Analysis of the Influence of Drawing Speed on the Amount of Retained Austenite in TRIP Steel Wires

2013 ◽  
Vol 199 ◽  
pp. 379-383 ◽  
Author(s):  
Sylwia Wiewiórowska ◽  
Zbigniew Muskalski
Keyword(s):  
Trip Steel ◽  
Retained Austenite ◽  
Wire Drawing ◽  
Austenitic Steels ◽  
Structure Evolution ◽  
Drawing Process ◽  
Strain Intensity ◽  
Steel Wires ◽  
Drawing Speed ◽  
Plastic Deformation Process

The specific properties of TRIP steel can be obtained by the occurring the effect of additional plasticity during transformation of metastable retained austenite into martensite caused by plastic deformation process. Research carried out for highly alloyed austenitic steels with TRIP effect proved the influence of strain intensity, chemical composition and deformation temperature on efficiency marteniste transformation. In the work research concerned with the influence change of drawing speed on retained austenite amount in drawn wires structure was shown. In available literature there are no publications concerned with the influence of wire drawing process parameters on the structure evolution the medium carbon TRIP steel wires. Research shown in the work was realized with the assumption that the strain intensity is determined by scheme of single and total reductions, and the value of strain rate is a result of used in wire drawing process drawing speed.

The Influence the Temperature of Drawing Process on the Transformation Retained Austenite into Martensite for TRIP Steel Wires

2015 ◽  
Vol 220-221 ◽  
pp. 661-666
Author(s):  
Sylwia Wiewiórowska ◽  
Zbigniew Muskalski ◽  
Marek Siemiński
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Trip Steel ◽  
Retained Austenite ◽  
Steel Wire ◽  
Wire Drawing ◽  
Drawing Process ◽  
Wire Surface ◽  
Wire Axis ◽  
Steel Wires

For the numerical analysis of TRIP steel wire drawing process, the Drawing 2d programme based of finite element method, has been used. The process was run following two variants, with small and large partial drafts for two drawing speeds: 1.11; 0.23 m/s. The investigations carried out allowed a relationship between temperature of drawing wires and the amount of retained austenite for wire surface and for wire axis.

scholarly journals The Influence of the Drawing Process on the Mechanical Properties of TRIP Steel Wires with 0.4% C Content

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5769
Author(s):  
Monika Kucharska ◽  
Sylwia Wiewiórowska ◽  
Jacek Michalczyk ◽  
Andrzej Gontarz
Keyword(s):  
Mechanical Properties ◽  
Retained Austenite ◽  
Process Analysis ◽  
Steel Wire ◽  
Experimental Tests ◽  
Wire Drawing ◽  
Drawing Process ◽  
The Finite Element Method ◽  
Steel Wires ◽  
Drawing Speed

In the work, the results of the research concerned with the TRIP (Transformation Induced Plasticity) steel wire drawing process in experimental and theoretical ways are shown. The wire drawing process tests on the experimental way were conducted in both laboratories as well as industrial conditions, with the use of two drawing speeds (1.6 and 6 m/s) and two drawing schemes (low and high single reductions). The mechanical properties of wires drawn with high drawing speed equal to 6 m/s showed higher values of mechanical properties for wires drawn with low single reductions than for wires drawn with high single reductions. Such a phenomenon contradicts the theory of drawing wires from steel with a ferritic-pearlitic structure and must be related to TRIP structure and the presence of retained austenite in it, which is transformed into martensite during the deformation process. In order to explain this phenomenon, the theoretical wire drawing process analysis was conducted with the use of the Drawing 2D program based on the finite element method. On the base of the simulation, a large increase in temperature was found on the surface for wires drawn with high drawing speed and low single reductions, which can cause the blocking of transformation retained austenite into martensite and thus a decrease in Rm. To confirm this thesis, further studies will include tests of the amount of retained austenite in wires obtained during experimental tests.

