Development of 15Cr1Mo1V High-pressure Boiler Pipe and Study on Stability of its High-temperature Structure

The 15Cr1Mo1V steel specified as a steel type in relevant Russian standard for hi-pressure boiler pipe.This steel is in possession of rather high heat resistance and high-temperature oxidation resistance, having been widely used in power plants both in China and Russia.Elaborated here in the paper are the main aspects of the 15Cr1Mo1V steel tube, including the manufacturing process, inspection and testing of the ambient mechanical properties, the 4-quarant hardness and the metallographic structure.Moreover the structural consistency of the tube is analyzed.The test results show that both the chemical composition design of and the heat treatment process for the tube are proper, and the product performances are excellent, all the properties as tested are up to the requirements as specified in Specification ТУ 14-3P-55-2001;micro-structure of the finished tube is F+B, being homogeneous, and free of any yellow block structure;and at high temperature the tube presents satisfactory structural stability.