STICKING PHENOMENON OCCURRING DURING HOT ROLLING OF FERRITIC STAINLESS STEELS
- STICKING PHENOMENON OCCURRING DURING HOT ROLLING OF FERRITIC STAINLESS STEELS
- Son, CY; Kim, CK; Ha, DJ; Lee, S; Lee, JS; Kim, KT; Lee, YD
- Date Issued
- KOREAN INST METALS MATERIALS
- 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 degrees C and 1000 degrees C revealed that the sticking process proceeded with three stages, i.e., nucleation, growth, and saturation, for the both stainless steels, and that STS 4,30J1L 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 degrees C, 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.
- stainless steel; sticking; high speed steel roll; hot rolling
- Article Type
- JOURNAL OF THE KOREAN INSTITUTE OF METALS AND MATERIALS, vol. 45, no. 1, page. 6 - 17, 2007-01
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