| Title |
Sticking Phenomenon Occurring during Hot Rolling of Ferritic Stainless Steels |
| Authors |
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) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
stainless steel; sticking; high speed steel roll; hot rolling |
| 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. |