七十年代初,在要求无公害、省能量前提下,出现了一种新的表面硬化处理方法——离子氮化法,这个方法在欧美虽然很早就开始研究,但鉴于真空炉的有关技术和大电流放电的稳定性等问题,直到1967年前后,才由西德的Klǒckner公司生产离子 In the early seventies, in the request of pollution-free, energy-saving premise, there has been a new method of surface hardening - ion nitriding, this method in Europe and the United States although very early began to study, but in view of the vacuum furnace technology And the stability of large current discharge and other issues, until 1967 before the West Germany Klǒckner production of ions