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Microstructure and Hardness of Surface Melting Hardened Zone of Mold Steel, SM45C using Yb:YAG Disk Laser
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  • Journal title : Journal of Welding and Joining
  • Volume 34, Issue 1,  2016, pp.75-81
  • Publisher : The Korean Welding and Joining Society
  • DOI : 10.5781/JWJ.2016.34.1.75
 Title & Authors
Microstructure and Hardness of Surface Melting Hardened Zone of Mold Steel, SM45C using Yb:YAG Disk Laser
Lee, Kwang-Hyeon; Choi, Seong-Won; Yoon, Tae-Jin; Kang, Chung-Yun;
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This study applied laser surface melting process using CW(Continuous wave) Yb:YAG laser and cold-work die steel SM45C and investigated microstructure and hardness. Laser beam speed, power and beam interval are fixed at 70 mm/sec, 2.8 kW and respectively. Depth of Hardening layer(Melting zone) was a minimum of 0.8 mm and a maximum of 1.0 mm that exceeds the limit of minimum depth 0.5 mm applying trimming die. In all weld zone, macrostructure was dendrite structure. At the dendrite boundary, Mn, Al, S and O was segregated and MnS and Al oxide existed. However, this inclusion didn`t observe in the heat-affected zone (HAZ). As a result of interpreting phase transformation of binary diagram, MnS crystallizes from liquid. Also, it estimated that Al oxide forms by reacting with oxygen in the atmosphere. The hardness of the melting zone was from 650 Hv to 660 Hv regardless of the location that higher 60 Hv than the hardness of the HAZ that had maximum 600 Hv. In comparison with the size of microstructure using electron backscatter diffraction(EBSD), the size of microstructure in the melting zone was smaller than HAZ. Because it estimated that cooling rate of laser surface melting process is faster than water quenching.
Laser hardening;Yb:YAG Disc laser;SM45C;Laser surface melting;Trimming die;
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G Telasang, JD Majumdar, G Padmanabham and I Manna, Structure-property correlation in laser surface treated AISI H13 tool steel for improved mechanical properties, Materials Science and Engineering, A, 599 (2014), 255-267 crossref(new window)

Z. Zhang, P. Lin, D. Cong, S. Kong, H. Zhou and L. Ren, The characteristics of treated zone processed by pulsed Nd-YAG laser surface remelting on hot work steel, Optics & Laser Technology, 64 (2014), 227-234 crossref(new window)

C. Wang, H. Zhou, N. Liang, C. Wang, D. Cong, C. Meng and L Ren, Mechanical properties of several laser remelting processed steels with different unit spacings, Applied Surface Science, 313 (2014), 333-340 crossref(new window)

C.T. Kwok, F.T. Cheng and H.C. Man, Microstructure and corrosion behavior of laser surface-melted highspeed steels, Surface & Coatings Technology, 202 (2007), 336-348 crossref(new window)

N. Yasavola, A. Abdollah-zadeh, M. Ganjali and SA Alidokht, Microstructure and mechanical behavior of pulsed laser surface melted AISI D2 cold work tool steel, Applied Surface Science, 265 (2013), 653-662 crossref(new window)

G. Telasang, J. Dutta Majumdar, G. Padmanabham, I. Manna, Wear and corrosion behavior of laser surface engineered AISI H13 hot working tool steel, Surface and Coatings Technology, 261 (2015), 69-78 crossref(new window)

Hong-Seok Choi, Byung-Min Kim and Dae-Cheol Ko, Effect of clearance and inclined angle on sheared edge and tool failure in trimming of DP980 sheet, Journal of Mechanical Science and Technology, 28(6) (2014), 2319-2328 crossref(new window)

J. Dutta Majumdar, R Galun, B.L Mordike, I Manna, Effect of laser surface melting on corrosion and wear resistance of a commercial magnesium alloy, Materials Science and Engineering, A, 361 (2003), 119-129 crossref(new window)

Sae-Kyoo Oh, Il-Dong Park, Tae-Eun Jeon and Won-Suk Lee, Friction Welding of Dissimilar Press Punch Materials and Its Evaluation By AE, Journal of KWJS, 15 (1997), 43-53 (in Korean)

J. Grum and R. Sturm, Influence of laser surface melthardening conditions on residual stresses in thin plates, Surface and Coatings Technology, 100-101 (1998) 455-458 crossref(new window)

H.J. Shin, Y.T. Yoo, D.G. Ahn and K. Im, Laser surface hardening of S45C medium carbon steel using Nd:YAG laser with a continuous wave, Journal of Materials Processing Technology, 187-188 (2007), 467-470 crossref(new window)

A. Kusmoko, R. Dahar, H. J. Li and S. Hadi, A Study Surface Layer and Hardness Produced by Induction Hardened S45C Steel, Applied Mechanics and Materials, 664 (2014) 43-47 crossref(new window)

Kwang-Hyeon Lee, Seong-Won Choi, Jung Gil Yun, Myeong-Hwan Oh, Byung Min Kim and Chung-Yun Kang, Effects of laser power on hardness and microstructure of the surface melting hardened SKD61 hot die steel using Yb:YAG disk laser, Journal of KWJS 33-3 (2015) 54-61 (in Korean)

Kwang-Hyeon Lee, Seong-Won Choi, Jung Gil Yun, Myeong-Hwan Oh, Byung Min Kim, and Chung-Yun Kang, Microstructure and Hardness of Yb:YAG Disc Laser Surface Overlap Melted Cold Die Steel, STD11, Journal of KWJS, 33-5 (2015) 53-60 (in Korean)

M Bonek, LA Dobrzanski, E Hajduczek and A Klimpel, Structure and properties of laser alloyed surface layers on the hot-work tool steel, Journal of Materials Processing Technology, 175 (2006) 45-54 crossref(new window)