Phase transformation and microstructure evolution of pearlite heat-resistant steel during heating

被引：7
|
作者：
Li, Yaqiang [1 ]
He, Yang [1 ]
Liu, Jianhua [1 ]
Cui, Heng [2 ]
Qiu, Shengtao [3 ]
Zhang, Pei [4 ]
Zheng, Guiyun [4 ]
机构：
[1] Univ Sci & Technol Beijing, Inst Engn Technol, Beijing 100083, Peoples R China
[2] Univ Sci & Technol Beijing, Collaborat Innovat Ctr Steel Technol, Beijing 10083, Peoples R China
[3] Cent Iron & Steel Res Inst, State Key Lab Adv Steel Proc & Prod, Beijing, Peoples R China
[4] Shandong Iron & Steel Ltd, Laiwu Branch, Shandong, Peoples R China
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2020年 / 36卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Pearlite heat-resistant steel; in-situ observation; phase transformation; grain boundary; inter-phase boundary; IN-SITU OBSERVATION; STAINLESS-STEEL; FE-C; AUSTENITE; NUCLEATION; FERRITE; CARBON; REAUSTENITIZATION; TEMPERATURE; TRANSITION;
D O I：
10.1080/02670836.2020.1738071
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The phase transformation and microstructure evolution of pearlite heat-resistant steel during heating were observed with an ultra-high temperature confocal scanning laser microscope. The alpha-ferrite completely disappeared earlier than Fe3C during the formation of gamma-austenite, which is inconsistent with the fact that the Fe3C should disappear completely earlier under equilibrium conditions. After the Fe3C + alpha ->gamma transformation, static recrystallisation of gamma-austenite occurred, accompanied by the dissolution of cementite. During the gamma ->delta transformation, the delta-cell first precipitated at the triple point of the gamma-austenite grain boundaries, and then the delta-cell platelet with one tip appeared in the gamma-austenite grain. The law of delta/gamma inter-phase boundaries was analysed based on inter-phase boundary types and element diffusion.
引用
收藏
页码：771 / 782
页数：12
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