JPWO2016056487A1 - 高温耐酸化性のレアメタルフリー硬質焼結体およびその製造方法 - Google Patents
高温耐酸化性のレアメタルフリー硬質焼結体およびその製造方法 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims description 21
- 230000003647 oxidation Effects 0.000 title abstract description 38
- 238000007254 oxidation reaction Methods 0.000 title abstract description 38
- 239000000843 powder Substances 0.000 claims abstract description 75
- 239000011230 binding agent Substances 0.000 claims abstract description 58
- 239000002245 particle Substances 0.000 claims abstract description 56
- 229910015372 FeAl Inorganic materials 0.000 claims abstract description 52
- UJXVAJQDLVNWPS-UHFFFAOYSA-N [Al].[Al].[Al].[Fe] Chemical compound [Al].[Al].[Al].[Fe] UJXVAJQDLVNWPS-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910021326 iron aluminide Inorganic materials 0.000 claims abstract description 37
- 229910052751 metal Inorganic materials 0.000 claims abstract description 36
- 239000002184 metal Substances 0.000 claims abstract description 35
- 238000002156 mixing Methods 0.000 claims abstract description 32
- 238000005245 sintering Methods 0.000 claims abstract description 25
- 238000010298 pulverizing process Methods 0.000 claims abstract description 24
- 150000002739 metals Chemical class 0.000 claims abstract description 20
- 150000004767 nitrides Chemical class 0.000 claims abstract description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000000737 periodic effect Effects 0.000 claims abstract description 9
- 150000001247 metal acetylides Chemical class 0.000 claims abstract description 8
- 239000006104 solid solution Substances 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 239000011812 mixed powder Substances 0.000 claims description 45
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 28
- 229910052760 oxygen Inorganic materials 0.000 claims description 24
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 22
- 239000001301 oxygen Substances 0.000 claims description 22
- 239000012298 atmosphere Substances 0.000 claims description 14
- 229910052782 aluminium Inorganic materials 0.000 claims description 13
- 238000000227 grinding Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 11
- 239000010936 titanium Substances 0.000 claims description 8
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 239000011651 chromium Substances 0.000 claims description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical group [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical group N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 4
- 239000012300 argon atmosphere Substances 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 229910052758 niobium Inorganic materials 0.000 claims description 4
- 239000010955 niobium Substances 0.000 claims description 4
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052796 boron Inorganic materials 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- -1 FeB Substances 0.000 claims description 2
