【摘要】 通过焊丝向焊缝中加入不同合金元素,研究这些合金元素对焊缝强度、冲击韧性尤其是低温冲击韧性的影响。结果表明,尽管所加合金元素不同,焊缝金属冲击功与温度关系曲线上平台能均具有较高水平,但焊缝金属低温冲击韧性受合金化程度的影响较大。采用Ti、B及Ni等元素多元合金化的焊缝金相组织中针状铁素体比例高,具有较高的低温冲击韧性和强度。更多还原

【Abstract】 By adding the alloy elements,the influences of these elements on the strength and toughness of seam,especially on the low temperature toughness were researched.The results show that the upper shelves of the Charp V transition curves for the weld metals maintain high level despite the different alloying elements.However,the influence of alloying degree on the low-temperature toughness is significant.Weld seam multi-alloyed with Ti ,B,Ni and so on have high volume fractions of acicular ferrite in the metallographs,which has high strength and toughness.更多还原