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2021 Vol.31, Issue 11 Preview Page
Fabrication of Low Carbon Steel Coated with 18%Cr-2.5%Ni-Fe Powder by Laser Cladding and Its Application on Plastic Injection Mold for Aluminum Diecasting
Cheol-Woo Kim†
,
Hyo-Sang Yoo
,
Kyun-Taek Cho
,
Jae-Yeol Jeon
,
Se-Weon Choi
,
Young-Chan Kim
Korea Institute of Industrial Technology, Buk-gu, Gwangju 61012, Republic of Korea
†Corresponding author E-Mail : cwkim@kitech.re.kr (C.-W. Kim. KITECH)
November 2021. pp. 601-607
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Abstract

Laser cladding a surface treatment process that grants superior characteristics such as toughness, hardness, and corrosion resistance to the surface, and rebuilds cracked molds; as such, it can be a strong tool to prolong service life of mold steel. Furthermore, compared with the other similar coating processes – thermal spray, etc., laser cladding provides superior bonding strength and precision coating on a local area. In this study, surface characteristics are studied after laser cladding of low carbon steel using 18%Cr-2.5%Ni-Fe powder (Rockit404), known for its high hardness and excellent corrosion resistance. A diode laser with wavelength of 900-1070 nm is adopted as laser source under argon atmosphere; electrical power for the laser cladding process is 5, 6, and 10 kW. Fundamental surface characteristics such as crossectional microstructure and hardness profile are observed and measured, and special evaluation, such as a soldering test with molten ALDC12 alloy, is conducted to investigate the corrosion resistance characteristics. As a result of the die-soldering test by immersion of low carbon alloy steel in ALDC12 molten metal, the clad layer's soldering thickness decreases.

Keywords
laser cladding
vickers hardness
microstructure
surface treatment
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 31
  • No :11
  • Pages :601-607
  • Received Date : 2021-08-18
  • Revised Date : 2021-10-21
  • Accepted Date : 2021-10-31
  • DOI :https://doi.org/10.3740/MRSK.2021.31.11.601
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