含铜量大于99.50%的铜，因呈红色，又称赤铜、红铜、紫铜。常含有氧、硫、铅、砷、铋、磷等杂质。具有优良的导电性、导热性、适中的机械性能。可用来配制铜合金和作合金元素。广泛用于电器电工领域作导电、导热材料。用反射炉等火法冶炼铜，用电解法精炼铜。
在工业纯铜中加入微量锂能提高其再结晶温度。
Trace lithium can improve recrystallization temperature of pure copper.
结果表明，T2工业纯铜在BC路径下经历多次挤压后，晶粒得到细化。
The results show that, when the T2 pure copper is extruded in multipass by route BC, the grains can be refined.
冷轧工业纯铜及316 L不锈钢处理样品表面均发生重熔现象，处理面上形成类似火山坑的显微形貌。
The results are listed as following: 1 the top surface layers of CRIC and 316l SS sample were remelted under the irradiation of HCPEB. Crater-like morphology was formed on the treated surfaces.
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