Stalk is the pipe fitting which transports aluminum liquid to the die cavity in the process of aluminum alloy die-casting. The advantages of Si3N4 material are as follows:

l Si3N4 has better thermal shock resistance and high temperature mechanical strength, and the strength will not alter at the 800°degree or other molten metal. If preheated at the time of use, it will get the best effect.

l Low-wettability of molten aluminum can reduce the adsorbates and slag on the tube, making it easier to do the daily maintenance.

l Si3N4 material has low heat conduction and superior heat preservation performance, preventing from heat loss.

l Due to its excellent corrosion resistance and low wettability, the tube can stand repeat washing of molten aluminum or other molten metal.

l With good high-temperature mechanical strength, corrosion resistance and low wettability, the Si3N4 material can protect the normal working of heater element in the tube for a long time. If proper maintenance, the actual using life can be up to 2-3 years.