Effect of Solidification Path and Contraction on the Cracking Susceptibility of Carbon Peritectic Steels

作者：Herrera Trejo Martin; Alfaro Lopez Eddy; Ruiz Mondragon Jose Jorge; Castro Roman Manuel de Jesus; Solis Tovar Hugo

来源：Metals and Materials International, 2010, 16(5): 731-737.

DOI：10.1007/s12540-010-1006-7

• solidification
• segregation
• mechanical properties
• phase transformation
• computer simulation

The solidification path and contraction generated during the solidification of three carbon steels were studied. Two of the carbon steels were of hypo-peritectic chemical composition, with 0.11 % C and 0.15 % C, while one of the carbon steels were hyper-peritectic with 0.16 % C. The steels with 0.11 % C and 0.16 % C solidified as expected due to their chemical composition. In contrast, the chemically hypo-peritectic steel with 0.15 % C solidified as hyper-peritectic steel, which was associated with the microsegregation of Mn. For the steel exhibiting a hypo-peritectic solidification path, peritectic transformation occurred at solid fraction values higher than 0.9, where it was assumed that the contraction generated in the mushy shell cannot be fed by the liquid. However, for steels exhibiting a hyper-peritectic solidification path, peritectic transformation began at solid fraction values lower than 0.9, where the contraction generated by the peritectic transformation was partly fed by the liquid. Hence, the highest cracking susceptibility was associated with the hypo-peritectic solidification mode.

• 出版日期2010-10