The influence of the High Drawing Speed on Mechanical-Technological Properties of High Carbon Steel Wires

In this work the influence of the die approach and bearing part of die on mechanical-technological properties of high carbon steel wires has been assessed. The drawing process of φ5.5 mm wires to the final wire of φ2.9 mm was conducted in 6 passes, by means of a multi-die drawing machine Koch type. The drawing speeds in the last passes were: 7 m/s. For wires drawn according to four variants the investigation of mechanical-technological properties has been carried out, in which yield strength, tensile strength, uniform and total elongation, reduction of area, the number of twists and the number of bends were determined. On the basis of numerical analyses wire drawing process, the influence of geometry of die on redundant strain and effective strain has been determined. The investigations have shown the essential influence of geometry of die on mechanical-technological properties of high carbon steel wires. It has been shown that the increase of strength properties in wires drawn with high die angle is related to the occurrence in their bigger effective strain.

Download Full-text

The Influence of the Value of Single Draft on Mechanical-Technological Properties of High Carbon Steel Wires

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.165.371 ◽

2010 ◽

Vol 165 ◽

pp. 371-376 ◽

Cited By ~ 1

Author(s):

Maciej Suliga

Keyword(s):

Tensile Strength ◽

Carbon Steel ◽

High Carbon Steel ◽

Wire Drawing ◽

Strength Properties ◽

Drawing Process ◽

Technological Properties ◽

High Carbon ◽

Steel Wires ◽

Optimal Value

In this work the influence of value of single draft on mechanical-technological properties of high carbon steel wires was evaluated. For wires drawn with medium single draft (10.4 %, 15.5 % and 26.5 %) the investigation of mechanical-technological properties was performed thereby providing results on yield strength, tensile strength, elongation, contraction, number of twist and number of band. On the basis of numerical analysis of wire drawing process the influence of the value of single draft on inhomogeneity of strain was determined. It was established that in the range of medium single drafts 10-26 % used in drawing process of high carbon steel wires large single drafts cause the increase of their strength properties by deterioration of their plasticity properties. It was demonstrated that the increase of strength properties in wires drawn with larger single drafts is related to the occurrence of higher non-dilatational strain, which cause additional work hardening of material. The theoretical-experimental analysis of drawing of high carbon steel wires enabled evaluation of optimal value of single drafts by which it can be used relatively the most advantageous useful properties of wires. Obtained research results can be applied while designing the production process of high carbon steel wires.

Download Full-text

The Influence of the High Speed Multipass Drawing Process on the Fatigue Strength of High Carbon Steel Wires / Wpływ Wielostopniowego Procesu Ciągnienia Z Dużymi Prędkościami Na Wytrzymałość Zmęczeniową Drutów Ze Stali Wysokowęglowej

Archives of Metallurgy and Materials ◽

10.2478/v10172-012-0131-3 ◽

2012 ◽

Vol 57 (4) ◽

pp. 1171-1178

Author(s):

M. Suliga

Keyword(s):

Fatigue Strength ◽

Carbon Steel ◽

High Speed ◽

New Technologies ◽

High Carbon Steel ◽

Favourable Effect ◽

Drawing Process ◽

High Carbon ◽

Steel Wires ◽

Drawing Speed

In this work the influence of the drawing speed on fatigue strength of high carbon steel wires has been assessed. The drawing process of φ5.5 mm wires to the final wire of φ1.6 mm was conducted in 11 passes, in industrial conditions, by means of a modern Koch multi-die drawing machine. The drawing speeds in the last passes were: 5, 10, 15 and 20 m/s. For φ1.6 mm wires the investigation of fatigue strength has been carried out. In order to explain the effect of drawing speed on fatigue strength of rope wires, the roughness of drawn wires have been also determined. In addition, the numerical analysis of the drawing process on the base of Drawing 2D in which distribution of redundant strain, has been shown. The data of investigations prove the favourable effect of high drawing speed on fatigue strength of drawn wires. It was found that the better fatigue strength of wires drawn at the speed of 20 m/s compared to the wires drawn at the speeds of 5-15 m/s is associated with a better geometric structure of the surface of those wires. In addition to the high fatigue strength of the wires drawn with high speed is related to theirs higher redundant strain. The obtained data investigation can be applied in wire industry while implementing the new technologies of high speed drawing process of high carbon steel wires.

Download Full-text

The Analysis of the Mechanical Properties of High Carbon Steel Wires after Multipass High Speed Drawning Process in Conventional and Hydrodynamic Dies

Archives of Metallurgy and Materials ◽

10.2478/amm-2014-0111 ◽

2014 ◽

Vol 59 (2) ◽

pp. 681-685 ◽

Cited By ~ 2

Author(s):

M. Suliga

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Carbon Steel ◽

Yield Strength ◽

High Speed ◽

High Carbon Steel ◽

Strength Properties ◽

High Carbon ◽

Steel Wires ◽

Drawing Speed

Abstract In this work the influence of the drawing speed on lubrication conditions and mechanical properties of high carbon steel wires drawn in conventional and hydrodynamic dies has been assessed. The drawing process of ϕ5.5 mm wires to the final wire of ϕ1.7 mm was conducted in 12 passes, in industrial conditions, by means of a modern Koch multi-die drawing machine. The drawing speeds in the last passes were: 5, 10, 15, 20 and 25 m/s. For final wires ϕ1.7 mm the investigation of mechanical properties has been carried out, in which yield strength, tensile strength, uniform and total elongation and also number of twists were determined. It has been shown that the increase of drawing speed from 5 m/s up to 25 m/s caused the increase by 6% strength properties and decrease of plasticity properties by 10%. Higher values of tensile strength and yield strength of the wires drawn conventionally with high speeds are associated with worse conditions, while in case of wires drawn hydrodynamically the main factor which caused the increase of strength properties was high lubricant pressure in hydrodynamic die, which caused the increase of total draft.

Download Full-text