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Vol.18, No.6, 543 ~ 554, 1980
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| Title |
| Effect of Heat Treatment on mechanical Property and Machinability in Ni - Cr - Mo Steel |
| 이용호Y . H . Lee, 김기주K . J . Kim, 이우엽U . Y . Lee, 신평우P . W . Shin, 홍종휘J . H . Hong |
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| Abstract |
| The general mechanical properties, the influence of heat treatment condition and the initial microstructure on machinability of Ni-Cr-Mo steel has been studied. The results from the study were as follows 1. The influence of an initial microstructure on hardenability was pronounced. The critical diameter of a hardenability increased as the initial microstructure changed from the spheroidized, patented and to normalized. 2. The influence of an initial microstructure on the mechanical properties increased as the quenching temperature increased. 3. The machinability increases as the quenching temperature increased and the tempering temperature decreased. 4. When the quenching temperature was high, the machinability increased as the initial microstructure changed in a sequence from the normalized, spheroidized and to patented one. 5. However, when the quenching temperature was low, the sequence of improving machinability was the same as when quenching temperature was high. |
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