The sintering density and dimensional shrinkage need to be evaluated under the specified conditions of forming, debinding, sintering and heat treatment, and cannot be compared apart from the specimen and process status.
Engineering focus: Sintered density and shrinkage evaluation
Review the material, particle-size, process and validation factors that matter for this application.
Different objects cannot be directly mixed into a set of specifications.
Density and shrinkage must be explained with process.
A single density number is not enough to judge part quality.
Define test objects
The data should indicate test strips, standard parts, or customer parts, and record material batches, feedstock or pressing conditions, sintering heats, and heat treatment status.
Density and shrinkage are observed together
High shrinkage does not necessarily equate to high density. Local density differences can also cause anisotropic shrinkage and deformation. Density, critical dimensions, porosity and surface should be evaluated together.
Reconnecting mechanics and corrosion resistance
When the project focuses on hardness, strength, elongation, wear resistance or corrosion resistance, the test method and specimen status should be clarified to avoid using industry typical values as a guarantee for a single batch of products.
Discuss your powder project
Share the process step, operating conditions and part result you want to improve.
- Target grade, batch or order information
- Particle size, density, flow or composition items of concern
- Customer inspection methods and receiving requirements
- Packaging, labelling, delivery and traceability needs
Technical references for this page
These references explain materials, processes or test methods. Third-party product data does not represent Tongcheng product specifications.