| 摘要 |
PURPOSE:To obtain an Fe-Co-Mn-C alloy consisting of perscribed precentages of Co, Mn and C and the balance Fe and capable of being provided with desired magnetic characteristics by a short-time treatment under heating without requiring the strict control of the temp. dropping program and a long-time treatment under heating. CONSTITUTION:This Fe-Co-Mn-C alloy consists of, by weight, 30-55% Co, 15- 27% Mn, 0.3-20% C and the balance Fe. When the alloy is treated under heating at a temp. giving nonmagnetic gamma-phase in a thermal equilibrium state and quenched to room temp., the gamma-phase state is maintained without causing phase transformation. The alloy is not cracked even when cold rolled, cold swaged or cold drawn at a high rate, and it maintains the nonmagnetic state and has high workability. By simply treating the cold worked alloy under heating for a much shorter time (about 1hr) than the time of a treatment under heating for a conventional alloy, desired magnetic characteristics are obtd. |
