工程科学学报2016，Vol.38Issue(12)：1747-1754,8.DOI:10.13374/j.issn2095-9389.2016.12.013
1Cr9Mo钢高速气-固两相流冲蚀磨损
High-speed gas-solid two-phase flow erosion of 1Cr9Mo alloy
摘要
Abstract
A self-made gas-solid erosion testing apparatus driven by shock wave was used to investigate the wear properties of 1Cr9Mo steel commonly used as manufacturing materials in the coal chemical industry,and SiO2,Al2 O3 and SiC particles were chosen as erosive particles.Combined with the surface morphology analysis of eroded specimens,high-speed erosion wear characteristics were studied under different conditions involving impact velocity,impact angle,particle hardness,particle size,and specimen temperature.The results show that when the temperature is 20 ℃ and 400 ℃,the erosion rate of 1Cr9Mo steel reaches its maximum value within an impact angle range of 15° to 25°,and the wear properties are characterized as ductile metal.At low impact angles the cutting of parti cles is the main mechanism;but at large impact angles the erosion mechanism is the exfoliation of platelets around the pits from the material surface,which is produced by the vertical impact of particles to the material surface.When the velocity exponent of 1Cr9Mo steel ranges from 2.3 to 3.2,the erosion rate is much dependent on particle hardness.Under the same erosion conditions,the erosion rate caused by Al2 O3 and SiC particles is an order of magnitude higher than that caused by SiO2 particles for they have higher hardness values.With the increase of particle size,the erosion rate increases first and then falls.The erosion rate caused by SiO2 particles at 400 ℃ increases significantly,and the maximum erosion rate is 3 times as large as that at 20 ℃.关键词
煤液化/两相流/颗粒冲蚀/磨损试验Key words
coal liquefaction/two-phase flow/particle erosion/wear tests分类
矿业与冶金引用本文复制引用
偶国富,叶浩杰,郑智剑,金浩哲,王超..1Cr9Mo钢高速气-固两相流冲蚀磨损[J].工程科学学报,2016,38(12):1747-1754,8.基金项目
国家自然科学基金委员会-神华集团有限公司煤炭联合基金资助项目(U1361107) （U1361107）
浙江省自然科学基金资助项目(LY17E060008) （LY17E060008）
高等学校博士学科点专项科研基金资助项目(20133318120004) （20133318120004）
