标准摘要
[中文适用范围]： ISO 4499的本部分规定了硬质合金中孔隙、游离碳和eta相的出现、类型和分布的金相测定方法。 [外文原描述]： ISO 4499-4:2016 specifies methods for the metallographic determination of the presence, type, and distribution of porosity, uncombined carbon and eta-phase in hardmetals.
英文名称Hardmetals — Metallographic determination of microstructure — Part 4: Characterisation of porosity, carbon defects and eta-phase content