페라이트계 스테인리스강의 열간압연 시 발생하는 Sticking 기구 연구 (Mechanism Study of Sticking Occurring during Hot Rolling of Ferritic Stainless Steel)

서지정보

· 발행기관 : 대한금속·재료학회
· 수록지 정보 : 대한금속·재료학회지 / 46권 / 11호 / 737 ~ 746페이지
· 저자명 : 하대진, 성효경, 이성학, 이종석, 이용득

초록

Mechanisms of sticking phenomena occurring during hot rolling of a modified STS 430J1L ferritic
stainless steel have been investigated in this study by using a pilot-plant-scale rolling machine. As the rolling
pass proceeds, the Fe-Cr oxide layer formed in a reheating furnace is destroyed, and the destroyed oxides
penetrate into the rolled steel to form a thin oxide layer on the surface region. The sticking does not occur
on the surface region containing oxides, whereas it occurs on the surface region without oxides by the
separation of the rolled steel at high temperatures. This indicates that the resistance to sticking increases
by the increase in the surface hardness when a considerable amount of oxides are formed on the surface
region, and that the sticking can be evaluated by the volume fraction and distribution of oxides formed on
the surface region. The lubrication and the increase of the rolling speed and rolling temperature beneficially
affect to the resistance to sticking because they accelerate the formation of oxides on the steel surface region.
In order to prevent or minimize the sticking, thus, it is suggested to increase the thickness of the oxide layer
formed in the reheating furnace and to homogeneously distribute oxides along the surface region by
controlling the hot-rolling process.

영어초록

Mechanisms of sticking phenomena occurring during hot rolling of a modified STS 430J1L ferritic
stainless steel have been investigated in this study by using a pilot-plant-scale rolling machine. As the rolling
pass proceeds, the Fe-Cr oxide layer formed in a reheating furnace is destroyed, and the destroyed oxides
penetrate into the rolled steel to form a thin oxide layer on the surface region. The sticking does not occur
on the surface region containing oxides, whereas it occurs on the surface region without oxides by the
separation of the rolled steel at high temperatures. This indicates that the resistance to sticking increases
by the increase in the surface hardness when a considerable amount of oxides are formed on the surface
region, and that the sticking can be evaluated by the volume fraction and distribution of oxides formed on
the surface region. The lubrication and the increase of the rolling speed and rolling temperature beneficially
affect to the resistance to sticking because they accelerate the formation of oxides on the steel surface region.
In order to prevent or minimize the sticking, thus, it is suggested to increase the thickness of the oxide layer
formed in the reheating furnace and to homogeneously distribute oxides along the surface region by
controlling the hot-rolling process.

참고자료

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