| 摘要 |
Aluminum armor plate containing relatively high amounts of magnesium, 6-10%, along with about 0.1-1% manganese and up to 0.23% chromium is made by cold rolling aluminum alloy rolling stock to a cold reduction of at least 10% with or without prior hot rolling. Susceptibility to stress conversion cracking is overcome by heating the alloy to an elevated temperature of typically 600 DEG or 700 DEG F. or more followed by cooling the alloy at a controlled cooling rate of at least 10 DEG F. per minute. The heating and the cooling precede the cold rolling operation and may be associated with hot rolling if such is employed.
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