摘要
分析了压痕—压平复合形变工艺特点及作用,定义了相关工艺参数,研制了AZ31镁合金板材压痕—压平复合形变模具装置,并进行了实验研究。分析了坯料温度、压下率等工艺参数对镁合金板材微观组织和力学性能的影响规律。结果表明:坯料温度为275℃时,压下率为29%,模具温度为150℃时,经过压痕—压平复合形变后,镁合金板材的微观组织和力学性能得到明显提高,其平均晶粒尺寸为7.84μm,屈服强度为212 MPa,抗拉强度为298 MPa,伸长率为17.2%,显微硬度为91.99 HV。复合形变后的镁合金性能与平棍轧制工艺相比,晶粒尺寸细化了23%,屈服强度提高了5%,抗拉强度提高了15%,伸长率提高了4%,显微硬度提高了12%。
Characteristics of indentation-flatten compound deformation（IFCD） were analyzed and effect of deformation temperature and reduction ratio on microstructure and mechanical property of AZ31 magnesium alloy deformed by the IFCD was studied.The results show that the microstructure and mechanical property of the AZ31 magnesium alloy are significantly improved by the IFCD at the deformation temperature of 275 ℃,the reduction ratio of 29% and the tool temperature of 150 ℃.The average grain size of the alloy is7.84 μm,and the hardness reaches 91.99 HV,yield strength is 212 MPa,tensile strength is 298 MPa and the elongation ratio reaches17.2% for the alloy after the IFCD.Compared with that of the commercial rolling,the average grain size is reduced by 23%,and the yield strength,tensile strength,elongation ratio and hardness increase by 5%,5%,4% and 12%,respectively,for the AZ31 magnesium alloy after IFCD.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2016年第8期47-52,共6页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(51575366)
沈阳市科技计划(F14-231-1-32)
关键词
AZ31镁合金
复合形变
微观组织
力学性能
AZ31 magnesium alloy
compound deformation
microstructure
mechanical property
