Mn/Si值对高强钢埋弧焊熔敷金属韧性的影响

Influence of Mn/Si on Microstructure and Toughness of High Strength Steel SAW Deposited Metals

摘要: 通过对不同Mn/Si值熔敷金属的低温冲击试验、金相分析和TEM分析,研究了Mn/Si值对组织、夹杂物形态和低温韧性的影响。结果表明,随着Mn/Si值的变化,高强钢埋弧焊熔敷金属低温韧性也发生变化,当Mn/Si值处于4~8之间时,熔敷金属-50℃冲击值达到100 J,而Mn/Si值低于或高于此区间,则低温韧性均下降。

Abstract: The low temperature toughness test,microstructure analysis,TEM analysis were conducted in high strength steel SAW deposited metals with different Mn/Si.The relations between microstructure,form of inclusion and low temperature toughness were investigated.The result indicates that with the change of Mn/Si in high strength steel SAW deposited metals,the low temperature toughness changes.When Mn/Si=4~8,the deposited metals toughness attained 100 J at-50℃ and when Mn/Si<4 or >8,the toughness declined.