【摘要】 钛合金表面等离子喷涂氧化锆涂层激光重熔后，得到重熔区、过渡区和热影响区。本文采用ＳＥＭ、ＴＥＭ和Ｘ射线衍射对激光重熔前后各区的相变过程进行了研究。结果表明喷涂涂层激光重熔后，重熔区Ｃ－ＺｒＯ２失稳得到Ｔ－ＺｒＯ２，但无大量的Ｍ－ＺｒＯ２出现。过渡区由熔池底部的α－Ｔｉ和其前沿的粒状ＺｒＯ２组成。粒状组织内由Ｔ－ＺｒＯ２、Ｍ－ＺｒＯ２和Ｃ－ＺｒＯ２三相组成。更多还原

【Abstract】 Coating of ZrO 2 that was sprayed onto titanium alloy surface by plasma was remelted by laser,laser remelted layer is composed by remelting zone and transiting zone and heat influence zone In this paper,phase transformation process of each zone was studied by SEM and TEM and X ray diffraction.The paper points out:after coating of ZrO 2 was remelted by laser,within remelting zone C ZrO 2 is changed to T ZrO 2,but a large amount of M ZrO 2 does not occur The transiting zone is composedy by α Ti at the bottom of molten pool and granular ZrO 2 at the front The granular structure consists of T ZrO 2,M ZrO 2 and C ZrO 2 three phase更多还原