In nature, the main nickel mines is the red nickel (nickel arsenide) the gersdorffite (sulfur nickel arsenide). Nickel is a silvery white metal powder used extensively for the manufacture of alloys. Adding nickel in the steel, the mechanical strength can be improved.
Nickel content as the steel contains from 2.94% to 7.04%, the tensile strength from 52.2 kg / mm 2 increased to 72.8 kg / mm 3. Nickel steel is used to manufacture the machine under greater pressure to bear impact and reciprocating load in parts, such as turbine blades, crankshaft, connecting rod. Containing 36% nickel, carbon content of 0.3-0.5% nickel steel, its expansion coefficient is very small, almost no thermal expansion and contraction, used to manufacture a variety of precision machinery, precision gauge. Containing 46% nickel, 0.15% carbon high nickel steel, called platinum-based, because its coefficient of expansion is similar with the platinum, glass similar such high nickel steel may be welded to the glass. Bulb production is very important, can be used as a substitute for the platinum wire. The precision lens frame, with this class of platinum steel do due to thermal expansion and contraction, the lens will not fall from the box. Alloy composed of 67.5% nickel, 16% iron, 15% chromium, 1.5% manganese, with a great resistance, is used to manufacture various varistor and heater.
Nickel is used extensively for the manufacture of alloys. Adding nickel in the steel, the mechanical strength can be improved. Ultrafine nickel power,commonly used as catalist in the chemical industry.
Titanium-nickel alloy has the ability of the memory, and memory is very strong, after quite a long time, repeated millions of times are accurate. Its "memory" skills is to remember its original shape, so people call it a shape memory alloy. That this alloy has a characteristic transition temperature, above the transition temperature, it has the structure of a tissue, under the transition temperature, it has an another organizational structure. The structure is different, the performance is also different. For example: a nickel titanium memory alloy, when it is above the transition temperature, it is hard, high strength, and below this temperature, it is very soft and easy cold working. When we need it to remember the shape, put it into the kind of shape, this is the "permanent memory" shape below the transition temperature, because it is very soft, we can to a large extent to its arbitrary deformation. When you need to restore it to its original shape just make it heated to above the transition temperature.
Nickel are with magnetic and can be attracted by a magnet. And use aluminum, cobalt and nickel to make alloy, the magnetic is stronger. This alloy by electromagnets attract not only they will be sucked, and hanging something six times heavier below it, will not fall. In this way, you can use it to create electromagnetic crane.Nickel salts are mostly green. Nickel hydroxide is a brown-black, nickel oxide is gray and black. The alkaline storage battery of nickel oxide used to produce an iron-nickel.
Divalent nickel ions commonly use dimethylglyoxime to identify, in the ammonia solution, nickel ions (Ni2 +) the dimethylglyoxime (Dimethylglyoxime) generates bright red precipitate (Ni (dmgH) 2).
Source:http://www.mhcmp.com
The application of tungsten in various industries
Steel Industry Most of tungsten applied in the production of special steels. The widely used high-speed steel was containing 9-24% of tungsten, 3.8-4.6% of chromium, 1-5% of vanadium, 4-7% of cobalt, 0.7-1.5% of carbon.
Magic effects of coconut oil
According to records, coconut oil can be regarded as the nobility of skin care plant extracts. It was rich in exotic tension of tropical plants, which can enhance the contractile force of the pores, perfectly beautify and nourish the skin.
The Evolution and Impact of Abamectin and Emamectin Benzoate in Pest Control
Abamectin and its derivative, emamectin benzoate, have emerged as pivotal substances in the realm of pest control, offering a broad-spectrum efficacy against various pests while maintaining a favorable environmental profile. As the agricultural industry continues to evolve, these compounds have adapted to meet the growing challenges of pest resistance, expanding their market applications and maintaining cost-effectiveness despite rising production costs.
