Effect of Rosin and Starch Additives on the Microstructure and Mechanical Properties of Fe-based Alloy Powder Laser Forming Sample

被引：0
|
作者：
Chen W. [1 ]
Qiu C. [1 ]
Yan M. [1 ]
He Y. [1 ]
Zhang J. [1 ]
Qi L. [1 ]
机构：
[1] College of Mechanical Engineering, University of South China, Hengyang
来源：
Cailiao Daobao/Materials Reports | 2019年 / 33卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Double-layered micro-membrane coating; Laser forming; Microstructure; Rosin; Starch;
D O I：
10.11896/cldb.18010137
中图分类号：
学科分类号：
摘要：
There were two types of specimens formed on steel substrate in experiment by using a 5 kW cross-flow CO2 laser. One was the net iron-based alloy powder sample, while the other was a sample of the rosin and starch double-layer micro-membrane coated iron-based alloy powder. The composite, microstructure and mechanical properties of those two types of test specimens were then investigated experimentally. It suggested that the rosin and starch double-layered micro-membrane was gasified and burnt in the laser weld pool. Along with that transient reductive atmosphere formed. This atmosphere then protected the formed powder from reducing loss caused by oxygen oxidation. The rate of Cr, Ni, and Si in the micro-membrane coated powder sample increase by an average of 0.12% compared with that of the net powder sample and the content of C and B rate were also increased by an average of 0.015% compared with that of the net powder specimen. Furthermore, the porosity and slag inclusion of the micro-membrane coated powder sample are reduced which rendered an improvement in the quality of the formed sample. The average Rockwell hardness and average tensile strength of the rosin and starch double-layer micro-film coated powder samples are 56.12HRC and 1 847 MPa, respectively, which are 4.7% and 16.2% higher than uncoated powder samples, respectively. © 2019, Materials Review Magazine. All right reserved.
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页码：1848 / 1852
页数：4
相关论文
共 18 条
  • [1] Xu J.T., Li A., Liu D., Et al., Chinese Journal of Lasers, 43, 3, (2016)
  • [2] Deva A., Jha N.K., Jha B.K., International Journal of Metallurgical Engineering, 1, 1, (2012)
  • [3] Xi M.Z., Liu J.B., Zhao Y., Et al., Chinese Journal of Lasers, 43, 2, (2016)
  • [4] Li S., Zeng X.Y., Hu Q.W., Transactions of the China Welding Institution, 29, 7, (2008)
  • [5] Zhang X.D., Dong S.Y., Wang Z.J., Et al., Transactions of the China Welding Institution, 31, 2, (2010)
  • [6] Deng D.W., Sun J.H., Wang X.L., Et al., Chinese Journal of Rare Metals, 40, 1, (2016)
  • [7] Fu Z.K., Wang W.J., Ding H.H., Et al., Transactions of Materials & Heat Treatment, 36, 8, (2015)
  • [8] Zhang C.H., Liu J., Wu C.L., Et al., Transactions of the China Welding Institution, 36, 1, (2015)
  • [9] Feng H., Li J.F., Sun J., Chinese Journal of Lasers, 41, 8, (2014)
  • [10] Zhang W., Yao J.H., Zhang L.C., Acta Materiae Compositae Sinica, 34, 1, (2017)
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