Manganese copper high damping alloy

A high damping alloy based on Mn-Cu binary alloy with Al, Ni, Fe and other alloying elements.

The as-cast organization is composed of ductile substable phase γ tough phase, and the interface damping comes from the motion of Luan crystal interface and phase interface and antiferromagnetic magnetic moment (domain) turning motion. When the temperature is higher than the M point, the damping properties are lost. Depending on the composition of the alloy, the M point is between 70 and 100 degrees Celsius. The damping properties are high at low temperatures.

Effect of impurities and improvement methods
Impurities Si, C alloy embrittlement, damping performance decline, by 400-450 ℃ × 4h aging treatment, can increase the martensite within the micro Luan crystal, improve the damping performance.

Composition of rolled manganese copper alloy
Rolled manganese copper alloy composition range: 55-65% Mn, 2.0- 3.0% Zn, 1.5-2.5% Al. there is a sudden increase in critical stress, aging treatment (400-450 ℃) and Zn, Al content can affect the M point, the best M point should ensure that the minimum stress can be obtained under the high damping solidification speed on the damping properties and mechanical properties, have an impact on the different thickness of the casting has an optimal solidification speed.

Mainly used in: submarine propeller, transmission gear, circular saw, etc., can be respectively 5-10db, 10 -20db, 13-30db, good weldability, can be used for splicing components, can be cold, hot processing, wire drawing