Fe-Mn-1.6Ni-C水电用钢板轧后直接淬火和回火工艺

doi:10.12068/j.issn.1005-3026.2019.07.009

东北大学学报:自然科学版 ›› 2019, Vol. 40 ›› Issue (7): 956-961.DOI: 10.12068/j.issn.1005-3026.2019.07.009

Fe-Mn-1.6Ni-C水电用钢板轧后直接淬火和回火工艺

陈洁，李长生，李坤，涂兴洋

(东北大学轧制技术及连轧自动化国家重点实验室，辽宁沈阳110819)

收稿日期:2018-07-04 修回日期:2018-07-04 出版日期:2019-07-15 发布日期:2019-07-16
通讯作者: 陈洁
作者简介:陈洁(1990-)，男，浙江永嘉人，东北大学博士研究生; 李长生(1964-)，男，黑龙江七台河人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金-中国宝武钢铁集团有限公司钢铁联合研究基金资助项目(U1660205) .

Direct Quenching After Rolling and Tempering Processes of Fe-Mn-1.6Ni-C Steel Plate for Hydropower Station

CHEN Jie， LI Chang-sheng， LI Kun， TU Xing-yang

State Key Laboratory of Rolling and Automation， Northeastern University， Shenyang 110819， China.

Received:2018-07-04 Revised:2018-07-04 Online:2019-07-15 Published:2019-07-16
Contact: LI Chang-sheng
About author:-
Supported by:
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摘要/Abstract

摘要： 通过Fe-Mn-1.6Ni-C钢板控制轧制、轧后直接淬火和560~710℃回火调质处理实验，研究了轧后直接淬火态和回火态的组织与性能变化.结果表明，轧后直接淬火得到组织细小的板条马氏体，固溶强化作用提高了其抗拉强度.经过回火热处理后，碳化物的析出及其对位错的钉扎作用，降低了钢的抗拉强度，提高了钢的屈服强度.随着回火温度的升高，碳化物聚集长大，铁素体发生回复与再结晶，造成强度下降以及冲击韧性提高.当回火温度高于A_○c1时，粗大的碳化物极易引起裂纹形核，破坏钢的冲击韧性.Fe-Mn-1.6Ni-C钢最优的回火温度为680℃，屈服强度为963MPa，抗拉强度为988MPa，延伸率为20.0%，-60℃冲击功为142J.

关键词: 水电用钢板, Fe-Mn-1.6Ni-C, 轧后直接淬火, 回火温度, 显微组织, 力学性能

Abstract: The microstructure and mechanical properties of Fe-Mn-1.6Ni-C steel plate after direct quenching and tempering were investigated， where the tested steel was processed by controlled rolling， direct quenching and 560~710℃ tempering. The results show that the fine lath-martensite is obtained by direct quenching after rolling and the improved tensile strength of the experimental steel after direct quenching is mainly from solid solution strengthening. After tempering， the tensile strength of the steel decreases and the yield strength increases， which is mainly caused by the carbide precipitation and the pinning effect of the precipitates on the dislocations. Due to the aggregation and growth of carbides and recovery and recrystallization of ferrite， the strength decreases and the impact toughness increases with the increasing temperature of tempering. However， the coarse carbides can be observed in the steel if the temperature of tempering is higher than A_○c1， which facilitate the nucleation of micro-cracks and decrease the impact toughness. An optimum tempering temperature of Fe-Mn-1.6Ni-C steel can be obtained， which is 680℃， associated with the yield strength of 963MPa， the tensile strength of 988MPa， the elongation of 20.0%， and the -60 ℃ impact energy of 142J.

Key words: steel plate for hydropower station, Fe-Mn-1.6Ni-C, direct quenching after rolling, tempering temperature, microstructures, mechanical properties

中图分类号:

TG161

陈洁，李长生，李坤，涂兴洋. Fe-Mn-1.6Ni-C水电用钢板轧后直接淬火和回火工艺[J]. 东北大学学报:自然科学版, 2019, 40(7): 956-961.

CHEN Jie， LI Chang-sheng， LI Kun， TU Xing-yang. Direct Quenching After Rolling and Tempering Processes of Fe-Mn-1.6Ni-C Steel Plate for Hydropower Station[J]. Journal of Northeastern University Natural Science, 2019, 40(7): 956-961.

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Fe-Mn-1.6Ni-C水电用钢板轧后直接淬火和回火工艺

Direct Quenching After Rolling and Tempering Processes of Fe-Mn-1.6Ni-C Steel Plate for Hydropower Station

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