000			02168ntm a2200253 a 4500
001			vtls000073186
003			KUKTEM
005			20251114204547.0
008			130710t2012 my da f m 000 0 eng d
020			_aTHE0005914(Local)
039		9	_a201905141428 _baida _y201307101024 _zhuda
040			_aUMP
090			_aTA479.C37 A35 2012 rs Bc.
100	0		_aNur Adjla Mohamad Hafizin
245	1	0	_aStudy on thickness effects of low carbon steel in rapid cooling process / _cNur Adjla Mohamad Hafizin
260			_aKuantan, Pahang : _bUMP, _c2012
300			_axviii, 89 p. : _bill. (some col.) ; _c30 cm. + _e1 CD-ROM
502			_aProject paper (Bachelor of Mechanical Engineering (Manufacturing)) -- Universiti Malaysia Pahang - 2012
504			_aBibliography : p. 77-79
520	3		_aHot stamping is among the latest technology applied in sheet metal manufacturing. It is a combination of a forming and rapid cooling to produce stronger products with the creation of martensite inside the sheet metal components. To cope with a huge range of sheet metal that suitably used for hot forming process, this research investigates microstructure changes during the rapid cooling process of three different sheet metal thicknesses. The Low Carbon Steel specimens of 2, 4 and 6mm thick were heated in a furnace to austenite region before immediately quenched in water and normalized in air. During the process, cooling rates were measured with acquisition system. The quenched specimens were observed using metallurgical microscope. The results show that water quench produced martensite structures while air quench produced pearlite and ferrite structures. The 2mm specimen of water quench formed a higher percentage of martensite and compactly bonded structure compared to 4mm and 6 mm specimens’ structure. For the air quench, 2mm specimen formed finely dispersed pearlite and ferrite. However, the microstructure of 4mm and 6mm specimens’ shows coarse pearlite and ferrite with lower hardness surface.
650		0	_aCarbon steel
650		0	_aSurface roughness
999			_aVIRTUA40 _c4137 _d4143
999			_aVTLSSORT0080*0200*0400*0900*1000*2450*2600*3000*5020*5040*5200*6500*6501*9992