涂层刀具高速切削GH2132铁基高温合金加工表面变质层研究  

Machined Surface Metamorphic Layer in High-speed Cutting of Iron Base Superalloy GH2132 with Coated Tool

作　　者：姜秀丽 楚满福 韩增颂 尹亮 郑光明[3] Jiang Xiuli;Chu Manfu;Han Zengsong;Yin Liang;Zheng Guangming(Shandong Provincial Institute of Mechanical Design,Jinan 250031,China;不详)

机构地区：[1]山东省机械设计研究院 [2]歌尔股份有限公司 [3]山东理工大学机械工程学院 [4]山东中车同力达智能装备有限公司

出　　处：《工具技术》2023年第11期25-29,共5页Tool Engineering

基　　金：国家自然科学基金(51505264);山东省自然科学基金(ZR2020ME156)。

摘　　要：加工表面变质层结构对零件使用性能起到重要作用,采用TiN/TiCN/TiAlN涂层硬质合金刀具对GH2132铁基高温合金进行高速切削试验,分析其加工表面变质层结构特征及形成机理。结果表明:经过涂层刀具高速加工的GH2132铁基高温合金表面变质层由白层和暗层组成,随着切削参数增加,加工表面塑性变形增大,晶粒细化,致使白层厚度增大;在加工表面微观结构电子背散射衍射(EBSD)分析中发现孪晶的存在,随着切削速度的提高,孪晶的数量增加,诱导材料组织发生相变,材料组织在转化过程中晶粒被拉长,促进塑性变形,从而引起加工表面组织再结晶。The machined surface metamorphic layer has an important role on the service performance of the parts.In order to investigate the characteristics and formation mechanism of the machined surface metamorphic layer,the high-speed milling experiment of iron-based superalloy GH2132 is carried out by TiN/TiCN/TiAlN coated cemented carbide tools.The results show that the machined surface metamorphic layer of iron base superalloy GH2132 is composed of white layer and dark layer.Due to the improvement of plastic deformation and the grain refinement,with the increase of cutting parameters,the white layer thickness is enhanced.In addition,the existence of crystal twins is found in the microstructure of the machined surface observed by the electron backscatter diffraction(EBSD).With the increase of cutting speed,the crystal twin tends to increase,which can promote the phase transformation.During the phase transformation process,the grain is elongated,which promotes the plastic deformation.Thus,the recrystallization of the machined surface structure is caused.

关 键 词：变质层 涂层刀具 高温合金 白层 孪晶 

分 类 号：TG132.3[一般工业技术—材料科学与工程] TG506[金属学及工艺—合金] TH162.1[金属学及工艺—金属学]