文献类型：期刊文献

中文题名：不同热处理状态下镍基耐蚀合金析出相的定性定量分析

英文题名：Qualitative and quantitative analysis of precipitate phases in nickel-based corrosion resistant alloys with different isothermal situation

作者：缪乐德[1,2];张毅[2];杨建强[2];张春霞[2];张忠铧[2];蓝闽波[1]

机构：[1]上海市功能性材料化学重点实验室,分析测试中心,华东理工大学,上海200237;[2]宝山钢铁集团中央研究院,上海201900

年份：2015

卷号：35

期号：1

起止页码：6

中文期刊名：冶金分析

外文期刊名：Metallurgical Analysis

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

语种：中文

中文关键词：镍基耐蚀合金;金属间相;热处理;电解;定性定量分析

外文关键词：nickel-based corrosion resistant alloy; inter qualitative and quantitative analysis metallic phase; isothermal treatment ; electrolysis;

摘要：镍基耐蚀钢的性能,在很大程度上取决于钢中各种相的数量、组成、大小、分布状况和合金元素在晶界的分配情况。镍基耐蚀钢经过等温热处理,通常会形成碳化物相、金属间相等析出相。这些析出相在合金中的形成将导致钢的脆化,显著降低钢的塑性、韧性和耐蚀性。为了对不同热处理条件下镍基耐蚀合金析出相做定性定量分析,实验在选择好合适的电解制度后,利用电解分离方法将析出相从基体中分离。通过扫描电镜(SEM)和X射线衍射(XRD)定性研究了提取后析出相的形貌以及结构特性的变化过程;并利用Rietveld全谱拟合法计算不同析出相的组成及含量,最后还讨论了析出相含量与材料耐蚀性能间的关系。实验结果表明900℃时效形成的析出相最多,且析出相的含量随时间的延长呈明显上升的趋势;腐蚀性能评价结果表明析出相的含量与平均腐蚀速率存在一定的正相关,即随着析出相含量的增加,材料的平均腐蚀速率也增加,耐蚀性能减弱。
The capability of nickel-based corrosion resistant alloy is mostly influenced by the quantity, composition, size, distribution of precipitate phase in alloy. After isothermal treatment, nickel based corrosion resistant alloy undergoes various decomposition processes, which could form precipitates of inter-metallic phase and carbides. It is well known that these precipitates lead to a reduction in creep ductility and ad versely affect the toughness and corrosion property. Qualitative and quantitative analysis of precipitate phases were carried out and the analytical procedure has been established. After choosing electrolyte and electrolytic system, electrolytic isolation was performed to extract precipitates from matrix. The residues were collected by ultrasonic cleaning and filtration after galvanostatic electrolysis. Scanning electron micro scope （SEM） and X-ray diffraction （XRD） were used to examine their structure, modality and size. The contents and elemental compositions of different precipitate phase were calculated by Rietveld method. Furthermore, the relation between percent of precipitate phase and capability of corrosion resistant was discussed. The experiments demonstrated that most precipitate phase formed at 900 ℃. For the precipitate phases at 900 ℃ with different aging time, the content and size showed significant increasing trend with the prolonging of aging time. The results of corrosion evaluation also showed strong relativity between percent of precipitate phase and capability of corrosion resistant： with the increase of percent of precipitate phase, the average corrosion rate of material also raised and the corrosion resistant capability of material declined.