时效: 1.(在一定时间内能起的作用)effectiveness for a given period of time2.[法律] prescription3.[冶金学] ageing; aging◇时效规则 limitation rules; 时效期限 length of limitation period; limitation period; 时效中断 interruptio
The time taken to reach maximum hardness decreased and the corresponding maximum hardness decreased with increasing aging temperature . the better properties of al - mg - si - mn - cr alloy were obtained after 8h at 175 ' c . the al - mg - si - mn - cr alloy resembles al - mg - si alloy in the way of the age hardening mechanism 在同一温度下,随着时效时间的延长,合金硬度逐渐上升,在达到时效硬度峰值后又逐渐降低,随着时效温度的升高,中南大学硕士学位论文川mg st mn cr合金组织与性能的研究合金达到时效硬度峰值的时间缩短,而相应的时效硬度峰值在减小。