A kind of preparation method of zirconium compound doped high-temperature corrosion-resistant nickel-based alloy

Abstract

The invention relates to a preparation method of a zirconium compound-doped high-temperature corrosion-resistant nickel-based alloy. The technology of adding zirconium oxide, vanadium oxide and carbon in a certain proportion to the nickel-based alloy is used to realize the carbon dioxide in the high-temperature molten pool under vacuum conditions. React with zirconia and vanadium oxide to form part of zirconium carbon compound and vanadium carbon compound evenly dispersed in the alloy, so that the prepared nickel-based alloy maintains good strength at high temperature and has excellent alkali corrosion resistance. The process is simple and the process is simple. The cost is low, and the prepared alloy can be used for a long time in a corrosive environment at a high temperature of 1000°C. It has the characteristics of high temperature resistance and alkali corrosion resistance, and can be widely used in various high temperature anti-corrosion industry equipment accessories to improve its performance and service life.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to a method for preparing a zirconium compound-doped high-temperature corrosion-resistant nickel-based alloy. Background technique [0002] As the chemical industry has more and more stringent requirements for corrosion resistance, especially the performance of equipment materials that can withstand strong alkali corrosion in high temperature environments, the preparation technology of corrosion-resistant alloys has always been a hot spot in the field of alloy research. Although the existing corrosion-resistant alloys can maintain a certain corrosion resistance in a low-temperature environment, when the temperature rises above 500 ° C, especially in a strong alkaline environment, grain boundary corrosion will occur, resulting in alloy physics. The performance and corrosion resistance are rapidly reduced, and when it is used in a high-temperature alkaline environment again, it will ac...

AI Technical Summary

Problems solved by technology

Although the existing corrosion-resistant alloys can maintain a certain corrosion resistance in a low-temperature environment, when the temperature rises above 500 ° C, especially in a strong alkaline environment, grain boundary corrosion will occur, resulting in alloy physics. The performance and corrosion resistance decrease rapidly, and when it is used again in a high-temperature alkaline environment, it will accelerate the corrosion of the alloy body and can no longer be used

The commonly used nickel-based alloy preparation method also has literature mentioning the zirconium doping process, such as the patent No. CN102628127A, the Chinese invention patent named "high-strength corrosion-resistant nickel alloy and its manufacturing method", but it uses metal zirconium as raw material, and the raw material cost High, elemental zirconium and nickel matrix are also difficult to fuse, resulting in cracks or even fractures in alloy products. At the same time, zirconium in the alloy is dispersed in the nickel-based alloy in the form of metal zirconium, which affects the properties of the added nickel-based alloy materials such as hardenability, The impact of fracture toughness and other factors is great, and the corrosion resistance in high temperature and strong alkali environment is not ideal.