3O4/Al/鐵基硬質(zhì)合金的鋁熱體系,超重力熔鑄鐵基金屬陶瓷梯度材料,分析了超重力場(chǎng)中硬質(zhì)合金顆粒在高熱高溫鐵熔體內(nèi)的運(yùn)動(dòng)特征及其致密化機(jī)制,研究結(jié)果表明,根據(jù)Stocks定律,彌散相在高溫熔體內(nèi)的運(yùn)動(dòng)速度影響因素主要有顆粒與基體熔體密度差、超重力系數(shù)、顆粒半徑及溫度等,在一定的超重力系數(shù)下,材料的致密度與氣泡尺寸、鐵熔體存在時(shí)間有關(guān)。V-Fe和Cr-Fe兩種顆粒主要集中于金屬陶瓷材料的頂端,沿超重力方向粒子尺寸逐漸減小,而Mo-Fe顆粒主要集中在金屬陶瓷材料與45鋼分界面處,不同顆粒在材料內(nèi)的分布狀況有較大差異,這是金屬陶瓷材料硬度呈梯度變化的主要原因。"/>

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超重力熔鑄鐵基金屬陶瓷材料多相運(yùn)動(dòng)學(xué)特征及其致密化機(jī)制
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1.山東農(nóng)業(yè)大學(xué) 機(jī)械與電子工程學(xué)院/山東省園藝機(jī)械與裝備重點(diǎn)實(shí)驗(yàn)室;2.中國(guó)科學(xué)院 理化技術(shù)研究所

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國(guó)家十三五智能農(nóng)機(jī)裝備重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2016YFD0701701); 山東省自然科學(xué)基金(ZR2019MEE092)；山東省現(xiàn)代農(nóng)業(yè)產(chǎn)業(yè)技術(shù)體系果品產(chǎn)業(yè)創(chuàng)新團(tuán)隊(duì)資金(SDAIT-06-12, SDAIT-06-1)


Multiphase Kinematics Characteristics and Densification Mechanism of Iron-based Metalloceramics Functionally Gradient Materials via Combustion Synthesis Infiltration under an Ultra-gravity Field
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1.College of Mechanical and Electronic Engineering;2.Institute of Physical and Chemical Technology,Chinese Academy of Sciences,Beijing

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    摘要:

    采用Fe3O4/Al/鐵基硬質(zhì)合金的鋁熱體系,超重力熔鑄鐵基金屬陶瓷梯度材料,分析了超重力場(chǎng)中硬質(zhì)合金顆粒在高熱高溫鐵熔體內(nèi)的運(yùn)動(dòng)特征及其致密化機(jī)制,研究結(jié)果表明,根據(jù)Stocks定律,彌散相在高溫熔體內(nèi)的運(yùn)動(dòng)速度影響因素主要有顆粒與基體熔體密度差、超重力系數(shù)、顆粒半徑及溫度等,在一定的超重力系數(shù)下,材料的致密度與氣泡尺寸、鐵熔體存在時(shí)間有關(guān)。V-Fe和Cr-Fe兩種顆粒主要集中于金屬陶瓷材料的頂端,沿超重力方向粒子尺寸逐漸減小,而Mo-Fe顆粒主要集中在金屬陶瓷材料與45鋼分界面處,不同顆粒在材料內(nèi)的分布狀況有較大差異,這是金屬陶瓷材料硬度呈梯度變化的主要原因。

    Abstract:

    Iron-based metalloceramics functionally gradient material (FGM) was prepared by combustion synthesis casting under an ultra-gravity field through using thermite system with Fe3O4/Al/Fe-based Cemented Carbide. Multiphase kinematics characteristics and densification mechanism of cemented carbide particles in ultra-gravity field were explored. The research results indicated that based on the Stocks rules, effect of translational speed of particles in high-temperature melts will be determined by density variation between the particles and melt, ultra-gravity coefficient, radius of particles, temperature and so on. Under certain ultra-gravity coefficient condition, material density was related to bubble size, existence time of iron melt. On the top of the material, there are mainly gathered two kinds of particles with ferrovanadium and ferrochrome, whose size will decrease follow the direction of ultra-gravity field. However, ferromolybdenum mainly gathered in the interface between FGM and 45 steel. The mostSofSdiscrepancies of distribution characteristics for different particles were exhibited because of their difference of density and melting point. The aspect leads to the gradient variation of hardness distribution for the FGM.

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宋月鵬,王征,王偉,高東升,李法德,宋占華,楊增朝,李江濤.超重力熔鑄鐵基金屬陶瓷材料多相運(yùn)動(dòng)學(xué)特征及其致密化機(jī)制[J].稀有金屬材料與工程,2020,49(7):2352~2357.[Song Yuepeng, Wang Zheng, Wang Wei, Gao Dongsheng, Li Fade, Song Zanhua, Yang Zengchao, Li Jiangtao. Multiphase Kinematics Characteristics and Densification Mechanism of Iron-based Metalloceramics Functionally Gradient Materials via Combustion Synthesis Infiltration under an Ultra-gravity Field[J]. Rare Metal Materials and Engineering,2020,49(7):2352~2357.]
DOI：10.12442/j. issn.1002-185X.20190425

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  • 收稿日期:2019-05-19
  • 最后修改日期:2019-06-15
  • 錄用日期:2019-07-02
  • 在線發(fā)布日期: 2020-08-31
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