Abstract: Through experiments,the production process of 16MnCrS5 steel bars for precision turning is determined,and the appropriate sulfur content,cooling speed and annealing temperature parameters are studied to meet the requirements of high-end automotive pin precision turning parts. The results show that the tested 16MnCrS5 steel hot-rolled bars with S content ranging from 0.028% to 0.035% were cooled at a cooling rate of 1.37 to 1.69 ℃/s,and then subjected to stress relief annealing at 620 ℃ for 6 h in a continuous annealing furnace,and the hardness was 180-215 HBW which met customer requirements of that for stress relief annealing precision turning bar.

Key words: 16MnCrS5 Steel, Precision Turning, Hardness, Sulfur Contents, Stress Relief Annealing

摘要： 通过试验确定精密车削用16MnCrS5棒材的生产工艺，研究合适的硫含量、冷却速度和退火温度参数，满足高端汽车销轴精密车削零件要求。结果表明，试验的S含量0.028%~0.035%的16MnCrS5热轧棒材以1.37~ 1.69℃/s冷却速度冷却后，再采用连续退火炉进行620℃×6h 的去应力退火，可得到硬度满足180～215HBW 的去应力退火精密车削用棒材。

关键词: 16MnCrS5钢, 精密车削, 硬度, 硫含量, 去应力退火