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快淬Al-5Ti-1B和Al-10Sr中间合金对ZL109合金的细化变质作用

发表时间:2011-05-15  浏览量:1199  下载量:544
全部作者: 崔春翔,王学芹,刘双进,张彦杰,谷存帅,孙继兵
作者单位: 河北工业大学材料科学与工程学院
摘 要: 探讨了Al-5Ti-1B和Al-10Sr中间合金对ZL109合金的细化变质作用。通过对Al-5Ti-1B和Al-10Sr中间合金进行快速凝固处理,在冷却速度为105~106℃/s时,得到了薄丝带状细化剂。试验中,中间合金Al-5Ti-1B和Al-10Sr分别以薄带状和普通块状加入到ZL109合金中,对2种状态的中间合金变质效果进行了对比。试验结果表明:快淬Al-5Ti-1B和Al-10Sr的加入对ZL109合金的细化变质效果明显,显著提高了合金的硬度、耐磨性和拉伸性能;并且Al-10Sr作为变质剂加入到ZL109合金中能导致共晶硅的形态从粗大的片状(或称为针状)转变为细小的纤维状。
关 键 词: 金属基复合材料;快速凝固;铝合金;孕育剂;力学性能
Title: Modifying effect of rapidly solidified Al-5Ti-1B and Al-10Sr master alloy on ZL109 alloy
Author: CUI Chunxiang, WANG Xueqin, LIU Shuangjin, ZHANG Yanjie, GU Cunshuai, SUN Jibing
Organization: School of Materials Science and Engineering, Hebei University of Technology
Abstract: This paper deals with the modifying effect of rapidly solidified Al-5Ti-1B and Al-10Sr master alloy on ZL109 alloy. Al-5Ti-1B and Al-10Sr master alloys were fabricated out in rapid solidification process. While the cooling rate was about 105-106℃/s, the thin silk ribbon thinning inoculant was obtained. The Al-5Ti-1B and Al-10Sr master alloy, as the shape of thin ribbon and the general block-like were added into the ZL109 alloy, respectively, and the effects of alloy modification were compared with each other. The experimental results showed that the addition of nanometer Al-5Ti-1B and Al-10Sr could refine the microstructure of ZL109 alloy significantly, thus the hardness, wear resistance and tensile strength increasing obviously. The addition of Al-10Sr into ZL109 alloys as a modifier could result in the morphology transition of eutectic silicon from coarse plate-like or acicular to fine fibrous.
Key words: metal matrix composites; rapid solidification; aluminium alloy; inoculant; mechanical properties
发表期数: 2011年5月第9期
引用格式: 崔春翔,王学芹,刘双进,等. 快淬Al-5Ti-1B和Al-10Sr中间合金对ZL109合金的细化变质作用[J]. 中国科技论文在线精品论文,2011,4(9):786-790.
 
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