摘要
研究了多种焊接工艺参数下,母材分别为16Mn和X70钢的焊接接头各部位在25℃空气中、25℃通N2除氧NACE溶液和3.5%NaCl溶液中的腐蚀行为。结果表明,针状铁素体腐蚀倾向较大,但其腐蚀速度很慢;焊接接头中针状铁素体数量对其腐蚀性能有着明显的作用,较多数量的针状铁素体对应着较强的焊缝金属抗腐蚀能力,但过量针状铁素体的出现可能会加快低合金钢焊接接头的腐蚀。
Two welding heat input were applied to 16Mn and X70 steel by SAW. The corrosion behavior of weld metal was investigated in two kinds of solution, NACE and 3.5% NaCl, respectively. The results show that corrosion tendency of acicular ferrite (AF) in weld is greater than other microstructures, but its corrosion velocity is slowly. The corrosion resistance of weld metal with AF increases with the increasing of acicular ferrite fraction, but too much acicular ferrite microstructures leads to accelerate corrosion of weld in HSLA.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2005年第11期30-34,共5页
Transactions of The China Welding Institution
基金
国家自然科学基金
上海宝钢集团公司联合资助基金项目(50334050)
关键词
低合金高强钢
埋弧焊
针状铁素体
腐蚀
极化电阻
Composition
Corrosion resistance
Ferrite
Polarization
Scanning electron microscopy
Welds
