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Compressibility and Forming Ability of Water-Atomized Ni-16Cr-XAl-3Fe (X=4.5, 9.0, 13.5, 18, wt%) Alloy Powders
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Compressibility and Forming Ability of Water-Atomized Ni-16Cr-XAl-3Fe (X=4.5, 9.0, 13.5, 18, wt%) Alloy Powders
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National Key Basic Research Development Plan of China (2012CB723907)

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    摘要:

    研究了高壓水霧化Ni-16Cr-XAl-3Fe (X=4.5，9.0，13.5，18，質(zhì)量分?jǐn)?shù)，%)合金粉末的壓縮與成形性能。結(jié)果表明，Ni-16Cr-XAl-3Fe合金粉末的顯微硬度隨Al含量的增加而增大。水霧化Ni-16Cr-XAl-3Fe合金粉末的壓制行為可以通過黃培云雙對數(shù)壓制方程進(jìn)行描述。通過理論計算發(fā)現(xiàn)，高Al含量的合金粉末壓制過程中出現(xiàn)嚴(yán)重的加工硬化，從而使高Al含量的Ni-16Cr-XAl-3Fe合金粉末難以壓制成形，壓坯出現(xiàn)分層和開裂。出現(xiàn)上述現(xiàn)象的原因主要是由于高Al含量的Ni-16Cr-XAl-3Fe合金粉末中含有一定數(shù)量的Ni3Al或NiAl金屬間化合物析出相。

    Abstract:

    The compressibility and forming ability of water-atomized Ni-16Cr-XAl-3Fe (X= 4.5, 9.0, 13.5, 18, wt%) alloy powders were investigated. Results show that the microhardness of the powders increases with the increasing of Al contents, and the compacting behavior of the four kinds of powders is well consisted with Huang Peiyun compacting theory. According to the compacting equations, it is found that serious work-hardening occurs for powders with relatively high Al contents during pressing, and thus the compressibility and forming ability of water-atomized Ni-16Cr-XAl-3Fe powders become poor with the increasing of Al content. Microcracks and delaminations will appear at the corners of compacts. The reason is mainly attributed to the precipitates of intermetallic compounds such as Ni3Al and NiAl.

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李亞寧,王 建,楊保軍,湯慧萍,王建永,康新婷,談 萍. Compressibility and Forming Ability of Water-Atomized Ni-16Cr-XAl-3Fe (X=4.5, 9.0, 13.5, 18, wt%) Alloy Powders[J].稀有金屬材料與工程,2012,41(11):1907~1910.[Li Yaning, Wang Jian, Yang Baojun, Tang Huiping, Wang Jianyong, Kang Xinting, Tan Ping. Compressibility and Forming Ability of Water-Atomized Ni-16Cr-XAl-3Fe (X=4.5, 9.0, 13.5, 18, wt%) Alloy Powders[J]. Rare Metal Materials and Engineering,2012,41(11):1907~1910.]
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  • 收稿日期:2012-04-05
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