The High Speed Wire Drawing Process of Steel Wires under Fluid Frictions Conditions

2016 ◽  
Vol 716 ◽  
pp. 76-84
Author(s):  
Maciej Suliga
Keyword(s):  
High Speed ◽  
High Carbon Steel ◽  
Wire Drawing ◽  
Drawing Process ◽  
The Finite Element Method ◽  
Wire Surface ◽  
Steel Wires ◽  
Drawing Speed ◽  
The Wire ◽  
Multiparameter Analysis

The essential purpose of the work was to determine the phenomena that occur in multipass wire drawing process of high carbon steel wires with high speed in hydrodynamic dies and to assess their influence on moulding the wire properties after the drawing process. The multiparameter analysis of the issues has involved the theoretical dissection of the phenomena arising in high speed wire drawing process in hydrodynamic dies with the usage of the finite element method supported by the experimental multipass drawing process in industrial conditions. On the basis of numerical analysis the influence of drawing speed on wire temperature was estimated. For final wires the investigation of mechanical properties, topogrhaphy of wire surface, the amount of lubricant on the wire surface, the pressure of lubricant in hydrodynamic dies were determined.

scholarly journals The Analysis of “Hot” Drawing Process of Trip Steel Wires at Different Initial Temperatures

2016 ◽  
Vol 61 (4) ◽  
pp. 1991-1994
Author(s):  
S. Wiewiórowska ◽  
Z. Muskalski ◽  
M. Siemiński
Keyword(s):  
Trip Steel ◽  
Retained Austenite ◽  
Drawing Process ◽  
Steel Wires ◽  
Hot Drawing ◽  
Preliminary Research

Abstract In the work the results of preliminary research of the „hot” drawing process of TRIP steel wires at different initial temperatures has been shown. The study is expected to find whether the „hot” drawing process, and so the increase in the temperature of the material being drawn, will block the transformation of retained austenite into martensite and, as a consequence, influence the properties of drawn wire.

scholarly journals The Analysis of the High Speed Wire Drawing Process of High Carbon Steel Wires Under Hydrodynamic Lubrication Conditions

2015 ◽  
Vol 60 (1) ◽  
pp. 403-408 ◽  
Author(s):  
M. Suliga
Keyword(s):  
High Speed ◽  
Hydrodynamic Lubrication ◽  
High Carbon Steel ◽  
Wire Drawing ◽  
Drawing Process ◽  
Wire Surface ◽  
Compressive Stresses ◽  
Steel Wires ◽  
Drawing Speed ◽  
The Wire

Abstract In this work the analysis of the wire drawing process in hydrodynamic dies has been done. The drawing process of φ5.5 mm wire rod to the final wire of φ1.7 mm was conducted in 12 passes, in drawing speed range of 5-25 m/s. For final wires of φ1.7 mm the investigation of topography of wire surface, the amount of lubricant on the wire surface and the pressure of lubricant in hydrodynamic dies were determined. Additionally, in the work selected mechanical properties of the wires have been estimated. It has been shown that in the drawing process under hydrodynamic lubrication by drawing speed of 25 m/s the phenomena of uncontrolled formation of the surface and the diameter of the wire appears, and in the process the compressive stresses eliminating cracks on the wire surface occur, causing further smoothing. The wires drawn hydrodynamically in speed of 25 m/s, besides clearly worse properties compared to the wires drawn hydrodynamically at speeds in the range of 5 to 20 m/s, also exhibit large dimensional variations.

scholarly journals Analysis of the Heating of Steel Wires During High Speed Multipass Drawing Process/ Analiza Nagrzewania Się Drutów Stalowych W Procesie Ciągnienia Wielostopniowego Z Dużymi Prędkosciami

2014 ◽  
Vol 59 (4) ◽  
pp. 1475-1480 ◽  
Author(s):  
M. Suliga
Keyword(s):  
Surface Layer ◽  
High Speed ◽  
Heated Surface ◽  
Experimental Studies ◽  
Drawing Process ◽  
Heat Accumulation ◽  
Steel Wires ◽  
Drawing Speed ◽  
The Wire ◽  
Surface Layer Thickness

Abstract The analysis of the heating of the wire including theoretical studies showed that in the multistage drawing process a increase drawing speed causes intense heating of a thin surface layer of the wire to a temperature exceeding 1100°C, which should be explained by the accumulation of heat due to friction at the interface between wire and die. It has been shown that with increasing of drawing speed the heated surface layer thickness measured at the exit of the wire from the dies is reduced significantly and at drawing speed of 25 m/s is equal to about 68 μm. The decrease in the thickness of this layer can be explained by a shorter time of heat transfer to the wire, which causes additional heat accumulation in the surface layer. Thus fivefold increase in drawing speed caused an approximately 110% increase in the temperature in the surface layer of the wire. Experimental studies have shown that the increase of drawing speed of 5 to 25 m/s will increase the temperature of the wire after coiled on the spool more than 400%.

