Tuesday, 20 August 2013
Tool Steel (51-100) in a carbon tool steel
Tool Steel (Tool Steel (51-100)), is used to manufacture cutting tools, measuring tools, dies and wear-resistant tool steel. Tool steel with high hardness and high temperature can maintain high hardness and red hardness, and high wear resistance and appropriate toughness. Tool steel is generally divided into carbon tool steel, alloy tool steel and high speed tool steel.
Carbon tool steel carbon mass fraction is higher, at 0.65-1.35%, and their organizations are hypoeutectoid, or eutectoid eutectoid steel. Carbon tool steel heat treated to receive a higher surface hardness and wear resistance, the center has good toughness; annealed low hardness (less than HB207), good processing properties. But its red hardness difference, when the working temperature up to 250 ℃, the hardness and wear resistance of a sharp decline, down to HRC60 hardness below the hardenability of these steels is low. Larger tools can not hardenability (water quenching diameter of 15mm), water quenched when the center of the surface hardened layer with hardness vary greatly. Makes the tool easy to produce deformation during quenching. Or the formation of cracks addition, the quenching temperature range is narrow, the quenching temperature should be strictly controlled. Prevent overheating, decarburization and deformation.
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From:Metal materials
Tuesday, 13 August 2013
What is Flourspar Powder?
Flourspar Powder halide minerals. The main components of calcium fluoride of the formula CaF2. In the ultraviolet ray irradiation or a cathode, blue green fluorescence. Sometimes yttrium and cerium rare earth elements. Equiaxed crystal, crystal often cube, octahedron, rhombic dodecahedron and so on. Collection of dense granular or lumpy. Often has green, blue or purple, or colorless and transparent. Vitreous luster, Mohs hardness 4, a completely octahedral cleavage. Specific gravity 3.18. Mainly in hydrothermal veins. Often associated with sphalerite, galena symbiosis. Colorless fluorite in granitic pegmatite veins or fluorite crystal cave. Preparation of hydrofluoric acid is the main raw material, also used as enamel, glass, cement manufacturing ingredients and metallurgical industry flux, and as a rocket fuel catalyst. Colorless, transparent optical lens can be made by. China is the largest country in the world fluorspar production, the main origin of Zhejiang, Hunan and Fujian. The world's major origin of South Africa, Mongolia, the United States, Russia, Thailand and Spain.
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From:Metal materials
Monday, 12 August 2013
What is Fluorspar Lumps?
Fluorite is the industry's main source of fluorine, which is widely used in aerospace, refrigeration, pharmaceuticals, corrosion, fire, electrical, mechanical, and nuclear and other fields. Fluorite resource-rich country, many deposits, reserves, production and export volume ranking first in the world.
Fluorite, also known as fluorspar(Fluorspar Lumps), is the industry's main source of fluorine, the world's 20 several important non-metallic mineral raw materials. Pure colorless fluorite can be used as an optical material, beautiful color fluorite gem stone and also as arts and crafts carving raw materials. Fluorite is fluorine chemical industry's basic raw materials, its products are widely used in aerospace, aviation, refrigeration, pharmaceuticals, pesticides, anti-corrosion, fire, electronics, electrical, mechanical and nuclear and other fields. With the continuous development of technology and the economy, fluorite has become an important modern industrial mineral raw materials, many developed countries regard it as an important strategic material for reserves. Chinese fluorite resource-rich, widely distributed, many deposit types, resources, reserves, production and export volume ranking first in the world. Ancient Indians found that there is a small hill on the Cobra particularly large, they are always wandering around in a big rock. One of the natural phenomena cause people to explore the mysteries of interest. Originally, when night fell, where the big stone slightly blue light flashes, and many insects have phototaxis stone would have come to light over the flying frog jumped out to competing predator insects, hiding not far from the Cobra have also come predation frog. Thus, the people of this stone is called "Snake Eyes Stone." Later learned that Snake Eyes is fluorite stone.
The ingredient is calcium fluoride fluorite, also known as fluorspar, Fei stone, because it contains a variety of rare elements and often has purple, green, light blue, colorless and transparent fluorite rare and precious. There are crystal cube, octahedron or rhombic dodecahedron. If put into the ultraviolet fluorescent fluorite according to a photo, it will issue a beautiful fluorescence.
The use of fluorite and its processed products have been involved in more than 30 industrial sectors. Fluorite added steel refining, can improve the melt fluidity of sulfur and phosphorus to remove harmful impurities.
