high purity AL2O3 95%

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Brown Fused Aluminum Oxide BFA
Rust removal+Reusable abrasive
Paint-stripping+Roughening
blast-cleaning

Brown Fused Aluminum Oxide BFA

Brown fused alumina is made from high quality bauxite by fusing in an electric arc furnace at high temperature. It has good toughness and high hardness. It is suitable for manufacturing of vitrified and resin bonded tools, and for lapping , polishing , and sand blasting and sand cleaning.
It can be also used to make superior refractory products.

Application Industry : A brasives industry, refractory materials
Abrasive cutting tools, moulds, bulletproof material
To make mechanical parts, all kinds of mold
To do mechanical parts, all kinds of mold
Ceramic grinding tool, high-grade abrasive, abrasive, abrasive belt, organic coated abrasive tool


Brown Fused Alumina SPEC:

ItemsUnitIndexTypical
Al2O3%95%min95.6
ChemicalSiO2%1.50max1.36
CompositionFe2O3%0.30max0.07
TiO2%3.00max2.05
CaO+MgO%1.0max0.7
Melting point°C2050
Refractoriness°C1980
True density g/cm33.90min
Mohs hardness---9.00min
Grain sizemm0-50,0-1, 1-3, 3-5,5-8
Fine powdermesh-80, 100, 150, 200, 325F
Abrasive gradeFEPAF14---F30—F150-F220


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Q:Carbide drills and cobalt high speed steel bit, which is good? What's the difference between these two materials?
The two materials are not good or bad, the key is to look at the application!!Carbide drill, high hardness, wear resistance, high efficiency, toughness slightly worse, therefore, the rigidity of the machine tool and spindle runout and speed are required!Cobalt high speed steel including ordinary high-speed steel, good toughness, edge processing can be very sharp, more suitable for processing some sticky materials, of course, low strength materials will be nothing difficult, but its high temperature resistance, wear resistance is relatively poor, the drilling speed is not high!!Therefore, the choice of drill or according to your working conditions to choose,
Q:What is steel bonded carbide? What are its characteristics?
Good physical and mechanical properties of steel bonded carbide in a hardened state has very high Hardness. Because it contains a lot of dispersed high hardness of hard phase, the wear resistance can be close to the high cobalt hard alloy. Compared with high alloy die steel, has high elastic modulus, wear resistance, compressive strength and flexural strength. Compared with the hard alloy, with good toughness. It has good chemical stability and self lubrication resistance, low friction coefficient and excellent.
Q:How to tell what is hard alloy and what is high speed steel?
Carbide and high-speed steel, grinding wheel spark identification, red spark is high-speed steel, no grinding wheel with hammer hammer, easily crisp alloy, also can use magnet experiment, carbide is not sucked, high-speed steel can suck.Cemented carbide is a kind of alloy material made by powder metallurgy process of hard metal and bonding metal of refractory metal. Hard alloy with high hardness, strength and toughness, good wear resistance, heat resistance, corrosion resistance and a series of excellent performance, especially high hardness and wear resistance of it, even at a temperature of 500 DEG C also remained unchanged, at 1000 degrees C still have high hardness. Hard alloy is widely used as a tool material, such as turning, milling, planing, drilling, boring, used for cutting cast iron, non-ferrous metals, plastics, chemical fiber, graphite, glass, stone and steel, can also be used for cutting steel, stainless steel, high manganese steel, tool steel and other hard processing materials.Is a kind of high speed steel tool steel with high hardness and high wear resistance and high heat resistance, and high speed tool steel or steel, white steel. High speed steel was developed by American F.W. Taylor and M. White in 1898. High speed steel has good technical performance, good strength and toughness, so it is mainly used to make complex cutting edge and impact resistant metal cutting tools. It can also manufacture high temperature bearings and cold extrusion dies. In the production of high-speed steel by melting method, after 1960s and the emergence of powder metallurgy high speed steel, its advantage is to avoid melting methodproduction caused by carbide segregation caused by mechanical performance and reduce the deformation of heat treatment.
Q:K carbide carbide cutting tools, mainly used for turning what materials?
K class brand is the international standard ISO code, equivalent to China's class YG carbide brand, suitable for processing stainless steel, non-ferrous metals and alloys, as well as non-metallic materials, cast iron and other materials.
Q:5 meters long hard alloy bars, where are they sold?
Because of being restricted by the conditions of equipment for the production of hard alloy long alloy strip production generally more difficult, even if the production price is not expensive, you can consider the method of sectional concrete can look at Zhuzhou with a hard alloy.
Q:What is the coefficient of thermal expansion of cemented carbides?
The thermal expansion coefficient of cemented carbide is about 6*10^ (-6) / C, and there is a slight difference according to the type of cemented carbide
Q:Printing requirements for cemented carbide
Since 80s the advent of nano cemented carbide, and gradually formed a new sintering method, such as microwave sintering, field assisted sintering (such as spark plasma sintering and plasma activated sintering), two stage sintering, selective laser sintering etc..Vacuum sintering (Vacuum Sintering) is one of the more widely used methods for cemented carbide sintering, which began in the 30s of last century,Great progress has been made in the past thirty years. Vacuum sintering is the process of sintering and pressing in a negative pressure gas medium. Vacuum sintering can improve the purity of furnace gas and the negative pressure can improve wettability of bonded hard phase. Vacuum sintering has the following advantages: sintering in vacuum condition, hinder greatly reduces the adsorption of gas on the surface of powder and closed pore gas on the densification of the powder, is favorable to the diffusion process, which is conducive to the densification; better able to exclude Si, Mg and Ca in the sintered body trace of oxide impurities thus, to improve the purity of hard alloy; improve the wettability of liquid phase sintering, is conducive to tissue shrinkage and improve the alloy.
Q:The difference between carbide knife and white steel knife
3, hardness is not the same: cemented carbide hardness, especially at high temperature hardness, but high-speed steel toughness better4, can withstand the cutting speed is not the same: due to the red hard high, can withstand higher cutting speed, and high-speed steel is now not high speed
Q:How to polish and polish cemented carbide? Five
Another case is that the chemicals in the polishing fluid react with the Co phase in the alloy, causing the Co to overflow or Co to deposit again, so that you need to consider whether you need to replace the polishing fluid.
Q:Material properties of Cemented Carbides
Hard alloy with high hardness of refractory metal carbides (WC, TiC) micron powder as the main ingredient, with cobalt or nickel (Co) (Ni), molybdenum (Mo) as the binder, powder metallurgy products in vacuum furnace or hydrogen reduction sintering furnace. IV, B, V, B, VI, B group of metal carbides, nitrides, boride, etc., because of hardness and melting point is particularly high, collectively referred to as cemented carbide. The structure, characteristics and application of hard gold content are described with carbide as the key point. IV, B, V, B, VI, B group metals and carbon formed in the metal type carbide, because the carbon atom radius is small, can be filled in the gaps of the metal lattice, and retain the original lattice form of metal, forming interstitial solid solution. Under appropriate conditions, such solid solution can continue to dissolve its constituent elements until it reaches saturation. Therefore, their composition can change in a certain range (such as the composition of titanium carbide in TiC0.5 ~ TiC changes), chemical formula does not conform to the rules of valence. When the dissolved carbon content exceeds a certain limit (such as titanium carbide in Ti: C=1: 1), the lattice type will be changed, the original metal lattice metal lattice into another form, then the interstitial solid solution called interstitial compounds.

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