材料导报 2021, Vol. 35 Issue (Z1): 357-361
金属与金属基复合材料
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Hastelloy X激光熔覆工艺及组织性能
徐连勇1,2 , 高雅琳1,2 , 赵雷1,2 , 韩永典1,2 , 荆洪阳1,2
1 天津大学材料科学与工程学院,天津 300072 2 天津市现代连接技术重点实验室,天津 300072
Microstructure and Mechanical Properties of Laser Cladding Process on Hastelloy X
XU Lianyong1,2 , GAO Yalin1,2 , ZHAO Lei1,2 , HAN Yongdian1,2 , JING Hongyang1,2
1 School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China 2 Tianjin Key Laboratory of Advanced Joining Technology, Tianjin 300072, China
摘要 基于激光熔覆的增材制造方法,研究了镍基超级合金Hastelloy X的组织和力学性能。采用光纤激光器对Hastelloy X粉末进行熔覆试验,通过对激光熔覆工艺参数进行优化,制造了宏观表面无缺陷的Hastelloy X试样。结果表明,与传统锻造Hastelloy X方法相比,激光熔覆方法使材料在制造过程中发生再结晶,出现晶粒尺寸较小的细等轴晶粒,提高了材料的显微硬度和抗拉强度,韧性降低。 利用扫描电子显微镜(SEM)对Hastelloy X的拉伸断口进行了分析,研究了Hastelloy X在750 ℃下的高温拉伸断裂机理,为混合型断裂。
关键词:
激光熔覆
Hastelloy X
力学性能
微观组织
Abstract: Based on the additive manufacturing method of laser cladding, microstructures and mechanical properties of the nickel-based superalloy Hastelloy X are studied. The direct energy depositing process uses laser beam to melt powders and to deposit layers of materials for buil-ding components. By optimizing the laser cladding process parameters, a parameter table is finally selected to deposit Hastelloy X without defects at the maximum deposition efficiency. The results show that, compared with as-forged Hastelloy X, the laser cladding process gives rise to recrystallization during continuous deposition, which results in the occurrence of finely equiaxed grains with a smaller grain size and improving of the microhardness and the tensile performance of the the as-deposited specimen, but slightly reduces the plastic deformation of the part. The tensile fracture mechanism of de-posited part at 750 ℃ is ductile-brittle fracture.
Key words:
laser cladding
Hastelloy X
mechanical property
microstructure
发布日期: 2021-07-16
基金资助: 国家自然科学基金资助项目(52075374)
通讯作者:
zhaolei85@tju.edu.cn
作者简介: 徐连勇,天津大学材料科学与工程学院,教授。2007年3月毕业于天津大学材料科学与工程学院,材料加工工程博士学位;同年加入天津大学材料科学与工程学院工作至今工作,主要从事材料先进制造、结构高温完整性评价、结构蠕变/疲劳变形机理和应用研究,在国内外重要期刊发表论文150多篇,申请发明专利24项(美国1项)。赵雷,天津大学材料科学与工程学院,副教授。2012年7月毕业于天津大学材料科学与工程学院,材料加工工程博士学位;于2012年7月至2014年12月在北京航空航天大学做博士后。2014年12月进入天津大学材料科学与工程学院工作至今,主要从事材料先进制造、结构高温完整性评价、结构蠕变/疲劳变形机理和应用研究,在国内外重要期刊发表论文40多篇,申请发明专利20余项。
引用本文:
徐连勇, 高雅琳, 赵雷, 韩永典, 荆洪阳. Hastelloy X激光熔覆工艺及组织性能[J]. 材料导报, 2021, 35(Z1): 357-361.
XU Lianyong, GAO Yalin, ZHAO Lei, HAN Yongdian, JING Hongyang. Microstructure and Mechanical Properties of Laser Cladding Process on Hastelloy X. Materials Reports, 2021, 35(Z1): 357-361.
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http://www.mater-rep.com/CN/Y2021/V35/IZ1/357
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