Improved Plasticity and Cold-rolling Workability of Fe–6.5wt%Si Alloy by Warm-rolling with Gradually Decreasing Temperature  

作　　者：Yuanke Mo Zhihao Zhang Hongjiang Pan Jianxin Xie 

机构地区：[1]Key Laboratory for Advanced Material Processing of Ministry of Education,Institute for Advanced Materials and Technology,University of Science and Technology Beijing

出　　处：《Journal of Materials Science & Technology》2016年第5期477-484,共8页材料科学技术（英文版）

基　　金：financially supported by the National Basic Research Program of China(No.2011CB606300);the National HighTech Research and Development Program of China(No.2012AA03A505)

摘　　要：The effects of warm-rolling process on the microstructure, ordering, mechanical properties and cold- rolling workability of Fe-6.Swt%Si alloy were investigated, where three processes of warm-rolling with the same total reduction of 93% were used, including （1） 500 ℃/12 passes/total reduction of 93%, （2） 500 ℃13 passes/total reduction of 50% ＋ 400 ℃19 passes/total reduction of 86%, and （3） 500 ℃13 passes/total reduction of 50% ＋ 400 ℃15 passes/total reduction of 60% ＋ 300 ℃14 passes/total reduction of 64%. The results show that compared with process （1） warm-rolling with constant temperature of 500 ℃, process （2） and process （3） warm-rolling with gradually decreasing temperature can significantly 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.Swt%Si alloy were investigated, where three processes of warm-rolling with the same total reduction of 93% were used, including （1） 500 ℃/12 passes/total reduction of 93%, （2） 500 ℃13 passes/total reduction of 50% ＋ 400 ℃19 passes/total reduction of 86%, and （3） 500 ℃13 passes/total reduction of 50% ＋ 400 ℃15 passes/total reduction of 60% ＋ 300 ℃14 passes/total reduction of 64%. The results show that compared with process （1） warm-rolling with constant temperature of 500 ℃, process （2） and process （3） warm-rolling with gradually decreasing temperature can significantly 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.

关 键 词：Fe–6.5wt%Si alloy Warm-rolling Gradually decreasing temperature Ordering Mechanical property 

分 类 号：TG335[金属学及工艺—金属压力加工]