金属延展性是物质的物理属性之一,它指可锤炼可压延程度。易锻物质不需退火可锤炼可压延。可锻物质,则需退火进行锤炼和压延。脆性物质则在锤炼后压延程度L显得较差。物体在外力作用下能延伸成细丝而不断裂的性质叫延性;在外力(锤击或滚轧)作用能碾成薄片而不破裂的性质叫展性。如金属的延展性良好,其中金、铂、铜、银、钨、铝都富于延展性。石英、玻璃等非金属材料在高温时也有一定的延展性。
锻铜那是加热铜片,利用金属延展性,用工具敲击铜片造型;
It was heated wrought copper, a metal ductility, copper percussion modeling tools;
由于拥有金属延展性,缺少工业使用价值,以及相对稀少的特点,几个世纪以来黄金一直在充当准货币。
Gold has been valued as a quasi-currency for centuries for its malleability, lack of industrial USES and relative scarcity.
银是所有金属中延展性最好的。
So you don't have ductility, which is what you have in metal.
所以材料不具备延展性,而且金属中有自由电子。
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