Stainless steel plate is generally the general name of stainless steel plate and acid resistant steel plate. It came out at the beginning of this century. The development of stainless steel plate has laid an important material and technical foundation for the development of modern industry and scientific and technological progress. There are many kinds of stainless steel plates with different properties.
It has gradually formed several categories in the process of development. According to the structure, it is divided into four categories: austenitic stainless steel plate, martensitic stainless steel plate (including precipitation hardening stainless steel plate), ferritic stainless steel plate, and austenitic plus ferritic duplex stainless steel plate?
According to the main chemical composition in the steel plate or some characteristic elements in the steel plate, it is divided into chromium stainless steel plate, chromium nickel stainless steel plate, chromium nickel molybdenum stainless steel plate, low-carbon stainless steel plate, high molybdenum stainless steel plate, high-purity stainless steel plate, etc.
According to the performance characteristics and uses of steel plates, they are divided into nitric acid resistant stainless steel plate, sulfuric acid resistant stainless steel plate, pitting corrosion resistant stainless steel plate, stress corrosion resistant stainless steel plate, high-strength stainless steel plate, etc.
According to the functional characteristics of steel plate, it is divided into low-temperature stainless steel plate, non-magnetic stainless steel plate, free cutting stainless steel plate, superplastic stainless steel plate, etc. At present, the commonly used classification method is to classify the steel plate according to the structural characteristics of the steel plate, the chemical composition characteristics of the steel plate and the combination of the two. It is generally divided into martensitic stainless steel plate, ferritic stainless steel plate, austenitic stainless steel plate, duplex stainless steel plate and precipitation hardening stainless steel plate, or into chromium stainless steel plate and nickel stainless steel plate.
Pulp and paper equipment, heat exchanger, mechanical equipment, dyeing equipment, film processing equipment, pipeline, external materials of buildings in coastal areas, etc.
The corrosion resistance of stainless steel mainly depends on its alloy composition (chromium, nickel, titanium, silicon, aluminum, manganese, etc.) and internal structure.
According to the preparation method, it can be divided into hot rolling and cold rolling. According to the structural characteristics of steel grade, it can be divided into 5 categories: Austenitic type, AUSTENITIC FERRITIC type, ferritic type, martensitic type and precipitation hardening type.
Stainless steel plate has smooth surface, high plasticity, toughness and mechanical strength, and is resistant to corrosion of acid, alkaline gas, solution and other media. It is a kind of alloy steel that is not easy to rust, but it is not absolutely rust free. Stainless steel plate has the ability to resist general corrosion similar to unstable nickel chromium alloy 304. Prolonged heating in the temperature range of chromium carbide may affect the corrosion resistance of alloys 321 and 347 in harsh corrosive media.
It is mainly used for high temperature applications. High temperature applications require strong sensitization resistance to prevent intergranular corrosion at lower temperatures.
For annealed stainless steel, first remove the black skin with ng-9-1 chemistry, and for those with oil stain, first remove the oil with nz-b degreasing king → water washing → electrolytic fine polishing (this solution is directly used as working fluid, the temperature is 60 ~ 80 ℃, the workpiece is hung with anode, the current Da is 20 ~ 15A / DM2, and the cathode is lead antimony alloy (including antimony 8%). Time: 1 ~ 10 minutes, Polishing → water washing → film stripping with 5 ~ 8% hydrochloric acid (room temperature: 1 ~ 3 seconds) → water washing → blow dry.
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