| 摘要 |
PURPOSE:To obtain a sucker rod for an oil well having superior resistance to corrosion and corrosion fatigue by heat treating a steel contg. prescribed percentages of C, Si, Mn, P, S, Cr and Sol.Al at a prescribed temp. CONSTITUTION:A steel contg., by weight, 0.1-0.3% C, 0.1-0.8% Si, 0.3-1.2% Mn, <=0.025% P, <=0.01% S, 8-15% Cr and 0.001-0.05% Sol.Al is refined. The surface of the steel is subjected to shot blasting, and the steel is quenched after heating in a carburizing atmosphere at 900-1,000 deg.C. The steel is then tempered at 600-700 deg.C and subjected to shot peening. |
