| 摘要 |
<p>The liner (16) and, optionally, the tamper (12) of a shaped charge and the sheathing of mild detonating cord, ignition cord, delay cord, etc., are advantageously made of a tin-based alloy that is preferably substantially lead-free and generally comprises about 86 to 99.5 percent tin, 0.5 to 14 percent antimony and, in some embodiments, 0.25 to 6 percent copper. In some embodiments, the alloy may contain 95 to 99 percent tin; balance antimony. Suitable alloys include commercially pure tin (e.g., about 99.5 percent tin and 0.5 percent antimony) and antimonial tin (e.g., about 95 percent tin and 5 percent antimony) and modern pewter, (e.g., about 90 to 98 percent tin, about 1 to 8 percent antimony and 0.25 to 3 percent copper). Modern pewter is preferred as it is found to provide superior working characteristics. Modern pewter also provides superior performance relative to aluminum liners for shaped charges.</p> |
