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PREP 工藝制取鎳基高溫合金粉末中的異常顆粒
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鋼鐵研究總院 高溫材料研究所 北京100081,鋼鐵研究總院 高溫材料研究所 北京100081,鋼鐵研究總院 高溫材料研究所 北京100081,鋼鐵研究總院 高溫材料研究所 北京100081

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TG132.32

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Study on abnormal particles in Ni-base Superalloy Powder by PREP Process
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Central Iron Steel Research Institute,High Temperature Material Institute,Beijing China 100081,Central Iron Steel Research Institute,High Temperature Material Institute,Beijing China 100081,Central Iron Steel Research Institute,High Temperature Material Institute,Beijing China 100081,Central Iron Steel Research Institute,High Temperature Material Institute,Beijing China 100081

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    摘要:

    摘 要: 等離子旋轉(zhuǎn)電極制粉工藝（PREP）是目前我國(guó)制取高溫合金粉末的重要手段之一。粉末的質(zhì)量是粉末冶金領(lǐng)域備受關(guān)注的問(wèn)題。本研究對(duì)PREP工藝制取鎳基高溫合金粉末中的一種異常顆粒進(jìn)行了觀察、分類、統(tǒng)計(jì)和分析。研究結(jié)果表明，合金粉末中存在粉末與升華物、熔渣、陶瓷、有機(jī)物粘連為一體的異常顆粒。這類異常顆粒的產(chǎn)生與母合金的純凈度、夾雜的性質(zhì)、霧化制粉工藝參數(shù)有密切的關(guān)系。篩分和靜電處理異常顆粒的能力與所粘連夾雜物的尺寸、形態(tài)以及化學(xué)組成和密度、介電常數(shù)等物理性質(zhì)有關(guān)。與篩分處理相比，靜電后1kg粉末樣品中粘連夾雜的顆粒減少了63%；在50-150μm的成品粉中，粘連熔渣的顆粒占?xì)埓鎶A雜物總量的36%，粘連陶瓷顆粒為4%，粘有機(jī)物顆粒占11%。

    Abstract:

    Abstract: Plasma Rotating Electrode Process (PREP) is one of the most important methods of manufacturing superalloy powder in China. The quality of powder is highly concerned in the field of Powder Metallurgy(PM). One kind of abnormal particles in nickel-based superalloy powder by PREP was observed, classified, and analyzed statistically in this paper. Research has shown that the abnormal particles which consist of powder and adhering sublimation, slag, ceramic and organic impurities exist in the superalloy powders. The formation of abnormal particles has a close relationship with the purity of master alloys, properties of inclusions as well as powder atomization parameters. The ability of removing abnormal particles by screening and electrostatic separation was associated with the size, shape and chemical composition, physical properties(density, permittivity）of adhering inclusions. Compared with the screening process, the number of abnormal particles in 1kg powder sample reduce by 63% after electrostatic separation process. In 50-150μm finished powders, the abnormal particles adhering slag account for 36% in residual inclusions, the particles adhering ceramic -4%, the particles adhering organic-11%.

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引用本文

張瑩,黃虎豹,劉明東,張義文. PREP 工藝制取鎳基高溫合金粉末中的異常顆粒[J].稀有金屬材料與工程,2017,46(11):3485~3490.[ZhangYing, Huang Hubao, Liu Mingdong, Zhang Yiwen. Study on abnormal particles in Ni-base Superalloy Powder by PREP Process[J]. Rare Metal Materials and Engineering,2017,46(11):3485~3490.]
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  • 收稿日期:2015-08-16
  • 最后修改日期:2016-03-30
  • 錄用日期:2016-04-26
  • 在線發(fā)布日期: 2017-12-13
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