| 稀土La对粉末冶金钛合金组织和力学性能的影响 |
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| 引用本文： | 王斌,刘咏,刘延斌,汤慧萍,邱敬文,王玉林.稀土La对粉末冶金钛合金组织和力学性能的影响[J].粉末冶金材料科学与工程,2011,16(1):136-142. |
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| 作者姓名： | 王斌 刘咏 刘延斌 汤慧萍 邱敬文 王玉林 |
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| 作者单位： | 王斌,刘咏,刘延斌,邱敬文,王玉林,WANG Bin,LIU Yong,LIU Yan-bin,QIU Jing-wen,WANG Yu-lin(中南大学,粉末冶金国家重点实验室,长沙,410083);汤慧萍,TANG Hui-ping(西北有色金属研究院,西安,710016) |
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| 基金项目： | 国家科技支撑计划资助项目，中南大学拔尖博士论文资助项目，粉末冶金国家重点实验室创新基金 |
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| 摘 要： | 在Ti-Fe-Mo合金中以LaH2和LaB6两种形式引入稀土La,制备含La的粉末冶金钛合金,研究La的添加量对钛合金烧结行为以及组织与力学性能的影响,探讨合金中La的存在形式及其在烧结过程中的作用机理。结果表明,钛合金相对密度随LaH2添加量(质量分数)的增加而升高,当LaH2的添加量达到0.6%后,钛合金的相对密度不再发生明显变化;但随着LaB6添加量的增加先升高后降低,在LaB6添加量为0.15%时出现峰值。添加LaH2的钛合金中,稀土元素主要以La2O3颗粒的形式存在,随La含量增加,颗粒发生长大;而在添加LaB6的合金中,烧结反应产物主要是纤维状的TiB、具有规则外形的La2O3颗粒以及含Ti和O的富La絮状颗粒。随LaH2和LaB6的添加量增加,合金的室温抗拉强度和伸长率均先升高后降低。LaH2的添加量达到0.6%时出现强度峰值,添加量达到0.3%时出现伸长率的峰值;而LaB6的添加量达到0.15%时抗拉强度和伸长率均出现峰值。
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| 关 键 词： | 粉末钛合金 烧结 稀土 微观组织 力学性能 |
Effects of LaH_2 and LaB_6 addition on microstructure and mechanical property of powder metallurgy Ti alloy |
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| WANG Bin,LIU Yong,LIU Yan-bin,TANG Hui-ping,QIU Jing-wen,WANG Yu-lin.Effects of LaH_2 and LaB_6 addition on microstructure and mechanical property of powder metallurgy Ti alloy[J].materials science and engineering of powder metallurgy,2011,16(1):136-142. |
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| Authors: | WANG Bin LIU Yong LIU Yan-bin TANG Hui-ping QIU Jing-wen WANG Yu-lin |
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| Affiliation: | WANG Bin1,LIU Yong1,LIU Yan-bin1,TANG Hui-ping2,QIU Jing-wen1,WANG Yu-lin1(1.State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China,2.Northwesten Research Institute for Nonferrous Metals,Xi'an 710016,China) |
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| Abstract: | Ti-Fe-Mo alloys with rare earth La(LaH2 and LaB6) addition were fabricated by powder metallurgy.The effect of La content on sintering behaviors,microstructures and mechanical properties of the titanium alloy was investigated.The exist form of the rare earth La and its effects on the sintering densification process of the Ti alloys were also discussed.The results show that the density of the as-sintered Ti alloy firstly increases with the content of LaH2 increasing from 0 to 0.6%(mass fraction),and then rema... |
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| Keywords: | powder metallurgy Ti alloy rare earth element microstructure mechanical property |
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