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Effect of coating material and lubricant on forming force and surface defects in wire drawing process

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Transactions of Nonferrous Metals Society of China 2011年第A1期21卷 104-110页

作者： S.M.BYON S.J.LEE D.W.LEE Y.H.LEE Y.LEE Department of Mechanical Engineering Dong-A University Department of Mechanical Engineering Chung-Ang University wire Rod Research Group POSCO Technical Research Laboratories

A pilot wire drawing machine as well as wire end-pointing roller was developed. Using these machines, a wire drawing test for four different coating materials and two different lubricants was performed as the reduction ratio increased from 10% to 30%. Materials used for a substrate in this study are plain carbon steel （AIS11045） and ultra low carbon bainite steel. To compute the friction coefficient between the coating layer of wire and the surface of die lbr a specific lubricant, a series of finite element analyses were carried out. SEM observations were also conducted to investigate the surface defects of wire deformed. Results show that the behavior of drawing force varies with the lubricant-type at the initial stage of drawing. The powder-typed lubricant with a large particle causes the retardation of lull lubrication on the entire contact surface and the local delamination of coating layer on the wire surface. As the flow stress of a substrate increases, the delamination becomes severe.

关键词： coating lubricant wire drawing delamination

Design and Experiment of the High Speed wire drawing with Ultrasound

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Chinese Journal of Mechanical Engineering 2009年第4期22卷 580-586页

作者： QI Haiqun SHAN Xiaobiao XIE Tao School of Meehatronics Engineering Harbin Institute of Technology Harbin 150001 China Department of Material and Chemical Engineering Heilongiiang Institute of Technology Harbin 150050 China

The previous experiments of wire drawing with ultrasonic vibration were mostly carried out on self-made machine or drawing test machine and the drawing speed didn＇t conform to practical production. In order to promote the practical application of the technology, the ultrasonic vibration system was designed and manufactured by using the classical dynamics method. The dynamic characteristic of the ultrasonic vibration system was analyzed. The performance parameters of the system were measured on the resistance analyzer. The oxygen-free brass wire drawing with ultrasonic vibration at the approximate speed of practice was carried out on the LH-200/17 drawing machine. By comparing the wire drawing through ultrasonic vibration and the conventional wire drawing, the experimental results show that the drawing process with ultrasound was steady at the high drawing speed of 1 126 mm/s, while the broken wire often occurs at the speed of 980 mm/s during the conventional wire drawing; the ultrasonic vibration reduced the drawing force by 7 %; and the ultrasound also reduced the uneven deformation of the wire and greatly improved the surface quality of the wire. The research results provide theoretical and experimental support for the practice and application of the wire drawing by ultrasonic vibration.

关键词： ultrasonic vibration wire drawing drawing experiment drawing force surface quality

Deformation bands in fully pearlitic steel during wire drawing

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Science China(Technological Sciences) 2014年第4期57卷 796-803页

作者： GUO Ning SONG Bo LUAN BaiFeng CHEN ZhiQian LIU Qing School of Materials Science and Engineering Southwest University School of Materials Science and Engineering Chongqing University

The deformation of fully pearlitic steels during wire drawing has been investigated for botb longitudinal section and transverse section by back-scattered electron imaging （BSEI）, electron back-scattered diffraction （EBSD）, and transmission electron mi- croscope （TEM）. The results show that a large number of deformation bands （DBs） composed of a mixture of kink-like bands and shear-like bands were observed both in the longitudinal section and the traverse section of the drawn wires. The formation of such bands involves two aspects： heterogeneous deformation in the scale of pearlite colonies and instability of fer- rite-cementite interfaces due to stress concentration during wire drawing. The development of suck bands in fully pearlitic steels dominates the formation of metallograpbic texture, reduces the pearlite interlamellar spacing and promotes the development of 〈 110〉 fiber crystalline texture of ferrite matrix during wire drawing.

