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我们知道较精确地了解组织与性能之间的关系,找出其规律性,来指导实际生产就不能仅仅满足于鉴别组织特征的大致估量,而需要用某些可以测量或计算的参数来确切地表征组织的特点,寻找它们与性能的定量关系。比如,材料实际晶粒大小对强度或韧性的影响很大,而在实际工作中通常采用晶粒度标准进行比较来评定晶粒大小。冶标(YB27-64)规定将晶粒度大小分为8级,用比较法评定晶粒度大小,这种方法不仅精度差,再现性差,而且主观影响大,这样必然影响了晶粒大小与性能关系的准确度,应
We know that a more accurate understanding of the relationship between the organization and performance, to find out its regularity, to guide the actual production can not be satisfied with the general assessment of the organization to assess the characteristics, but the need to use certain parameters can be measured or calculated exactly Characterize the organization, looking for their quantitative relationship with the performance. For example, the actual grain size of the material has a great influence on the strength or toughness, and in practical work, the grain size is usually compared by using the grain size criteria. The standard (YB27-64) provides that the grain size is divided into 8 grades, and the grain size is judged by comparison method. This method not only has poor accuracy and poor reproducibility, but also has a large subjective influence, which inevitably affects the grain size and The accuracy of the performance relationship should be