Graphite bearing bushing

Set in 2008, with Alibaba trade assurance, specializing in bushing, bronze bushing, steel bushing, excavators and forklift parts, non-standard parts, etc.

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Graphite bearings graphite materials as the main base, graphite is acrystalline form of carbon,is a non-metallic material, color silver gray, soft, witha metallic sheen. Mohs hardness 1-2, the proportion of 2.2 to 2.3, its densityis generally 1.5 to 1.8.

 

Point high melting point ofgraphite in a vacuum to 3000 ℃ when thetrend began tosoften in a molten state, to3600 ℃ sublimation of graphitebegins to evaporate, gradually reduce the general strengthof the material at high temperatures, while the graphite heatedto 2000 ℃, its intensity onlyincreased when compared withnormal doubled, but poor resistance to oxidation of graphite oxidation rate increase as the temperature is gradually increased

 

Thermal and electrical conductivity of graphite isquite high, and its high electrical conductivity than stainless steel 4 times,2 times higher than carbon steel, 100 timeshigher than the average non-metallic.Its thermal resistance, not only over steel,iron, lead, metal materials, and thermalconductivity with increasing temperature decrease, and generalmetal material is differentat very high temperatures, graphite and even tendsto the adiabatic state. Thus, in the ultra-high temperatureconditions, thermal insulation properties of graphite is veryreliable.

 

Graphite has good lubricity and plasticity,graphite friction coefficient is less than 0.1, can develop into a breathabletranslucent graphite sheet, high-strength graphitehardness at large,as well as diamond tools are difficult to process.

 

Graphite is chemically stable to acid, alkali, corrosion resistance of the organicsolvent

 

Graphite bearings applied bearing aspects of food, beverages, textiles, chemicals and otherindustrial sectors in the transport, dryer, textile machines, submersible pumpmotor and so on, these parts as grease lubricants inevitably cause pollution,while self-lubricating graphite bearings strong, corrosion-resistant, do notuse lubricating oil for long-term operation. Wear proportional to the squareload, temperature and velocity of the graphite bearing, when the pressure is0--0.49MPa, the variety of materials can meet the needs of graphite bearings.In order to improve the mechanical strength of the product, in particular inorder to improve impact resistance and toughness, good wear resistance of somecommonly fusible metal impregnation treatment. Antimony graphite bearingpermissible operating temperature of up to 500C,antimony and copper for easy wear stained when working under heavy load andfast conditions, the wear resistance can be increased 2 - 3 times. The strengthof the graphite material increases with increasing temperature trend has beenmaintained to about 2600C,at room temperature, high temperature strength is 3 times. There are twofriction bearing forms, namely static and dynamic friction, generally carbongraphite bearing static friction than metal bearing the same in the case ofsmaller.

 

The carbon seal ring by a variety of carbonaceous materials (coke, carbon black, coal, graphite) powdermade of graphite ascompared with the excellent corrosion resistance and other non-metallic materials,which in addition to durable and strong oxidizing media (e.g. aqua regia, nitricacid, the concentration of morethan 60% of chromic acid, potassium dichromate, potassium permanganateand 10% offluorine, 100% bromine,ammonia, etc.), but also the ability of anyconcentration of acid, alkali, saltsolution and allorganic corrosion. Graphite material having particularly good self-lubricating properties,quite small frictioncoefficient. When graphite andmetal on the ground, thefriction coefficient of 0.04-0.05,showing little wear rate. Graphite has a high thermalconductivity [80-180Cal / (mh ℃)] and electrical conductivity (5 × 10-4-60 × 10-4Ω.cm), with the reduction below 3000 ℃, which in neutral medium high stability,and low coefficient of linear expansion (2-3 × 10-6 / ℃).

 

Carbon seal ring into Baptist resin immersionmetal leaching siliconcarbide and so on.

 

Graphite bearings Product advantages

1.    High-precision machining equipment and a good process, a strong guarantee of the basic dimensions of graphite products and goodappearance

2.      2. High-purity graphite materials, low impurity content. Long-term use at high temperatures without deformation and durable.

3.      3.Theanti-corrosion,not easy to burst.

