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表面技术是提高工件防腐、耐磨性的有效方法,火焰喷涂因其设备简单而被广泛应用。但涂层孔洞多,原始颗粒间界及涂层与基材的结合界面强度不高等因素限制了其应用范围。利用金属或合金的超塑性,在超塑状态下,原子活性大,激活能又低,原子扩散速度非常快,可一次完成精密成形和固相扩散焊接,使零件在超塑成形的同时,基本焊合涂层孔洞,局部表面改性,提高工件(模具)表面性能,特别是提高其耐磨性。
Surface technology is to improve the corrosion resistance of the workpiece, an effective method of wear resistance, flame spraying because of its simple equipment and has been widely used. However, many holes in the coating, the original particle boundaries and the interface between the coating and the substrate strength is not high and other factors limit the scope of its application. The use of metal or alloy superplasticity in the super-plastic state, the atomic activity, activation energy is low, the atomic diffusion speed is very fast, can be a complete precision forming and solid-phase diffusion welding, the parts in the super-plastic forming, the basic Welding coating holes, local surface modification, improve the surface properties of the workpiece (mold), especially to improve its wear resistance.