大模数齿轮平行于磨削方向磨齿裂纹原因分析  

Analysis of Grinding Crack of Paralleling to the Grinding Diretion for Large Module Gear

作　　者：李钊刚[1] 

机构地区：[1]宝钢集团苏州冶金机械厂,江苏苏州215151

出　　处：《机械传动》2010年第12期40-43,47,共5页Journal of Mechanical Transmission

摘　　要：根据磨齿裂纹的形态,判断出两类不同形态的裂纹源于截然不同的机理;找出大模数渗碳淬火齿轮齿面产生的和磨削方向平行的条数少、长而深的磨齿裂纹是由齿面上的巨大拉应力引起的。通过对渗碳淬火齿轮齿面产生残余应力的机理分析,证明齿面产生残余拉应力的可能性是存在的。齿面拉应力的存在可以较完满地解释产生所提磨齿裂纹的各种现象。最有效的预防措施是通过提高淬火油温控制心部表层马氏体转变的顺序,阻止表层在心部组织转变前产生转变,以保证最终在齿面形成残余压应力。According to the forms of grinding cracking,the two kinds of cracking originating from totally different mechanism is judged.The grinding cracking on the tooth flank of carburizing and quenching gear of large module and paralleling to the grinding direction,less counts,long and deep causing by great tensile stress on the tooth flank is found.The possibility of residual tensile stress can be created on the tooth flank is confirmed by the mechanism analysis of the creating residual stress of carburizing and quenching gear.All kinds of the phenomenon presenting in this paper can be explained due to the existence of tooth flank tensile stress.It is a most effective preventive measure that the transformation sequence of austenite to martensite in the core and the case is controlled by a higher quenching oil temperature,to stop the transformation of the case before the transformation of the core and to ensure producing residual compressive stress in the case.

关 键 词：大模数齿轮 磨削裂纹 拉应力 平行 

分 类 号：TG616[金属学及工艺—金属切削加工及机床]