电塑性加工对17-6Mn冷拔不锈钢丝的拔制应力和性能的影响

为使电塑性效应推广到生产应用 ,研究了奥氏体不锈钢 17- 6 Mn在变速拔丝时的电塑性效应。实验中对 17-6 Mn的拔丝速度从 9m/ min逐渐提高到 6 0 m/ m in,此速度与生产中的粗丝的拔丝速度相近。实验发现 :高能脉冲电流的引入使拔制应力降低 ,并使材料的塑性提高 ;但是电塑性效应随拔丝速度的提高而逐渐减弱。对 17- 6 Mn钢丝的磁学性能的测量表明 :脉冲电流的引入使饱和磁感应强度 Bs和剩磁 Br明显降低。这表明 ,电脉冲的引入对于材料塑性中的形变诱发相变有较大的抑制作用。

Effect of current pulses on the drawing stress and properties of 17-6Mn alloy in cold-drawing process

The introduction of current pulses (approximately 10 3 A/mm 2) to the wire during the drawing of 17 6Mn alloyed wire significantly decreased the drawing stress. The effect is known as electroplasticity. In this experiment, the wire drawing velocity for an austenitic stainless steel wire 1Cr18Ni9 was increased from 9m/min to about 60m/min which is the actual wire drawing velocity used in production with similar effects. Furthermore, for 17 6Mn wire, the saturated magnetization B s and the residual magnetization B r both decreased with the application of the current pulses. The tests showed that with increased drawing speed, the decrease of the drawing stress was diminished in accord with the magnetic property data.