快淬Al-5Ti-1B 和Al-10Sr中间合金对ZL109合金的细化变质作用
首发时间:2010-12-15
摘要:本文探讨了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,对两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。
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Modifying Effect of Rapidly solidified Al-5Ti-1B and Al-10Sr Master Alloy on Zl109 Alloy
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 obut 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 eachother.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.
Keywords: Metal matrix composites rapid solidification cast aluminium alloy
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No.4396049152023129****
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