Effect of Homogenization and Austenization Temperatures on Segregation Reduction of Advanced High-Strength Steels
(Room 202A)
08 May 17
10:30 AM
-
11:00 AM
Tracks:
New Developments & Detailed Microstructural Characterization of AHSS
A mathematical diffusion model has been developed to estimate the percent reduction of microsegregation after homogenization of steel castings. The model presented demonstrates the importance of higher homogenization temperatures for ultrahigh-strength low-alloy (UHSLA) steel castings containing substitutional alloying elements. Only when using homogenization temperatures above 2,000°F (1093°C) can a significant amount of microsegregation reduction of substitutional alloying elements be achieved. The homogenization hold times and temperatures needed in order to effectively reduce microsegregation of alloying elements Mo, Cr, W, Ni and Mn in steels during homogenization or austenization thermal cycles are discussed.