| 摘要 |
PURPOSE:To obtain a high-strength sintered steel for sliding members free from cracks and excellent in wear resistance, machinability, and self-lubricity by providing a structure which contains specific amounts of C, Si, Mn, Cr, and P and/or B and in which graphite is precipitated in the pores. CONSTITUTION:Above-mentioned sintered steel has a structure which consists of, by weight, 1.0-2.0% C, 1.0-6.0% Si, 0.1-5.0% Mn, 0.2-5.0% Cr, 0.05-1.0%, in total, of P and/or B, and the balance Fe with inevitable impurities and in which graphite is precipitated in the pores by means of proper sintering temp. and cooling velocity. If necessary, (a) 0.1-5.0%, in total, of one or more elements among Mo, W, and V, or (b) 0.1-5.0%, in total, of one or more elements among Cu, Co, and Ni, or (c) 0.02-0.20% S is added to the above composition independently or in combination.
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