| 摘要 |
PURPOSE:To obtain the titled Co alloy having improved wear and corrosion resistances by providing a composition contg. essentially specified percentages of Co, Cr, Ni, B, Si and P. CONSTITUTION:This Co alloy for centrifugally coating the inside of a cylinder for a plastic molding machine consists of, by weight, 0.1-10% Ni, 10-30% Cr, 0.5-3.0% B, 2.5-5.0% Si, 0.01-10% P and the balance Co with inevitable impurities or further contains 1-15% W and/or 1-10% Mo. When the alloy is used, a coating layer free from a crack and having high hardness and superior abrasive wear resistance is formed on the inside of a cylinder.
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