JP6640752B2 - コバルトフリー、耐かじり性および耐摩耗性オーステナイト系表面硬化ステンレス合金鋼 - Google Patents
コバルトフリー、耐かじり性および耐摩耗性オーステナイト系表面硬化ステンレス合金鋼 Download PDFInfo
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- JP6640752B2 JP6640752B2 JP2016574183A JP2016574183A JP6640752B2 JP 6640752 B2 JP6640752 B2 JP 6640752B2 JP 2016574183 A JP2016574183 A JP 2016574183A JP 2016574183 A JP2016574183 A JP 2016574183A JP 6640752 B2 JP6640752 B2 JP 6640752B2
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- 229910001256 stainless steel alloy Inorganic materials 0.000 title claims description 19
- 238000005299 abrasion Methods 0.000 title description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 46
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 24
- 229910052757 nitrogen Inorganic materials 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 19
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 14
- 238000001513 hot isostatic pressing Methods 0.000 claims description 14
- 229910052742 iron Inorganic materials 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- 238000000137 annealing Methods 0.000 claims description 6
- 229910001566 austenite Inorganic materials 0.000 claims description 5
- 238000010791 quenching Methods 0.000 claims description 5
- 230000000171 quenching effect Effects 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 150000004767 nitrides Chemical class 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 150000001247 metal acetylides Chemical group 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims 6
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims 6
- 229910052799 carbon Inorganic materials 0.000 claims 6
- 239000011651 chromium Substances 0.000 claims 6
- 229910052804 chromium Inorganic materials 0.000 claims 6
- 239000012535 impurity Substances 0.000 claims 6
- 229910052748 manganese Inorganic materials 0.000 claims 6
- 239000011572 manganese Substances 0.000 claims 6
- 229910052750 molybdenum Inorganic materials 0.000 claims 6
- 239000011733 molybdenum Substances 0.000 claims 6
- 229910052710 silicon Inorganic materials 0.000 claims 6
- 239000010703 silicon Substances 0.000 claims 6
- 229910045601 alloy Inorganic materials 0.000 description 55
- 239000000956 alloy Substances 0.000 description 55
- 229910000734 martensite Inorganic materials 0.000 description 18
- 230000009466 transformation Effects 0.000 description 12
- 238000005482 strain hardening Methods 0.000 description 11
- 239000011159 matrix material Substances 0.000 description 10
- 238000005552 hardfacing Methods 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 229910001220 stainless steel Inorganic materials 0.000 description 7
- 238000004663 powder metallurgy Methods 0.000 description 6
- 239000010410 layer Substances 0.000 description 5
- 229910017052 cobalt Inorganic materials 0.000 description 4
- 239000010941 cobalt Substances 0.000 description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910000531 Co alloy Inorganic materials 0.000 description 3
- 229910001347 Stellite Inorganic materials 0.000 description 3
