Using ABAQUS FEM software,the Elastic-plastic with isotropic hardening model is applied to simulate 3D cylinder slab rolling forming in continuous casting (CC),the change of liquid core before slab solidification comp...Using ABAQUS FEM software,the Elastic-plastic with isotropic hardening model is applied to simulate 3D cylinder slab rolling forming in continuous casting (CC),the change of liquid core before slab solidification completely on soft re- duction process is studied,the analyse result shows the soft reduction technique can change the liquid core size,which is useful to cylinder slab forming in CC.展开更多
A two-dimensional model was applied to simulate the liquid core reduction (LCR) technology of bloom CC using ANSYS software. The deformation characteristics of bloom under different liquid fraction and reducing amount...A two-dimensional model was applied to simulate the liquid core reduction (LCR) technology of bloom CC using ANSYS software. The deformation characteristics of bloom under different liquid fraction and reducing amount are obtained. The results indicate that the main deformation condition of bloom shell is compressive strain, mainly undertaken by the liquid core, which increases with the enhancement of reducing amount. Solidified shell takes minor deformation. The longitudinal section of bloom appears sunken and the narrow side bulges, which grow serious when the liquid fraction increases.展开更多
It is expected that the welding hardfacing of continuous casting rolls has better welding performance and higher wear resistance. A new type of submerged-arc hardfacing flux-cored wire has been developed through nitro...It is expected that the welding hardfacing of continuous casting rolls has better welding performance and higher wear resistance. A new type of submerged-arc hardfacing flux-cored wire has been developed through nitrogen replacing part of carbon and addition of the nitrogen-fixing elements of niobium and titanium. And microstructure, degree of hardness and high-temperature wear resistance of its deposited metal samples were also investigated. It is found that the microstructure is martensite, residual austenite and carbonitride precipitates. As a result, the hardfacing metal with homogeneous distribution of very fine carbonitride particles had high hardness and excellent wear-re- sisting property during high-temperature wear, which could significantly extend the service life of continuous casting rolls.展开更多
基金Funded by Ph.D Researcher Foundation of Wuhan University of Technology(No.471-38300869),China.
文摘Using ABAQUS FEM software,the Elastic-plastic with isotropic hardening model is applied to simulate 3D cylinder slab rolling forming in continuous casting (CC),the change of liquid core before slab solidification completely on soft re- duction process is studied,the analyse result shows the soft reduction technique can change the liquid core size,which is useful to cylinder slab forming in CC.
文摘A two-dimensional model was applied to simulate the liquid core reduction (LCR) technology of bloom CC using ANSYS software. The deformation characteristics of bloom under different liquid fraction and reducing amount are obtained. The results indicate that the main deformation condition of bloom shell is compressive strain, mainly undertaken by the liquid core, which increases with the enhancement of reducing amount. Solidified shell takes minor deformation. The longitudinal section of bloom appears sunken and the narrow side bulges, which grow serious when the liquid fraction increases.
基金Item Sponsored by National Natural Science Foundation of China (51101050)Fundamental Research Funds for Central Universities of China (2009B30214)Natural Science Foundation of Jiangsu Province of China (BK2011257)
文摘It is expected that the welding hardfacing of continuous casting rolls has better welding performance and higher wear resistance. A new type of submerged-arc hardfacing flux-cored wire has been developed through nitrogen replacing part of carbon and addition of the nitrogen-fixing elements of niobium and titanium. And microstructure, degree of hardness and high-temperature wear resistance of its deposited metal samples were also investigated. It is found that the microstructure is martensite, residual austenite and carbonitride precipitates. As a result, the hardfacing metal with homogeneous distribution of very fine carbonitride particles had high hardness and excellent wear-re- sisting property during high-temperature wear, which could significantly extend the service life of continuous casting rolls.
