| 摘要 |
The manufacturing method of ripper tips, consisting in that ripper tips made from cast steel are subject to normalising, high tempering, and full-volume thermal toughening with a local tempering of the grip part, characterised in that before the toughening, the ripper tips are subject to a hot selective working that provides relative drafts E from 0.20 to 0.30 for the blade, and from 0.15 to 0.20 for the root.
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