Annealed condition: heat to 830 °C followed by slow cooling.& R& E, m- N+ D2 H+ Q! ]. t$ i
退火:加热到830℃,缓慢冷却。( U$ D' R+ ^! P3 t
- Brinell Hardness: 170 - Z. `1 }( T t" C3 p0 f• Oil quench from 980 °C.(或空冷) Temper at 690 °C. 3 N: h9 q- A' p! G9 p: D油淬980℃,回火690℃