Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-18 Cooperative journals: 《材料研究学报》
Abstract： Precipitation behavior of second phase in two micro-carbon steels with different amounts of Nb and Ti were investigated using SEM and TEM technique. In the meanwhile, the effect of precipitates on microstructure, texture evolution and properties of the micro-carbon steels was investigated by XRD and EBSD technique. Results show that precipitates in the micro-carbon steels were mainly consisted of larger size (Nb, Ti)(C, N) composite particles and finer Nb-based carbide and carbonitride dispersed in matrix. With the increasing of Nb and Ti addition the fine second phase particles increased significantly, which strongly inhibit the development of <111>//ND fiber texture during recrystallization, especially for {223}<110> and {111}<110> orientation. As for micro-carbon steel with low content of Nb and Ti, a good combination between strength and deep drawing ability can be acquired due to the occurrence of a matrix of polygonal ferrite and martensite transformation during fast cooling process.
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