Effects of Austenitization Heating Rate on Mechanical Properties of ADI
碩士 === 大同工學院 === 材料工程學系 === 84 === In this study, the effects of different austenitization heating rate on mechanical properties of Austempered Ductile Iron (ADI) was investigated. Mass effect of 1*,2*,4* Y-blocks and possible seg...
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| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
1996
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| Online Access: | http://ndltd.ncl.edu.tw/handle/11175102125936770065 |
| Summary: | 碩士 === 大同工學院 === 材料工程學系 === 84 === In this study, the effects of different austenitization heating
rate on mechanical properties of Austempered Ductile Iron
(ADI) was investigated. Mass effect of 1*,2*,4* Y-blocks and
possible segregation were studied as well. High
austenitization heating-rate were accomplished by using
induction furnace while conventional air furnace was also used
for comparison.
The results revealed that the tensile strength and impact
toughness of the as-cast material were improved by both R.
F. induction and conventional atmosphere furnace
austenitizing heat treatment to become ADI. Specimens
treated by conventional atmosphere furnace (900℃/ 1.5
hrs- 300℃/ 3 hrs) showed a tensile strength of 1250-1290 MPa
but the impact energy absorbed was only 18-34 J, while
the specimens treated with R. F. induction (950℃/ 7 min.-
340℃/ 40 min.) showed a little bit lower tensile strength
at 910-980 MPa but the impact energy absorbed was higher in
the range of 42-56 J along with better ductility.Microstructural
analysis were performed to correlate the structural features to
the properties obtained.
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