A Plasto-Hydrodynamic Analysis of the Lubrication and Coating of Wire Using a Polymer Melt during Drawing

1977 ◽  
Vol 191 (1) ◽  
pp. 115-123 ◽  
Author(s):  
P.J. Thompson ◽  
G.R. Symmons
Keyword(s):  
Steel Wire ◽  
Polymer Melt ◽  
Wire Drawing ◽  
Operating Conditions ◽  
Hydrodynamic Analysis ◽  
The Wire

A study is undertaken of the lubrication of steel wire drawing using a Christopherson tube and a polymer melt as a lubricant. Primary objectives of the study are to determine the criteria under which a thin, well adhered coat of the polymer is deposited on the wire after drawing. An analysis determines these criteria and enables the polymer coat thickness to be obtained for given operating conditions. Several flow defects are observed and discussed.

scholarly journals Correlation of Strain Path, Texture, Twinning, and Mechanical Properties in Twinning-Induced Plasticity Steel during Wire Drawing

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2250 ◽  
Author(s):  
Joong-Ki Hwang
Keyword(s):  
Mechanical Properties ◽  
Strain Path ◽  
Electron Backscatter Diffraction ◽  
Steel Wire ◽  
Effective Strain ◽  
Metal Flow ◽  
Wire Drawing ◽  
Surface Areas ◽  
The Wire ◽  
Backscatter Diffraction

The effect of changing the strain path on texture development, twin kinetics, and mechanical properties in twinning-induced plasticity steel was investigated to understand twinning behavior in more detail. Among the various plastic deformation processes, the wire drawing process was selected to achieve the aims of the study. Specimens of cold-drawn TWIP steel wire under the same effective strain but with different crystallographic textures were successfully fabricated using the effect of the wire drawing direction. Electron backscatter diffraction results showed that the drawn wires using both unidirectional (UD) and reverse-directional (RD) wire drawing processes were characterized as duplex fiber textures of major <111> and minor <100>. It was found that the RD wire had a higher fraction of <111> component at both the center and surface areas compared to the UD wire, because the metal flow of the RD wire was beneficial for the development of a <111> orientation. The pronounced <111> crystallographic orientation of the RD wire activated the twinning rate and geometrically necessary dislocation density, leading to an increase in strength but a decrease in ductility. The strain path is as important as the amount of strain for strengthening the materials, especially those that are deformed by twinning.

scholarly journals Research of the influence of highcarbon steel wire drawing speed on stresses and deformations on wire cross section

2019 ◽  
pp. 73-77
Author(s):  
Yu. L. Bobarikin ◽  
Yu. V. Martyanov
Keyword(s):  
Residual Stresses ◽  
Cross Section ◽  
Steel Wire ◽  
Wire Drawing ◽  
Drawing Rate ◽  
Drawing Speed ◽  
Wire Cross Section ◽  
The Absolute ◽  
The Wire ◽  
Residual Stresses And Strains

The parameters of wire production affecting the distribution of residual stresses and strains on the wire cross section are considered. It is determined that the modes of coarse drawing can affect the complex of mechanical properties of thin wire due to the uneven distribution of equivalent stresses and strains. The rough drawing speed is chosen as the investigated parameter.The effect of the coarse drawing rate of high-carbon steel wire on the distribution of equivalent residual stresses and strains over the wire cross section is studied by numerical simulation of wire drawing at different speeds by the finite element method. The values of equivalent residual stresses for the selected drawing route along the wire cross-section zones are determined. The analysis of the equivalent stress distribution over the wire cross section is made.It is shown that the increase in the speed of coarse drawing increases the uniformity of the distribution of equivalent residual stresses, does not have a negative effect on the deformed state of the wire, increases the absolute values of equivalent residual stresses, slightly reduces the absolute values of residual deformations.

