Dynamic recrystallization analysis of reduction pretreatment process by multi-phase field method
The reduction pretreatment (RP) process is an effective method to improve billet quality, and the deformation recrystallization plays an important role in the process. Exploring the RP process parameters, a dynamic recrystallization model of GCr15 steel was established by the phase-field method and...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2020-01-01
|
| Series: | Materials Research Express |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2053-1591/abbaf7 |
| _version_ | 1797746983405879296 |
|---|---|
| author | Hongqiang Liu Zhen Ning Wei Yu Zhicheng Cheng Xindong Wang Qingwu Cai |
| author_facet | Hongqiang Liu Zhen Ning Wei Yu Zhicheng Cheng Xindong Wang Qingwu Cai |
| author_sort | Hongqiang Liu |
| collection | DOAJ |
| description | The reduction pretreatment (RP) process is an effective method to improve billet quality, and the deformation recrystallization plays an important role in the process. Exploring the RP process parameters, a dynamic recrystallization model of GCr15 steel was established by the phase-field method and physical simulation. The recrystallization kinetics and flow stress curves during hot compression were simulated by using this mode. The effects of deformation parameters and initial grain size on the dynamic recrystallization were investigated. Moreover, by using the results obtained by Finite element method (FEM), dynamic recrystallization during the RP process was investigated though this model. It was found that increasing the deformation temperature, deformation rate and decreasing the initial grain size can promote the dynamic recrystallization kinetics. Large Zener-Hollomon parameters can enhance recrystallized grain refinement, while the recrystallized grain size was not affected by the initial grain size. During the RP process, when the reduction is insufficient (10%), partial recrystallization occurs in the billet. With the increase of reduction from 10% to 16%, the area of complete recrystallization increases gradually. When the reduction is the same, the recrystallization in the billet center increases with the decrease of casting speed. When the reduction is 10%, partial recrystallization occurs in the billet center at a casting speed of 0.7 m min ^−1 , and fully recrystallization occurs in the billet center with a casting speed of 0.5 m min ^−1 . Thus, when the reduction is difficult to increase further, the recrystallization in the billet center can be improved by decreasing the casting speed. |
| first_indexed | 2024-03-12T15:44:37Z |
| format | Article |
| id | doaj.art-fce007cccbdc4430a677f95d0f078a7f |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:44:37Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-fce007cccbdc4430a677f95d0f078a7f2023-08-09T15:50:04ZengIOP PublishingMaterials Research Express2053-15912020-01-0171010650110.1088/2053-1591/abbaf7Dynamic recrystallization analysis of reduction pretreatment process by multi-phase field methodHongqiang Liu0Zhen Ning1Wei Yu2https://orcid.org/0000-0002-3492-9462Zhicheng Cheng3https://orcid.org/0000-0001-5771-1872Xindong Wang4Qingwu Cai5Collaborative Innovation Centre of Steel Technology, University of Science and Technology Beijing , Beijing 100083, People’s Republic of China; HBIS Group Ltd., Co., Shijiazhuang 050000, People’s Republic of ChinaCollaborative Innovation Centre of Steel Technology, University of Science and Technology Beijing , Beijing 100083, People’s Republic of ChinaCollaborative Innovation Centre of Steel Technology, University of Science and Technology Beijing , Beijing 100083, People’s Republic of ChinaCollaborative Innovation Centre of Steel Technology, University of Science and Technology Beijing , Beijing 100083, People’s Republic of ChinaHBIS Group Ltd., Co., Shijiazhuang 050000, People’s Republic of ChinaCollaborative Innovation Centre of Steel Technology, University of Science and Technology Beijing , Beijing 100083, People’s Republic of ChinaThe reduction pretreatment (RP) process is an effective method to improve billet quality, and the deformation recrystallization plays an important role in the process. Exploring the RP process parameters, a dynamic recrystallization model of GCr15 steel was established by the phase-field method and physical simulation. The recrystallization kinetics and flow stress curves during hot compression were simulated by using this mode. The effects of deformation parameters and initial grain size on the dynamic recrystallization were investigated. Moreover, by using the results obtained by Finite element method (FEM), dynamic recrystallization during the RP process was investigated though this model. It was found that increasing the deformation temperature, deformation rate and decreasing the initial grain size can promote the dynamic recrystallization kinetics. Large Zener-Hollomon parameters can enhance recrystallized grain refinement, while the recrystallized grain size was not affected by the initial grain size. During the RP process, when the reduction is insufficient (10%), partial recrystallization occurs in the billet. With the increase of reduction from 10% to 16%, the area of complete recrystallization increases gradually. When the reduction is the same, the recrystallization in the billet center increases with the decrease of casting speed. When the reduction is 10%, partial recrystallization occurs in the billet center at a casting speed of 0.7 m min ^−1 , and fully recrystallization occurs in the billet center with a casting speed of 0.5 m min ^−1 . Thus, when the reduction is difficult to increase further, the recrystallization in the billet center can be improved by decreasing the casting speed.https://doi.org/10.1088/2053-1591/abbaf7dynamic recrystallizationmulti-phase field modelreduction pretreatmentGCr15 |
| spellingShingle | Hongqiang Liu Zhen Ning Wei Yu Zhicheng Cheng Xindong Wang Qingwu Cai Dynamic recrystallization analysis of reduction pretreatment process by multi-phase field method Materials Research Express dynamic recrystallization multi-phase field model reduction pretreatment GCr15 |
| title | Dynamic recrystallization analysis of reduction pretreatment process by multi-phase field method |
| title_full | Dynamic recrystallization analysis of reduction pretreatment process by multi-phase field method |
| title_fullStr | Dynamic recrystallization analysis of reduction pretreatment process by multi-phase field method |
| title_full_unstemmed | Dynamic recrystallization analysis of reduction pretreatment process by multi-phase field method |
| title_short | Dynamic recrystallization analysis of reduction pretreatment process by multi-phase field method |
| title_sort | dynamic recrystallization analysis of reduction pretreatment process by multi phase field method |
| topic | dynamic recrystallization multi-phase field model reduction pretreatment GCr15 |
| url | https://doi.org/10.1088/2053-1591/abbaf7 |
| work_keys_str_mv | AT hongqiangliu dynamicrecrystallizationanalysisofreductionpretreatmentprocessbymultiphasefieldmethod AT zhenning dynamicrecrystallizationanalysisofreductionpretreatmentprocessbymultiphasefieldmethod AT weiyu dynamicrecrystallizationanalysisofreductionpretreatmentprocessbymultiphasefieldmethod AT zhichengcheng dynamicrecrystallizationanalysisofreductionpretreatmentprocessbymultiphasefieldmethod AT xindongwang dynamicrecrystallizationanalysisofreductionpretreatmentprocessbymultiphasefieldmethod AT qingwucai dynamicrecrystallizationanalysisofreductionpretreatmentprocessbymultiphasefieldmethod |