A kind of low-carbon aluminum killed cold heading steel and production method thereof

Abstract

The invention relates to the technical field of metallurgy, and specifically discloses a low-carbon aluminum-killed cold heading steel and a production method thereof. The composition of the cold heading steel is: C 0.06~0.09%, Mn 0.30~0.50%, Si 0.03~0.06%, P≤0.015%, S≤0.010%, Al 0.020~0.040%, the balance is Fe and unavoidable The low-carbon aluminum-killed cold-heading steel is prepared through steelmaking, continuous casting, hot-rolling and spinning processes. The present invention makes the mechanical properties of the prepared cold heading steel satisfy the tensile strength Rm≤450N / mm through composition adjustment and process optimization 2 , the shrinkage rate Z≥70%, the cold heading steel produced fully meets the requirements of use, and has stable mechanical properties, which can be popularized and used on a large scale.

Description

Technical field

[0001] Technical Field The present invention relates to metallurgy, particularly to a low carbon aluminum killed cold heading steel and production method. Background technique

[0002] Cold heading steel into a room temperature steel, capable of withstanding the temperature at one or more impact load, are widely used in the production of screws, pins, nuts and other standard parts for the automotive, construction, machinery, electronics, light steel , construction and other industries. With the rapid development of modern industry, cold heading steel of increasingly high performance requirements, at the same time, cold material will be locally significant deformation, in order to prevent substandard products, the production process to ensure the smooth, cold heading steel must have sufficient plastic properties, good surface quality and homogeneous organization. In order to improve the plasticity of steel, the silicon content of the steel are limited in order to i...

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