(江蘇大學(xué) 機(jī)械工程學(xué)院 先進(jìn)成形技術(shù)研究所, 鎮(zhèn)江 212013)
摘 要: 采用常規(guī)噴焊工藝和改進(jìn)噴焊工藝， 在Ti-6Al-4V合金表面上制備了鎳基耐磨涂層， 分析了涂層的形貌和合金元素的擴(kuò)散， 測(cè)試了涂層的顯微硬度， 定性地研究了基體和涂層的結(jié)合性能。 結(jié)果表明： 改進(jìn)工藝所制備的涂層組織和性能均優(yōu)于常規(guī)工藝的， 涂層組織的均勻性大大提高， 晶粒得到細(xì)化； 基體和涂層為明顯的冶金結(jié)合； 涂層顯微硬度的變化沿層深方向呈連續(xù)性和漸變性， 其表層顯微硬度高達(dá)HV933.2。 采用合理的噴焊工藝能夠在鈦合金表面制備出性能優(yōu)良的耐磨涂層。
關(guān)鍵字: 鈦合金； 鎳基涂層； 火焰噴焊； 顯微組織； 性能
LIU Xi, CHEN Kang-min, PAN Li
（ Institute of Advanced Forming Technology, School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China）
Abstract: The Ni based wear resistance coatings on the Ti-6Al-4V alloy substrate by common flames spray-welding technique and flames spray-welding improved technique were prepared. The microstructures and the elements distributions of coating were analyzed, and the microhardness and adhesion properties were studied. The results show that the microstructures and properties of coating prepared by the improved technique have been improved obviously, the uniformity of coating microstructure is improved and its grains become smaller, the adhesion of the substrate and the coating is metallurgical bonding. The change of microhardness for coating are continuous and gradual along depth direction, and the microhardness of spray-welding surface is HV933.2. It indicates that adopting improved spray-welding technique is able to prepare excellent wear resistance coating on the titanium alloys substrate.
Key words: titanium alloy; Ni-based coating; flames spray-welding; microstructure; property
