RU2015131088A - Способ производства текстурированного листа из электротехнической стали и первично-рекристаллизованный стальной лист для производства текстурированного листа из электротехнической стали - Google Patents

Способ производства текстурированного листа из электротехнической стали и первично-рекристаллизованный стальной лист для производства текстурированного листа из электротехнической стали Download PDF

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RU2015131088A
RU2015131088A RU2015131088A RU2015131088A RU2015131088A RU 2015131088 A RU2015131088 A RU 2015131088A RU 2015131088 A RU2015131088 A RU 2015131088A RU 2015131088 A RU2015131088 A RU 2015131088A RU 2015131088 A RU2015131088 A RU 2015131088A
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Юкихиро СИНГАКИ
Хирой ЯМАГУТИ
Юйко ВАКИСАКА
Хироси Мацуда
Такаси ТЭРАСИМА
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Claims (25)

1. Способ производства текстурированного листа из электротехнической стали, в котором:
стальной сляб подвергают горячей прокатке без повторного отжига или после повторного отжига для получения горячекатаного стального листа; причем состав сляба содержит, в мас. % или ч./млн. по массе, С: 0,08% или менее, Si: от 2,0% до 4,5%, Mn: 0,5% или менее, S: менее 50 ч./млн., Se: менее 50 ч./млн., О: менее 50 ч./млн., sol. Al: менее 100 ч./млн., N: 80 ч./млн. или менее, остальное Fe и случайные примеси, и состав сляба удовлетворяет следующему условию: sol. Al (ч./млн.) - N (ч./млн.) × (26,98/14,00) ≤ 30 ч./млн.;
затем производят отжиг и прокатку горячекатаного листа для получения холоднокатаного листа требуемой толщины;
затем производят азотирование холоднокатаного листа, для которого увеличение содержания азота (ΔN) до, во время и после первичного рекристаллизационного отжига определяют приведенными ниже формулами (1) или (2);
если sol. Al - N × (26,98/14,00)≤0,
то
Figure 00000001
или
если 0<sol. Al - N × (26,98/14,00)≤30,
то
Figure 00000002
,
затем наносят отжиговый сепаратор на холоднокатаный лист; и
холоднокатаный лист подвергают вторичному рекристаллизационному отжигу.
2. Способ производства текстурированного листа из электротехнической стали, в котором:
стальной сляб подвергают горячей прокатке без повторного отжига или после повторного отжига для получения горячекатаного стального листа; причем состав сляба содержит, в мас. % или ч./млн. по массе, С: 0,08% или менее, Si: от 2,0% до 4,5%, Mn: 0,5% или менее, S: менее 50 ч./млн., Se: менее 50 ч./млн., О: менее 50 ч./млн., sol. Al: менее 100 ч./млн., N: 80 ч./млн. или менее, остальное Fe и случайные примеси, и состав сляба удовлетворяет следующему условию: sol. Al (ч./млн.) - N (ч./млн.) × (26,98/14,00)≤30 ч./млн.;
затем производят отжиг и прокатку горячекатаного листа для получения холоднокатаного листа требуемой толщины;
затем производят азотирование холоднокатаного листа, для которого увеличение содержания азота (ΔN) до, во время и после первичного рекристаллизационного отжига определяют приведенными ниже формулами (1) или (2);
если sol. Al - N × (26,98/14,00) ≤ 0,
то
Figure 00000001
или
если 0<sol. Al - N × (26,98/14,00) ≤ 30,
то
Figure 00000002
,
затем наносят отжиговый сепаратор на холоднокатаный лист; и
создают возможность диффузии N в стальную подложку во время или после первичного рекристаллизационного отжига и перед началом вторичной рекристаллизации, с целью обеспечения выделения частиц нитрида кремния размером 100 нм или более, не содержащих Al, для использования в качестве ингибитора нормального роста зерен.
3. Способ производства текстурированного листа из электротехнической стали по п. 1 или 2, отличающийся тем, что состав стального сляба содержит, в мас. % один или несколько из указанных ниже элементов: Ni: от 0,005% до 1,50%, Sn: от 0,01% до 0,50%, Sb: от 0,005% до 0,50%, Cu: от 0,01% до 0,50%, Cr: от 0,01% до 1,50%, Р: от 0,0050% до 0,50%, Мо: от 0,01% до 0,50% и Nb: от 0,0005% до 0,0100%.
4. Первично-рекристаллизованный стальной лист для производства текстурированного листа из электротехнической стали, состав которого содержит, в мас. % или ч./млн. по массе: С: 0,08% или менее, Si: от 2,0% до 4,5% и Mn: 0,5% или менее, S, Se и О: менее 50 ч./млн. каждого, sol. Al: менее 100 ч./млн, N: от 50 ч./млн. или более до 1080 ч./млн. или менее, остальное Fe и случайные примеси.
5. Первично-рекристаллизованный стальной лист для производства текстурированного листа из электротехнической стали по п. 4, отличающийся тем, что состав первично-рекристаллизованного листа содержит, в мас. %, один или несколько из указанных ниже элементов: Ni: от 0,005% до 1,50%, Sn: от 0,01% до 0,50%, Sb: от 0,005% до 0,50%, Cu: от 0,01% до 0,50%, Cr: от 0,01% до 1,50%, Р: от 0,0050% до 0,50%, Мо: от 0,01% до 0,50% и Nb: от 0,0005% до 0,0100%.
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