Half of the world for the manufacture of fluorite production of hydrofluoric acid, the development of manufacturing Cryolite for aluminum smelting industry. The fridge coolant (Freon) to use fluorite; 1986, China's first generation of artificial blood should be used fluorite. Scientists are developing fluoride glass optical fiber communication may produce a new material that can pass through 20,000 kilometers wide in the Pacific instead of being re-issued station.
Production throughout the world. Fluorite Fluorite, also known as fluorspar, chemical composition of CaF2, crystals are equiaxed halide minerals. In the ultraviolet ray irradiation or heating the cathode when the blue or violet fluorescence, and hence the name. Crystal appearing cube, octahedron, or cube interspersed twins, collection of granular or lumpy. Light green, purple or colorless, transparent, sometimes red roses, white streak, vitreous luster, transparent to opaque. Octahedral cleavage completely. Mohs hardness is 4, the proportion of 3.18. Fluorite is mainly produced in hydrothermal veins. Colorless fluorite crystals in granitic pegmatite veins or fluorite crystal cave. World's total reserves of about 1 billion tons of fluorite, China is the world's one of the largest mineral fluorite, and accounted for 35% of world reserves, according to archaeological excavations that, seven thousand years ago, Zhejiang Yuyao Hemudu people, has selected the firefly stone as decorations. Hemudu fluorite mine south indeed exist. Mainly in Zhejiang, Hunan, Fujian and other places. World's other major origin of South Africa, Mexico, Mongolia, Russia, the USA, Thailand, Spain and other places. Fluorite flux used in the metallurgical industry, in the chemical industry raw material for the manufacture of hydrofluoric acid.
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From:Metal materials
Tuesday, 6 August 2013
Lead Ore is an important ore minerals refined lead
Lead Ore is an important ore minerals refined lead, lead is blue-gray metal, the new fracture with brilliant metallic luster. The solid state density is 11.35 g / cm 3, a melting point of 327.4 ℃, boiling point of 1525 ℃, pure lead metal is the most flexible, Mohs hardness of 1.5. Lead has good malleability, ductility but very small, intolerant tension. Very low thermal conductivity of lead, equivalent to 7.5% of silver, conductivity is very poor, and only 7.77% of silver.
Lead with high chemical stability, in dry air at room temperature when no chemical changes. Lead soluble in dilute nitric acid, sulfuric acid at room temperature and hydrochloric acid insoluble lead. Hydrochloric acid and sulfuric acid at room temperature only role and lead surfaces, as PbCl2 and PbS04 generated virtually insoluble, attached to the lead on the surface of the internal metal from corrosion. Lead and alkali, ammonia, chlorine solution and organic acids, esters are not react.
Because lead is acid and alkali corrosive nature, wider use, if we can use him to manufacture various components of chemical equipment, metallurgical plant cell, communication cable sheathing materials, as well as doing batteries, etc.; also be made Babbitt alloy I-lead bearing alloy of lead can absorb radioactive rays, it is used X-ray industrial and nuclear industry, lead compounds used in paints, ceramics, glass, rubber, petroleum refining and other industries can be used for solder, printed alloy.
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From:Metal materials
Monday, 5 August 2013
Nickel Ore related presentations
Known Nickel Ore about 50 species. Where sulfides such as pentlandite, nickel-iron and other purple sulfur exists in the form of free nickel sulfide, a considerable part of nickel isomorphism occurs in pyrrhotite.
Nickel is a silvery-white metal, first in 1751 by the Swedish mineralogist Cronstadt (AFCronstedt) isolated. Because of its good mechanical strength and ductility, high temperature refractory, and has a high chemical stability, in the air oxidation and other features, it is a very important non-ferrous material, is used to make stainless steel, high nickel alloy and alloy steel, widely used in aircraft, radar, missiles, tanks, ships, spacecraft, nuclear reactors and other military manufacturing. In civilian industry, often made of nickel steel, acid-resistant steel, heat-resistant steel is used extensively for a variety of mechanical manufacturing. Nickel also for ceramic pigment and corrosion coating, nickel-cobalt alloy is a permanent magnet material, widely used in electronic remote control, nuclear industry and ultrasound technology and other fields, in the chemical industry, nickel is often used as a hydrogenation catalyst. In recent years, color television sets, tape recorders and other communications equipment and other aspects of nickel consumption is also increasing rapidly. In short, the Nickel has excellent performance, has become the development of modern aviation industry, defense industry and the establishment of a high level of human material and cultural life of the modern system of essential metals.
