Low-carbon microalloyed free-cutting steel
A free-cutting steel and alloying technology, which is applied to the steel grades of high-end automotive small parts and low-carbon microalloyed free-cutting steels. and other problems to achieve the effect of excellent cutting performance
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[0024] The present invention will be described in detail below:
[0025] Table 1 is a list of values of various embodiments and comparative examples of the present invention;
[0026] Table 2 is a list of mechanical properties and cutting performances of various embodiments and comparative examples of the present invention.
[0027] The embodiments of the present invention are produced according to the following conventional processes:
[0028] Electric furnace (converter) → refining (LF, VD, RH) → continuous casting → (heating) rolling into products;
[0029] Among them, the heating temperature of the billet is controlled at 1150~1250℃, and the holding time is 100~150min; the rough rolling opening temperature is at 1100~1200℃; the finishing rolling temperature is 850~900℃; the hot-rolled bar is pierced after finishing rolling. Water cooling, cooling rate 50~120℃ / min; after bundling, enter the pit and slowly cool to room temperature. The process parameters of each embodiment are arb...
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