粉末烧结板坯轧制致密化理论的探讨——连续压缩平面变形模型
来源期刊：中南大学学报(自然科学版)1985年第4期
论文作者：曾德麟
文章页码：73 - 80
关键词：致密化理论； 粉末烧结坯； 板坯轧制； 摩擦系数； 高密度； 压缩应变； 轧制变形； 延伸应变； 塑性变形； 数值积分
摘 要：本文运用粉末预成形件锻造的屈服条件并引进摩擦系数,导出粉末烧结坯轧制密度与压缩应变的关系满足微分方程[(1/(1+2μ)-0.5ρ1.92)/(1-ρ1.92)ρ]dρ=-dε3。在规定的摩擦系数μ和原始板坯密度ρ0的条件下,用上式的数值积分解可描述轧件密度ρ与应变的关系。讨论了μ和ρ0对密度-应变曲线的影响和压缩变形与延伸变形的关系。
Abstract: A differential eguation given as ting the relationship between densitJ and compressive strain for powder [(1/(1+2μ)-0.5ρ1.92)/(1-ρ1.92)ρ]dρ=-dε3 illustra-sintered slabs during cold-rolling has been derived in the present paper,using the H. A. Kuhn’s yield criterion for the powder preform’s forgingprocess. In the conditions of given values of friction coefficient of μ andinitial density of ρ0, the rolling densities related to various strains can becalculated by numerical integrating above Eg. Discussions were also done,in this paper, on the effects of μ and ρ0 upon the density-strain curves andthe variation of elongate strains with compressive strains.
