摘要:
With regard to an Al-Cr-Zr based alloy having annealing temper, a high temperature strength at 180 to 200 degrees C is ensured. An aluminum alloy for a plain bearing having improved fatigue resistance is to be provided. An aluminum alloy for a plain bearing solving the problems has a composition of 3 to 7 mass% Mg, 0.1 to 0.3 mass% Cr, and 0.1 to 0.3 mass% Zr, with the balance being Al and inevitable impurities. A principal structure of the aluminum alloy consist of an Al matrix containing solute Mg, minute particles of Cr, and Zr.
摘要:
In a bearing apparatus provided herein a hard steel shaft is an opposite shaft of an Al-Sn-Si based alloy plain bearing. Its wear resistance is enhanced. The bearing apparatus comprises a steel shaft having hardness of Hv 500 or more at least on a surface thereof, and a plain bearing. The plain bearing is formed of an aluminum alloy containing 2 to 10 mass% of Si, 8 to 18 mass% Sn, and the balance being Al and unavoidable impurities, wherein the volume of Sn phase is 50% or more of the volume of the Si particles( the average particle diameter of Si of the aluminum alloy is 4 to 10 µm). The aluminum alloy has a hardness of Hv 45 or more.