摘要
试验在Ｇｌｅｂｌｅ－１５００模拟试验机上以加氮和不加氮１８－８型不锈钢焊缝金属为对象，进行了热塑性及其相应高温组织形态的研究。研究表明用热模拟技术对凝固组织重新加热到高温时，以激冷方式“固定”高温组织基本形态，以便室温下加以分析的方法是可行的。用该方法观察到１８－８型焊缝由于氮的加入，使焊缝金属凝固方式从先铁素体模型转变成先奥氏体模型，从组织结构上说明了加氮后焊缝热塑性（抗热裂性）下降的内在原因。
The study investigates the hot ductility and the high temperature microstructure morphology of 18-8 stainless steel weld metal with and without N addition on the Gleeble-1500 simulator. Using the thermal simulation technique,the weld metal can be heated to high temperature,then qucnched to 'freeze' the high temperature microstructure morphology. It shows that with N addition the welding solidification will be transformed from primary-ferrite mode to primary-austenite mode,which indicates inherent cause for decreasing hot-ductility of the weld metal with N added.
出处
《钢铁研究》
CAS
1997年第4期25-30,共6页
Research on Iron and Steel
关键词
不锈钢
焊缝金属
热塑性
热模拟
焊接
stainless steel weld metal thermal simulation hot ductility
