Pure nickel N4, N6 seamless tube capillary
Pure nickel alloy -Shanghai Yegang Metal Group Co., Ltd.-Shanghai Yegang Metal Group Co., Ltd. Click to learn more
◆ Pure nickel N4, N6 seamless tube Product size range:
◆ Pure nickel N4, N6 seamless tube Chemical composition:
◆ Pure nickel N4, N6 seamless tube Implementation standard:
◆ Pure nickel N4, N6 seamless tube Greenhouse mechanical properties:
N6 is a nickel mass fraction at 99. More than 5% pure nickel material. Pure nickel has good mechanical properties and corrosion resistance, as well as excellent plastic processing properties, compared with nickel-based alloys pure nickel has higher electrical conductivity, thermal conductivity and plasticity. At the same time, it can be processed into a variety of different shapes of products, which are widely used in the fields of chemicals, electroplating and electronics. Rheological stress is an important factor affecting the change of metal plastic deformation rolling pressure, and the determination of metal plane deformation rheological stress can correctly reveal the change of material microstructure and properties and plastic deformation law during hot rolled plastic deformation. At present, the research on pure nickel mainly focuses on the study of nickel-based alloys and the cold deformation behavior of pure nickel, the simulation of the dynamic recrystallization process of pure nickel, the research on the cold deformation behavior of pure nickel, the deformation energy storage of industrial pure nickel, and the study of microhardness and microstructure of cold-rolled pure nickel. However, there are few studies at home and abroad on the thermal deformation behavior of pure nickel.
Pure nickel N6 thermoform plastic processing diagram
The machining diagram is a method developed by Parasad and others based on dynamic material models to evaluate the thermal processing properties of materials. This method can accurately describe the process of high-temperature plastic deformation of metals. The relationship between tissue evolution and deformation parameters. At the same time, the established thermoforming plastic processing diagram can intuitively show the rheological instability zone and reasonable processing zone during metal thermal deformation. Thus providing a theoretical basis for formulating reasonable metal heat deformation parameters.
Nickel-based alloy refers to an alloy with nickel as the matrix, composed of copper, chromium, molybdenum and other elements, usually at 650 ~ 1000 °C with high strength and oxidation and corrosion resistance. This alloy has been widely used in marine, environmental protection, energy, petrochemical and food fields due to its excellent comprehensive performance and resistance to various acid corrosion and stress corrosion capabilities. The reason why nickel-based alloys have excellent oxidation resistance is inextricably related to matrix Ni. Pure nickel has good mechanical properties, easy to cold work, its processing performance is similar to that of low carbon steel, is widely used in plate heat exchangers, alkali and chemical equipment and other fields. N4 has been used in environments up to 1230 °C, and exhibits good corrosion resistance in both acidic and alkaline environments.
Pure nickel is divided into two types: processing pure nickel and electroplated nickel. Among them, the processing of pure nickel is divided into No. 2 nickel, No. 4 nickel, No. 6 nickel, No. 7 nickel and No. 8 nickel according to its nickel content. The varieties supplied are No. 2 nickel and No. 4 nickel for plate and strip; No. 6 nickel and No. 7 nickel are mainly sheet and strip, foil, pipe, bar and wire; Nickel No. 8 supplies plates, bars and wires. Processing pure nickel has excellent performance, so it is widely used in many industries, such as electronics, machinery and equipment manufacturing, chemical and chemical industries, but also for some corrosion-resistant structural parts and other aspects of the manufacturing, in addition to nickel is also a welding wire welding rod must be added to the metal raw material. GB/T6516.1997 standard is the national standard for processing pure nickel in the mainland.
N6 is a kind of pure nickel also known as No. 6 nickel, of which ni and Co content is greater than 99.5%, other impurity content is not higher than 0.5%, N6 has acid and alkali resistance characteristics, stable performance in the atmosphere and ocean, while having better processing performance, higher electric vacuum performance, so N6 is widely used in chemical and chemical, mechanical and electronics and other industries, N6 can be processed into strip, wire, foil and other products.
