Development of wear resistant composite surface on mild steel by laser surface alloying with silicon and reactive melting

AbstractDiode laser surface alloying process was used to the in-situ synthesis of TiC-reinforced composite surface layers on the ductile cast iron substrate. The obtained composite surface layers were investigated using optical and scanning electron microscopy, and XRD diffraction.It was found that the morphology and fraction of TiC phase is directly dependent upon both the concentration of titanium in the molten pool and also the solidification rate. With increasing titanium content, the fraction of TiC increases, whereas the fraction of cementite decreases. The TiC phase promotes a heterogeneous nucleation of primary austenite grains, what reduces a tendency of cracking in the alloyed layers.

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Laser Surface Alloying of NiCr-Cr3C2 and C-B-W-Cr Powders on Nodular Cast Iron Rolls

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.79-82.1459 ◽

2009 ◽

Vol 79-82 ◽

pp. 1459-1462 ◽

Cited By ~ 2

Author(s):

Gui Fang Sun ◽

Chang Sheng Liu ◽

Jing Liang ◽

Jun Hua Zhou ◽

Xing Qi Tao

Keyword(s):

Cast Iron ◽

Specific Energy ◽

Nodular Cast Iron ◽

Element Distribution ◽

Laser Surface ◽

Surface Alloying ◽

Wear Resistant ◽

Laser Surface Alloying ◽

Metallurgical Bonding

The laser surface alloying(LSA) technique was firstly used to form wear resistant layers on nodular cast iron rolls with two different powders, A: NiCr-Cr3C2 and B: C-B-W-Cr. The microstructure, element distribution and phases of the layers were investigated. Results indicate that the alloying layers had pores and cracks, as well as a metallurgical bonding with the substrates. For layers with powder A, as the thickness of the pre-layers decreased, the numbers of pores and cracks of the LSA layers decreased but the thicknesses of them were close. Phases were barely influenced by the thickness of the pre-layer, while the content of them were affected. For layers with powder B, as the laser specific energy increased, the numbers of pores and cracks in the LSA layers decreased and the thicknesses of them increased. The microstructure in the layers with different powders was different.

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Laser surface alloying of AISI 1050 mild steel for cavitation erosion resistance using NiCrSiB

International Congress on Applications of Lasers & Electro-Optics ◽

10.2351/1.5059456 ◽

2000 ◽

Author(s):

H. C. Man ◽

C. T. Kwok ◽

F. T. Cheng ◽

J. Ding

Keyword(s):

Mild Steel ◽

Cavitation Erosion ◽

Erosion Resistance ◽

Laser Surface ◽

Surface Alloying ◽

Laser Surface Alloying ◽

Cavitation Erosion Resistance

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Synthesis of iron–tungsten alloy on mild steel by laser surface alloying

Thin Solid Films ◽

10.1016/s0040-6090(97)00563-4 ◽

1998 ◽

Vol 317 (1-2) ◽

pp. 468-470 ◽

Cited By ~ 4

Author(s):

Yoji Isshiki ◽

Kazunari Mizumoto ◽

Mituru Hashimoto

Keyword(s):

Mild Steel ◽

Laser Surface ◽

Tungsten Alloy ◽

Surface Alloying ◽

Laser Surface Alloying

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Fabrication of TiC-Reinforced Surface Layers on Ductile Cast Iron Substrate by Laser Surface Alloying

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.308.76 ◽

2020 ◽

Vol 308 ◽

pp. 76-99 ◽

Cited By ~ 2

Author(s):

Damian Janicki

Keyword(s):

Cast Iron ◽

Ductile Cast Iron ◽

Laser Surface ◽

Surface Alloying ◽

X Ray Diffraction ◽

Surface Layers ◽

Composite Surface ◽

Laser Surface Alloying ◽

Novel Method

This chapter presents a novel method for analysis and optimization of the in-situ formation of TiC-reinforced composite surface layers (TRL) on a ductile cast iron substrate during the laser surface alloying process, combining the experimental approach with the computational thermodynamics. The microstructure of the TRLs has been assessed by light optical microscopy, scanning electron microscopy with energy dispersive spectroscopy and X-ray diffraction. The results of thermodynamic calculations with the Scheil-Gulliver model showed a good agreement with the experimental results, indicating that the actual solidification path for the analyzed Fe-C-Si-Ti alloy systems under the investigated range of laser processing conditions is close to the Scheil-Gulliver assumption.

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