SU1406181A1 - Method of manufacturing bars - Google Patents

Method of manufacturing bars Download PDF

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Publication number
SU1406181A1
SU1406181A1 SU874228486A SU4228486A SU1406181A1 SU 1406181 A1 SU1406181 A1 SU 1406181A1 SU 874228486 A SU874228486 A SU 874228486A SU 4228486 A SU4228486 A SU 4228486A SU 1406181 A1 SU1406181 A1 SU 1406181A1
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SU
USSR - Soviet Union
Prior art keywords
pearlite transformation
mill
cooling
heating
leaving
Prior art date
Application number
SU874228486A
Other languages
Russian (ru)
Inventor
Анатолий Степанович Рязанов
Валентин Владимирович Захаров
Яков Яковлевич Пугачев
Моисей Ильич Кривошеев
Виктор Борисович Сыкалов
Михаил Валерьевич Углов
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Предприятие П/Я А-1125
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Priority to SU874228486A priority Critical patent/SU1406181A1/en
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Publication of SU1406181A1 publication Critical patent/SU1406181A1/en

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Abstract

Изобретение от.носитс  к прокатному производству, а именно к изго- товлению термически обработанного проката из легированных конструкционных и инструментальных сталей высокой прокаливаемости. Цель - снижение твердости. После выхода из стана и после нагрева до температуры выше АС| на 30-50°С прокат охлаждают ниже Ас на 150-350°С, а перлитное превращение осуществл ют при температуре ниже Ас 1 на 30-50 С; после завершени  перлитного превращени  прокат окончательно охлаждают.1 табл.The invention relates to rolling production, namely, to the manufacture of heat-treated rolled products from alloyed structural and tool steels of high hardenability. The goal is to reduce hardness. After leaving the mill and after heating to a temperature above AC | by 30-50 ° C; rolled products are cooled below Ac by 150-350 ° C, and pearlite transformation is carried out at a temperature below Ac 1 by 30-50 ° C; after the pearlite transformation is completed, the car is finally cooled.

Description

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Изобретение относитс  к прокатному производству, а именно к изготовлению термически обработанного проката из легированных конструкционных и инструментальных сталей высокой про- каливаемости.The invention relates to rolling production, namely to the manufacture of heat-treated rolled products from alloyed structural and tool steels of high hardenability.

Целью изобретени   вл етс  снижение твердости.The aim of the invention is to reduce hardness.

Сортовой стан ДУО-200 оснащен дву м  термическими печами. Способ испытывали на прокатке диаметром 60 мм при расположении проката в термических печах в один слой.The DUO-200 section mill is equipped with two thermal furnaces. The method was tested on rolling with a diameter of 60 mm at the location of the rental in heat-treatment furnaces in one layer.

Гор чий прокат после выхода из ст на подстуживали до температуры ниже Ас на ISO-SSO c. Затем прокат подавали в печь № 1, где он нагревалс  до температуры выше Acj на ЗО-ЗО С. После печи № 1 прокат охлаждали до температуры ниже Ас на 350-1ЗО С.After leaving the station, hot rolling was boosted to a temperature below Ac at ISO-SSO c. Then, the rental was fed to furnace No. 1, where it was heated to a temperature above Acj at an SO-ZO C. After furnace No. 1, the rolling was cooled to a temperature below Ac by 350-1OZ C.

После этого прокат загружали в печь № 2, в которой он нагревалс  до температуры ниже Ас на 30-50 0 и выдерживалс  до завершени  перлитного Превращени .After that, the rental was loaded into furnace No. 2, in which it was heated to a temperature below Ac by 30-50 ° C and maintained until the completion of the pearlite Transformation.

На печах обеспечивали заданную (одинаковую дл  всех вариантов) производительность .On the furnaces, the given performance was provided (the same for all variants).

На стане было изготовлено 6 партий проката диаметром 60 мм из сталей 9ХВГ и 7X3.The mill produced 6 batches of rolled steel with a diameter of 60 mm from steel 9HVG and 7X3.

Стали высокой прокаливаемости 9ХВГ и 7X3 имеют близкие критические точки температуры Ас, (около 760°С).Steels of high hardenability of 9KHVG and 7X3 have close critical points of temperature Ac, (about 760 ° С).

Температура проката при подстужи- вании и в печах измер ли с помощью оптических пирометров (спектропиров).The rolling temperature during pressing and in furnaces was measured using optical pyrometers (spectroscopes).

Сравнительные результаты испытаний изготовлени  сортового проката приведены в таблице.Comparative test results for the manufacture of long products are given in the table.

Из таблицы видно, что предложенный способ позвол ет снизить твер- дО дость сталей высокой прокаливаемости.The table shows that the proposed method allows to reduce the hardness of high-hardenability steels.

Claims (1)

Формула изобр-е тени Formula Shadows Способ изготовлени  сортового про-45 ката преимущественно из сталей высокой прокаливаемости, включаюощй гор чую прокатку, охлаждение после выходаA method of manufacturing high-grade pro-45 kata, predominantly of high-hardenability steel, including hot rolling, cooling after из стана ниже Ас,, нагрев Ас + (30 - ), охлаждение ниже Ас, вьщержку до завершени  перлитного превращени  и окончательное охлаждение, о т л и - ч а ю щ и и с   тем, что, с целью снижени  твердости, охлаждение проката после выхода из стана и после на- грева выше Ас, ведут до Ас, - (150 - ), а перлитное превращение осуществл ют при Ас 1 - (ЗО-ЗО с).from the mill below Ac, heating Ac + (30 -), cooling below Ac, overheating until the pearlite transformation is completed and the final cooling, so that it is necessary to cool the rolled product to reduce hardness after leaving the mill and after heating above Ac, lead to Ac, - (150 -), and pearlite transformation is carried out at Ac 1 - (ZO-ZO s).
SU874228486A 1987-01-13 1987-01-13 Method of manufacturing bars SU1406181A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU874228486A SU1406181A1 (en) 1987-01-13 1987-01-13 Method of manufacturing bars

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU874228486A SU1406181A1 (en) 1987-01-13 1987-01-13 Method of manufacturing bars

Publications (1)

Publication Number Publication Date
SU1406181A1 true SU1406181A1 (en) 1988-06-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
SU874228486A SU1406181A1 (en) 1987-01-13 1987-01-13 Method of manufacturing bars

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SU (1) SU1406181A1 (en)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Авторское свидетельство СССР № 815046, кл. С 21 D 1/02, 1977. *

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