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随着农业合作化高潮的到来,各钢铁工业部门生产农具钢的任务也随之更加艰巨.特别是1956年第一季度,很多轧钢厂都生产双输双铧犂上用的一个重要零件“犂铧钢”.它的形状如图1所示.犂铧钢是属于复杂断面及不对称断面钢材的一种.拟定轧制这种钢材的合理孔型设计有着一系列的困难,如在闭口孔型内轧制时,必须精确地调整,否则,就会产生不满及过充满的现象,以致在下一孔内变成折叠.为了能获得所要求轧件之最终尺寸,断面上的金属变形,在接近成品时应比较均匀.
With the climax of agricultural cooperation, the tasks of the steel industry in the production of agricultural implements steel have become more arduous, especially in the first quarter of 1956 when many rolling mills produced an important part for the double-plow and two-plow plow. Plowshare steel. "Its shape is shown in Figure 1. Plowshare steel is a complex cross-section and asymmetric section of a steel .To develop the reasonable design of this type of steel rolling has a series of difficulties, as in In closed-hole rolling, it must be precisely adjusted, otherwise, it will produce dissatisfaction and overfilling phenomenon, so that the next hole into a fold in order to obtain the required final size of the rolling, the deformation of the metal section , Near the finished product should be more uniform.