Thermal fatigue crack initiation and propagation paths of the high-chromi-um, middle Ni-Cr, adamite(165CrNiM.) and 9Cr2 (the forged steel) rollmaterials have been investigated. Thermal fatigue resistance of the four mater-ials has been evaluated.

• 本文研究高Cr铸铁、中Ni-Cr激冷铸铁、半钢(165CrNiMo)及锻钢(9Cr2)四种热轧辊材料的热裂纹萌生特点和扩展途径,并对四种材料热疲劳抗力进行了评价。