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TiC的添加對(duì)Mo-Ti合金性能與組織結(jié)構(gòu)的影響
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中南大學(xué)博士點(diǎn)基金(20090162110032)；國家杰出青年科學(xué)基金(50925416)


Influence of TiC Addition on Properties and Microstructure of Mo-Ti Alloy
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    摘要:

    采用粉末冶金法，通過在金屬M(fèi)o中添加TiH2粉末及超細(xì)TiC粉末制備Mo-Ti-TiC合金，研究TiC的添加對(duì)Mo-Ti合金的拉伸性能和顯微組織的影響。結(jié)果表明，TiC的添加使Mo-Ti合金的拉伸強(qiáng)度得到有效提高。TiC添加量在0.05%(質(zhì)量分?jǐn)?shù))時(shí)，合金拉伸強(qiáng)度最高，強(qiáng)度較Mo-Ti合金提高了31.7%。TiC的添加保護(hù)了基體中由TiH2顆粒分解脫氫所形成的單質(zhì)Ti顆粒，降低其氧化程度。添加TiC后，合金內(nèi)部生成含元素Mo、Ti、O和C的第二相粒子，有效阻止合金晶粒長(zhǎng)大，因此，隨著合金中TiC含量的增加，合金的晶粒尺寸減小

    Abstract:

    Mo-Ti-TiC alloys were fabricated by powder metallurgy process through adding TiH2 powder and ultrafine TiC powder into Mo metal. The influence of the addition of nano-scale TiC particles on the microstructure and tensile properties of Mo-Ti alloy was studied. The results indicate that the tensile strength of Mo-Ti alloy was effectively increased by TiC particles addition. Mo-Ti with 0.05wt% TiC exhibited the highest tensile strength, which is 31.7% higher than that of Mo-Ti alloy. The addition of TiC protects Ti from oxidation, which is produced by decomposition and dehydrogenization of TiH2 particles. The second phase particles containing Mo, Ti, O and C in the alloy were formed with TiC addition. The grain size of the alloy decreased with the increase of the TiC content since the second phase particles can inhibit the grain growth

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盧明園,范景蓮,成會(huì)朝,廖躍輝,田家敏. TiC的添加對(duì)Mo-Ti合金性能與組織結(jié)構(gòu)的影響[J].稀有金屬材料與工程,2010,39(6):985-988~.[Lu Mingyuan, Fan Jinglian, Cheng Huichao, Liao Yuehui, Tian Jiamin. Influence of TiC Addition on Properties and Microstructure of Mo-Ti Alloy[J]. Rare Metal Materials and Engineering,2010,39(6):985-988~.]
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  • 收稿日期:2009-06-07
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