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(12) Patent Application: | (11) CA 3139633 |
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(54) English Title: | A COLD ROLLED MARTENSITIC STEEL AND A METHOD OF MARTENSITIC STEEL THEREOF |
(54) French Title: | ACIER MARTENSITIQUE LAMINE A FROID ET PROCEDE D'ACIER MARTENSITIQUE S'Y RAPPORTANT |
Status: | Allowed |
(51) International Patent Classification (IPC): |
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(72) Inventors : |
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(73) Owners : |
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(71) Applicants : |
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(74) Agent: | SMART & BIGGAR LP |
(74) Associate agent: | |
(45) Issued: | |
(86) PCT Filing Date: | 2020-06-05 |
(87) Open to Public Inspection: | 2020-12-17 |
Examination requested: | 2021-11-08 |
Availability of licence: | N/A |
(25) Language of filing: | English |
Patent Cooperation Treaty (PCT): | Yes |
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(86) PCT Filing Number: | PCT/IB2020/055319 |
(87) International Publication Number: | WO2020/250098 |
(85) National Entry: | 2021-11-08 |
(30) Application Priority Data: | ||||||
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A cold rolled martensitic steel sheet comprising of the following elements, 0.3 % ? C ? 0.4 %; 0.5 % ? Mn ? 1 %; 0.2% ? Si ? 0.6 %; 0.1% ? Cr ? 1 %; 0.01% ? Al ? 1 %; 0.01% ? Mo ? 0.5%; 0.001% ? Ti ? 0.1%; 0%?S?0.09%; 0% ?P? 0.09%; 0%?N? 0.09%; 0% ? Nb ? 0.1%; 0% ? V? 0.1%; 0% ? Ni ? 1%; 0% ? Cu ? 1%; 0% ? B ? 0.05%; 0.001% ? Ca? 0.01%; 0% ?Sn? 0.1%; 0% ? Pb? 0.1%; 0% ? Sb? 0.1%; the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of steel, by area percentage, at least 95% of martensite, a cumulated amount of ferrite and bainite between 1 % and 5%, and an optional amount of residual austenite between 0% and 2%.
La présente invention concerne une tôle d'acier martensitique laminée à froid comprenant les éléments suivants, 0,3 % ? C ? 0,4 % ; 0,5 % ? Mn ? 1 % ; 0,2 % ? Si ? 0,6 % ; 0,1 % ? Cr ? 1 % ; 0,01 % ? Al ? 1 % ; 0,01 % ? Mo ? 0,5 % ; 0,001 % ? Ti ? 0,1 % ; 0 % ? S ? 0,09 % ; 0 % ? P ? 0,09 % ; 0 % ? N ? 0,09 % ; 0 % ? Nb ? 0,1 % ; 0 % ? V ? 0,1 % ; 0 % ? Ni ? 1 % ; 0 % ? Cu ? 1% ; 0 % ? B ? 0,05 % ; 0,001 % ? Ca ? 0,01 % ; 0 % ? Sn ? 0,1 % ; 0 % ? Pb ? 0,1 % ; 0 % ? Sb ? 0,1 % ; la composition restante étant composée de fer et d'impuretés inévitables provoquées par le traitement, la microstructure dudit acier comprenant, par pourcentage de surface, au moins 95 % de martensite, une quantité cumulée de ferrite et de bainite comprise entre 1 % et 5 %, et une quantité éventuelle d'austénite résiduelle comprise entre 0 % et 2 %.
Note: Claims are shown in the official language in which they were submitted.
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Note: Descriptions are shown in the official language in which they were submitted.
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Title | Date |
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Forecasted Issue Date | Unavailable |
(86) PCT Filing Date | 2020-06-05 |
(87) PCT Publication Date | 2020-12-17 |
(85) National Entry | 2021-11-08 |
Examination Requested | 2021-11-08 |
There is no abandonment history.
Last Payment of $125.00 was received on 2024-05-21
Upcoming maintenance fee amounts
Description | Date | Amount |
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Next Payment if standard fee | 2025-06-05 | $277.00 |
Next Payment if small entity fee | 2025-06-05 | $100.00 |
Note : If the full payment has not been received on or before the date indicated, a further fee may be required which may be one of the following
Patent fees are adjusted on the 1st of January every year. The amounts above are the current amounts if received by December 31 of the current year.
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Fee Type | Anniversary Year | Due Date | Amount Paid | Paid Date |
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Application Fee | 2021-11-08 | $408.00 | 2021-11-08 | |
Request for Examination | 2024-06-05 | $816.00 | 2021-11-08 | |
Maintenance Fee - Application - New Act | 2 | 2022-06-06 | $100.00 | 2022-05-18 |
Maintenance Fee - Application - New Act | 3 | 2023-06-05 | $100.00 | 2023-05-24 |
Maintenance Fee - Application - New Act | 4 | 2024-06-05 | $125.00 | 2024-05-21 |
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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ARCELORMITTAL |
Past Owners on Record |
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None |