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Wiredrawing mold's material quality
Has undergone several dozens year development, presented the new wiredrawing mold material quality. According to the material category, may divide into the wiredrawing mold the alloy steel die, the hard alloy mold, the rough diamond mold, the crystal combination diamond mold, the CVD diamond mold and the ceramic mold and so on many kinds. In recent years the new material's development enormous has enriched the wiredrawing mold's application scope and enhanced the wiredrawing mold's service life.

　 1) the alloy steel die is the early wiredrawing mold manufacture material. Uses for to make the alloy steel die's material is mainly the ordinary tool steel and the alloy tool steel. But because alloy steel die's degree of hardness and the resistance to wear are bad, the life is short, cannot meet the modern production need, therefore the alloy steel die is eliminated very quickly, did not look at the alloy steel die nearly in the present production processing.
   2) the hard alloy mold is made by the hard alloy. The hard alloy belongs to the tungsten cobalt class alloy, its principal constituent is the tungsten carbide and the cobalt. The tungsten carbide is the alloy “the skeleton”, is main the hard wear-resisting function; The cobalt cakes the metal, is the alloy tough origin. Therefore, the hard alloy mold and the alloy steel die compare have the following characteristic: The resistance to wear is high, the polishability is good, the coherence is small, the friction coefficient is small, the energy consumption is low, the corrosion resistance can be high, these characteristics enable the hard alloy wiredrawing mold to have the widespread processing compatibility, becomes applies most wiredrawing mold mold now.

　 3) the rough diamond is the carbon allotropes, manufactures the mold with it to have degree of hardness to be high, resistance to wear good and so on characteristics. But rough diamond's brittleness is big, difficult to process, generally uses in making the diameter 1.2mm following wiredrawing mold. In addition, the rough diamond price is expensive, the source of goods is scarce, what therefore the rough diamond mold is not the people seeks finally is the economy the practical wiredrawing tool.

　　4) the crystal combination diamond is with undergoes the earnest choice the quality fine artificial diamond monocrystal to add on few cements and so on silicon, titanium, gets together under the high temperature high pressure's condition becomes. Crystal combination diamond's degree of hardness is very high, and has the very good resistance to wear, compares it with other materials to have the unique merit: As a result of rough diamond aeolotropy, in drawing process, when entire hole's periphery occupies under the active status, the rough diamond will occur in hole some position wears according to qualification; But the crystal combination diamond belongs to the polycrystal, to have the isotropic characteristic, thus avoided the nib wearing non-uniform and the nib not round phenomenon occurrence. Compares with the hard alloy, the crystal combination diamond's tensile strength is only the commonly used hard alloy 70%, but compared to hard alloy hard 250%, like this, enables the crystal combination diamond mold to have more merits compared to the hard alloy mold. The wiredrawing mold wear-resisting performance which makes with the crystal combination diamond is good, in the hole attrition is even, anti-impact ability, the wiredrawing efficiency is high, moreover price compared to rough diamond cheap many. Therefore the present crystal combination diamond mold applies widely in the wiredrawing profession.

　 5) CVD (chemistry gas phase sedimentation) the coating wiredrawing mold is a new technology which recently developed, its main method is on the hard alloy wiredrawing mold the coating diamond thin film. The diamond thin film is the pure diamond polycrystal, it both has the unit crystal diamond smooth finish, the heat resistance, and has crystal combination merits and so on diamond resistance to wear and low in price, is replacing the rare rough diamond preparation wiredrawing mold tool aspect to make the very good progress, its widespread use will bring the new vigor for the wiredrawing mold profession.

　 The high performance ceramic material has degree of hardness to be high, the resistance to wear is good, the chemical stability is strong, the high temperature mechanical properties fine and have characteristics not easily and so on caking with the metal, but widely applies in difficultly to process the material the processing.

　　For 30 years, because has realized in the ceramic material fabrication technology to raw material purity and the grain size active control, has developed each kind of carbide, the nitride, the boride, the oxide compound, the whisker or the few metal increase technology. As well as uses many kinds of plasticizing reinforcement mechanism and so on, enabled the ceramic material the intensity, toughness, the anti-impact properties to have enhanced greatly.

　　The commonplace outside findings looked that the ceramic material has widely applied in the mold domain, in countries and so on Japan, US, France had many patents. Although the present ceramics wiredrawing mold had not obtained the widespread application in our country, but along with technique of manufacture's unceasing enhancement, the ceramics will be suits the wiredrawing industry the good wiredrawing mold material.

　　Moistens the unlined upper garment silk mold to have the adherency not easily in the drawing process with the metal wire rod, is advantageous in enhances the tinsel material surface performance, particularly under high temperature drawing colored flinty material (for example W, Mo silk and so on). Draws the non-ferrous metal material quality with the ceramic wiredrawing mold to be possible to avoid the hard alloy wiredrawing mold's flaw, and may lengthen the wiredrawing mold life, enhance the material quality the surface quality.