تأثير بارامترات عملية ال Austempering في البنية و الخواص الميكانيكية للحديد الحبيبي

الملخص EN

The effect of the Austempering parameters on structure and mechanical properties of specimens of ductile iron with the composition of 3.5% carbon, 2.5% silicon, 1.1% nickel, 0.6% copper, 0.23% molybdenum, and 0.3% manganese was studied.

The Austempering is carried out at 315 and 350 C for 30, 60, 120, 180 and 240 min.

The results showed that the Austempering times for optimum mechanical properties of ADI at 315 C and 350 C were 240 and 180 min, respectively.

The results also indicated that Austempering at 350 C, in comparison with Austempering at 315 C, results in higher ductility and toughness and lower strength and hardness.