Ultra-fine tungsten carbide rod extrusion forming agent was first invented by the Germans, then carbide major foreign companies and research institutions have developed a number of distinctive forming agent system generally contains three component composite components, namely plasticized component, adhesive component and activator component.
These three groups according to the ratio of the specific elements of each group element alloy billets for extrusion rheological properties, removal of the impact of behavior to determine. The billet extrusion process, the plasticizing component billet movement plays a leading role; adhesive component can form a network backbone, that is, when after the removal of plasticizing component, the adhesive component support billets shape; activation component and a powder-forming agent can enhance adhesion between.
Ultra-fine tungsten carbide rod extruded agent design principles are:
(1)Group element does not occur between the chemical reaction;
(2)Plasticizing component primarily consider the removal characteristics, the use of low molecular weight substances;
(3)Consider adhesive component should have a certain flexibility and elasticity, the use of polymers;
(4)Activation group element in the tungsten carbide rod extruded from between the wetting agent and powder, linking effect, the use of low molecular weight organic substances;
(5)Mixed among each group element, and can be fused to each other;
(6)Each component should be a simple structure, less residue after removal;
(7)Non-toxic, non-corrosive, does not constitute environmental pollution, not explosive;
(8) abundant supply and low prices.
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