EP 0011365 A1 19800528 - Agricultural mould-boards and method for manufacturing same.
Title (en)
Agricultural mould-boards and method for manufacturing same.
Title (de)
Pflugstreichbleche und Verfahren zu deren Herstellung.
Title (fr)
Versoirs pour charrue et procédé pour leur fabrication.
Publication
Application
Priority
- GB 7838955 A 19781002
- GB 7911745 A 19790404
Abstract (en)
The invention is an agricultural mouldboard formed from a steel containing sulphur or sulphides into which there has been incorporated sufficient of a rare earth element or elements or at least one other sulphide shape modifying element to form sulphides or substantially globular form. A particularly useful steel has a composition, by weight, substantially as follows: 0.6 to 1.2% carbon: up to 0.35% silicon; up to 0.02% sulphur; up to 0.05% phosphorus; 0.5 to 1.5% manganese; up to 1.0% chromium; up to 0.10% rare earth element or other sulphide shape modifying element. The mouldboard is made by gradually and uniformly heating a blank of the modified steel in a furnace to a temperature whereat it can be formed, forming said blank into the desired mouldboard shape, and quenching the thus formed article.
IPC 1-7
IPC 8 full level
C22C 38/00 (2006.01)
CPC (source: EP)
C22C 38/002 (2013.01)
Citation (search report)
- US 4098622 A 19780704 - CLARKE THEODORE M, et al
- DE 2603618 A1 19761223 - KENEBUC GALT LTD
- DE 2003306 A1 19700730 - TOYODA CHUO KENKYUSHO KK, et al
- DE 2706597 A1 19770818 - HONDA MOTOR CO LTD
- US 3806379 A 19740423 - DARR W
Designated contracting state (EPC)
BE DE FR IT LU NL
DOCDB simple family (publication)
DOCDB simple family (application)
EP 79302060 A 19791001