Heat-resistant steel is a special type of steel that can maintain strength, oxidation resistance and creep resistance in high temperature environments. It is widely used in energy, chemical industry, aerospace and other fields. According to different chemical composition and performance, heat-resistant steel can be divided into many types, each type is suitable for different working conditions. Understanding the classification of Топлинната устойчива стомана помага на компаниите да избират точно материали и да подобрят живота на обслужването и безопасността на оборудването .
Според химическия състав, топлинната стомана е разделена главно на три категории: хром-молибден стомана, аустенитна топлинна устойчива стомана и феритична топлинна стомана е най-често срещаният тип топлинна устойчива стомана .}}}}}}}} е най-често срещаният тип стомана с висока топлинна тембеш strength and oxidation resistance, and is suitable for medium-temperature environments such as boilers and pressure vessels. Austenitic heat-resistant steel uses nickel and chromium as the main alloying elements, such as 310S, 309S and other grades. It has excellent high-temperature oxidation resistance and corrosion resistance and is often used in high-temperature furnace tubes, heat exchangers and other equipment. Ferritic heat-resistant steel has a high chromium content, but a low nickel content, and is relatively low in cost. It is suitable for heating furnaces and combustion chamber components at lower temperatures.
Според характеристиките на температурата на използване и характеристиките на топлината, топлинната стомана може да бъде подразделена на нисколегираща стомана, устойчива на топлина, средно-слепна топлоустойчива стомана и високо-сплотено топлинно устойчиво стомана . ниско-сравнителна топлинна стомана обикновено се използва в условия на работа под 500 градуса, като 15Crmo, 12Cr1mov и т.н. medium-temperature pipelines in the petrochemical and power industries. Medium-alloy heat-resistant steel is suitable for high-temperature environments of 600-800℃, such as 2.25Cr-1Mo steel, which is widely used in hydrogenation reactors and petrochemical equipment. High-alloy Топлинните стомани като серия Inconel (като Inconel 600, 625) и Hastelloy Series могат да поддържат стабилни характеристики във високотемпературни среди над 1000 градуса и се използват главно в полета от висок клас, като двигатели на самолети и газови турбини.
In addition, heat-resistant steel can also be divided into pearlite heat-resistant steel, martensite heat-resistant steel and austenite heat-resistant steel according to the microstructure. Pearlite heat-resistant steel is mainly used in medium-temperature environments, while martensite heat-resistant steel improves strength through heat treatment and is suitable for high-temperature fasteners and other Компоненти .
The classification of heat-resistant steel is complex and diverse. Enterprises need to select appropriate materials according to specific operating temperature, corrosion environment and cost requirements. Correct material selection can not only improve equipment performance, but also reduce maintenance costs, creating greater economic benefits for enterprises.
