Studies of Annealing Process in Severely Cold Drawn Pearlitic Steel Wires

Abstract

The effects of spheroidizing annealing process on SWRH72B heavily cold drawn pearlite steel wires were studied and the mechanisms of low-temperature spheroidizing annealing were discussed. The results show that, with increasing drawing strain, the spheroidizing annealing temperature and time decreased and uniformity of the spheroidizing increased; the mechanism of low-temperature spheroidizing annealing was different from the traditional one of heavily cold drawn pearlite steel wires. When the true strains were between 2.85 and 5.1, the spheroidizing process of carbide could be divided into two stages: partial dissolution of lamellar carbide, and the precipitation and accumulation of compulsory dissolved cementite. When the true strains were larger than 5.1, the spheroidizing process of carbide was only characterized by precipitation and accumulation of compulsory dissolved cementite.

Acceleration of Spheroidization in Low‐Density Ultrafine Pearlitic Steel by κ‐Carbide

“…The nucleation and growth of κ-carbides were controlled by the diffusion of carbon and aluminum, which fell under the category of continuous diffusion phase transformation. [8,11] The formula of pearlite lamellar spacing could be expressed as follows [12] :…”

An Empirical Approach for Mechanical Behavior Characterization of a Small Diameter Cold-Drawn Steel Wire with a Three-Point Bending Test

“…Small diameter wires are widely used in several industries. They can be found in semiconductor packaging [1], electrical conducting wires [2], tire cords, springs, wire ropes and suspension bridge cables [3]. They are therefore produced in extremely large quantities in order to meet the demand.…”