关键词: 马氏体时效钢00Ni14Cr3Mo3Ti, 同溶处理, 奥氏体晶粒, 力学性能

Abstract: Structure and mechanical properties of maraging steel 00Ni14Cr3Mo3Ti (% ： 0. 002C, 14. 06Ni, 3. 19Cr, 3. 06Mo, 1. 32Ti) with 750 ~ 1 050 °C solution treatment have been studied. Results showed that with ≤900 °C solution treatment the austenite grain size and strength of steel wasn't obvious change, as solution temperature was more than 900 °C , with increasing temperature the austenite grain size increased appreciably and the strength of steel presented declining trend. As solution temperature increased from 750 °C to 900 °C , with decreasing Fe₂Mo phase amount in steel and completely dissolving at 810 °C , the impact energy of the steel increased from 32 J to 61 J, and as solution temperature increased from 900 °C to 1 050 °C , with austenite grain coarsening the impact energy decreased from 61 J to 26 J.