Chip formation mechanism in dry hard high-speed orthogonal turning of hardened AISI D2 tool steel with different hardness levels

doi:10.1007/s00170-017-0667-5

IR > 机电工程学院

	Chip formation mechanism in dry hard high-speed orthogonal turning of hardened AISI D2 tool steel with different hardness levels
	Tang, Linhu 1,2,3; Yin, Jun 4; Sun, Yongji 1,2,3; Shen, Hao4 ; Gao, Chengxiu 1,2,3
	2017-11
发表期刊	INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
ISSN	0268-3768
卷号	93 期号:5-8 页码:2341-2356
摘要	Serrated chip formed in dry hard turning is considered one of the major chip types. In this paper, the main objective was to understand how the crack initiation and propagation, and thermo-plastic instability and pressure from force contribute to the formation mechanism of serrated chip in dry hard high-speed orthogonal turning (DHHOT) of the hardened steel with different hardness levels at cutting speed with 50, 450, and 850 m/min. The influences of the cutting speeds (50, 450, and 850 m/min) and workpiece hardness (40, 45, 50, 55, and 60 +/- 1 Rockweel hardness (HRC)) on chip morphology, segment spacing, degree of segmentation, chip deformation coefficient, shear angle, and chip segmentation frequency also were experimentally investigated. Experimental results showed that the very high strain in the shear band does give rise to the high temperature in higher hardness material and at higher cutting speed and this makes the high-speed slip of the shear band much easier happen along existing micro-crack. The critical chip is produced at a cutting speed of 50 m/min and a hardness level of 50 +/- 1 HRC. The strain rate increases with the increments of the cutting speed, which increases brittleness, and thus induces acceleration of the crack propagation speed in shear band. Moreover, the increments of the quenching hardness can increase the brittleness of the workpiece and thus lead to the large damage in shear band. The microstructure of the material within the bottom of chip showed that the elongated grains do appear due to thermo-mechanical effect between the chip back and the rake face of the cutting tool.
关键词	Serrated chip Formation mechanism Crack Thermo-plastic instability Hardness Cutting speed
DOI	10.1007/s00170-017-0667-5
收录类别	SCI ; SCIE
语种	英语
资助项目	National Natural Science Foundation of China[51465028]
WOS研究方向	Automation & Control Systems ; Engineering
WOS类目	Automation & Control Systems ; Engineering, Manufacturing
WOS记录号	WOS:000412953600070
出版者	SPRINGER LONDON LTD
EI入藏号	20172703886628
EI主题词	Speed
EI分类号	537.1 Heat Treatment Processes - 545.3 Steel - 603.2 Machine Tool Accessories - 931.1 Mechanics - 951 Materials Science
引用统计	被引频次：25[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/33034
专题	机电工程学院
通讯作者	Tang, Linhu
作者单位	1.Lanzhou Inst Technol, Prov Key Lab Green Cutting Technol & Applicat Gan, Lanzhou, Gansu, Peoples R China; 2.Lanzhou Inst Technol, Coll Mechanoelect, Lanzhou, Gansu, Peoples R China; 3.1 Gongjiaping East Rd, Lanzhou 730050, Gansu, Peoples R China; 4.Lanzhou Univ Technol, Coll Mechanoelect, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Tang, Linhu,Yin, Jun,Sun, Yongji,et al. Chip formation mechanism in dry hard high-speed orthogonal turning of hardened AISI D2 tool steel with different hardness levels[J]. INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY,2017,93(5-8):2341-2356.
APA	Tang, Linhu,Yin, Jun,Sun, Yongji,Shen, Hao,&Gao, Chengxiu.(2017).Chip formation mechanism in dry hard high-speed orthogonal turning of hardened AISI D2 tool steel with different hardness levels.INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY,93(5-8),2341-2356.
MLA	Tang, Linhu,et al."Chip formation mechanism in dry hard high-speed orthogonal turning of hardened AISI D2 tool steel with different hardness levels".INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY 93.5-8(2017):2341-2356.

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