| EPSRC Reference: |
GR/K61692/01 |
| Title: |
HOT DUCTILITY AND ITS RELATIONSHIP TO THE PROBLEM OF TRANSVERSE CRACKING DURING CONTINUOUS CASTING |
| Principal Investigator: |
Mintz, Professor B |
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| Department: |
Mechanical Engineering and Aeronautics |
| Organisation: |
City, University of London |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
31 March 1996 |
Ends: |
30 March 1999 |
Value (£): |
37,217
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Summary on Grant Application Form |
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Straightening at the high temperature end of the hot ductility trough, does not enirely eliminate problems of transverse and edge cracking in Nb, HSLA steels. The presence of 30-40% ferrite prior to deformation results in excellent ductility and this can be achieved by deforming at the low temperature end, 20-30C below the Ar3.Part of the programme examines how the ductility curves are influenced by the Ar3 temperature which can be raised by lower C and Mn levels and increasing Si and P contents. The influence of these elements on hot ductility will be examined over the temperature range 1000-700C and at a tensile testing strain rate of 3x10-3s-1 as used in the straightening operation. Deformation also has a pronounced influence in raising the Ar3 and encouraging formation of ferrite. The influence of grain size, strain, strain rate and temperature, on the Ar3 will be examined for a plain C-Mn steel deformed in compression. In addition, the influence of cooling rate, Cu and S on the hot ductility of HSLA steels will be examined to help sort out current problems related to thin slab casting. Steels will be tensile tested both after heating to 1330C and casting directly to the test temperature using various cooling rates (200 to 25 Kmin-1). Where appropriate Ar3 temperatures will be obtained and optical examination will be carried out to estimate the form and volume fraction of ferrite present on samples quenched after fracture. Fracture examinations will be carried out on SEM and replica and transmissions work where required.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.city.ac.uk |