从高强韧管线钢的成分设计、微细夹杂物控制、奥氏体晶粒大小、热影响区微观组织、焊接工艺等几个方面阐述了各个因素对管线钢粗晶区韧性的影响,提出了改善高强韧管线钢焊接热影响区粗晶区韧性的思路与方法在于控制管线钢的合金元素、奥氏体晶粒大小、MnS的析出、控制中温转变组织以及特殊焊接工艺的开发。 The effects of various factors on the toughness of the coarsening zone of pipeline steel are described from the aspects of the composition design of high-toughness pipeline steel, the control of fine inclusions, the grain size of austenite, the microstructure of the heat affected zone and the welding process. High toughness pipeline welding heat-affected zone coarse grain toughness ideas and methods is to control the alloying elements of pipeline steel, austenite grain size, precipitation of MnS, control of the temperature transformation of the organization and the development of special welding process.