时效硬度 meaning in Chinese

age hardness
ageing hardness

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。