US20110076176A1 - Cast compressor articles and methods of forming same - Google Patents

Cast compressor articles and methods of forming same Download PDF

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Publication number
US20110076176A1
US20110076176A1 US12/567,957 US56795709A US2011076176A1 US 20110076176 A1 US20110076176 A1 US 20110076176A1 US 56795709 A US56795709 A US 56795709A US 2011076176 A1 US2011076176 A1 US 2011076176A1
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US
United States
Prior art keywords
compressor
approximately
article
based alloy
forming
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/567,957
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English (en)
Inventor
Junyoung Park
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Priority to US12/567,957 priority Critical patent/US20110076176A1/en
Assigned to GENERAL ELECTRIC COMPANY reassignment GENERAL ELECTRIC COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PARK, JUNYOUNG (NMN)
Priority to EP10175726A priority patent/EP2302088A1/en
Priority to JP2010211479A priority patent/JP2011067870A/ja
Priority to CN2010105039160A priority patent/CN102031449A/zh
Publication of US20110076176A1 publication Critical patent/US20110076176A1/en
Abandoned legal-status Critical Current

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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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • C21D2211/005—Ferrite
    • 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
    • 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
    • C21D6/02—Hardening by precipitation

Definitions

  • the invention relates generally to cast compressor articles. More particularly, the invention relates to cast airfoils, stators, blades, gas turbines, gas turbine shells, etc, and methods of forming the same.
  • a first aspect of the disclosure provides a method of forming a compressor article comprising: preparing an iron-manganese-aluminum-silicon-carbon (Fe—Mn—Al—Si—C) based alloy; casting the Fe—Mn—Al—Si—C based alloy, wherein a cast has a shape of a compressor article; and performing post-casting finishing thereby forming the compressor article.
  • Fe—Mn—Al—Si—C iron-manganese-aluminum-silicon-carbon
  • a second aspect of the disclosure provides a method of forming a compressor article comprising: preparing an iron-manganese-aluminum-silicon-carbon (Fe—Mn—Al—Si—C) based alloy; casting the Fe—Mn—Al—Si—C based alloy, wherein a cast has a shape of a compressor article selected from the group consisting of an airfoil, a stator, a gas turbine, a blade, and a gas turbine shell, and performing post-casting finishing thereby forming the compressor article.
  • Fe—Mn—Al—Si—C iron-manganese-aluminum-silicon-carbon
  • a third aspect of the disclosure provides a compressor including a part made of an iron-manganese-aluminum-silicon-carbon (Fe—Mn—Al—Si—C) based alloy.
  • FIG. 1 shows a flow diagram of an embodiment of a method of forming a compressor article, in accordance with the present invention.
  • FIG. 2 shows a compressor blade in an embodiment of a compressor part, in accordance with the present invention.
  • FIG. 1 an embodiment of a method of forming a compressor article is shown.
  • the method comprises: a first step S 1 , preparing an iron-manganese-aluminum-silicon-carbon (Fe—Mn—Al—Si—C) based alloy; a second step S 2 , casting the Fe—Mn—Al—Si—C based alloy, wherein a cast has a shape of a compressor article; and a third step S 3 , performing post-casting finishing thereby forming the compressor article.
  • a first step S 1 preparing an iron-manganese-aluminum-silicon-carbon (Fe—Mn—Al—Si—C) based alloy
  • a second step S 2 casting the Fe—Mn—Al—Si—C based alloy, wherein a cast has a shape of a compressor article
  • a third step S 3 performing post-casting finishing thereby forming the compressor article.
  • the Fe—Mn—Al—Si—C based alloy comprises approximately 54.3%-76.4% Fe, approximately 12%-30% Mn, approximately 5%-12% Al, approximately 0.3%-2.5% Si, and approximately 0.3%-1.2% C.
  • the Fe—Mn—Al—Si—C based alloy comprises approximately 59.5% Fe, approximately 29.4% Mn, approximately 8.8% Al, approximately 1.3% Si, and approximately 1% C.
  • the Fe—Mn—Al—Si—C based alloy additionally comprises approximately 0.5%-1% Molybdenum (Mo).
  • the Fe—Mn—Al—Si—C based alloy may be prepared by melting the components of the alloy in an argon atmosphere to minimize oxidation and to form a molten metal Fe—Mn—Al—Si—C based alloy.
  • the process to provide the molten Fe—Mn—Al—Si—C based alloy, as described, is well known in the art and thus, for the sake of brevity, no further description is provided.
  • the prepared Fe—Mn—Al—Si—C based alloy has casting characteristics similar to ductile iron with improved age hardening characteristics.
