ISO 13947:2007 金属粉末 采用粉末锻造试样测定金属粉末中非金属夹杂物的试验方法

标准编号：ISO 13947:2007

中文名称：金属粉末 采用粉末锻造试样测定金属粉末中非金属夹杂物的试验方法

英文名称：Metallic powders — Test method for the determination of non-metallic inclusions in metal powders using a powder-forged specimen

发布日期：2007-02

标准范围

ISO 13947:2007规定了使用粉末锻造试样测定金属粉末中非金属夹杂物含量的金相方法。本试验方法适用于最小横向流动（<；1%）的压制粉末锻造试样。粉末锻造试样的核心区域在放大100倍时不存在可检测到的孔隙。本试验方法也可用于测定粉末锻钢零件的非金属夹杂物含量。然而，在存在大量物质流动的零件中，需要改变近邻分离距离，或者需要调整双方商定的夹杂物尺寸。本试验方法不适用于确定锻造零件的非金属夹杂物水平，因为锻造零件的核心区域含有孔隙。在本试验方法中使用的放大倍数下，残余孔隙度很难与夹杂物区分开来。过多的残余孔隙度使得无法对包裹体总体进行有意义的评估。

ISO 13947:2007 specifies a metallographic method for determining the non-metallic inclusion level in metal powders using a powder-forged specimen. The test method covers repress powder-forged test specimens in which there has been minimal lateral flow (< 1 %). The core region of the powder-forged test specimen contains no porosity detectable at 100X magnification.This test method can also be used to determine the non-metallic inclusion content of powder-forged steel parts. However, in parts where there has been a significant amount of material flow, the near-neighbour separation distance needs to be changed, or the inclusion sizes agreed between the parties need to be adjusted.This test method is not suitable for determining the non-metallic inclusion level of parts that have been forged such that the core region contains porosity. At the magnification used for this test method, residual porosity is hard to distinguish from inclusions. Too much residual porosity makes a meaningful assessment of the inclusion population impossible.

标准预览图