In the southeastern province of Ontario, Canada, Huron Hubei side, there is a mining city Sudbury. It is currently the world's largest nickel mine, with its output accounting for 80% of world production of nickel or so. In recent years, people around the Sudbury Nickel ore found here are unique to the impact crater structure, shock metamorphism of minerals and rocks scattered around the large rock in the impact angle. This makes people believe: Sudbury ore body may be a crater, there was now a huge rich in iron, nickel meteorite, the breakdown of Sudbury's crust, crustal mafic magma rose in open the channel, while rich in iron, nickel hot mafic magma during ascent fusion meteorite itself rich iron-nickel metal, after transformation, condensation, forming a huge nickel mine today.
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From:Metal materials
Friday, 2 August 2013
Nandrolone Decanoate Description of drugs
[Drug Name] nandrolone decanoate
[English name] Nandrolone Decanoate
[Alias] Long Dole Bao Ling, Decadurabolin, DUrabol
Drug name] nandrolone decanoate
[English name] Nandrolone Decanoate
[Alias] Long Dole Bao Ling, Decadurabolin, DUrabol
CAS Number: 360-70-3
MF: C28H44O3
Molecular Weight: 428.65
EINECS Number: 206-639-3
Melting point :33-37 ° C
Specific rotation: 32 o
Storage conditions :2-8 ° C
[Properties] white or milky white or light yellow crystal at the end, no foul.
[Function and use] This product is mainly used for protein deficiency, such as chronic wasting disease, premature children, malnutrition, frail after surgery weight loss, loss of appetite, chronic diarrhea, but also for difficult to heal fractures, osteoporosis and so on.
[Usage and dosage]
1. Adult Dosage: Intramuscular: Each 25-50mg, once every three weeks.
2. The amount of children Intramuscular: Each 10-25mg, once every three weeks. Baby every 5-10mg, once every three weeks.
[Note]
1, liver, kidney, heart dysfunction careful.
2. Prostatic hyperplasia, prostate cancer, high cholesterol, hypertension patients and pregnant women, disabled.
3. At below 10 ℃ shading confined preservation.
Other Considerations with Nandrolone.
4. Long-term heavy use of the product can cause sodium retention, liver damage, slightly masculine women and so on.
[Formulation] injection (oil solution): 10mg (1ml) / branch, 25mg (1ml) / branch, 50mg (1ml) / expenses.
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From:Chem pharma
Thursday, 1 August 2013
calcium aluminium purposes and classification
Purpose:
Fused calcium aluminate (pre-melting aluminum calcium slag) is mainly used for LF furnace, open hearth furnace, converter ladle, the molten steel stripped of sulfur, oxygen and other impurities, reduce harmful elements in steel and impurity content, For carbon steel, high carbon steel, high and low alloy steels. Already mature applications in foreign countries, such as Korea, Japan, Europe and other developed countries.
Rui Shi produced fused calcium aluminate uniform chemical composition, low melting point, melting fast, can shorten the duration of heat; no fluorine, not erode the lining and ladle; structure is dense, non-absorbent, easy storage and transportation warehousing; Since the phase stability , into slag fast, can reduce the steel plant dust pollution, comprehensive and stable refining process; does not contain hydrogen, nitrogen, carbon and other impurities, helping improve the quality of steel. The user confirms that the factory fused calcium aluminate product stability over time curve function almost as a straight line. Avoid the cheap product (sintered products, health products cupola) wavy, zigzag curve function to bring many metallurgical production suited to the phenomenon.
Product Category:
Calcium aluminate products into water treatment, steel slag agent, high alumina cement three categories: ⑴ Calcium Aluminate implementation of standards for water treatment: "People's Republic of Chemical Industry Standard (HG3746-2004)";
⑵ steelmaking slag agent calcium aluminum enforce corporate standards: Q/7436-2047-0? 001-2008;
⑶ aluminum calcium alumina cement Executive Standard: "The People's Republic of standards (GB201-2000)".
Calcium aluminate main chemical composition Al2O3, CaO has strong activity, the use of acid production of water purification agent can save a lot of manpower, electric power, but also a greater cost reduction, process equipment and has a simple, easy operation and other characteristics, is ideal raw material for production of PAC. Alumina dissolution in acid solution rate of 90% or more.
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From:Metal materials
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