合金钢锭铬元素高温均质化过程的动力学分析  

Investigation on chromium distribution in chromium alloy steel ingot during homogenization at high temperatures

作　　者：彭坤[1] 杨弋涛[1] 张洪奎[2] 金曼[1] 邵光杰[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072 [2]宝钢钢铁股份有限公司特殊钢分公司,上海200940

出　　处：《材料热处理学报》2010年第5期87-91,共5页Transactions of Materials and Heat Treatment

基　　金：国家科技支撑计划课题(2007BAE51B04);宝钢股份-上海大学战略联盟项目

摘　　要：采用光学显微镜,扫描电镜及能谱仪分析了含铬合金钢锭铸态及均质化后的显微组织和元素偏析规律,建立了均质化过程中元素扩散的动力学模型,旨在奠定大型钢锭均质化制度优化的理论基础。研究结果表明,经过不同时间和温度下的均质化处理后,含铬合金钢锭的元素偏析得到不同程度的改善。本文建立的动力学扩散模型较好地反映了均质化过程中元素的变化规律。The microstructure and element segregation of chromium alloy steel ingot with large size before and after homogenizing treatment were investigated by means of optical microscope, scanning electron microscopy and EDS. Based on the experiment, a dynamics diffusion model was established. The results show that the segregation of chromium in the alloy steel ingot is improved after homogenizing treatment. The reduction of chromium segregation depends on holding time and temperature of homogenization. The dynamics diffusion model proposed can be used to optimize parameters of homogenization process.

关 键 词：均质化 偏析比 枝晶间距 动力学 合金钢 

分 类 号：TG142.33[一般工业技术—材料科学与工程]