Pure nickel alloy N4 corrosion properties
(1) The higher the heat treatment temperature, the weaker the corrosion resistance of N4. The self-corrosion potential and pitting potential of N4 without heat treatment are -0.55 V and 0.254 V, respectively, which are higher than the relevant values of N4 after heat treatment at different temperatures. After heat treatment at 200°C, N4 has the largest corrosion reaction resistance and double-layer resistance in 3.5% NaCl solution, is smaller after heat treatment at 300°C, and is smallest after heat treatment at 400°C. After 15 days of immersion in 3.5% NaCl solution, the unheated N4 is predominantly porosity. The higher the heat treatment temperature, the more corrosion products are generated on the surface of N4, and the corrosion products change from dendrite to flocculent, and the corrosion form gradually turns to local corrosion.
(2) N4 has the greatest corrosion tendency and the highest corrosion rate in 5% NaCl solution, that is, the higher the Cl-solubility, the worse the corrosion resistance of N4. When N4 is immersed in three different concentrations of NaCl solution, the corrosion rate in 1% NaCl solution is small, the corrosion rate in 3.5%, 5% NaCl solution is relatively large, and its self-corrosion potential in 1% NaCl solution is the highest, -0.526 V; The self-corrosion potential in 3.5% NaCl solution is the second, -0.640 V; The lowest self-corrosion potential in 5% NaCl solution is -0.731 V. Corrosion weight loss of N4 in 5% NaCl solution is up to about 20 mg, corrosion loss in 1% NaCl solution is at least about 16 mg, and corrosion loss difference is 4 mg. And the higher the Cl-concentration, the greater the number of corrosion holes on the surface of the N4 specimen, the larger the corrosion pore size, and even the local corrosion phenomenon in the 5% NaCl solution.
(3) N4 has the greatest corrosion tendency and the highest corrosion rate in 15% NaOH solution, that is, the higher the OH-concentration, the more serious the corrosion of N4. When N4 is immersed in three different concentrations of NaOH solution, OH- enriches on the surface of the N4 specimen as the immersion time increases, resulting in accelerated corrosion and increased corrosion rate. N4 has the smallest arc capacitance in 15% NaOH solution, followed by 10% NaOH solution, and the largest in 5% NaOH solution. Corrosive behavior occurs in NaOH solutions after 5 days of immersion in different concentrations of NaOH solution, the higher the OH- concentration, the greater the corrosion weight loss, up to about 17 mg in 15% NaOH solution, at least about 13 mg in 5% NaOH solution, and a corrosion loss difference of 4 mg. And the higher the OH-ion concentration, the more corrosion pits and corrosion products on the surface of the specimen.
(4) Compared with OH-, Cl- has a greater impact on the corrosive behavior of N4. N4 Lost weight by approximately 20.37 mg more in 5% NaCl solution and approximately 15.17 mg less in 5% NaOH solution after 5% NaCl and 5% NaOH solutions, with a corrosion weight loss difference of 5.2 mg. In 5% NaCl solution, there are more corrosion holes on the surface of N4, and there are deep holes and cracks locally, in 5% NaOH solution, the surface corrosion of the specimen is not obvious, only a small amount of impurities remain on the surface, and in the 5% NaOH solution, the corrosion of the specimen is relatively weak.
About the pure nickel alloy N6 welding process
(1) The use of wire filler plasma welding can achieve N6 pure nickel welding, can achieve no opening, single-sided welding double-sided molding, to obtain a well-formed, full appearance of the weld.
(2) There is no essential difference between the phase composition of the N6 nickel alloy plasma welding and the non-filled plasma weld weld area of the ERNi-1 weld wire filling and the base metal, and the filling ERNi-1 welding wire is more conducive to eliminating the thermal cracking and porosity tendency in the nickel alloy welding process.
(3) The tensile performance of N6 wire-filled plasma welding joints is obviously better than that of non-filled joints, the wire-filled joints have uniform organization, fine grains, tensile strength of 333Mpa to 97.6% of the base metal, elongation is 57%, and fracture is in the heat affected zone; The tensile strength of the unfilled joint is 240Mpa, which is only 70.5% of the base metal, the elongation is 23%, and the fracture is in the center of the weld.
