硼对HSLA钢高温塑性变形行为的影响  

Effect of Boron on High Temperature Plastic Deformation Behavior of HSLA Steel

作　　者：金莹[1] 朱建雷 邓超 崔慧娟[1] JIN Ying;ZHU Jianlei;DENG Chao;CUI Huijuan(School of Mechanical and Electrical Technology,Xianyang Vocational Technical College,Xianyang 712000,China;School of Materials Science and Engineering,Xi'an University of Technology,Xi'an 710048,China)

机构地区：[1]咸阳职业技术学院机电学院,陕西咸阳712000 [2]西安理工大学材料科学与工程学院,陕西西安710048

出　　处：《铸造技术》2021年第9期759-762,共4页Foundry Technology

基　　金：陕西省教育厅专项科学研究计划(21JK0972);咸阳职业技术学院博士科研启动基金项目(2021BK02)。

摘　　要：通过高温热拉伸实验研究了硼对HSLA钢高温塑性变形行为的影响。研究了不同温度下的断面收缩率、力-行程曲线以及断口组织形貌。结果表明,含硼试验钢的热塑性有明显改善,其塑性低谷变浅;另一方面,硼对奥氏体晶界可以起到强化作用,可起到应力蓄积作用,进而产生足够的驱动力和激活能促使动态再结晶提前发生,使高塑性区向低温区偏移。The effect of boron on the plastic deformation behavior of HSLA steel at high temperature was studied by high temperature tensile test.Section shrinkage,force-stroke curve and microstructure of fracture were studied at different temperatures.The results show that the thermoplasticity of boron tested steel is improved obviously,and its plastic trough becomes shallower.On the other hand,boron can strengthen austenite grain boundaries and play a role of stress accumulation,and then generate enough driving force and activation energy to advance the dynamic recrystallization,so that the high plastic zone to the low temperature zone shift.

关 键 词：硼微合金化 动态再结晶 断裂行为 热塑性 高温拉伸 

分 类 号：TG142[一般工业技术—材料科学与工程] TG113[金属学及工艺—金属材料]