Damping alloy sheet and process for producing the same
A technology for shock-absorbing alloys and thin plates, which is applied in the manufacture of tools, sounding equipment, furnace types, etc., can solve the problems of high loss coefficient, inability to obtain strong magnetic shock-absorbing alloys, etc., and achieve the effect of high machinability
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Embodiment 1
[0050] The steel slab with the composition within the scope of the present invention shown in Table 1 was reheated to 1100°C, hot-rolled and pickled at a final temperature of 810°C, and then cold-rolled to form a cold-rolled steel sheet with a thickness of 0.8 mm. Continuous annealing was performed at 880° C. for 2 minutes, and the tension was changed to cool to room temperature. Among them, the balance other than the chemical components shown in Table 1 is Fe and unavoidable impurities, especially Nb, Ti, and Zr are each less than 0.001%. In addition, the recrystallization temperature was obtained by annealing in advance by changing the temperature every 20°C and observing the structure after annealing, and it was confirmed that 880°C was the recrystallization temperature or higher. Moreover, Ac was calculated by thermodynamic calculation 1 As for the phase transition point, it is confirmed that 880°C is less than the phase transition point. A sample with a length of 250 mm...
Embodiment 2
[0061] In Example 1, a tension of 0.2 MPa was applied and the steel sheet was cooled to room temperature, followed by temper-rolled steel sheet (0% elongation) and a steel sheet subjected to temper rolling while changing the elongation, and the loss coefficient, Magnetic properties, average grain size, mechanical properties.
[0062] The results are shown in Table 3. When the elongation is more than 2%, the maximum relative magnetic permeability is lowered due to the introduction of plastic strain in the crystal grains, and a loss coefficient of more than 0.030 cannot be obtained. Among them, the average crystal grain size does not change due to elongation, and all of them are between 66 and 69 μm.
[0063] table 3
[0064]
Embodiment 3
[0066] The steel slabs having the compositions shown in Table 4 were reheated to 1090° C., hot-rolled at a final temperature of 900° C., pickled, and then cold-rolled to form cold-rolled steel sheets with a thickness of 1.2 mm. The cold-rolled steel sheets A to I were subjected to continuous annealing at 800° C. for 1 min, and were cooled to room temperature after applying a tension of 0.2 MPa. Among them, the balance other than the chemical components shown in Table 4 is Fe and unavoidable impurities, especially Ti and Zr are each less than 0.001%. And, in the same manner as in Example 1, the recrystallization temperature, Ac 1 Phase transition point, confirm that 800°C is above the recrystallization temperature and less than Ac 1 phase transition point. For the cooled steel sheet, the loss factor, magnetic properties, average crystal grain size, and mechanical properties were investigated in the same manner as in Example 1.
[0067] The results are shown in Table 4. It c...
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