Using HIP technology after vacuum sintering, tungsten carbide buttons will be harder, tougher and have good wear resistance and anti-corrosion. However, it costs too much to popularize. With the rapid development of technology, low pressure hot isostatic pressing appeared in the 1980s, which was based on HIP and made some improvements, It has lower pressure than HIP and combines sintering with other processes. It not only reduces the cost, but also remarkably improving the properties of tungsten carbide nozzle. In addition, low pressure hot isostatic pressing is widely used in wolfram (W), molybdenum (Mo), titanium (Ti) and some other refractory metals.
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