抄録
The effect of rolls made of various tool steels on the lubrication characteristics are examined by rolling annealed low carbon steels by means of the simulation testing machine developed by one of the authors. The lubricity is evaluated by measuring the coefficient of friction for each test and the antiseizure property of rolls is evaluated by the observation of surfaces of rolled workpieces and rolls which are rolled under various conditions of rolling speed and reduction in thickness. The experimental results on the anti-seizure property are discussed based on the calculation of temperature at the interface between roll and workpiece and based on the observation of appearance of friction pick up on surface of rolls. The conclusion obtained are as follows ; (1) The difference of coefficient of friction among roll materials is small. (2) Anti-seizure property depends on the carbide content of roll material and it can be quantitatively evaluated by the calculated interfacial temperature. (3) Carbides on roll surface are effective for friction pick up.
