中国激光, 2018, 45 (6): 0602006, 网络出版: 2018-07-05
感应加热辅助Si细化激光熔覆沉积TC4晶粒的研究 下载: 1030次
Silicon Refinement of TC4 Grains by Induction Heating Assisted Laser Cladding Deposition
激光技术 激光熔覆沉积 感应加热 TC4 柱状晶 laser technique laser cladding deposition induction heating TC4 columnar crystal
摘要
在TC4粉末中加入不同含量的Si粉末进行激光熔覆沉积试验,研究了感应加热对试样微观组织的影响。结果表明,在没有引入感应加热的沉积态试样中,Si能够有效地细化柱状晶,柱状晶宽度由285.5 μm减小至12.1 μm。引入感应加热后,试样中柱状晶的宽度未变,但沉积方向上的部分柱状晶被打断,没有形成贯穿生长;晶内组织为α集束,且α片层上析出无规则呈弥散分布的硅化物。
Abstract
The Si powders of different contents are added into the TC4 powders and the laser cladding deposition experiment is conducted. The influence of induction heating on the microstructures of samples is investigated. The results show that, as for the as-deposited samples without the introduction of induction heating, Si can effectively refine the columnar crystals and thus their widths decrease from 285.5 μm to 12.1 μm. In contrast, after the introduction of induction heating, the widths of the columnar crystals do not change, but part of the columnar crystals in the direction of deposition are broken and thus the throughout growth does not form. In addition, the crystals consist of a large number of α colony, and the irregular and dispersed silicide precipitations occur in α lamellar.
李丽君, 王豫跃, 张安峰, 梁朝阳, 李青宇, 张金智, 张晓星. 感应加热辅助Si细化激光熔覆沉积TC4晶粒的研究[J]. 中国激光, 2018, 45(6): 0602006. Lijun Li, Yuyue Wang, Anfeng Zhang, Chaoyang Liang, Qingyu Li, Jinzhi Zhang, Xiaoxing Zhang. Silicon Refinement of TC4 Grains by Induction Heating Assisted Laser Cladding Deposition[J]. Chinese Journal of Lasers, 2018, 45(6): 0602006.