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(12) Patent Application: | (11) CA 2786421 |
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(54) English Title: | PROCEDE DE DETECTION NON DESTRUCTIF DE BRULURES D'USINAGE D'UN ACIER A TRES HAUTE RESISTANCE, ET NUANCIER D'ETALONNAGE DE BRULURES D'USINAGE DE CET ACIER |
(54) French Title: | NON-DESTRUCTIVE METHOD FOR DETECTING MACHINING BURNS OF A VERY-HIGH-STRENGTH STEEL, AND COLOUR CHART FOR CALIBRATING MACHINING BURNS OF SAID STEEL |
Status: | Deemed Abandoned and Beyond the Period of Reinstatement - Pending Response to Notice of Disregarded Communication |
(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: | LAVERY, DE BILLY, LLP |
(74) Associate agent: | |
(45) Issued: | |
(86) PCT Filing Date: | 2011-01-28 |
(87) Open to Public Inspection: | 2011-08-04 |
Availability of licence: | N/A |
Dedicated to the Public: | N/A |
(25) Language of filing: | French |
Patent Cooperation Treaty (PCT): | Yes |
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(86) PCT Filing Number: | PCT/FR2011/050180 |
(87) International Publication Number: | FR2011050180 |
(85) National Entry: | 2012-07-04 |
(30) Application Priority Data: | ||||||
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The invention relates to a method for efficient, industrialisable detection of machining burns of VHS steel. For said purpose, the machined steel is immersed in an aqueous solution of acids including hydrofluoric acid and nitric acid. In order to define a burn degree, a colour chart for calibrating machining burns of VHS steel detected using the above method is prepared. Said colour chart can consist of studs (P1 to P10) of the examined steel subjected to deliberate damage by excessive resurfacing actions (or other machining modes), then submerged in the acid solution defined above. The resurfacing actions can be simulated by overheated thermal treatment, between the ageing temperature Tv (for example 510ºC for steel) and the solution annealing temperature Ts (950ºC for said steel). The samples are classified according to the grey level thereof resulting from the immersion and corresponding to a predetermined hardness and thus to a predetermined level of damage.
L'invention vise à permettre la détection des brûlures d'usinage des aciers de type THR de façon efficace et industrialisable. Pour ce faire, l'acier usiné est immergé dans une solution aqueuse d'acides comprenant de l'acide fluorhydrique et de l'acide nitrique. Afin de définir un degré de brûlure, un nuancier d'étalonnage de brûlures d'usinage d'aciers THR détectées avec la méthode ci-dessus est préparé. Ce nuancier peut être composé de plots (P1 à P10) de l'acier examiné soumis à des dommages volontaires par des rectifications abusives (ou autres modes d'usinage), puis immergés dans la solution d'acides défini ci-dessus. Les rectifications peuvent être simulées par un traitement thermique en surchauffe, entre la température de vieillissement Tv (par exemple 510 °C pour l'acier) et la température de mise en solution Ts (950 °C pour cet acier). Les échantillons sont classés par leur niveau de gris résultant de l'immersion et correspondant à une dureté déterminée, et donc à un niveau de dommage déterminé.
Note: Claims are shown in the official language in which they were submitted.
Note: Descriptions are shown in the official language in which they were submitted.
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Description | Date |
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Inactive: IPC expired | 2019-01-01 |
Application Not Reinstated by Deadline | 2015-01-28 |
Time Limit for Reversal Expired | 2015-01-28 |
Deemed Abandoned - Failure to Respond to Maintenance Fee Notice | 2014-01-28 |
Inactive: Cover page published | 2012-09-27 |
Inactive: Notice - National entry - No RFE | 2012-08-31 |
Application Received - PCT | 2012-08-31 |
Inactive: First IPC assigned | 2012-08-31 |
Inactive: IPC assigned | 2012-08-31 |
Inactive: IPC assigned | 2012-08-31 |
National Entry Requirements Determined Compliant | 2012-07-04 |
Application Published (Open to Public Inspection) | 2011-08-04 |
Abandonment Date | Reason | Reinstatement Date |
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2014-01-28 |
The last payment was received on 2012-12-20
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
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Fee Type | Anniversary Year | Due Date | Paid Date |
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Basic national fee - standard | 2012-07-04 | ||
MF (application, 2nd anniv.) - standard | 02 | 2013-01-28 | 2012-12-20 |
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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MESSIER-BUGATTI-DOWTY |
Past Owners on Record |
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FABRICE ABERNE |
LAURENT HUET |
OLIVIER MENESES |