The Resistance of TiN Coatings to Solid Particle Erosion Using Different Deposition Methods
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TECHNICAL ARTICLE—PEER-REVIEWED
The Resistance of TiN Coatings to Solid Particle Erosion Using Different Deposition Methods Chunyu Feng . Qi Xie . Lei Yang . Cong Shen . Xin Wei
Submitted: 13 March 2020 Ó ASM International 2020
Abstract It was found that the corrosion resistance of WC was significantly improved with the addition of a TiN coating. Erosion testing was done using solid particles to quantify dynamic erosion processes in TiN-coated specimens. TiN coatings were deposited on different specimens using physical vapor deposition (PVD), chemical vapor deposition (CVD), or plasma chemical vapor deposition (PCVD). Results from the erosion tests indicated that the corrosion resistances of the WC-Co cemented carbide samples were improved following all three coating processes. The order of corrosion resistance in terms of strength was TiN-PVD [ TiN-CVD [ TiN-PCVD [ uncoated specimen. The TiN-PVD sample also had the highest resistance to erosion of the three sample types. The principal factors that influence erosion resistance are adhesion forces and the ratio of the hardness (H) of a material to the elastic modulus (E) of the material. Experimental results from this study demonstrated that the TiN-PVD sample had a large adhesion force (42 N) and higher H/E and H3/E2 values relative to the other sample types.
C. Feng Key Laboratory of Oil and Natural Gas Equipment, Ministry of Education, Chengdu 610500, People’s Republic of China C. Feng Q. Xie (&) X. Wei School Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, People’s Republic of China e-mail: [email protected] L. Yang C. Shen PetroChina Tarim Oilfield Company, Korla 841000, People’s Republic of China
Keywords TiN coating Erosion resistance Mechanical properties
Introduction A specialized, cage-type throttle valve is frequently used during natural gas exploitation to balance the pressure difference between the high pressure gas at the bottom of a well and the allowable pressure value in a pipeline before the pipeline reaches a treatment plant. High pressure gases can adversely impact the throttle valve spool, and failures due to the erosion of an alloy are becoming increasingly common. Results from the current study suggest that the loss of the surface of the natural gas spool material found in the spool during throttling is due to fatigue cracking and erosion and oxidation reactions. Surface coatings could be used to improve the erosion resistance of cemented carbide valve core surfaces and could aid in the inhibition of oxidative phenomena. A matrix matching study, based on the physical and mechanical properties of candidate coating materials, was done to identify TiN coating materials that could be appropriate for real-world use. TiN coatings are widely used for the protection of tools [1–3]. These coatings generally have high hardness values, low coefficients of friction, and good corrosive and oxidative wear resistances [4–7]. TiN coatings can improve the erosion resistance of a material significantly [8, 9]. TiN coating
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