热处理对多层不锈钢复合材料组织和性能的影响
Influence of Heat Treatment on Microstructure and Mechanical Properties of Multi-layer Stainless Steel Composite
谷坤文1, 袁守谦1, 张 兵1, 卢 斌2
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作者单位：(1. 西安建筑科技大学 冶金工程学院, 陕西 西安 710055; 2. 宝钢不锈钢分公司, 上海 200431)
中文关键字：热处理； 不锈钢； 复合材料； 组织； 力学性能
英文关键字：heat treatment; stainless steel; composite; microstructure; mechanical property
中文摘要：研究了用累积复合轧制技术制备的8层不锈钢复合材料，经(200～900)℃× (0.5～2)h热处理后，微观组织以及力学性能的变化。结果表明：在保温时间不变的条件下，随热处理温度升高，微观组织逐步经历了回复?邛再结晶?邛晶粒长大的过程，抗拉强度和硬度下降，塑性提高，600 ℃以上温度变化较为显著；在温度不变的条件下，随保温时间的延长，组织和力学性能变化不是很明显。试样弯曲90°试验未见明显分层和撕裂迹象，且拉伸试样均为韧性断裂。采用600 ℃×1 h的热处理制度，材料的综合力学性能较佳。
英文摘要：The microstructure and mechanical properties of 8-layered stainless steel composite prepared by accumulative rolling-bond(ARB) after annealing at 200 ℃～900 ℃ for (0.5～2) h were studied. The results show that, as the annealing temperature increasing, with a constant annealing time, the microstructure experiences an evolvement of recovery?邛recrystallization?邛grain growing, and the plasticity increases, but the tensile strength and microhardness decrease at the same time. Above 600 ℃, the change is remarkable. Meanwhile, with a constant temperature, as the annealing time increasing, both microstructure and mechanical properties change slightly. All the specimens exhibit no fracture or delamination when they are bent to 90°, and all the tensile test specimens are ductile fracture. For a better comprehensive mechanical property, annealing at 600 ℃ for 1 h is suggested.