Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...
Patent
1987-10-13
1989-06-06
Silverberg, Sam
Stock material or miscellaneous articles
All metal or with adjacent metals
Composite; i.e., plural, adjacent, spatially distinct metal...
427431, 427367, 4273839, B32B 1504, B05D 302
Patent
active
048370916
ABSTRACT:
A cold rolled solid solution iron-aluminum diffusion alloy foil and a method of making the foil are described. The foil has good room temperature formability and high temperature oxidation and corrosion resistance with useful electrical and magnetic properties and is adapted for use as a tool wrap, as an electrical steel, and as a support for a catalyst after a coating of spine-like aluminum oxide whiskers is grown on the surface thereof. The foil is made by hot-dip aluminum coating a titanium stabilized low carbon steel strip, cold rolling the aluminum coated strip to effect between about a 40 and 99 percent reduction in thickness, and diffusion heating the cold rolled aluminum coated steel strip to form a solid solution iron-aluminum diffusion alloy foil containing between about 2 and 12 wt. % aluminum. In a modified form the cold rolled aluminum coated steel is heated in a dry nitrogen containing atmosphere to form an aluminum nitride-containing surface film which has increased resistance to attack by acidic solutions. As a further modification, the foil product is subjected to additional cold rolling to create strain in the foil and the strained foil is heated to cause the crystal size in the foil to be substantially increased.
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R. S. Barnes and D. J. Mazey, "The Effect of Pressure Upon Void Formation in Diffusion Couples," Acta Metallurgica, vol. 6, Jan. 1958, pp. 1-7.
Inland Steel Company
Silverberg Sam
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