Metal replacement iron reduced iron industry standard reduced iron industry standards

Metal powder-like substance belongs to loose its comprehensive reflection of the performance characteristics of the metal itself, the nature and traits of individual particles and particle groups. The properties of the metal powder is generally divided into chemical properties, physical properties and process performance. It refers to the chemical properties of metal content and impurities. Physical properties include powder has an average particle size and particle size distribution, surface area and powder true density, shape, surface topography and internal microstructure of the particles. Process performance is a combination of properties including flowability of the powder, bulk density, tap density, compressibility, moldability and sintering size change. In addition, for certain special purposes also requires powders with other chemical and physical properties, such as catalytic performance, electrochemical activity, corrosion resistance, electromagnetic properties, the friction coefficient. Properties of the metal powder in the powder production process depends largely on their preparation process. The basic properties of the powder can be used standard test method for determining specific. Determination of particle size and distribution of many, usually sieve analysis (> 44μm), sedimentation analysis (0.5 ~ 100μm), gas permeability, microscopy method. Ultra-fine powder (<0.5μm) measured by electron microscopy and X-ray small-angle scattering. Divided into coarse, medium pink, powder, fine powder and ultrafine powder five levels of the metal powder habits