Purpose

This study aims to deal with development and performance analysis of high-velocity oxy-fuel (HVOF) thermally sprayed Mo₂C-based WC-CoCr (tungsten carbine cobalt chrome) (Co-10% and Cr-4%) cermet coating deposited on the pump impeller steel 316 L.

Design/methodology/approach

In this work, a study was carried out by modifying the conventional WC-CoCr powder with a small addition of molybdenum carbide (Mo₂C). Reinforcement was done by 1–4 wt.% addition of Mo₂C feedstocks in WC-CoCr powder by using a jar ball mill process. The design of experiment was implemented for optimization of the percentage of Mo₂C feedstock. L16 (4 × 4) orthogonal array was used to design the experiments for erosion output for the input parameters namely velocity, particle size, concentration and Mo₂C proportion.

Findings

Results show that the Mo₂C-based WC-CoCr coating provides better microhardness as compared to conventional WC-CoCr coating. The present study also reveals that the deposition of conventional WC-CoCr coating has improved the wear resistance of SS 316 L by 9.98%. However, the slurry erosion performance of conventional WC-CoCr coating was improved as 69.6% by the addition of 3% Mo₂C.

Practical implications

WC-CoCr coatings are universally used for protecting the equipment and machinery from abrasion, erosion and corrosion. So, the 3% Mo₂C-based WC-CoCr can be useful in power plants and various industries like mining, chemical, automobile, cementing and food processing industries.

Originality/value

A new HVOF coating has been developed by the addition of Mo₂C feedstock in WC-CoCr powder (Co 10% and Cr 4%) and the percentage of Mo₂C feedstock was optimized to improve the tribological behavior of WC-CoCr coating.

中文翻译：

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用田口法对泵叶轮耐蚀Mo2C增强WC-CoCr涂层的性能分析

目的

本研究旨在处理高速氧燃料 (HVOF) 热喷涂 Mo ₂ C 基 WC-CoCr（钨卡宾钴铬）（Co-10% 和 Cr-4%）金属陶瓷涂层的开发和性能分析。在泵叶轮钢 316 L 上。

设计/方法/方法

在这项工作中，通过添加少量碳化钼 (Mo ₂ C) 对常规 WC-CoCr 粉末进行改性进行了一项研究。通过使用罐式球磨机工艺在 WC-CoCr 粉末中添加 1-4 wt.% 的 Mo _{2 C 原料来进行强化。}实施实验设计以优化Mo ₂ C原料的百分比。L16（4×4）正交阵列被用于设计侵蚀输出的输入参数即速度，粒度，浓度和Mo ₂ C比例的实验。

发现

结果表明，与传统的 WC-CoCr 涂层相比， Mo _{2 C 基 WC-CoCr 涂层提供了更好的显微硬度。}本研究还表明，常规 WC-CoCr 涂层的沉积使 SS 316 L 的耐磨性提高了 9.98%。_{然而，通过添加 3% Mo 2} C ，常规 WC-CoCr 涂层的浆料侵蚀性能提高了 69.6% 。

实际影响

WC-CoCr 涂层普遍用于保护设备和机械免受磨损、侵蚀和腐蚀。因此，3% Mo ₂ C 基 WC-CoCr 可用于发电厂和采矿、化工、汽车、固井和食品加工等行业。

原创性/价值

_{通过在 WC-CoCr 粉末中添加 Mo 2} C 原料（Co 10% 和 Cr 4%）开发了一种新的 HVOF 涂层，并优化了 Mo ₂ C 原料的百分比以改善 WC-CoCr 涂层的摩擦学行为。