本文基于实例,阐述了应用电子束在空气中对灰铸件进行重熔淬火的可能性。与电弧加热淬火相比,这种方法具有工作速度快、功率大(束功率可达60kw)、熔化迅速(几乎绝热)。工件处理简单,熔化深度大(熔化几微米至几毫米)和熔融易于控制、不产生裂纹、硬度高(可达HRC68以上)等特点。 Based on the examples, this article describes the possibility of electron beam remelting gray castings in the air. Compared with the arc quenching, this method has the advantages of fast working speed, high power (beam power up to 60kw), rapid melting (almost adiabatic). Workpiece handling is simple, the depth of melting (melting a few microns to a few millimeters) and easy to control melting, no cracks, high hardness (up to HRC68) and so on.