黄培云
黄培云-
基于黄培云粉末压制理论，导出了环形粉末预制坯相对密度沿高度分布计算公式，以及环形粉末预制坯上下端面密度的比值。
Furthermore the calculation formula of density distribution for ring preform is derived based on the Huang 's pressing theory , the ratio of up end density to low end density is calculated , which is useful for technology design of pressing ring preform .