JP6071365B2 - 機械部品の製造方法 - Google Patents
機械部品の製造方法 Download PDFInfo
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- JP6071365B2 JP6071365B2 JP2012205627A JP2012205627A JP6071365B2 JP 6071365 B2 JP6071365 B2 JP 6071365B2 JP 2012205627 A JP2012205627 A JP 2012205627A JP 2012205627 A JP2012205627 A JP 2012205627A JP 6071365 B2 JP6071365 B2 JP 6071365B2
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- 238000004519 manufacturing process Methods 0.000 title claims description 55
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 168
- 229910000831 Steel Inorganic materials 0.000 claims description 84
- 239000010959 steel Substances 0.000 claims description 84
- 238000010438 heat treatment Methods 0.000 claims description 80
- 229910052757 nitrogen Inorganic materials 0.000 claims description 75
- 239000007789 gas Substances 0.000 claims description 68
- 238000000034 method Methods 0.000 claims description 53
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 32
- 229910052720 vanadium Inorganic materials 0.000 claims description 31
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 31
- 230000003647 oxidation Effects 0.000 claims description 29
- 238000007254 oxidation reaction Methods 0.000 claims description 29
- 230000009466 transformation Effects 0.000 claims description 27
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 18
- 238000010791 quenching Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 12
- 230000001590 oxidative effect Effects 0.000 claims description 11
- 230000000171 quenching effect Effects 0.000 claims description 11
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- 239000007800 oxidant agent Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 45
- 230000008569 process Effects 0.000 description 23
- 239000002344 surface layer Substances 0.000 description 18
- 238000005121 nitriding Methods 0.000 description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 11
- 229910052799 carbon Inorganic materials 0.000 description 11
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 8
- 229910021529 ammonia Inorganic materials 0.000 description 8
- 238000005242 forging Methods 0.000 description 8
- 239000003921 oil Substances 0.000 description 8
- 238000009826 distribution Methods 0.000 description 7
- 238000005256 carbonitriding Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000001294 propane Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000001273 butane Substances 0.000 description 3
- 238000005261 decarburization Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 3
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 229910000760 Hardened steel Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229940062043 nitrogen 50 % Drugs 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910000658 steel phase Inorganic materials 0.000 description 1
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- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
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- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
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- C23C8/24—Nitriding
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- C21D1/06—Surface hardening
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- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
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- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
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- C23C8/10—Oxidising
- C23C8/12—Oxidising using elemental oxygen or ozone
- C23C8/14—Oxidising of ferrous surfaces
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- C23C8/34—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in more than one step
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Description
まず、本発明の一実施の形態である実施の形態1について説明する。図1を参照して、実施の形態1における機械部品の製造方法では、工程(S10)として鋼部材準備工程が実施される。この工程(S10)では、鋼からなり、機械部品の概略形状に成形された部材である鋼部材が準備される。具体的には、たとえば0.1質量%以上のバナジウムを含有する鋼であるAMS2315の鋼材、あるいはJIS規格SUJ2に0.1質量%以上のバナジウムを添加した成分組成を有する鋼材などが準備され、鍛造、旋削などの加工が実施されることにより鋼部材が作製される。
次に、図4を参照して、本発明の他の実施の形態である実施の形態2について説明する。実施の形態2における機械部品の製造方法は、基本的には実施の形態1の場合と同様に実施される。しかし、実施の形態2における機械部品の製造方法は、熱間鍛造工程を含む点において実施の形態1の場合とは異なっている。
Claims (10)
- 鋼からなる部材を準備する工程と、
前記部材の表面にバナジウムを含む膜を形成する工程と、
前記膜が形成された前記部材を、窒素ガスを含みアンモニアガスを含まない熱処理ガス雰囲気中において加熱することにより窒素富化層を形成する工程とを備え、
前記部材を準備する工程では、0.1質量%以上のバナジウムを含有する鋼からなる部材が準備され、
前記膜を形成する工程では、前記部材が500℃以上であって前記鋼のA1変態点未満の温度域に加熱されて酸化される、機械部品の製造方法。 - 前記熱処理ガスは吸熱型変成ガスを含んでいる、請求項1に記載の機械部品の製造方法。
- 前記熱処理ガスは、窒素ガスと還元性ガスとの混合ガスである、請求項1に記載の機械部品の製造方法。
- 前記熱処理ガスは、窒素ガスを含み、酸素分圧が10−16Pa以下となっている、請求項1に記載の機械部品の製造方法。
- 前記熱処理ガスは、還元性ガスを含むことにより酸素分圧が10−16Pa以下となっている、請求項4に記載の機械部品の製造方法。
- 前記還元性ガスは水素ガスである、請求項5に記載の機械部品の製造方法。
- 前記窒素富化層を形成する工程は、前記膜を形成する工程において前記温度域に加熱された前記部材が室温まで冷却されることなく実施される、請求項1〜6のいずれか1項に記載の機械部品の製造方法。
- 前記膜を形成する工程では、前記部材が酸化性雰囲気の熱処理室内において加熱され、
前記窒素富化層を形成する工程では、前記熱処理室内の雰囲気が前記熱処理ガスに置換されたうえで、前記部材が前記熱処理室内で加熱されて窒素富化層が形成される、請求項1〜7のいずれか1項に記載の機械部品の製造方法。 - 窒素富化層が形成された前記部材を、A1変態点以上の温度からMS点以下の温度に冷却することにより前記部材を焼入硬化する工程をさらに備え、
前記膜を形成する工程では、前記部材が酸化装置内において酸化されることにより前記膜が形成され、
前記窒素富化層が形成される工程では、前記膜が形成された前記部材が、搬送装置を介して前記酸化装置に接続された窒素富化層形成装置内に前記搬送装置によって搬送されたうえで、前記窒素富化層形成装置内において前記窒素富化層が形成され、
前記部材を焼入硬化する工程では、前記窒素富化層形成装置に接続された焼入装置内において前記部材が焼入硬化される、請求項1〜7のいずれか1項に記載の機械部品の製造方法。 - 前記機械部品は転がり軸受を構成する部品である、請求項1〜9のいずれか1項に記載の機械部品の製造方法。
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US4193825A (en) * | 1977-06-28 | 1980-03-18 | Kayaba Industry Co., Ltd. | Method of carbon nitriding a metal workpiece |
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JPS6160875A (ja) * | 1984-08-31 | 1986-03-28 | Hitachi Ltd | タ−ビン材料の製造方法 |
US5273585A (en) * | 1990-03-27 | 1993-12-28 | Mazda Motor Corporation | Heat-treating apparatus |
JP3128803B2 (ja) * | 1990-04-27 | 2001-01-29 | 日本精工株式会社 | 転がり軸受 |
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US5970308A (en) * | 1998-08-07 | 1999-10-19 | Air Products And Chemicals, Inc. | Method for de-lubricating powder metal compacts |
JP2002060847A (ja) * | 2000-08-22 | 2002-02-28 | Ntn Corp | 耐熱浸炭転がり軸受部品およびその製造方法 |
US7829194B2 (en) * | 2003-03-31 | 2010-11-09 | Ut-Battelle, Llc | Iron-based alloy and nitridation treatment for PEM fuel cell bipolar plates |
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