Abstract:
It is desired to provide an infrared heating method of a steel sheet that can contribute to manufacture a steel sheet with a desirable characteristic distribution, and that can contribute to save labor in a steel sheet forming step and to simplify steel sheet forming facilities. The infrared heating method comprises the steps of: wholly infrared heating a steel sheet uniformly up to a temperature which is A3 point or above; and temperature distribution controlling, wherein, after the wholly infrared heating step, partial lowering of a light intensity of infrared rays irradiated toward the steel sheet is performed to provide a first region having a temperature of A3 point or above and a second region having a temperature less than A1 point in the steel sheet.
Abstract:
The invention discloses a method of reducing iron oxide to recover iron from iron content mixture. The method includes the step of mixing a reductant containing at least one of a silicon carbide or ferro-silicon with iron content mixture and heating it at a temperature ranging from 600-1000º C for reaction to undergo. The iron content mixture is one of an iron ore, iron oxide and gangue material. The addition of reductant during the manufacture of sponge iron, DRI or pig iron or during reduction of iron ore assures advantages such as better yield,, efficient use of resources, thus resulting in increasing productivity and reducing the cost of manufacturing. The method converts and upgrades low grade iron ore to high grade iron ore by dry beneficiation magnetic separation. The method also helps in recovery of iron from slag generated during iron and steel production.
Abstract:
본 발명은 다중 라인레이저 어닐링장치에 관한 것으로, 그 목적은 전체적으로 고르게 분포되는 다수의 라인 레이저 광을 얻고, 국부적으로 어닐링 조건이 다른 모재라 하더라도 한번에 처리가 가능하도록 함으로서 어닐링공정의 생산성을 향상시키는 것이다. 이러한 목적으로 이루어진 본 발명에 따른 다중 라인레이저 어닐링장치는, 적어도 하나 이상의 1차 광원부와; 상기 1차 광원부에서 발생한 레이저 빔을 다수의 선형 레이저로 생산하도록 적어도 하나 이상 구비된 2차 광원부와; 상기 2차 광원부에서 조사되는 다중 레이저에 의해 어닐링될 수 있도록 어닐링모재를 고정하는 베이스 플레이트를 포함한다. 이에 따라, 높은 광효율과 전체적으로 고르게 분포되는 다수의 라인 광을 얻도록 하고, 국부적으로 어닐링 조건이 다른 모재라 하더라도 한번에 처리가 가능하도록 함으로서 어닐링공정의 생산성을 향상시키는 이점이 있다.
Abstract:
본 발명의 소재의 가열방법은 실리콘을 함유하는 탄소강 소재를 가열로에 장입시키는 단계; 소재를 예열시키는 단계; 소재의 온도를 높이는 제1가열단계; 가열로의 온도를 낮춰 소재의 표면과 내부의 온도편차를 줄여주는 제2가열단계; 소재의 온도를 높이는 제3가열단계; 및 소재의 표면과 내부의 온도편차를 줄여주는 균열단계를 포함하며, 가열로 내에서의 소재의 온도가 페이알라이트의 융점 이하로 유지되는 것을 특징으로 한다.
Abstract:
A forging apparatus and method of uniformly heating, rheologically softening, and thermoplastically forming metallic glasses rapidly into a net shape using a rapid capacitor discharge forming (RCDF) tool are provided. The RCDF method utilizes the discharge of electrical energy stored in a capacitor to uniformly and rapidly heat a sample or charge of metallic glass alloy to a predetermined "process temperature" between the glass transition temperature of the amorphous material and the equilibrium melting point of the alloy in a time scale of several milliseconds or less. Once the sample is uniformly heated such that the entire sample block has a sufficiently low process viscosity it may be shaped into high quality amorphous bulk articles via forging in a time frame of less than 1 second.
Abstract:
Die Erfindung betrifft ein Verfahren zum Behandeln wenigstens eines Werkstücks (20) in einem Ofen (10), bei dem das Werkstück (20) in einer Ofenkammer (11) des Ofens (10) von wenigstens zwei Heizeinheiten (15;16) erwärmt wird,die dem jeweiligen Werkstück (20) zugeordnet sind, wobei das Werkstück eine erste Werkstückseite (21) und eine zweite Werkstückseite (22) aufweist, und eine erste Heizeinheit (15) die erste Werkstückseite (21) des Werkstücks(20) erwärmt, und eine zweite Heizeinheit (16) die zweite Werkstückseite (22) des Werkstücks(20) erwärmt. Die Erfindung zeichnet sich dadurch aus, dass jede Heizeinheit (15;16) wenigstens zwei Druckstempel (30;31;32;33;34) mit beheizten Kontaktflächen umfasst, die nebeneinander und mit der gleichen Ausrichtung angeordnet sind, und dass das Werkstück (20) erwärmt wird, indem zwischen der ersten Werkstückseite (21) des Werkstücks (20) und den Kontaktflächen der wenigstens zwei Druckstempel (30;31) der ersten Heizeinheit (15) Kontakt hergestellt wird, und indem zwischen der zweiten Werkstückseite (22) des Werkstücks (20) und den Kontaktflächen der wenigstens zwei Druckstempel (32;33;34) der zweiten Heizeinheit (16) ebenfalls Kontakt hergestellt wird. Die Erfindung betrifft ferner einen Ofen (10) zur Durchführung des Verfahrens, umfassend wenigstens zwei Heizeinheiten (15;16) mit beheizbaren Druckstempeln (30;31;32;33;34).
Abstract:
The invention relates to a workpiece having a laser marking (2) as security feature, wherein the laser marking (2) is visible to the naked eye and an exclusively machine-readable security identification (6) is provided underneath the laser marking (2).