Definitions
A. T74 - Solution treated and then artificially over-aged.
Ageing treatment shall be carried out within 7 days after the quench by heating at a temperature of 110
°C ± 3 °C for 8 hours minimum. Further aged without cooling at a temperature of 175 °C ± 3 °C for 8 to 16 hours, followed by aircooling.
FURTHER AGED is a continuation and extension for OVER-AGED . Therefore, FURTHER AGED can be translated into 接下来的时效,进一步的时效,再次时效 etc. 本帖最后由 陆丰 于 2009-12-4 07:43 编辑