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鈦合金表面激光熔化沉積鈦基復(fù)合材料涂層的組織及性能
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國(guó)家自然科學(xué)基金(50871023); 國(guó)家“973”計(jì)劃資助項(xiàng)目(2006CB605206-1)


Microstructure and Properties of Laser Melting Deposited Titanium Matrix Composite Coating on Titanium Alloy
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    通過激光熔化沉積TA15+30%TiC(體積分?jǐn)?shù))混合粉末，在TA15鈦合金表面制備出鈦基復(fù)合材料涂層，分析了涂層的組織、硬度及界面結(jié)合強(qiáng)度。結(jié)果表明，激光熔化沉積過程中原始TiC顆粒發(fā)生溶解，并在凝固過程中重新析出細(xì)小的TiC，TiC有等軸狀及枝晶兩種形態(tài)，涂層中存在部分未熔的TiC顆粒；涂層硬度達(dá)HRC 60；涂層與基體界面為完全冶金結(jié)合，涂層的界面結(jié)合強(qiáng)度大于310 MPa，抗剪切強(qiáng)度為330 MPa；經(jīng)彎曲及熱震試驗(yàn)后，涂層未出現(xiàn)剝落現(xiàn)象，表明涂層與基體具有很好的相容性

    Abstract:

    Titanium matrix composite coatings were prepared on TA15 titanium alloy surface through laser melting depositing pre-mixed TA15+30%TiC powders (volume fraction). The microstructure, the hardness and the interface bonding strength of the coating were investigated. The results show that during the laser melting deposition process, original TiC particulates dissolved and re-precipitated fine TiC in the solidification process. The precipitated TiC presented two different morphologies, i.e. equiaxed and dendrite. There were some unmelted TiC particulates in the coating. The hardness of the coating was up to HRC 60. The coating was metallurgical bonded with the substrate. The interface bonding strength was higher than 310 MPa and the shearing strength of the coating were 330 MPa. There was no debonding after bending and thermal shock tests, indicating the good compatibility of the coating with the titanium alloy substrate

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張永忠,金具濤,黃 燦,石力開.鈦合金表面激光熔化沉積鈦基復(fù)合材料涂層的組織及性能[J].稀有金屬材料與工程,2010,39(8):1403~1406.[Zhang Yongzhong, Jin Jutao, Huang Can, Shi Likai. Microstructure and Properties of Laser Melting Deposited Titanium Matrix Composite Coating on Titanium Alloy[J]. Rare Metal Materials and Engineering,2010,39(8):1403~1406.]
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  • 收稿日期:2009-08-24
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