Nickel-phosphorus intermediate alloy and preparation method and application thereof

Abstract

The invention discloses a nickel-phosphorus intermediate alloy and a preparation method and application thereof. The preparation method comprises the following steps that metal nickel and a nickel-phosphorus alloy are provided; part of the metal nickel and the nickel-phosphorus alloy are subjected to heat treatment for 5-60 min at the temperature of 900 DEG C or above, then the balance of the metal nickel is added, smelting is conducted for 1-20 min at the temperature of 1000-1100 DEG C, and first molten metal liquid is obtained; and liquid white phosphorus is injected into the first molten metal liquid, heat treatment is conducted for 1-10 min at the temperature of 1000 DEG C or above, and the nickel-phosphorus intermediate alloy is obtained. White phosphorus is adopted as a phosphorus source, introduction of impurities in the nickel-phosphorus alloy is reduced, meanwhile, the smelting temperature is lower, and nickel-phosphorus processing with low energy consumption, low pollution and low carbon emission is achieved.

Description

technical field [0001] The invention belongs to the technical field of metal alloys, and in particular relates to a nickel-phosphorus master alloy and its preparation method and application. Background technique [0002] With the popularization and use of stainless steel in auto parts, oil and gas pipelines, radiators and exchangers. The brazing process of stainless steel parts is also facing new technological changes. The brazing temperature required by traditional copper-based brazing materials is high, and at the same time, the welding strength of the brazing part and the corrosion resistance of the parts need to be improved. A new type of nickel-based brazing material, which obtains a brazing material with a lower brazing temperature by adding elements such as chromium, iron, boron, phosphorus, and silicon to nickel. The addition of phosphorus in nickel-based brazing materials is mainly in the form of nickel-phosphorus alloys. [0003] In the prior art, there are many...

AI Technical Summary

Problems solved by technology

The current preparation process of nickel-phosphorus master alloy is mostly based on the phosphorus pressing method, that is, using red phosphorus as a phosphorus source, first place the red phosphorus in a crucible, and place an isolation material layer made of quartz sand on the red phosphorus , and then put in metal raw materials such as nickel plates, heat up to the melting point of the metal raw materials and keep warm until the metal raw materials are completely melted, break the isolation layer so that the red phosphorus enters the molten metal, and remove the isolation layer material in the melt. Obtain nickel-phosphorus alloy; the isolation layer material used in this method introduces impurities, and the melting of metal raw materials requires high temperature and high energy consumption. Therefore, a low-temperature, fast, green, environmentally friendly and efficient nickel-phosphorus intermediate is developed Alloy processing technology is urgently needed