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 229910052757 nitrogen Chemical group 0.000 claims description 2
- 239000003960 organic solvent Substances 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 229910021328 Fe2Al5 Inorganic materials 0.000 abstract 1
- 229910015370 FeAl2 Inorganic materials 0.000 abstract 1
- 229910015392 FeAl3 Inorganic materials 0.000 abstract 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 27
- 239000000463 material Substances 0.000 description 18
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 17
- 239000000126 substance Substances 0.000 description 14
- 239000000203 mixture Substances 0.000 description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 9
- 238000005452 bending Methods 0.000 description 9
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- 239000011195 cermet Substances 0.000 description 6
- 239000010941 cobalt Substances 0.000 description 6
- 229910017052 cobalt Inorganic materials 0.000 description 6
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 6
- 239000002131 composite material Substances 0.000 description 6
- 238000002441 X-ray diffraction Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000001186 cumulative effect Effects 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
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- 229910052721 tungsten Inorganic materials 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 241001077660 Molo Species 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000007580 dry-mixing Methods 0.000 description 2
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- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 229910000951 Aluminide Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910009043 WC-Co Inorganic materials 0.000 description 1
- OLBVUFHMDRJKTK-UHFFFAOYSA-N [N].[O] Chemical compound [N].[O] OLBVUFHMDRJKTK-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
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- 238000007542 hardness measurement Methods 0.000 description 1
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- 229910052715 tantalum Inorganic materials 0.000 description 1
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- 229910052726 zirconium Inorganic materials 0.000 description 1
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Abstract
Description
4FeAl+3O2→4Fe+2Al2O3 (1)
また、硬質粒子からプリフォームを形成し、FeAlを溶侵する複合材料の製法では、複合材料の緻密化が困難で、複合材料の硬度や抗折力が低くなるという問題があった。
本発明の硬質焼結体は、結合相が8.8〜34.4mol%含有され、残部が硬質相および不可避不純物からなる硬質焼結体であって、結合相が、FeAlを主成分とする鉄アルミナイドと、鉄アルミナイド中に分散した粒径1μm以下のアルミナとを含有し、硬質相が、周期表の4族金属、5族金属、および6族金属の炭化物、窒化物、炭窒化物、およびホウ化物、ならびにこれらの固溶体の中から選ばれた少なくとも一種からなる。
4FeAl2+3O2→4FeAl+2Al2O3 (2)
4Fe2Al5+9O2→8FeAl2+2Al2O3+6O2
→8FeAl+6Al2O3 (3)
4FeAl3+6O2→4FeAl2+2Al2O3+3O2
→4FeAl+4Al2O3 (4)
