Stainless steel plate is a product that is not easy to be corroded. Unless it is some serious situation, it is not impossible to be corroded in any product. If our stainless steel plate is corroded, it is likely to affect its normal use. Therefore, in order to avoid this situation, we need to take some preventive measures. Let’s first understand what are the factors that cause stainless steel plates to be corroded? Electrochemical corrosion The stainless steel sheet is scratched due to contact with carbon steel, and then forms a primary battery with a corrosive medium, which will produce electrochemical corrosion. If the pickling passivation effect is not good, the passivation film on the surface of the plate will be uneven or too thin, which is also prone to electrochemical corrosion, slag cutting, splashing and other rust-prone substances adhere to the plate, and then corrode The medium forms a galvanic cell, leading to electrochemical decay. Pickling and passivation cleaning is not clean, resulting in chemical corrosion products between the residual pickling and passivation solution and the plate, and then forms electrochemical corrosion with the plate. chemical corrosion Under certain conditions, many oils, dust or acids, alkalis, salts, etc. adhering...
The main features of flexible 304 stainless steel sheet are high elongation (≥ 53%), low hardness (≤ 173%) and internal grain grade between 7.0-8.0, excellent deep drawing performance. At present, many enterprises that produce thermos bottles and thermos pots have relatively high processing rates (punching size/product diameter), and their processing rates are 3.1, 1.97, 2.16, and 1.98, respectively. SUS304 DDQ material is mainly used for products with high processing rate requirements. Of course, products with a processing ratio of more than 2.0 usually require several stretches to complete. If the extension of the raw material cannot be achieved, the product will not be able to be produced when processing the deep-drawing product. It is easy to break and penetrate, which will affect the qualified rate of the finished product, and of course increase the cost of the manufacturer. 1. General materials are mainly used for materials other than DDQ, which are characterized by relatively low elongation (≥ 45%), relatively high hardness (≤ 182), and internal particle size grades between 10-11. Compared with DDQ, it has better deep drawing performance and is relatively poor, and is mainly used for products that can be obtained without drawing, such as steel for spoons,...
Metal hardening is the process of making metals such as stainless steel plates stronger. For example, metals such as stainless steel plates used in daily life can be better resistant to wear after hardening. There are different types of metal hardening processes like heat treatment etc. Which method to use depends on the type of metal that will undergo the process and its level of hardness. The hardening process often changes the mechanical properties of metals such as stainless steel sheets. It makes the metal piece harder to wear and also gains strength, making it harder to deform. The metal hardening process may also alter the physical properties of some metals, including their magnetic properties. Surface hardening of metals increases their wear resistance and makes them stronger. Surface hardening involves changing the chemical composition and microstructure of the metal at the surface area. Thermal and chemical hardfacing methods are performed using heat-based and chemical-based processes. Laser heat treatment is a relatively recent surface hardening technique. Quench hardening is a form of heat hardening used on steel and cast iron metals. The process involves heating the metal to a certain temperature, which depends on the percentage of carbon in the steel...
Overview of GH3536 features and application fields: This is a high-iron nickel-based high-temperature alloy mainly solid-solution-strengthened with chromium and molybdenum. It has good oxidation resistance and corrosion resistance, and has medium to high durability and creep strength below 900 ° C. Cold and hot Good formability and weldability. It is suitable for the manufacture of combustion chamber components and other high-temperature components of aero-engines. It can be used for a long time below 900°C, and the short-term working temperature can reach 1080°C. GH3536 similar grades: UNS NO6002 HastelloyX (USA), NC22FeD (France), NiCr22FeMo (Germany), Nimonic PE13 (UK) GH3536 chemical composition: (GB/T14992-2005) Alloy grade % Nickel Ni Chromium Cr Iron Fe Tungsten W Molybdenum Mo Cobalt Co Carbon C Manganese Mn Silicon Si Sulfur S Phosphorus P Copper Cu Aluminum Al Titanium TiGH3536 Minimum balance 20.517.00.28.00.50.05 Maximum 23.020.01.010.02.50.151.01. 00.0150.0250.500.150.5 GH3536 physical properties: Density g/cm3 Melting point ℃ Thermal conductivity λ/(W/m·℃) Specific heat capacity J/kg·℃ Elastic modulus GPa Shear modulus GPa Resistivity μΩ·m Poisson's ratio Linear expansion coefficient a/10-6℃ -18.281295138113.38(100℃)372.6 1.180.312.1(20~100℃) GH3536 mechanical properties: (minimum value of mechanical properties tested at 20°C) Heat treatment method Tensile strength σb/MPa Yield strength σp0.2/MPa Elongation σ5 /% Brinell hardness HBS solution treatment 69027530≥241 GH3536 Production Execution Standards: GH3536 metallographic structure: The structure of the alloy in the solid solution state is austenite matrix, and there are a small amount of TiN and M6C carbides. GH3536 process performance and requirements: 1. The alloy has good cold and hot workability, and the forging heating temperature is 1170°C. 2. The average grain size of the alloy is closely related to the degree of deformation of the forging and the final forging temperature. 3. The alloy has satisfactory welding performance, and can be welded by argon arc welding, seam welding, spot welding and other methods. HGH3536 or HGH3113 welding wire is recommended for argon arc welding.
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