建筑高性能结构钢Q690GJC手工电弧焊焊接工艺研究  

STUDY ON MANUAL ARC WELDING TECHNOLOGY OF HIGH-PERFORMANCE STRUCTURAL STEEL Q690GJC FOR BUILDINGS

作　　者：傅彦青[1,2] 周成[1] 刘菲[2] 李娜[3] 王磊[4] 马计平[2] 肖静[2] 符定梅[2] 李业绩[2] 

机构地区：[1]北京科技大学,北京100083 [2]中冶建筑研究总院有限公司,北京100088 [3]国家知识产权局专利局专利审查协作北京中心,北京100083 [4]中国建筑设计研究院有限公司,北京100044

出　　处：《工业建筑》2016年第7期57-60,共4页Industrial Construction

基　　金：国家科技支撑计划(2012BAJ13B01)

摘　　要：通过研究建筑高性能钢Q690GJC的力学、化学性能及组织结构,初步选定与之匹配的焊条,并对其进行力学性能的复检、化学成分分析、扩散氢试验,结果表明所选焊条满足要求。对钢材的冷裂敏感指数进行计算,研判其冷裂纹倾向;根据斜Y型坡口焊接裂纹试验确定最低预热温度为120℃。在此基础上,经焊接工艺评定试验,评定结果合格,满足GB 50661—2011《钢结构焊接规范》规定的要求。Through the research on the chemicomechanical properties and microstructure of high performance steel Q690 GJC for building it was initially selected the matching welding rod,and the mechanical properties re-inspection,chemical composition analysis and diffusible hydrogen test of the welding rod were carried out,the results showed that the selected electrode could meet the requirements. The cold crack sensitivity index of the steel was calculated to evaluate the cold cracking tendency. According to the oblique Y groove welding crack test,determine minimum preheat temperature（ 120 ℃） was determined. On the basis of this,after the welding procedure qualification test,the result was qualified,which could meet the requirements of Steel Structure Welding Code（ GB 50661—2011）.

关 键 词：冷裂敏感指数(Pcm) 斜Y坡口焊接裂纹试验 焊接工艺评定试验 

分 类 号：TU758.11[建筑科学—建筑技术科学]