What process is used to produce cold-drawn round steel?

Cold-drawn round steel is formed by changing the original yield point of the original steel bar through super tension at room temperature. The process of cold-drawn round steel is implemented by cold extrusion technology and precision abrasive tools. The surface of the drawn product is smooth and bright, and the processing process saves time, materials and mechanical use costs. Let's decorate the net together to explain the key points of making cold-drawn round steel. The drawing of cold-drawn round steel in cold-drawn round steel process is mostly completed by two cold-drawn steel bars. In the first cold drawing process, with the increase of tensile stress, plastic deformation will gradually occur inside the steel bar. When the second cold-drawn round steel bar is pressed again, the plasticity of the steel bar will become smaller, the hardness will increase, and the strength will increase, showing deformation and hardening.

The process control of cold-drawn round steel, in the manufacturing process of cold-drawn round steel, only controls the cold-drawn rate or stress, which is called single control; Cold drawing speed and cold drawing stress are controlled at the same time, which is called double control. Although the single control of cold drawing is simple and convenient, it is easy to break the uneven steel bars, and the quality of cold drawing cannot be guaranteed. Double control operation can avoid the above problems, but in the manufacturing process of cold-drawn round steel, it is required to control the stress and cold-drawn rate, and if it exceeds the allowable value, it will be unqualified. Cold drawing stress control. Cold-drawn round steel used as prestressed reinforcement should be controlled by cold-drawn stress. After cold-drawn steel bars, when the maximum cold-drawn rate exceeds the specified range, it is necessary to re-test the mechanical energy of cold-drawn round steel. Control of cold drawing rate measurement. The value of cold drawing rate can be determined by many experiments. The operator uses the same batch of steel bar specimens in the same furnace to carry out cold drawing stress according to the specification, and then obtains the corresponding cold drawing rate, and then takes its average value as the actual cold drawing rate controlled by this batch of cold drawn round steel. When the steel bar strength is high and the average cold-drawn rate is lower than 1%, the cold-drawn rate of cold-drawn round steel should still be controlled according to 1%. Cold-drawn round steel can produce products with different shapes, specifications and tolerances, and the tolerances are kept to a minimum through high-quality cemented carbide abrasives. In addition, compared with the materials consumed by traditional lathe processing, cold-drawn round steel can save a lot of materials.