4.      4.Theexcellent self-lubricatingproperties;

5.      5.Goodchemical resistance

6.       6. The highthermal conductivity and thermalstability;

7.       7. sufficient mechanicalstrength and impact resistance;

8.      8. easy machining, can be processed into a variety of geometricshapes.

 

 

Name

Graphite bearings

Fixed carbon

99.99（%）

Specification

400

Model

GB

Trademark

Moisture

0.01（%）

Degree of expansion

0.01（Time）

Sieve materialsize

0.11（%）

Ash

0.10

Volatile

0.02（%）

Under the screensize

0.13（%）

Load direction

Radialthrust

 

 

Graphite bearings Product Use

Because of the unique high performance graphite increasingly widespread use in modern industry

1, for the refractory: Graphite and its products has properties of hightemperature and high strength inthe metallurgical industry mainly usedto manufacture graphite crucible, commonly used in steel-makinggraphite ingot ofprotective agent, metallurgical furnacelining.

2, as the conductive material: the electrode, the positive brushes, carbon rod, carbontubes, mercury positive converter, graphite gaskets,phone parts, television picture tubecoatings in the electrical industry for manufacturing.

3, as a wear-resistant lubricatingmaterials: graphite as alubricant in the machinery industryoften. Lubricants are often not in thehigh-speed, high-temperature, high-pressure conditions of use, and graphitewear-resistant material can be (a) 200 ~ 2000 ℃ temperature at high sliding speeds, without lubricants work.Many transport corrosivemedia equipment, widely usedgraphite material piston cup seal and bearing, do not need adding oil when theyare running. Graphite milkalso many goodlubricants metal processing (Roberts, trombone) is used.

4, graphite has good chemical stability. After special processing of graphite, resistantto corrosion, good thermal conductivity, low permeability, it is used extensively for the production of heat exchangers, reaction tank, condenser, burning towers,absorption, coolers, heaters, filterspump equipment. Widelyused in petrochemical, hydrometallurgy, acid production,synthetic fibers, paper and other industrialsectors, can save a lot ofmetal materials.

5, for casting, foundry,die and high-temperature metallurgical materials: graphite due to thermal expansion coefficient, and thermal shock resistantto change, as the glass molds,graphite black metalobtained after castingprecise size, smooth surface yieldhigh, not processedor minor processingcan be used, thus saving a lot of metal.Productionof carbide and other powdermetallurgy process, usually graphite material die andsintering boat. Monocrystallinesilicon crystal growth crucible,regional refining vessel, the stentfixture, induction heaters, etc. are processedwith high-purity graphite.Also graphite canbe made of graphite vacuum insulation panels and smelting base,high-temperature resistance furnacetubes, rods, plates, sheds and other cell components.

6 for the nuclear industry and the defense industry: Graphite has good neutron moderator foratomic reactors, uranium-graphitereactors is currently the more of a nuclear reactor. As used in nuclear reactor power reductionmaterial should have a high meltingpoint, stability, corrosion-resistant properties, graphite fullymeet the above requirements. As anuclear reactor with high purity graphite,impurity content should not exceed dozens PPM.In particular the boron content should be less than 0.5PPM. In the defense industry, but also with graphite partsmanufacturing solid fuel rocket nozzle, missilenose cones, Astronautical equipment, insulation materials and anti-radiation material.

7, graphite can prevent boilerscale, the unit testsshowed the water by adding acertain amount of graphite powder (per ton of water about 4 ~ 5 grams) to preventfouling of the boiler surfaces. Also graphitecoated on metal chimneys,roofs, bridges, pipelines cancorrosion and rust.

8, graphite pencil can beused raw, polish. Graphite specially processed later, you can create a variety of specialmaterials for the relevant industrial sectors.

關於

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About Us

Organizers is ZhiJia bearing factory, committed to design, manufacture the sliding bearing, wear-resistant bushing, bearing bushes and parts; Involved in all kinds of materials such as copper, steel, aluminum, resin and graphite; Mature manufacturing process and complete production line, such as roll round, stamping, precision machining technology, heat treatment and surface treatment; Set in 2008, with Alibaba trade assurance,to provide you with the latest quotation, authoritative technical consulting, more products and services. Please contact us early and win benefit!

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