Heat treatment for minimizing crazing of hot-dip aluminum coatin

Details Heat treatment for minimizing crazing of hot-dip aluminum coatin Heat treatment for minimizing crazing of hot-dip aluminum coatin

1973-10-09

1976-05-25

Martin, William D.

Metal treatment

Process of modifying or maintaining internal physical...

Chemical-heat removing or burning of metal

427383, 427431, 427436, 148156, 427380, 427399, 427320, 427329, B44D 1092, C23C 108

Patent

active

039590356

ABSTRACT:
The crazing resistance of hot-dip aluminum coatings is enhanced by heat-treating the coated strip at a temperature of about 500.degree. - 1000.degree.F for a period of at least 10 minutes. At the lower end of the temperature range, a period substantially in excess of 5 hours is required. This heat treatment may be effected by retarding the cooling of the coated strip after its emergence from the molten aluminum bath, or the strip may first be cooled as in conventional practice and then reheated to the requisite temperature range.

REFERENCES:
patent: 1982563 (1934-11-01), Wimmer
patent: 2082622 (1937-06-01), Fink
patent: 2453772 (1948-11-01), Whitfield
patent: 3033705 (1962-05-01), Hanink et al.
patent: 3318126 (1967-05-01), Werthman

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