Brass has good processing performance and is often used for cutting into various accessories. Among them, the most used brass material in cutting is Pb-containing brass. Lead-containing brass has excellent chemical, physical, mechanical and free cutting properties, and is the most widely used copper alloy material. Mainly used in electronics, electrical appliances, locks, joints, plug-in plumbing valve bodies, water meters, flanges, children’s toys and other fields.
The free-cutting mechanism of lead brass: During the machining process, when lead brass material is cut, the dispersed lead particles are easy to break and the chips are broken, so as to reduce chips, reduce sticking and welding, and increase cutting speed. effect. Due to the low melting point of lead particles in the material, during cutting, the contact between the blade and the chip is heated and melted instantly, which helps to change the shape of the cutting and play a lubricating role.
According to the mechanism of the free-cutting performance of lead brass, the elements that are conducive to improving the cutting performance of copper alloys are mainly divided into three types according to their existing forms in copper alloys: a small amount is dissolved in copper alloys and forms eutectic with copper. Elements; insoluble in copper alloys, but forming compounds with copper; partially soluble in copper alloys, and also forming compounds with copper. Adding different elements will improve the processability, physical and chemical properties of copper alloys to varying degrees.
Post time: Jun-09-2022