Structure and properties of titanium surface layers after electron beam alloying with powder mixtures containing carbon
Structure and properties of titanium surface layers after electron beam alloying with powder mixtures containing carbon
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DOI：
10.1016/j.apsusc.2015.07.043
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发表时间：
2015-11
影响因子：
6.7
通讯作者：
O. Lenivtseva;I. Bataev;M. Golkovskii;A. Bataev;V. V. Samoilenko-V.;N. Plotnikova
中科院分区：
文献类型：
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作者：
O. Lenivtseva;I. Bataev;M. Golkovskii;A. Bataev;V. V. Samoilenko-V.;N. Plotnikova
研究了非真空电子束表面碳合金化商业纯钛（cp-Ti）样品的结构和摩擦学性能。使用两种类型的粉末在 cp-Ti 表面层引入碳：碳化钛 (TiC) 和纯钛与石墨的混合物 (“Ti + C”)。研究了单层和多层涂层。应用电子束进行合金化可提供 4.5 m2/h 的熔覆速率。复合涂层的厚度为 1.6–2.0 毫米。 “Ti+C”粉末熔覆后得到的主要相是α-钛、TiC和残留石墨。在通过包覆TiC获得的样品中，没有观察到石墨。决定熔覆层显微硬度和摩擦学性能的因素是TiC的体积分数。通过熔覆单层 TiC 粉末或两层“Ti + C”混合物，获得了最大 8 GPa 的涂层显微硬度。进行了两种类型的测试来评估样品的耐磨性。在针对松散磨粒的摩擦测试中，最佳样品的磨损率比 cp-Ti 低 9.3 倍。在使用固定磨粒的磨损试验中，最佳样品的相对耐磨性比cp-Ti高2.3倍。
The structure and tribological properties of commercially pure titanium (cp-Ti) samples after non-vacuum electron beam surface alloying with carbon were studied. Two types of powders were used to introduce carbon in surface layer of cp-Ti: titanium carbide (TiC) and mixture of pure titanium and graphite (“Ti + C”). Single layer and multilayer coatings were studied. Application of electron beam for alloying provided cladding rate of 4.5 m2/h. The thickness of the clad coatings was 1.6–2.0 mm. The main phases received after “Ti + C” powder cladding were α-titanium, TiC, and retained graphite. In the samples obtained by cladding of TiC, graphite was not observed. A factor determining the microhardness and tribological properties of the cladded layer was the volume fraction of TiC. Maximum coating microhardness of 8 GPa was obtained by cladding of single layer of TiC powder or two layers of the “Ti + C” mixture. Two types of tests were carried out to evaluate the wear resistance of the samples. In friction tests against loose abrasive particles, the wear rate of the best samples was 9.3 times lower than that of cp-Ti. In wear tests using fixed abrasive particles, the relative wear resistance of the best samples was 2.3 times higher than that of cp-Ti.