High Force Brass-Material Analysis
High-strength brass, the chemical formula is ZCuZn25Al6Fe3Mn3, the mechanical properties are different zinc content, the mechanical properties are also different, the pressure processing performance has good plasticity, can withstand cold and hot processing.
Various alloys composed of more than two elements are called special brass. Such as copper alloys composed of aluminum, lead, tin, manganese, nickel, iron, and silicon, high-strength brass is one of them. High-strength brass has strong wear resistance, high-strength brass has high strength, high hardness, and strong chemical resistance. Also, the cutting machine performance is also excellent. High-strength brass is often made into sheets, bars, rods, pipes, casting parts, etc.
The chemical formula of high-strength brass is ZCuZn25Al6Fe3Mn3 with a copper content of approximately 65% and a zinc content of approximately 24%. Aluminum can improve the strength, hardness and corrosion resistance of brass. There are three types of brass at room temperature: brass with a zinc content of less than 35%. The microstructure at room temperature consists of a single-phase α solid solution, called α brass.
3.Pressure processing performance
High-strength brass has good plasticity and can withstand cold and hot processing, but it is prone to medium temperature brittleness during hot processing such as forging. Its specific temperature range varies with the amount of Zn content, generally between 200 and 700 ℃. Therefore, the temperature during hot working should be higher than 700℃.
High-strength brass has different zinc content and different mechanical properties. For α brass, with the increase of zinc content, σb and δ increase continuously. Therefore, copper-zinc alloys containing more than 45% zinc have no practical value. The standard high-strength brass Brinell hardness HB is greater than 200, the compressive strength is greater than 600MPa, and the elongation is greater than 10%.
High-strength brass is very widely used. It is made into bearing bushes and bushings by casting. At present, the solid lubricating oil-free bearing (solid-bearing bearing for short) mainly made of high-strength brass as the base is made of high-strength high-strength brass. The matrix, and radially embedded and ordered cylindrical polymer fillers are friction materials (usually graphite, molybdenum disulfide, polytetrafluoroethylene, engine oil and other lubricants). Its superiority lies mainly in its use of copper alloys and non-ferrous metals. Metal friction-reducing materials have their own complementary advantages, which not only have a high load-bearing capacity, but also break through the limit of ordinary bearings relying on oil film grease lubrication, achieving oil-free lubrication, embedded solid lubrication is easy to form a lubrication film, and its friction and wear performance To a great improvement, it is stable, reliable and cost-effective. Compared with the composite oil-free bearing, it has the advantages of good machinability, high precision, strong bearing capacity and good wear resistance. This self-lubricating guide bush guide plate can be used in many fields such as: joint parts of construction machinery, such as excavators, mine scrapers, rotary drilling rigs, concrete pump trucks, rock drilling machinery, hoists, port cranes, etc., as well as metallurgy Mechanical continuous casting machinery, water conservancy machinery, conveying machinery, rolling mills, bottle blowing machines, film blowing machines, cross-clamping differentials for injection molding machines, tire vulcanizers, trailer balance beams, vacuum switches, etc.