440㎫급 자동차용 냉연강판의 기계적 성질에 미치는 BAF 소둔조건 = The Mechanical Properties of Automotive Steel Sheets for 440㎫ Grade on BAF Heat Treatment Conditions

다국어 초록 (Multilingual Abstract)

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℃.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 실험방법
• 3. 실험결과 및 고찰
• 4. 결론
• References