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000000181 anti-adherent effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011195 cermet Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
- B22F3/15—Hot isostatic pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
- C22C33/0285—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5% with Cr, Co, or Ni having a minimum content higher than 5%
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K25/00—Details relating to contact between valve members and seats
- F16K25/005—Particular materials for seats or closure elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/001—Austenite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/004—Dispersions; Precipitations
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2241/00—Treatments in a special environment
- C21D2241/01—Treatments in a special environment under pressure
- C21D2241/02—Hot isostatic pressing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12951—Fe-base component
- Y10T428/12972—Containing 0.01-1.7% carbon [i.e., steel]
- Y10T428/12979—Containing more than 10% nonferrous elements [e.g., high alloy, stainless]
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- Organic Chemistry (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Heat Treatment Of Articles (AREA)
- Powder Metallurgy (AREA)
Description
窒素は従来、ステンレス鋼のオーステナイト安定化元素であり、積層欠陥エネルギーを増加させると考えられる。304または316などの従来の18−8ステンレス鋼では、典型的な窒素濃度は低く、窒素はオーステナイト相を安定化させ、かつ、確かに積層欠陥エネルギーを増加させる。しかし、高濃度窒素(>0.2wt%N)では、窒素は顕微鏡レベルの積層欠陥を形成するのに必要なエネルギーを著しく減少させる可能性がある(図1)。最適範囲は、本合金において、0.44〜0.55wt%の窒素含有量であることが判明した。この効果は、SFEにおける非線形結果の原因である、積層欠陥への窒素の偏析またはクラスター効果に起因する。
更に、オーステナイト系ステンレス鋼では、低温にて、ひずみ誘起FCC→BCCマルテンサイト変態により、高いひずみ硬化率を達成することができる。オーステナイト系ステンレス合金鋼は、室温にて準安定であるFCC相をベースとするものがある。ひずみまたは変形がこのオーステナイト系合金群に導入されると、微細構造は、より高強度のマルテンサイト微細構造に変態することがある。これらのマルテンサイト構造の結晶構造は、HCP、体心立方(BCC)、体心正方(BCT)、またはそれらの組み合わせになり得る。マルテンサイト微細構造は、耐エロージョン、耐摩耗、耐かじり性能を向上させることで知られる。
延性マトリックス中の硬質粒子から構成される不均一微細構造が、耐アブレシブ摩耗性および耐凝着摩耗性を向上させることは知られている。二面間(界面)の凝着性を低下させ、表面変形を防ぎ、かつ、摩耗粒子形成のための低エネルギー経路を提供することにより、全体の摩耗率は減少する。更に、より延性のあるマトリックスへの塑性ひずみのパーティショニング(分配処理;partitioning)は、ひずみ誘起によるマルテンサイト変態を増加させ、かつ、ひずみ硬化率を向上させる。これは、ひずみの局所化に対する抵抗を向上させ、耐かじり性を向上させる。これらの効果は、通常サーメット(金属マトリックス中にセラミック粒子が埋め込まれたもの)クラッド材に利用される。しかし、本明細書に記載される合金では、硬質第二相は、合金化学に、最適な体積分率で設計される。これにより、比較的長い期間での高温安定性、靱性の増加、改良された熱膨張適合性(部品製造用)をもたらしつつ、高温度にて、高い耐摩耗性および耐かじり性を依然として保持する。
本明細書で記載される表面硬化合金は、粉末冶金HIP法、および最適な溶体化焼鈍熱処理の組み合わせが適用され、適した微細構造を作り出す。粉末冶金技術は、従来の溶接クラッド技術または溶射技術と比較して、優れた微細構造、組成、および欠陥制御を提供する。部品の表面硬化における最初のステップは、従来の粉体冶金技術を利用して部品の表面に粉末形態の合金の層を施すと共に接着させ、その後、施された層を有する部品に従来のHIPプロセスを行う。適切な合金化学および熱処理条件を確立するために、多くの熱力学的モデリングおよび相モデリングが実施された。HIP処理温度で、分散された硬質第二相を有する完全(または略完全)オーステナイトFCCマトリックス構造を生成することが望ましいということが分かった。図2に示すように、相モデリングは、急冷(焼入れ)が、HIP処理温度で所定時間処理した後に直ちに行われたのなら、HIP処理温度で略完全オーステナイトFCCマトリックス構造を生成することができることを示した。残念ながらほとんどのHIP設備は空冷式であるため、室温に達するのに何時間もかかる。
Claims (13)
- オーステナイト主相中に分散された硬質第二相を有するひずみ硬化ステンレス合金鋼であって、前記ひずみ硬化ステンレス合金鋼は、
クロム:21.0〜27.0wt%、
マンガン:3.0〜7.0wt%、
ニッケル:2.0〜6.0wt%、
シリコン:1.5〜4.0wt%、
モリブデン:1.0〜5.0wt%、
炭素:0.9〜1.3wt%、
窒素:0.3〜0.6wt%、
残部:鉄および不純物、
