Effect of Aging Treatment of Ni-Based/TiC Coatings by Induction Cladding
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JMEPEG (2020) 29:5322–5328 https://doi.org/10.1007/s11665-020-05036-w
Effect of Aging Treatment of Ni-Based/TiC Coatings by Induction Cladding Bensheng Huang, Songsong Wu, Yuxiao Gao, and Lingzhi Chen (Submitted December 18, 2019; in revised form May 23, 2020; published online August 14, 2020) The effects of aging temperature and holding time on the microstructure and wear resistance of inductionclad nickel-based/TiC alloy coatings were investigated. The nickel-based/TiC alloy powder was inductionclad on to 35CrMo steel substrate. Optical microscope and scanning electron microscope equipped with energy-dispersive spectroscopy were used to study the microstructure of the coatings, while x-ray diffractometry was utilized to investigate the existing phases on the coatings. Micro-hardness and wear behavior were measured by digital micro-hardness tester and dry sliding wear tester, respectively. The results showed that the coatings are mainly composed of Ni4B3, (Fe,Ni)23C6, Fe-Cr-Ni, NiFe, Ni2B and CrO0.87 phases. As the rise of aging temperature and extension of holding time, the unstable compounds gradually turn into the stable compounds. Compared with the composite coating without heat treatment, the micro-hardness and wear resistance of the composite coating after heat treatment have been greatly improved. The composite coating with the process parameter of 530 °C for 8 h has the highest microhardness and the best wear resistance. The performance of the composite coating with the process parameter of 580 °C for 2 h is second only to that of the coating at 530 °C for 8 h. The wear mechanism of the composite coatings was discussed. Keywords
aging treatment, composite coating, high-frequency induction cladding, micro-hardness, wear resistance
1. Introduction Rod pump production system is characterized with simple structure, strong adaptability and long lifespan. It is the most widely used mechanical production mode at home and abroad. 35CrMo steel is one of the most widely used rod pump materials. The common failure mode of sucker rod is typical corrosion fatigue fracture (Ref 1). Bai et al. (Ref 2) proposed the preparation coating to improve the performance of both wear resistance and corrosion resistance by induction cladding of the sucker rod. Ni60A alloy is a common hard alloy, containing B, Si and a large amount of Cr, among which Cr can improve corrosion resistance of the coating, and B and Si have the functions of deoxidation and slagging (Ref 3). In addition, adding a certain amount of hard particles in the alloy can improve the micro-hardness, wear resistance and corrosion resistance of the coating. Feng et al. (Ref 4) produced in situ TiC-TiN-reinforced Fe-based composite coatings on Q235 by plasma cladding using Ti and B4C as cladding materials. Zhang et al. (Ref 5) investigated the AISI 420/VC metal matrix composites with different weight percentages of vanadium carbide (VC) by a high-power direct diode laser. The results showed that the erosion resistance of the cladded layer was increased with the incr
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