PREPARATION METHOD FOR NICKEL-MOLYBDENUM CORROSION-RESISTANT ALLOY SEAMLESS PIPE AND PREPARED SEAMLESS PIPE

The present invention relates to the technical field of seamless pipe machining, and in particular to a preparation method for a nickel-molybdenum corrosion-resistant alloy seamless pipe and the prepared seamless pipe. The weight proportions of components of the nickel-molybdenum corrosion-resistant alloy are: C≤0.01%, Si≤0.10%, Mn≤3.0%, Cr≤3.0%, Mo (26.0-32.0)%, Ni≥65.0%, W≤3.0%, with the balance being trace elements. According to the present invention, a process of cladding hot extrusion in combination with cold rolling is used, and a machining process is optimized, so that the outer diameter of the prepared nickel-molybdenum corrosion-resistant alloy seamless pipe is generally not larger than 100 mm, the wall thickness is not larger than 8 mm, and the pipe structure has good uniformity, mechanical properties, and corrosion resistance, and high yield, can be used in the fields of chemistry, petrochemistry, energy manufacturing, pollution control, etc., and has wide market application prospects. In addition,