【摘要】 研究了电磁搅拌对管线钢埋弧焊熔敷金属低温韧性的影响，结果表明：电磁搅拌使０．２－０．６ μｍ的夹杂物数量增加，促进了奥氏体晶粒内针状铁素体的生成和细化，使晶内铁素体含量由８５．１％提高到９１．７％；抑制了晶界铁素体和侧板条铁素体的形成，使熔敷金属的低温冲击韧性明显提高。更多还原

【Abstract】 The effects of electromagnetic stirring on the low temperature toughness of pipe-line steel SAW deposited metal were investigated. The results show that the electromagnetic stirring increases the amount of inclusions with 0.2-0.6 μm diameter, which is suitable for the formation of acicular ferrite, promotes the formation of acicular ferrite within austenite grains and restricts the formation of grain boundary ferrite and side-plate ferrite. The low temperature charpy toughness of deposited metal is increased greatly.更多还原