公开(公告)号：US4398972A

公开(公告)日：1983-08-16

申请号：US262602

申请日：1981-05-11

Applicant: Chester M. Bordelon ,  Gilbert Y. Chin ,  Sungho Jin ,  Richard C. Sherwood ,  Jack H. Wernick

Inventor： Chester M. Bordelon ,  Gilbert Y. Chin ,  Sungho Jin ,  Richard C. Sherwood ,  Jack H. Wernick

IPC: H04R9/02 ,  C22C38/00 ,  C22C38/08 ,  H01F1/14 ,  H01F1/147 ,  C04B35/00

CPC classification number: C22C38/08 ,  H01F1/14708

Abstract: Disclosed are magnetically soft ferritic multiphase Fe-Ni alloys having a Ni content in the range of about 4 to about 16 weight percent, devices containing a body fabricated from such alloys, and method for heat treating such body. Appropriate heat treatment comprises a low-temperature anneal in the two-phase (.alpha.+.gamma.) region of the Fe-Ni phase diagram, and typically results in improved magnetic properties. In particular, alloys according to the invention having x weight percent of Ni have a maximum permeability .mu..sub.m at least as large as 1.5[25(16-x).sup.2 ]G/Oe. The alloys typically also have a coercive field H.sub.c at most as large as 0.7[0.65(1+0.6x)]Oe, a saturation induction B.sub.s of at least about 20 kG, a maximum incremental permeability .DELTA..mu., measured with an applied a.c. field of about 0.005 Oe, of at least about 150 G/Oe, and a yield strength to 0.2 percent offset of at least about 40 10.sup.3 psi, with all the material properties measured at room temperature. Alloys according to the invention can advantageously be used in devices comprising a magnetically soft body, for instance in electro-acoustic transducers, e.g., in telephone receivers.

Abstract translation: 公开了具有约4至约16重量％的Ni含量的磁软铁素体多相Fe-Ni合金，包含由这种合金制成的主体的装置以及用于对该体进行热处理的方法。 适当的热处理包括在Fe-Ni相图的两相（α+γ）区域中的低温退火，并且通常导致改善的磁性能。 特别地，根据本发明的具有x重量百分比的Ni的合金具有至少与1.5 [25（16-x）2] G / Oe一样大的最大磁导率μm。 合金通常也具有至多大至0.7 [0.65（1 + 0.6x）] Oe的矫顽磁场Hc，至少约20kG的饱和感应Bs，最大增量磁导率DELTA mu，用施加的a.c.测量。 约0.005Oe，至少约150G / Oe，屈服强度至少为0.2％，偏移至少为约103×10 3psi，所有材料性能均在室温下测定。 根据本发明的合金可有利地用于包括磁性软体的装置中，例如在电声换能器中，例如在电话接收器中。