| 过共晶铝硅合金新型变质剂的研究 |
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| 引用本文： | 杨永建,张绪平,朱洪睿,牛志鹏. 过共晶铝硅合金新型变质剂的研究[J]. 轻金属, 2011, 0(8) |
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| 作者姓名： | 杨永建 张绪平 朱洪睿 牛志鹏 |
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| 作者单位： | 中国矿业大学材料学院,江苏徐州,221116 |
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| 摘 要： | 通过拉伸实验和盒相观察,研究了过共晶铝硅合金新型变质剂不同变质时间及添加顺序对变质效果的影响.时效性实验表明:自制新型变质剂对过共晶铝硅合金具有良好的变质效果；在15min～120min内,共晶硅得到了更好的变质效果,呈细小的短杆状、粒状,端部圆滑,均匀紧密,弥散分布在Al基体上；在15min～120min内,随时间的延长,初生硅的形状先统一、规则,呈板块状,分布均匀,棱角钝化,平均尺寸较小,达到18um,然后初生硅形状不再统一、规则,平均尺寸变大；复合变质剂中的Ti:C、Sr盐、Ca盐变质作用在15min内变质效果不大,在45min后开始失效；而Cu盐和稀土起短效变质作用；复合变质剂较优加入顺序为:在加入复合变质剂中的Ti∶C、Sr盐、Ca盐45min时,再加入Cu盐和稀土具有良好的变质效果.
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| 关 键 词： | 变质剂 抗拉强度 显微组织 时效性 |
Studies on a new modifier of hypereutectic Al-Si alloys |
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| YANG Yong-jian , ZHANG Xu-ping , ZHU Hong-rui , NIU Zhi-peng. Studies on a new modifier of hypereutectic Al-Si alloys[J]. Light Metals, 2011, 0(8) |
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| Authors: | YANG Yong-jian ZHANG Xu-ping ZHU Hong-rui NIU Zhi-peng |
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| Affiliation: | YANG Yong-jian,ZHANG Xu-ping,ZHU Hong-rui and NIU Zhi-peng(China University of Mining and Technology,Xuzhou 221116,China) |
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| Abstract: | The article through the tension experiment and metallographic observation,researches the influence of different modification time and adding order on modification effects of the new modifying agent on hyper-eutectic Al-Si alloys,aging performance.The results show that by using self-made modifying agent has a significant effect modification effects on hypereutectic Al-Si alloys,between 15~120 min,eutectic silicon got better modification effect,it shows tiny short rod,granular,rounded corners,distributes and ... |
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| Keywords: | modifying agent tension strength microstructure aging performance |
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