, the arc current is 60A, and the time is 20min, and then turn on sequentially TiA...

Embodiment 2

[0039] The substrate is made of 1Cr11Ni2W2MoV stainless steel, which has undergone surface pre-grinding, polishing, decontamination, and ultrasonic cleaning with acetone. After the furnace is installed, the background vacuum is pumped to 6.0×10 -3 Pa, heated to the substrate temperature to 300°C, passed Ar gas 0.06Pa, and bombarded and cleaned the sample for 3 minutes under a unipolar pulse bias with a negative peak value of -1000V, a pulse width of 20,000 Hz, and a duty cycle of 30%. During the bombardment, the arc voltage was 16-19V and the arc current was 60A.

[0040] Maintain the substrate temperature at 300°C, adjust the flow of Ar and N 2 mixed gas to 2 x 10 -1 Pa, where N 2 The partial pressure is at 1.8Pa. When the negative peak value is -600V, the pulse width is 20,000Hz, and the duty cycle is 30%, first turn on the pure Ti target to prepare a TiN coating (1) on the surface of the substrate, the arc current is 60A, and the time is 20min, and then turn on sequenti...

Embodiment 3

[0042] The substrate is made of 1Cr11Ni2W2MoV stainless steel, which has undergone surface pre-grinding, polishing, decontamination, and ultrasonic cleaning with acetone. After the furnace is installed, the background vacuum is pumped to 6.0×10 -3 Pa, heated to the substrate temperature to 300°C, passed Ar gas 0.06Pa, and bombarded and cleaned the sample for 3 minutes under a unipolar pulse bias with a negative peak value of -1000V, a pulse width of 20,000Hz, and a duty cycle of 30%. During the bombardment, the arc voltage was 16-19V and the arc current was 60A.

[0043] Maintain the substrate temperature at 300°C, adjust the flow of Ar and N 2 mixed gas to 2 x 10 -1 Pa, where N 2 The partial pressure is at 1.8Pa. When the negative peak value is -600V, the pulse width is 20,000Hz, and the duty cycle is 30%, first turn on the pure Ti target to prepare a TiN coating (1) on the surface of the substrate, the arc current is 60A, and the time is 20min, and then turn on sequentia...

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Abstract

The invention discloses a metal material protecting method, which is characterized by the following: coating hard film with multiple layers of titanium aluminium nitride coating on the surface of metal base; increasing aluminium content and reducing titanium content in the alloy; improving mating property between coating and base as well as combining strength; fitting for coating protection of blade, knife and mould of aviation generator.

Description

technical field [0001] The invention relates to material science, and in particular provides a metal material protection method for coating a multi-layer hard film coating on the surface of a metal substrate. Background technique [0002] The material of the blades of the exhaust air compressor of the aero-engine is mostly made of stainless steel. In the usual dry air, dense Cr can be formed on the surface. 2 o 3 Layer, which can prevent the further oxidation of the base material, so it has better anti-corrosion performance. However, since the blades of the aero-engine exhaust compressor work at 300-600°C, they are often affected by water vapor, active Cl - The combination of ion corrosion and dynamic and static loads causes the compressor blades to corrode rapidly in a short period of time, causing the compressor blades to fail to work normally, which has a great impact on flight safety. Therefore, improving the service life of aircraft components through effective prote...

Claims

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Application Information

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IPC IPC(8): C23C14/06C23C14/34C23C30/00
Inventor 王福会朱圣龙谢冬柏辛丽王世臣
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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