电磁纯铁退火工艺与温度
The DT4E pure iron was annealed at the temperatures of 800-1 000 ℃ for the holding time of 180-360 min. Then the effects of annealing process on the grain sizes， magnetic properties and tensile strength of the pure iron were studied and the optimum annealing process was determined. The results show that the grain size of the annealed pure iron increased with the increase of holding time， and first increased then decreased then increased with the increase of the temperature. With the increase of grain size， the magnetic induction of the pure iron increased while the coercivity and tensile strength decreased. The recommended annealing process was at 850 ℃ for 240-300 min.
数控走心机效率怎样
走心机--全称为走心式数控车床，磨光棒走心机主要加工轴类零件，1人可以看4台机床，11SMnPb30磨光棒，送料箱一次可以放10支左右的材料 ，12L14磨光棒，编号程序，磨光棒，架好磨光棒
刀具后可以全自动加工，操作工只需要抽查尺寸，吹吹磨光棒毛刺等就可以了也可称为主轴箱移动型数控自动车床、经济型车铣复合机床或者纵切车床。属于精密加工设备，可同时一次完成车﹑铣﹑钻﹑磨光棒镗﹑攻、雕刻等复合加工，1215磨光棒，主要用于精密五金、轴类磨光棒异型非标件的批量加工。退火处理工艺流程 ：
退火处理(Annealing )，主要是指将材料曝露于高温一段很长时间后，然后再慢慢冷却的热处理制程。主要目的是释放应力、增加材料延展性和韧性、产生特殊显微结构等。
目的1
释放应力
目的2
增加材料延展性和韧性
目的3
产生特殊显微结构：
退火工艺包括完全退火、球化退火、等温退火、石墨退火、扩散退火、去应力退火、不完全退火、焊后退火等。
