Since 2012, we have independently developed a new generation of high-temperature alloy ethylene cracking furnace tubes. By adding AI elements to generate a stable AL2 oxide film, as well as solid solution strengthening and grain boundary purification of W elements and rare precious metal elements, we can automatically form a layer of AL203 oxide film with uniform density and high thermal stability in high-temperature environments, ensuring that the alloy has excellent oxidation resistance, anti carburization and anti coking properties; Adding an appropriate amount of W to gold for solid solution strengthening ensures that the alloy maintains excellent high-temperature mechanical properties at temperatures above 1100 ºC.
Invented NH1949 high-temperature alloy, an aluminum furnace tube material with excellent mechanical properties, anti carburization and anti coking properties. The preparation of NH1949 alloy furnace tubes and static castings with high metallurgical quality and service performance ensures that the NH1949 alloy products leaving the factory have excellent mechanical properties, anti carburization and anti coking properties, which can significantly prolong the coke cleaning cycle of cracking furnace tubes in ethylene production, improve production efficiency, and increase service life.
It is the first 1250ºC fully oxidation resistant and anti coking high-temperature alloy material in China, applied in ethylene cracking furnace tubes, metallurgical direct reduction iron DRI conversion tubes, environmental protection industries, etc;
Breaking through the global challenge of anti coking in cracking furnace tubes in the petrochemical industry, the comprehensive performance has reached the international leading level;
Every year, it can bring economic benefits of over 30 billion yuan to the domestic ethylene industry, and reduce emissions by more than 6 million tons of standard coal;