丰田工业大学的斋藤长男教授等人应用电加工技术在碳钢表面形成碳化钨(WC) 的牢固被膜获得成功。它的原理是,用降低电加工电极热传导率的方法.利用电极自身消耗,将电极材料的粒子堆积在极板上. 这种电极是用WC粉末和Fe粉加压成形,为了提高其粘结强度,用WC·CO烧结电极对此进行再凝固处理,最后在混入WC粉的加工液中利用刀头电极进行电加工。这种方法的特点是,除了温度影响小、成份和尺寸精确外,还适应于各种复杂形状的涂层,并可以利用原有的电加工机床。利用电极消耗堆积粒子用等离子、电子、激光等方法形成被膜,设备成本昂贵,而且材料的被覆厚度受到限制。用一般的喷镀法将涂层增厚,却会出现剥离、变形和成份不均等问题。因此,斋藤教授等人把专门用于电加工的工艺 Professor Saito of Toyota University of Technology and others applied electroforming techniques to form a solid coating of tungsten carbide (WC) on the surface of carbon steel. Its principle is to reduce the thermal conductivity of the electrode processing method using the electrode itself consumption, the electrode material particles deposited on the plate. This electrode is used WC powder and Fe powder pressure forming, in order to improve its bonding Strength, using WC · CO sintered electrode to re-coagulation treatment, and finally mixed with WC powder processing fluid using the tip electrode for electrical processing. This method is characterized by its small temperature dependence, its precise composition and dimensions, its suitability for a wide range of complex shapes, and its ability to utilize existing electromechanical machines. The use of electrodes to accumulate particles deposited by plasma, electron, laser and other methods to form a film, the equipment is expensive, and the coating thickness of the material is limited. With the general method of coating thickening coating, but there will be peeling, deformation and composition of non-uniform problems. Therefore, Professor Saito and others dedicated to the electrical processing technology