Cold Drawn Specialty Shape Steel Bar

Specification

Introduction

Features

Process

Product Introduction

Cold drawn steel bar is a kind of steel bar product processed by cold drawing process. In the cold drawing process, the low carbon steel bar is placed on the cold drawing machine, and through the way of strong drawing to make it through the mold hole smaller than the diameter of the original steel bar 0.5 to 1.0 mm, so that the steel bar is drawn into a smaller diameter steel wire.
In this process, the steel bar will produce transverse compression and longitudinal tensile, and its internal lattice will slip, so that the tensile strength is significantly increased, usually by 50% to 90%, but the plasticity will be reduced, and the hardness will be increased.

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Advantageous Features

High strength and high hardness

The strength of cold drawn steel round bar is increased by 10% to 20% compared with hot-rolled steel bars, and has high tensile strength and fatigue resistance. This characteristic makes it better able to withstand external extrusion and tensile forces to meet the demand for high-strength steel bars in engineering projects, thereby improving the safety of construction projects. At the same time, its hardness and rigidity are also higher, enhancing durability.

High precision

It uses advanced machinery and equipment and processes in the production process, effectively controlling the size and shape accuracy of the steel, making the product surface smooth, not easy to produce burrs and cracks, very suitable for the manufacture of high-precision parts.

Excellent toughness

The surface and internal organizational structure of this steel bar is more dense, avoiding the hardening phenomenon that may be caused by thermal tensile, so cold drawn bars have better toughness and higher impact strength.

Corrosion resistance and no crack

After special treatment, its surface is smooth and smooth, not easy to produce rust and oxidation, and has good corrosion resistance, thus extending the service life of building materials. At the same time, because there is no need for heat treatment in the production process, the grain boundary structure of the steel is more uniform, and the generation of cracks is effectively avoided.

Good machining performance

It has good machinability and easy machinability, convenient for a variety of machining, stamping, bending and cutting operations, so that it has been widely used in the manufacture of mechanical parts, automotive parts, pipes and bearings and other fields.

Product Process

The production process of Carbon Steel cold-drawn Bar is a precise technology involving multiple steps, aiming to improve the mechanical properties and dimensional accuracy of the material through Cold drawing technology.

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Preparation of raw materials

Material selection: Choose carbon steel materials that meet production requirements (with good machinability and mechanical properties).
Cutting and pretreatment: The selected carbon steel materials are cut to the required length and undergo necessary pretreatment, such as removing surface oxide scale, oil stains, etc., to ensure the quality of subsequent processing.

Heat treatment

Heating: Heat the cut carbon steel to an appropriate temperature to soften the material and enhance its plasticity.
Quenching and tempering: According to specific requirements, the heated material is subjected to quenching and tempering treatment to adjust its hardness and toughness.

Cold drawing processing

Mold design: Design and manufacture suitable cold drawing molds based on the required bar size and shape.
Cold drawing operation: The pre-treated material is drawn through a cold drawing die. During this process, the material undergoes intense plastic deformation, thereby refining the grains, enhancing strength and hardness.
Multiple cold drawing operations: To achieve the required dimensional accuracy and mechanical properties, multiple cold drawing operations are usually required. The cold drawn bars need to undergo necessary annealing treatment to eliminate internal stress and restore the plasticity of the material.

Other processing

Surface treatment: After straightening and cutting, it undergoes polishing, acid washing or sandblasting and other treatments to enhance its surface quality and corrosion resistance.
Inspection and Testing: IBC Group conducts strict inspection and testing on the final products, including dimensional measurement, mechanical property testing, and chemical composition analysis, etc., to ensure that the product quality meets the standards.

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