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金属表面快速硬化处理工艺也称“氧氮化”法,俗称“ON”法,是把两种常用化学热处理工艺:蒸汽发蓝和加氧氮化工艺结合起来,形成一种氧氮共渗新工艺。机加工后的合格零件,如齿轮、轴、离合器、凸轮靠模等,或工、夹、量、模具、刀具等,经“ON”法工艺处理后,不仅可以提高表面硬度,增加耐磨性、抗咬合性和疲劳强度,而且不改变被处理零件的精度和表面粗糙度,并具有光亮的耐蚀表面。一、“ON”法的基本机理 (1)将调质处理和机加工后的合格零件或淬火后的成品刀具,放在密封炉罐中加热,在400℃保温期间,通入氨气,使炉罐充满浓厚的氨气。当炉温升高至510～520℃时,氨气便在炉罐中进行热分解,其反应式是: 2NH_3 3H_2+2[N]
Metal surface rapid hardening process, also known as “oxynitridation” method, commonly known as “ON” method, is the two common chemical heat treatment process: steam blue and oxygen combined nitriding process to form a new oxynitriding Process. Machined qualified parts, such as gears, shafts, clutches, cam abutment, etc., or workers, folders, the amount of molds, knives, the “ON” method of processing, not only can improve the surface hardness and increase wear resistance , Anti-seizure and fatigue strength, and does not change the accuracy and surface roughness of the parts being processed, and has a bright corrosion resistant surface. First, the “ON” method of the basic mechanism (1) the quenched and tempered and machined parts or after quenching the finished tool, placed in a sealed furnace heat, at 400 ℃ during the heat, ammonia gas through Furnace tank filled with strong ammonia. When the temperature rises to 510 ~ 520 ℃, the ammonia gas is thermally decomposed in the furnace. The reaction equation is: 2NH_3 3H_2 + 2 [N]