Ordinary Brass It is an alloy of copper and zinc. When the zinc content is less than 39%, zinc can dissolve in copper to form single-phase a, called single-phase brass, which has good plasticity and is suitable for hot and cold press processing. When the zinc content is more than 39%, there is a single phase and b solid solution based on copper and zinc, called dual-phase brass, b makes the plasticity small and the tensile strength increases, which is only suitable for hot pressure processing. If the mass fraction of zinc continues to increase, the tensile strength will decrease, and the code will be denoted by “H + number”, H represents brass, and the number represents the mass fraction of copper. For example, H68 indicates that the copper content is 68%, and the zinc content is 32%. For brass, the cast brass should have the word “Z” before the code, such as ZH62, such as Zcuzn38, which indicates that the zinc content is 38%, and the balance is copper. Cast brass. H90 and H80 are single-phase, golden yellow, so they are called gold, which are called coatings, decorations, medals, etc. H68 and H59 belong to duplex brass, which are widely used in structural parts of electrical appliances, such as bolts, nuts, washers, springs, etc. In general, single-phase brass for cold deformation processing and dual-phase brass for hot deformation processing. 2) Special Brass A multi-component alloy composed of other alloying elements added to ordinary brass is called brass. Commonly added elements are lead, tin, aluminum, etc., which can be called lead brass, tin brass, and aluminum brass accordingly. The purpose of adding alloying elements. The main purpose is to improve the tensile strength and improve the manufacturability. Such as: HPb59-1 means that the mass fraction of copper is 59%, the mass fraction of the main element lead is 1%, and the balance is lead brass with zinc.
Post time: Jul-05-2022