热处理对复合制造AerMet100超高强度钢组织均匀性与拉伸性能的影响

doi:10.13251/j.issn.0254-6051.2022.04.001

金属热处理 ›› 2022, Vol. 47 ›› Issue (4): 1-9.DOI: 10.13251/j.issn.0254-6051.2022.04.001

• 组织与性能 • 下一篇

热处理对复合制造AerMet100超高强度钢组织均匀性与拉伸性能的影响

王玉岱^1,2,3, 刘洋^1,2, 朱言言^1,2,3, 田象军^1,2,3, 程序^1,2,3, 冉先喆^1,2,3, 钱婷婷⁴

1.北京航空航天大学前沿科学技术创新研究院, 北京 100191;
2.北京航空航天大学大型金属构件增材制造国家工程实验室, 北京 100191;
3.北京航空航天大学宁波创新研究院, 浙江宁波 315800;
4.北京煜鼎增材制造研究院有限公司, 北京 100096

收稿日期:2021-11-26 修回日期:2022-01-21 出版日期:2022-04-25 发布日期:2022-05-19
通讯作者: 朱言言,副研究员,E-mail:zhuyy@buaa.edu.cn
作者简介:王玉岱(1984—),男,副研究员,博士,主要研究方向为金属材料增材制造,E-mail:wangyudai@buaa.edu.cn。
基金资助:
国家重点研发计划(2018YFB1106000);国家自然科学基金青年基金(51901010)

Effect of heat treatment on microstructure homogeneity and tensile properties of hybrid fabricated AerMet100 ultra-high strength steel

Wang Yudai^1,2,3, Liu Yang^1,2, Zhu Yanyan^1,2,3, Tian Xiangjun^1,2,3, Cheng Xu^1,2,3, Ran Xianzhe^1,2,3, Qian Tingting⁴

1. Research Institute for Frontier Science, Beihang University, Beijing 100191, China;
2. National Engineering Laboratory of Additive Manufacturing for Large Metallic Components, Beihang University, Beijing 100191, China;
3. Ningbo Innovation Research Institute,Beihang University, Ningbo Zhejiang 315800, China;
4. Beijing Yuding Additive Manufacturing Research Institute Co., Ltd., Beijing 100096, China

Received:2021-11-26 Revised:2022-01-21 Online:2022-04-25 Published:2022-05-19

摘要/Abstract

摘要： 研究了不同热处理工艺下复合制造AerMet100超高强度钢试样的组织均匀性,测试了其室温拉伸性能,并分析了其断裂机制。结果表明,沉积态复合制造AerMet100钢的显微组织很不均匀,包括激光沉积区、锻件区以及锻件热影响区;经正火+高温回火+最终热处理后,激光沉积区的晶粒由柱状晶转变为等轴晶,激光沉积区、锻件区以及锻件热影响区的显微组织基本一致,均为回火马氏体,但激光沉积区的枝晶元素偏析仍然存在;增加1200 ℃均匀化处理后,激光沉积区的元素偏析基本消除,复合制造AerMet100钢试样的显微组织变得非常均匀,室温拉伸性能最优,且与锻件区试样相当,拉伸试样断在了激光沉积区一侧,微观断裂机制为韧性断裂。

关键词: 复合制造, 超高强度钢, 组织, 拉伸性能, 均匀化处理

Abstract: Microstructure homogeneity of the hybrid fabricated AerMet100 steel under different heat treatment processes was studied, room temperature tensile properties of the specimens were tested, and the fracture mechanism was analyzed. The results show that microstructure of the as-deposited hybrid fabricated AerMet100 steel is very inhomogeneous, and the specimen contains laser deposited zone, forged zone, heat affected zone of the forged plate. After standard heat treatment commonly used for forged part, columnar grains transform to equiaxed grains for the laser deposited zone, and microstructure of all the three zones as mentioned above is the similar tempered martensite. However, the element segregation in the laser deposited zone is still observed. After homogeneity heat treatment at 1200 ℃ before heat treatment, microstructure of the hybrid fabricated AerMet100 steel becomes very homogeneous, the element segregation in the laser deposited zone is basically eliminated. the room temperature tensile properties are the best which are comparable with the forged zone, and the corresponding tensile specimen indicates ductile fracture mechanism, of which fracture occurs in the laser deposited zone.

Key words: hybrid fabrication, ultra-high strength steel, microstructure, tensile properties, homogeneity treatment

中图分类号:

TG142.1

王玉岱, 刘洋, 朱言言, 田象军, 程序, 冉先喆, 钱婷婷. 热处理对复合制造AerMet100超高强度钢组织均匀性与拉伸性能的影响[J]. 金属热处理, 2022, 47(4): 1-9.

Wang Yudai, Liu Yang, Zhu Yanyan, Tian Xiangjun, Cheng Xu, Ran Xianzhe, Qian Tingting. Effect of heat treatment on microstructure homogeneity and tensile properties of hybrid fabricated AerMet100 ultra-high strength steel[J]. Heat Treatment of Metals, 2022, 47(4): 1-9.

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热处理对复合制造AerMet100超高强度钢组织均匀性与拉伸性能的影响

Effect of heat treatment on microstructure homogeneity and tensile properties of hybrid fabricated AerMet100 ultra-high strength steel

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