Basic Info.
Surface Treatment
Without Processing
Manufacturing Process
Powder Metallurgy
Material
Tungsten Carbide
Application
Shield Machine, Urban Subway Engineering
Name
Carbide Shield for Tunnel Boring Machine
Grade
Yg4 Yg13c Yg11c Yg115c Yg20
Specification
standard or customized
Product Description
Tunnel Boring Machine Carbide Plate Tbm Cutter Made in China
Carbide TBM Drill Bits
Shield machine of Tunnelling tool is a kind of advanced equipment for underground tunnel construction, This equipment can do the field operation that not affect any construction on the ground. This is available and best choice for crowd city areas, Protect buildings or historic site on the ground.
There have a very big circle blade in the front of shield machine, We have mounting various kind of cutters on the blade, In order to promote stable and long life time of application, We have research and developed special tungsten carbide materials that mainly suitable for tunnel borer machine: With high impact toughness, high abrasion resistance, stable physical ability, wide application field, The appearance of fine workmanship etc.
Recommend grade list of tungsten carbide shield: Product Name | Tungsten carbide shield for TBM cutter tools |
Grade | Equal to ISO Category Number | Density (G/Cm3) | Hardness (HRA) | Bend Strength (TRS/N/mm2) | Application |
YG4C | | 15.00 | 89.5 | 1800 | Maily used as small buttons for percussion bits and as the inserts of rotary prospecting bits to cut soft, medium-hard formations. |
YG6 | K20 | 15.00 | 90 | 1700 | Maily used as the buttons of small and medium-sized percussion bits and as the inserts of rotary prospecting bits to cut soft, medium-hard formations. |
YG8 | K20-K30 | 14.7 | 88.5 | 2200 | Maily used as the buttons of small and medium-sized percussion bits and as the inserts of rotary prospecting bits to cut soft, medium-hard formations. |
YG8C | K30 | 14.7 | 88.0 | 2300 | Maily used as the buttons of small and medium-sized percussion bits and as the inserts of rotary prospecting bits to cut soft, medium-hard formations. |
YG9C | YK20 | 14.50 | 87.0 | 2400 | Maily used as the inserts and buttons for rotary-percussive bits, coal-cutting bits and tricone bits to cut medium-hard and hard formations. |
YG11C | | 14.40 | 86.5 | 2450 | Chiefly for the inserts and buttons of heavy rock drill bits and rotary-percussive bits, coal-cutting bits and tricone bits to cut medium-hard and hard formations. |
YG13C | | 14.30 | 86.0 | 2500 | Mainly used as the inserts and buttons of tricone bits rotary-percussive bits and heavy rock drill bits to cut medium-hard and hard formations. |
YG15 | K40 | 14.00 | 86.5 | 2500 | It is stronger, and is mainly used as the inserts and buttons of rotary-percussive bits, heavy rock drill bits to cut hard and very hard formations. |
YG16 | | 14.10-14.30 | 87.5 | 2400 | It is mainly used for making cemented carbide substrate tips to be used in PDC cutters for excavating coal and oil field PDC bits. |
YG20 | | 13.40-13.70 | 85.0 | 2254 | Mainly for the stamping dies used in the conditions of heavy impact load and large strees. |
Carbide production
The productionprocess of powder-metallurgical products basically includes the four steps of powder preparation, forming, sintering andfinishing.
Tungsten carbide production The 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 under inert atmosphere at high temperatures. The production parameters are decisive for the WC grain size in the sintered carbide.
Powder preparation The tungsten carbide is intensely mixed with the binder metal cobalt, nickel or iron, various grain growth inhibitors and materials, which promote compaction, by wet grinding so that a homogeneous suspension is created. Afterwards, the suspension is dried in a spray tower to produce a granulate with good flow characteristics. This granulate represents the basis for all forming processes.
Metal forming The objective of the forming process is to obtain a near net shape sample. Pressing is normally carried out at room temperature with pressures reaching up to several tons per square centimetre. There are several ways of pressing blanks: During isostatic cold pressing the powder is filled into an elastic flexible hose and pressed into a compacted form through high liquid pressure. The powder blocks which are produced in this way can then be processed mechanically. All common machining methods like milling, cutting, drilling or turning may be applied. In uniaxial pressing the pressing tool consists of a die and an upper and a lower punch. The carbide powder is filled into the die 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 bar or cylindrical rod, with or without axial hole(s). A plasticiser is added to the powder. The resulting paste is pressed through an extrusion nozzle. Before sintering, the plasticiser must be evaporated in special drying furnaces. Metal Injection Moulding (MIM) is a process used to produce more complex forms which cannot be produced by direct pressing. The paste preparation is similar to the extrusion process.
Sintering process The sintering process converts the blank into a homogeneous and dense carbide with a high level of hardness. The material is 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 % during this process.
Finishing In order to achieve the final requirements of surface finish, tolerances, etc. carbide parts can be subjected to a series of finishing processes such as grinding, spark erosion and coating.
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Zhuzhou Huijin Cemented carbide Co., Ltd is located in Zhuzhou City, Hunan Province, China, where is the largest tungsten carbide producing area in China. Our main pr-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.
Address:
Guihua Group, Guihua Village, Mingzhao Township, Hetang District, Zhuzhou City, Hunan Province
Business Type:
Manufacturer/Factory, Trading Company
Business Range:
Auto, Motorcycle Parts & Accessories, Industrial Equipment & Components, Manufacturing & Processing Machinery, Metallurgy, Mineral & Energy, Tools & Hardware
Management System Certification:
ISO 9000
Company Introduction:
Zhuzhou Huijin Cemented Carbide Co. Ltd is located in the hometown of Tungsten carbide, Zhuzhou city, Hunan Province, the largest tungsten carbide producing area in China.
Our company have our own Lab for inspection, advanced production equipment, excellent technical R&D team. We have production line from mold workshop, design, production and deep processing. More than 20000 sets molds stock for production. Large stock for standard products, such like carbide rods, carbide strips, and carbide plates. In this way, our products are 100% quality guaranteed and delivery fast.
Our main products including:
Range 1, Customized products and precision processing products.
Range 2, Tungsten carbide die cores for Cold heading dies, drawing dies, nail mold.
Range 3, Tungsten Carbide cutting tools (Inserts, shims, end mill, drills, wood and stone working tools, tungsten carbide saw blade, saw tips, carbide disc cutter, percussive drill tip.
Range 4, Tungsten carbide Mineral tool (TBM cutter, button, coal drilling bits, drill bits).
Range 5, Carbide rods, carbide strips (STB blanks), carbide plates.
Range 6, Carbide nozzle, carbide mechanical seal ring, bushing, balls & seats.
Range 7, High density products
With stable products quality, professional service, competitive prices, our customers range over 50 countries and regions. You are welcome to contact us anytime for all carbide solutions.
Inquire now and receive a reply within 24 hours!
Trust us, we are your best choice!