02658nam a2200265 a 4500 vtls000040725 KUKTEM 20251114204407.0 090723t2008 my a f m 001 0 eng|d THE0007407(Local) 201905151159 fawwaz 201107132156 VLOAD 200908141650 VLOAD 200908141632 VLOAD 200907231023 ida84 UMP TN672 .C44 2008 rs Bc. Chew, Chun Chi Internal structure change of carbon tool steel after heat treatment / Chew, Chun Chi Internal structure change of carbon tool steel after heat treatment [electronic resource] Kuantan, Pahang : UMP, 2008 55 p. : ill. (some col.) ; 30 cm. + 1 computer disc Project paper (Bachelor of Mechanical Engineering with Manufacturing) -- Universiti Malaysia Pahang - 2008 Carbon steel is normally used in the manufacture of chisels, tools parts where high hardness is required to maintain a sharp cutting edge. But, the most common problems we encountered are the short life of the tool. Hence, it is important to use a suitable medium for quenching process to extend the tool life. The main objective of this project is to analyze the internal structure of carbon steel after quenching process. Eventually, the most suitable medium for quenching carbon steel AISI 1045 will be recommended. A carbon steel rod with a diameter of 1.6cm was cut into the size of 2cm in length. Six specimens in the same dimensions were prepared. Each specimen’s surface was ground by using different grade of abrasive paper. After the grinding process, three out of six specimens were undergoing quenching process for one day in three different types of medium; which is oil, water and coolant. However, another three specimens were quenched for one day. After quenching process, all specimens were grinding again to retain shining surface. Diamond liquid was used to polish the surface and then the surface was etched by 2% nital. The internal structure of water and coolant quenching formed finer pearlite while oil quenching formed coarser pearlite. The structures formed have high hardness value ranged from 20.3 HRC to 47.5 HRC. The results were analyzed by using Rockwell hardness tester. The internal structure of specimen was analysed using microscope image analyser equipment and the results were displayed onto computer screen.-Author- Metals Heat treatment Metals Quenching Carbon steel 0 0 0 1 20000 20000 2019-09-04 0 TN672 .C44 2008 rs Bc. 0000038202 2019-09-04 00:00:00 1 2019-09-04 PSM 0 0 0 1 20000 20000 2019-09-04 0 CD 3454 | TN672 .C44 2008 rs Bc. 0000038203 2019-09-04 00:00:00 1 2019-09-04 PSM VIRTUA40 1276 1282 VTLSSORT0080*0200*0400*0900*1000*2450*2460*2600*3000*5020*5200*6500*6501*6502*9992