すなわち、A3およびB2の構成相にTiC、FeAl、およびAl2O3が含まれ、FeAl2が含まれないことがわかった。このことから、本発明の硬質焼結体の製造方法により、A3において、FeAl2からFeAlおよびAl2O3が生成されたことが示された。
硬質焼結体100gに含まれる酸素の物質量であるMolOは、
MolO=4.06/AtmO〔mol〕
である。
MolAl2O3=1/3×(4.06/AtmO)〔mol〕
である。
硬質焼結体100g中のTiCの質量
=95.94×0.892×AtmTiC
/(0.892×AtmTiC+0.108×AtmFeAl2)〔g〕
である。
MolTiC
=95.94×0.892
/(0.892×AtmTiC+0.108×AtmFeAl2)〔mol〕
である。
MolFeAl
=95.94×0.108
/(0.892×AtmTiC+0.108×AtmFeAl2)〔mol〕
である。
硬質焼結体のTiCのモル分率
=MolTiC/(MolTiC+MolFeAl+MolAl2O3)
硬質焼結体のFeAlのモル分率
=MolFeAl/(MolTiC+MolFeAl+MolAl2O3)
硬質焼結体のAl2O3のモル分率
=MolAl2O3/(MolTiC+MolFeAl+MolAl2O3)
である。前述の式によって算出されたMolTiC、MolFeAl、MolAl2O3の値を上記式に代入して、TiCモル分率、FeAlモル分率、およびAl2O3モル分率を算出した。
MolAl@Al2O3=2×MolAl2O3〔mol〕
である。
硬質焼結体100gに含まれる鉄アルミナイド中のAlの物質量、すなわちAl2O3中のAlを除いた硬質焼結体100gに含まれるAlの物質量であるMolAl@FeAlは、混合粉末95.94gに含まれていたFeAl2中のAlの物質量であるMolAl@FeAl2を用いると、
MolAl@FeAl=2×MolAl@FeAl2−MolAl@Al2O3
=2×MolAl@FeAl2−2×MolAl2O3〔mol〕
である。ここで、MolAl@FeAl2=2×MolFeAl2〔mol〕であるから、前述の式によって算出されたMolAl2O3と混合粉末配合時のMolFeAl2の値を上記式に代入して、MolAl@FeAlを算出した。
結合相中の鉄アルミナイド中のAlモル分率
=MolAl@FeAl/(MolAl@FeAl+MolFeAl2)
である。前述の式によって算出されたMolAl@FeAlと混合粉末配合時のMolFeAl2の値を上記式に代入して、結合相中の鉄アルミナイド中のAlモル分率を算出した。
結合相中のAl2O3のモル分率
=MolAl2O3/(MolFeAl2+MolAl2O3)
である。前述の式によって算出されたMolAl2O3と混合粉末配合時のMolFeAl2の値を上記式に代入して、結合相中のAl2O3のモル分率を算出した。
Claims (17)
- 結合相が8.8〜34.4mol%含有され、残部が硬質相および不可避不純物からなる硬質焼結体であって、
前記結合相が、FeAlを主成分とする鉄アルミナイドと、前記鉄アルミナイド中に分散した粒径1μm以下のアルミナとを含有し、
前記硬質相が、周期表の4族金属、5族金属、および6族金属の炭化物、窒化物、炭窒化物、およびホウ化物、ならびにこれらの固溶体の中から選ばれた少なくとも一種からなる硬質焼結体。 - 前記硬質相が、Tiの炭化物、窒化物、炭窒化物、およびホウ化物、ならびにこれらの固溶体の中から選ばれた少なくとも一種からなる請求項1に記載の硬質焼結体。
- 前記硬質相が、炭化タングステンおよびその固溶体の少なくとも一方からなる請求項1に記載の硬質焼結体。
- ボロン、シリコン、クロム、ニオブ、およびモリブテンの中から選ばれた少なくとも一種が、前記結合相にさらに含有される請求項1〜3のいずれか1項に記載の硬質焼結体。
- 前記結合相中の前記アルミナの含有量が24.2〜50.0mol%である請求項1〜4のいずれか1項に記載の硬質焼結体。
- 前記結合相中の鉄アルミナイドのアルミニウムの含有量が24.6〜57.7mol%である請求項1〜5のいずれか1項に記載の硬質焼結体。
- FeAl2、Fe2Al5、およびFeAl3の中から選ばれた少なくとも一種からなる鉄アルミナイド粉末を含有する結合粒子粉末と、周期表の4族金属、5族金属、および6族金属の炭化物、窒化物、炭窒化物、およびホウ化物の中から選ばれた少なくとも一種からなる硬質粒子粉末とを、混合および粉砕して混合粉末を得る混合粉砕工程と、
前記混合粉末を焼結する焼結工程と、
を有する硬質焼結体の製造方法。 - 前記硬質粒子粉末が、Tiの炭化物、窒化物、炭窒化物、およびホウ化物の中から選ばれた少なくとも一種からなる請求項7に記載の硬質焼結体の製造方法。
- 前記硬質粒子粉末が、炭化タングステンからなる請求項7に記載の硬質焼結体の製造方法。
- 前記混合粉末中の前記鉄アルミナイド粉末の含有量が2.4〜24.4mol%であり、前記混合粉末中の前記硬質粒子粉末の含有量が75.6〜97.6mol%である請求項7〜9のいずれか1項に記載の硬質焼結体の製造方法。
- ボロン、シリコン、クロム、ニオブ、およびモリブテンの中から選ばれた少なくとも一種の添加粉末が、前記結合粒子粉末にさらに含有される請求項7〜10のいずれか1項に記載の硬質焼結体の製造方法。
- Fe、FeB、Fe3Al、およびFeAlの中から選ばれた少なくとも一種からなる鉄系粉末が、前記結合粒子粉末にさらに含有される請求項7〜11のいずれか1項に記載の硬質焼結体の製造方法。
- 前記混合粉砕工程が、所定の酸素量を含有する前記混合粉末が得られるまで、前記結合粒子粉末と前記硬質粒子粉末とを有機溶媒を用いた湿式混合粉砕して前記混合粉末を得る過程を備える請求項7〜12のいずれか1項に記載の硬質焼結体の製造方法。
- 前記混合粉砕工程が、所定の酸素量を含有する前記混合粉末が得られるまで、真空のミル容器内またはアルゴンもしくは窒素で置換したミル容器内で、前記結合粒子粉末と前記硬質粒子粉末とを乾式混合粉砕後、大気暴露して前記混合粉末を得る過程を備える請求項7〜12のいずれか1項に記載の硬質焼結体の製造方法。
- 前記焼結工程が、前記混合粉末を加圧成形した後に、真空雰囲気、アルゴン雰囲気、または窒素雰囲気で焼結する過程を備える請求項13または14に記載の硬質焼結体の製造方法。
- 前記焼結工程が、前記混合粉末を加圧しながら、真空雰囲気、アルゴン雰囲気、または窒素雰囲気で焼結する過程を備える請求項13または14に記載の硬質焼結体の製造方法。
- 請求項1〜6のいずれか1項に記載の硬質焼結体を原材料とする切削用または耐摩耗用の工具。
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