10CrNiCu钢拉力分层原因分析  

Analysis on the layering in tensile test of 10CrNiCu Plate

作　　者：付勇涛[1] 刘武群[1] 朱玉秀[1] 罗国华[1] 严翔[1] 陈庆丰[1] 

机构地区：[1]武汉钢铁(集团)公司研究院

出　　处：《钢铁研究》2008年第2期47-50,共4页Research on Iron and Steel

摘　　要：通过电解夹杂、金相组织和电子探针等分析测试手段对10CrNiCu钢拉伸试验中出现的分层现象进行了分析。研究结果表明:拉力分层不是存在钢板某一个部位,而是存在整个钢板上;出现拉力分层的10CrNiCu钢板性能优良,夹杂总量较低,但拉力分层处(即板厚1/2处)存在较多条状硫化物夹杂,导致拉力分层。实践证明:降低钢中w(S),添加稀土丝或矽钙丝对钢种硫化物夹杂进行变性处理,采取低过热度浇铸、弱冷慢拉等工艺措施减小钢坯的中心偏析,可以改善10CrNiCu钢拉力分层现象。This paper studies the layering in tensile test of 10CrNiCu plate by ionizing impurities, metallographic and EPMA. The results show that the layering in tensile test is existed not just on some area of plate, but on whole plate. The tested plate has good mechanical properties and the amount of impurities is very low. But there are a lot of sulfides impurities on the place of layer （ 1/2 of thickness）, which results in the layering of plate. The layering of plate can be solved by reducing the amount of S in plate, changing the impurities＇ shape by adding RE and Si-Ca wires to steel, as well as reducing central segregation by casting in low temperature and cooling the slab in slow velocity and tugging the slab in low velocity.

关 键 词：拉伸试验 分层 电子探针 夹杂物 

分 类 号：TG144[一般工业技术—材料科学与工程]