Novel nickel-copper alloy material and preparation method thereof

Abstract

The invention discloses a novel nickel-copper alloy material and a preparation method thereof; the novel nickel-copper alloy material is prepared from, by weight, 15-20 parts of nickel bronze powder, 15-20 parts of copper, 5-6 parts of manganese, 1-2 parts of bismuth, 1-2 parts of rhenium, 1-2 parts of silver, 5-10 parts of samarium sesquioxide, 5-8 parts of iron, 1-8 parts of calcium dichloride, 2-6 parts of aluminum oxide, 5-6 parts of alcohol, and 1 part of adhesive. The novel nickel-copper alloy material is a replacement for conventional lead-bearing wear-resistant copper alloy and is an environment-friendly wear-resistant nickel-copper alloy material.

Description

technical field [0001] The invention relates to the field of self-lubricating metal alloys, in particular to a novel nickel-copper alloy and a preparation method thereof. Background technique [0002] Lubrication during the working process of wiping parts is the key to improving the life of parts and ensuring the normal operation of mechanical equipment. Lubrication is the most effective measure to reduce friction and wear. The general method is to use lubricating oil or grease. Under certain conditions, parts are generally not easy to use lubricating oil or grease for lubrication. With the sharp increase in the operating speed and load of modern machines and mechanisms, as well as the requirements for safety, hygiene and oil pollution prevention in sewing, food, pharmaceutical and other industries, new materials with high wear resistance and self-lubricating properties and their Preparation technology to adapt to the development of oil-free lubrication technology in relat...

AI Technical Summary

Problems solved by technology

(1) It is easy to produce micro-shrinkage cavity and shrinkage porosity: the crystallization temperature range of nickel bronze is very wide (the maximum temperature interval of liquid-solidus line is 160-170°C), and in such a wide solidification zone, dendrites are staggered, When the cooling rate is small, α dendrites occur in the entire volume almost at the same time, and the feeding channel disappears rapidly. Therefore, it is difficult to feed a large number of microscopic voids between α dendrites in the late solidification stage, and microscopic shrinkage and porosity are easy to occur. Shrinkage cavity

(2) High thermal cracking tendency: Since the nickel bronze is solidified in a paste state, the crust on the surface of the casting is late, and the surface solidified layer advances slowly to the center. When the solid shrinkage of the casting begins, the solidified layer on the surface of the casting is thinner, and the dendrite structure There is still a small amount of liquid between them, so it is easy to generate intergranular cracks