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440㎫급 자동차용 냉연강판의 기계적 성질에 미치는 BAF 소둔조건
박근웅(Keun Woong Park),문만빈(Man Been Moon),나상묵(Sang Muk Na),남궁성(Sung Nam Koong) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Annealing is used in the steel industry as an important step for heat-treatment. Its processes may be classified into the following two categories: batch processes- a large, stationary mass of steel is subjected to a long heat-treatment cycle by varying the temperature within the furnace that surrounds it; continuous processes-a single thickness of cold reduced sheet or strip is passed through a furnace in a relatively short time. And batch annealing is widely used to produce steel sheets like automobile cold rolled steel sheets and sheets used for the manufacture of automobile parts. We developed a BAF simulator to estimate the effects of BAF conditions on the mechanical properties of 440㎫ grade HSS sheet. Conditions for the batch annealing process consist of various annealing time and temperature. 440㎫ HSS sheets require a yield strength (25~40㎏/㎟), tensile strength (≥45㎏/㎟) and elongation (≥34%). The optimum conditions of BAF 440㎫ grade HSS sheet are 10hr of soaking time and 760℃ of heating temperature at △T 40℃.
35R급 고장력강판의 기계적특성에 미치는 BAF조건의 영향
박근웅(Keun Woong Park),문만빈(Man Been Moon),나상묵(Sang Muk Na),남궁성(SungNam Koong) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Annealing can improve the physical performance of cold rolling steel sheet and increase the added value of products. And batch annealing characterized by a long heating cycle and low heating temperature is widely used to produce sheet steels including automobile cold rolled steels and automobile parts. We developed BAF simulator to estimate the effects of BAF conditions on the mechanical properties of 35R High Strength steel sheet. The conditions in batch annealing process consist of various annealing time and temperature. 35R CR steel sheet is required as yield strength (20~30㎏/㎟), tensile strength(35~40㎏/㎟) and elongation(≥38%). Mechanical properties are more susceptible of the annealing temperature than of the annealing time.
BAF 열처리조건 변화에 따른 심가공용 자동차강판의 기계적 특성
박근웅(Keun Woong Park),문만빈(Man Been Moon),나상묵(Sang Muk Na),남궁성(Sung Nam Koong) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The annealing process can improve the physical performance of cold rolling steel sheets and increase the added value of products. Batch annealing, characterized by a long heating cycle and low heating temperatures, is widely used to produce steel sheets like automobile cold rolled steel sheets and sheets used for the manufacture of automobile parts. We developed a BAF simulator to estimate the effects of BAF conditions on the mechanical properties of deep drawing steel sheet. Conditions for the batch annealing process consist of various annealing time and temperature. DDQ CR steel sheets require a yield strength (≤16.5㎏/㎟). tensile strength (28~33㎏/㎟) and elongation (≥46%). These mechanical properties are effected more by changes in the annealing temperature than in the annealing time.