proses perlakuan panas adalah suatu pt

1. HEAT TREATMENT
(PERLAKUAN PANAS)
M. RIO RIZKY SAPUTRA, 23415945 (2IC01) Teknik Mesin

2. HEAT-TREATMENT
(PERLAKUAN PANAS)
Proses pemanasan suatu logam yang diikuti
proses pendinginan selama waktu tertentu dan
bila perlu dilanjutkan dengan pemanasan serta
pendinginan ulang.
Dimaksudkan untuk memulihkan sifat semula
yang teganggu karena proses pengerjaan atau
untuk membuat sifat tertentu sesuai kebutuhan
operasional/fungsional dan spesifikasi desain.

4. PROSES PERLAKUAN PANAS
THERMAL TERMO-KIMIA TERMO-MEKANIK
•Karburisasi
•Nitriding
•Karbo-nitriding
•De-Karburisasi
•TMT Temp.Tinggi
•TMT Temp. Rendah
 Annealing
 Artificial aging
 Austenitizing
 Full annealing
 Hardenability
 Jominy end-quench test
 Overaging
 Natural aging
 Precipitation hardening
 Precipitation heat treatment
 Process annealing
 Solution heat treatment
 Spheroidizing
 Stress relief

5. FUNGSI PERLAKUAN PANAS
 PEMULIHAN SIFAT
 PEMBENTUKAN SIFAT TERTENTU
Softening, Hardening, & Materials
Modification

7. Jenis Perlakuan Panas FeC

12. KONDISI MEDIA PENDINGIN
KONDISI Udara Minyak Air Air
Garam
•Diam
•Sirkulasi ringan
•Sirkulasi sedang
•Sirkulasi baik
•Sirkulasi kuat
•Sirk. sangat kuat
0,02
0,05
0,25 – 0,3
0,30 – 0,5
0,35 – 0,4
0,4 – 0,5
0,5 – 0,8
0,8 – 1,1
0,9 – 1,0
1,0 – 1,1
1,2 – 1,3
1,4 –1,5
1,6 – 2,0
4
2
2,0 – 2,2
5

13. tbM/Matek/PP/'04

17. SAE-AISI designations for Steel (the xx in
the last two digits indicate the carbon content in hundredths of a percent)
tbM/Matek/PP/'04
Carbon Steels
Illustration of effect of Carbon content on Steel
Hardness
10xx Plain Carbon
11xx Resulfurized
12xx Resulfurized and rephosphorized
Manganese steels
13xx Mn 1.75
Nickel steels
23xx Ni 3.5
25xx Ni 5.0
Nickel Chromium Steels
31xx Ni 1.25 Cr 0.65-0.80
32xx Ni 1.75 Cr 1.07
33xx Ni 3.50 Cr 1.50-1.57
34xx Ni 3.00 Cr 0.77
Chromium Molybdenum steels
41xx Cr 0.50-0.95 Mo 0.12-0.30
Nickel Chromium Molybdenum steels
43xx Ni 1.82 Cr 0.50-0.80 Mo 0.25
47xx Ni 1.05 Cr 0.45 Mo 0.20 – 0.35
86xx Ni 0.55 Cr 0.50 Mo 0.20
Nickel Molybdenum steels
46xx Ni 0.85-1.82 Mo 0.20
48xx Ni 3.50 Mo 0.25
Chromium steels
50xx Cr 0.27- 0.65
51xx Cr 0.80 – 1.05

18. Numbering systems :
American Iron and Steel Institute (AISI)
Society of Automotive Engineers (SAE)
American Society for Testing and Materials (ASTM)
American Society of Mechanical Engineers (ASME)
American Welding Society (AWS)
American National Standards Institute (ANSI)
Steel Founders Society of America
Aluminum Association
Copper Development Association
U.S. Department of Defense (Military Specifications)
General Accounting Office (Federal Specifications)

19. Transformasi Pendinginan Kontinu (CCT)
Transformasi austenit, didinginkan dengan
laju pendinginan yang berbeda.
Transformasi Isotermal ( IT /TTT )
Transformasi fasa yang dikendalikan oleh
difusi austenit.

20. CCT Diagram

21. TTT Diagram

22. The Principles of Heat Treatment
• Heat treatment consists of Heating-Up and Cooling-Down process.
• Heating up the steel will change the microstructure to Austenite.
• Cooling down the steel at different cooling rates will change the
microstructure from Austenite to different structures
correspondingly.
• Change in Microstructures result in change in mechanical
properties.
• By heat treatment, we can change the mechanical properties of
moulds and machine components to our desired state.
• For example, to harden the mould will increase strength and wear
resistance resulting in longer mould life.
• To anneal a hard steel bar will soften it to a state good for
machining.
• To normalize a steel bar will toughen it to a state good for impact.

23. Carburasing

24. Nitriding

25. Induction