Meaning
Simultaneous application of high temperature and high gas pressure is a consolidation technology used to produce fully dense hardmetals and ceramics. Through sinter hip processing, manufacturers eliminate residual porosity in tungsten carbide parts by applying pressurized argon gas during the liquid phase sintering stage. This method produces materials with uniform microstructures and superior mechanical properties.
Process Mechanism
Heating the compacted powder to the liquid phase temperature initiates the sintering stage, which is followed by the introduction of gas pressures up to one hundred bar. This phase of sinter hip processing forces the remaining microscopic voids to collapse and weld shut under the combined action of heat and pressure. The gas is removed before the cooling cycle begins.
Structural Enhancement
Internal defects and microvoids are virtually eliminated, resulting in a material that approaches its theoretical density. Utilizing sinter hip processing increases the transverse rupture strength of the alloy. It also reduces the statistical variation in material properties, which makes the components more predictable in service.
Commercial Benefit
Component lifespans in demanding applications like metal forming and mining are extended. This durability reduces the downtime associated with tool replacement, lowering the overall cost of operation for the end user.