Some Metallurgical Observations of Adiabatic Shear Phenomenon During High Speed Machining AISI 1045 Hardened Steel

2011 ◽  
Vol 4 (6) ◽  
pp. 2493-2497 ◽  
Author(s):  
Chunzheng Duan ◽  
Haiyang Yu ◽  
Honghua Li ◽  
Minjie Wang
Keyword(s):  
High Speed ◽  
Hardened Steel ◽  
Adiabatic Shear ◽  
High Speed Machining ◽  
Aisi 1045

Finite Element Simulation and Experiment of Chip Formation during High Speed Cutting of Hardened Steel

2010 ◽  
Vol 29-32 ◽  
pp. 1838-1843 ◽  
Author(s):  
Chun Zheng Duan ◽  
Hai Yang Yu ◽  
Yu Jun Cai ◽  
Yuan Yuan Li
Keyword(s):  
Finite Element ◽  
Cutting Force ◽  
High Speed ◽  
Chip Morphology ◽  
Hardened Steel ◽  
High Speed Machining ◽  
Serrated Chip ◽  
High Speed Cutting ◽  
Element Simulation ◽  
Aisi 1045

As an advanced manufacturing technology which has been developed rapidly in recent years, high speed machining is widely applied in many industries. The chip formation during high speed machining is a complicated material deformation and removing process. In research area of high speed machining, the prediction of chip morphology is a hot and difficult topic. A finite element method based on the software ABAOUS which involves Johnson-Cook material model and fracture criterion was used to simulate the serrated chip morphology and cutting force during high speed cutting of AISI 1045 hardened steel. The serrated chip morphology and cutting force were observed and measured by high speed cutting experiment of AISI 1045 hardened steel. The effects of rake angle on cutting force, sawtooth degree and space between sawteeth were discussed. The investigation indicates that the simulation results are consistent with the experiments and this finite element simulation method presented can be used to predict the chip morphology and cutting force accurately during high speed cutting of hardened steel.

Microscopic Observation of White Band within Shear Zone of Chip Produced during High Speed Machining of AISI 1045 Hardness Steel

2011 ◽  
Vol 474-476 ◽  
pp. 1292-1295
Author(s):  
Chun Zheng Duan ◽  
Wei Sen Kong ◽  
Zhao Xi Wang ◽  
Min Jie Wang
Keyword(s):  
Deformation Zone ◽  
High Speed ◽  
Chemical Elements ◽  
Adiabatic Shear ◽  
High Speed Machining ◽  
X Ray Diffraction ◽  
Serrated Chip ◽  
White Band ◽  
Aisi 1045 ◽  
Serrated Chips

To study the microstructure of white band is helpful for revealing formation mechanism of serrated chip. This paper investigates the microstructural characteristics of white bandsat primary and second deformation zone within the serrated chips produced during High Speed Machining (HSM) of AISI 1045 hardened steel usingoptical microscope, SEM, TEM, and electron microprobe, X-Ray diffraction. It was found that the white bands within primary and second deformation zone consist of small equiaxed grains which formed due to dynamic recrystallization during adiabatic shear, however, martensitic transformation just only taken place within the white band in second deformation zone. The re-distribution of chemical elements between the composition phases occurred due to the combined effect of adiabatic temperature rise and high speed deformation in formation process of white band. The former is result from adiabatic shear in primary deformation zone during formation of chip, while the latter is caused by the intense shear and friction between tool and chip.

Numerical Simulation of Adiabatic Shear Behavior in High-Speed Machining of Hardened Steel GCr15

2009 ◽  
Vol 69-70 ◽  
pp. 476-479
Author(s):  
Tao Chen ◽  
Xian Li Liu ◽  
G.T. Luo ◽  
Fu Gang Yan ◽  
Dong Kai Jia
Keyword(s):  
Shear Band ◽  
Cutting Force ◽  
High Speed ◽  
Numerical Range ◽  
Adiabatic Shear Band ◽  
Large Strain ◽  
Shear Behavior ◽  
Hardened Steel ◽  
Adiabatic Shear ◽  
High Speed Machining

In this paper, FEM is used to simulate the three stages of catastrophic shear occurrence, expansion and shear band formation when serrated chips are formed under adiabatic shear behavior in high-speed machining of hardened steel GCr15 with PCBN tool. By comparing data of simulation and experiment on chip morphology characters, it is indicated that they are in good accordance. Hereby, the author has analyzed strain and temperature distribution in adiabatic shear band, and dynamic characters of cutting force . The research results show that adiabatic shear band begins from tool tip and extends to workpiece free surface, and it is characterized by large strain and high temperature. In addition, it results from adiabatic shear behavior that cutting force waves regularly in a numerical range.

An Investigation into the Microstructure of Adiabatic Shear Banding in AISI 1045 Hardened Steel due to High Speed Machining

2010 ◽  
Vol 154-155 ◽  
pp. 321-324 ◽  
Author(s):  
Chun Zheng Duan ◽  
Liang Chi Zhang ◽  
Hai Yang Yu ◽  
Min Jie Wang
Keyword(s):  
High Speed ◽  
Shear Banding ◽  
Shear Bands ◽  
Adiabatic Shear ◽  
High Speed Machining ◽  
Adiabatic Shear Bands ◽  
Adiabatic Shear Banding ◽  
Aisi 1045 ◽  
Cutting Speeds ◽  
Electronic Microscope

Adiabatic shear banding during high speed machining is important to understand material removal mechanisms. This paper investigates the microstructure of adiabatic shear bands (ASBs) in the serrated chips produced during the high speed machining of AISI 1045 hardened steel. Optical microscope, scanning electronic microscope(SEM) and transmission electronic microscope(TEM) were used to explore the microstructural characteristics. It was found that there are two types of adiabatic shear bands. One is the deformed adiabatic shear band composed of a significantly deformed structure generated in a range of low cutting speeds, and the other is the transformed adiabatic shear band composed of very small equiaxed grains generated under high cutting speeds. The results indicated that the deformed band has a tempered martensite structure that formed through large plastic deformation and the transformed band has experienced a dynamic recrystallization process.

Research on High-Speed Cutting of Cr12MoV Hardened Steel - A Review

2020 ◽  
Vol 15 ◽  
Author(s):  
Fei Sun ◽  
Guohe Li ◽  
Qi Zhang ◽  
Meng Liu
Keyword(s):  
High Speed ◽  
Cutting Temperature ◽  
High Hardness ◽  
High Strength ◽  
Hardened Steel ◽  
Parameters Optimization ◽  
Future Research ◽  
High Speed Machining ◽  
Machined Surface ◽  
Stamping Die

: Cr12MoV hardened steel is widely used in the manufacturing of stamping die because of its high strength, high hardness, and good wear resistance. As a kind of mainstream cutting technology, high-speed machining has been applied in the machining of Cr12MoV hardened steel. Based on the review of a large number of literature, the development of high-speed machining of Cr12MoV hardened steel was summarized, including the research status of the saw-tooth chip, cutting force, cutting temperature, tool wear, machined surface quality, and parameters optimization. The problems that exist in the current research were discussed and the directions of future research were pointed out. It can promote the development of high-speed machining of Cr12MoV hardened steel.

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