發(fā)布時(shí)間：2018-04-30 07:24

  本文選題：煤液化 + 兩相流��； 參考：《工程科學(xué)學(xué)報(bào)》2016年12期

【摘要】：采用自制的激波驅(qū)動(dòng)氣-固兩相流沖蝕磨損試驗(yàn)裝置,選取SiO_2、Al2O3和SiC顆粒,對(duì)煤化工常用材料1Cr9Mo鋼進(jìn)行高速氣-固兩相流沖蝕磨損試驗(yàn)研究.結(jié)合試件表面沖蝕磨損形貌,分析沖擊速度、沖擊角度、顆粒硬度、顆粒粒徑、試件溫度等因素對(duì)材料的沖蝕磨損率的影響.結(jié)果表明:在20℃和400℃下,1Cr9Mo鋼的最大沖蝕磨損率均出現(xiàn)在15°~25°的沖蝕角之間,體現(xiàn)出典型塑性材料的沖蝕磨損特征;低角度沖蝕時(shí)磨損機(jī)理以顆粒的切削作用為主,高角度沖蝕時(shí)顆粒垂直撞擊材料表面產(chǎn)生凹坑并致使凹坑周圍的片狀物碎屑從材料表面剝離;試件沖擊速度指數(shù)在2.3~3.2范圍內(nèi),磨損率受顆粒硬度影響較大;在相同沖蝕條件下,硬度較高的Al2O3和SiC顆粒對(duì)試件的磨損率比SiO_2顆粒高一個(gè)數(shù)量級(jí);磨損率隨顆粒粒徑的增大呈現(xiàn)先遞增后下降的趨勢;在400℃時(shí)SiO_2顆粒對(duì)試件的沖蝕磨損率明顯提高,磨損率最大值約為20℃時(shí)的3倍.
[Abstract]:In this paper, a self-made shock wave driven gas-solid two-phase flow erosion wear test device was used to study the high speed gas-solid two-phase flow erosion wear test of 1Cr9Mo steel, a common material of coal chemical industry, using SiO2Al _ 2O _ 3 and SiC particles. The effects of impact velocity, impact angle, particle hardness, particle size and specimen temperature on the erosion wear rate were analyzed. The results show that the maximum erosion wear rate of 1Cr9Mo steel at 20 鈩，

本文編號(hào)：1823627