在45号钢表面,制备了WC/Co-NiCrAl等离子喷涂涂层(TC-1)和WC/Co-NiCrAl/laser-remelting激光直接重熔等离子喷涂陶瓷涂层(TC-2).以纳米SiC粉末为填料,对等离子喷涂层TC-1进行了填料下的激光重熔,制备了纳米SiC改性的WC/Co-NiCrAl/nano-SiC复合陶瓷涂层(TC-3).采用X射线衍射、扫描电镜对三种涂层微观组织进行了分析,同时对陶瓷涂层的耐腐蚀性能进行了研究.结果表明,TC-1涂层由WC,W2C,W6C2.54,W,Co,CoO组成; TC-2重熔涂层由WC,W2C,CoO及W组成;纳米改性后的重熔涂层TC-3由SiC,Si2W,WC,W及CoO组成.在激光作用下,原等离子喷涂层WC/Co的片层状组织得以消除.与TC-1涂层相比,TC-2及TC-3陶瓷涂层致密化程度明显提高,涂层耐腐蚀性能也得到了明显的改善.
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