JP4909926B2 - 硬装用肉盛溶接棒および該硬装用肉盛溶接棒を用いて製作された掘削用工具 - Google Patents
硬装用肉盛溶接棒および該硬装用肉盛溶接棒を用いて製作された掘削用工具 Download PDFInfo
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- JP4909926B2 JP4909926B2 JP2008057296A JP2008057296A JP4909926B2 JP 4909926 B2 JP4909926 B2 JP 4909926B2 JP 2008057296 A JP2008057296 A JP 2008057296A JP 2008057296 A JP2008057296 A JP 2008057296A JP 4909926 B2 JP4909926 B2 JP 4909926B2
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- welding
- hard
- cemented carbide
- copper
- welding rod
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- 238000003466 welding Methods 0.000 title claims description 54
- 238000009412 basement excavation Methods 0.000 title claims 2
- 239000002245 particle Substances 0.000 claims description 60
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 34
- 229910052802 copper Inorganic materials 0.000 claims description 33
- 239000010949 copper Substances 0.000 claims description 33
- 238000005552 hardfacing Methods 0.000 claims description 14
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 10
- 238000005553 drilling Methods 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 40
- 229910052742 iron Inorganic materials 0.000 description 20
- 239000012071 phase Substances 0.000 description 6
- 229910000616 Ferromanganese Inorganic materials 0.000 description 5
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 5
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- 239000010941 cobalt Substances 0.000 description 4
- 229910017052 cobalt Inorganic materials 0.000 description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 238000005253 cladding Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005261 decarburization Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N Acetylene Chemical compound C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Landscapes
- Earth Drilling (AREA)
- Powder Metallurgy (AREA)
Description
これを防止するため溶接入熱を大きくして溶け込みを良くすると、超硬粒子の劣化が激しくなる。
本発明の硬装用肉盛溶接棒は軟鋼パイプと該軟鋼パイプ内に充填された超硬合金粒子からなる肉盛溶接材において、前記超硬合金粒子が銅のコーティングを施されている事を特徴としている。
さらに銅は周囲の粒子とくっ付いて大きな塊状となり、この事で超硬合金粒は全体的に均等に加熱される。
しかし銅は鉄と超硬粒とのロウ材の役目を果たし、鉄とは良く濡れるがお互い合金化はしない。
従って超硬合金粒を包んだ銅皮膜を通過して超硬合金の内部にまで鉄が侵入する事は防止される。
その結果、溶接作業性は大きく改善され安定化する。湯流れ、湯の広がり、ブロー発生、等多くの項目について溶接性は改善され、安定した肉盛施工が可能になった。
硬装肉盛層中の超硬合金粒子は本来の特性を維持しつつ均一に分散させることが可能となり、ポアのない良好な肉盛層を確保できると共に、硬化肉盛層の耐摩耗性をさらに向上させることが可能となった。
超硬粒に銅コーティングを行った後、フェロマンガン、フェロシリコンに適量の粉末状タングステンもしくはその炭化物(微粒粉末状が良い結果を得る)を添加すれば、結合層の硬度を高くする事が出来る。
超硬合金粒子は、WC−3.5%Co(コバルト)を用いた。
超硬合金粒子は、WC−3.5%Co(コバルト)を用いた。
実施例1、実施例2で得られた硬装用肉盛溶接棒についての性能を調査した。
図1に本実施例1,2による硬装用肉盛溶接棒を用いて得られた肉盛層の組織写真を示す。図2は従来例による硬装用肉盛溶接棒を用いて得られた肉盛層の組織写真を示す。これらの組織写真は2%ナイタールで腐食後、村上試薬でさらに腐食して得られた肉盛層のものであり、倍率はそれぞれ40倍である。
表1における数値及び図3における縦軸はマイクロビッカース硬度(MHV)を示す。
20mm角の鋼材の端面に硬装溶接施工を行った試験片4を3個、図4に示すように取り付け、レベル調整を行うことにより得られた試験用工具を1m角の岩石上に総圧3トン/cm2(試験片一個につき1トン/cm2)で加圧すると共に水冷式で冷却しながら毎分20mの速度で回転させた。
このようにして行った摩耗試験の結果を表2及び図5に示す。表2における縦軸は摩耗量(単位g)、横軸は加圧回転時間を示す。
2 超硬合金粒の外周部
3 鉄基結合層部
4 試験片
Claims (4)
- 軟鋼パイプと該軟鋼パイプ内に充填された超硬合金粒子からなる肉盛溶接材において、前記超硬合金粒子が銅のコーティングを施されている事を特徴とする硬装用肉盛溶接棒。
- 超硬粒をコーティングした銅は、超硬粒に対して1重量%以下であることを特徴とする請求項1に記載の硬装用肉盛溶接棒。
- 耐摩耗性が要求される部分に請求項1又は2に記載の硬装用肉盛溶接棒を用いて製作された、掘削用工具。
- 耐摩耗性が要求される部分に請求項1又は2に記載の硬装用肉盛溶接棒を用いて製作された、石油掘削用ビット。
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JP2008057296A JP4909926B2 (ja) | 2008-03-07 | 2008-03-07 | 硬装用肉盛溶接棒および該硬装用肉盛溶接棒を用いて製作された掘削用工具 |
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JP2008057296A JP4909926B2 (ja) | 2008-03-07 | 2008-03-07 | 硬装用肉盛溶接棒および該硬装用肉盛溶接棒を用いて製作された掘削用工具 |
Publications (2)
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JP2009214110A JP2009214110A (ja) | 2009-09-24 |
JP4909926B2 true JP4909926B2 (ja) | 2012-04-04 |
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JP2008057296A Active JP4909926B2 (ja) | 2008-03-07 | 2008-03-07 | 硬装用肉盛溶接棒および該硬装用肉盛溶接棒を用いて製作された掘削用工具 |
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Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS501055A (ja) * | 1973-05-09 | 1975-01-08 | ||
JPS56128698A (en) * | 1980-03-14 | 1981-10-08 | Sumitomo Metal Ind Ltd | Composite wire for hard facing padding |
JPH10258390A (ja) * | 1997-03-14 | 1998-09-29 | Hitachi Tool Eng Co Ltd | 硬装用超硬合金及びその製造方法 |
JP4696795B2 (ja) * | 2005-09-06 | 2011-06-08 | 三菱マテリアル株式会社 | 肉盛用溶接材及びこれを用いて硬装した掘削工具並びに摩耗防止用プレート |
CA2644915C (en) * | 2006-03-30 | 2011-02-01 | Komatsu Ltd. | Wear resisting particle and wear resisting structural member |
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