摘要
采用均匀设计法对X100管线钢埋弧焊用烧结焊剂进行设计,选用其中5种高碱度氟碱性焊剂,配合焊丝进行埋弧自动焊接试验,着重分析了两种焊剂焊接接头的拉伸性能、金相组织、硬度、冲击吸收功及冲击断口形貌等.结果表明,焊剂中适量添加MnO对焊剂工艺、接头韧性有较大影响,它可以提高焊缝熔深,增加渣的流动性,抑制咬边,同时抑制高温铁素体的生成而对焊缝中针状铁素体的形成有利.所研制的5种焊剂中,2号焊剂焊接接头综合性能最佳,满足X100管线钢API—5L标准要求.
The uniform design method was used to design the sintering flux for X100 pipeline steel,and five fluorine alkali fluxes with high basicity in couple with welding wire were tested by automatic submerged arc welding.The tensile properties,metallographic structure,hardness value,impact value,impact fracture appearance were analyzed for two kinds of fluxes.The result shows the addition of the appropriate amount of MnO has greater effect on process of flux and toughness of joint.It can improve the weld depth,increase the liquidity of the slag,restrain the undercutting.Meanwhile,it can inhibit the formation of high temperature ferritic structure and be beneficial to the formation of acicular ferrite.In all of five fluxes,the comprehensive performance of No.2 welded joint is the best,which meets relevant technical standards.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2012年第9期57-60,116,共4页
Transactions of The China Welding Institution
基金
陕西省自然科学基金资助项目(2012JM6003)
陕西省重点学科建设专项资助项目(00X901)
西安市科技计划资助项目(CX1250②)
关键词
X100管线钢
埋弧自动焊
力学性能
金相组织
X100 pipeline steel
automatic submerged arc welding
mechanical properties
metallographic structure
