Nb及二次淬火对Q＆P钢组织性能的影响

doi:-

东北大学学报:自然科学版 ›› 2013, Vol. 34 ›› Issue (1): 66-70.DOI: -

Nb及二次淬火对Q＆P钢组织性能的影响

张君，丁桦，唐正友，李懋

(东北大学材料与冶金学院，辽宁沈阳110819)

收稿日期:2012-07-10 修回日期:2012-07-10 出版日期:2013-01-15 发布日期:2013-01-26
通讯作者: 张君
作者简介:张君(1987-)，男，安徽蚌埠人，东北大学博士研究生；丁桦(1958-)，女，安徽合肥人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金重点资助项目(51031001)；国家自然科学基金资助项目(50901014)；中央高校基本科研业务费专项资金资助项目(N100402006).

Effects of Nb and Final Quenching on Microstructure and Mechanical Property of Q＆P Steels

ZHANG Jun， DING Hua， TANG Zheng-you， LI Mao

School of Materials ＆ Metallurgy， Northeastern University， Shenyang 110819， China.

Received:2012-07-10 Revised:2012-07-10 Online:2013-01-15 Published:2013-01-26
Contact: ZHANG Jun
About author:-
Supported by:
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摘要/Abstract

摘要： 主要对0.19C-1.52Si-1.53Mn-0.14Al-0.048Nb和0.19C-1.52Si-1.48Mn-0.15Al两种成分的钢进行了Q＆ P(quenching and partitioning)工艺处理，并研究二次淬火对Q＆ P钢组织性能的影响.结果表明:Nb的加入能够起到细晶强化和沉淀强化的效果，提高Q＆ P钢的综合性能.强塑积最高可达到25190MPa·%.二次淬火能够提高实验钢最终的马氏体含量，并大大提高钢的抗拉强度和屈服强度，降低了实验钢的应变硬化指数和总延伸率.若不采用二次淬火则会使实验钢的塑性大大提高，综合力学性能较高.

关键词: Q＆ P工艺, 二次淬火, 力学性能, 显微组织

Abstract: Two kinds of steels 0.19C-1.52Si-1.53Mn-0.14Al-0.048Nb and 0.19C-1.52Si-1.48Mn-0.15Al were treated by Q＆ P (quenching and partitioning) process. The effect of final quenching on the microstructure and mechanical property of Q＆ P steels was studied. The results showed that the addition of Nb has the effect of fine grain strengthening and precipitation strengthening. The combination of elongation and tensile strength achieves 25190MPa·%. And the final quenching process increases the volume of martensite and greatly improves the tensile strength and yield strength of Q＆ P steels. Meanwhile， this process decreases the total elongation and work hardening index of the steels. The steels without final quenching process have the better mechanical properties with high total elongation but the relatively low strength.

Key words: Q＆ P process, final quenching, mechanical property, microstructure

中图分类号:

TG142.1

张君，丁桦，唐正友，李懋. Nb及二次淬火对Q＆P钢组织性能的影响[J]. 东北大学学报:自然科学版, 2013, 34(1): 66-70.

ZHANG Jun， DING Hua， TANG Zheng-you， LI Mao. Effects of Nb and Final Quenching on Microstructure and Mechanical Property of Q＆P Steels[J]. Journal of Northeastern University:Natural Science, 2013, 34(1): 66-70.

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Nb及二次淬火对Q＆P钢组织性能的影响

Effects of Nb and Final Quenching on Microstructure and Mechanical Property of Q＆P Steels

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