Sintering a furnace involves compacting and forming a solid mass of material using heat or pressure without melting it to the point of liquefaction.
This process is commonly used with metals, ceramics, plastics, and other materials to enhance their mechanical properties.
4 Key Steps Explained
1. Preparation
Before sintering, the pressing lubricant must be removed by evaporation.
Surface oxides from the powder particles in the compact must also be reduced.
These steps are typically achieved in a single, continuous furnace by carefully selecting and zoning the furnace atmosphere.
An appropriate temperature profile throughout the furnace is also crucial.
2. Sintering Process
Once the precursors are met, the formed metal is placed into a sintering furnace.
The furnace temperature and time depend on the material and the required density.
Sintering is usually done in a belt conveyor, push, or batch furnace within a carefully controlled atmospheric environment.
During sintering, the metal particles bond together, creating a stronger and more rigid metal form.
Some slight shrinkage may occur during this time, which designers must account for in the initial design.
3. Cooling
After sintering, the properties of the part can be adjusted by controlling the rate at which the part cools.
This step is crucial as it can significantly affect the final mechanical properties of the material.
4. Importance of Sintering
The sintering process is a crucial step in the manufacturing of many materials.
It allows for the creation of finely-tuned compact metal products with elements featuring extreme melting points.
The process is carefully controlled to ensure the desired properties are achieved in the final product.
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