QDateTimeAxis* m_AxisY_Time = new QDateTimeAxis();
QDateTime temp_StartTime(m_BaseDate, QTime(0, 0, 0));
m_AxisY_Time ->setTickCount(25); // 网格数
m_AxisY_Time ->setRange(temp_StartTime, temp_StartTime.addDays(1));//时间显示范围
m_AxisY_Time ->setFormat("hh:mm:ss");
chartView->chart()->setAxisY(m_AxisY_Time , series);