RU2017132500A - Способ изготовления фосфатируемой детали из листа, содержащего покрытие на основе алюминия и цинковое покрытие - Google Patents

Способ изготовления фосфатируемой детали из листа, содержащего покрытие на основе алюминия и цинковое покрытие Download PDF

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RU2017132500A
RU2017132500A RU2017132500A RU2017132500A RU2017132500A RU 2017132500 A RU2017132500 A RU 2017132500A RU 2017132500 A RU2017132500 A RU 2017132500A RU 2017132500 A RU2017132500 A RU 2017132500A RU 2017132500 A RU2017132500 A RU 2017132500A
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coating
steel sheet
aluminum
zinc coating
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RU2017132500A
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RU2017132500A3 (ru
RU2686164C2 (ru
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Кристиан Аллели
Эрик Жаксон
Даниель ШАЛЕЙ
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Арселормиттал
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    • C22C38/00—Ferrous alloys, e.g. steel alloys
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Claims (59)

1. Сальной лист для упрочнения под прессом, имеющий покрытие на основе алюминия и дополнительно содержащий второе покрытие из цинка, толщина которого меньше или равна 1,1 мкм.
2. Стальной лист по п. 1, в котором толщина цинкового покрытия меньше или равна 1,0 мкм.
3. Стальной лист по п. 2, в котором толщина цинкового покрытия меньше или равна 0,7 мкм.
4. Стальной лист по любому из пп. 1-3, в котором покрытие на основе алюминия содержит до 3% железа и 9-12% кремния, остальное составляет алюминий.
5. Стальной лист по любому из пп. 1-4, в котором стальной лист имеет по меньшей мере на одной стороне покрытие на основе алюминия, толщина которого составляет от 5 мкм до 50 мкм.
6. Стальной лист по любому из пп. 1-5, в котором покрытие на основе алюминия входит напрямую в контакт с цинковым покрытием.
7. Стальной лист по любому из пп. 1-6, в котором произведение толщины покрытия на основе алюминия и толщины цинкового покрытия составляет от 2 до 25.
8. Стальной лист по любому из пп. 1-7, имеющий следующий состав, мас.%:
0,20% ≤ C ≤ 0,25%,
0,15% ≤ Si ≤ 0,35%,
1,10% ≤ Mn ≤ 1,40%,
0% ≤ Cr ≤ 0,30%,
0% ≤ Mo ≤ 0,35%,
0% ≤ P ≤ 0,025%,
0% ≤ S ≤ 0,005%,
0,020% ≤ Ti ≤ 0,060%,
0,020% ≤ Al ≤ 0,060%,
0,002% ≤ B ≤ 0,004%,
остальную часть составляют железо и неизбежные примеси.
9. Стальной лист по любому из пп. 1-7, имеющий следующий состав, мас.%:
0,24% ≤ C ≤ 0,38%,
0,40% ≤ Mn ≤ 3%,
0,10% ≤ Si ≤ 0,70%,
0,015% ≤ Al ≤ 0,070%,
0% ≤ Cr ≤ 2%,
0,25% ≤ Ni ≤ 2%,
0,020% ≤ Ti ≤ 0,10%,
0% ≤ Nb ≤ 0,060%,
0,0005% ≤ B ≤ 0,0040%,
0,003% ≤ N ≤ 0,010%,
0,0001% ≤ S ≤ 0,005%,
0,0001% ≤ P ≤ 0,025%,
при этом подразумевается, что содержание титана и азота удовлетворяет следующему отношению
Ti/N > 3,42,
и что содержание углерода, марганца, хрома и кремния удовлетворяет следующему отношению
Figure 00000001
при этом в состав опционально могут входить один или несколько из следующих элементов
0,05% ≤ Mo ≤ 0,65%,
0,001% ≤ W ≤ 0,30%,
0,0005% ≤ Ca ≤ 0,005%,
остальную часть составляют железо и неизбежные примеси.
10. Способ получения стального листа по любому из пп. 1-9, в котором цинковое покрытие наносят посредством цементации, гальваностегии или путем вакуумного напыления паровой струей со звуковой скоростью.
11. Способ по п. 10, в котором, когда цинковое покрытие наносят посредством цементации или гальваностегии, указанное покрытие наносят непосредственно на покрытие на основе алюминия.
12. Способ по п. 11, в котором цинковое покрытие, наносимое посредством цементации, получают путем погружения или путем орошения.
13. Способ по п. 11, в котором, когда цинковое покрытие наносят вакуумным напылением в паровой струе со звуковой скоростью, между покрытием на основе алюминия и цинковым покрытием наносят тонкую пленку нержавеющей стали.
14. Способ получения упрочненной под прессом детали, имеющей фосфатируемое покрытие, содержащий следующие последовательные этапы:
А) получают стальной лист для упрочнения под прессом по любому из пп. 1-9 или изготавливают посредством способа по любому из пп. 10-13,
В) лист, полученный на этапе А), разрезают для получения листовой заготовки, затем
С) листовую заготовку нагревают до температуры Т1 от 840°С до 950°С для получения полностью аустенитной структуры в стали,
D) затем листовую заготовку помещают в пресс,
E) листовую заготовку подвергают горячей штамповке для получения детали,
F) деталь, полученную на этапе Е), охлаждают для получения мартенситной или мартенситно-бейнитной структуры в стали, содержащей не менее 75% равноосного феррита, мартенсит в количестве, превышающем или равном 5% и меньшем или равном 20%, и бейнит в количестве, меньшем или равном 10%.
15. Способ по п. 14, в котором этап С) осуществляют в течение времени t1 от 3 до 12 минут в инертной атмосфере или в атмосфере, содержащей воздух.
16. Способ по п. 14 или 15, в котором во время этапа Е) производят горячую штамповку при температуре Т2 от 600 до 830°С.
17. Упрочненная деталь, полученная способом по любому из пп. 14-16, содержащая слой ZnO и дополнительно слой кристаллов фосфата на слое ZnO, полученный после дополнительного этапа G) фосфатирования.
18. Деталь по п. 17, в которой укрывистость кристаллов фосфата на поверхности детали превышает или равна 90%.
19. Деталь по п. 18, в которой укрывистость кристаллов фосфата на поверхности детали превышает или равна 99%.
20. Деталь по любому из пп. 17-19, дополнительно содержащая катафорезный слой на слое кристаллов фосфата.
21. Применение упрочненной под прессом детали по любому из пп. 17-20 или детали, изготовленной при помощи способа по любому из пп. 14-16, для изготовления деталей автотранспортных средств.
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