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
Source Publication金属学报
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
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Cited Times:4[CSCD]   [CSCD Record]
Document Type期刊论文
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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
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