SU735336A1

SU735336A1 - Billet producing method

Info

Publication number: SU735336A1
Application number: SU772494403A
Authority: SU
Inventors: Юлиан Михайлович Чуманов; Сергей Петрович Ефименко; Вячеслав Фуатович Губайдулин; Григорий Митрофанович Шульгин; Анатолий Липович Либерман; Владимир Иванович Листопад; Дмитрий Петрович Евтеев; Вениамин Вениаминович Фульмахт
Original assignee: Донецкий Ордена Трудового Красного Знамени Политехнический Институт
Priority date: 1977-06-28
Filing date: 1977-06-28
Publication date: 1980-05-25

Description

Изобретение относится к металлургии и может быть использовано при разработке технологии непрерывной разливки и последующей прокатки заготовок, служащих полуфабрикатами готового проката. ⁵ The invention relates to metallurgy and can be used in the development of technology for continuous casting and subsequent rolling of billets that serve as prefabricated finished products. ⁵

Известен способ производства заготовок, включающий непрерывную отливку симметричного трехлучевого профиля с основанием луча в зоне его сочленения с другими лучами, равным 0,72-2,3 длины грани луча, а вторым основанием, равным 0,5-1,0 длины грани луча, и последующее отделение лучей друг от друга И. _|5 A known method for the production of preforms, including continuous casting of a symmetric three-beam profile with the base of the beam in the zone of its articulation with other beams, equal to 0.72-2.3 of the length of the face of the beam, and the second base, equal to 0.5-1.0 of the length of the face of the beam, and the subsequent separation of the rays from each other I. _{| 5}

Недостаток известного способа - повышенный расходный коэффициент металла, так как отделение лучей друг от друга известными методами газокислородной резки вызывает потери металла в угар ₂₀и окалину.The disadvantage of this method is the increased expenditure coefficient of the metal, since the separation of the rays from each other by known methods of oxy-fuel cutting causes the loss of metal in waste ₂₀ and scale.

Цель изобретения - снижение расхода металла и улучшение качества поверхности отделяемых лучей.The purpose of the invention is to reduce metal consumption and improve the surface quality of the separated rays.

²²

Цель достигается тем, что лучи профиля отделяют поочередно путем преимущественного воздействия калибром прокатного валка на одну из граней одного луча в направлении, перпендикулярном радиусу луча, и кантовки раската после отделения каждого луча, а после сдвига луча на величину 0,57-0,92 длины грани луча меняют направление сдвига на противоположное.The goal is achieved in that the profile beams are separated in turn by the predominant action of the caliber of the rolling roll on one of the faces of one beam in the direction perpendicular to the radius of the beam, and tilting the roll after each beam is separated, and after the beam is shifted by 0.57-0.92 lengths the edges of the beam change the direction of the shift to the opposite.

Существо способа поясняется чертежами, где на . фиг. 1-12 показано : .' последовательное отделение лучей от трехлучевого профиля..The essence of the method is illustrated by drawings, where on. FIG. 1-12 shown:. ' sequential separation of the rays from the three-beam profile ..

На установке непрерывной р'азливки отливают трехлучевой профиль 1, причем его дргчи 2,3 и 4 не^имеют дефектов осевой зоны.. Ликвационяая зона 5 расположена в, сердцевине трехлучевого профиля 1. После отливки профиль 1 режут на мерные длины, подогревают до температуры прокатки и подают на прокатный стан. В валках прокатного стана в первом пропуске (фиг.2) луч 2 смешаютA three-beam profile 1 is cast on a continuous casting unit, and its two-beam profiles 2,3 and 4 do not have defects of the axial zone .. The liquidation zone 5 is located in the core of the three-beam profile 1. After casting, profile 1 is cut into measured lengths, heated to a temperature rolling and served on a rolling mill. In the rolls of the rolling mill in the first pass (figure 2) beam 2 is mixed

Л относительно сочлененных с ним лучей 3 и 4. Смещение луча 2 осуществляют 1 путем обжатия его по грани (указано стрелкой), то есть лучи 3 и 4 удерживаются, а луч 2 в результате обжатия смешается относительно них.L with respect to the beams 3 and 4 articulated with it, beam 2 is shifted 1 by compressing it along the face (indicated by the arrow), that is, beams 3 and 4 are held, and beam 2 as a result of compression is mixed relative to them.

