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 is described in detail below:
[0025] Table 1 is the value list of each embodiment of the present invention and comparative examples;
[0026] Table 2 is a list of mechanical properties and cutting properties of each embodiment of the present invention and comparative examples.
[0027] Each embodiment of the present invention is produced according to the following conventional processes:
[0028] Electric furnace (converter) → refining (LF, VD, RH) → continuous casting → (heating) rolling;
[0029]Among them, the heating temperature of the billet is controlled at 1150-1250°C, and the holding time is 100-150min; the starting temperature of rough rolling is 1100-1200°C; the finishing rolling temperature is 850-900°C; Water cooling, the cooling rate is 50-120°C / min; after being bundled, it is put into the pit and slowly cooled to room temperature. The process parameters of each embodiment are arbitrarily selected within the stated range.
[0030...
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