Nickel copper niobium alloy material and application thereof in high strength slender shafts

Abstract

The invention discloses a nickel copper niobium alloy material and an application thereof in high strength slender shafts. The nickel copper niobium alloy material comprises the components by the mass percentage: 65%-70% of Ni, 25%-33% of Cu, 1.0%-2.0% of Nb, 0.5%-1.5% of Fe, 0.5%-1.5% of Mn, 0%-1.5% of Si, 0.3%-1.0% of Ti, and 0%-0.25% of C. In accordance with a Monel alloy ingot casting process, ingots are poured by opening a furnace; then various high strength slender shafts are prepared from the casted ingots according to a high strength slender shaft stretching process, wherein the shafts comprise electrical submersible pump shafts, separator shafts and protector shafts. Compared with high strength slender shafts prepared by a high strength Monel alloy material K500, the various high strength slender shafts prepared by applying the nickel copper niobium alloy material have better corresponding mechanical strengths and have the tensile finished product rate basically equal to K500.

Description

technical field [0001] The present invention relates to the design of the composition of non-ferrous metal materials, especially to the composition design of a nickel-copper-niobium alloy material. The present invention also relates to the application of the material on the shaft of the submersible electric pump, and then extends to all long and thin shafts with high strength requirements. application on the axis. Background technique [0002] Nickel-copper alloy is also called Monel (Monel alloy) in the world. China has not yet formulated the standard of nickel-copper alloy, and all adopt foreign standards. [0003] Monel alloy can be divided into two categories according to its grade and performance, one is ordinary type, represented by Monel400, and the other is high-strength Monel alloy, typified by K500; K500 is based on Monel400 Developed, its tensile strength is greatly improved compared with Monel400, the key lies in the change and adjustment of its composition, an ...

AI Technical Summary

Problems solved by technology

[0004] With the development of the global deep well drilling industry, the consumption of the shaft of the key components of the submersible electric pump has also increased significantly, especially with the deteriorating environment and conditions of oil drilling, the use of various shafts lifespan is getting shorter

In K500, the addition of aluminum not only improves the strength, but also reduces the elongation of the product. When excessive aluminum is added, although the strength of the material is further improved, the tensile formability of the material is greatly reduced. The tensile scrap rate is high, which cannot meet the normal production needs