高温合金锯齿形切屑绝热剪切带内材料组织演变及形成机理

为了研究不同铣削条件下切屑的宏观形态,设计了高速铣削单因素试验。通过单因素试验考察了各个铣削参数对铣削力的影响,并对改变铣削速度后得到的切屑的宏观形态进行了分析。对铣削加工中得到的切屑进行镶嵌、抛光、腐蚀,得到其金相显微组织照片,使用Digimizer测量软件对切屑形态各参数进行测量,研究了铣削速度对锯齿化程度和锯齿齿距的影响。通过得到的金相组织照片,对不同铣削参数下的切屑基体和绝热剪切带内材料的组织变化进行分析,得出了锯齿形切屑的形成机理。

Processing of Super-Alloy Serrated Chip Organization Evolution and Formation Mechanism of Adiabatic Shear Band Material

In order to study the macromorphology of the chip under different milling conditions,high speed milling of single factor experiment was designed.The milling parameters were obtained by single factor experiment on the influence of milling force,and the chip macro morphology from the change of milling speed was analyzed.Milling for chip after milling was inlayed,polished and corroded and obtained the metallographic microstructure pictures,and the chip morphology parameters were measured by using Digimizer software.The influence of milling speed was researched on the sawtooth degree and the sawtooth pitch.Through the microstructure pictures,the chip substrate and the organization change of adiabatic shear band material under different milling parameters were analyzed,and obtained the formation mechanism of serrated chip.