时效钢 meaning in Chinese

aged steel
ageing steel
aging steel

The grain refining process for 18ni 2450mpa martensite aged steel
马氏体时效钢细化晶粒工艺
Strain - aged steel
应变时效钢
Non - aging steel
无时效钢
1800mpa : specification for 18 % nickel - cobalt - molybdenum maraging steel forging stock , forgings , bars and parts 1800 mpa : double vaccuum melted
锻坯锻件棒材和零件用18 %镍-钴-钼马氏体时效钢