Mechanical properties and microstructure are analyzed for the unqualified elongation problem of AH36 grade high strength hull plate.The results show that the tensile strength of the steel plate with unqualified elongation is higher,while the hard phase structure and MnS inclusions exist in the plate center.By taking measures to optimize the secondary refining process,continuous casting process,controlled rolling and controlled cooling process,the steel clean-liness,macrostructure quality of continuous casting slab and the stability of the steel plate mechanical properties are im-proved,the qualification rate of the mechanical properties for AH36 grade hull plate reaches to 100％.
关键词
船板/延伸率/控轧控冷/夹杂物
Key words
Hull plate/Elongation/Controlled rolling and controlled cooling/Inclusion
维普
万方数据