Overview
ISO 14168:2011 is an international standard that defines a precise method for testing copper-base infiltrating powders used in powder metallurgy. This standard specifically targets metallic powders, excluding hardmetals, and outlines procedures to evaluate the performance characteristics of copper-based infiltrants when applied in infiltration processes. Published by the International Organization for Standardization (ISO), ISO 14168:2011 provides a comprehensive framework essential for assessing the infiltration efficiency and residue properties of copper-base powders within sintered metallic materials.
Key Topics
- Scope and Purpose: ISO 14168:2011 specifies test methods designed to evaluate copper-base infiltrating powders used to enhance mechanical properties and reduce porosity in sintered metal structures.
- Specimen Preparation: Recommended skeleton specimens are generally iron-base sintered parts with controlled dimensions and density. The infiltrant is compacted from copper or copper-based alloy powders, often mixed with lubricants.
- Test Procedure: Infiltrant and skeleton samples are heated together above the melting point of the copper-base alloy in a controlled reducing atmosphere furnace. Key variables such as temperature, atmosphere, and timing are documented.
- Measurements: Includes weighing specimens before and after infiltration, measuring dimensions, calculating infiltration efficiency, quantifying loose residue, hardness, density, dimensional changes, and transverse rupture strength.
- Calculations: The standard provides formulas to calculate gross infiltration efficiency and residue amount, which are critical performance indicators.
- Reporting: Comprehensive test reports must detail specimen composition, furnace conditions, infiltration efficiency, residue amounts, dimensional changes, hardness, and mechanical properties.
Applications
ISO 14168:2011 is widely applicable in industries and research sectors involved with:
- Powder Metallurgy Manufacturing: Ensuring the quality and performance of copper-based infiltrants in sintered metal parts used across automotive, aerospace, and machinery components.
- Material Development: Helping material scientists and engineers evaluate and optimize copper-base powders for infiltration to achieve desired densities, mechanical strengths, and surface qualities.
- Quality Control and Standardization: Providing manufacturers and testing laboratories with a reproducible and internationally accepted method for assessing infiltrant powders.
- Product Performance Enhancement: Improving structural integrity and reducing porosity in sintered components by selecting appropriate infiltrating powders that meet standardized infiltration efficiency and minimal residue criteria.
Related Standards
ISO 14168:2011 should be used in conjunction with other powder metallurgy and testing standards to fully characterize materials and components:
- ISO 2738: Determination of density, oil content, and open porosity in sintered metal materials (excluding hardmetals).
- ISO 3325: Methods to determine transverse rupture strength of sintered metals.
- ISO 3927: Determination of compressibility of metallic powders.
- ISO 3995: Determining green strength by transverse rupture of rectangular compacts.
- ISO 4492: Determination of dimensional changes during compacting and sintering.
- ISO 4498: Determination of apparent hardness and microhardness.
Incorporating ISO 14168:2011 into the testing regime facilitates the production of high-quality, reliable copper-base infiltrating powders crucial for advanced metallurgical applications.
Keywords: ISO 14168:2011, copper-base infiltrating powders, powder metallurgy, sintered metal materials, infiltration efficiency, metallic powders testing, copper infiltrants, sintered components, powder testing standards, infiltration residue, dimensional change, transverse rupture strength.