关键词： pearlitic steel wire drawing deformation bands microstructure

Effect of drawing speed on microstructure distribution and drawability in twinning-induced plasticity steel during wire drawing

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Journal of Iron and Steel Research International 2020年第5期27卷 577-587页

作者： Joong-ki Hwang School of Mechanical Engineering Tongmyong UniversityBusan 48520Republic of Korea

The effect of drawing speed on temperature rise and microstructure distribution in twinning-induced plasticity(TWIP)steel during wire drawing has been investigated to improve drawability for wire rod *** wire drawing process is performed at room temperature,heat is generated due to the plastic deformation and friction at the wire-die *** steel wires subjected to the low drawing speed(LD)of 0.5 m/min and the high drawing speed(HD)of 5.0 m/min were analyzed using the numerical simulation and electron backscatter diffraction ***,the specimens subjected to the HD had a higher drawability by about 18%compared to the LD,which is totally different from the general behavior of plain carbon pearlitic *** LD wire had uniform temperature distribution along the radial direction during wire *** contrast,the HD wire had a temperature gradient along the radial direction due to the higher frictional effect at surface:the minimum temperature of 58℃ at center area and the maximum temperature of 143 C at surface *** higher stacking fault energy of HD wire at the surface area due to the high temperature rise retarded twinning rate,resulting in the prevention of fast exhaustion in ductility in comparison with the LD wires since the earlier depletion of twins at surface area is known as the main reason for the fracture of TWIP steel during wire ***,HD process delayed the fracture strain of wire and increased the uniformity of microstructure and mechanical properties along the radial direction.

关键词： Twinning-induced plasticity steel wire drawing Deformation twin drawing speed Temperature rise

Microstructure and texture evolution in fully pearlitic steel during wire drawing

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Science China(Technological Sciences) 2013年第5期56卷 1139-1146页

作者： GUO Ning LUAN BaiFeng WANG BingShu LIU Qing Department of Materials Science and Engineering Southwest University Department of Materials Science and Engineering Chongqing University Department of Materials Science and Engineering Fuzhou University

The evolution of morphology of pearlite and crystallographic texture of ferrite matrix in fully pearlitic steels during wire drawing were quantitatively investigated. The study revealed that a fiber structure of the pearlite morphology and a 〈110〉 fi- ber texture of the ferrite matrix begin to take shape and develop gradually with increasing strain. The growth rates of the fiber structure and the 〈110〉 texture are different in different regions within the wires with increasing drawing strain. There is a close relationship between the pearlite morphology and the crystalline texture during wire drawing. The pearlite interlamellar spacing （ILS） and thickness of cementite lamellae （To） decrease gradually both in longitudinal and transverse sections. The definition of pearlite colony should be reconsidered for describing microstructure of the wire drawing deformed pearlitic steels.

关键词： pearlitic steel wire drawing microstructure texture

EFFECTS OF HIGH-DENSITY CURRENT PULSES ON WORK HARDENING BEHAVIORS OF AUSTENITE STAINLESS STEEL IN wire-drawing DEFORMATION

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Acta Metallurgica Sinica(English Letters) 2001年第5期14卷 341-346页

作者： K.F. Yao, P. Yu, J. Wang, W. Fang and M.X. Zheng Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China Dept. of Mech. Eng. Tsinghua Univ. Beijing 100084 China

The influence of high-density pulsing current on the work-hardening behaviour of H0Cr17Ni6Mn3 and 1Cr18Ni9 stainless steels in wire-drawing deformation processes has been studied. It was found that the drawing stress and the work-hardening rate of wires were significantly reduced by applying current pulses in drawing process. The work-hardening behavior of the multi-courses drawing deformation can be well described by Hollomon formula σ=κΕn. With the application of current pulses in drawing deformation, the work-hardening exponents of H0Cr17Ni6Mn3 steel wires and 1Cr18Ni9 stainless steel wires were reduced by 33% and 45%, respectively, and their work-hardening coefficients were reduced by 41% and 47%, respectively. It was also found that the work-hardening coefficient of wires was reduced with the increment of the frequency of current pulses, while the work-hardening exponents of both steels were insensitive to the pulsing frequency.

