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[交流]
【求助】緊急求助,鋁合金材料問題求助
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在做產品時,遇到了材料問題,因產品價值較貴,不能做報廢處理,所以尋求各位大俠的幫助。 問題是這樣的,我們的產品經(jīng)研磨噴砂后,進行氧化前清洗時檢查外觀,發(fā)現(xiàn)在產品表面有一條長15cm,寬3cm的暗色帶,可以看出有明顯的色差,之后認為可能是研磨的問題,就重新研磨噴砂,但還是有此種問題的出現(xiàn),我們分析應該為材料問題,我們使用的是6061鋁材,認為可能是材料表面的硅含量不均勻造成的,但不知怎么解決,還請各位大俠能不吝賜教,小弟拜謝了 [ Last edited by 鋼鐵盒子 on 2011-4-2 at 22:05 ] |
» 搶金幣啦!回帖就可以得到:
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I guess there are two possibilities: (i) silicon mark and (ii) black line. The first one is due to heterogeneous spatial distribution of Si and/or Mg containing particles, i.e., the dark band contains much more Si, Mg particles than elsewhere. This is a defect of casting and homogenization. You really cannot do anything, but you can complain your supplier. The second one is due to local high pressure and/or high temperature during extrusion. Again, you cannot do anything, but you can modify your extrusion condition to avoid the same problem next time. |
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