Tungsten Carbide Grit

Introduction of Tungsten Carbide Grit

Tungsten carbide grit (WC), also directed to as cemented carbide, is a combined media simulated by a process reached powder metallurgy. Tungsten carbide powder, commonly varying in consonance in the middle of 70%-97% of the entire weight, is combined accompanied by a binder metal, usually cobalt & nickel, compressed in a die & then sintered in a furnace. Duration “cemented” directs to tungsten carbide grit being charged in metallic binder material &“ cemented” jointly, constructing a metallurgical adhesive in middle of tungsten carbide grit & binder (WC - Co), in sintering process. Tungsten carbide grit industry generally directs to this media as thoroughly “carbide”, even though phrases tungsten carbide & cemented carbide are utilized interchangeably.

If the permanent distortion of media at defeat is quite small, the material is labeled brittle; if the plastic distortion is very large, material is called ductile. Carbide is managed technically as a “brittle” material since it exhibits little or no plastic distortion foregoing the beginning of a crack & total failure. Without existence of the metallic binder phase, tungsten carbide is conceivable & supposed a ceramic material similar identical to silicon carbide grit or aluminum oxide. Description of a ceramic material is the marriage of a metal to a nonmetal, for example, silicon (metal) carbide (carbon, nonmetal), aluminum (metal) oxide (oxygen, non-metal), & silicon nitride. A cermet is a crossbred material comprised of ceramic (cer) & metallic (met) materials. It is the addition of the metallic binder, i.e. cobalt & nickel certain causes cemented carbide (WC- Co) to a cermet & differentiates it from truly brittle materials, certain is, the ceramic family of materials. We are the best tungsten carbide grit manufacturer in India. Tungsten carbide grit price depends on the size and grade of tungsten grit in India. Our tungsten carbide grit price is low compared to others.

Tungsten grit is the selected material for components certain must resist all formations of wear (inclusive of sliding abrasion, erosion, corrosion/wear & metal-to-metal galling) & exhibit a heightened capacity of toughness. It demonstrates elevated compressive strength, resists deflection, & encloses its hardness values at elevated temperatures, a physical property specifically helpful in metal-cutting applications. It delivers a long life in applications where different materials would not last & would fall prematurely.

Tungsten Carbide Grit Uses

In order to increase the wear resistance properties of hard surfacing materials, tungsten carbide grit is utilized extensively in metal-bonded products for the abrasion of tough materials like composites, fiberglass, reinforced plastics, rubber, and other specialized parts through the use of thermal spray gun procedure, wear-resistance electrodes and mace electrodes, saw blades, rock and stone polishing and granite engraving machine operation, ceramic and metal lapping and polishing applications, glass etching, and glass carving industries. 

As mentioned previously, tungsten grit is delivered by a powder metallurgy process. Compression process is accomplished beneath significantly increased pressure in an automated press & in an isostatic enclosure to form a component accompanied by the character of blackboard chalk. A small portion of wax (paraffin) is counted to improve green strength & usefulness in managing compressed shape. In this “green” condition, it can be constructed & shaped by traditional procedures like turning, milling, grinding, & drilling. Constructed & shaped carbide is then sintered. throughout the sintering procedure, tungsten grit is authorized to shrink approximately.  20% linearly, & almost 48% by volume. For an “as-sintered” element, it is regarded as an industry ideal to enclose a tolerance of ± 0.8% of proportions & ± 0.005”, anything is more eminent. More knowledgeable tolerations can be kept on trimmer pressed parts. Behind sintering, cemented tungsten carbide grit has accomplished its whole density & hardness. It can then be manufactured by diamond wheel grinding & electrical combustion machining (EDM) techniques.

Properties of Tungsten Carbide Grit 

Hardness

This is one of numerous essential properties of tungsten carbide grit. It is one physical property certain is thought to be numerous influential when it arrives to scrape resistance, although this property unattended does not dictate conquest of a tungsten grit quality in a wear application. Hardness is decided by indenting a representative accompanied by a diamond penetrator per ASTM traditional B-294. Hardness values for cemented tungsten carbide grit are usually articulated in duration of Rockwell “A” or Vickers values. Steels are evaluated similarly & are communicated in periods of Rockwell ”C”. Figure II-1 depicts the approximate conversion of Rockwell “A” to “C”. It can be seen certain a D2 tool steel heat treated and hardened to a Rockwell C value of 62 is still quite soft when corresponding to a 6% cobalt binder quality of carbide accompanied by a value of 92 Rockwell ”A”. Due to tungsten carbide grit hardness used for remove rust, old paint and improve metal surface in sand blasting machine operation. 

