烧结金属材料 不包括硬质合金 无缺口冲击试验片

[中文适用范围]： 本文件规定了烧结金属材料无缺口冲击试件的尺寸。试件可通过压制和烧结或机加工烧结件直接获得。本文件适用于所有烧结金属和合金，硬质合金除外。但是，对于某些材料（例如，孔隙率低的材料或延展性高的材料），使用缺口试件可能更合适，在这种情况下，结果的离散性较小。（在这种情况下，请参阅 ISO 148-1。）注：对于多孔烧结材料，根据本标准对无缺口试样进行冲击试验获得的结果与对缺口试样进行固体金属试验获得的结果不完全可比。 [外文原描述]： This document specifies the dimensions of an unnotched impact test piece of sintered metal materials. The test piece may be obtained directly by pressing and sintering or by machining a sintered part. This document applies to all sintered metals and alloys, with the exception of hardmetals. However, for certain materials (for example, materials with low porosity or materials with high ductility), it may be more appropriate to use a notched test piece which, in this case, will give results with less scatter. (In this case, refer to ISO 148-1.) NOTE For porous sintered materials, the results obtained from impact tests on unnotched specimens according to this standard are not fully comparable with results obtained from tests on solid metals tested on notched specimens.