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Fe50-x/2Al50-x/2Crx體系摻雜鎢精礦粉激光燒結(jié)合金組織及性能研究
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遼寧工程技術(shù)大學(xué)材料科學(xué)與工程學(xué)院,遼寧工程技術(shù)大學(xué)

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TG156.99

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遼寧省自然科學(xué)基金項目（No.：２０１４０２０１５５）國家自然科學(xué)基金（No.：51274116）;


Study on Microstructure and Properties of Fe50-x/2Al50-x/2Crx with Addition Tungsten Concentrate Powders by Laser Sintering
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Liaoning technical university,Liaoning technical university

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    摘要:

    以Fe50-x/2Al50-x/2Crx（x=4,8,12,16）體系粉末為基體，摻雜1wt%的鎢精礦粉末，壓制成坯。利用激光引燃自蔓延燒結(jié)制備原位自生顆粒增強復(fù)合材料。采用OLYMPUS4000、XRD等微觀組織結(jié)構(gòu)表征手段及合金硬度、磨損性能等宏觀力學(xué)性能及腐蝕性能測試方法，研究不同Cr粉含量對燒結(jié)合金組織及性能的影響。結(jié)果表明：燒結(jié)合金物相主要為Fe3Al，Al2O3，AlCrFe2，Cr2O3及硬質(zhì)顆粒相W。當(dāng)Cr含量為8%時，燒結(jié)合金內(nèi)部針狀組織細(xì)小致密，物相有較好的分散性；磨損率相對較低，為0.38 mg/mm2。當(dāng)Cr含量為12%時，燒結(jié)合金硬度最高，為1145HV；自腐蝕電位最大，為327.643mV；腐蝕電流密度最小，為1.044mA?cm-2，腐蝕速率最低。

    Abstract:

    In situ tungsten particle reinforced Fe-Al-Cr composites were synthesized by laser induced sintering using Fe50-x/2Al50-x/2Crx (x=4, 8, 12, 16) 1wt% pct W powders. The microstructure and properties of the synthesized alloy with various Cr content were studied. By means of the observation of OLYMPUS4000, XRD, hardness test, abrasion test and corrosion resistance, studied the different Cr content for sintered alloy organization and the influence of the properties.The results showed that the sintered alloys were mainly consisted of Fe3Al, Al2O3, AlCrFe2, Cr2O3 and W phases. The needle-like microstructure is fine and good dispersed, while the abrasion rate is the lowest, about 0.38mg?mm-2, when Cr content is 8%. The hardness and correction resistance of the alloy is the best, when the content of Cr is 12%. The value of hardness, corrosion potential and passivation current density is 1145HV, 327.643mV and 1.044mA?cm-2, respectively.

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李剛,韓鳳. Fe50-x/2Al50-x/2Crx體系摻雜鎢精礦粉激光燒結(jié)合金組織及性能研究[J].稀有金屬材料與工程,2016,45(6):1505~1508.[Li Gang, Han Feng. Study on Microstructure and Properties of Fe50-x/2Al50-x/2Crx with Addition Tungsten Concentrate Powders by Laser Sintering[J]. Rare Metal Materials and Engineering,2016,45(6):1505~1508.]
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  • 收稿日期:2014-05-19
  • 最后修改日期:2014-09-17
  • 錄用日期:2014-10-30
  • 在線發(fā)布日期: 2016-10-08
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