ISO 2039-2-1987 Plastics; Determination of hardness; Part 2 : Rockwell hardness

ISO 2039-2-1987塑料.硬度的测定.第2部分:洛氏硬度

样品：最小24×60mm平面,厚度至少为6mm

周期： 7~9个工作日

Abstract

Specifications of a method for the determination of the indentation hardness of plastics by means of the Rockwell hardness tester using the Rockwell M, L and R hardness scales. The Rockwell hardness number is derived from the net increase in depth of impression as the load on an indentor is increased from a fixed minor load to a major load and then returned to the same minor load. For materials having high creep and recovery, the time-factors involved in application of the major and minor loads have a considerable effect on the results of the measurements.

各种规格的塑料通过使用罗克韦尔 M、 L 和 R 的硬度标度的洛氏硬度计的压痕硬度的测定方法。洛氏硬度值推导出深度的印象的净增加作为压头上的负载是从固定的次要负荷增加到主要的负荷，然后返回同一小负荷。材料有高的蠕变和恢复，时间因素涉及在应用程序中的主要和次要负荷有相当大的影响的测量结果。