發(fā)布時(shí)間：2018-06-26 03:40

  本文選題：風(fēng)沙 + 沖蝕磨損�。� 參考：《建筑材料學(xué)報(bào)》2015年04期

【摘要】：采用氣流挾沙噴射法,在不同的沖蝕速度、角度、濃度和時(shí)間等風(fēng)沙沖蝕參數(shù)下,對(duì)鋼結(jié)構(gòu)涂層進(jìn)行了風(fēng)沙沖蝕的模擬試驗(yàn),對(duì)試驗(yàn)材料質(zhì)量損失、抗沖蝕磨損性能和微觀失效表面進(jìn)行了分析.結(jié)果表明:鋼結(jié)構(gòu)涂層的耐磨性較差;沖蝕率隨沖蝕速度呈指數(shù)增長(zhǎng),在沖蝕角度為45°時(shí)存在低速和高速2個(gè)沖蝕階段;涂層的質(zhì)量損失在沖角為45°時(shí)最大,90°時(shí)最小,表現(xiàn)出從脆性材料向塑性材料過(guò)渡的特征;低沖角時(shí),材料破壞方式以微切削作用為主,決定材料耐沖蝕性能的主要因素是其硬度;在高沖角時(shí),材料破壞方式以擠壓鑿削作用為主,決定材料耐沖擊性能的主要因素是其柔韌性;涂層質(zhì)量損失隨下沙率的增大在300g/min時(shí)出現(xiàn)峰值;涂層累積質(zhì)量損失隨時(shí)間大致呈線性增長(zhǎng),沖蝕過(guò)程存在明顯的潛伏期、加速期和穩(wěn)定期.
[Abstract]:Under different erosion parameters, such as velocity, angle, concentration and time, the wind sand erosion simulation test of steel structure coating was carried out, and the quality of the test material was lost. Erosion wear resistance and micro failure surface were analyzed. The results show that the wear resistance of the coating is poor, the erosion rate increases exponentially with the erosion velocity, there are two eroding stages at low speed and high speed when the erosion angle is 45 擄, and the mass loss of the coating is minimum when the impact angle is 45 擄and 90 擄, respectively. It shows the characteristics of transition from brittle material to plastic material. At low impact angle, the main failure mode of material is micro-cutting, the main factor determining the erosion resistance of the material is its hardness, and at high impact angle, the hardness of the material is the main factor that determines the erosion resistance of the material. The main factors determining the impact resistance of the material are its flexibility, the peak value of the coating mass loss with the increase of the lower sand rate in 300g/min, the linear increase of the coating cumulative mass loss with time, and the impact resistance of the material is mainly determined by extrusion chiseling. There are obvious latencies, accelerations and stable phases in the erosion process.
【作者單位】： 內(nèi)蒙古工業(yè)大學(xué)土木工程學(xué)院;中國(guó)電力科學(xué)研究院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(11162011,51468049) 內(nèi)蒙古自治區(qū)自然科學(xué)基金資助項(xiàng)目(2009MS0706) 國(guó)家電網(wǎng)公司科技項(xiàng)目(輸電線路環(huán)境因素若干問(wèn)題研究)
【分類(lèi)號(hào)】：TG174.4

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