采取低倍、高倍检测以及扫描电镜对渗碳齿轮用钢18Cr Ni Mo7-6低倍夹杂缺陷进行成分分析,判定夹杂主要成分是Al2O3。产生夹杂的原因是较多的脱氧产物没有来得及上浮,形成夹杂物留在钢液中。通过对冶炼过程用铝量分析,在吨钢用铝量一定...采取低倍、高倍检测以及扫描电镜对渗碳齿轮用钢18Cr Ni Mo7-6低倍夹杂缺陷进行成分分析,判定夹杂主要成分是Al2O3。产生夹杂的原因是较多的脱氧产物没有来得及上浮,形成夹杂物留在钢液中。通过对冶炼过程用铝量分析,在吨钢用铝量一定的前提下,提高沉淀脱氧用铝量,降低扩散脱氧用铝量,可减少夹杂物的产生。展开更多
Structural manipulation of graphene oxide (GO) building blocks has been widely researched. Concerning GO membranes for separation applications, the validity and maintenance of their microscopic structures in the chemi...Structural manipulation of graphene oxide (GO) building blocks has been widely researched. Concerning GO membranes for separation applications, the validity and maintenance of their microscopic structures in the chemical environment are pivotal for effective separation at the molecular scale. Cationic interactions with both aromatic rings and oxygenated functional groups of GO make metal ions intriguing for physically and chemically structural reinforcement. By filtrating GO suspension through the substrate loaded with cations, stacking o f GO nanosheets and diffusion of cations steadily evolve simultaneously in an aqueous environment without flocculation. Thus, thin and homogeneous GO membrane is obtained. Divalent and monovalent cations were studied regarding their interactions with GO, and the performance of correspondingly functionalized membranes was evaluated. The divalent cation-stabilized membranes have favorable stability in the separation of water/ethanol. This facile fabrication and functionalization method may also be applicable for structure construction of other two-dimensional materials.展开更多
文摘采取低倍、高倍检测以及扫描电镜对渗碳齿轮用钢18Cr Ni Mo7-6低倍夹杂缺陷进行成分分析,判定夹杂主要成分是Al2O3。产生夹杂的原因是较多的脱氧产物没有来得及上浮,形成夹杂物留在钢液中。通过对冶炼过程用铝量分析,在吨钢用铝量一定的前提下,提高沉淀脱氧用铝量,降低扩散脱氧用铝量,可减少夹杂物的产生。
基金financially supported by the National Natural Science Foundation of China (21476107, 21490585, 21776125 and 51861135203)the Innovative Research Team Program by the Ministry of Education of China (IRT17R54)the Topnotch Academic Programs Project of Jiangsu Higher Education Institutions (TAPP)
文摘Structural manipulation of graphene oxide (GO) building blocks has been widely researched. Concerning GO membranes for separation applications, the validity and maintenance of their microscopic structures in the chemical environment are pivotal for effective separation at the molecular scale. Cationic interactions with both aromatic rings and oxygenated functional groups of GO make metal ions intriguing for physically and chemically structural reinforcement. By filtrating GO suspension through the substrate loaded with cations, stacking o f GO nanosheets and diffusion of cations steadily evolve simultaneously in an aqueous environment without flocculation. Thus, thin and homogeneous GO membrane is obtained. Divalent and monovalent cations were studied regarding their interactions with GO, and the performance of correspondingly functionalized membranes was evaluated. The divalent cation-stabilized membranes have favorable stability in the separation of water/ethanol. This facile fabrication and functionalization method may also be applicable for structure construction of other two-dimensional materials.
