Study on the Production of Metal Matrix Composite Layer by Laser Melt Injection Technology

Abstract

In-situ synthesized Al2O3 reinforced metal-ceramic composite coating was fabricated on lowalloyed carbon steel surface by laser cladding. Injection of the ceramic powder into the melted surface can be difficult due to the effect of surface tension and to the lower density of the Al2O3 particles, compared to that of the steel matrix. These difficulties can be avoided by the in-situ synthesis of Al2O3 particles in the liquid steel matrix. In this paper, the results of experiments performed by laser beam will be introduced, together with the interpretation of these results. Experiments proved that the Al2O3 ceramic phase can be created in-situ in the steel matrix.

Classification of laser beam induced surface engineering technologies and in situ synthesis of steel matrix surface nanocomposites

“…[76][77][78][80][81][82][83][85][86][87]91,93,94 A new wire-dosing technique (route A1-B3) has been developed by Buza and colleagues. 101,102 Using this technique, different routes can be realised: A1-B3-C4 101 or A1-B3-C5. 102 This paper will describe the possibilities of the in situ LMI technology to improve a surface of a cheap carbon tool steel substrate.…”

“…101,102 Using this technique, different routes can be realised: A1-B3-C4 101 or A1-B3-C5. 102 This paper will describe the possibilities of the in situ LMI technology to improve a surface of a cheap carbon tool steel substrate. The technology includes the addition of large WCzTi particles into a melt steel pool, and the desired solid carbides (Ti,W)C are precipitated upon cooling and solidification.…”

“…A new wire-dosing technique (route A1–B3) has been developed by Buza and colleagues 101,102. Using this technique, different routes can be realised: A1–B3–C4101 or A1–B3–C5 102…”

In-situ synthesis of a carbide reinforced steel matrix surface nanocomposite by laser melt injection technology and subsequent heat treatment

“…During LMI hard particles with the size range of 10-100 µm are blown by a gas stream into a liquid metallic pool, melted by a fast moving laser beam. The particles are usually carbides [1,[8][9][10][11][12]14,[18][19][20][21][23][24][25][26][27][29][30][31][32][33][34][35][36][38][39][40][41][42][43], borides [3][4][5][6][7], nitrides [2], oxides [13,15]), or even soft Pb droplets [28].…”

“…Laser Melt Injection (LMI) technology has been known since the 1980s [1] and has been used to improve surface characteristics of metallic alloys, such as steels [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17], aluminum [18][19][20][21][22][23][24][25][26][27][28], titanium [27,[29][30][31][32][33][34][35][36][37][38][39], nickel [40][41][42] and magnesium [43]. During LMI hard particles with the size range of 10-100 µm are blown by a gas stream into a liquid metallic pool, melted by a fast moving laser beam.…”