Laser hardening process for thread surface of non-excavation drill rod joint (Chinese)
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- New search for: WANG WEIXIANG
2020
- Patent / Electronic Resource
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Title:Laser hardening process for thread surface of non-excavation drill rod joint
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Additional title:非开挖钻杆接头螺纹表面激光硬化工艺
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Patent number:CN111468899
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Patent applicant:
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Patent family:
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Contributors:WANG WEIXIANG ( author )
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Publisher:
- New search for: Europäisches Patentamt
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Publication date:2020-07-31
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Type of media:Patent
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Type of material:Electronic Resource
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Language:Chinese
- New search for: B23P / C21D / C23C / E21B
- Further information on International Patent Classification
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Classification:
IPC: B23P Sonstige Metallbearbeitung, OTHER WORKING OF METAL / C21D Veränderung der physikalischen Struktur von Eisenmetallen, MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS / C23C Beschichten metallischer Werkstoffe, COATING METALLIC MATERIAL / E21B EARTH OR ROCK DRILLING, Erd- oder Gesteinsbohren -
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