Density

Density is evaluated utilizing ASTM traditional B311. Density of tungsten carbide equals turning on its composition by reason of it is a hybrid material accompanied by dissimilar individual densities for each of its constituent ingredients. Density of tungsten carbides is interpreted under their composition when these materials are incorporated in additional proportions. Usual density of a 10% cobalt binder material is 14.5 g/cc. Given that this number is twice as dense as 1040 carbon steel shot, it is important to take consequences into account when designing.

Transverse Rupture Strength

This approach typically specifies mechanical stability of cemented carbide more so than a tensile test, which is examination employed for steel. This is for the reason that some fragile materials are extremely exposed to surface imperfections or notch misalignment of the tensile test device, which could cause a pressure engagement & produce approximate test outcomes. Transverse rupture stability(TRS) is defined by loading a common sample (as per ASTM B-406, ISO 3327) in middle of two supports & observing when a rupture occurs. Outcome acquired is referred to as bending & crossways rupture stability & is computed as load at which the representative must snap. This is conveyed in psi & N/mm2, limitation per division area. Because micro-voids, which are present in all breakable materials, cause a spectrum of rupture values in cemented carbide, multiple tests are maintained out, & the outcome is treated as measurement of all questioning. Tungsten carbide grit can use in all types abrasive blasting machine operation for improve metal surface, remove rust, before the thermal spray coating.

Transversal rupture stability values of certain cemented carbide grades certain are displayed in the property graphs of distant suppliers established on the aforesaid traditional test &, like, exclusively characterize mechanical stability for this selection size. Actually, in carbide sector, many designers frequently consider TRS values to be innovation stability value for a characteristic & utilize them to anticipate whichever value will remain true when determining which quality should function in a separate application. In certitude, these values drop as portion size grows, & size outcome necessitates computation of design stability value for longer pieces.

Compressive Strength

Considerably elemental aspects of cemented tungsten carbide grit is also this one. While frangible materials will break predominantly from a shear breakage instead of natural compression, flexible materials beneath compaction pressure will merely bulge & swell unaccompanied by rupture. When corresponded to almost any other abrasive media, cemented carbide demonstrates an identically elevated compressive strength, & its value grows accompanied by reducing the amount of binder & dropping the grain size. Cemented carbide naturally includes values in the middle of 400K-900K psi (7 kN/mm2), hanging on the particle size & binder concentration.

Modulus of Elasticity of Cemented Carbide

The modulus of elasticity or Young’s Modulus (E) is a prototype of “stiffness” of a material & is measured as the rate of change of tensile or compressive stress ““concerning unit strain “є ” & is described as: E = /є

Impact Strength

It might be rather challenging to pinpoint precise remedies for influence issues. Consequence stress formulas indicate certain some pressures are strongly correlated accompanied by the modulus of stretchiness; hence, tungsten grit, which has a more increased modulus of stretchiness, is not suitable for all influence applications. A significantly more increased binder grade including 25% cobalt binder accompanied by a more insensitive grit construction & an unexpectedly heightened degree of consequence strength is required, though, because of hardness of cemented tungsten carbide grit. It is common to engage transverse crack as a measurement of outcome resistance when, actually, rupture toughness is a more appropriate mensuration of the capability of tungsten carbide grit to resist mechanical shock & impact. Grain size & binder range have an impact on fracture toughness.

Fatigue Strength

In pressure blasting cabinet When a tungsten carbide grit media is dominated by replicated cycles of pressure deterioration & instability, neglect may occur consistently exact if the greatest pressure is less than what would have generated a decline if maintained loading existed been stable. Exhaustion possessions are differentiated by subjecting test specimens to highlight cycles & counting numeral of cycles to failure. This usually outcomes in a plot of values shown on an S-N diagram where failure stress is on Y axis & numeral of cycles at which failure occurred is shown on the X axis. Several extensive companies in carbide industry have conducted such tests & have documented their findings. according to reports confident the exhaustion stability of cemented tungsten carbide grit underneath pulsating condensation loading can be assumed to be 65–85% of the stationary compressive resilience at 2 x 106 cycles. No substantial fatigue stability limit, which approximates an unlimited life, has been discovered as in the matter of steel & other metals. The exhaustion strength improves accompanied by dropping tungsten carbide grain size & dropping binder content.

Tungsten Carbide Grit Supplier in India

Airo Shot Blast is the leading tungsten carbide grit manufacturer and also tungsten carbide grit supplier in India at a low price. We also offer automatic sand blasting machine, abrasive shot blasting machine, stone shot blasting machine, airless blasting machine, air-operated blasting machine, grit blasting machine, sand blasting spare part, remote control valve, thermal spray gun, tungsten carbide coating, metallizing gun, hvof gun, abrasive media, tungsten grit, high carbon steel shot, steel grit, cast steel grit, chilled iron grit, aluminum oxide, thermal spray powder, silicon carbide powder, thermal spray wire, zinc wire, babbit wire, mineral powder, gypsum powder, dolomite powder, fly ash powder etc.