冷間圧延用ロールの潤滑特性におよぼす炭化物諸性質の影響

抄録

The effect of rolls made of iron-chromium-carbon alloys and high speed steels on the lubrication characteristics are examined by rolling annealed low carbon steel sheets. Coefficients of friction for reduction in thickness and limit reductions of friction pick up are measured using the simulation testing machine of sliding-rolling type. The relation between the experimental results on the limit reductions on the one hand and carbide type, carbide area and carbide morphology of roll materials on the other is discussed. The conclusion obtained are as follows ; (1) The difference of coefficient of friction among roll materials is small in case that surface roughness of roll is constant. (2) The limit reduction of friction pick up has a strong correlation with the carbide mean spacing of roll materials. (3) Controlling the carbide spacing small is effective for prevention of friction pick up.