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A Method Of Hardening Die Surfaces
Abstract: The present invention discloses a modified process of die manufacturing which substantially improves the wear life of the dies. The process consists of introduction of shot blasting operation after the machining operation and before the nitrocarburising operation. The process increases the case depth of the surface hardened layer thereby increasing the wear life of the hot forging dies. Gaseous Ferritic Nitrocarburising (GFN) process is carried out on die steel material for increasing the surface hardness. Performance of the surface hardening process depends on surface preparation and its treatment. Surface preparation entails modifying roughness and residual stresses on the surface. The shot blasting step of the invented process introduces uniform roughness and compressive residual stresses on the surface, which helps to increase the hardening depth during GFN.
Notices, Deadlines & Correspondence
Patent Information
Applicants
Bharat Forge Limited
Inventors
1. Dr. Babasaheb Neelkanth Kalyani
2. Mr. Jayant Bhaurao Mane
3. Mr. Shreyas Shashank Kirwai
4. Mr. Sachin Sitaram Patil
5. Mr. Mukund Vishnu Mavalankar
Specification
DESC:is attached ,CLAIMS:are attached
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | Drawing [14-08-2015(online)].pdf | 2015-08-14 |
| 2 | Description(Complete) [14-08-2015(online)].pdf | 2015-08-14 |
| 3 | REQUEST FOR CERTIFIED COPY [15-09-2015(online)].pdf | 2015-09-15 |
| 4 | Form 3 [14-09-2016(online)].pdf | 2016-09-14 |
| 5 | Provisional Specification-for IPO.pdf | 2018-08-11 |
| 6 | FORMS 3.pdf | 2018-08-11 |
| 7 | Form 26.pdf | 2018-08-11 |
| 8 | Figures_Provisional Specification_for IPO.pdf | 2018-08-11 |
| 9 | 2630-MUM-2014-Correspondence-020115.pdf | 2018-08-11 |
| 10 | 2630-MUM-2014-Form 1-020115.pdf | 2019-01-02 |
| 11 | 2630-MUM-2014-FER.pdf | 2019-06-03 |
| 12 | 2630-MUM-2014-FORM 3 [14-11-2019(online)].pdf | 2019-11-14 |
| 13 | 2630-MUM-2014-FER_SER_REPLY [14-11-2019(online)].pdf | 2019-11-14 |
| 14 | 2630-MUM-2014-COMPLETE SPECIFICATION [14-11-2019(online)].pdf | 2019-11-14 |
| 15 | 2630-MUM-2014-ABSTRACT [14-11-2019(online)].pdf | 2019-11-14 |
| 16 | 2630-MUM-2014-Response to office action [07-06-2021(online)].pdf | 2021-06-07 |
| 17 | 2630-MUM-2014-US(14)-HearingNotice-(HearingDate-09-02-2023).pdf | 2023-01-09 |
| 18 | 2630-MUM-2014-Correspondence to notify the Controller [05-02-2023(online)].pdf | 2023-02-05 |
| 19 | 2630-MUM-2014-RELEVANT DOCUMENTS [13-02-2023(online)].pdf | 2023-02-13 |
| 20 | 2630-MUM-2014-RELEVANT DOCUMENTS [13-02-2023(online)]-1.pdf | 2023-02-13 |
| 21 | 2630-MUM-2014-PETITION UNDER RULE 137 [13-02-2023(online)].pdf | 2023-02-13 |
| 22 | 2630-MUM-2014-PETITION UNDER RULE 137 [13-02-2023(online)]-1.pdf | 2023-02-13 |
| 23 | 2630-MUM-2014-ENDORSEMENT BY INVENTORS [13-02-2023(online)].pdf | 2023-02-13 |
| 24 | 2630-MUM-2014-Response to office action [16-02-2023(online)].pdf | 2023-02-16 |
| 25 | 2630-MUM-2014-PatentCertificate03-04-2023.pdf | 2023-04-03 |
| 26 | 2630-MUM-2014-IntimationOfGrant03-04-2023.pdf | 2023-04-03 |
| 27 | 2630-MUM-2014-Response to office action [21-04-2023(online)].pdf | 2023-04-21 |
| 28 | 2630-MUM-2014-POA [27-05-2023(online)].pdf | 2023-05-27 |
| 29 | 2630-MUM-2014-FORM 13 [27-05-2023(online)].pdf | 2023-05-27 |
| 30 | 2630-MUM-2014-FORM 4 [05-07-2023(online)].pdf | 2023-07-05 |
Search Strategy
| 1 | 2630-MUM-2014_10-05-2019.pdf |