Characteristics and Application Scope of H62 Brass
H62 brass refers to ordinary brass with an average copper content of 62%, and copper alloys with other elements added on the basis of ordinary brass are called special brass, and are still represented by “H”.
The numbers indicate the chemical symbols and average composition of other added elements, such as H62, the copper content is 60.5%~63.5%, and the balance is the zinc content;
HA59-3-2 indicates that its copper content is 57%~60%, aluminum content is 2.5%~3.5%, nickel content is 2%~3%, and the rest is zinc content.
Brass is divided into three types: ordinary brass, special brass and cast brass. Cast brass begins with ZCu followed by the symbols of other elements and their average content.
Characteristics: Ordinary brass has good mechanical properties, good plasticity in hot and cold states, good machinability, easy brazing and welding, corrosion resistance, but prone to corrosion cracking.
In addition, the price is inexpensive, and it is a common brass variety that is widely used. H62(four six brass). β is much harder than A at room temperature and can be used for parts that can withstand large loads.
A +β two-phase brass can be hot processed above 600℃. Microstructure of A + two-phase brass: A is a bright white solid solution, and β is a cuZn-based ordered solid solution.
Application: It can be used for all kinds of deep drawing and bending force parts, such as pins, rivets, washers, nuts, conduits, barometer springs, screens, radiator parts, etc.
Application Field and Classification of Dampers
A damper is a device that provides resistance to movement and consumes movement energy. Various dampers (or shock absorbers) have been used in aerospace, aviation, automobiles and other industries to reduce vibration and energy.
From the 1970s, people began to gradually transfer these technologies to the construction, bridge, railway and other structural engineering, its development is very rapid.
In particular, the hydraulic viscous damper with a history of more than 50 years has undergone a large number of experiments, rigorous review and repeated demonstrations before being accepted by the structural engineering community in the United States.
The damper is a device that can quickly stop the movable part of the instrument in the deflected position. In seismic instruments, the damper is used to absorb the natural vibration energy of the vibration system, and its damping force is generally proportional to the speed of the vibration system. Common dampers are three types: liquid dampers, gas dampers and electromagnetic dampers.
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