Electroplated Diamond Products Superabrasives are tools used in precision grinding,precision cutting,precision polishing and precision drilling,like flexible diamond abrasive.Superabrasive materials attach to a wheel,blade and drill to make Superabrasive grinding wheels,cutting balde and drilling bit.The reason some abrasives are Superabrasives is due to their extraordinary hardness,unparalleled performance,and longevity. diamond abrasive products,continental abrasives,Superabrasives Precsion Polishing,Superabrasive Grinding Wheels,Profiled Superabrasive Grinding Wheels,Flexible Diamond Abrasive Hans Super Abrasive Diamond Tool Co.,Ltd , https://www.hansuperabrasive.com
What are Superabrasives?
Abrasives that belong to the Superabrasive family includes,Industrial diamonds: an industrial diamond is a non-gem quality small diamond that is for abrasives,cutting,and drilling tools.
Cubic boron nitride (CBN): Usually called CBN it is the second hardest cutting tool material after a diamond.
Polycrystalline: Is an abrasive material that has a multiple collection of crystal grain structures with individual orientations
CVD Diamond: These are synthetic diamonds made by a process known as chemical vapor deposition.CVD diamonds grow from a hydrocarbon gas mixture. They are extremely hard,have a high thermal conductivity that is five times that of copper. They also have broadband optical transparency,are chemically inert,and only reach graphitization at very high temperatures.
Nanodiamonds: These tiny diamonds are the product of a controlled explosion. Sometimes called a detonation nanodiamond (DND) or an ultradispersed diamond,as this is how they form.
Industries That Use Superabrasives
A great number of industries use Superabrasive grinding wheels and the coated abrasives subsection of the abrasives industry continues to grow. Industries that are prime buyers of Superabrasive grinding wheels are,
Aerospace
Aluminum Mills
Leather Tanneries
Automotive
Machinery
Bearings
Marble
Boat Building
Medical Instruments
Brick & Tile
Metal Fabrication
Broaches
Metallurgical Labs
Ceramic Products
Motor Vehicle Parts
Construction
Oil Field Equipment
Contract Machining
Paper Mills
Copper Mills
Plastics
Cutlery
Precision Gages
Cutting Tools
Railroad Equipment
Dental Equipment
Rubber
Forest Products
Saw Blades
Foundries
Ship Building
Gears
Springs
Glass Products
Steel Mills
Golf Clubs
Valves
Granite
Welding
Advantages of Superabrasives
The advantages of Superabrasive grinding wheels are more than extraordinary hardness,unparalleled performance,and longevity. These three features of Superabrasives are the core of many advantages manufacturers gain by an aggregation of services that normal abrasives simply cannot deliver.
These include:
Less expensive tooling and fixturing costs
More wheels on the spindle,smaller wheels,multiple operations
Less floor space needed for manufacturing
Virtual elimination of wheel wear
Automated CNC machines,less labor intensive operations requiring less training
Consistent surface speed from part to part
Better overall throughput with fewer machines needed
Improved Material Removal Rates,Lower Per Part Abrasive Costs and higher speeds
With Superabrasives,production increased by automated CNC equipment,industries have found one way to compensate for the lack of availability of skilled labor. With fewer machines needed,so is fewer workers. With Superabrasives CNC,automation is more concerned with defining a manufacturing process using machine capabilities and mechanization. There is less concern on operator technique. A properly defined process,combined with automatic loaders make for equipment that is almost running itself.
Industry Outlook
Future growth of the abrasives industries will primarily be in Superabrasives. Currently,research and development of Superabrasives are taking place in the following areas.
Custom designed [hard to grind" materials in an increasing number of industries
Creep or deep feed grinding
High-speed,high-performance grinding of hardened steel
Form grinding,sometimes with electroplating,in high precision,high-removal,and high-surface quality applications
CNC-control of line grinding machines
Other abrasive technology developments with Superabrasives are likely to occur in using CVD for the best bonding of coatings to diamond wheels
Emergency shut-off valve material selection
The valve body and valve cover are in direct contact with the medium and withstand the pressure and corrosion of the medium. The materials used must meet mechanical properties as well as good cold and hot working process under the specified medium temperature and pressure. Due to the complex shape of the valve body and bonnet, so the casting molding method. In view of the emergency shut-off valve is installed on three types of pressure vessels, and the media is highly toxic and corrosive, valve casting quality is particularly important. In recent years, a large number of precision casting process applications, so the nominal size DN ≤ 50mm, the valve body and bonnet with precision cast LCB steel castings or 25,35 steel. Due to the emergency shut-off valve for storage of liquid chlorine medium device, the sealing surface material must be resistant to liquid chlorine corrosion and erosion. In addition, due to the sealing force of this type of valve is mainly medium pressure and spring force, can not add a great sealing force, so the choice of sealing PTFE and chrome-nickel stainless steel composite structure. PTFE corrosion resistance, low friction coefficient, chemical stability, suitable for use in liquid chlorine medium. Chromium-nickel stainless steel (commonly used grades 0Cr18Ni9, 0Cr18Ni9Ti, 1Cr18Ni9 and 1Cr18Ni9Ti) have good corrosion resistance, low temperature resistance and erosion resistance, relatively suitable for liquid chlorine medium, the temperature range can be within the - 196 ~ 600 ℃ . The linear expansion coefficient of the sealing surface and the body material should be close, and the structure of the sealing ring is also important to avoid loosening under the additional stress. The spring is the key part of the emergency shut-off valve, the quality of the large spring affects the sealing performance and service life of the valve, the quality of the small spring affects the over-current shut-off performance, and the spring quality largely depends on the spring material. Relatively adapted emergency cut-off valve spring material for 1Cr18Ni9 austenitic stainless steel, as long as properly handled, both corrosion of liquid chlorine, but also to ensure the quality of the spring. Pivot valves and over-flow valve and other internal parts of the valve body is directly in contact with the media parts, if these parts are subject to corrosion of the media, it will directly affect the life of the emergency shut-off valve, serious safety accidents will occur. Therefore, the parts in direct contact with the medium selected austenitic stainless steel, then according to different requirements, determine the different heat treatment methods. The O-ring used on the emergency shut-off valve can prevent leakage of the medium and resist the corrosion of liquid chlorine. The outer layer is polytetrafluoroethylene ring and the inner layer is silicone rubber ring. The adhesive layer is suitable for working temperature and resistance Ageing. O-ring coated with anti-oxidizing medium corrosion is an excellent seal components.
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