4 ~ 100 mm 17Mn plate damping steel plate (/% ： 0. 02C

0. 08Si

17.53Mn

0.014P

0. 002S

0.005Als) was developed and produced by Ansteel

with properties of yield strength 311 -407 MPa

15 〜100 mm plate -20 °C V-notch impact energy 113 ~ 144 J

the tensile strength of welded joint 651 ~654 MPa

and-20°C V-notch impact energy 66 〜84 J after welding. The microstructure of the 17Mn damping steel is residual austenite and e martensite

and its damping property is tested using a dynamic mechanical thermal analyzer. Under the condition of double cantilever strain scanning at 30°C and 50 Hz

the damping values of the different thickness damping steels are greater than 0.02. At 100 Hz

the damping values of damping steels of different thicknesses are all greater than 0.05

and the damping values are higher than those of traditional low-alloy structural steels Q235 and Q345 (0.008 and 0.010 ~0.013).