In the modern industrial field, heat-resistant steel, as a key material, is widely used in high-temperature operating scenarios such as energy, chemical industry, aerospace, etc.Its excellent high-temperature strength, oxidation resistance and creep resistance make it the core choice to ensure the long-term and stable operation of equipment. With the upgrading of global industrial technology, the market demand for heat-resistant steel continues to grow, especially in the manufacture of high-temperature and high-pressure equipment.
The core value of heat-resistant steel lies in its ability to maintain structural integrity at extreme temperatures. Unlike ordinary steel, heat-resistant steel forms a dense oxide film by adding alloy elements such as chromium, nickel, and molybdenum, which effectively resists high-temperature oxidation and corrosion. For example, heat-resistant steel with a chromium content of more than 12% can form a stable Cr₂O₃ protective layer in an environment above 800°C, significantly extending the life of the equipment. In addition, the addition of molybdenum can improve the high-temperature strength of the material, making it suitable for ultra-high temperature conditions such as boilers and gas turbines.
From the perspective of application scenarios, the demand for heat-resistant steel is mainly concentrated in the fields of power, petrochemicals and automobile manufacturing. In the power industry, supercritical and ultra-supercritical coal-fired units have higher requirements for the performance of heat-resistant steel. Their operating temperatures generally exceed 600°C, requiring materials with both high strength and thermal fatigue resistance. In the petrochemical industry, hydrogenation reactors and catalytic cracking units rely on heat-resistant steel to deal with sulfide corrosion and high-temperature hydrogen embrittlement. The lightweight trend of new energy vehicles also promotes the popularity of heat-resistant steel in turbochargers and exhaust systems.
At present, the global heat-resistant steel market is technology-driven. On the one hand, new heat-resistant steels such as austenitic heat-resistant steel and ferritic heat-resistant steel have further improved their high-temperature performance by optimizing their composition design; on the other hand, the application of 3D printing technology makes it possible to manufacture heat-resistant steel parts with complex structures. However, the industry still faces challenges, such as fluctuations in raw material costs and dependence on imports for high-end products.
In the future, with the advancement of the "dual carbon" goal, heat-resistant steel will play a greater role in emerging fields such as hydrogen storage and transportation, nuclear power generation, etc. Enterprises need to continue to focus on material innovation and process upgrades to meet the sustainable development needs of high-temperature industries.
