An alloy is a mixture or metallic solid solution composed of two or more elements. Complete solid solution alloys give single solid phase microstructure, while partial solutions give two or more phases that may or may not be homogeneous in distribution, depending on thermal (heat treatment) history. Alloys usually have different properties from those of the component elements. Alloy constituents are usually measured by mass. Alloys are usually classified as substitutional or interstitial alloys, depending on the atomic arrangement that forms the alloy. They can be further classified as homogeneous, consisting of a single phase, heterogeneous, consisting of two or more phases, or intermetallic, where there is no distinct boundary between phases.
Lead-based alloy is mainly used for free maintenance sealed battery plate bar alloy, zinc electrolysis anode.Lead, Antimony, is tin lead-based bearing alloy, copper alloy, its hardness is moderate, running good, the friction coefficient is slightly larger, but toughness is very low. Back, which applies to the casting by the earthquake is smaller, the load lighter or slowerbearing.
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