1、 Raw material preparation

The main raw material for cold drawn steel is high-quality carbon steel, and the steel ingots are processed through processes such as melting, casting, and forging to obtain formed billets. These billets need to undergo raw material inspection before production to ensure the quality of the steel is qualified.

2、 Blank inspection

The inspection of raw materials mainly includes visual inspection, dimensional inspection, mechanical performance inspection, etc. Visual inspection includes checking for defects such as pits, bubbles, and cracks on the surface, while dimensional inspection is a measurement of the steel size required by the customer to check whether the billet meets the requirements. Mechanical performance inspection includes tensile, bending, impact and other tests to test the hardness, toughness and other properties of the steel.

3、 Blank cutting

Billet cutting mainly involves cutting steel ingots into billets that meet the specified length, which is convenient for subsequent production processes.

4、 Heating of billets

The heating of billets mainly involves heating the billets to a suitable drawing temperature. During the heating process, it is necessary to control the heating temperature and time to ensure the quality of the final product.

5、 Blank perforation

Blank perforation is the process of installing a perforation mold on the head of a blank when it is heated to a suitable temperature, and using a pull rod to pass the blank through the mold, forming a small hole in the head of the blank.

6、 Billet drawing

Billet drawing is one of the most important process links in cold drawn steel, and it is also the core link in the manufacturing of cold drawn steel. The drawing process adopts a continuous drawing method, which improves the surface smoothness and size accuracy of the steel.

7、 Straightening

The steel after drawing needs to be straightened by using an online straightening machine or an up and down straightening machine to adjust the curvature of the steel and make it more straight.

8、 Surface treatment

The surface treatment of steel includes pickling, phosphating, and other processes. Through these treatment methods, the oxide scale, rust, and impurities on the surface of the steel can be removed, resulting in better surface smoothness and increased corrosion resistance of the steel.

9、 Inspection and storage of finished products

After completing the drawing and surface treatment, the steel needs to undergo routine inspection, corrosion resistance inspection, and mechanical property inspection. According to different usage requirements, steel needs to undergo different packaging treatments and be stored in the finished product warehouse for future sales and use.

【 Conclusion 】

Cold drawn steel is an important steel processing method, and its production process includes raw material preparation, billet inspection, billet cutting, billet heating, billet perforation, billet drawing, straightening, surface treatment, inspection, and finished product storage. By providing a detailed introduction to these processes, readers will be able to better understand the production process of cold drawn steel, and thus better use and choose the cold drawn steel that suits them.