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利用我们自行研制的高效、中场强的脉冲磁场热处理设备对 W_6Mo_3Cr_4V_2常用高速钢的磁场回火进行系统地研究,发现电磁脉冲磁场可使高速钢的回火次数和回火周期显著减少,组织和性能得到改善.进而优选出最佳脉冲磁场回火工艺为560℃×45分×2次.采用此工艺可使高速钢工具的硬度,红硬性,抗弯强度和冲击韧性较常规560℃×1h×3—4次回火的工具有不同程度的提高.经实际生产考核,可使高速钢制中心钻,小丝锥和冲模寿命提高40%～140%.
The magnetic field tempering of W_6Mo_3Cr_4V_2 common high-speed steel was systematically studied by using the self-developed high-efficiency mid-field pulsed magnetic field heat treatment equipment. It was found that the electromagnetic pulse magnetic field can significantly reduce the tempering times and tempering cycles of high- The performance is improved.And then the best pulse magnetic field tempering process is the best 560 ℃ × 45 minutes × 2 times.The hardness, red hardness, flexural strength and impact toughness of high speed steel tool can be compared with conventional 560 ℃ × 1h × 3-4 times tempering tools have different levels of improvement.After the actual production assessment, high-speed steel center drill, small tap and die life increased by 40% to 140%.