Microstructure and properties of medium-carbon high strength bainite steel fabricated by laser powder deposition

JIANG Yilin; FANG Jinxiang; YANG Wuhong; YANG Xiuye; ZHAO Geng; DONG Shiyun; HE Peng

doi:10.7510/jgjs.issn.1001-3806.2021.06.006

LASER TECHNOLOGY > 2021 > 45(6): 709-714. > DOI: 10.7510/jgjs.issn.1001-3806.2021.06.006

JIANG Yilin, FANG Jinxiang, YANG Wuhong, YANG Xiuye, ZHAO Geng, DONG Shiyun, HE Peng. Microstructure and properties of medium-carbon high strength bainite steel fabricated by laser powder deposition[J]. LASER TECHNOLOGY, 2021, 45(6): 709-714. DOI: 10.7510/jgjs.issn.1001-3806.2021.06.006

Citation:

PDF (3812 KB)

Microstructure and properties of medium-carbon high strength bainite steel fabricated by laser powder deposition

1.
School of Mechanical Engineering, Guizhou University, Guiyang 550025, China
2.
National Key Laboratory for Remanufacturing, Academy of Army Armored Forces, Beijing 100072, China
3.
State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China

More Information

Received Date: December 14, 2020
Revised Date: December 24, 2020
Published Date: November 24, 2021

Graphical Abstract

Abstract

Abstract

In order to realize the additive preparation and surface repair of high strength bainitic steel parts, amedium-carbon high strength bainite steel was prepared by laser powder deposition and salt bath isothermal treatment with different process parameters. The alloy composition (mass fraction) was Fe-0.0029C-0.0150Si-0.0150Mn-0.0096Cr-0.0120Ni-0.0100Al-0.0050Mo.The microstructure of the steel wascharacterized by scanning electron microscope and X-ray diffraction, and the mechanical properties of steel were tested through tensile testing machine and Vicker's microhardness tester. The effect of isothermal temperature and isothermal time on microstructure and properties of the steel during salt bath isothermal process was analyzed. The best integrated mechanical properties were observed after deposition and salt bath isothermal at 280℃ for 5h, the average microhardness, tensile strength, yield strength, andelongationwas 494.5HV, 1248MPa, 1037MPa, and 14.5%, respectively. The results showe that the microstructure of the samples with different process parameters is composed of lath-like bainite and retained austenite, and the microstructure is uniform without defects such as carbide, segregation, pore and inclusion, but too low isothermal time or too high isothermal temperature would lead to the deterioration of the microstructure. This study provides a reference for the additive and repair of high strength parts.
- laser technique,
- high strength and toughness bainite steel,
- laser powder deposition,
- isothermal process parameters

FullText(HTML)

References (16)

References

[1]	CHEN H Y, WU J Z, ZHAO P H, et al. Study on surface powder adhesion process of 316L stainless steel by laser direct metal deposition[J]. Laser Technology, 2019, 43(5): 34-38(in Chinese). http://www.zhangqiaokeyan.com/academic-journal-cn_laser-technology_thesis/0201272851677.html
[2]	YOU Ch Ch, XIAO H Q, REN L R, et al. Microstructure and pro-perties of laser cladding Ti-Al-N composite coating on TC4 surface[J]. Laser Technology, 2021, 45(5): 585-589(in Chinese).
[3]	YANG X, LIU J, CUI X, et al. Effect of remelting on microstructure and magnetic properties of Fe-Co-based alloys produced by laser additive manufacturing[J]. Journal of Physics and Chemistry of Solids, 2019, 130: 210-216. DOI: 10.1016/j.jpcs.2019.03.001
[4]	WANG C, LI Q, ZHOU X, et al. Contrastive studies between laser repairing and plasma arc repairing on single-crystal Ni-based supera-lloy[J]. Materials, 2019, 12(7): 1172. DOI: 10.3390/ma12071172
[5]	WEN X, CUI X, JIN G, et al. Design and characterization of FeCrCoAlMn 0.5 Mo 0.1 high-entropy alloy coating by ultrasonic a-ssisted laser cladding[J]. Journal of Alloys and Compounds, 2020, 835: 155449. DOI: 10.1016/j.jallcom.2020.155449
[6]	DAVENPORT E S, BAIN E C. Transformation of austenite at constant subcritical temperatures[J]. Metallurgical and Materials Transactions, 1970, B1(12): 3503-3530. http://library.aimehq.org/library/books/AIME%20Technical%20Publications%20–%201930%20-%20A-E/AIME%20Technical%20Publications%20–%201930%20-%20A-E%20-%20037.pdf
[7]	ZHAO J, GUO K, HE Y M, et al. Extremely high strength achievement in medium-C nanobainite steel[J]. ScriptaMaterialia, 2018, 152: 20-23. http://www.onacademic.com/detail/journal_1000040276250010_2a99.html
[8]	WANG X H, KANG J, LI Y J, et al. Characterisation on Al-bearing hot-rolled TRIP steel produced through isothermal bainite transformation[J]. Materials Science and Technology, 2019, 36(2): 1-13. DOI: 10.1080/02670836.2019.1695079?tab=permissions&scroll=top
[9]	HE Q S. The application of carburizing bainite steel in bearings and gears[D]. Qinhuangdao: Yanshan University, 2014: 33-53(in Chinese).
[10]	YI M. Development of 1000MPa low carbon bainitic steel for sucker rod[D]. Shenyang: Northeastern University, 2015: 8-11(in Chin-ese).
[11]	YUAN L, LI Zh G, HUANG J, et al. Microstructure and properties of laser cladded nanostructured bainite coatings[J]. China Surface Engineering, 2011, 24(1): 40-43(in Chinese).
[12]	ZHOU Y F, QING G K, XING X L, et al. Preparation and tribolo-gical properties of carbide-free bainite coatings by laser cladding[J]. China Surface Engineering, 2018, 31(4): 160-168(in Chinese).
[13]	FU Y H, ZHANG H, WANG G, et al. Investigation of mechanical properties for hybrid deposition and micro-rolling of bainite steel[J]. Journal of Materials Processing Technology, 2017, 250: 220-227. DOI: 10.1016/j.jmatprotec.2017.07.023
[14]	ZHOU Y, CHEN S, CHEN X, et al. The evolution of bainite and mechanical properties of direct laser deposition 12CrNi2 alloy steel at different laser power[J]. Materials Science and Engineering, 2019, A742: 150-161. http://www.onacademic.com/detail/journal_1000041591860699_90b5.html
[15]	EBRAHIMNIA M, XIE Y, CHI C. Effect of laser power and deposition environment on the microstructure and properties of direct laser metal-deposited 12CrNi2 steel[J]. Acta Metallurgica Sinica (English Letters), 2020, 33(4): 528-538. DOI: 10.1007/s40195-019-00974-4
[16]	WANG C Y, SHI J, CAO W Q, et al. Characterization of microstructure obtained by quenching and partitioning process in low alloy martensitic steel[J]. Materials Science & Engineering, 2010, A527(15): 3442-3449. http://www.onacademic.com/detail/journal_1000034027079310_e17e.html

Cited By

Get Citation

PDF

XML

Article views (5) PDF downloads (5)

Turn off MathJax

Article Contents

Abstract

References

Microstructure and properties of medium-carbon high strength bainite steel fabricated by laser powder deposition

Abstract

References

Catalog

Links：

Microstructure and properties of medium-carbon high strength bainite steel fabricated by laser powder deposition

Abstract

References

Catalog

Links：

Export File

Citation

Format

Content