The steel wire is tempered using a medium frequency induction heating power supply. How to determine the tempering tension value?

When tempering heat treatment of steel wire using medium frequency induction heating power supply, there are many factors that affect the tempering quality, such as tempering temperature, tempering time, tempering tension value, etc. Therefore, it is necessary to choose the appropriate tempering temperature, tempering time, The tempering tension value is very important. Today, the editor will tell you how to determine the tempering tension value of steel wire.

The stabilization treatment of prestressed steel wire is carried out when the steel wire is subjected to a certain tensile stress. Therefore, after the tempering temperature is determined, the tempering tension value of the steel wire should be selected. The principles for selecting tension values are as follows.

(1) The relationship between the tension value and the tempering temperature is inversely proportional to the tension applied by the steel wire and the tempering temperature. When using medium frequency induction heating power supply for tempering heat treatment, the tempering temperature is high, the selected tension is small, and the tempering temperature is low, the selected tension is large. The relationship between tempering temperature and tension is controlled by the elongation or plastic deformation of the steel wire.

(2) The relationship between the tension value and the diameter reduction rate of the finished steel wire is directly proportional to the tempering tension applied to the steel wire and the diameter reduction rate of the finished steel wire. The greater the diameter reduction rate, the greater the stress exerted. Usually the diameter reduction rate of the finished steel wire is controlled at 0.5%-0.7%.

The tempering tension value is selected based on the above principles. The tension value is usually taken as 35%-48% of the tensile strength of untreated steel wire at room temperature, which is equivalent to the stress at an elongation of 1%-1.5%.

This article briefly introduces how to determine the tempering tension value of steel wire during induction heating and tempering heat treatment. I hope it can be helpful to your heat treatment work. If you want to know about its specific tempering heat treatment process, you can consult our technical staff or relevant professionals.