Microstructure, Property Changes and Characterization for ST 35 Steel Material during Multiple Pass Cold Drawing Process of Seamless Tubes

2018 ◽  
Vol 5 (2) ◽  
pp. 7615-7621
Author(s):  
D.B. Karanjule ◽  
S.S. Bhamare ◽  
T.H. Rao
Keyword(s):  
Cold Drawing ◽  
Drawing Process ◽  
Multiple Pass ◽  
Steel Material ◽  
Property Changes ◽  
35 Steel

Variation of Residual Stresses in Drawn Copper Tubes

2008 ◽  
Vol 571-572 ◽  
pp. 21-26 ◽  
Author(s):  
Adele Carradò ◽  
D. Duriez ◽  
Laurent Barrallier ◽  
Sebastian Brück ◽  
Agnès Fabre ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Residual Stresses ◽  
Material Flow ◽  
Cold Drawing ◽  
Axisymmetric Deformation ◽  
Tube Length ◽  
Inhomogeneous Deformation ◽  
Drawing Process ◽  
Process Step ◽  
Residual Strains

Seamless tubes are used for many applications, e.g. in heating, transport gases and fluids, evaporators as well as medical use and as intermediate products for hydroforming and various mechanical applications, where the final dimensions normally are given by some cold drawing steps. The first process step – piercing of the billet, for example by extrusion or 3-roll-milling - typically results in ovality and eccentricity in the tube causing non-symmetric material flow during the cold drawing process, i.e. inhomogeneous deformation. Because of this non-axisymmetric deformation and of deviations over tube length caused by moving tools, this process step generates residual stresses. To understand the interconnections between the geometrical changes in the tubes and the residual stresses, the residual strains in a copper tube had been measured by neutron diffraction.

Deformation Law of Cold Drawing Process of High Strength Bridge Cable Steel

2021 ◽  
Vol 1035 ◽  
pp. 801-807
Author(s):  
Xiao Lei Yin ◽  
Jian Cheng ◽  
Gang Zhao
Keyword(s):  
Strain Path ◽  
High Strength ◽  
Cold Drawing ◽  
Wire Drawing ◽  
Radial Deformation ◽  
Steel Bridge ◽  
Drawing Process ◽  
Single Pass ◽  
Potential Relationship ◽  
The Wire

High-strength cable-steel bridge is the “lifeline” of steel structure bridges, which requires high comprehensive mechanical properties, and cold-drawing is the most important process to produce high-strength cable-steel bridge. Therefore, through the ABAQUS platform, a bridge wire drawing model was established, and the simulation analysis on the process of stress strain law and strain path trends for high-strength bridge steel wire from Φ 12.65 mm by seven cold-drawing to Φ 6.90 mm was conducted. The simulation results show that the wire drawing the heart of the main axial deformation, surface and sub-surface of the main axial and radial deformation occurred, with the increase in the number of drawing the road, the overall deformation of the wire was also more obvious non-uniformity. In the single-pass drawing process, the change in the potential relationship of each layer of material was small, and multiple inflection points appeared in the strain path diagram; the change in the seven-pass potential relationship was more drastic, which can basically be regarded as a simple superposition of multiple single-pass pulls.

Influence of the Degree of Cold Drawing over the Wear Test and XRD Analysis of Pipes Used for Dampers

2014 ◽  
Vol 659 ◽  
pp. 85-90
Author(s):  
Bogdan Istrate ◽  
Corneliu Munteanu ◽  
Petru Simion ◽  
Vasile Dia ◽  
Petru Avram ◽  
...  
Keyword(s):  
Wear Test ◽  
Cold Drawing ◽  
Scratch Test ◽  
Xrd Analysis ◽  
Test Point ◽  
Suspension System ◽  
Point Of View ◽  
Main Body ◽  
Material Loss ◽  
Steel Material

Dumpers have studied intensively in the last years and they are the main parts of the suspension system with vertical oscillations role in the absorption of the automobile. The combination of suspension coil with dumper is forming the main body of the suspension system. Dumpers are mainly used for production of automotive industry. The influence of the degree of cold drawing on the mechanical properties of the carbon steel material were studied for the XRD and wear test point of view using microtribometer and diffractometer test machines. The purpose of the work is to observe the main effects of the degree of reduction at different gradations by analysing the X-Ray diffraction – crystallographic determination and scratch test by observing the wear tracks. It was finally measured the loss of material during the wear test, the sample with the highest grade of plastic deformation had the lowest material loss.

