Powder Metallurgy Technology
From powder to finished precision parts, explore our complete manufacturing process, inspection capabilities, and GB9-grade gear engineering workflow.
Quick Answer
How does the powder metallurgy process work?
The powder metallurgy process starts with metal powder preparation, followed by compacting in precision tooling, controlled-atmosphere sintering, sizing or machining when needed, and final inspection. This page is designed to answer the process questions buyers, engineers, and sourcing teams usually ask before launching a PM program.
Key Points
- The main process advantage is near-net-shape production with much less waste than subtractive machining.
- Secondary operations such as sizing, machining, heat treatment, or impregnation are added only where function requires them.
- Process selection should be based on part geometry, density target, tolerance, and annual demand.
Related Pages
Manufacturing Process Flow
Powder Compacting
Powder Compaction
Compacting metal powder in precision tooling under high pressure to form green compacts with the target geometry and density.
Sintering
Controlled Atmosphere Sintering
Heating green compacts to high temperature in a protective atmosphere to form metallurgical bonds and deliver the required strength, density, and hardness.
Sizing
Sizing & Coining
Re-pressing sintered parts in precision tooling to improve dimensional accuracy, density consistency, and surface finish.
Machining
Secondary Machining
Precision CNC operations for critical holes, threads, faces, and other features that require tighter tolerances or special geometry.
Heat Treatment
Quenching, Tempering & Carburizing
Improving hardness, wear resistance, and strength through quenching, tempering, carburizing, and carbonitriding processes.
Surface Treatment
Steam, Oil, Plating & Coatings
Steam treatment, oil impregnation, electroplating, and protective coatings improve corrosion resistance, airtightness, and functional performance.
Quality Control Equipment
Our inspection lab combines dimensional, metallurgical, and durability verification to make sure every batch meets customer requirements.
| Equipment Name | Model | Accuracy / Spec | Purpose |
|---|---|---|---|
| CMM (Coordinate Measuring Machine) | Hexagon Global | +/-1 um | Dimensional accuracy inspection |
| Gear Measuring Center | Klingelnberg P-series | 0.5 um | Tooth profile and lead inspection |
| Element Analyzer | Spectro MAXx | 0.001% | Material composition analysis |
| Density Tester | Mettler Toledo | 0.001 g/cm3 | Density and porosity testing |
| Ultrasonic Flaw Detector | Olympus | 0.5 mm sensitivity | Internal defect detection |
| Salt Spray Chamber | Q-FOG | ASTM B117 | Corrosion resistance testing |
Incoming Inspection
Powder composition, particle size distribution, and apparent density checks before production starts.
In-Process Control
Continuous verification of compaction density, key dimensions, and visible defects during production.
Final Inspection
Dimensional, functional, and appearance inspection based on the defined control plan and sampling level.
Shipping Inspection
Packaging, labeling, documentation, and traceability verification before shipment release.
GB9 Precision Gear Manufacturing
We use German KISSsoft gear design software and dedicated measuring centers to achieve GB9-grade gear quality, two accuracy grades above the common GB11 baseline.