Copper-nickel based multielement high corrosion resisting alloy

Abstract

A copper-nickel based multielement high corrosion resisting alloy belongs to the technical field of the metal materials. The general expression of the high corrosion resisting alloy component is CuMNi; wherein, the M element is selected from one or more of transition metal elements Fe, Mn, Cr, V, Nb, Mo and Zn; x and z are respectively atomic percents of Cu and Ni elements; y is the total atomic percent of one or more elements of the transition metal elements; x+y+z=100%; x is 7 to 95%; z/y=12; the optimum content of the M in the modified Cu-Ni alloy added with M and the element category of the M are determined according to the cluster model quantitative, thus overcoming the casualness of the traditional alloy component, solving the Cu-Ni alloy corrosion resistance composition optimization and obviously improving the corrosion resistance performance of the existing Cu-Ni alloy. The alloy component design method is characterized by clear theoretical background, being easy to use, accuracy and reliability, and university. The method has the advantages of simple technique and easy implementation; a smelting and homogenizing annealing technology for heating processing is adopted for obtaining the single-phase solid solution structure of the copper-nickel based multielement alloy, thus guaranteeing the alloy to have excellent processability and decay resistance performance.

Description

technical field [0001] The invention relates to a copper-nickel-based multi-component high-corrosion-resistant alloy, which belongs to the technical field of metal materials. Background technique [0002] Cu-Ni alloys are widely used as condenser materials in piping systems of thermal power plants, ships, mechanized chemicals, and seawater desalination treatment equipment due to their excellent processability and corrosion resistance. According to the national standard "GB / T 5231-2001 Chemical Composition and Product Shape of Processed Copper and Copper Alloys", the main grades of existing iron-nickel alloys are: BFe30-1-1, BFe10-1-1, etc. In BFe30-1-1, it contains 29.0-32.0% nickel, 0.5-1% iron, 0.5-1.2% manganese (wt.%), and the balance of copper. The alloy is based on Cu-Ni binary alloy with Fe added It is a multi-element alloy formed by modification with Mn. Although this alloy has been in practical application for decades, severe corrosion and leakage accidents have oc...

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Problems solved by technology

At present, most practical corrosion-resistant structural alloys are multi-element alloyed on a simple basic system. The selection of alloy components and the substitution of components between components are all empirical. In order to avoid time-consuming and laborious empirical exploration , the problem of composition design of multi-component corrosion-resistant alloy materials needs to be solved

[0004] Although the composition of copper-nickel alloy materials has such an important influence on its corrosion resistance, the current research on the corrosion resistance of copper-nickel alloys mainly focuses on the substitution of added elements and the modification of processing technology, and the specific effects of added elements have not been fully grasped. Mechanism, have not yet found the same technical literature report as the subject of the present invention

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