Formation of Precipitations in Ultra-Low Carbon Microalloyed Steels Treated by Rapid Tempering

被引：1
作者：
Xing, Shuqing [1 ]
Chen, Zhengzong [1 ]
Ma, Yonglin [1 ]
机构：
[1] Inner Mongolia Univ Sci & Technol, Sch Met & Mat, Baotou 014010, Inner Mongolia, Peoples R China
来源：
ADVANCES IN SUPERALLOYS, PTS 1 AND 2 | 2011年 / 146-147卷
关键词：
ultra-low carbon microalloyed steel; precipitations; thermal simulation tester; rapid tempering; HIGH-STRENGTH STEEL; MECHANICAL-PROPERTIES; ALLOYING ELEMENTS; EVOLUTION; GROWTH; CR;
D O I：
10.4028/www.scientific.net/AMR.146-147.635
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The aim of the determination is to study formation of precipitations by rapid tempering using thermal simulation tester and effects of precipitations on lower-temperature toughness property. A ultra low carbon microalloyed quenched steel containing alloying elements, such as 0.06wt%C-0.04wt%Nb-0.06wt%V-0.008wt%Ti, is tempered at 620 degrees C for holding time 70min in conventional resistance furnace, and tempered rapidly at 620 degrees C for 40s, 80s and 120s, respectively. Both microstructures and impact properties were also investigated. It was observed that the nanoscale cementite particles were obtained by rapid tempering for 40s. Furthemore, the Charpy impcat energy of these specimens holding time 40s is higher than that of others. In comparison with conventionally processed, rapid tempering for low carbon alloyed steel can achieve good toughness due to the nanoscale cementite particles and offer the potential advantage for significant time and cost savings.
引用
收藏
页码：635 / 640
页数：6
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