(4) The microhardness of the weld area of the N6 wire-filled joint is significantly higher than that of the non-filled joint weld, mainly due to the refinement of the grains in the weld area of the wire-filled joint, resulting in an increase in the microhardness of the weld area.
The grades are; N4 N6 N02201 N02200。
Delivery status; M Hot working state. R Cold working state. Y annealed ultrasonic flaw detection.
tolerances; H7-H9 h7-h9
Specifications; Nickel plate; Thickness (0.5-20.0mm) Width (200-1000mm) Length (500-2000mm)
Nickel rods; Diameter 6-200mm*L
Nickel strip / nickel foil thickness (0.03-2mm) * width (1.5-300mm) * length L
Nickel tube; Diameter (3-110mm) * Wall thickness (0.8-8mm) * Length (200-8000mm)
Nickel wire: diameter 1.0/2.0/3.0/4.0mm*L
Nickel crucible: volume 10-300ml, integral, straight or trapezoidal, can be customized according to customer requirements.
Implementation of standards; GB/T2072-93 GB2054-80 GB/2882-84 GB/8011-87 GB3120-82 GB4435-84.
Widely used; Petroleum, chemical, electronic, mechanical equipment, sports equipment, scientific research field.
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Nickel is a hard, ductile and ferromagnetic metal that is highly polished and corrosion resistant. Nickel is an iron-loving element. The core of the Earth is mainly composed of iron and nickel. In the crust, ferromagnesite rocks contain more nickel than silicon aluminum rocks, such as peridot rocks contain 1000 times more nickel than granite, and gabbro contains 80 times more nickel than granite.
On October 27, 2017, the World Health Organization's International Agency for Research on Cancer released a preliminary list of carcinogens for reference, nickel compounds in the list of carcinogens, metal cobalt, metal nickel and alloy powder containing 66-67% nickel, 13-16% chromium and 7% iron implanted in the body foreign bodies, nickel metal and nickel alloy in the list of class 2B carcinogens.
Discover a brief history
Meteorites contain iron and nickel, which were used as fine iron in the early days. Because the metal does not rust, it was considered silver by the natives of Peru. An alloy containing zinc nickel called white copper was used in China in 200 BC. Some even extend to Europe.
In 1751, Alex Fredrik Cronstedt, working in Stockholm (the capital of Sweden), studied a new metal called red arsenic nickel (NiAs) from Helsingland, Sweden. He thought it contained copper, but what he extracted was a new metal that he announced and named Nickel (nickel) in 1754. Many chemists believe it is an alloy of cobalt, arsenic, iron and copper — elements that appear in trace amounts of contaminants. It was not until 1775 that pure nickel was produced by Torbern Bergman, which confirmed that it was an element.
Mineral distribution
The world's laterite nickel ore is distributed in tropical countries within 30 degrees north and south of the equatorial line, and concentrated in the tropical-subtropical regions of the Pacific Rim, mainly including: Cuba and Brazil in the Americas; Indonesia and the Philippines in Southeast Asia; Australia in Oceania, New Caledonia, Papua New Guinea, etc. The distribution of nickel ore in China is mainly distributed in the northwest, southwest and northeast, and its retained reserves account for 76.8%, 12.1% and 4.9% of the country's total reserves, respectively. In terms of provinces (regions), Gansu has the largest reserves, accounting for 62% of the country's total nickel reserves, followed by Xinjiang (11.6%), Yunnan (8.9%), Jilin (4.4%), Hubei (3.4%) and Sichuan (3.3%). Among them, the copper-nickel symbiosis deposit in Jinchang, Gansu Province, has huge nickel resource reserves, second only to the Sudbury nickel mine in Canada, ranking second in the world and the first in Asia.
Physical
Has good ductility and has medium hardness.
