高温合金高速铣削表面形貌及组织研究

doi:CNKI:11-1929/V.20101228.1334.001

材料工程与机械制造

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高温合金高速铣削表面形貌及组织研究

杜随更¹, 汪志斌¹, 吕超², 巨江涛¹, 张静¹

1. 西北工业大学现代设计与集成制造技术教育部重点实验室, 陕西西安 710072;
2. 中国飞行试验研究院, 陕西西安 710089

收稿日期:2010-08-30 修回日期:2010-10-08 出版日期:2011-06-25 发布日期:2011-06-24
通讯作者: Tel.: 029-88495264 E-mail: fwcenter@nwpu.edu.cn E-mail:fwcenter@nwpu.edu.cn
作者简介:杜随更(1963- ) 男,博士, 教授,博士生导师。主要研究方向:航空宇航制造技术。 Tel: 029-88495264 E-mail: fwcenter@nwpu.edu.cn 汪志斌(1986- ) 男,硕士研究生。主要研究方向:装配与连接技术,材料抗疲劳加工。 E-mail: wang10310@126.com 吕超(1984- ) 男,硕士研究生。主要研究方向:装配与连接技术,构件表面抗疲劳。 E-mail: lvchao_24@126.com 巨江涛(1987- ) 男,博士研究生。主要研究方向:装配与连接技术。 E-mail: ju20051106@126.com 张静(1986- ) 女,硕士研究生。主要研究方向:装配与连接技术。 E-mail: zhang368jing@126.com
基金资助:
国家"973"计划(6138502)

Study on High-speed Milling Surface Microstructure of Superalloy

DU Suigeng¹, WANG Zhibin¹, LU Chao², JU Jiangtao¹, ZHANG Jing¹

1. The Key Laboratory of Contemporary Design and Integrated Manufacturing Technology, Ministry of Education, Northwestern Polytechnical University, Xi’an 710072, China;
2. China Flight Test Establishment, Xi’an 710089, China

Received:2010-08-30 Revised:2010-10-08 Online:2011-06-25 Published:2011-06-24

摘要/Abstract

摘要： 为研究高温合金GH4169高速铣削表面完整性,在测量铣削过程中切削力随时间及切削参数变化规律的基础上,分析了高温合金加工表面形貌及微观组织的演化规律。结果表明:在本试验参数范围内,切削力随着切削速度的增加先升高后降低;铣削表面粗糙度随着切削速度增加而下降,随每齿进给量的增加而增加;变质层主要出现在主切削刃形成的切削表面上,在副切削刃形成的切削表面上几乎观察不到变质层;变质层厚度随瞬时接触角变化,当瞬时接触角为120°时变质层厚度最大;变质层厚度随切削速度升高呈山峰状变化,端铣及侧铣变质层厚度最大时,对应的切削速度分别为75.4 m/min及150.7 m/min左右。分析认为垂直切削力是引起变质层厚度变化的主要力学因素,切削过程的热力耦合作用是影响变质层的根本原因。

关键词: 高温合金, 高速铣削, 表层组织, 表面完整性, 表面形貌

Abstract: In order to study the surface integrity of superalloy GH4169 under high-speed milling, the rules governing the cutting surface morphology and microstructure of the superalloy are analyzed on the basis of the measurments of the variation of milling forces with the changes of the processing parameters and time during high-speed milling. The results indicate that in the range of the experimental parameters, the forces have a trend of first rising and then falling, and that they reach the peak when the cutting speed of end milling is 75.4 m/min. The surface roughness decreases with increasing cutting speed, but increases with increasing feed. Under the conditions of the experiment, a metamorphic layer appears at the milling surface generated by the major cutting edge, but the layer is hardly observed at the surface generated by vice cutting edge. The thickness of the metamorphic layer changes as the contact angle changes, and the thickest metamorphic layer is observed where the contact angle is about 120°. The thickness of the metamorphic layer has a trend of first rise and then fall as the cutting speed increases. The thickest metamorphic layer of end milling appears when the cutting speed is about 75.4 m/min, which is about 150.7 m/min of side milling. It is suggested that the thrust force plays the main mechanical role of forming the metamorphic layer, and that the coupled thermo-mechanical action during high-speed milling is the basic cause that generates the metamorphic layer.

Key words: superalloys, high-speed milling, surface microstructure, surface integrity, surface morphology

中图分类号:

杜随更, 汪志斌, 吕超, 巨江涛, 张静. 高温合金高速铣削表面形貌及组织研究[J]. 航空学报, 2011, 32(6): 1156-1163.

DU Suigeng, WANG Zhibin, LU Chao, JU Jiangtao, ZHANG Jing. Study on High-speed Milling Surface Microstructure of Superalloy[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2011, 32(6): 1156-1163.

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E-mail：hkxb@buaa.edu.cn

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

高温合金高速铣削表面形貌及组织研究

Study on High-speed Milling Surface Microstructure of Superalloy

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