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A process for manufacturing of agricultural tillage disc with higher hardness and better wear resistance. The process utilizes selective alloy chemistry comprising C 0.26 - 0.33% by wt., Mn 1.00 - 1.20% by wt., Si 0.15 - 0.35% by wt. S upto 0.04 max, P upto 0.04 max and Cr 0.35 - 0.45% by wt. which is water quenched followed by tempering to get the improved tillage disc with higher hardness and wear resistant properties. The process instead of conventional oil quenching utilizes water quenching for development of hardness and mechanical properties. The tillage obtained is also cost effective.
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Notices, Deadlines & Correspondence
Notices, Deadlines & Correspondence
Patent Information
Application #
Filing Date
06 March 2000
Publication Number
Publication Type
Invention Field
Status
Email
Parent Application
Patent Number
Legal Status
Grant Date
2006-06-23
Renewal Date
Applicants
STEEL AUTHORITY OF INDIA LIMITED
DORANDA, RANCHI
Inventors
1. BHAKAT ASIT KUMAR
DORANDA, RANCHI-834002
2. DEVA ANJANA
DORANDA, RANCHI-834002
3. MUKERJEE DEBASIS
DORANDA, RANCHI-834002
4. JHA SUDHAKER
DORANDA, RANCHI-834002
Specification
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 135-cal-2000-granted-specification.pdf | 2011-10-06 |
| 2 | 135-cal-2000-granted-reply to examination report.pdf | 2011-10-06 |
| 3 | 135-cal-2000-granted-letter patent.pdf | 2011-10-06 |
| 4 | 135-cal-2000-granted-form 3.pdf | 2011-10-06 |
| 5 | 135-cal-2000-granted-form 2.pdf | 2011-10-06 |
| 6 | 135-cal-2000-granted-form 18.pdf | 2011-10-06 |
| 7 | 135-cal-2000-granted-form 1.pdf | 2011-10-06 |
| 8 | 135-cal-2000-granted-examination report.pdf | 2011-10-06 |
| 9 | 135-cal-2000-granted-description (complete).pdf | 2011-10-06 |
| 10 | 135-cal-2000-granted-correspondence.pdf | 2011-10-06 |
| 11 | 135-cal-2000-granted-claims.pdf | 2011-10-06 |
| 12 | 135-cal-2000-granted-abstract.pdf | 2011-10-06 |
| 13 | 00135-cal-2000-p.a.pdf | 2011-10-06 |
| 14 | 00135-cal-2000-form-3.pdf | 2011-10-06 |
| 15 | 00135-cal-2000-form-2.pdf | 2011-10-06 |
| 16 | 00135-cal-2000-form-18.pdf | 2011-10-06 |
| 17 | 00135-cal-2000-form-1.pdf | 2011-10-06 |
| 18 | 00135-cal-2000-description(complete).pdf | 2011-10-06 |
| 19 | 00135-cal-2000-correspondence.pdf | 2011-10-06 |
| 20 | 00135-cal-2000-claims.pdf | 2011-10-06 |
| 21 | 00135-cal-2000-abstract.pdf | 2011-10-06 |