时效温度对890MPa级含铜钢组织与性能的影响

doi:10.12068/j.issn.1005-3026.2020.04.008

东北大学学报:自然科学版 ›› 2020, Vol. 41 ›› Issue (4): 499-504.DOI: 10.12068/j.issn.1005-3026.2020.04.008

时效温度对890MPa级含铜钢组织与性能的影响

阚立烨，叶其斌，王益民，王昭东

(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:2019-05-25 修回日期:2019-05-25 出版日期:2020-04-15 发布日期:2020-04-17
通讯作者: 阚立烨
作者简介:阚立烨(1993-)，男，辽宁绥中人，东北大学博士研究生；王昭东(1968-)，男，安徽怀宁人，东北大学教授，博士生导师.
基金资助:
中央高校基本科研业务费专项资金资助项目(N160712001)；国家重点研发计划项目(2016YFB0300300)；装备预研教育部联合基金资助项目(6141A020222).

Effect of Aging Temperatures on Microstructure and Mechanical Properties of 890MPa Grade Copper-Bearing Steel

KAN Li-ye， YE Qi-bin， WANG Yi-min， WANG Zhao-dong

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

Received:2019-05-25 Revised:2019-05-25 Online:2020-04-15 Published:2020-04-17
Contact: YE Qi-bin
About author:-
Supported by:
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摘要/Abstract

摘要： 根据纳米析出强化机制，设计了一种屈服强度为890MPa的超高强海洋工程用钢——NEU890钢.在相同固溶条件下，研究了时效温度对NEU890钢显微组织、室温拉伸性能、-40℃ Charpy冲击功的影响.用透射电子显微镜分析纳米级析出相分布，并计算出其强度贡献值.结果表明，固溶态试样屈服强度为852MPa，500℃时效屈服强度达到峰值1026MPa，呈现典型时效析出强化特征.NEU890钢的脆性时效温度区间为300~500℃.当时效温度为550~600℃时，NEU890钢的屈服强度为994~910MPa，-40℃冲击功为108~166J，可满足EQ91钢拉伸和冲击性能指标要求.

关键词: 时效温度, 纳米析出强化, 超高强海洋工程用钢, EQ91, 890MPa级

Abstract: According to nano-precipitates strengthening mechanism， an ultra-high strength steel for marine engineering(NEU890) was designed with yield strength of 890MPa. Under the same solid solution conditions， the effects of aging temperature on microstructure， tensile property at room temperature and Charpy impact at -40℃ were studied. The distribution of nano-sized precipitates was analyzed by transmission electron microscopy and the strengthening contribution was estimated. The results showed that the yield strength of the solid solution sample is 852MPa， and the aging yield strength at 500℃ can reach the peak value of 1026MPa， which is achieved by a typical aging precipitation strengthening. The brittle aging temperature range of NEU890 steel is 300~500℃. When the aging temperature is 550~600℃， the yield strength becomes 994~910MPa and the impact energy at -40℃ is 108~166J， which can meet the tensile and impact requirements of EQ91 steel.

Key words: aging temperature, nano-precipitates strengthening, ultra-high strength steel for marine engineering, EQ91, 890MPa grade

中图分类号:

TG142

阚立烨，叶其斌，王益民，王昭东. 时效温度对890MPa级含铜钢组织与性能的影响[J]. 东北大学学报:自然科学版, 2020, 41(4): 499-504.

KAN Li-ye， YE Qi-bin， WANG Yi-min， WANG Zhao-dong. Effect of Aging Temperatures on Microstructure and Mechanical Properties of 890MPa Grade Copper-Bearing Steel[J]. Journal of Northeastern University Natural Science, 2020, 41(4): 499-504.

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时效温度对890MPa级含铜钢组织与性能的影响

Effect of Aging Temperatures on Microstructure and Mechanical Properties of 890MPa Grade Copper-Bearing Steel

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