| 摘要 |
<p>Disclosed is an extremely useful lead-free free-machining bronze casting alloy. Said alloy, a copper-zinc-silicon bronze alloy that does not contain lead, is resistant to erosion and corrosion. The cast structure of said alloy has good mechanical properties (toughness), and said alloy can be cast into water-contacting components of water pipes, for example, via continuous casting, permanent mold casting, or sand casting. The disclosed lead-free free-machining bronze casting alloy contains, by weight, between 19.0% and 22.0% zinc, between 1.0% and 2.0% silicon, between 0.5% and 1.5% bismuth, between 1.0% and 2.0% tin, and no more than 0.20% lead, with the remainder comprising copper and unavoidable impurities.</p> |
