前言我厂矿井卷扬机减速器的齿轮轴以往均采用40Cr,该钢不仅不适合我国缺铬少镍的资源,而且在实际调查中发现,由于该钢淬透性低,在齿面上往往发现较多的游离铁素体,齿面硬度低,大小齿轮配合时硬度差小,从 Preface Our mine shaft hoist reducer gear shaft used to be 40Cr, the steel is not suitable for our lack of chromium-less nickel resources, and in the actual survey found that due to the low hardenability of the steel, the tooth surface is often found to be more More free ferrite, tooth surface hardness is low, the size of the gear with a small hardness difference, from