等離子噴涂WC-12Co涂層抗沖刷磨損行為
發(fā)布時(shí)間：2018-11-20 19:51
【摘要】：目的探索WC-12Co復(fù)合涂層抗沖刷磨損的能力。方法采用大氣等離子噴涂(APS)方法在Q235鋼基體上制備WC-12Co復(fù)合涂層。用掃描電鏡(SEM)、X射線衍射儀(XRD)和能譜儀(EDS),對(duì)涂層微觀形貌和相組成及成分進(jìn)行分析。采用維氏顯微硬度計(jì)表征了涂層的力學(xué)性能。采用自制的干砂型常溫沖刷磨損試驗(yàn)機(jī)對(duì)涂層進(jìn)行沖刷磨損實(shí)驗(yàn)。結(jié)果所制備的涂層主要由WC以及少量的W2C、Co3W3C和Co6W6C相組成。涂層以機(jī)械結(jié)合方式為主,同時(shí)伴有微冶金結(jié)合。截面顯微硬度高于粘結(jié)層,其截面平均顯微硬度為1169HV0.05。WC-12Co涂層厚度為300μm,粘結(jié)層厚度為50μm。在沖刷角為60°時(shí)涂層失重率最大,為0.4788 mg/g;在30°時(shí)涂層失重率最小,為0.3696 mg/g。結(jié)論在小角度30°沖刷時(shí),具有較好的抗塑性沖刷磨損能力;在沖刷角為60°時(shí)出現(xiàn)最大的沖刷失重率,抗沖刷磨損效果較差;在大角度90°時(shí),有一定的抗脆性沖刷磨損性能。
[Abstract]:Objective to explore the ability of WC-12Co composite coating to resist erosion wear. Methods WC-12Co composite coatings were prepared on Q235 steel by atmospheric plasma spraying (APS) method. The microstructure, phase composition and composition of the coating were analyzed by scanning electron microscope (SEM) (SEM), X ray diffractometer (XRD) and energy dispersive spectrometer (EDS),). The mechanical properties of the coating were characterized by Vickers microhardness meter. The erosion wear test of the coating was carried out by using a self-made dry sand mold erosion wear tester at room temperature. Results the coating was mainly composed of WC and a small amount of W _ 2C _ (3) C _ (3) and Co6W6C. The coating is mainly mechanically bonded, accompanied by micrometallurgical bonding. The average cross section microhardness is 300 渭 m for 1169HV0.05.WC-12Co coating and 50 渭 m for bonding layer. When the scour angle is 60 擄, the weight loss rate of the coating is the highest, and the weight loss rate of the coating is the lowest at 30 擄for 0.4788 mg/g;, 0.3696 mg/g.. Conclusion when the scour angle is 30 擄, it has better resistance to plastic scour, the maximum erosion loss rate appears when the scour angle is 60 擄, the effect of erosion wear resistance is poor, and the brittleness erosion wear resistance is better when the angle is 90 擄.
【作者單位】： 新疆大學(xué)機(jī)械工程學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(51561029)~~
【分類號(hào)】：TG174.44
本文編號(hào)：2345825
[Abstract]:Objective to explore the ability of WC-12Co composite coating to resist erosion wear. Methods WC-12Co composite coatings were prepared on Q235 steel by atmospheric plasma spraying (APS) method. The microstructure, phase composition and composition of the coating were analyzed by scanning electron microscope (SEM) (SEM), X ray diffractometer (XRD) and energy dispersive spectrometer (EDS),). The mechanical properties of the coating were characterized by Vickers microhardness meter. The erosion wear test of the coating was carried out by using a self-made dry sand mold erosion wear tester at room temperature. Results the coating was mainly composed of WC and a small amount of W _ 2C _ (3) C _ (3) and Co6W6C. The coating is mainly mechanically bonded, accompanied by micrometallurgical bonding. The average cross section microhardness is 300 渭 m for 1169HV0.05.WC-12Co coating and 50 渭 m for bonding layer. When the scour angle is 60 擄, the weight loss rate of the coating is the highest, and the weight loss rate of the coating is the lowest at 30 擄for 0.4788 mg/g;, 0.3696 mg/g.. Conclusion when the scour angle is 30 擄, it has better resistance to plastic scour, the maximum erosion loss rate appears when the scour angle is 60 擄, the effect of erosion wear resistance is poor, and the brittleness erosion wear resistance is better when the angle is 90 擄.
【作者單位】： 新疆大學(xué)機(jī)械工程學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(51561029)~~
【分類號(hào)】：TG174.44
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