The document summarizes research on using laser cladding to produce an in-situ TiC-Fe composite coating on mild steel. Key findings include:
1) High quality coatings with complete metallurgical bonding between the clad and substrate were produced without porosity or cracks by optimizing laser processing parameters like power, scan speed, and powder feed rate.
2) The microstructure and TiC morphology within the clad layer could be controlled by varying the processing conditions.
3) Future work is proposed to further optimize the process parameters, coating compositions, and investigate the relationship between microstructure and wear resistance properties.
27. 2 mm/sec Increasing the scan speed Clad Top 4 mm/sec 6 mm/sec 8 mm/sec 12 mm/sec 10 mm/sec Clad Top Clad Top Clad Top Clad Top Clad Top Results and discussion Laser power 900 Powder feed rate 4g/min
30. Fe Ti C C Ti Increasing the temperature TiC Results and discussion
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33. Future work Process control TiC morphology and microstructure Wear behaviour study Future work
34. Process control High quality bonding and clad area Different microstructure and TiC morphology Different scan speed 1 2 3 4 Future work
35. Wear investigation 1 2 3 4 n Wear test machine Investigation of surface, wear modes Future work Comparison of wear behaviour of different TiC morphology Process control
36. Powder composition optimization Now 70%Fe Ti- 45 %at C Future work 70%Fe Ti- 50 % at C Future work 70%Fe Ti- 55 % at C Graphite formation (self lubrication ) Ti+ C = TiC Future work
38. Fe percentage decreasing Ti Fe C 70 60 50% Fe 50%C 55%C Optimize the Ti:C ratio Fe+C+TiC
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40. Time table Future work Activity Winter 2010 Spring 2010 Fall 2010 Winter 2011 Spring 2011 Fall 2011 Winter 2012 Investigation on optimum process parameters Investigation on optimum compositions TiC phase formation and morphology analyses Wear resistance investigation and analysis-Process modification Thesis writing Defence