При дальнейшей прокатке (фиг.З и 4) луч 2 полностью отделяется от лучей 3 и 4 . Более целесообразно, однако, после того, как произведен сдвиг луча 2 на величину 0,57-0,92 длины грани луча, изменить направление сдвига на противоположное, как показано на фиг. 5.With further rolling (FIGS. 3 and 4), beam 2 is completely separated from rays 3 and 4. It is more expedient, however, after the beam 2 is shifted by 0.57-0.92 of the length of the beam face, to change the direction of the shift to the opposite, as shown in FIG. 5.

В этом случае углы лучей получаются округленными, а грань луча, по которой идет отделение, -< более качественной.In this case, the angles of the rays are rounded, and the edge of the beam along which the separation is going is <better.

Так как для разделения лучей наиболее благоприятное, положение, когда грань отделяемого луча параллельна оси валка , то после отделения луча 2 оставщиеся сочленными лучи 3 и 4 кантуют. Кантовка производится вдоль продольной оси раската. Дальнейшее отделение лучей 3 и 4 друг от друга, а также сердцевины от луча 3 аналогично выполненному (фиг. 6-11).Since for the separation of the rays the most favorable position is when the face of the separated beam is parallel to the axis of the roll, then after the separation of beam 2, the remaining articulated rays 3 and 4 turn over. Tilting is made along the longitudinal axis of the roll. Further separation of the rays 3 and 4 from each other, as well as the core from the beam 3 is similar to that performed (Fig. 6-11).

В результате отделения получают три сортовые заготовки 2,3 и 4 (фиг¹.12) и сердцевину. Причем заготовки 2,3 и 4 свободны от дефектов в осевой зоне и могут быть использованы для деталей ответственного назначения.As a result of the separation, three high-quality blanks 2,3 and 4 (Fig. ¹ .12) and a core are obtained. Moreover, the workpieces 2,3 and 4 are free from defects in the axial zone and can be used for critical parts.

П р и м е р. На машине непрерывного литья отливается трехлучевой про-⁴филь из стали ШХ15. Все его лучи равны и сочленены между собой под углом 120° . Лучи профиля в поперечном сечении имеют форму квадрата со стороной 42 мм. В лучах п^г .щля полностью отсутствуют рыхлость и ликвация хрома и углерода. Профиль прокатывается на полу735336 4 непрерывном стане 300, где за 3,пропуска отделяется каждый луч, т.е. после 9 пропусков имеем три заготовки 37x43,6 мм и сердцевину треугольной ₅ формы. В дальнейшем заготовки прокатывают в круг диаметром 12 мм, калибруют и направляют на изготовление шариков для подшипников. Сердцевину отправляют в сталеплавильный цех на 10 переплавку.PRI me R. On the continuous casting machine molded three-beam pro- ⁴ fil steel ShKh15. All its rays are equal and articulated with each other at an angle of 120 °. The cross-sectional beams are square in shape with a side of 42 mm. In the rays of the n ^. G., The friability and segregation of chromium and carbon are completely absent. The profile is rolled on the floor 735336 4 continuous mill 300, where for 3 passes each beam is separated, i.e. after 9 passes, we have three blanks of 37x43.6 mm and a triangular ₅ core. Subsequently, the billets are rolled into a circle with a diameter of 12 mm, calibrated and sent to the manufacture of balls for bearings. The core is sent to the steelmaking workshop for 10 remelting.

