The total heat transfer coefficient of the metal, in addition to the thermal conductivity of the metal, depends on other factors. In most cases, the film heatsink, rust and metal surface conditions. The stainless steel plate keeps the surface clean and therefore has better heat transfer than other metals with higher thermal conductivity. Stainless steel provides eight, the technical standards of stainless steel plate corrosion resistance of stainless steel plate, bending performance and welding parts toughness, as well as the welding parts of the stamping process of high performance stainless steel plate and its manufacturing methods. Specifically, Si, Mn, P, S, Al and Ni containing C: 0.02% or less, N: 0.02% or less, Cr: 11% or more and less than 17%, and satisfying 12? Cr Mo 1.5Si? Stainless steel plate heated to 850 to 1250 ° C, and then subjected to heating at a temperature of 1 ° C / s (manufactured by Nippon & lt; RTI ID = 0.0 & gt; The above cooling rate is cooled by heat treatment. This can be a high strength stainless steel plate with a structure with a volume fraction of more than 12%, a high strength, corrosion resistance and bending workability of 730 MPa or more, and excellent toughness of the weld heat affected zone. And then use the Mo, B, etc., can significantly improve the stainless steel plate welding parts of the stamping processing performance. Oxygen plus gas flame can not cut stainless steel plate because stainless steel is not easy to be oxidized.
1. X. Iron-based stainless steel plate The main alloying element in the ferrite stainless steel plate is chromium. When the steel contains more than 12% chromium and then contains other elements of stable ferrite, the steel structure This is ferrite, the organization at room temperature is also ferrite. The structure of the ferrite stainless steel plate determines its strength is not too high, and can not be strengthened by the heat treatment method, the steel has a certain plasticity, but the brittle. Ferritic stainless steel plate on the oxidation of nitric acid and other media have good corrosion resistance. And with the increase in chromium content, the ability of its antioxidant medium corrosion also increased. The corrosion resistance in the reducing medium is poor. In the chloride-containing medium has a good resistance to stress corrosion cracking ability.
2. Martensitic stainless steel plate Martensitic stainless steel plate contains 12% · 18% of the chromium element, and according to the use of conditions to adjust its carbon content, generally 0.1% to 0.4%, for the use of tools, The amount of up to 0.8% a 1. Q%. And some also need to add a certain amount of nickel, platinum and other alloying elements. The martensitic stainless steel plate can undergo phase change during heating, so that its mechanical properties can be adjusted over a wide range by heat treatment, which allows the martensitic stainless steel plate to be used in the manufacture of components with higher strength requirements. Martensitic stainless steel plate in the inorganic acid, organic acids and organic acid salts have good corrosion resistance. In sulfuric acid, hydrochloric acid, hot nitric acid in the corrosion resistance is poor.
3. Austenitic stainless steel Austenitic stainless steel plate contains high chromium, generally greater than 18%, containing about 8% nickel, and some manganese (Mn) to replace part of the nickel, in order to further improve the corrosion resistance, there are (Ti), Ni (Nh) and other alloying elements. Austenitic stainless steel plate and ferritic stainless steel plate similar to the heating does not occur when the phase change, can not strengthen the mechanical properties by heat treatment, its strength is low, plasticity, high toughness. Austenitic stainless steel plate corrosion resistance than martensitic stainless steel plate is good, chromium a nickel austenitic stainless steel plate on the oxidizing medium corrosion resistance, platinum, copper, silicon austenitic stainless steel plate in sulfuric acid is better Corrosion resistance. Stabilized element Chin or Ni austenitic stainless steel plate has good resistance to intergranular corrosion. Improve the austenitic stainless steel plate in the chromium, phase, nickel, nitrogen, can improve the resistance to corrosion resistance.