Experimental and numerical analysis of the deformation in mild steel wire during dieless drawing

2002 ◽  
Vol 216 (3) ◽  
pp. 167-178 ◽  
Author(s):  
P Tiernan ◽  
M T Hillery
Keyword(s):  
Mild Steel ◽  
Steel Wire ◽  
Wire Drawing ◽  
Fe Model ◽  
Drawing Process ◽  
Distribution Profile ◽  
Dieless Drawing ◽  
The Wire ◽  
Drawing Dies ◽  
Good Agreement

Dieless wire drawing is the process of causing a reduction in a wire diameter without the use of conventional wire drawing dies. The wire, axially loaded with a force, is heated to an elevated temperature to initiate plastic deformation. The mechanics of this novel drawing process and a theoretical analysis of the deformation are discussed in this paper. The results of an experimental drawing programme carried out with mild steel wire at temperatures between 400 and 900°C are also presented. Mathematical models were developed and used to describe and predict the process deformation and both the stress and temperature distribution profile along the workpiece. A machine was designed and manufactured to facilitate an experimental programme of dieless drawing. The machine permitted continuous drawing of wire, while the reduction ratio, drawing load and temperature were automatically controlled using a personal computer. A finite element (FE) model of the wire was developed, and the results obtained from the FE analysis show good agreement with those obtained from both the experimental work and the mathematical modelling. Results obtained confirm that a complicated interdependence of the process parameters exists during the dieless drawing process.

Structure Evolution in Steel Wires During Drawing

2011 ◽  
Vol 194-196 ◽  
pp. 218-223 ◽  
Author(s):  
Hai Bo Huang ◽  
Lei Wang ◽  
Fan Li
Keyword(s):  
Amorphous Phase ◽  
Steel Wire ◽  
Cold Drawing ◽  
Wire Drawing ◽  
Fiber Texture ◽  
Structure Evolution ◽  
Strength Increase ◽  
Steel Wires ◽  
The Wire ◽  
The Relationship

In present research, the structure evolution of the pearlite steel wire during cold drawing is systematically investigated, and the relationship between structure evolution and strength increase during wire drawing is analyzed. During cold drawing, the wire strength increases; inter-lamellar spaces of the pearlites decrease, which has an important effect on properties of cold drawn wires; accumulation of high density dislocation in ferrite phase can be thought to be one of the reasons for strengthening the wire, meanwhile, the amorphous phase forming in cemetites also make the wire strengthen; especially, the wire strength is effected seriously by the intensity of the fiber texture <110>, and as drawing, the wire strength increases.

A Novel Technique of wire Drawing

1982 ◽  
Vol 24 (1) ◽  
pp. 1-4 ◽  
Author(s):  
M. S. J. Hashmi ◽  
G. R. Symmons ◽  
H. Parvinmehr
Keyword(s):  
Polymer Melt ◽  
Wire Drawing ◽  
Wire Diameter ◽  
Drawing Process ◽  
Die Wear ◽  
Good Surface ◽  
Start Up ◽  
Good Surface Finish ◽  
The Wire ◽  
A New Technique

In the conventional wire drawing process the reduction is achieved by pulling the wire through a tapered die. The minimum bore size of such a die is always smaller than the inlet wire diameter. A suitable lubricant is used to reduce the die wear and drawing load and to produce a good surface finish. Nevertheless, the problem of die wear and wire breakage during start-up is always present. In this paper a new technique of wire drawing is being reported which eliminates the problem of wear and breakage during start-up and also the need to have the diameter of the leading end of the wire reduced for easy insertion through the die. The reduction of the wire diameter is affected by means of the hydrodynamic action of a polymer melt lubricant in conjunction with a long tapering tube, the diameter of the tube being greater than the nominal wire diameter. Reductions in area of up to 21 per cent can be obtained in one single pass using this dieless reduction unit.

