压力容器高合金钢中大都为奥氏体不锈钢,为具有抵抗大气、酸、碱、盐等腐蚀

Most of the high-alloy steels for pressure vessels are austenitic stainless steels, which are high-alloy steels that resist corrosion from the atmosphere, acids, alkalis, and salts. The most commonly used pressure vessels are austenitic stainless steels. When the carbon content of austenitic stainless steel is ≤0.03%, the single-phase austenite structure is very stable and the corrosion resistance is high; when the carbon content is >0.03%, the carbon exceeds the carbon capacity of the austenite and the corrosion resistance Decrease, it will lead to intergranular corrosion, pitting corrosion and stress corrosion cracking along the intergranular type. This is the biggest disadvantage of austenitic stainless steel. Reduce the carbon content or add Ti, Nb and other strong carbide forming elements to fix the carbon and perform solid solution Treatment can homogenize the austenite composition and inhibit the formation of high chromium carbides, which can significantly improve the corrosion resistance.

Most of the high alloy steel pressure vessels are Austen stainless steel, for high alloy steel with resistance to atmospheric, acid, alkali, salt and other corrosion effects, the most used in pressure vessels is Austen stainless steel. When the carbon content of austry stainless steel ≤0.03 percent, single-phase Austella tissue is very stable, corrosion resistance is very high, when the carbon content of >0.03 percent, carbon exceeds Austella's carbon capacity, corrosion resistance is reduced, will lead to intercrystalline corrosion, Point corrosion and stress corrosion cracking along the intercrystalline type, which is the biggest disadvantage of Austromal stainless steel, reduce carbon content or add Ti, Nb and other strong carbides to form elements of fixed carbon, solidified treatment, so that Austellan composition homogenization, inhibit the formation of high chromium carbides, Can significantly improve corrosion resistance.

Most of the high alloy steel for pressure vessel is austenitic stainless steel, which can resist the corrosion of atmosphere, acid, alkali, salt, etc. When the carbon content of austenitic stainless steel is less than or equal to 0.03%, the microstructure of single-phase austenite is very stable and the corrosion resistance is very high; when the carbon content is more than 0.03%, the carbon content exceeds the carbon capacity of austenite, and the corrosion resistance is reduced, which will lead to intergranular corrosion, pitting corrosion and stress corrosion cracking along intergranular, This is the biggest disadvantage of austenitic stainless steel. Reducing carbon content or adding Ti, Nb and other strong carbides to form fixed carbon and solid solution treatment can homogenize the austenite composition and inhibit the formation of high chromium carbide, which can significantly improve the corrosion resistance.<br>