摘要
试验研究了整形后的激光热冲击蠕墨铸铁气缸盖。通过红外测温仪监测特征点温度波动;采用CCD摄像头监控试样的表面状态。通过扫描电镜(SEM)、光学显微镜(OM)和硬度仪表征了热冲击试验后试样的组织和硬度变化。结果表明:蠕墨铸铁气缸盖通过2000次热冲击;热冲击试验后蠕墨铸铁气缸盖的组织和硬度没有明显变化,说明在热冲击试验温度范围蠕墨铸铁气缸盖的性能稳定。
Experiment of thermal shocking was conducted by laser on cylinder head of graphite cast iron.Infrared pyrometers were mounted on the top of the workbench to sample the transient surface temperatures.The high resolution CCD cameras were employed to sample transient images of the cylinder head.Microstructure of thermal shocking specimen was characterized by scanning electron microscopy（SEM） and optical microscope（OM）.Mechanical properties of thermal fatigue specimen were evaluated by hardness.Results show that microstructure and hardness are not obviously changed,which mean that cylinder head of graphite cast iron has performance stabilization within the rang of thermal shocking temperature.
出处
《机电工程技术》
2011年第1期72-74,113,共3页
Mechanical & Electrical Engineering Technology
关键词
激光
热冲击
气缸盖
组织
硬度
laser
thermal shocking
cylinder head
microstructure
hardness
