BS EN ISO 3325-1999 不包括硬质合金的烧结金属材料.横向断裂强度的测定

标准号：BS EN ISO 3325-1999
中文标准名称：不包括硬质合金的烧结金属材料.横向断裂强度的测定
英文标准名称：Sintered metal materials, excluding hardmetals - Determination of transverse rupture strength
标准类型：H16
发布日期：1999/9/15 12:00:00
实施日期：1999/9/15 12:00:00
中国标准分类号：H16
国际标准分类号：77.040.10;77.160
适用范围：This International Standard specifies a method for the determination of the transverse rupture strength of sintered metal materials, excluding hardmetals. The method is particularly suitable for comparing the sin-tered strength of a batch of metal powder with that of a reference powder or with a reference strength. The method is applicable to sintered metal materials, excluding hardmetals, whether they have been sub-jected to heat treatment after sintering or not, and also to materials that have been sized or coined after sintering. It is specially suitable for materials having a uniform hardness throughout their section and negligible duc-tility, i.e. a ductility corresponding to a permanent deformation of less than about 0,5 mm measured between the two supports during the transverse rup-ture strength determination. If the test is applied to materials under conditions other than those specified above, the conditions shall be reported. NOTE 1 The permanent deformation can be measured with sufficient precision from the two fragments of the broken or cracked bar by indexing the lower surface. Alter-natively, the deflection of a straight line drawn horizontally on the side of the test piece can be measured using an optical instrument such as a measuring microscope or optical comparator.