高温合金GH80A铣削时表面完整性试验及研究  

Experimental and Research on Surface Integrity in Milling Superalloy GH80A

作　　者：张永盛 孙涛 梁军华 朱超 Zhang Yongsheng;Sun Tao;Liang Junhua;Zhu Chao(Sichuan Engineering Laboratory of High Temperature Alloy Cutting Technology,Deyang,Sichuan,618000,China)

机构地区：[1]四川省高温合金切削工艺技术工程实验室

出　　处：《装备制造与教育》2019年第4期44-49,65,共7页Equipment Manufacturing and Education

摘　　要：高温合金GH80A是一种常用的航空航天、燃气轮机叶片材料,在650℃到850℃温度区间具有较好的抗氧化与抗蠕变性能。然而,这种材料在加工时塑性变形严重,对于刀具的磨损较大,导致表面粗糙度、残余应力等表面完整性指标不理想。以切削速度Vc为变量设计单因素试验,研究试验时速度的四组水平对表面粗糙度、显微硬度、残余应力等指标的影响情况,分析高温合金表层氧氮氢含量的变化趋势和规律。对试验结果进行分析,以期为优化切削工艺参数、提升高温合金加工表面完整性提供有益的参考。GH80A superalloy is a kind of widely-used blade materials in aerospace and gas turbine components,which has excellent creep resistance and oxidation resistance performance during the temperature range between 650℃and 850℃.However,during the cutting process,material undergoes severe plastic deformation and thus results in great tool wear.This situation leads to indexes like bad surface roughness,unsatisfactory residual stress.Using cutting speed to design a single-factor experiment,the influence of different velocities on surface roughness,micro-hardness,residual stress is researched and the changing trend of content of oxygen,nitrogen and hydrogen is analyzed.Integrating the experimental result and analytical conclusion,optimum process parameters are expected to provide good reference in improving surface integrity.

关 键 词：高温合金 表面完整性 氧氮氢含量 

分 类 号：TG507.1[金属学及工艺—金属切削加工及机床]