Cold drawn round steel is a steel that produces a certain plastic deformation through cold working, thereby increasing its yield point, strength and hardness. But in the process, its plasticity and toughness will be reduced. It has the advantages of smooth surface, high dimensional accuracy and strong mechanical properties.
It has a wide range of applications, such as mechanical pin, auto parts, hardware parts, home appliance parts and other fields. Its common materials are carbon steel, high quality carbon steel and alloy steel. Its specifications are generally 3mm-100mm.
Manufacturing Process 1
1. Raw material preparation: Select qualified billets as raw materials to ensure that the chemical composition and mechanical properties of the billets meet the standard requirements. Check the surface of the billet to ensure that there are no cracks, inclusions and other defects.
2. Heating treatment: Workers put the billet in the heating furnace, heating to the appropriate temperature, can obtain good plasticity and deformation ability. Control the heating temperature and heating speed to avoid overburning and oxidation of the billet.
3. Rolling process: Put the heated billet into the rolling mill, and through the extrusion of the roll. The billet will undergo plastic deformation and gradually form round steel. Control rolling temperature and rolling speed to obtain suitable round steel size and surface quality. In the rolling process, timely adjust the roll gap and rolling force to ensure that the diameter and roundness of the round steel meet the requirements.
Manufacturing Process 2
4. Cooling treatment: After the rolling is completed, the round steel is naturally cooled or water-cooled to obtain the required organization and properties.
Control the cooling speed and cooling medium to avoid problems such as supercooling and cracking of round steel.
5. Straightening and cutting: the cooled round steel is straightened to eliminate bending and distortion. Use a cutting machine to cut round steel to the required length to meet the requirements of use.
6. Inspection and packaging: Quality inspection of the completed cold-drawn round steel, including size, appearance, chemical composition, mechanical properties and other aspects of testing.
After ensuring that the quality of the round steel meets the relevant standards and customer requirements, the workers will pack it to prevent damage during transportation.
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