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Laser Cladding Fe-Cr-Si-P Amorphous Coatings on 304L Stainless
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Laser Cladding Fe-Cr-Si-P Amorphous Coatings on 304L Stainless
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“863” Project (2012AA09A203); Nature Science Founding of Shandong Province (Q2008F12); Fundamental Research Funds for the Central Universities (11CX04032A, 11CX06069A)

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    摘要:

    :采用激光熔覆技術(shù)在304L不銹鋼基體表面制備了Fe-Cr-Si-P非晶復(fù)合涂層。利用光學(xué)顯微鏡(OM)、X射線衍射儀(XRD)、掃描電子顯微鏡(SEM)、電化學(xué)測試系統(tǒng)和摩擦磨損試驗機等分析了涂層的組織結(jié)構(gòu)、相組成、耐蝕及耐磨等性能。研究結(jié)果表明,激光熔覆層組織主要由表層“梅花”形樹枝晶區(qū),中心非晶區(qū)和樹枝晶結(jié)合區(qū)組成,熔覆層與基體呈現(xiàn)良好的冶金結(jié)合。熔覆層中除了非晶相外,還有少量Fe3P和Fe2Si等金屬間化合物相。涂層的硬度HV0.2約為8000 MPa,是基體硬度的4倍;腐蝕電位Ecorr和自腐蝕電流密度icorr分別為–449.3 mV和–4.34 μA/cm2;在100 N載荷下摩擦系數(shù)僅為0.076,具有較好的綜合性能。

    Abstract:

    The Fe-Cr-Si-P amorphous composite coatings were fabricated on 304L stainless steel by laser cladding. The microstructure, the phase composition, the microhardness, the corrosion and wear resistance of the coatings were analyzed by optical microscope (OM), X-ray diffraction (XRD), scanning electron microscopy (SEM), a microhardness tester, an electrochemical measurement system and a friction and wear tester. The results show that the cladding coating mainly contains plum-like dendrite crystals in the surface, an amorphous in center region and a dendrite crystals in binding zone. A good metallurgical bond is obtained between the coating and substrate. Except amorphous phase, the cladding coating contains a small amount of Fe3P and Fe2Si phases. The coating has a good performance. The microhardness HV0.2 is about 8000 MPa; the Ecorr and icorr are –449.3 mV and 4.34 μA/cm2, respectively; the frictions coefficient at the load of 100 N is 0.076.

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王彥芳,魯青龍,肖麗君,石志強. Laser Cladding Fe-Cr-Si-P Amorphous Coatings on 304L Stainless[J].稀有金屬材料與工程,2014,43(2):274~277.[Wang Yanfang, Lu Qinglong, Xiao Lijun, Shi Zhiqiang. Laser Cladding Fe-Cr-Si-P Amorphous Coatings on 304L Stainless[J]. Rare Metal Materials and Engineering,2014,43(2):274~277.]
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  • 收稿日期:2013-03-25
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  • 在線發(fā)布日期: 2014-06-03
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