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研究了4Cr5MoVISi钢表面激光快速熔凝后的显微组织和热疲劳性能。结果指出,表面激光熔凝组织对热疲劳裂纹的萌生和扩展有明显的抑制作用。
The microstructure and thermal fatigue properties of 4Cr5MoVISi steel after rapid laser melting were studied. The results show that the surface laser fusion of the thermal fatigue crack initiation and expansion significantly inhibited.