P含量对Inconel 706合金凝固过程中(Laves+γ)共晶反应的影响
EFFECTS OF P CONTENT ON(LAVES+γ) EUTECTIC REACTION DURING INCONEL 706 ALLOY SOLIDIFICATION
查看参考文献14篇
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文摘
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研究了P对Inconel 706合金元素偏析和铸态组织的影响.结果表明,P在合金凝固过程中显著地偏聚于剩余液相中,并促进Nb和Ti等元素的偏聚,从而促进富Nb的Laves相和富Ti的η-Ni3Ti相析出;含0.004%P(质量分数)的Inconel 706合金枝晶间析出细小的(Laves+γ)共晶和少量针状η-Ni3Ti相;P含量超过0.016%以后,枝晶间析出块状Laves相, Laves相颗粒之间析出大量密集的η-Ni3Ti板条;此外,P含量由0.004%升高至0.016%, Laves相的初熔温度由1170-1180℃之间下降至1160-1170℃之间.分析认为,高度富集于剩余液相中的P强烈阻碍γ相的析出,因此,P含量增加使合金的终凝温度降低,而且导致合金的凝固结束反应由(Laves+γ)共晶转化为先析出富P的Laves相再析出γ基体的离异共晶反应 |
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其他语种文摘
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The effects of P on elemental segregation and as-cast microstructure in Inconel 706 alloy were investigated in this paper. The results showed that P was markedly enriched in residual liquid and enhanced the segregation of Nb and Ti, which promoted the precipitation of Nb-enriched Laves phase and Ti-enrichedη-Ni3Ti phase. In the as-cast alloy doped with 0.004% P(mass fraction), fine(Laves+γ)eutectic and needle likeηphase were formed in interdendritic region. As the P dopant was higher than 0.016%, blocky Laves phase was formed and lathηparticles were precipitated among Laves particles. Moreover, with P increasing from 0.004%to 0.016%, the incipient melting-point was found to drop from 1170-1180℃to 1160-1170℃.In high P-doped alloys, the enrichment of P in the residual liquid was believed to hinder the solidification of 7 phase, as a result, the final solidification temperature was found to be decreased and the solidification was terminated by the solidification of γ phase prior to the formation of P-bearing Laves phase rather than forming the (Laves+γ)eutectic |
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来源
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金属学报
,2010,46(7):873-878 【核心库】
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DOI
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10.3724/sp.j.1037.2010.00873
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关键词
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Inconel 706合金
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P含量
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凝固组织
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偏析
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地址
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1.
东北大学材料与冶金学院, 沈阳, 110819
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沈阳黎明发动机(集团)责任有限公司, 沈阳, 110043
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中国科学院金属研究所, 沈阳, 110016
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0412-1961 |
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学科
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金属学与金属工艺 |
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文献收藏号
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CSCD:3974251
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