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Metal materials protection method (1)

A metal material and metal matrix technology, applied in the field of material science, can solve the problems affecting the bonding strength of the coating and the matrix, the large difference in thermal expansion coefficient, and the low bonding strength, so as to achieve good oxidation resistance, high bonding strength, and improve comprehensive performance. 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, the titanium aluminum nitride coating has a greater difference in hardness and substrate, higher brittleness, and a large difference in thermal expansion coefficient with stainless steel and other substrates, and stress concentration is more likely to occur between the coating and the substrate, which will affect the bonding strength between the coating and the substrate.
Studies have shown that under the same sputtering conditions, the bonding strength of (Ti,Al)N to stainless steel is lower than that of TiN

Method used

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  • Metal materials protection method (1)
  • Metal materials protection method (1)
  • Metal materials protection method (1)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1Cr11Ni2W2MoV stainless steel, after surface pre-grinding, polishing, decontamination, acetone ultrasonic cleaning. After the furnace is installed, the background vacuum is pumped to 6.0×10 -3 Pa, heated to the substrate temperature to 300°C, the sample is rotated at 60r / min in front of the Ti target, and Ar is introduced to 0.06Pa, and the negative peak value is -1000V, the pulse width is 20,000Hz, and the duty cycle is 30%. Turn on the Ti target under bias to bombard the cleaned sample for 3 min. During the bombardment, the arc voltage was 16-19V, and the arc current was 60A.

[0038] into Ar and N 2 The mixed gas to 1Pa, where N 2The partial pressure is about 0.6Pa. Using unipolar pulse bias, adjust the negative peak value to 600V, the pulse width to 20,000 Hz, and the duty cycle to 30%; the sample is rotated at 60r / min in front of the Ti target, the Ti target is opened to deposit the TiN bottom layer, and the arc current is 60A. The time is 10 minutes; start th...

Embodiment 2

[0048] 1Cr11Ni2W2MoV stainless steel, after surface pre-grinding, polishing, decontamination, acetone ultrasonic cleaning. After the furnace is installed, the background vacuum is pumped to 6.0×10 -3 Pa, heated to the substrate temperature to 300°C, the sample is rotated at 100r / min in front of the Ti target, and Ar is passed through to 0.06Pa, and the negative peak value is -1000V, the pulse width is 20,000Hz, and the duty cycle is 30%. Turn on the Ti target under bias to bombard the cleaned sample for 3 min. During the bombardment, the arc voltage was 16-19V, and the arc current was 60A.

[0049] into Ar and N 2 The mixed gas to 1Pa, where N 2 The partial pressure is 0.6Pa. Using unipolar pulse bias, adjust the negative peak value to 600V, the pulse width to 20,000Hz, and the duty cycle to 30%; the sample is rotated at 200r / min in front of the Ti target, and the TiAl target with an Al content of 30% is used to deposit the TiN bottom layer. The arc current is 250A, and t...

Embodiment 3

[0051] 1Cr11Ni2W2MoV stainless steel, after surface pre-grinding, polishing, decontamination, acetone ultrasonic cleaning. After the furnace is installed, the background vacuum is pumped to 6.0×10 -3 Pa, heated to the substrate temperature to 300°C, the sample is rotated at 80r / min in front of the Ti target, and Ar is passed through to 0.06Pa, the negative peak value is -1000V, the pulse width is 20,000Hz, and the duty cycle is 30% pulse Turn on the Ti target under bias to bombard the cleaned sample for 3 min. During the bombardment, the arc voltage was 16-19V, and the arc current was 60A.

[0052] into Ar and N 2 The mixed gas to 1Pa, where N 2 The partial pressure is 0.6Pa. Using unipolar pulse bias, adjust the negative peak value to 600V, the pulse width to 20,000Hz, and the duty cycle to 30%; the sample is rotated at 5r / min in front of the Ti target, and the TiAl target with an Al content of 5% is used to deposit the TiN bottom layer. The arc current is 10A, and the t...

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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; fitting for high-speed steel, stainless steel, titanium alloy and high-temperature alloy.

Description

technical field [0001] The invention relates to material science, and in particular provides a metal material protection method for coating a gradient hard film coating on the surface of a metal substrate, and the hard film is a gradient titanium aluminum nitride coating. Background technique [0002] TiN coating has good decorative properties, high hardness, good wear resistance, and is firmly combined with most metal substrates, but the coating has poor oxidation resistance, and its oxidation resistance temperature is only 550 °C. Compared with TiN coating, ternary (Ti, Al)N coating has better high temperature oxidation resistance and high temperature wear resistance, and has received more attention. In particular, the (Ti, Al)N coating with an aluminum-titanium atomic ratio of 1:1 can be used for a long time at 800°C. However, the titanium aluminum nitride coating has a greater difference in hardness and substrate, higher brittleness, and a large difference in thermal ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C30/00C23C14/34
Inventor 王福会朱圣龙冯长杰李明升辛丽王世臣谢冬柏
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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