Effect of vanadium on dynamic continuous cooling transformation behavior of medium-carbon forging steels

IF 3.1 2区 材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING
Wei-jun Hui , Na Xiao , Xiao-li Zhao , Yong-jian Zhang , Yu-feng Wu
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引用次数: 10

Abstract

Dynamic continuous cooling transformation (CCT) behavior of medium-carbon forging steels microalloyed with different V contents up to 0.29% was investigated by means of dilatometric measurement, microstructural observation and hardness measurement. The results showed that the dynamic CCT diagrams were similar and the main difference was that the fields of the transformation products were shifted to the right side of the diagrams with the increase of V content, and this effect was more noticeable with an addition of 0.29% V. The Ac1 and Ac3 temperatures showed increasing trends with increasing V content, while the critical cooling rates decreased with increasing V content. The increase of V content resulted in significant increase of hardness and this tendency was enhanced with increasing cooling rate until the formation of acicular ferrite (AF). A promising approach of remarkably improving the toughness of ferritic-pearlitic medium-carbon forging steels with suitable V addition and the introduction of AF without notable penalty on its strength level was suggested.

钒对中碳锻钢动态连续冷却转变行为的影响
采用膨胀测量、显微组织观察和硬度测量等方法,研究了V含量不超过0.29%的中碳锻造钢的动态连续冷却转变(CCT)行为。结果表明:动态CCT图相似,主要区别在于随着V含量的增加,转化产物的场向图的右侧偏移,且当V含量为0.29%时,这种影响更为明显。随着V含量的增加,Ac1和Ac3温度呈上升趋势,而临界冷却速率随V含量的增加而下降。随着V含量的增加,硬度显著增加,且随着冷却速度的增加,硬度的增加趋势增强,直至形成针状铁素体(AF)。提出了一种可以显著提高铁素体-珠光体中碳锻造钢韧性而又不影响强度水平的方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
4.30
自引率
0.00%
发文量
2879
审稿时长
3.0 months
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