Crusher Hammer

In the sinter and molding process of the carbide button, the cooling speed of a vacuum furnace slowed down after the alloy of the product is finished.HPGR pin stud is subject to deep cold treatment in liquid nitrogen for 6 hours. The hard alloy carbide pin is restore to the normal temperature in a natural state, the temperature in the furnace raised to 400 degree C, and the hard alloy studs are subjected to temper heat treatment to improve the crystal image structure of the metal cobalt.Ball mill and polishing for 3 hour to eliminate the residual stress of the hard alloy stud.

Tic is added in the sintering process of the cemented carbide, so that the stability of the cemented carbide pin stud can be enhanced, and the grain size of the cemented carbide can be restrained. The carbide of titanium rapidly reacts with the residual oxygen and nitrogen in the vacuum during the high-temperature sintering process to form a titanium carbonitride compound, so that the sintering atmosphere of the product in the vacuum furnace can be ensured, and the HPGR Hard Alloy Pin has a better sintering atmosphere in the sintering furnace. Inhibit the growth of crystal grains of the hard alloy product, ensure the alloying process of the hard alloy and improve the quality stability of the product.

In order to improve the strength of cemented carbide, the following methods are usually adopted:W and Ti, V, Ta, Re and other alloy elements are alloy or prepared into a tungsten-based high-entropy alloy; that toughness is improved through the control of ultrafine crystal and nanocrystalline microstructures; and oxide particle (niobium oxide) or TiC are introduced into the tungsten-based material for dispersion strengthening, and then fiber reinforcement is carried out for toughening.In these methods, niobium oxide dispersion strengthens the grain structure, which has obvious effect on improving the high-temperature strength of tungsten and the recrystallization of internal crystal structure, strengthening the high-temperature performance of cemented carbide and improving the strength of cemented carbide.