SURFACE CRACK REDUCING METHOD ON FE-CR-AL ALLOY ROLLED BILLETS

摘要

The present invention in reducing surface cracks in the rolling of billets how to improve the quality while increasing the pre-existing material, reducing the billet surface cracking occurring in the billet correction process, and thus the pre-existing production yield in Fe-Cr-Al-based pre-existing production It relates.; The present invention in weight percent: C: 0.02% or less, Si: 0.18% or less, Mn: 0.16% or less, P: 0.021% or less, S: 0.0039% or less, Cr: 14.16-14.18%, Al: 3-4%, Ti: 0.1%, and Ni: contained, and the balance Fe and other consists of which inevitably contained impurities, the total concentration of interstitial elements (C + N) refractory die reinforcement wire material for a concentration of not more than 0.03% of the 0.14% after being such that 0.15-0.3% of Ti in the composition for the material in addition to the addition of Ti and producing the ingot, reheating the ingot to the billet in more than 1100 ℃ 850-900 ℃ bungoe rolling is complete, the surface temperature of the billet chromium-reducing surface cracks of the aluminum-based rolled billet iron was no process of air-cooling to room temperature while the surface temperature of not less than 400 ℃ complete the surface grinding of billets were charged into a straight wire rod rolling, characterized in that to produce the wire there is provided a method.