Annealed condition: heat to 830 °C followed by slow cooling.' |9 t* ~, Q* a6 O8 e
退火:加热到830℃,缓慢冷却。. ]# z$ h# W1 ^5 L% m5 r- a" o
- Brinell Hardness: 170. f# s( H! m, Y& f m0 u
• Oil quench from 980 °C.(或空冷) Temper at 690 °C. O( E5 z0 N p2 G% ^' \: D
油淬980℃,回火690℃