JP2023503854A - 炭化タングステン系硬質金属材料 - Google Patents
炭化タングステン系硬質金属材料 Download PDFInfo
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- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 239000007769 metal material Substances 0.000 title claims description 87
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 18
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 17
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 11
- 229910052735 hafnium Inorganic materials 0.000 claims abstract description 10
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 10
- 239000002023 wood Substances 0.000 claims description 16
- 239000013078 crystal Substances 0.000 claims description 12
- 238000005452 bending Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 229910052750 molybdenum Inorganic materials 0.000 abstract description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 47
- 239000011651 chromium Substances 0.000 description 32
- 239000000843 powder Substances 0.000 description 14
- 239000000463 material Substances 0.000 description 12
- 229910052759 nickel Inorganic materials 0.000 description 12
- 239000002245 particle Substances 0.000 description 12
- 239000007858 starting material Substances 0.000 description 12
- 229910052799 carbon Inorganic materials 0.000 description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- 238000000879 optical micrograph Methods 0.000 description 10
- 239000011230 binding agent Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 239000012535 impurity Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229910003178 Mo2C Inorganic materials 0.000 description 5
- 238000004663 powder metallurgy Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 150000001247 metal acetylides Chemical class 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 238000007792 addition Methods 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 229910003470 tongbaite Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000001887 electron backscatter diffraction Methods 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- 238000007545 Vickers hardness test Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
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- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
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Abstract
Description
HV10=2550-100×重量%(Co+Ni)±150
の範囲にある。
KIC=6.8+(1/3)×重量%(Co+Ni)±0.5
の範囲にあるとよく、好ましくは、
KIC=6.8+(1/3)×重量%(Co+Ni)±0.3
の範囲にあるとよい。
BBF=2150+(2500/6)×重量%(Co+Ni)±500
の範囲にあるとよく、好ましくは、
BBF=2150+(2500/6)×重量%(Co+Ni)±300
の範囲にあるとよい。
以下ではまず、炭化タングステン系硬質金属材料の実施形態について、一般的に説明する。
比較例として、上述した粉末冶金方法により、以下の組成:2.25重量%Co;0.75重量%Ni;0.35重量%Cr(出発材料として0.4重量%Cr3C2に相当);0.047重量%のMo(出発材料として0.05重量%Mo2Cに相当)、残部WCおよび不可避的不純物;の炭化タングステン系硬質金属材料を、製造した。したがって、WCの含有量は、約96.55重量%であった。この硬質金属材料の微細組織の光学顕微鏡像を、図6に示す。
