2C、M7C3、以及大量的彌散分布的TaC顆粒。復(fù)合涂層的硬度可達(dá)HV965,是Ni60涂層的1.3倍,主要是因?yàn)門aC顆粒的分布促使其內(nèi)部組織結(jié)構(gòu)改變以及相變引起的硬度上升。"/>

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原位生成WC/TaC復(fù)合激光熔覆層組織研究
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上海交通大學(xué) 機(jī)械與動(dòng)力工程學(xué)院,哈爾濱工業(yè)大學(xué) 先進(jìn)焊接與連接國(guó)家重點(diǎn)實(shí)驗(yàn)室,上海交通大學(xué) 機(jī)械與動(dòng)力工程學(xué)院,上海交通大學(xué) 機(jī)械與動(dòng)力工程學(xué)院,上海交通大學(xué) 機(jī)械與動(dòng)力工程學(xué)院

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國(guó)家自然科學(xué)基金項(xiàng)目（面上項(xiàng)目，重點(diǎn)項(xiàng)目，重大項(xiàng)目）


In-situ synthesis of WC/TaC reinforced nickel-based composite alloy coating by laser cladding
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School of Mechanical Engineering,Shanghai Jiao Tong University,State Key Lab of Advanced Welding and Joining,Harbin Institute of Technology,Harbin,,School of Mechanical Engineering,Shanghai Jiao Tong University,School of Mechanical Engineering,Shanghai Jiao Tong University

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    摘要:

    利用激光熔覆技術(shù),將氧化鉭和石墨的混合粉末添加到Ni60包WC的鎳基合金粉末中,成功制備了TaC/WC復(fù)合涂層。使用掃描電鏡(SEM)、X射線衍射儀(XRD)等儀器分析了鎳基合金復(fù)合涂層橫斷面的顯微組織,并對(duì)其硬度進(jìn)行研究分析。結(jié)果顯示在基體與涂層之間形成了良好的冶金結(jié)合,復(fù)合涂層不僅含有γ-Ni樹枝晶、W2C、M7C3、以及大量的彌散分布的TaC顆粒。復(fù)合涂層的硬度可達(dá)HV965,是Ni60涂層的1.3倍,主要是因?yàn)門aC顆粒的分布促使其內(nèi)部組織結(jié)構(gòu)改變以及相變引起的硬度上升。

    Abstract:

    An in-situ synthesized WC/TaC reinforced nickel-based composite coatings have been fabricated on AISI 1045 mild carbon steel substrate by laser cladding of powder mixture of Ni60/WC with Ta2O5 and graphite. The microstructure and hardness distribution of WC/TaC/Ni60 composite coating are investigated utilizing scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques. It is shown that the microstructure of coating has a metallurgical bonding with substrate and is mainly composed of γ-Ni dendrites, W2C, M7C3 carbides, and dispersed TaC particles. The hardness of WC/TaC/Ni60 composite coating has been enhanced to a value similar to that of HV965, which is 1.3 times higher than Ni60 coating. Measurement results demonstrated that these improvements are attributed to the presence of in-situ synthesized TaC particles, microstructure change and phase variations.

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雍耀維,傅衛(wèi),張翔,鄧琦林,楊建國(guó).原位生成WC/TaC復(fù)合激光熔覆層組織研究[J].稀有金屬材料與工程,2017,46(11):3176~3181.[Yong Yaowei, Fu Wei, zhang xiang, Deng Qilin, Yang Jianguo. In-situ synthesis of WC/TaC reinforced nickel-based composite alloy coating by laser cladding[J]. Rare Metal Materials and Engineering,2017,46(11):3176~3181.]
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  • 收稿日期:2015-12-01
  • 最后修改日期:2016-02-03
  • 錄用日期:2016-02-24
  • 在線發(fā)布日期: 2017-12-13
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