A Heat Treatment Process for Improving the Toughness and Wear Resistance of Alcrsin/Mo Nanocomposite Coatings
A nano-composite coating and wear-resistant technology, applied in metal material coating process, coating, vacuum evaporation plating, etc., can solve the problems of poor oxidation resistance, poor bonding force, tool wear, etc., and achieve high temperature thermal stability Good performance, compact structure, enhanced wear resistance
Active Publication Date: 2022-03-18
TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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Problems solved by technology
CrN is widely used as a hard protective coating. With the continuous increase of cutting speed and cutting temperature, CrN coated tools gradually show shortcomings such as low hardness, poor oxidation resistance, and poor bonding force. The tool will be oxidized due to high temperature on the surface. and severe wear and rapid failure
Method used
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Embodiment 1
[0049] In this embodiment, a vacuum tube furnace is used to conduct vacuum heat treatment on the AlCrSiN / Mo nanocomposite coating to improve the microscopic phase structure and performance of the coating. The specific operation steps are as follows:
[0050] (1) Fix the substrate in a ceramic crucible and place it in a vacuum quartz tube in turn.
[0051] (2) Roughly evacuate to below 10Pa, then open the upper valve and finely evacuate to 3×10 -3 Below Pa, heat to 600°C at a heating rate of 7°C / min, then increase the heating rate to 10°C / min and heat to 660°C, in order to slow down the temperature overshoot, then reduce the heating rate to 8°C / min and heat to 700°C , keep warm for 60min, and cool down to room temperature at a cooling rate of 4°C / min.
[0052] Morphological characterization and performance testing of the AlCrSiN / Mo coating after heat treatment in this embodiment are performed, as follows:
[0053] The S4800 field emission scanning electron microscope (SEM) w...
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Abstract
The invention discloses a heat treatment process for improving the toughness and wear resistance of an AlCrSiN / Mo nanometer composite coating, which belongs to the technical field of coatings. The process uses a vacuum tube furnace to heat the AlCrSiN / Mo composite coating deposited by high-power pulsed magnetron sputtering combined with pulsed DC magnetron sputtering composite coating technology. Before heating, vacuum up to 3×10 ‑3 Below Pa, according to the preset temperature setting, the coating is subjected to corresponding heat treatment to obtain the AlCrSiN / Mo nanocomposite coating after the heat treatment. The composite coating involved in the invention has a simple treatment process and is easy for industrialized production. The AlCrSiN / Mo composite coating prepared by the invention has good toughness and lubricating performance, can significantly enhance the wear resistance of the matrix, and has good chemical stability.
Description
technical field [0001] The invention relates to the technical field of coatings, in particular to a heat treatment process for improving the toughness and wear resistance of AlCrSiN / Mo nanometer composite coatings. Background technique [0002] PVD technology is one of the effective methods to improve the surface properties of materials, and it plays an important role in industrial applications, especially in cutting processing. CrN is widely used as a hard protective coating. With the continuous increase of cutting speed and cutting temperature, CrN coated tools gradually show shortcomings such as low hardness, poor oxidation resistance, and poor bonding force. The tool will be oxidized due to high temperature on the surface. and severe wear and tear and fail quickly. Adding Al to the CrN coating can form an AlCrN coating. During cutting, a dense layer of (Al,Cr) will be formed on the surface of the tool. 2 o 3 The mixed oxide layer prevents further oxidation of the inte...
Claims
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IPC IPC(8): C23C14/58C22F1/16
CPCC23C14/5806C22F1/16
Inventor 王铁钢朱强蒙德强刘艳梅阎兵范其香
Owner TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE