激光重熔对纳米Ni-Al2O3复合镀层拉伸性能的影响
Effects of Laser Remelting on Tensile Property of Ni-Al2O3 Nano-composition Coating
陈劲松, 乔 斌, 杨建明, 贺毅强
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作者单位：(淮海工学院 机械工程学院, 江苏 连云港 222005)
中文关键字：激光重熔； 纳米复合镀层； 喷射电镀； 抗拉强度； 伸长率
英文关键字：laser remelting; nano-composite coating; jet-electroplating; tensile strength; extensibility
中文摘要：利用喷射电镀方法在45钢基体表面制备了Ni-Al2O3纳米复合镀层，并对其进行了激光重熔处理。分析了Ni-Al2O3复合镀层和激光重熔层的微观组织，分别测试了基体材料、经过激光作用前后的复合镀层的拉伸性能。结果表明：在优化的实验参数条件下，喷射电镀工艺能够制备出1.44wt%的纳米Ni-Al2O3的复合镀层，镀有纳米复合镀层的试件抗拉强度和伸长率高于基体材料，经过激光重熔后的试件的抗拉强度和伸长率进一步提高。
英文摘要：Ni-Al2O3 nano-composition coating on the surface of 45 steel was prepared using jet-electroplating technology, then the coating was processed by laser remelting, the microstructure of laser cladding coating was analyed and tensile properties were tested. The results show that the nano-Al2O3 particles content in the composite which is fabricated by jet-electroplating under the optimum procession parameters is up to 1.44 wt%. The tensile strength and extensibility of the nano-composition coating prepared by jet-electrodeposition are increased obviously compared with 45 steel substrate, and increased more by laser remelting.