(中南大學 材料科學與工程學院，長沙 410083)
摘 要: 以水平連鑄卷坯−冷軋−退火新工藝制備Cu-0.1Fe-0.03P合金成品薄帶，采用拉伸力學性能測試、金相、織構分析和電子顯微分析方法研究成品薄帶的顯微組織結構特征。結果表明，與傳統的熱軋−冷軋−退火工藝制備的薄帶性能相比，水平連鑄卷坯−冷軋−退火新工藝沒有經過熱軋，連鑄坯中的縮孔、疏松沒有在冷軋過程中實現完全的冶金復合時，產品表面會出現麻點和起皮現象。極圖和ODF織構分析表明，水平連鑄卷坯−冷軋−退火新工藝制備的Cu-0.1Fe-0.03P合金薄帶以{110}〈112〉黃銅織構為主，此外還有較弱的{110}〈100〉高斯織構、{, 123}〈634〉S織構以及{001}〈100〉立方織構。晶體學織構是薄帶出現力學平面各向異性的主要原因。新工藝制備的合金薄帶的抗拉強度、電導率和軟化溫度稍低而伸長率稍高。
關鍵字: Cu-0.1Fe-0.03P合金；水平連鑄卷坯；薄帶；麻點；各向異性
（School of Materials Science and Engineering, Central South University, Changsha 410083, China）
Abstract:Cu-0.1Fe-0.03P alloy strips were prepared by a new process of horizontal continuous casting-cold rolling-annealing. The microstructures of the strips were studied by tensile test, OM, X-ray diffraction and electron microscopy analysis. The results show that compared with the traditional preparation of hot rolling-cold rolling-annealing process, the process of horizontal continuous casting-cold rolling- annealing has no hot rolling. When the shrinkage and osteoporosis in the continuous casting can not complete the metallurgical complex during the cold-rolling process, the spots and peeling appear on the surface of products. The alloy strips prepared by the new process have slight lower tensile strength, electrical conductivity and soften temperature and higher elongation. Mechanical properties anisotropy exists in the strips prepared by the new process, thus causes the 45˚ direction crack when stamped.
Key words: Cu-0.1Fe-0.03P alloy; horizontal continuous casting volume ingot; strip; spot defect; anisotropy
