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本文通过对金属变形时所处的应力状态分析,认为异步轧制时,平均单位压力下降是由于异步轧制改变了变形金属体内的应力状态,使不产生塑性变形的静水压力σ_m 降低的结果。同时分析了摩擦系数对静水压力的影响,摩擦系数越大,σ_m 降低越多。最后指出,无论是采用同步轧制还是异步轧制,使金属发生塑性变形的能量不变。
In this paper, the analysis of the stress state in the deformation of the metal shows that the average unit pressure drop in the asynchronous rolling is due to the fact that the asynchronous rolling changes the stress state in the deformed metal body and reduces the hydrostatic pressure σ_m without plastic deformation. At the same time, the influence of friction coefficient on hydrostatic pressure was analyzed. The larger the friction coefficient, the more the σ_m decreased. Finally, it is pointed out that whether synchronous or asynchronous rolling is adopted, the energy of plastic deformation of metal does not change.