から成る、ひずみ硬化ステンレス合金鋼。 - 前記ひずみ硬化ステンレス合金鋼は、
クロム:21.0〜27.0wt%、
マンガン:3.0〜7.0wt%、
ニッケル:2.0〜6.0wt%、
シリコン:1.5〜4.0wt%、
モリブデン:1.0〜5.0wt%、
炭素:0.9〜1.3wt%、
窒素:0.44〜0.55wt%、
残部:鉄および不純物、
から成る請求項1に記載のひずみ硬化ステンレス合金鋼。 - 前記ひずみ硬化ステンレス合金鋼は、
クロム:25.73wt%
マンガン:4.78wt%
ニッケル:4.37wt%、
シリコン:3.34wt%、
モリブデン:2.04wt%、
炭素:1.21wt%、
窒素:0.46wt%、
残部:鉄および不純物、
から成る請求項2に記載のひずみ硬化ステンレス合金鋼。 - 前記硬質第二相は炭化物および窒化物の少なくとも1つを含む請求項1から3のいずれか1項に記載のひずみ硬化ステンレス合金鋼。
- 部品表面を有する金属部品と、
前記部品表面に適用される請求項1から4のいずれか1項に記載のひずみ硬化ステンレス合金鋼の層と、を含む、
表面硬化部品。 - バルブシートである、請求項5に記載の表面硬化部品。
- 表面硬化金属部品の製造方法であって、
粉末状のステンレス合金鋼の層を金属部品の表面に接着するステップであって、前記層は外面を規定し、前記ステンレス合金鋼は、オーステナイト主相中に分散された硬質第二相を含み、前記ステンレス合金鋼が、クロム:21.0〜27.0wt%、マンガン:3.0〜7.0wt%、ニッケル:2.0〜6.0wt%、シリコン:1.5〜4.0wt%、モリブデン:1.0〜5.0wt%、炭素:0.9〜1.3wt%、窒素:0.3〜0.6wt%、残部:鉄および不純物から成るステップと、
前記層を熱間等方圧加圧(HIP)温度にて熱間等方圧加圧し、前記層を前記部品に接着させるステップと、
前記層を空冷するステップと、
前記HIP温度より高い溶体化焼鈍温度に前記層を加熱するステップと、
前記層を水焼入れするステップと、
を含む表面硬化金属部品の製造方法。 - 前記HIP温度は1050℃である請求項7に記載の製造方法。
- 前記溶体化焼鈍温度は1100℃を超える請求項7に記載の製造方法。
- 前記ステンレス合金鋼は、
クロム:21.0〜27.0wt%、
マンガン:3.0〜7.0wt%、
ニッケル:2.0〜6.0wt%、
シリコン:1.5〜4.0wt%、
モリブデン:1.0〜5.0wt%、
炭素:0.9〜1.3wt%、
窒素:0.44〜0.55wt%、
残部:鉄および不純物、
から成る請求項7から9のいずれか1項に記載の製造方法。 - 前記ステンレス合金鋼は、
クロム:25.73wt%
マンガン:4.78wt%
ニッケル:4.37wt%、
シリコン:3.34wt%、
モリブデン:2.04wt%、
炭素:1.21wt%、
窒素:0.46wt%、
残部:鉄および不純物、
から成る請求項10に記載の製造方法。 - 前記硬質第二相は炭化物および窒化物の少なくとも1つを含む請求項7から11のいずれか1項に記載の製造方法。
- 前記外面のステンレス合金鋼の薄層をひずみ硬化させるために、前記表面硬化金属部品に機械的応力を与えるステップを更に含む、請求項7から12のいずれか1項に記載の製造方法。
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US14/743,348 | 2015-06-18 | ||
US14/743,348 US10094010B2 (en) | 2014-06-19 | 2015-06-18 | Cobalt-free, galling and wear resistant austenitic stainless steel hard-facing alloy |
PCT/US2015/036612 WO2015196032A1 (en) | 2014-06-19 | 2015-06-19 | Cobalt-free, galling and wear resistant austenitic stainless steel hard-facing alloy |
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WO2019043461A2 (en) * | 2017-08-31 | 2019-03-07 | Emerson Process Management (Tianjin) Valves Co., Ltd. | MECHANICAL FASTENING METHOD FOR CARBIDE TIP VALVE CAP |
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US3165400A (en) | 1961-06-27 | 1965-01-12 | Chrysler Corp | Castable heat resisting iron alloy |
US3912503A (en) | 1973-05-14 | 1975-10-14 | Armco Steel Corp | Galling resistant austenitic stainless steel |
US4803045A (en) | 1986-10-24 | 1989-02-07 | Electric Power Research Institute, Inc. | Cobalt-free, iron-base hardfacing alloys |
US4929419A (en) * | 1988-03-16 | 1990-05-29 | Carpenter Technology Corporation | Heat, corrosion, and wear resistant steel alloy and article |
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US5340534A (en) | 1992-08-24 | 1994-08-23 | Crs Holdings, Inc. | Corrosion resistant austenitic stainless steel with improved galling resistance |
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US8430075B2 (en) | 2008-12-16 | 2013-04-30 | L.E. Jones Company | Superaustenitic stainless steel and method of making and use thereof |
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US10094010B2 (en) | 2018-10-09 |
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