The test of coffin model thermal-fatigue in notched plate specimen of the4Cr5MoSiV1 steel has been made, by self-made testing machine of the highfrequency heating and the draught quenching.

• 利用自制的高频感应加热、吹风冷却式试验机,对4Cr5MoSiVl钢缺口板状试样进行了Coffin型热疲劳试验。