Grain-Refining Mechanism of Heavy Cold-Rolling of Lath Martensite
This paper analyzed the microstructure evolution and grain-refining mechanism in producing ultra-fine grained steel sheet by heavy rolling of lath martensite. The results show that this technique is composed of three processes with different grain-refining mechanism respectively: i) austenite grains subdivide into homogeneous and tiny martensite laths during quenching; ii) martensite laths are thinned and damaged during heavy rolling; iii) equiaxed ultra-fine ferrite forms during low temperature recrystallization annealing.
Xianghua Liu, Zhengyi Jiang and Jingtao Han
X. Zhao and X. L. Yang, "Grain-Refining Mechanism of Heavy Cold-Rolling of Lath Martensite", Advanced Materials Research, Vols. 148-149, pp. 1701-1704, 2011