Rare metals have various excellent properties, thus in economic sectors and in all areas of modern science and technology (such as aerospace, energy, electronics, chemicals, etc.), has played an increasingly important role.
In some areas, the application of rare metal materials had even become the main factor to promote a certain stage of development. In aviation and aerospace technology, due to the application of titanium material which have small density, high strength, so that the manufacturing of spacecraft and aircraft supersonic Mach large is possible.
Nickel’s reserves on Earth are rarely, only around six hundredths of the iron, and Ni is mixed with a variety of elements, is not easy to extract, so nickel is relatively expensive. Nickel is important material for high-temperature alloy, have unique corrosion resistance and a "sauce" can significant improve the performance of steel and other metals, have widely used.
Nickel is a silvery-white metal, the density is 8.9g/cm3, melting point is 1455, with a face-centered cubic lattice, high strength, good ductility, poor thermal conductivity, greater resistivity. In the air, water, sea water, a lot of salt solution, organic medium particularly various lye, due to the nickel surface formed a passivation film protective layer, its corrosion resistance is strong, its resistance to sea water and hot alkali corrosion is outstanding in metals. Pure nickel is used for magnetic materials and making stainless steel alloy, also used for electric vacuum parts and corrosion-resistant parts.
Nickel powder used as the metal binding agent in the diamond tool. According to metal powder supplier, nickel powder is used as a substitute for high price cobalt powder. Metal matrix alloy powder: metal binding agent is a decision key factor of diamond saw blade, blade, grinding wheel, core drill and other products, after the diamond determined, the quality of the metal binding agent became the determinants, cobalt powder and nickel powder can be used as the main binder, but the cobalt powder with higher prices.
The diamond drill bits, cutting discs, oil and gas mining diamond drill bits, carbide drill carcass bonding material used in building industry are mostly used nickel powder; the tools of metal material processing, automobiles, motorcycles and other mechanical polishing process were mostly uses diamond abrasives, its carcass material is also used nickel powder. Including carbonyl nickel powder, electrolytic nickel powder and reduction nickel powder.
Nickel alloys are formed of adding the copper, chromium, aluminum, tungsten, titanium, aluminum to nickel, used in high temperatures, resist corrosion conditions. Ni-Cu type alloy also known as Monel, no low-temperature brittleness, non-magnetic, good weldability, easy for cooling and heating forming. It is very suitable for producing cryogenic equipment, high-temperature alkali resistance, sea water resistance and hydrofluoric acid etching equipment, such as heat exchangers, reactors, containers, elastic parts. Ni-Cr alloy also known as inconel alloys, welding, hot and cold formability and corrosion resistance are good, and have excellent resistance to high temperature oxidation resistance, corrosion resistance to nitric acid is outstanding. Mainly used in the force components and equipment which work in high temperature, also can be made corrosion-resistant parts, such as heaters, evaporators nuclear power, electric wire, condenser, nitric acid production equipment corrosion-resistant parts and about 1000 working temperature structural parts, such as jet turbine blades and gas turbine nozzles. Ni-Mo type alloy also known as Hastelloy, both have high-temperature corrosion resistance and excellent high temperature mechanical properties, can work under higher temperature and stress, acid corrosion resistance is outstanding. It commonly used in resist hydrochloric acid and other corrosion equipment parts and about 650 long-term work equipment parts.
Source:http://www.mhcmp.com
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