【摘要】 研究了低 C- Mn- Nb系高钢级 X80管线钢中不同钼的质量分数对组织和性能的影响。结果表明 ,在此系列的钢中 ,随着钼的质量分数的增加 ,针状铁素体的量也随着增加 ,同时钢中出现贝氏体束和 M- A组织。钢的屈服强度、抗拉强度均随钼的质量分数的提高而增加 ,而抗拉强度的提高幅度要高于屈服强度 ,屈强比随 Mo的加入而降低 ,且随着 M- A组织的增多 ,钢的冲击韧性降低明显更多还原

【Abstract】 The effect of Mo on microstructure and properties of low C Mn Nb X80 high strength pipeline steel was studied It was concluded that the proportion of acicular ferrite is increased with the Mo content, the yield and tensile strengths are also increased At the same time, bainite and M A phase occur in the steel On the other hand, the yield ratio is decreased and toughness is deteriorated as the quantity of M A is increased更多还原