scholarly journals Effect of Process Parameters in Copper-Wire Drawing

Metals ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 105 ◽  
Author(s):  
Gustavo Aristides Santana Martinez ◽  
Wei-Liang Qian ◽  
Leonardo Kyo Kabayama ◽  
Umberto Prisco
Keyword(s):  
Hydrodynamic Lubrication ◽  
Copper Wire ◽  
Wire Drawing ◽  
Drawing Process ◽  
Stress Distributions ◽  
Operational Parameters ◽  
Die Geometry ◽  
Drawing Speed ◽  
Industrial Productivity ◽  
The Wire

The efforts to increase the operating speed of the wire drawing process play a crucial role regarding the industrial productivity. The problem is closely related to various features such as heat generation, material plastic deformation, as well as the friction at the wire/die interface. For instance, the introduction of specific lubricants at the interface between the die and the wire may efficiently reduce the friction or in another context, induce a difference in friction among different regimes, as for the case of hydrodynamic lubrication. The present study systematically explores various aspects concerning the drawing process of an electrolytic tough pitch copper wire. To be specific, the drawing speed, drawing force, die temperature, lubricant temperature, and stress distributions are analysed by using experimental as well as numerical approaches. The obtained results demonstrate how the drawing stress and temperature are affected by the variation of the friction coefficient, die geometry, and drawing speed. It is argued that such a study might help in optimizing the operational parameters of the wire drawing process, which further leads to the improvement of the lubrication conditions and product quality while minimizing the energy consumption during the process.

Examination of the Effect of Variation in Stress Magnitude on the Amount of Transformed Retained Austenite in the Structure of TRIP Steel Wires

2016 ◽  
Vol 716 ◽  
pp. 311-316
Author(s):  
Marek Siemiński ◽  
Sylwia Wiewiórowska ◽  
Zbigniew Muskalski
Keyword(s):  
Trip Steel ◽  
Retained Austenite ◽  
Point Of View ◽  
Bending Stress ◽  
Volumetric Fraction ◽  
Austenite Transformation ◽  
Steel Wires ◽  
Variable Stresses ◽  
Practical Dimension ◽  
Additional Hardening

A detailed analysis of the effect of variable stresses on the intensity of retained austenite transformation into martensite was carried out in the work. Tests were done for three bending stress (σmax) levels, lower than the value of the yield stress (R0.2) the material tested. Preliminary tests conducted for one bending stress value have shown that a certain amount of untransformed retained austenite remains in the material in spite of applying as many as 40 000 fatigue cycles. It is therefore necessary to determine whether and, if so, in what extent the magnitude of applied bending stress will increase or decrease that amount of retained austenite. It should be established whether, for different bending stress levels, the curves describing the variation in the volumetric fraction of retained austenite of the tested wire structure, will approximate asymptotically the same value, or the values will, after all, be different.The results of these studies have a practical dimension, since, e.g. a screw made of the TRIP steel, subjected to variable stresses in service, may undergo additional hardening to a varying extent, which will influence its mechanical properties, life and operation safety.The knowledge acquired from the studies will constitute a novelty in this scope of applications, and will be useful from the point of view of both the manufacturer and the user.

scholarly journals Intensification of the Transition of Retained Austenite to Martensite Effected by Changing the Stress State in Trip Steel Wires / Intensyfikacja Przemiany Austenitu Szczątkowego W Martenzyt Pod Wpływem Zmiany Stanu Naprężenia W Drutach Ze Stali Typu Tr Ip

2015 ◽  
Vol 60 (4) ◽  
pp. 2729-2732
Author(s):  
S. Wiewiórowska ◽  
Z. Muskalski ◽  
W. Ciepiela
Keyword(s):  
Mechanical Properties ◽  
Stress State ◽  
Trip Steel ◽  
Retained Austenite ◽  
Cyclic Stresses ◽  
Steel Wires ◽  
Steel Grades ◽  
External Stresses ◽  
Rotating Bending

Change in the stress state is one of the factors that determined the transition of retained austenite to martensite. It has been proved that in products made from wires of a TRIP structure, which is characterized by a high retained austenite content, loading them with varying in sign cyclic stresses of magnitudes lower than yield strength (R0.2) results in intensive transition of the retained austenite to martensite. The paper presents a comparative analysis of investigation results concerning the determination of the quantity of retained austenite in the structure of wire for two TRIP steel grades with varying carbon content after they have been loaded with varying in sing cyclic stresses of a magnitude smaller than R0.2 under rotating bending conditions. The investigation carried out has determined whether and, if so, to what extent the loading of wire with cyclic external stresses of magnitudes lower than R0.2 may influence the quantity of transformed retained austenite and thus the mechanical properties of the products.

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