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| High Temperature Mechanical Properties for the Columnar Zone of Steel 20CrMnTi |
| DONG Zhihua CHEN Dengfu** LONG Mujun ZHANG Xing SHEN Jialong |
| (College of Materials Science and Engineering, Chongqing University, Chongqing 400030) |
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Cite this article:
DONG Zhihua ,CHEN Dengfu ,LONG Mujun ZHANG Xing ,SHEN Jialong. High Temperature Mechanical Properties for the Columnar Zone of Steel 20CrMnTi. Chinese Journal of Materials Research, 2013, 27(3): 273-278.
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Abstract At the temperature range of 650-1050℃, the mechanical properties of steel 20CrMnTi at columnar zone, including the strain vs. stress curve, strength at high temperature, hardening coefficient and hot ductility, have been examined by applying hot tension test performed on Gleeble-1500D. The relations between mechanical property and machined position were investigated. The results show that the tensile stress decreases with increasing the distance, while hardening coefficient increases apparently at low temperature(650℃); the minimum of reduction of area for specimen 1#, 2# and 3# is about 60% at 750℃; the width of embrittlement zone is steady at 150℃when the sample changes from 1# to 3# gradually, while the temperature area moves down by 17℃. From the results of 1#, the surface temperature should be controlled above 825℃during unbending operation.
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Received: 03 April 2013
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| Fund: *Supported by Fundamental Research Funds for the Central Universities of China No. CDJZR12110037. |
| About author: **To whom correspondence should be addressed, Tel: (023)65102467, E-mail: chendfu@cqu.edu.cn. |
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