Effect of Heat Treatment Process on The Microstructure and Mechanical Properties of The Spray Coating Ni-Cr on CT38 Steel

Anh Tuan Hoang, Thi Thanh Van Tran, Van Bach Nguyen, Duong Nam Nguyen


The thermal spray has been commonly used in several applications to replace the plating technology due to high adhesion, low cost, and environmental pollution. The thermal coating is usually used to rehibilitate the small disrepair of the crankshaft but the dimension and mechanical properties of such parts are still maintaned. Commonly, the microstructure and mechanical properties are greatly affected by depth of thermal coating, and thermal coating needs to be conducted the heat treatment to homogenize the microstructure between metals of coating and base metals as well as to improve the adhesion, hardness, and wear intensity. In this work, the effects of heat treatment on the microstructure and mechanical properties of the coating layer based on 80Ni-20Cr onto the surface of CT38 steel were conducted. SEM images and EDS analysis were used to determine the distribution of elements before and after heat treatment. In addition, mechanical properties such as Vicker hardness (HV), wear intensity, and adhesion were practically measured. As a result, after heat treatment by annealing under 1100oC during 8h, HV and adhesion were significantly higher than the case of non-heat treatment; meanwhile, wear intensity was found with 3 times lower compared to the unheated sample. The strong bi-lateral diffusion between Cr from coating layer and C from CT38 steel component to form carbide along with a formation of bond Ni-Fe was thought to be the main cause resulting in the improvement of mechanical properties and was demonstrated in this study.


thermal spray; heat treatment; microstructure; mechanical properties.

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A. T. Hoang, D. N. Nguyen, and V. V. Pham, “Heat Treatment Furnace For Improving The Weld Mechanical Properties: Design and Fabrication,†Int. J. Mech. Eng. Technol., vol. 9, no. 6, pp. 496–506, 2018.

X. D. Pham, A. T. Hoang, and D. N. Nguyen, “A Study on the Effect of the Change of Tempering Temperature on the Microstructure Transformation of Cu-Ni-Sn Alloy,†Int. J. Mech. Mechatronics Eng., vol. 18, no. 04, pp. 27–34, 2018.

X. D. Pham, A. T. Hoang, D. N. Nguyen, and V. V Le, “Effect of Factors on the Hydrogen Composition in the Carburizing Process,†Int. J. Appl. Eng. Res., vol. 12, no. 19, pp. 8238–8244, 2017.

T. N. Le, M. K. Pham, A. T. Hoang, and D. N. Nguyen, “Microstructures and elements distribution in the transition zone of carbon steel and stainless steel welds,†J. Mech. Eng. Res. Dev., vol. 41, no. 3, pp. 27–31, 2018.

A. T. Hoang, V. V. Le, D. N. Nguyen, and A. X. Nguyen, “A study of the changes in microstructure and mechanical properties of multi-pass wellding between 316 stainless steel and low carbon steel,†J. Adv. Manuf. Technol., vol. 12, no. 2, pp. 23–35, 2018.

D. N. Nguyen, A. T. Hoang, M. T. Sai, M. Q. Chau, and V. V. Pham, “Effect of Sn component on properties and microstructure Cu-Ni-Sn alloys,†J. Teknol., vol. 80, no. 6, pp. 43–51, 2018.

P. L. Fauchais, J. V. R. Heberlein, and M. I. Boulos, “Overview of Thermal Spray,†in Thermal Spray Fundamentals, Springer, 2014, pp. 17–72.

C. U. Hardwicke and Y.-C. Lau, “Advances in thermal spray coatings for gas turbines and energy generation: a review,†J. Therm. Spray Technol., vol. 22, no. 5, pp. 564–576, 2013.

K. Von Niessen and M. Gindrat, “Plasma spray-PVD: a new thermal spray process to deposit out of the vapor phase,†J. Therm. spray Technol., vol. 20, no. 4, pp. 736–743, 2011.

A. C. Savarimuthu et al., “No Title,†in Proceedings of 1st International Thermal Spray Conference, 2000, p. 1095.

P. L. Ko and M. F. Robertson, “Wear characteristics of electrolytic hard chrome and thermal sprayed WC–10 Co–4 Cr coatings sliding against Al–Ni–bronze in air at 21 C and at− 40 C,†Wear, vol. 252, no. 11–12, pp. 880–893, 2002.

N. Espallargas, J. Berget, J. M. Guilemany, A. V. Benedetti, and P. H. Suegama, “Cr3C2–NiCr and WC–Ni thermal spray coatings as alternatives to hard chromium for erosion–corrosion resistance,†Surf. Coatings Technol., vol. 202, no. 8, pp. 1405–1417, 2008.

A. Ganvir, N. Curry, N. Markocsan, P. Nylén, and F.-L. Toma, “Comparative study of suspension plasma sprayed and suspension high velocity oxy-fuel sprayed YSZ thermal barrier coatings,†Surf. Coatings Technol., vol. 268, pp. 70–76, 2015.

S. Matthews, B. James, and M. Hyland, “High temperature erosion–oxidation of Cr3C2–NiCr thermal spray coatings under simulated turbine conditions,†Corros. Sci., vol. 70, pp. 203–211, 2013.

N. Bala, H. Singh, and S. Prakash, “Accelerated hot corrosion studies of cold spray Ni–50Cr coating on boiler steels,†Mater. Des., vol. 31, no. 1, pp. 244–253, 2010.

Y. Zhang, X. Peng, and F. Wang, “Development and oxidation at 800 C of a novel electrodeposited Ni–Cr nanocomposite film,†Mater. Lett., vol. 58, no. 6, pp. 1134–1138, 2004.

H. Singh, D. Puri, and S. Prakash, “Some studies on hot corrosion performance of plasma sprayed coatings on a Fe-based superalloy,†Surf. coatings Technol., vol. 192, no. 1, pp. 27–38, 2005.

L. Fedrizzi, L. Valentinelli, S. Rossi, and S. Segna, “Tribocorrosion behaviour of HVOF cermet coatings,†Corros. Sci., vol. 49, no. 7, pp. 2781–2799, 2007.

A. Lanzutti, M. Lekka, E. Marin, and L. Fedrizzi, “Tribological Behavior of Thermal Spray Coatings, Deposited by HVOF and APS techniques, and composite electrodeposits Ni/SiC at both room temperature and 300 C,†Tribol. Ind., vol. 35, no. 2, pp. 113–122, 2013.

T. Sundararajan, S. Kuroda, K. Nishida, T. Itagaki, and F. Abe, “Behaviour of Mn and Si in the spray powders during steam oxidation of Ni-Cr thermal spray coatings,†ISIJ Int., vol. 44, no. 1, pp. 139–144, 2004.

A. Sunde, “Properties of thermal sprayed coatings for internal use in pipes and bends.†NTNU, 2015.

M. H. Staia, M. Suarez, D. Chicot, J. Lesage, A. Iost, and E. S. Puchi-Cabrera, “Cr2C3–NiCr VPS thermal spray coatings as candidate for chromium replacement,†Surf. Coatings Technol., vol. 220, pp. 225–231, 2013.

M. K. Pham, D. N. Nguyen, and A. T. Hoang, “Influence of Vanadium Content on the Microstructure and Mechanical Properties of High-Manganese Steel,†Int. J. Mech. Mechatronics Eng., vol. 18, no. 2, pp. 141–147, 2018.

DOI: http://dx.doi.org/10.18517/ijaseit.9.2.7891


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