Self-lubricated free-cutting steel and method for producing same

Abstract

The invention discloses a self-lubricated free-cutting steel and method for producing same which comprises (by weight percentage) C 0.05-0.5%, Mn 0.6-1.7%, Si 0.03-0.8%, S 0.05-0.4%, Al 0.0005-0.03%, Ca 0.0002-0.006%, O 0.003-0.016%, the rest is Fe and unavoidable foreign substance.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, in particular to the production technology of free-cutting steel. Background technique [0002] With the development of the automobile industry, CNC lathes are increasingly widely used, and the requirements for steel cutting performance, especially the stability of cutting performance, are getting higher and higher. Since the surface machining accuracy of steel can be improved by reducing the cutting feed rate under high-speed and non-lubricated "dry" cutting conditions, so that the cutting process can replace the grinding process and milling process, and as the final machining process of parts, The processing output of auto parts is greatly increased, and the processing cost is greatly reduced. Now CNC lathes have higher integration, automation and processing speed, and WC tools and coated tools such as CBN, TiN and TiAlN are more and more widely used. However, the cutting perf...

AI Technical Summary

Problems solved by technology

It can be seen that since the non-metallic inclusions in the steel have not been effectively controlled, a viscous layer that acts as a lubricant cannot be formed on the contact interface between the tool and the chip during the cutting process to avoid high-temperature chemical damage to the tool. In addition, the hard inclusions in the steel Also caused physical damage to the tool

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