  • the Fe—Mn—Al—Si—C based alloy possesses low density (6.5-7.2 g/cm 3 ), tensile strength (UTS) from 600 MPa to 2000 MPa, and excellent ductility as great as over 70% strain to failure when solution treated, elongation from 10% to 70%, and yield strength (YS) from 600 to 1000 MPa.
  • the superior fluidity and the age-hardening ability characteristics of the Fe—Mn—Al—Si—C based alloy allow it to be used to produce compressor articles utilizing near-net shape casting processes. Examples of the casting processes are described infra.
  • the Fe—Mn—Al—Si—C based alloy has two major matrix constituents (austenite and ferrite). The two constituents increase the dampening capability of compressor articles formed having the Fe—Mn—Al—Si—C based alloy.
  • Table I compares properties of the Fe—Mn—Al—Si—C based alloy with other alloys typically used in forming processes for compressor articles.
  • casting an Fe—Mn—Al—Si—C based alloy wherein the cast has a shape of a compressor article in an embodiment of the present invention casting is selected from the group consisting of sand casting, investment casting, permanent mold casting, and die casting.
  • the aforementioned casting processes, as described, are well known in the art and thus, for the sake of brevity, no further description is provided.
  • the aforementioned casting processes also are near-net shape processes requiring very little post process machining, if any.
  • the Fe—Mn—Al—Si—C based alloy prepared in method step S 1 is poured into pre-made molds (permanent molds) in the shape of a compressor article.
  • the molds have cavities that match the geometrical shape of the final compressor article.
  • the molds also have a gating system that provides channels to the cavity of the mold.
  • the cast is in a mold having a geometrical shape selected from the group consisting of an airfoil, a stator, a gas turbine, a blade, and a gas turbine shell.
  • the Fe—Mn—Al—Si—C based alloy may be cast using a technique not specifically mentioned or later developed techniques appropriate for the alloy to be cast.
  • post-casting finishing includes but is not limited to separating the article from the mold, heat treating the separated article, age hardening the separated article, and process machining.
  • the cast article is separated from the gating system with saw cuts.
  • the separated article is then solution heat treated to meet mechanical properties pre-selected for the article.
  • Solution heat treatment may be performed at 1,000° C. or above in an atmosphere that prevents decarburization and oxidation.
  • Age hardening may then be performed in a temperature range from approximately 500° C. to 650° C. at a period of time required to obtain a pre-selected mechanical property for the article.
  • the post casting steps may be performed using a technique not specifically mentioned or later developed techniques appropriate for the post casting treatment of the cast Fe—Mn—Al—Si—C based alloy.
  • the compressor article formed from S 3 includes but is not limited to an airfoil, a stator, a gas turbine, a blade, and a gas turbine shell.
  • the formed article has the characteristics as described in Table I supra as well as comparable oxidation and weldability properties to 304SS (Stainless Steel).
  • the formed article also is 12%-18% lighter than High Strength Lightweight Aluminum (HSLA) steels.
  • the formed article also is less expensive than conventional stainless steel articles which require high chromium additions and expensive nickel additions.
  • a compressor blade 1 is shown, in an embodiment of a compressor part/article, according to the present invention.
  • the compressor includes a compressor blade 1 comprising an iron-manganese-aluminum-silicon-carbon (Fe—Mn—Al—Si—C) based alloy.
  • Fe—Mn—Al—Si—C iron-manganese-aluminum-silicon-carbon
  • the compressor blade 1 is formed via casting.
  • the compressor part(s) is selected from the group consisting of an airfoil, a stator, a gas turbine, a blade, and a gas turbine shell.
  • first,” “second,” and the like, herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another, and the terms “a” and “an” herein do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced item.
  • the modifier “approximately” used in connection with a quantity is inclusive of the stated value and has the meaning dictated by the context, (e.g., includes the degree of error associated with measurement of the particular quantity).
  • the suffix “(s)” as used herein is intended to include both the singular and the plural of the term that it modifies, thereby including one or more of that term (e.g., the metal(s) includes one or more metals).
  • Ranges disclosed herein are inclusive and independently combinable (e.g., ranges of “up to about 25 wt %, or, more specifically, about 5 wt % to about 20 wt %”, is inclusive of the endpoints and all intermediate values of the ranges of “about 5 wt % to about 25 wt %,” etc).