关键词： Deformation Electric currents Pulsatile flow Strain hardening wire drawing

FEM Analysis of wire drawing and Drawn wire Properties

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FEM Analysis of Wire Drawing and Drawn Wire Properties

Advanced simulation of die wear caused by wire vibrations during wire-drawing process

第二届先进钢铁结构材料国际会议

作者： LI Shengli~1, WEN Shuwen~2(1. Anshan University of Science and Technology, Liaoning,Anshanl 14002 china 2. Swinden Technology Centre, Rotherham, UK)

＜正＞As a tool, Finite element methnod （FEM） has been extensively used for steel product development, manufacture and in-service performance analysis. This paper presents the recent development of an FE model for wire drawing and drawn wire property prediction. It is demonstrated that this model can be used to assist the development of rod steel grades that can meet the demands required by wire users for high ductility and strength.

关键词： wire drawing Property FE Analysis FEM

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Transactions of Nonferrous Metals Society of China 2012年第7期22卷 1723-1731页

作者： LEE Kyung-Hun LEE San g-Kon KIM Byung-Min Precision Manufacturing Systems Division Pusan National University30 Jangjeon-DongKumjeong-GuBusan 609-735Korea Daegyeong Regional Division Korea Institute of Industrial Technology711Hosan-dongDalseo-guDaegu 704-230Korea School of Mechanical Engineering Pusan National University30 Jangjeon-DongKumjeong-GuBusan 609-735Korea

An advanced simulation that considers the effect of wire vibrations was proposed for predicting accurately wear profiles of a die used in a wire-drawing *** effect of wire vibrations,the changes in the wear profiles,and the generation of ringing during die approach were investigated by this *** vibrations occurring between the die and the drum are governed by a partial differential equation called the wave equation,which is a function of the wire length,tension,density,and initial wire *** wire-drawing process was simulated by the commercial code Abaqus FEA,and the die wear profiles were predicted by Archard’s wear *** predicted profiles were compared with measured profiles of a worn drawing die after producing 5 t of AISI 1010 wire;the die was made of tungsten carbide with a Brinell hardness of HB *** profiles predicted by considering the effect of wire vibrations are in good agreement with the experimental data,indicating that the advanced simulation can be used to accurately predict the die wear profiles when ringing is observed during die approach.

关键词： wire drawing wire vibrations die wear profile ringing

Rectifying control of wire diameter during dieless drawing by a deformation measuring method of interframe displacement

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International Journal of Minerals,Metallurgy and Materials 2012年第7期19卷 615-621页

作者： Yong He Xue-feng Liu Fang Qin Jian-xin Xie Key Laboratory for Advanced Materials Processing (Ministry of Education) University of Science and Technology Beijing Beijing 100083 China

A deformation measurement method of interframe displacement was proposed in this paper. By online monitoring the shape di- mensions of both the deformation zone and its adjacent zone by machine vision, the initial and terminative positions of deformation were dynamically identified during dieless drawing, and the global monitoring and online closed-loop control of the deformation zone were achieved. The dieless drawing process was systematically carried out on NiTi shape memory alloy wires. It is shown that the deformation measurement method of interframe displacement can track the axial displacement of the wires, but this cannot be achieved by traditional machine vision. The initial and terminative positions of deformation can be accurately identified by this method. The proposed rectifying control technology can effectively decrease the wire diameter fluctuation during dieless drawing, that is, the standard deviation of the wire diameter fluctuation could be decreased fi＇om 0.30 to 0.08 mm after three passes of dieless drawing, indicating that the control system has a good rectifying ability.

关键词： wire drawing rectification deformation machine vision closed loop control systems nickel alloys sha^oe memory effect