最新色国产精品精品视频,中文字幕日韩一区二区不卡,亚洲有码转帖,夜夜躁日日躁狠狠久久av,中国凸偷窥xxxx自由视频

Aiming at the high material cost of K418 cast super alloy impeller, the complex manufacturing process and the currently volume damage, the laser remanufacture for edge volume damage of this type was taken for target, the composition approached and process matched alloy was designed, the shape and performance was recovered by using the waveform modulated pulse laser. The results of experiments show that, there were no surface and internal cracks existed，there was metallurgical bonding between the forming layer and the substrate, the forming precision was within 1mm, the deformation precision is within 0.03mm, the surface hardness of the forming zone was 900~1400 HV0.1 , which is 20% higher than the substrate. Under the high temperature dynamic balance test, the maximum rotation of the impeller is 13500 r/min, the maximum amplitude is 0.4mm, there is no exception, no deflection and surge existed, which meet the dynamic balance performance requirements.