Enhancing the Abrasive Wear Performance of Heat Treated Ni Coatings through Different Cooling Strategies

Volume 6 Issue 4 August - October 2016

Research Paper

Enhancing the Abrasive Wear Performance of Heat Treated Ni Coatings through Different Cooling Strategies

Sushil Kumar*, Sunny Zafar**, Navneet Arora***

* Assistant Professor, Department of Mechanical Engineering, Rayat Bahra Institute of Engineering & Nano-Technology, Punjab, India.

** Assistant Professor, School of Engineering, I.I.T. Mandi, Himachal Pradesh, India.

*** Professor, Department of Mechanical and Industrial Engineering, I.I.T. Roorkee, Uttrakhand, India.

Kumar, S., Zafar, S., and Arora, N. (2016). Enhancing the Abrasive Wear Performance of Heat Treated Ni Coatings through Different Cooling Strategies. i-manager’s Journal on Mechanical Engineering, 6(4), 7-13. https://doi.org/10.26634/jme.6.4.8291

Abstract

In the present work, Ni based powder was deposited on stainless steel substrate using a low velocity flame spray technique. The coating of thickness 300 μm was developed using a neutral oxy-acetylene flame. To enhance the microstructure and wear resistance, the coated specimens were heat treated and cooled using various cooling strategies, such as, air, water, and furnace cooling. The microstructure of the as-sprayed and heat treated specimens were studied using SEM. Some unmelted particles and pores were also present in the as-sprayed specimen. The watercooled specimen exhibits equiaxed structure, while the furnace cooled coating demonstrates a coarse structure. The microhardness of the specimens was evaluated using a Vicker's microhardness tester. The water-cooled specimen exhibits highest hardness and wear resistance.