通过分析影响ZG06Cr13Ni4Mo不锈钢材料韧脆转变温度的因素, 表明δ-Fe是降低此材料的抗低温冲击能力的主要原因。对此材料进行优化, 减少δ-Fe含量, 使材料具有良好的抗低温冲击能力。随后通过扫描电镜得到低温冲击试样断口形貌, 显示此材料在极低的温度下仍保留良好的韧窝状韧性断口形貌, 随温度降低, 冲击断口会呈从完全韧窝状变成韧窝-解理状, 再到完全解理状的变化规律。

After analyzing the factors of ductile-brittle transition temperature of ZG06Cr13Ni4Mo stainless steel, which showed that the main factor was microstructure of material including δ-Fe. Making ZG06Cr13Ni4Mo stainless steel better by reduce the δ-Fe content could have good low temperature impact resistance. The appearances by scanning electron microscope showed that the material remained a good dimple fracture toughness in a lower temperatures, and the impact fracture pattern would be from dimple to dimple-cleavage, then to perfect cleavage variation with the temperature lower.