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Vol.45, No.1, 6 ~ 18, 2007
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| Title |
| Sticking Phenomenon Occurring during Hot Rolling of Ferritic Stainless Steels |
| 김광태 Kwang Tae Kim , 김창규 Chang Kyu Kim , 이성학 Sung Hak Lee , 이용득 Yong Deuk Lee , 이종석 Jong Seog Lee , 손창영 Chang Young Son , 하대진 Dae Jin Ha |
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| Abstract |
| Sticking phenomenon occurring during hot rolling of two ferritic stainless steels, STS 430J1L and STS 436L, was investigated in this study. A hot rolling simulation test was carried out using a high-temperature wear tester capable of controlling rolling speed, load, and temperature. The simulation test results at 900℃ and 1000℃ revealed that the sticking process proceeded with three stages, i.e., nucleation, growth, and saturation, for the both stainless steels, and that STS 430J1L had a smaller number of sticking nucleation sites than the STS 436L because of higher high-temperature hardness, thereby leading to a smaller amount of the sticking. When the test temperature was 1070℃, the sticking hardly occurred in both stainless steels as Fe-Cr oxide layers were formed on the surface of the rolled materials. These findings suggested that the improvement of high-temperature properties of stainless steels and the appropriate rolling conditions for readily forming oxide layers on the rolled material surface were required in order to prevent or minimize the sticking. |
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| Key Words |
| stainless steel, sticking, high speed steel roll, hot rolling |
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