理化检验-物理分册2025，Vol.61Issue(5)：44-48,5.DOI:10.11973/lhjy-wl240352
水泥厂分汽缸焊接接头开裂原因
Cracking reason of welded joint of steam header in cement plant
摘要
Abstract
The cracking phenomenon of the inner surface of the weld occurred during the operation of the steam header in a cement plant.The causes of weld cracking were analyzed by means of macroscopic observation,mechanical property test,metallographic examination,scanning electron microscopy and energy spectrum analysis,X-ray diffraction and other methods.The results show that the weld spacing in the repair welding area of the cylinder was too small,which led to the formation of overheating zone in this area and the mechanical properties of the material decreased.There were misalignment and undercut defects on the weld surface,and welding residual stress was formed locally.There were a large number of alkali metal salts in the steam,which formed an alkaline corrosion environment in the material.Under the combined action of welding residual stress and alkali metal environment,the weld seam underwent alkali stress corrosion cracking.关键词
分汽缸/焊接残余应力/碱金属/应力腐蚀开裂/物相分析Key words
steam header/welding residual stress/alkali metal/stress corrosion cracking/phase analysis分类
矿业与冶金引用本文复制引用
龚光平,马源旺,张凯,张凯博,陈晨..水泥厂分汽缸焊接接头开裂原因[J].理化检验-物理分册,2025,61(5):44-48,5.基金项目
广东省特检院科技项目(2021CY-1-06) （2021CY-1-06）
