標準號：BS EN ISO 3325-1999
中文標準名稱：不包括硬質(zhì)合金的燒結(jié)金屬材料.橫向斷裂強度的測定
英文標準名稱：Sintered metal materials, excluding hardmetals - Determination of transverse rupture strength
標準類型：H16
發(fā)布日期：1999/9/15 12:00:00
實施日期：1999/9/15 12:00:00
中國標準分類號：H16
國際標準分類號：77.040.10;77.160
適用范圍：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.