Low Cost Alloy Steel for Oil Tools With High Hardenability and Low Temperature Toughness And Method for Manufacturing The Same

摘要

The present invention relates to a low-cost oil-impregnated alloy excellent in incombustibility and impact resistance at low temperatures and a method for producing the same. Concretely, it is preferable to use a steel material containing 0.31 to 0.45 wt% of C, 0.15 to 0.50 wt% of Si, 0.40 to 1.00 wt% of Mn, 0.35 wt% or less of Cu (not including 0), 0.25 wt% 0.50 to 1.10% by weight of Cr, 0.15 to 0.25% by weight of Mo, 0.0010% by weight or less of B, 030 to 0.040% by weight of Al, 0.0080% by weight or less of N, % Or less (not including 0), S: not more than 0.030 wt% (not including 0), and the balance of Fe and unavoidable impurities.