用等离子喷涂和热轧相结合的方法制备陶瓷/陶瓷涂层钢板

Masao Murakawa, Shuichi Watanabe
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引用次数: 1

摘要

在本研究中,我们提出了一种等离子喷涂技术与连续热轧方法相结合,以实现廉价和高生产率的钢板涂覆优质材料(其中包括陶瓷和陶瓷),并使涂层与钢基体之间具有良好的附着力。本研究也旨在探讨最适合的工作参数组合,以证明该工艺的可行性。更具体地说,用这种技术制作两种涂层材料的涂层钢板;首先尝试WC-Co涂层(一种陶瓷涂层),以获得良好的耐磨性,然后尝试使用Y2O3稳定的ZrO2涂层(一种陶瓷涂层),以Ni-Cr合金为底涂层,以实现热障手段和/或高温下的防腐手段。然后研究了影响该工艺的几个因素,即涂层厚度、轧制压下率和加热温度(用于热轧),以制造具有良好金属陶瓷或陶瓷表面的涂层钢板。结果表明:涂层厚度为100 ~ 160 μm,轧制压下率低于3%,WC-Co涂层加热温度为600℃,ZrO2涂层加热温度为1100℃,可以制备出涂层与基体结合强度较喷涂时更好的涂层钢板;
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Manufacture of a cermet/ceramic coated steel plate by a combined plasma spraying and hot rolling method

In this study we propose a plasma spraying technique which is combined with the continuous hot rolling method to realize not only an inexpensive but also a high productivity manufacturing process of steel plates coated with high grade materials (among them are cermets and ceramics) and having good adhesion between the coating and the steel substrate. This study also aims at investigationg the best suited combination of working parameters to demonstrate the feasibility of this process.

More specifically, coated steel plates with two kinds of coating materials are made with this technique; first WC-Co coating (a cermet coating) is tried aiming at good wear resistance and then a Y2O3 stabilized ZrO2 coating ( a ceramic coating ) having Ni-Cr alloy as an undercoat is tried to realize a thermal barrier means and/or an anti-corrosive means at high temperatures. Then several factors governing this technique, i.e., coating thickness, rolling reduction rate and heating temperature ( for hot rolling ) are investigated in order to manufacture the coated steel plate having sound cermet or ceramic top surface.

The results are that it is possible to manufacture coated steel plates having a better adhesive strength between the coating and the substrate as compared with an as-sprayed coating by selecting a coating thickness of 100–160 μm, a rolling reduction rate of below 3% and a heating temperature of 600°C in the case of WC-Co coating and 1100°C in the case of ZrO2 coating respectively.

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