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首页> 外文会议>International Conference on Surface Engineering >Preparation and Characterization of Nickel-Based Composites Coatings Reinforced by TiB_2+WC on Stainless Steel by Laser Cladding
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Preparation and Characterization of Nickel-Based Composites Coatings Reinforced by TiB_2+WC on Stainless Steel by Laser Cladding

机译：通过激光熔覆通过TIB_2 + WC加强镍基复合材料涂层的制备与表征

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摘要

The preparation and characterization of a nickel-based composite coating reinforced by TiB_2 particles produced in situ and WC particles on stainless steel by laser cladding have been investigated. The experiment results show that the coating obtained at suitable parameters epitaxially grows from the substrate. The coating is mainly composed of γ-Ni dendrite and dispersed TiB_2 and WC particles. In the upper part of the coating, the white phase dispersed in the coatings is mainly fine batt-shaped TiB_2 particles. In the middle and bottom parts of the coating, the white phase is mainly composed of comparatively coarse equiaxial WC particles, only an small amount of fine TiB_2 particles are present. The different distribution of TiB_2 and WC should be attributed to the density difference of TiB_2, WC and Ni-based alloys and the comparatively slow scanning rate. No cracks were observed throughout the whole coating, especially in the interface, after the coating was deal with by the thermal shock experiment, which shows that the coating processes a good metallurgical bond with the substrate and the high cracking resistance.
机译：研究了通过激光覆层的原位和WC颗粒在不锈钢上产生的Tib_2颗粒增强的镍基复合涂层的制备和表征。实验结果表明，在合适的参数中获得的涂层从基材外延生长。涂层主要由γ-Ni树枝状和分散的Tib_2和WC颗粒组成。在涂层的上部，分散在涂层中的白色相是精细的BATT形TIB_2颗粒。在涂层的中间部分和底部，白色相主要由相对粗略的偶态颗粒组成，仅存在少量的细滴粒颗粒。 TIB_2和WC的不同分布应归因于TIB_2，WC和NI基合金的密度差和扫描速率相对较慢。在整个涂层中没有观察到裂缝，特别是在涂层通过热冲击实验结束后，这表明涂层处理与基材的良好冶金结合和高裂缝性。

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