GH4169镍基高温合金车削过程刀片磨损失效机理浅析  

Discussion of Blade Wear Failure Mechanism in Turning Process of GH4169 Nickel-based Superalloy

作　　者：刘超 Liu Chao(Xiamen Tungsten Co.,LTD Technology Center,Xiamen 361009,Fujian;China National R&D Center for Tungsten Technology,Xiamen 361009,Fujian)

机构地区：[1]厦门钨业股份有限公司技术中心/国家钨材料工程技术研究中心硬质材料研究所,福建厦门361009 [2]国家钨材料工程技术研究中心,福建厦门361009

出　　处：《福建冶金》2021年第3期22-26,共5页Fujian Metallurgy

摘　　要：由于镍基高温合金在切削加工过程中易发生切削温度高、刀片磨损大、加工硬化现象严重等问题,导致镍基高温合金非常难以加工。本文通过对常规的车削过程的微观观测与分析,研究了镍基高温合金在车削过程中刀片的磨损失效过程与机理,以期为其切削性能的改善提供支持。结果表明,在切削GH4169镍基高温合金时,车削刀片的磨损形式主要包括前刀面磨损、后刀面磨损、沟槽磨损以及刀尖磨损。上述磨损形式由粘结磨损、磨粒磨损和氧化磨损几种磨损机理相互作用和影响形成。其中,粘结磨损是刀片切削镍基高温合金过程中最主要的失效机制,是引起其它失效形式的源头。The cutting process is prone to problems such as high cutting temperature,large blade wear,and serious work hardening,nickel-based superalloys is very difficult to process.In order to provide support for the improvement of nickel-based superalloys machinability.In this paper,through the microscopic observation and analysis of the conventional turning process,the process and mechanism of the blade wear failure of the nickel-based superalloy GH4169 in the turning process are studied.The results show that the wear forms of turning inserts mainly include rake face wear,flank wear,notch wear and nose wear.The above-mentioned wear forms are formed by the interaction and influence of several wear mechanisms such as adhesion wear,abrasive wear and oxidation wear.Among them,adhesion wear is the most important failure mechanism in the process of cutting nickel-based superalloys,and it is the source of other failure modes.

关 键 词：高温合金 车削 失效机理 

分 类 号：TG51[金属学及工艺—金属切削加工及机床]