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1.前言在钢材轧制过程中,导板的工作条件相当恶劣,①它与热钢坯产生滑动摩擦,使表面温度迅速升高。曾对φ300复二重式线材轧机进口导板(K13)的工作温度进行测量,从导板背面打孔至工作面不同深度,用电容放电法将φ0.5mm镍铬—镍硅热电偶焊入孔底并封死,用电位差计记录。当钢坯温度为950～1000℃。轧制速度为1.5m/s,每根钢坯重120kg,通过导板时间为0.5min时。测得导板工作面1mm内最高温度达700～720℃。因此要求材料具有良好的抗氧化性能。②钢坯氧化铁皮的剥落和破碎在导板之
1. Introduction During the steel rolling, the operating conditions of the guide plate is rather poor, ① it produces sliding friction with the hot billet, so that the surface temperature rises rapidly. Had φ300 complex double wire rod mill inlet guide (K13) operating temperature was measured from the back of the guide plate to the working face of different depth drilling, the capacitor discharge method φ0.5mm nickel-chromium - nickel silicon thermocouple welded into the bottom And sealed, with potentiometer records. When the billet temperature is 950 ~ 1000 ℃. Rolling speed of 1.5m / s, each billet weight 120kg, through the guide time of 0.5min. The maximum working temperature of 1mm in the guide plate is 700 ~ 720 ℃. Therefore, the requirements of the material has good oxidation resistance. ② billet oxide scale peeling and broken in the guide plate