Investigation on White Layer Formation in PCBN Hard Turning GCr15

被引：1

作者：

Qi, BaoYun ^{[1
]}

He, Ning ^{[1
]}

Li, Liang ^{[1
]}

Zhao, Wei ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Mech & Elect Engn, Nanjing 210016, Peoples R China

来源：

MACHINING AND ADVANCED MANUFACTURING TECHNOLOGY X | 2010年 / 431-432卷

关键词：

White layer; Phase transformation; Hard turning; Chip shapes; CHIP FORMATION;

D O I：

10.4028/www.scientific.net/KEM.431-432.241

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

It is commonly believed that the white layer formed during hard machining of steels is caused primarily by a thermally induced phase transformation resulting from rapid heating and quenching. The focus of this study is to investigate the white layers produced on the machined surfaces and on the inner side part of the chips in dry hard turning GCr15 with PCBN tools. Samples of machined workpiece and chips were metallographically processed and observed under a microscope to determine whether white layers were present or not. Some properties of white layers were deduced in order to verify some of the prevalent theories. More specifically, chip shapes were studied to determine how they developed during machining with potential appearance of white layers, with a view to correlating the chip shapes with the white layer formation.

引用

页码：241 / 244

页数：4

共 9 条

[1] Formation of white layers in steels by machining and their characteristics [J].

Akcan, S ;

Shah, S ;

Moylan, SP ;

Chhabra, PN ;

Chandrasekar, S ;

Yang, HTY .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2002, 33 (04) :1245-1254

[2] Chip formation, acoustic emission and surface white layers in hard machining [J].

Barry, J ;

Byrne, G .

CIRP ANNALS-MANUFACTURING TECHNOLOGY, 2002, 51 (01) :65-70

[3] TEM study on the surface white layer in two turned hardened steels [J].

Barry, J ;

Byrne, G .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 325 (1-2) :356-364

[4] White layers and thermal modeling of hard turned surfaces [J].

Chou, YK ;

Evans, CJ .

INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE, 1999, 39 (12) :1863-1881

[5] Some observations of the chip formation process and the white layer formation in high speed milling of hardened steel [J].

Ekinovic, S ;

Dolinsek, S ;

Jawahir, IS .

MACHINING SCIENCE AND TECHNOLOGY, 2004, 8 (02) :327-340

[6] A study of cutting forces and surface finish in high-speed machining of AISI H13 tool steel using carbide tools with TiAlN based coatings [J].

Mativenga, PT ;

Hon, KKB .

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE, 2003, 217 (02) :143-151

[7]

Tomlinson W. J., 1989, Surface Engineering, V5, P229

[8] The significance of the white layer in a hard turned steel chip [J].

Vyas, A ;

Shaw, MC .

MACHINING SCIENCE AND TECHNOLOGY, 2000, 4 (01) :169-175

[9]

Zhang L.M., 2004, THESIS DALIAN U TECH

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