Nickel is a silvery-white metal with magnetic properties and good plasticity. With good corrosion resistance, nickel is approximately silvery-white, hard and ductile and ferromagnetic metal elements, it can be highly polished and corrosion resistant. After dissolving in nitric acid, it appears green. Mainly used in alloys (e.g. nickel steel and nickel silver) and as a catalyst (e.g. Lanni nickel, especially as a catalyst for hydrogenation) [3]
Density: 8.902g/cm3 [2]
Melting Point: 1453°C [2]
Boiling point: 2732°C [2]
Chemical properties
The peripheral electron arrangement is 3d84s2, which is located in the fourth cycle of group VIII. Chemically more reactive, but more stable than iron. At room temperature, it is difficult to oxidize in the air and is not easy to react with concentrated nitric acid. Fine nickel wire is flammable, reacts with halogen when heated, and dissolves slowly in dilute acids. It can absorb a considerable amount of hydrogen. [2]
Nickel is insoluble in water, and at room temperature, a dense oxide film is formed on the surface of moist air, which can prevent the body metal from continuing to oxidize. It can be slowly dissolved in dilute acids, releasing hydrogen gas and producing the green positive divalent nickel ion Ni2+; Resistant to strong alkalis. Nickel can burn in pure oxygen, emitting a dazzling white light. Similarly, nickel can be burned in chlorine and fluorine. There is no reaction to the oxidant solution, including nitric acid. Nickel is a medium strength reducing agent. Nickel hydrochloric acid, sulfuric acid, organic acid and alkaline solutions are extremely slow to impregnate nickel. Nickel dissolves slowly in dilute nitric acid. Fuming nitric acid can passivate the nickel surface and be corrosion resistant. Nickel, like platinum and palladium, can absorb a large amount of hydrogen when passivated, and the smaller the particle size, the greater the absorption amount.
Important salts of nickel are nickel sulfate and nickel chloride. Nickel nitrate is also commonly used in laboratories, with crystalline water, the chemical formula is Ni(NO3)2·6H2O, green transparent particles, easy to absorb water vapor in the air. Similar to iron and cobalt, it is more stable to water and air at room temperature, and can resist alkaline corrosion, so nickel calcination barium can be used to melt alkali in the laboratory. Nickel sulfate (NiSO4) can form alum Ni(SO4)₂·6H2O (MI is alkali metal ion) with alkali metal sulfate. +2 valent nickel ions can form coordination compounds. Under atmospheric pressure, nickel reacts with carbon monoxide to form a highly toxic tetracarbonyl nickel (Ni(CO)4), which decomposes into metallic nickel and carbon monoxide when heated. [4]
Metal radius 124.6 skinned rice [2]
First ionization energy: 741.1kJ/mol [2]
Electronegativity: 1.8 [2]
Main oxidation numbers: +2, +3, +4 [2]
Nickel (II.) compound
1. Nickel oxide: NiC2O4=NiO+CO+CO2
2. Nickel hydroxide: Ni2++2OH-=Ni(OH)2
3. Nickel sulfate: 2Ni+2H2SO4+2HNO3=2NiSO4+NO2+NO+3H2O
NiO+H2SO4=NiSO4+H2O
NiCO3+H2SO4=NiSO4+CO2+H2O
4. Nickel halide: NiF2, NiCl2, NiBr2, NiI2
Nickel (III.) compound
1. Oxidize high nickel
4NiO+O2=2Ni2O3
2Ni(OH)2+Br2+2OH-=Ni2O3+2Br-+3H2O
2Ni2O3+4H2SO4=4NiSO4+O2+4H2O
Ni2O3+6HCl=2NiCl2+Cl2+3H2O
2. High nickel hydroxide
4NiCO3+O2=2Ni2O3+4CO2
2Ni(OH)2+NaClO+H2O=2Ni(OH)3+NaCl
2Ni（OH）3+6HCl=2NiCl2+Cl2+6H2O
Complexes
1. Ammonia coordination compound: [Ni(NH3)6]2+
2. Cyanogen coordination compound: [Ni(CN)4]2-
Chelate: [Ni(en)3]2+
4. Carbonyl coordination compounds
(a)Ni(CO)4;
(b)(C2H5)2N