Pass Schedule of Wet-Wire Drawing Process with Ultra High Speed for Tire Steel Cord

2007 ◽  
Vol 340-341 ◽  
pp. 683-688 ◽  
Author(s):  
Sang Kon Lee ◽  
Won Ho Hwang ◽  
Dae Cheol Ko ◽  
Byung Min Kim ◽  
Woo Sik Ko
Keyword(s):  
Carbon Steel ◽  
High Speed ◽  
Steel Wire ◽  
High Carbon Steel ◽  
Wire Drawing ◽  
Drawing Process ◽  
High Carbon ◽  
Wire Temperature ◽  
Steel Cord ◽  
The Wire

High speed multi pass wet wire drawing has become very common for production of high carbon steel cord because of the increase in customer demand and production rates in real industrial fields. Although the wet wire drawing is preformed at a high speed usually above 1000 m/min, greater speed is required to improve productivity. However, in the high carbon steel wire drawing, the wire temperature rises greatly as the drawing speed increase. The excessive temperature rise makes the wire more brittle and finally leads to wire breaks. In this study, the variations in wire temperature during wet wire drawing process were investigated. A multi pass wet wire drawing process with 21 passes, which was used to produce steel cord, was redesigned by considering the increase in temperature. Through a wet wire drawing experiment, it was possible to increase the maximum final speed from 1000 m/min to 2000 m/min.

Effect of Drawing Processes on Wire Breaking in Steel Wire Production

2014 ◽  
Vol 941-944 ◽  
pp. 1667-1670
Author(s):  
Ying Lei Xu
Keyword(s):  
Compression Ratio ◽  
Steel Wire ◽  
Wire Drawing ◽  
Drawing Process ◽  
Drawing Speed ◽  
Bending Stresses ◽  
The Wire ◽  
The Right ◽  
The Impact ◽  
Main Factor

Wire breaking is a major factor in the impact of wire drawing production, and drawing process is an important factor causing the wire breaking, which cannot be ignored. In this paper, the impact of tension, bending stresses, centrifugal stresses, compression ratio of die arrangement and drawing speed in the process of the wire drawing process on wire breaking were calculated theoretically. Then the corresponding measurements to reduce the rate of wire breaking were proposed. The results show that the the tension of drawing process was the main factor, while choosing the right compression ratio and drawing speed according to the actual situation, the rate of wire breaking could be reduced effectively.

Computer Simulation of Micro-Mechanic in Pearlitic Steel Wire Drawing

2020 ◽  
Vol 989 ◽  
pp. 684-690
Author(s):  
Dmitriy Konstantinov ◽  
Boris Zaritskiy ◽  
Denis Pustovoytov
Keyword(s):  
Computer Simulation ◽  
Strain Localization ◽  
Steel Wire ◽  
High Carbon Steel ◽  
Interlamellar Spacing ◽  
Pearlitic Steel ◽  
Wire Drawing ◽  
Metallographic Analysis ◽  
Drawing Process ◽  
The Wire

Cold-drawn high-carbon steel wire with pearlite microstructure is one of the most popular raw materials for modern reinforcing ropes. Lamellae thinning, changes in interlamellar interface and metallographic texture, strain localization is the main property-forming phenomena in the wire drawing process. However, the experimental study of these phenomena dynamics is difficult and time-consuming. Drawing process of pearlitic steel wire was investigated. Behavior of pearlite colonies on the surface and the central layer of the wire were researched, based on the multiscale computer simulation. Cementite lamellae orientation in relation to the drawing axis, interlamellar spacing and shape of cementite inclusions were key factors. Regularities of the pearlite colonies reorientation, changing the shape and size of cementite lamellae and strain localization in the ferrite were established on the basis of FEM. It was established that the cementite lamellae, that are parallel to the drawing axis, had the maximum thinning. Interlamellar distance in pearlite colonies with such lamellae changed most intensively. Cementite lamellae, that are perpendicular to the drawing axis, are the most susceptible to fracture. It was found out that for certain values interlamellar distance this effect can be reduced. Intensive reorientation of pearlite colonies in relation to the drawing axis was observed in the case of their location at an angle to the drawing direction. At the same time, there was a significant bending of cementite lamellae and their susceptibility to fragmentation. Estimated values of the wire mechanical properties were compared with a real experiment. The simulation results were verified by metallographic analysis.

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