| 摘要 |
<p>PURPOSE:To improve fatigue strength by providing an intermediate layer, formed by substantially pure Al or Al alloy which has high temperature hardness smaller than that of a lining layer, between a backing metal and the lining layer. CONSTITUTION:A backing metal 1 formed by a steel sheet, an intermediate layer 2 formed by Al or Al alloy which has small high temperature hardness and a lining layer 3 formed by Al bearing alloy which has large high temperature hardness are formed as a bearing material 4 by pressing them to closely contact with each other into one body. The intermediate layer 2 with small high temperature hardness can be formed from pure Al, or, either or both of 0.1-2% Cu, Mg may be added to said Al. As for Al bearing alloy of large high temperature hardness forming the lining layer 3, it needs to be Al bearing alloy containing at least 3-35wt% Sn and 0.1-10wt% Cr, while one kind or more than two kinds of Si, Mn, Sb, Ti, Zr, Ni, Fe, Nb, V, Mo, Co may be added to this alloy as occasion requires.</p> |
