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(9~12)%Cr马氏体耐热钢中微量B元素的择优分布行为及其对微观组织与力学性能的影响
Alternative TitlePreferential Distribution of Boron and its Effect on Microstructure and Mechanical Properties of(9~12)%Cr Martensitic Heat Resistant Steels
杨柯1; 梁烨1; 严伟1; 单以银1
2020
Source Publication金属学报
ISSN0412-1961
Volume56.0Issue:1.0Pages:53-65
Abstract(9~12)%Cr钢中添加微量B元素可显著抑制M23C6碳化物的熟化,从而提高蠕变强度,增加蠕变断裂寿命。钢中B元素的择优分布行为是其充分发挥积极作用的关键,也是深入研究其作用机理的前提,一直是(9~12)%Cr马氏体耐热钢领域的研究热点。本文简述了B元素对钢力学性能的影响,介绍了表征钢中微量B元素分布的常用实验手段。在阐述B元素在钢中的物理冶金学原理以及固溶与扩散机制的基础上,重点讨论了B元素在(9~12)%Cr马氏体耐热钢中的择优分布行为及其影响因素。最后对目前微量B元素抑制马氏体耐热钢中M23C6碳化物熟化的2种机理进行了梳理,系统地阐述了B元素的择优分布行为与其抑制M23C6碳化物熟化、提高蠕变性能的积极作用之间的关系,深化对B元素在(9~12)%Cr马氏体耐热钢中的作用机理的认识。
Other AbstractAddition of small amount of boron(B)in the(9~12)%Cr martensitic heat resistant steels can obviously prohibit the Ostwald ripening of M23C6 carbides so as to improve creep strength as well as creep rupture life.With the purpose of taking full advantages of B element,it is critical to make B preferentially distribute in(9~12)%Cr martensitic heat resistant steels.The mechanism of B preventing M23C6 carbides from ripening is also on the premise of clearly identifying the preferential distribution of B in thesteels.Much concern has been growing over the preferential distribution of B in the research of(9~12)%Cr martensitic heat resistant steels.Therefore,this article gives a review on this aspect.Following a summary of the effect of B on mechanical properties,several commonly used characterizing methods for B segregation in the steels are introduced.Based on the physical metallurgy and the solution,diffusion mechanisms of B element,discussions on the preferential distribution of B element at prior austenite grain boundaries and in the M23C6 carbides as well as the related factors are emphasized.At last,two prevalent mechanisms of B restraining the coarsening of M23C6 carbides in(9~12)%Cr martensitic heat resistant steels are given by an intensive explanation so that the relationship between the preferential distribution of B and its advantage of increasing creep performance by suppressing the ripening M23C6 carbides are systematically elaborated,which gives a deep understanding of the role of B element in(9~12)%Cr martensitic heat resistant steels.
Keyword马氏体耐热钢 B 偏聚 M23C6碳化物 Ostwald熟化
Indexed ByCSCD
Language中文
CSCD IDCSCD:6651011
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/143291
Collection中国科学院金属研究所
Affiliation1.中国科学院金属研究所
2.中国科学技术大学
Recommended Citation
GB/T 7714
杨柯,梁烨,严伟,等. (9~12)%Cr马氏体耐热钢中微量B元素的择优分布行为及其对微观组织与力学性能的影响[J]. 金属学报,2020,56.0(1.0):53-65.
APA 杨柯,梁烨,严伟,&单以银.(2020).(9~12)%Cr马氏体耐热钢中微量B元素的择优分布行为及其对微观组织与力学性能的影响.金属学报,56.0(1.0),53-65.
MLA 杨柯,et al."(9~12)%Cr马氏体耐热钢中微量B元素的择优分布行为及其对微观组织与力学性能的影响".金属学报 56.0.1.0(2020):53-65.
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