Research on low temperature centre impact performance of 24000TEU container ship's special thick and high strength ship plate
To ensure the low-temperature centre impact performance of the 24000TEU container ship's special-thick and high-strength ship plate,a low-carbon+Ti+Nb+Ni composition system is adopted to ensure both strength and toughness requirements.By using large deformation,low-temperature controlled rolling,and DQ(5 kg-water cooling),a multiphase structure mainly composed of acicular ferrite(AF)/bainite(B)with a small amount of polygonal ferrite was obtained,and the average center impact performance reached over 200 J.By optimizing the descaling speed and pass number,the problem of watermarks on the surface of special-thick and high-strength ship plates is solved.Successfully developed special-thick and high-strength ship plates with low-temperature centre impact performance,which have good toughness,welding performance,and surface quality.
special thickhigh strength ship platelow temperature centre impact performance
万方数据
维普
