Annealed condition: heat to 830 °C followed by slow cooling." A$ V ]9 s% f6 F
退火:加热到830℃,缓慢冷却。6 w+ V7 i2 K) P. L' a; T+ v, ^
- Brinell Hardness: 170, z5 d+ ]3 J; c- o0 V
• Oil quench from 980 °C.(或空冷) Temper at 690 °C.& |3 z) G' U* E
油淬980℃,回火690℃