Zhuzhou Huijin Cemented Carbide Co., Ltd.  

Product Name: Tungsten Carbide Bits Buttons for Mining Model NO.: M-001 Material: Tungsten Carbide Manufacturing Process: Powder metallurgy Surface Treatment: Polishing Hardness: >90 Hra Trademark: zzhuijin Transport Package: Cartons or Wooden Cases Specification: standard or customized Origin: China HS Code: 8209002100 Product Description TungstenCarbide BitsButtonsforMiningWe have a verity of types of carbide button, such as spherical buttons, ballistic buttons, conical buttons, wedge buttons, wedge crested chisel, wing tip, spoon buttons, flat-top buttons, serrated buttons, sharp claw, auger tips, road digging buttons and so on.Tungsten carbide button is widely used in petroleum drilling, snow plow equipment, cutting tools, mining machinery, road maintenance and coal drilling tools.It is also can used as excavating tools for Tunneling, quarrying, mining and Construction. In addition, it can be applied as drill accessories for rock drilling machine and deep hole-drilling tools.They have good impact toughtness and excellent wear resistance.Recommend grade list of tungsten carbide buttons:GradeDensity(g/cm3)T.R.S(MPa)Hardness(HRA) Application recommended YG6 14.95 ≥1900 ≥90.5For coring crowns,electric coal drill bits,coal cutting picks,oil cone bits and scraping knife bits,used in geological prospecting,coal mining and oil well boring.YG814.80≥2200≥89.5Used as a core drill, electric coal drill, coal cutter tooth, oil roller bit and scraper button bit.YG8C14.80≥2400≥88.5Mainly used for small and medium-sized drill bit tooth, and as a rotating exploration drill bush.YG11C14.40≥2700≥86.5Most used in the drill bit and rock bit used for cutting high hardness materials ball tooth.YG13C14.2≥2850≥86.5mainly used for rotary drill bit used for cutting high hardness materials in ball mill.YG15C14.0≥3000≥85.5Used in oil cone bit and soft in the hard rock digging cutting tools.YK0514.8≥2500≥90.5Mostly used as the buttons of small and mediumsized bits to cut soft and medium hard formationsYK1514.6≥2450≥87.6Suitable to strips,conical buttons for rotary percussion-resistant geological prospecting buttons,cut soft and medium hard formations.YK2014.4≥2500≥86.8Primarily for the buttons and inserts of rotary percussion bits to cut medium-hard and very hard formations,YK2514.4≥2550≥87.2Primarily for the buttons and inserts of rotary percussion bits to cut medium-hard,hard,and very hard formations.Carbide productionThe productionprocess of powder-metallurgical products basically includes the four steps of powder preparation, forming, sintering andfinishing.Tungsten carbide productionThe APT (ammonium para-tungstate) is calcined into tungsten oxide under high te-mperature. Subsequently the oxide is reduced to tungsten metal in a hydrogen atmosphere. The metal powder is then mixed with carbon and carburised underinert atmosphere at high temperatures. The production parameters are decisive for the WC grain size in the sintered carbide.Powder preparationThe tungsten carbide is intensely mixed with the binder metalcobalt, nickel or iron, various grain growth inhibitors and materials,which promote compaction, by wet grinding so that ahomogeneous suspension is created. Afterwards, the suspensionis dried in a spray tower to produce a granulate with goodflow characteristics. This granulate represents the basis for allforming processes.metal formingThe objective of the forming process is to obtain a near netshape sample. Pressing is normally carried out at room temperaturewith pressures reaching up to several tons per squarecentimetre.There are several ways of pressing blanks:During isostatic cold pressing the powder is filled into an elasticflexible hose and pressed into a compacted form throughhigh liquid pressure. The powder blocks which are producedin this way can then be processed mechanically. All commonmachining methods like milling, cutting, drilling or turning maybe applied.In uniaxial pressing the pressing tool consists of a die and anupper and a lower punch. The carbide powder is filled into thedie and then compacted to create the so called green carbide,which is ejected from the pressing die.Extrusion pressing is mainly used to produce rectangular baror cylindrical rod, with or without axial hole(s). A plasticiser isadded to the powder. The resulting paste is pressed throughan extrusion nozzle. Before sintering, the plasticiser must beevaporated in special drying furnaces.metal Injection Moulding (MIM) is a process used to producemore complex forms which cannot be produced by directpressing. The paste preparation is similar to the extrusionprocess.Sintering processThe sintering process converts the blank into a homogeneousand dense carbide with a high level of hardness. The materialis sintered at temperatures between 1,300 and 1,500 °C(liquid phase sintering) and sometimes also at high pressure(up to 100 bar). The volume is reduced by up to 50 % duringthis process.FinishingIn order to achieve the final requirements of surface finish, tolerances,etc. carbide parts can be subjected to a series of finishingprocesses such as grinding, spark erosion and coating.Zhuzhou HuijinCemented carbideCo., Ltd is located in Zhuzhou City, Hunan Province, China, where is the largest tungsten carbide producing area in China.Our mainpr-oducts inclue: Tungsten carbide rods, carbide strips, carbide dies and bushes, tungsten carbide roll rings, carbide disc cutters, carbide end mill cutters, carbidestud and pins, tungsten water jet cutters, precision tools, tungsten carbide grits and powder, welding rods, ceramet inserts, PCD and CBN tools, non-standard and deep-processing products and so on. We also provide very good quality of boron carbide, silicon carbide nozzles.Technology and Quality creates a bright future.Looking forward to your cooperation!Our company gathered the professional staff members for designing, producing and saling. Our workers are well trained and experienced. Our team is honest, positive, keeping promise, working hard and carefully. We sincerely hope we can provide our clients with good quality, moderate price together with professional service. We have advanced equipment, test facilities and professional employees. We strictly carry on ISO9001: 2008 requirements to guarantee the quality.