摘要
采用大功率CO_2快轴流激光器进行了Ti-7Al-2Zr-2Mo-2V的激光弯曲成形,研究了累积线能量密度对钛合金显微组织和维氏硬度的影响。提出了累积能量密度门槛值的概念,累积线能量密度高于门槛值时,累积线能量密度对钛合金显微组织和显微硬度有影响,低于门槛值时没有影响。随着累积线能量密度的增加,HAZ尺寸呈二次曲线增加。
This paper investigates laser forming of Ti-7Al-2Zr-2Mo-2V with a 2000 W fast-axial flow CO2 laser unit. The study has been on the influence of accumulated energy density (AED) on the microstructure and Hvs hardness of laser bent Ti-7Al-2Zr-2Mo-2V. The paper presents a concept of critical value on AED. Microscopy observations have revealed that there are no effect on the microstructure of Ti-7Al-2Zr-2Mo-2V with the AED values less than 40 J/mm2, but the effects occur with the AED values higher than the critical value. With the increasing of AED the HAZ size grows in quadratic function.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2002年第11期1049-1053,共5页
Chinese Journal of Lasers
基金
湖北省自然科学基金(2000J124)资助项目
