Abstract
The present investigation pertains to the study of the mechanical properties and fracture behavior of sinter-forged low alloy steels containing copper (Cu) and molybdenum (Mo) as alloying elements. Elemental powders of atomized iron, graphite, molybdenum, and copper were mixed in suitable proportions using a ball mill, compacted in a 1,000 kN hydraulic press using suitable cylindrical die–punch combination and sintered at 1,000 ± 10°C in a muffle furnace for a period of 120 min in order to yield the alloy compositions (by weight) such as Fe–0.5% C, Fe–0.5% C–1% Cu, Fe–0.5% C–2% Cu, Fe–0.5% C–1% Mo, and Fe–0.5% C–2% Mo. The sintered cylindrical preforms were then subjected to hot upset forging to near theoretical density and subsequently machined off to standard size in order to carry out the mechanical tests such as hardness, tensile, and impact tests. Addition of Cu and Mo to the plain carbon steel has been observed to enhance the tensile strength as well as hardness of the sinter-forged alloys. The presence of Mo carbides in the microstructure of the alloys further reinforces this observation. The impact strength of this alloy has been observed to be reduced considerably due to the addition of the alloying elements.
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References
Danninger H, Jangg G, Weiss B, Stickler R (1993) Microstructure and mechanical properties of sintered iron, Part I—basic considerations and review of literature. Powder Metall Int 25(3):111–116
Danninger H, Jangg G, Weiss B, Stickler R (1993) microstructure and mechanical properties of sintered iron, Part II—experimental study. Powder Metall Int 25(4):170–173
Engstrom U, Lindberg C, Tengzeius J (1992) Powders and processes for high performance PM steels. Powder Metall Int 35(1):67–72
Shang Z, Frisk K, Salwen A, Sandstorm R (2004) Mechanical properties of Fe–Mo–Mn–Si–C sintered steel. Powder Metall Int 43:239–246
Cias A, Mitchell SC, Watts A, Wronski AS (1999) Microstructure and mechanical properties of sintered (2-4) Mn-(0.6-0.8)C steels. Powder Metall Int 42(3):227–233
Wang WC (1994) Properties of high density powder forged iron based alloy. Powder Metall Int 37(3):201–203
Hwang KS, Hsieh CH, Shu GJ (2002) Comparison of mechanical properties of Fe–1.75Ni–0.5Mo–1.5 Cu–0.4C steels made from PIM and press and sinter processes. Powder Metall 45(2):160–166
Youseffi M, Mitchell SC, Wronski AS, Cias A (2000) Sintering, microstructure, and mechanical properties of PM manganese-molybdenum steels. Powder Metall 43(4):353–358
Anklekar RM, Baver K, Agrawal DK, Roy R (2005) Improved mechanical properties and microstructural development of microwave sintered copper and nickel steel PM parts. Powder Metall 48(1):39–46
Philips RA, King JE, Moon JR (2000) Fracture toughness of some high density PM steels. Powder Metall 43(1):43–48
Straffelini G, Fontanari V, Molinari A (1995) Influence of microstructure on impact behaviour of sintered ferrous materials. Powder Metall 38(1):45–51
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Kandavel, T.K., Chandramouli, R. Experimental investigations on the microstructure and mechanical properties of sinter-forged Cu and Mo-alloyed low alloy steels. Int J Adv Manuf Technol 50, 53–59 (2010). https://doi.org/10.1007/s00170-009-2485-x
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DOI: https://doi.org/10.1007/s00170-009-2485-x