Magnetic head comprising two spot welded metal plates

Details Magnetic head comprising two spot welded metal plates Magnetic head comprising two spot welded metal plates

1982-01-18

1983-12-06

Rutledge, L. Dewayne

Stock material or miscellaneous articles

All metal or with adjacent metals

Plural layers discontinuously bonded

428682, 360126, G11B 516

Patent

active

044194153

ABSTRACT:
A magnetic recording head may be assembled from laminar plates of ferromagnetic material which are welded together by spot welds to form a core stack. The core stack is welded by spot welds (E, F, G) to a base plate (16). The ferromagnetic material is typically an alloy of Si, Al and Fe and tends to produce stress cracks around the areas of the welds. In order to overcome this problem, the edges of the plates, at least around the areas of the welds, and provided with a layer of ductile metal such as Ni, Fe or Mo. The layer is between 5 and 500 .mu.m thick. The depth of the welds is arranged to lie substantially within the ductile metal layer.

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Metals handbook, Lyman et al., vol. 6, "Welding and Brazing", American Society for Metals, 1973, pp. 643-644, 713-715.
"Iron-Base High Magnetic Permeatility Alloys for Magnetic Recording and a Reproducing Head", Research Institute of Electric and Magnetic Alloys, Chemical Abstracts 93: 196736g, 1980.
"Magnetic Core for Magnetic Tape Recorder", Satomi et al., Chemical Abstracts 91:67624d, 1979.
"Magnetic Core Materials for Audio Magnetic Heads", Shinagawa, Chemical Abstracts 94:6402v, 1981.

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