摘要
本文采用物理模拟技术以及现代工程测试技术和分析技术对X 80管线钢焊接粗晶区进行了模拟研究,通过对比法对模拟粗晶区和焊管粗晶区的组织结构特征进行对比和分析,得出模拟组织能较好地反映实际焊接热影响区组织的真实情况。发现焊接热影响区的粗晶区在低焊接热输入条件下可获得较好的韧性值,但在高焊接热输入条件下韧性会严重恶化和韧脆转变温度的升高。在实际焊接生产时外焊预热对内焊再热粗晶区的韧性有一定的改善作用。
This article describes the research of welding coarse grain heat--affected zone of X80 pipeline steel based on the physical simulate technique, modern engineering test and analysis technique. Analysing and comparing the construction of welding coarse grain heat--affected zone with simulate coarse grain heat --affected zone through compared method, we know that the simulate coarse grain heat--affected zone do a good job in reflecting the construction of welding HAZ in a real situation. The coarse grain heat-- affected zone of welding have good toughness under the condition of low welding input parameter. But under the condition of high welding input parameter, the translation temperature becomes higher and the toughness becomes worse. Under a real condition out side of weld proheating improves the tenacity of inside of weld.
出处
《内蒙古石油化工》
CAS
2008年第16期76-78,共3页
Inner Mongolia Petrochemical Industry
关键词
管线钢
粗晶区
韧性
焊接热模拟
Pipeline steel
Coarse grain heat--affected zone
Toughness
Weld simulation