Influence of Thermomechanical Processing on the Martensitic Transformation Temperatures of NiTi SMA Wire

2010 ◽  
Vol 643 ◽  
pp. 43-48 ◽  
Author(s):  
Leonardo Kyo Kabayama ◽  
Odair Doná Rigo ◽  
Jorge Otubo
Keyword(s):  
Martensitic Transformation ◽  
Thermomechanical Processing ◽  
Cold Drawing ◽  
Wire Drawing ◽  
Mechanical Processing ◽  
Drawing Process ◽  
Intermediate Annealing ◽  
Transformation Temperatures ◽  
Area Reduction ◽  
Niti Sma

Most of the applications of NiTi SMA are as a wire form. In this sense it is important to know the effects of thermo-mechanical processing such as reduction per pass and intermediate annealing on the wire drawing process. For this work they were produced wire by cold drawing using 15 % area reduction per pass with and without intermediate annealing. The starting ingot was produced by VIM process. The influence of thermo-mechanical processing will be related to the martensitic transformation temperatures.

Optimization of Die design to abolish surface defect on Telescopic Front Fork (TFF) Tube

2021 ◽  
Vol 01 ◽  
Author(s):  
Asit Kumar Choudhary ◽  
Braj Bihari Prasad
Keyword(s):  
Outer Surface ◽  
Transverse Crack ◽  
Axial Stress ◽  
Substantial Reduction ◽  
Cold Drawing ◽  
Wire Drawing ◽  
Die Design ◽  
Drawing Process ◽  
Die Geometry ◽  
Area Reduction

Background: The telescopic fork is mainly used for suspension purposes in the different devices to absorb the vibration and disturbances from the road or mechanical devices. Factors such as die angle, drawing velocity, lubrication, and area reduction per pass significantly affect the drawing loads and residual stresses formed in the drawn tube during the tube marking process. Objective: Instantaneous transverse crack was found on the pipe's outer surface during the drawing process in the current work, and the key challenges were to reduce the percentage of pipe rejection. Methodology: In this work, optimum drawing die designs were proposed by using the finite element method (FEM). A FEM solving tool called Abaqus has been used for simulating and solving the cold-rolled process. The FEM model of the cold drawing process is generated in Abaqus with the same boundary condition (Axial load and constrain) as using on the actual wire drawing machine. Result: There was a substantial reduction in the area; axial stress (Tensile) along the die side is 672 MPa which is 23 % lower than the current die axial stress value of 877 MPa. A 48 % plastic strain was found along the purposed die side, which was 17 % lower than the existing strain of 64%. Finally, reduced the area by changing the die geometry from ~52% to 35 to 40 %. Conclusion: It was possible to abolish transverse crack on the pipe's outer surface to reduce the area reduction (35 to 40 %) in the output tube and strain (17 %). As part of the optimization of the FEM work process, this work gives us encouraging results. Further research will be considered for future positions.

Computer Simulation of Aluminum Conductors Drawn in High Speed

2013 ◽  
Vol 834-836 ◽  
pp. 1567-1570
Author(s):  
Ming Xue Yang ◽  
Jing Tian Luan ◽  
Tian Guo Zhou ◽  
Xue Fei Zhang
Keyword(s):  
High Speed ◽  
Cold Drawing ◽  
Drawing Process ◽  
Stress Strain ◽  
Drawing Speed ◽  
First Pass ◽  
3D Software ◽  
Distribution Of Stress ◽  
Deform 3D ◽  
Head Line

Drawing speed is one important process in production over-head line, deform 3d software is used to simulate the drawing process. The distribution of stress-strain and temperature in different drawing speed with die angle and friction coefficient was investigated. The results shows that the aluminum conductors can be used in high speed drawing when die angle, drawing speed and frication coefficient of first pass is about11~13 degrees, 4~6m/s and 0.08~0.10 respectively, the uniformity of stress-strain and temperature is better for producing good quality over-head wires with high cold-drawing speed.

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