摘要
由于单相NiAl基合金存在低温脆性和高温强度低等缺点,严重限制了NiAl基合金构件的实际应用和发展,因此针对低温脆性导致其变形加工困难等问题,开展了层状结构NiAl基合金薄壁构件的成形和性能调控研究。在630℃/20 MPa/2 h反应制备出具有协调变形能力的Ni/Ni_(2)Al_(3)叠层板,测试结果发现该板材在800℃时表现超过100%断裂伸长率,可以满足各种复杂构件的成形需求。利用热态气压成形成形出膨胀率为30%的Ni/Ni_(2)Al_(3)叠层变径管件,再经1100℃/4 h高温致密化反应处理,成功获得兼具室温塑性和高温强度的多相层状结构NiAl/Ni3Al基合金变径管。
Due to the shortcomings of the single-phase NiAl-based alloy with low temperature brittleness and low strength at high temperature,the practical application and development of NiAl-based alloy components were seriously limited.Therefore,to solve the problems such as the deformation and machining difficulties caused by low temperature brittleness,the research on forming and property and control of NiAl-based alloy thin-walled components with layered structure was carried out.The Ni/Ni_(2)Al_(3)laminated sheets with coordinated deformation ability were prepared at 630℃/20 MPa/2 h.The test results find that the fracture elongation of the sheets is up to 100%at 800℃,which meets the forming needs of various complex components.The Ni/Ni_(2)Al_(3)laminated tube with variable sections and expansion rate of 30%was formed by hot gas forming.After high temperature densification reaction at 1100℃/4 h,multiphase layered NiAl/Ni3Al-based alloy tubes with both room temperature plasticity and high temperature strength were successfully prepared.
作者
王宝
林鹏
郑闻睿
秦锦涛
孔令娇
WANG Bao;LIN Peng;ZHENG Wen-rui;QIN Jin-tao;KONG Ling-jiao(Shanxi Key Laboratory of Metal Forming Theory and Technology,School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;School of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《塑性工程学报》
北大核心
2025年第4期50-57,共8页
Journal of Plasticity Engineering
基金
山西省基础研究计划项目(202303021222179)
太原科技大学博士启动基金资助项目(20232022)。
关键词
热态气压成形
变径管
NIAL基合金
hot gas forming
tube with variable cross sections
NiAl-based alloy
