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鞍钢中板厂2300轧机的压下梯形丝在轧制中要承受1200t 的轧制力,同时还要承受钢坯轧制时的冲击载荷1500t,因此常常使梯形丝与丝母研住。如果梯形丝热处理渗碳后较硬时,在螺纹部位出现横向折断和顶头开裂;较软时,顶头部位磨秃,控制失灵,严重影响产品质量。如出现上述情况,就得停产检修。每次更换一套梯形丝与丝母至少需要2～3h,这样的事故几乎每年都要发生2～3次。
Anshan Iron and Steel Mills 2300 Mill rolling down the trapezoidal wire in the rolling to withstand the rolling force of 1200t, but also to bear the impact load when rolling billet 1500t, it is often so that the trapezoidal wire and silk mother live. If the trapezoidal wire after heat treatment carburizing harder, there are horizontal fracture in the threaded parts and head cracking; softer when the head parts wear bare bald, control failure, seriously affecting product quality. In case of the above situation, you have to stop production and overhaul. Each change a set of trapezoidal silk and silk nut at least 2 ~ 3h, such accidents occur almost every year 2 to 3 times.