1.1 本试验方法包括通过洛氏硬度计测试塑料和相关塑料电绝缘材料压痕硬度的两个程序。 1.2 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 注1: 此测试方法和ISO 2039-2是等效的。本试验方法的程序A相当于ISO 2039-2主体中的试验方法。本试验方法的程序B相当于ISO 2039-2完整附件部分中的试验方法。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 4.1 洛氏硬度值是指当压头上的载荷从固定的小载荷增加到大载荷，然后返回到小载荷时，深度压痕的净增加量得出的值（程序A）。洛氏α（α）硬度值表示当压头上的载荷从固定的小载荷增加到大载荷时，短行程机器从净压痕深度的最大可能剩余行程（程序B）。压头是特定直径的圆形钢球。洛氏硬度数值总是用表示压头尺寸、载荷和所用刻度的刻度符号引用。本测试方法以测试方法为基础 第18页 程序A（第11节）产生了在给定的主要载荷释放到标准的10kg次要载荷后剩余15s的试样压痕。程序B（第12节）在15- s在仍然施加负载的情况下施加主要负载。每个洛氏刻度代表压头0.002mm（0.00008-in.）的垂直移动。在实践中，洛氏硬度值由以下关系式得出: 哪里: 人力资源 = 洛氏硬度值，以及 e = 去除主要载荷后的压痕深度，单位为0.002 mm。此关系仅适用于E、M、L、R和K刻度。 4.2 洛氏硬度值与塑料材料的压痕硬度直接相关，读数越高，材料越硬。α硬度值等于150减去仪器读数。由于程序a中洛氏硬度标度的重叠时间很短，在同一材料上可以获得不同标度上的两个不同刻度盘读数，这两个读数在技术上都可能是正确的。 4.3 对于具有蠕变和恢复的某些类型的材料，施加主要和次要载荷所涉及的时间因素对测量结果有相当大的影响。 4.4 通过这种测试方法获得的结果通常不被认为是对所讨论的塑料材料的耐磨性或耐磨性的衡量。 4.5 压痕硬度被用作某些热固性材料在室温下固化的指示。通常，未固化试样的硬度读数低于正常值。 4.6 每个洛氏硬度标度 表1 是进行中较不严重量表的扩展，虽然相邻量表之间有一些重叠，但不希望使用相关性表。对于这样的表格来说，一种材料的读数可能是令人满意的，但由于弹性、蠕变和剪切特性的差异，无法保证其他塑料材料会给出相应的读数。 （A） 该主要载荷不是车架后部实际重量的总和，而是该载荷的比率，具体取决于机器的杠杆臂。一个品牌和型号有一个25比1的杠杆臂。 4.7 在进行此测试方法之前，应参考被测试材料的规范。材料规范中涵盖的任何试样制备、处理、尺寸和/或试验参数应优先于本试验方法中提及的试样制备。如果没有材料规格，则应用默认条件。

1.1 This test method covers two procedures for testing the indention hardness of plastics and related plastic electrical insulating materials by means of the Rockwell hardness tester. 1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Note 1: This test method and ISO 2039-2 are equivalent. Procedure A of this test method is equivalent to the test method in the main body of ISO 2039-2. Procedure B of this test method is equivalent to the test method in the integral annex part of ISO 2039-2. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 A Rockwell hardness number is a number derived from the net increase in depth impression as the load on an indenter is increased from a fixed minor load to a major load and then returned to a minor load (Procedure A). A Rockwell alpha (α) hardness number represents the maximum possible remaining travel of a short-stroke machine from the net depth of impression, as the load on the indenter is increased from a fixed minor load to a major load (Procedure B). Indenters are round steel balls of specific diameters. Rockwell hardness numbers are always quoted with a scale symbol representing the indenter size, load, and dial scale used. This test method is based on Test Methods E18 . Procedure A (Section 11) yields the indentation of the specimen remaining 15 s after a given major load is released to a standard 10-kg minor load. Procedure B (Section 12) yields the indentation of the indenter into the specimen after a 15-s application of the major load while the load is still applied. Each Rockwell scale division represents 0.002-mm (0.00008-in.) vertical movement of the indenter. In practice, the Rockwell hardness number is derived from the following relationship: where: HR = the Rockwell hardness number, and e = the depth of impression after removal of the major load, in units of 0.002 mm. This relation only holds for the E, M, L, R, and K scales. 4.2 A Rockwell hardness number is directly related to the indentation hardness of a plastic material, with the higher the reading the harder the material. An α hardness number is equal to 150 minus the instrument reading. Due to a short overlap of Rockwell hardness scales by Procedure A, two different dial readings on different scales may be obtained on the same material, both of which may be technically correct. 4.3 For certain types of materials having creep and recovery, the time factors involved in applications of major and minor loads have a considerable effect on the results of the measurements. 4.4 The results obtained by this test method are not generally considered a measure of the abrasion or wear resistance of the plastic materials in question. 4.5 Indentation hardness is used as an indication of cure of some thermosetting materials at room temperature. Generally, an uncured specimen has a hardness reading below normal. 4.6 Each Rockwell hardness scale in Table 1 is an extension of the proceeding less severe scale, and while there is some overlap between adjacent scales, a correlation table is not desirable. Readings on one material may be satisfactory for such a table, but there is no guarantee that other plastic materials will give corresponding readings because of differences in elasticity, creep, and shear characteristics. (A) This major load is not the sum of the actual weights at the back of the frame but is a ratio of this load, depending on the leverage arm of machine. One make and model has a 25 to 1 leverage arm. 4.7 Before proceeding with this test method, reference should be made to the specification of the material being tested. Any test specimen preparation, conditioning, dimensions, and/or testing parameters covered in the materials specification shall take precedence over those mentioned in this test method. If there are no material specifications, then the default conditions apply.