ｎ值与ｒ值ｎ值又被称为加工硬化指教。用指数表达式表示冷变形强化材料的流动应力σ＿ｓ与断面收缩率间关系时为式中的ｎ称为加工硬化指数或叫ｎ值，可用刚产生缩颈时的断面收缩率来计算：也可用如下图中的式子表示：在深冲零件时，ｎ值大的不会产生皱纹，即铅板的ｎ值增... n value and r value n value is also known as work hardening advice. The exponential expression of the cold deformation of the flow stress σs and cross-sectional reduction of the relationship between the time for the formula n called the work hardening index or n value can be used to produce necking when the reduction of area to calculate the area: can also be used As shown in the following formula: Deep drawing parts, n-value will not produce wrinkles, n-value of the lead plate by ...