某牌号低活化马氏体钢U形件成形工艺研究-精密成形工程.PDF

摇摇 110 精 密 成 形 工 程摇 摇 摇 2015年09月 某牌号低活化马氏体钢U形件成形工艺研究 徐杰,李向博 (合肥工业大学 材料科学与工程学院,合肥230009) 摘要: 目的摇 为商用聚变堆包层第一壁生产提供新的加工思路和参考方法。 方法摇 在不同工艺参数 条件下进行了某牌号低活化马氏体钢U形件的成形实验;分析了挤压温度、挤压速度和圆角半径对某 牌号低活化马氏体钢U形件成形效果的影响。 结果摇 试件的尺寸精度达到要求,U型流道直壁厚度 尺寸误差不大于7.6%,直壁高度误差不大于8.0%,截面面积误差小于4.5%,保证了流道的等截面 性。 结论摇 该工艺提高了试件的成形尺寸精度和材料的利用率,具有较大的理论和实践意义。 关键词:低活化钢;U形件;冷却流道;挤压成形 DOI:10.3969/ j.issn.1674鄄6457.2015.05.018 中图分类号:TG376摇 摇 摇 文献标识码:A摇 摇 摇 文章编号:1674鄄6457(2015)05鄄0110鄄05 Forming Process of U鄄shaped Part of Low Activation Martensitic Steel XUJie,LI Xiang鄄bo (School of Material Science and Engineering,Hefei University of Technology,Hefei230009,China) ABSTRACT:The aim of thisworkwas to provide new processing ideas and reference methods for production of the first wall of commercial fusion reactor blanket. The forming experiments of low activation martensitic steel U鄄shaped part were conducted under different process parameters. The influences of different extrusion temperature,extrusion speed and fillet radius on theforming result of low activation martensitic steel U鄄shaped part were analyzed. The dimensional precision of molded parts met the requirements. Thewallthicknessdimensionerror of theU鄄shapedpartwasnomorethan7.6%,and the straight wallheighterrorwasnomorethan8.0%,andtheerrorofcross鄄sectionalareawaslessthan4.5%,guarantee鄄 ing the equal section of the flow passage. In conclusion,this process improved the forming dimensional precision of the specimens and the utilization rate of material,and has great theoretical and practical significance. KEY WORDS:low activation steel;U鄄shaped part;cooling flow channel;extrusion formin