Abstract: In the ultraprecision vibration isolation systems, it is desirable for the isolator to have a larger load bearing capacity and a broader isolation bandwidth simultaneously. Generally, pneumatic spring can bear large load ...

Abstract: Centrifugal cast 25Cr35Ni–Nb alloy furnace tubes with different contents of S are selected to investigate effects of S addition on creep and fracture behavior. Rupture tests in air at 1100 آ°C and 17 MPa and slow ...

Abstract: Carburization phenomena of the ethylene pyrolysis furnace tube made of 25Cr35NiNb alloy were investigated after service for approximate 30,000 h in a petrochemical plant. Three different zones, namely, oxidation zone, ...

Abstract: Cracking in 25Cr35NiNb pyrolysis furnace tubes is difficult to detect in engineering production. This paper presents a metal magnetic memory technique for inspecting cracks. To verify the effectiveness of the proposed ...

Abstract: Rapid detection technology of the carburization of Fe–Cr–Ni high-temperature heat-resistant alloys in the ethylene cracking furnace and the hydrogen conversion furnace is in great need to prevent industrial accident. This ...