测定并分析了中碳和中低碳C-Si-Mn-B系贝氏体钢的抗拉强度及强化机制.结果表明,该钢具有较高的强度和良好的塑性.减小贝氏体铁素体板条宽度和提高板条内的位错密度对贝氏体的强化有较大贡献.在贝氏体/马氏体复相组织的强化机制中,应考虑下贝氏体板条对原奥氏体晶粒的分割细化效应以及马氏体对贝氏体板条变形的约束作用.由强化机制计算的强度值与实测值有较好的一致性.
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