Study of the influence of heat treatment procedure on the microstructure and mechanical properties of H13 mandrel steel : = Study of the influence of heat treatment procedure on the microstructure and mechanical properties of H13 mandrel steel
In this study,the microstructural evolution of H13 mandrel steel during its manufacturing process and the influence of the preheat treatment procedure and the second-step tempering temperature on its microstructural and mechanical properties were investigated.The experiment results showed that,using an H13 mandrel steel billet in the as-annealed condition produced by Baosteel as a raw material,the preheat treatments of normalization,spheroidization annealing,or normalization plus spheroidization annealing,as described in this paper,had no significant effect on the final mechanical properties after quenching and tempering.H13 mandrel steel met all the mechanical property requirements via quenching and tempering without preheat treatment.In the temperature range from 600 to 680℃,with an increase in the second-step tempering temperature,the strength gradually decreased whereas the plasticity and toughness gradually improved.Using the quenching-plus-first-tempering procedure of1030℃/1 h/oil cooling+600℃/5 h/air cooling,good balance between strength and toughness could be achieved by selecting 650℃as the second-step tempering temperature.The test results also showed that the holding time of the second tempering played a big role in the mechanical properties.When this holding time was extended from 1 to2 h,the hardness of the H13 mandrel steel decreased and the extent of this reduction increased with an increase in the second-step tempering temperature.In the temperature range of 1 030 to 1 090℃,the yield strength,tensile strength,and hardness gradually increased,however,the impact toughness decreased with increases in the quenching temperature..
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2019-12-30 2019 |
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| Erschienen: |
2019-12-30 |
| Enthalten in: |
Zur Gesamtaufnahme - year:2019 |
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| Enthalten in: |
Baosteel technical research - (2019), 04 vom: 30. Dez., Seite 30-38 Original Letters: Enthalten in (DE-576)351479988 (DE-576)351479988 |
| Reihe: |
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| Sprache: |
Chinesisch |
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| Weiterer Titel: |
Study of the influence of heat treatment procedure on the microstructure and mechanical properties of H13 mandrel steel |
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| Beteiligte Personen: |
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| Links: |
oversea.cnki.net [lizenzpflichtig] |
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| Anmerkungen: |
Author info:HU Ping;LU Minghe;Research Institute,Baoshan Iron & Steel Co.,Ltd |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
CAJ646859099 |
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| 246 | 3 | 1 | |a Study of the influence of heat treatment procedure on the microstructure and mechanical properties of H13 mandrel steel |
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| 520 | |a In this study,the microstructural evolution of H13 mandrel steel during its manufacturing process and the influence of the preheat treatment procedure and the second-step tempering temperature on its microstructural and mechanical properties were investigated.The experiment results showed that,using an H13 mandrel steel billet in the as-annealed condition produced by Baosteel as a raw material,the preheat treatments of normalization,spheroidization annealing,or normalization plus spheroidization annealing,as described in this paper,had no significant effect on the final mechanical properties after quenching and tempering.H13 mandrel steel met all the mechanical property requirements via quenching and tempering without preheat treatment.In the temperature range from 600 to 680℃,with an increase in the second-step tempering temperature,the strength gradually decreased whereas the plasticity and toughness gradually improved.Using the quenching-plus-first-tempering procedure of1030℃/1 h/oil cooling+600℃/5 h/air cooling,good balance between strength and toughness could be achieved by selecting 650℃as the second-step tempering temperature.The test results also showed that the holding time of the second tempering played a big role in the mechanical properties.When this holding time was extended from 1 to2 h,the hardness of the H13 mandrel steel decreased and the extent of this reduction increased with an increase in the second-step tempering temperature.In the temperature range of 1 030 to 1 090℃,the yield strength,tensile strength,and hardness gradually increased,however,the impact toughness decreased with increases in the quenching temperature. | ||
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