吳維tao2， 王茂才2， 文効忠3
(1. 沈陽(yáng)工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院， 沈陽(yáng) 110023；
2. 中國(guó)科學(xué)院金屬研究所 金屬腐蝕與防護(hù)國(guó)家重點(diǎn)實(shí)驗(yàn)室， 沈陽(yáng) 110016；
3. 香港理工大學(xué), 香港, 九龍)
摘 要: 利用Cr3C2和TiC生成自由能和穩(wěn)定性的差異，通過(guò)激光熔化法在Ti6Al4V表面制備TiC顆粒增強(qiáng)鈦基復(fù)合材料涂層。結(jié)果表明：選擇合適的激光處理工藝，可使Cr3C2和Ti合金粉末通過(guò)原位結(jié)晶置換反應(yīng)生成TiC/Ti復(fù)合材料熔覆層；亞微米級(jí)的TiC顆粒均勻地分布于復(fù)合材料的基體中，復(fù)合材料的基體組織隨合金粉末的成分不同而改變。
關(guān)鍵字: 鈦合金； 激光熔覆； 復(fù)合材料涂層； 原位自生
Ti-based composite coating induced by laser melting
WU Wei-tao2，WANG Mao-cai2， H.C.Man3
（1. School of Materials Science and Engineering, Shenyang Polytechnic
University，Shenyang 110023, P.R.China;
2. State Key Lab for Corrosion and Protection， Institute of Metals Research，
The Chinese Academy of Sciences， Shenyang 110016， P.R.China;
3. The Hong Kong Polytechnic University, Hong Kong， Kowlong）
Abstract:A new Ti-based composite coating reinforced with fine and dispersive TiC particles was prepared on Ti-alloy of Ti6Al4V by laser induced reaction of Cr3C2 and Ti with respecting the large difference of the thermal stability between Cr3C2 and TiC. The results show that laser induced melting is helpful for the formation of this kind of composite coating provided a suitable sets of processing parameters and the ratio of Cr3C2 to Ti are selected. The in-situ replacing reaction of Cr3C2 with Ti does surely produce a TiC/Ti composite layer containing fairy uniformly distributed fine TiC particles of sub-micrometers and with good bonding to the substrate. The microstructure of the coating can easy be controlled by varying the chemical composition of the powder mixtures pre-placed and also the processing parameters.
Key words: titanium alloy; laser cladding; composite coatings; in-situ synthesis
