大线能量低焊接裂纹敏感性钢的焊接(二)——热影响区组织及晶内铁素体形核机理研究  

Welding of High Heat Input Welding Steel with Low Susceptibilityto Welding Crack(Ⅱ)--Research on the Microstructure and Mechanism of Nucleationof IGF in the HAZ

作　　者：张莉芹[1] 陈晓[2] 

机构地区：[1]武汉科技大学 [2]武汉钢铁(集团)公司技术中心卜勇

出　　处：《压力容器》2002年第8期35-38,共4页Pressure Vessel Technology

摘　　要：利用焊接热模拟技术和透射电子显微镜对大线能量低焊接裂纹敏感性钢的焊接热影响区(HAZ)组织及晶内铁素体 (IGF)的形核机理进行了试验研究。通过对大线能量焊接 (10 0kJ/cm)条件下HAZ中IGF精细组织分析 ,认为IGF非均匀形核核心主要为富含MnS和Si元素的Ti2 O3复合粒子。The mechanism of nucleation of intra-granular ferrite (IGF) in the heat-affected zone (HAZ) of high heat input welding steel with low susceptibility to welding crack using welding simulation technology and TEM was investigated. It was indicated that the main heterogeneous nuclei for IGF under high heat inputs welding (100kJ/cm) were Ti oxide composite inclusion particles of which Mn,sulfides and Si enriched.

关 键 词：压力容器 大线能量焊接 焊接热模拟 热影响区 晶内铁素体 形核机理 

分 类 号：TH49[机械工程—机械制造及自动化] TG457.5[金属学及工艺—焊接]