02168ntm a2200253 a 4500 vtls000073186 KUKTEM 20251114204547.0 130710t2012 my da f m 000 0 eng d THE0005914(Local) 201905141428 aida 201307101024 huda UMP TA479.C37 A35 2012 rs Bc. Nur Adjla Mohamad Hafizin Study on thickness effects of low carbon steel in rapid cooling process / Nur Adjla Mohamad Hafizin Kuantan, Pahang : UMP, 2012 xviii, 89 p. : ill. (some col.) ; 30 cm. + 1 CD-ROM Project paper (Bachelor of Mechanical Engineering (Manufacturing)) -- Universiti Malaysia Pahang - 2012 Bibliography : p. 77-79 Hot 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. Carbon steel Surface roughness 0 0 0 1 20000 20000 2019-09-04 0 TA479.C37 A35 2012 rs Bc. 0000072649 2019-09-04 00:00:00 1 2019-09-04 PSM 0 0 0 1 20000 20000 2019-09-04 0 CD 6852 | TA479.C37 A35 2012 rs Bc. 0000072650 2019-09-04 00:00:00 1 2019-09-04 PSM VIRTUA40 4137 4143 VTLSSORT0080*0200*0400*0900*1000*2450*2600*3000*5020*5040*5200*6500*6501*9992