Analysis and Study on the Tensile Test Separation of Hot Rolled High Strength Hull Plate
LI Yun1，WANG Hua1，QIN Hai-shan2，GU Bai3，WANG Yong4
（1. Product Making Department， Angang Steel Company Limited， Anshan 114021， Liaoning, China 2. No.1 Steelmaking Plant, Angang Steel Company Limited， Anshan 114021， Liaoning, China 3. Quality lnspection Center， Angang Steel Company Limited， Anshan 114021， Liaoning, China 4. Heavy and Medium Plate Mill， Angang Steel Company Limited， Anshan 114009， Liaoning, China）
Abstract：In order to reduce the tensile test separation ratio ,comparisons and inspection have been done between qualified and unqualified tensile test samples of hot rolled high strength hull plate with metallographic and SEM, and processing and technical parameters of each plate were gathered. With regression analysis and other statistical methods, we can know the direct reason causing the separation in tensile test sample is crack and hole which is caused by central manganese segregation. With regression analysis , we can know reducing the manganese content to 1.30% is an effective measure. The separation ratio can be reduced from 8.07% to 1.25%, and it also can be controlled steadily below 2.0% due to the lower manganese content.
李云,王华，秦海山，顾柏,王勇. 热轧高强船板拉力分层原因分析及措施[J]. 钢铁, 2012, 47(4): 98-101.
LI Yun1，WANG Hua1，QIN Hai-shan2，GU Bai3，WANG Yong4. Analysis and Study on the Tensile Test Separation of Hot Rolled High Strength Hull Plate. Iron and Steel, 2012, 47(4): 98-101.
2012, Vol. 47 
