Three,functions,stainless,stee business, insurance Three functions of stainless steel seamless tube solid solut
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Solid solution temperature is mainly determined by the chemical composition.Generally speaking, variety and high content of alloy elements brand, solid solution temperature increases accordingly. Especially for high content of manganese, molybdenum, nickel, silicon steel, only improve the solid solution temperature, make it dissolves, can achieve a softening effect. But for stabilized steel, such as 321 stainless steel tube, solid solution at high temperature stabilization element of carbide dissolves in austenite, and precipitates in the grain boundary in the form of Cr23C6 in the subsequent cooling, causing intergranular corrosion. In order to stabilize element of carbide (TiC and NbC) decomposition, solid solution, generally USES the lower solid solution temperature.For stainless steel seamless steel pipe, the three elements of solid solution treatment are temperature, holding time and cooling rate.So what is the function of stainless steel seamless tube solid solution treatment?1: stainless steel seamless tube organization and composition is uniform, which is especially important for raw materials, because for the hot rolled steel tubes parts, different rolling temperature and different cooling speed, causing different organizational structure. Atomic activity increased at high temperatures, the σ phase solubility, chemical composition tends to be more uniform, get uniform single-phase organization after rapid cooling.2: remove the work hardening and continue cold working.Through the solid solution treatment, skew lattice, elongation and breakage of recrystallized grains, eliminate internal stress, the steel wire tensile strength decreased, elongation increased.3: restore stainless steel seamless pipe inherent corrosion resistance.Carbide precipitation and lattice defects caused by cold working can make the stainless steel pipe corrosion resistant performance degradation. Stainless steel seamless tube corrosion resistance after solid solution treatment back to his best.
Three,functions,stainless,stee