Zinc alloys, also known as zinc-based alloys, are generally classified into binary alloys, ternary alloys, and multicomponent alloys. Binary zinc-based alloys generally refer to zinc-aluminum alloys; ternary zinc-based alloys generally refer to zinc-aluminum-copper alloys; multi-component alloys generally refer to zinc-aluminum-copper and other trace metals.
Zinc-based alloys, zinc alloys, zinc-aluminum alloys are a broad concept and do not refer to the concept that the alloy can satisfy a particular function. For example, zinc-aluminum alloy is classified into low-aluminum-zinc-based alloy, medium-aluminum-zinc-based alloy and high-aluminum-zinc-based alloy according to the content of aluminum Although they are all zinc-aluminum alloys, their performance is very different.
Low-aluminum-zinc-based alloys are generally binary alloys, mainly used for anti-corrosion functions, and basically replace the galvanizing process (new technology) with galvanized aluminum alloy. Medium-aluminum zinc-based alloys are generally ternary alloys, mainly used for fastening functions, and are often used to make fasteners such as rivets. The reason is that in addition to their strength and elongation, the most important thing is that they have good construction. Convenience. High-aluminum-zinc-based alloys are generally ternary or multi-element alloys. The alloy has such characteristics that different smelting parameters and casting processes are used, and the materials produced have great differences in properties; some have good elongation. For the manufacture of fasteners, some of the high strength is suitable for the manufacture of high-strength housings, and only a small part of the friction reduction coefficient is suitable for the manufacture of sliding bearings; therefore, high-aluminum-zinc-based alloys are called “magic alloys” abroad. In general, zinc-based bearing alloys are all high-aluminum-zinc-based alloys, but high-aluminum-zinc-based alloys are not all plain bearing alloys.
The “zinc-based alloy” in the classification of new plain bearing alloys is essentially different from the above-mentioned broad concept zinc-based alloys, and strictly speaking, it is not a class of materials.
Sliding bearing alloys require a certain degree of strength, elongation and hardness, and the most important thing is to have very good antifriction properties.
Good anti-friction properties are definitely not produced by mixing several related metal components together. It requires a complete process to ensure its performance; for example, diamond and graphite, they have the same chemical composition, if Diamond or graphite can be produced by different processes; the molecular structure of diamond is a triangular structure, its characteristics are hard and can be used to make tools; the molecular structure of graphite is a parallel structure, and its characteristics are very soft. Can be used to make lubricants; diamond and graphite have the same composition, but their performance is vastly different.
The process of multi-alloy is much more complicated than the ternary alloy; the ternary alloy can be produced by one smelting and also by a secondary smelting process. Since the cost of secondary smelting is higher than that of a single smelting, many companies are willing to use a smelting process to produce ternary alloys. Multi-alloy is added to one or more alloy components on the basis of ternary alloy. The smelting technology is naturally more complicated. The general smelting technology level wants to add one or more elements at will, but it is very difficult to join.
With the birth of nanotechnology in the world, the micro-nano application technology derived from nanotechnology has brought new development ideas to the basic materials industry and completely changed people’s thinking.
The micro-nano application technology has been applied in the field of bearing alloys, and the advanced “combination casting process” technology has been born, thus realizing the manufacture of zinc-based microcrystalline alloys synchronized with the world on the basis of multiple bearing alloys.
The microcrystalline alloy is a zinc-based alloy material whose alloy grain is refined to the order of micron. The zinc-based alloy with such ultrafine grain can achieve excellent comprehensive mechanical properties and superior size in a special aspect. Stability and wear resistance.