摘要
对铸态Al⁃Si⁃Mg⁃B⁃Sr合金进行了不同温度和不同保温时间的均匀化退火处理,采用显微组织观察、硬度测试、导电率测试等手段研究了不同均匀化退火工艺对Al⁃Si⁃Mg⁃B⁃Sr合金组织、硬度与导电率的影响。结果表明,铸态合金组织存在一定偏析现象。经过550℃×9 h均匀化退火的合金组织均匀,偏析基本消除。随着均匀化退火时间的延长,合金的硬度先升高后降低,导电率逐渐升高。550℃×9 h均匀化退火的Al⁃Si⁃Mg⁃B⁃Sr合金的硬度最高,为74.5 HV0.5;550℃×15 h均匀化退火的合金的导电率最高,达到55.9%IACS。
As⁃cast Al⁃Si⁃Mg⁃B⁃Sr alloy was homogenization annealed under different temperatures and holding time.The effects of different homogenization annealing processes on microstructure,hardness and conductivity of the Al⁃Si⁃Mg⁃B⁃Sr alloy were studied by means of microstructure observation,hardness test and conductivity test.The results show that the microstructure of as⁃cast alloy has certain segregation phenomenon.After homogenization annealing at 550℃for 9 h,the microstructure of the alloy is uniform and the segregation is basically eliminated.With the extension of homogenization annealing time,the hardness of the alloy increases first and then decreases,and the conductivity gradually increases.The hardness of the Al⁃Si⁃Mg⁃B⁃Sr alloy homogenization annealed at 550℃for 9 h is the highest,which is 74.5 HV0.5.The conductivity of the alloy homogenization annealed at 550℃for 15 h is the maximum,reaching 55.9%IACS.
作者
李东阳
李艳霞
Li Dongyang;Li Yanxia(College of Mechanical and Electrical Engineering,North China Institute of Aerospace Engineering,Langfang Hebei 065000,China;College of Materials Engineering,North China Institute of Aerospace Engineering,Langfang Hebei 065000,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2024年第2期199-203,共5页
Heat Treatment of Metals
基金
河北省高等学校科学技术研究项目(QN2016206)。
