【作者】 石增敏； 郑勇； 游敏； 丰平； 刘文俊；

【Author】 SHI Zeng-min~1 ZHENG Yong~2 YOU Min~1 FENG Ping~1 LIU Wen-jun~1 1.College of Mechanical and Material Engineering,China Three Gorges University,Yichang 443002,China; 2.College of Materials Sciences and Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

【机构】 三峡大学机械与材料学院； 南京航空航天大学材料与科学技术学院；

【摘要】 利用真空烧结工艺和表面氮化处理工艺,制备了纳米复合 Ti(C,N)基金属陶瓷可转位刀片和功能梯度 Ti(C,N)基金属陶瓷可转位刀片,详细研究了氮化处理对自制金属陶瓷刀具磨损形态和机理的影响．结果表明：自制刀片氮化处理前后的磨损形态有较大不同,显示了氮化处理后,刀片表面硬度的提高和表面层合金元素的变化,使得刀片的磨损机理和切削性能发生较大变化．氮化处理刀片切削正火态45~#钢、铸铁和奥氏体不锈钢时表现出较优的耐磨性．更多还原

【Abstract】 Nano-composite Ti(C,N)-based cermet indexable inserts and functionally gradient Ti(C,N)-based cermet indexable inserts were produced separately by vacuum sintering and surface heat-treatment with hot isostatic pressing (HIP) in nitrogen.The effect to wear morphological and mechanism of the newly fabricated cermet tools by the heat-treatment in nitrogen were investigated in detail.It was found that wear morphological of cermet tools changed after heat-treatment in nitrogen,which was due to the surface hardness being increased and the alternation of the elements in the surface layer.Comparing to the nano-composite Ti(C,N)-based cermet indexable inserts,the functionally gradient Ti(C,N)-based cermet indexable inserts exhibited a higher wear resistant for turning normalized medium carbon steel, quenched medium carbon steel and austenite stainless steel.更多还原