为了研究CO_(2)气体激光焊机退火功率对DP780带钢焊缝质量的影响,通过焊缝在线监测系统(Quality Control Date System,QCDS)、杯突试验、冷轧连续产线实际生产试验的方法,测试了不同退火功率下DP780带钢的焊缝质量。结果表明:焊接后退...为了研究CO_(2)气体激光焊机退火功率对DP780带钢焊缝质量的影响,通过焊缝在线监测系统(Quality Control Date System,QCDS)、杯突试验、冷轧连续产线实际生产试验的方法,测试了不同退火功率下DP780带钢的焊缝质量。结果表明:焊接后退火功率为0 kW时,焊缝区域杯突试验裂纹沿焊缝方向展开,焊缝质量不合格;焊接后退火功率为10、15 kW时,杯突试验结果表明焊缝区域裂纹垂直于焊缝方向,焊缝质量合格;然而实际生产得到退火功率为10 kW的焊缝在生产过程中出现断带,退火功率为15 kW的焊缝无断带现象。为此,通过电子显微镜观察了退火功率为10 kW与15 kW时DP780带钢焊缝区域金相组织,并测试了其显微硬度。结果表明:焊焊缝区域组织均为马氏体+贝氏体组织,但退火功率为10 kW的焊缝区域存在裂纹缺陷,是其断带的主要原因。因此,实际生产中应将退火功率控制为15 kW,此时焊缝区域硬度略有下降,但是韧性得到了提高,能够满足冷轧连续产线正常运行的需要。展开更多
The surface morphology of Zn O films at different annealing temperatures and the performance of polymer solar cells(PSCs) with Zn O as the electron transport layer are studied.The low temperature sol-gel processed Zn ...The surface morphology of Zn O films at different annealing temperatures and the performance of polymer solar cells(PSCs) with Zn O as the electron transport layer are studied.The low temperature sol-gel processed Zn O film has smoother surface than that in higher temperature,which results in the best photovoltaic performance with a power conversion efficiency(PCE) of 3.66% for P3HT:PC61BM based solar cell.With increasing annealing temperature,the photovoltaic performance first deceases and then increases.It could be ascribed to the synergy effects of interface area,the conductivity and surface energy of Zn O film and series resistance of devices.展开更多
基金supported by the Independent Innovation Foundation of Shandong University(No.2014YQ015)
文摘The surface morphology of Zn O films at different annealing temperatures and the performance of polymer solar cells(PSCs) with Zn O as the electron transport layer are studied.The low temperature sol-gel processed Zn O film has smoother surface than that in higher temperature,which results in the best photovoltaic performance with a power conversion efficiency(PCE) of 3.66% for P3HT:PC61BM based solar cell.With increasing annealing temperature,the photovoltaic performance first deceases and then increases.It could be ascribed to the synergy effects of interface area,the conductivity and surface energy of Zn O film and series resistance of devices.