论文部分内容阅读
The effects of warm-rolling process on the microstructure,ordering,mechanical properties and coldrolling workability of Fe–6.5wt%Si alloy were investigated,where three processes of warm-rolling with the same total reduction of 93% were used,including(1)500°C/12 passes/total reduction of 93%,(2)500°C/3passes/total reduction of 50%+400°C/9 passes/total reduction of 86%,and (3)500°C/3 passes/total reduction of 50%+400°C/5 passes/total reduction of 60%+300°C/4 passes/total reduction of 64%.The results show that compared with process (1) warm-rolling with constant temperature of 500°C,process(2) and process (3) warm-rolling with gradually decreasing temperature can signi?cantly improve the room temperature plasticity and cold-rolling workability of the Fe–6.5wt%Si alloy.For example,the three point bending fracture deflections are increased by 54.5% and 81.8% for processes (2) and (3),respectively,and the maximum reductions of single pass cold-rolling without edge crack are increased from 50% of process(1)to 55% of process (2) and 62% of process(3),respectively.The plasticity improvement of the Fe–6.5wt%Si alloy can be attributed to both reductions of surface oxidation degree and order degree of the alloy by warm-rolling with gradually decreasing temperature.
The effects of warm-rolling process on the microstructure, ordering, mechanical properties and cold rolling workability of Fe-6.5 wt% Si alloy were investigated, where three processes of warm-rolling with the same total reduction of 93% were used, including ) 500 ° C / 12 passes / total reduction of 93%, (2) 500 ° C / 3passes / total reduction of 50% + 400 ° C / 9 passes / total reduction of 86%, and (3) 500 ° C / 3 passes / total reduction of 50% + 400 ° C / 5 passes / total reduction of 60% + 300 ° C / 4 passes / total reduction of 64%. The results show that compared with process (1) warm-rolling with constant temperature of 500 ° C, process (2) and process (3) warm-rolling with gradually decreasing temperature can signi? cantly improve the room temperature plasticity and cold-rolling workability of the Fe-6.5wt% Si alloy. For example, the three point bending fracture deflections are increased by 54.5% and 81.8% for processes (2) and (3), respectively, and the maximum reductions of single pass cold-rolling without edge crack are increa sed from 50% of process (1) to 55% of process (2) and 62% of process (3), respectively. The plasticity improvement of the Fe-6.5wt% Si alloy can be attributed to both reductions of surface oxidation degree and order degree of the alloy by warm-rolling with gradually decreasing temperature.