Effects of manganese, chromium, and molybdenum on the isothermal transformation of austenite in eutectoid steels

Springer Science and Business Media LLC - Tập 4 - Trang 247-252 - 1986
Y. J. Park1, F. B. Fletcher2
1Amax Materials Research Center, Ann Arbor
2AMAX, Inc., Greenwich

Tóm tắt

Isothermal transformation diagrams of a series of eutectoid steels alloyed with 0.75% C, 0.28% Si, 0.43 to 0.91% Mn, 0 to 0.76% Cr, and 0 to 0.34% Mo were determined using a dilatometer. The effects of manganese, chromium, and molybdenum on the transformation behavior of these eutectoid steels were then evaluated by multiple linear regression analysis of the isothermal transformation diagram data. The regression analysis shows that molybdenum has its greatest effect in delaying the austenite decomposition at high temperatures (650 to 500° C), chromium at intermediate temperatures (550 to 500° C), and manganese at low temperatures (350 to 300° C). The results imply that molybdenum has a much greater effect in suppressing the formation of pearlite than it has in suppressing bainite, while manganese suppresses both the pearlite and the bainite transformation.

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Springer Science and Business Media LLC

Tập 4

247-252

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