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HSS work rolls have been utilized for both early and last finishing stands in hot strip mills due to their high hardness,good wear resistance and high temperature properties.During hot rolling,the work rolls are subjected to rapid changes of mechanical and thermal loads on their surface layers due to the alternated contact with the hot strip and the cooling water in every revolution.It is important to understand the thermal and wear behaviours of HSS work rolls under industrial service conditions.In the present study,HSS roll samples from damaged rolls during hot rolling service have been characterised to explore the role of oxide scale in the deterioration process of hot roll surface during rolling.From nano-indentation/nano-scratch tests,the modulus of elasticity,hardness of the oxide scale and the scale thickness were found to affect the friction of the oxide surface.A series of wear tests on HSS was carried out on a high temperature oxidation/wear roller-on-disc wear test rig which can emulate the contact conditions of hot rolling.Further investigation on the wear behaviour of HSS material was then carried out according to the temperature guidance provided by a FEM modelling analysis of the temperature evolution within a work roll based on Baosteel hot strip rolling conditions.