激光熔覆ZrO_2-8%Y_2O_3涂层提高轧辊抗热冲击性能的研究  

Improving rolls' thermal shock resistance by laser cladding ZrO_2-8%Y_2O_3coating

作　　者：孙登月[1] 侯广义 张军营[1] 

机构地区：[1]燕山大学国家冷轧板带装备及工艺工程技术研究中心,河北秦皇岛066004

出　　处：《燕山大学学报》2014年第3期216-220,共5页Journal of Yanshan University

基　　金：河北省自然基金资助项目(E20122203008)

摘　　要：为了延长液芯大压下轧机轧辊使用寿命,提高厚板连铸连轧生产效率,从提高轧辊抗热冲击性出发,采用在轧辊表面喷涂氧化锆热障涂层的方法来提高轧辊抗热冲击性。通过对比实验,比较了等离子喷涂ZrO2-8%Y2O3涂层、激光熔覆ZrO2-8%Y2O3涂层试样的表面与截面形貌和抗热冲击性。实验结果表明:激光熔覆涂层气孔、裂纹等缺陷明显减少,涂层与轧辊基体结合强度显著增强;激光熔覆涂层提高轧辊的抗热冲击性较单纯等离子喷涂涂层轧辊提高了2.94倍。In order to extend the liquid core heavy reduction mill rolls＆#39; life and improve the slab continuous casting and rolling pro-duction efficiency, ZrO2-8%Y2O3 thermal barrier coating can be sprayed on the surface of rolls to improve its thermal shock resis-tance. In this paper, the difference of surface＆amp;section morphology and thermal shock resistance between the sample with plasma sprayed ZrO2-8%Y2O3 coating and the sample with laser cladding ZrO2-8%Y2O3 coating are analyzed using comparative experi-ments. The analyzing results show that pores and cracks of the laser cladding coating decrease obviously. The bonding strength between the base and coating are increased significantly. The thermal shock resistance of rolls with laser cladding coating is incre-ased 2.94 times of that with plasma sprayed coating.

关 键 词：ZrO2-8%Y2O3 等离子喷涂 激光熔覆 抗热冲击性 

分 类 号：TG174.442[金属学及工艺—金属表面处理]