Claims

, (54) METHOD OF MANUFACTURING BLANKS The invention relates to metallurgy and can be used in the development of continuous casting technology and subsequent rolling of sealers that serve as iroTOBoro rolled semi-finished products. other rays, equal to 0.72-2.3 lengths of the edge of the beam, and a second base equal to 0.5-1.0 lengths of the edge of the beam, and the subsequent separation of the rays from each other Sh. The disadvantage of the known soba - increased metal consumption ratio as the separation of rays from each other by known methods of oxy-fuel cutting causes metal loss in waste and scale. The purpose of the invention is to reduce the metal consumption and improve the quality of the separable rays of the separated beams. The goal is achieved in that the profile beams are separated alternately by predominantly acting with a sprocket roll on one of the edges of one beam in the direction perpendicular to the beam radius and turning the roll out after separating each beam, and after shifting the beam by O, 57 O, 92, the length of the face of the beam changes the direction of the shift to the opposite, Dry, the method is illustrated in the drawings, where fig. 1-12 shows:. sequential separation of the rays from the three-beam profile,. A three-beam profile 1 is cast on the installation of uninterrupted differentiation, and its Jjy4K 2,3 and 4 have no defects in the axial zone .. The liquid zone 5 is located Bi at the core of the three-beam square) Cutting length 1, heat it up, to the rolling temperature and fed to the rolling mill. In the rolls of the rolling mill in the first pass (FIG. 2), beam 2 is shifted relative to the beams 3 and 4 connected with it. The beam 2 is shifted dry by cutting it along the edge (indicated by the arrow) , fo there are rays 3 and 4 being held, and beam 2 is displaced as a result of compression tnositelno them. Upon further rolling (Figs. 3 and 4), beam 2 is completely separated from beams 3 to 4. It is more expedient, however, after the beam 2 has been shifted by the value 0.57–0.92 of the beam face length, to change the direction of the shift to the opposite, as shown in FIG. 5. In this case, the angles of the rays are rounded, and the edge of the beam, along which the separation proceeds, is of higher quality. Since for separation of the rays the most favorable position is when the face of the separable beam is parallel to the axis of the roll, after separation of beam 2, the remaining rays 3 and 4 are folded and turned over along the longitudinal axis of the roll. A further separation lusjeft 3 and 4 from each other, and then also the core from the beam 3 is similar to that performed (Fig.). As a result of the separation, three billets 2,3 and 4 (Fig. 12) and a core are obtained. blanks 2, 3 and 4 are free from defects in the axial zone and can be used for parts of a responsible purpose. PRI me R. On a continuous casting machine, a three-pronged ShF15 steel beam is cast. All its rays are equal and articulated between themselves at an angle of 120. Profile beams in a transverse section of scientific research institutes have the shape of a square with a side of 42 mm. In the rays m, ll, the looseness and liquation of chromium and carbon are completely absent. Profile1 rolls through the field 7 4 to the continuous mill 300, where each beam is separated by the 3 passes, i.e. after 9 passes, we have three blanks 37x43.6 mm and a triangular core. Subsequently, the blanks are rolled into a circle with a diameter of 12 mm, kakibut and sent to the manufacture of balls for bearings. The core is sent to the steelmaking shop for remelting. Claim 1 Method for the production of blanks, including the continuous casting of a symmetrically three-beam profile, with the base of the beam in the zone of its junction with other rays equal to 0.72-2.3 the length of the edge of the beam and the second base equal to 0.51, 0 the length of the edge of the beam, and separating the beams from each other, characterized in that, in order to reduce the metal consumption, the beams of the profile are separated alternately by the primary effect of the caliber of the rolling roll on one of the edges of one beam in the direction perpendicular to the radius of the beam, and kata after separating each beam.

2. The method according to claim 1, wherein, in order to improve the quality of the surface of the separated rays after shifting the beam by the value 0.570, 92, the length of the edge of the beam changes the direction of the shift to the opposite. Sources of information taken in. attention in the examination 1. USSR author's certificate in application number 2437943/02, cl. In 21. In 1/02, 1976.

“G.

FIG. eight