上述の粉末冶金製造方法により、以下の組成:2.7重量%Co;0.9重量%Ni;0.45重量%Cr(出発材料として0.52重量%Cr3C2に相当);0.047重量%Mo(出発材料として0.05重量%Mo2Cに相当)、ならびに0.094重量%Ta(出発材料としての0.1重量%TaCに相当)、残部WCおよび不可避的不純物:の炭化タングステン系硬質金属材料を製造した。したがって、WCの含有量は、約95.73重量%であった。Co+Ni含有量は3.6重量%であり、Co/(Co+Ni)比は0.75、Cr/(Co+Ni)比は0.125、Me/(Co+Ni)比は0.026であり、この実施例1では、Me=Taであった。この硬質金属材料の微細組織の光学顕微鏡像を、図7に示す。
炭化タングステン系硬質金属材料を、上述の粉末冶金製造方法により、以下の組成:3.15重量%Co;1.05重量%Ni;0.83重量%Cr(出発材料として0.96重量%Cr3C2に相当);0.132重量%Mo(出発材料として0.14重量%Mo2Cに相当);0.188重量%Ta(出発材料として0.2重量%TaCに相当);残部WCおよび不可避的不純物;で製造した。したがって、WCの割合は、約94.50重量%であった。Co+Ni含有量は4.2重量%であり、Co/(Co+Ni)比は0.75であり、Cr/(Co+Ni)比は0.198であり、Me/(Co+Ni)比は0.045であり、この実施例2でも、Me=Taであった。硬質金属材料の光学顕微鏡像を、図8に示す。
炭化タングステン系硬質金属材料を、上述の粉末冶金製造方法において以下の組成:2.7重量%Co;0.9重量%Ni;0.45重量%Cr(出発材料として0.52重量%Cr3C2に相当);0.094重量%Mo(出発材料として0.1重量%Mo2Cに相当)、ならびに0.177重量%Nb(出発材料として0.2重量%NbCに相当)、残部WCおよび不可避的不純物;で製造した。したがって、WCの含有量は、約95.58重量%であった。また、この実施例3では、Me=Nbである。硬質金属材料の光学顕微鏡像を、図9に示す。
炭化タングステン系硬質金属材料を、上述した粉末冶金製造方法によって、以下の組成:2.7重量%Co;0.9重量%Ni;0.45重量%Cr(出発材料として0.52重量%Cr3C2に相当);0.094重量%Mo(出発材料として0.10重量%Mo2Cに相当)、0.113重量%Ta(出発材料として0.2重量%(Ta,Nb)Cに相当)、ならびに0.071重量%Nb(出発材料として0.2重量%の(Ta,Nb)Cに相当)、残部WCおよび不可避的不純物;で製造した。したがって、WCの含有量は、約95.58重量%であった。Co+Ni含有量は3.6重量%であり、Co/(Co+Ni)比は0.75であり、Cr/(Co+Ni)比は0.125であり、Me/(Co+Ni)率は0.051であり、この実施例4では、Me=Ta+Nbであった。この硬質金属材料の組織の光学顕微鏡像を、図10に示す。
Claims (14)
- 平均結晶粒径が0.1~1.3μmの炭化タングステンを含み、
1.0~5.0重量%の(Co+Ni)(ただし、Co/(Co+Ni)比は、重量%で、0.4≦Co/(Co+Ni)≦0.95である)、
0.1~1.0重量%のCr(ただし、(Co+Ni)に対するCrの比は、重量%で、0.05≦Cr/(Co+Ni)≦0.20である)、
0.01~0.3重量%のMo、
0.02~0.45重量%のMe(ただし、Me=Ta、Nb、Hf、およびTiからなる群、好ましくはTaおよび/またはNbの群から選択される1以上の元素であり、0.01≦Me/(Co+Ni)≦0.13である)、
を含有する、炭化タングステン系硬質金属材料。 - 前記炭化タングステンの平均結晶粒径は、0.1~0.8μm、好ましくは0.2~0.5μmである、請求項1に記載の炭化タングステン系硬質金属材料。
- 0.6≦Co/(Co+Ni)≦0.9である、請求項1または2に記載の炭化タングステン系硬質金属材料。
- 0.05≦Cr/(Co+Ni)≦0.15である、請求項1~3のいずれか1項に記載の炭化タングステン系硬質金属材料。
- Crに対するMoの比は、重量%で、Mo/Cr<0.5、好ましくはMo/Cr<0.4を満たす、請求項1~4のいずれか1項に記載の炭化タングステン系硬質金属材料。
- 0.02≦Me/(Co+Ni)≦0.08である、請求項1~5のいずれか1項に記載の炭化タングステン系硬質金属材料。
- Crに対するMeの比が、重量%で、Me/Cr<0.65を満たす、請求項1~6のいずれか1項に記載の炭化タングステン系硬質金属材料。
- 式:HV10=2550-100×重量%(Co+Ni)±150;
による範囲の硬度HV10を有する、請求項1~7のいずれか1項に記載の炭化タングステン系硬質金属材料。 - KIC=6.8+(1/3)×重量%(Co+Ni)±0.5
の範囲のMPa・m1/2での破壊靭性KICを有する、請求項1~8のいずれか1項に記載の炭化タングステン系硬質金属材料。 - BBF=2150+(2500/6)×重量%(Co+Ni)±500
の範囲のMPaでの曲げ破壊強度BBFを有する、請求項1~9のいずれか1項に記載の炭化タングステン系硬質金属材料。 - 木材加工工具または成形工具のための、硬質金属材料の使用。
- 請求項1~10のいずれか1項に記載の炭化タングステン系硬質金属材料から形成された加工部を有する、木材加工工具。
- 請求項1~10のいずれか1項に記載の炭化タングステン系硬質金属材料から形成された加工部を有する、成形工具。
- 前記成形工具は、冷間成形用の工具であり、特に線材製造用の引抜きダイ、または深絞り成形工具である、請求項13に記載の成形工具。
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PCT/EP2020/078715 WO2021099029A1 (de) | 2019-11-22 | 2020-10-13 | Wolframkarbid-basierter hartmetallwerkstoff |
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JPH08218145A (ja) * | 1995-02-09 | 1996-08-27 | Sumitomo Electric Ind Ltd | 木質系硬質材料を加工する工具のための超硬合金 |
JP2017179474A (ja) * | 2016-03-30 | 2017-10-05 | 三菱マテリアル株式会社 | 非金属系材料を加工するための工具に用いる超硬合金 |
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