Application of original position statistic distribution analysis technique in application performance evaluation of heavy wall-thickness steel casting for welded structure
Abstract：The heavy wall-thickness steel casting were widely used in super-large welded engineering structures. The improvement of metallurgical quality for heavy wall-thickness steel casting was important to guarantee the structure safety. For the purpose of enhancing metallurgical quality control in production process of heavy wall-thickness steel casting in future, the metal original position statistic distribution analysis and thermodynamic simulation techniques were employed to conduct the elemental distribution determination and thermodynamic simulation test using the quadrate casting with side length of 1000mm. Moreover, the mechanical properties and metallographic structure of the casting were also analyzed in order to evaluate application performance. It was found that a segregated band existed in casting steel with distance of 110mm from the surface. The various degree of enrichment of C, Mn, Si and P were observed. However, there were few inclusions containing Al. An obvious negative segregation band existed about a quarter of wall thickness away from casting surface. The central porosity and segregation were obvious in the center of steel casting. Meanwhile, the inclusions rich in Al and Ti were also observed. The results showed that the segregation of C caused obvious difference of continuous transition curve and tensile property of casting in different positions, which had influence on the weldability. The metal original position statistic distribution analysis technique could comprehensively reflect the elemental segregation in casting, thus to specifically take quality control measures.
王志鹏. 原位统计分布分析在焊接结构用大壁厚钢铸件应用性能评价中的应用[J]. 冶金分析, 2019, 39(12): 16-24.
WANG Zhi-Peng. Application of original position statistic distribution analysis technique in application performance evaluation of heavy wall-thickness steel casting for welded structure. , 2019, 39(12): 16-24.
成应晋,杨澍,王杏华.大壁厚ZG230-450H铸件强度预测方法[J].铸造,2019,68(4):378-384.CHENG Ying-jin,YANG Shu,WANG Xing-hua.Strength forecasting method for ZG230-450H castings with heavy wall thickness[J].Foundry,2019,68(4):378-384.
[2]
王旭,魏军,仇圣桃,等.12Mn钢连铸圆坯的原位统计分布分析[J].冶金分析,2019,39(3):1-6.WANG Xu,WEI Jun,QIU Sheng-tao,et al.Original position statistic distribution analysis for continuous casting round billet of 12Mn steel[J].Metallurgical Analysis,2019,39(3):1-6.
[3]
左晓剑,成国光,李晶.20MnSi钢连铸方坯的原位统计分布分析[J].冶金分析,2018,38(1):9-15.ZUO Xiao-jian,CHENG Guo-guang,LI Jing.Original position statistic distribution analysis of the continuous casting billet of 20MnSi steel[J].Metallurgical Analysis,2018,38(1):9-15.
[4]
李冬玲,李江文,张穗忠,等.钢中铝系夹杂物含量的原位统计定量方法探讨[J].冶金分析,2014,34(3):1-6.LI Dong-ling,LI Jiang-wen,ZHANG Sui-zhong,et al.Study on original position statistic quantitative method for the content of aluminum inclusion in steel[J].Metallurgical Analysis,2014,34(3):1-6.
[5]
王海舟.原位统计分布分析——冶金工艺及材料性能的判据新技术[J].中国有色金属学报,2004,14(S1):98-105.WANG Hai-zhou.Original position statistic distribution analysis——new analytical method in quality evaluation of process metallurgy and metal materials[J].The Chinese Journal of Nonferrous Metals,2004,14(S1):98-105.
[6]
胡汉起.金属凝固原理[M].北京:机械工业出版社,2008.
[7]
Meng Y,Thonmas B G.Heat-transfer and solidification model of continuous slab casting:CON1D[J].Metallurgical & Material Transactions B,2003,34(5):685-705.
[8]
WANG Y,Valdez M,Sridhar S.Formation of CaS on Al2O3-CaO inclusions during solidification of steels[J].Metallurgical & Material Transactions B,2002,33B(8):625-632.
张秀鑫,贾云海,陈吉文,等.钢中铝夹杂物原位统计分布分析的判据方法[J].冶金分析,2012,26(4):1-4.ZHANG Xiu-xin,JIA Yun-hai,CHEN Ji-wen,et al.The criterion of original position statistic distribution analysis for the aluminum inclusion in steel[J].Metallurgical Analysis,2012,26(4):1-4.
[11]
王海舟.原位统计分布分析——材料研究及质量判据的新技术[J].中国科学:B辑(Science in China,Series B),2002,32(6):481-485.
