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Vacuum heat treatment of electroless Ni-B coatings

机译：化学镀Ni-B涂层的真空热处理

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摘要

Electroless nickel-boron plating with subsequent rapid heat treatment in vacuum has been tried on steel substrate in an effort to obtain hard engineering coatings. By selected conditions of heat treatment in a high vacuum environment (a type of rapid quenching), the plating can acquire chromium equivalent hardness without the effluents of the hard chromium plating process. The resulting surfaces were examined and characterized under an optical and a scanning electron microscope. XRD analysis was also performed to investigate re-crystallization effects. The fabricated materials were also tested under corrosion conditions and linear polarization measurements were performed. The results show that after a 5-min heat treatment in vacuum, the plating acquires a crystalline structure with very good adhesion to the substrate material, obtained so far by several weeks/months thermal treatment.
机译：为了获得坚硬的工程涂层，已经尝试在钢基底上进行化学镀镍硼并随后在真空中进行快速热处理。通过在高真空环境（一种快速淬火）中选择的热处理条件，镀层可以获得铬当量硬度，而没有硬铬镀层过程的废料。在光学和扫描电子显微镜下检查并表征所得表面。还进行了XRD分析以研究重结晶效果。所制造的材料也在腐蚀条件下进行了测试，并进行了线性极化测量。结果表明，在真空中进行5分钟的热处理后，镀层获得了一种结晶结构，该结构与基材的粘合性非常好，到目前为止，经过数周/数月的热处理后，镀层才得以获得。

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