根据三乙胺硬化冷芯盒树脂砂的基本原理,设计了一种实验用硬化装置。该装置一次硬化树脂砂最大量为400 g（即6个标准∞字形工艺试样）,在保证硬化强度的前提下,三乙胺的消耗量仅为1~3 m L,从而实现了硬化装置的微型化,适用于实验教学及...根据三乙胺硬化冷芯盒树脂砂的基本原理,设计了一种实验用硬化装置。该装置一次硬化树脂砂最大量为400 g（即6个标准∞字形工艺试样）,在保证硬化强度的前提下,三乙胺的消耗量仅为1~3 m L,从而实现了硬化装置的微型化,适用于实验教学及相关科学研究。亦适用于生产过程中快速抽样检测树脂砂的硬化强度,做到预先修正和及时调整其吹胺压力及吹胺时间等参数。实验数据表明,在其他条件不变的情况下,利用该硬化装置硬化的冷芯盒树脂砂强度高;在强度不变的条件下,其吹胺压力低或吹胺时间短。展开更多
The quench sensitivity of 6063 alloy was investigated via constructing time-temperature-property（TTP） curves by interrupted quenching technique and transmission electron microscopy（TEM） analysis.The results show t...The quench sensitivity of 6063 alloy was investigated via constructing time-temperature-property（TTP） curves by interrupted quenching technique and transmission electron microscopy（TEM） analysis.The results show that the quench sensitivity of 6063 alloy is lower than that of 6061 or 6082 alloy,and the critical temperature ranges from 300 to 410℃ with the nose temperature of about 360℃.From TEM analysis,heterogeneous precipitate β-Mg2Si is prior to nucleate on the（AlxFeySiz） dispersoids in the critical temperature range,and grows up most rapidly at the nose temperature of 360℃.The heterogeneous precipitation leads to a low concentration of solute,which consequently reduces the amount of the strengthening phase β＇＇ after aging.In the large-scale industrial production of 6063 alloy,the cooling rate during quenching should be enhanced as high as possible in the quenching sensitive temperature range（410-300℃） to suppress the heterogeneous precipitation to get optimal mechanical properties,and it should be slowed down properly from the solution temperature to 410℃ and below 300℃ to reduce the residual stress.展开更多
文摘根据三乙胺硬化冷芯盒树脂砂的基本原理,设计了一种实验用硬化装置。该装置一次硬化树脂砂最大量为400 g（即6个标准∞字形工艺试样）,在保证硬化强度的前提下,三乙胺的消耗量仅为1~3 m L,从而实现了硬化装置的微型化,适用于实验教学及相关科学研究。亦适用于生产过程中快速抽样检测树脂砂的硬化强度,做到预先修正和及时调整其吹胺压力及吹胺时间等参数。实验数据表明,在其他条件不变的情况下,利用该硬化装置硬化的冷芯盒树脂砂强度高;在强度不变的条件下,其吹胺压力低或吹胺时间短。
文摘The quench sensitivity of 6063 alloy was investigated via constructing time-temperature-property（TTP） curves by interrupted quenching technique and transmission electron microscopy（TEM） analysis.The results show that the quench sensitivity of 6063 alloy is lower than that of 6061 or 6082 alloy,and the critical temperature ranges from 300 to 410℃ with the nose temperature of about 360℃.From TEM analysis,heterogeneous precipitate β-Mg2Si is prior to nucleate on the（AlxFeySiz） dispersoids in the critical temperature range,and grows up most rapidly at the nose temperature of 360℃.The heterogeneous precipitation leads to a low concentration of solute,which consequently reduces the amount of the strengthening phase β＇＇ after aging.In the large-scale industrial production of 6063 alloy,the cooling rate during quenching should be enhanced as high as possible in the quenching sensitive temperature range（410-300℃） to suppress the heterogeneous precipitation to get optimal mechanical properties,and it should be slowed down properly from the solution temperature to 410℃ and below 300℃ to reduce the residual stress.
