成分偏析对连铸10NiCrCu船用钢板板厚方向性能影响  

The Influence of Composition Segregation on the Properties in Thickness Direction of 10NiCrCu Steel Produced by Continuous Casting

作　　者：陈爱志 彭冀湘[2] 徐嘉隆[2] 杨澍[2] 

机构地区：[1]海军驻葫芦岛四三一厂军事代表室,辽宁葫芦岛125004 [2]中国船舶重工集团公司第七二五研究所,河南洛阳471023

出　　处：《材料开发与应用》2014年第4期34-39,共6页Development and Application of Materials

摘　　要：通过原位统计分布分析试验和金相组织观察,研究了连铸工艺生产的10NiCrCu船用钢板板厚方向的成分偏析和组织分布情况,并用Z向拉伸试验和微剪切试验研究了成分偏析对其板厚方向性能的影响。结果表明,合金元素在连铸10NiCrCu船用钢板板厚中心均呈正偏析,这种成分偏析特点使得板厚中心的珠光体含量多于钢板表面的。所有元素中C、P和S的偏析程度相对较大,其它元素的偏析程度相对较小。成分偏析对板厚方向的强度影响较小,对塑性影响相对较大,板厚方向的塑性总体下降15.5%,其中67%的塑性下降是由于板厚中心的偏析引起的。The composition segregation of 10 NiCrCu steel produced by continuous casting was characterized through orginal position statistic distribution analysis test,and its microstructure was observed by metallographic microscope. The properties in thickness direction of 10 NiCrCu steel produced by continuous casting were investigated through tensile and tear test. The results showed that alloy elements distributed in positive segregation at the centre of steel thickness,and it made pearlite at the centre of steel thickness was more than that of the surface. Of all the elements,the segregation degree of C,P and S were great,the others were minor. The influence of composition segregation on the strength in thickness direction was slight,but its influence on the plasticity was great. The plasticity in thickness direction declined about 15. 5% totally,in which the plasticity at the centre of steel thickness declined mostly due to composition segregation.

关 键 词：连铸 偏析 板厚方向 性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程]