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US12/567,957 2009-09-28 2009-09-28 Cast compressor articles and methods of forming same Abandoned US20110076176A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US12/567,957 US20110076176A1 (en) 2009-09-28 2009-09-28 Cast compressor articles and methods of forming same
EP10175726A EP2302088A1 (en) 2009-09-28 2010-09-08 Cast compressor articles and methods of forming same
JP2010211479A JP2011067870A (ja) 2009-09-28 2010-09-22 鋳造圧縮機物品及びそれを形成する方法
CN2010105039160A CN102031449A (zh) 2009-09-28 2010-09-25 铸造压缩机用品及其形成方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12/567,957 US20110076176A1 (en) 2009-09-28 2009-09-28 Cast compressor articles and methods of forming same

Publications (1)

Publication Number Publication Date
US20110076176A1 true US20110076176A1 (en) 2011-03-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
US12/567,957 Abandoned US20110076176A1 (en) 2009-09-28 2009-09-28 Cast compressor articles and methods of forming same

Country Status (4)

Country Link
US (1) US20110076176A1 (zh)
EP (1) EP2302088A1 (zh)
JP (1) JP2011067870A (zh)
CN (1) CN102031449A (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2625512C2 (ru) * 2015-12-03 2017-07-14 Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский технологический университет "МИСиС" Конструкционная литейная аустенитная стареющая сталь с высокой удельной прочностью и способ ее обработки

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103643110B (zh) * 2013-12-26 2015-12-30 北京科技大学 一种球磨机用轻质高锰钢衬板及其制备方法
CN106480366A (zh) * 2015-08-31 2017-03-08 鞍钢股份有限公司 一种高等轴晶率高锰钢钢锭及其冶炼方法
CN107502818B (zh) * 2017-08-08 2019-03-19 武钢集团昆明钢铁股份有限公司 一种高强低密度耐蚀特种锻件钢及其制备方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1892316A (en) * 1929-12-26 1932-12-27 Bonney Floyd Co Noncorrosive steel alloy
US4944814A (en) * 1989-03-02 1990-07-31 Ipsco Enterprises, Inc. Aluminum-manganese-iron steel alloy
US4975335A (en) * 1988-07-08 1990-12-04 Fancy Steel Corporation Fe-Mn-Al-C based alloy articles and parts and their treatments

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB841366A (en) * 1957-07-02 1960-07-13 Langley Alloys Ltd Improvements in iron aluminium alloys
GB2220674A (en) * 1988-06-29 1990-01-17 Nat Science Council Alloys useful at elevated temperatures
DE102005057599A1 (de) * 2005-12-02 2007-06-06 Volkswagen Ag Leichtbaustahl
WO2010052052A1 (de) * 2008-11-07 2010-05-14 Siemens Aktiengesellschaft Rotor für eine strömungsmaschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1892316A (en) * 1929-12-26 1932-12-27 Bonney Floyd Co Noncorrosive steel alloy
US4975335A (en) * 1988-07-08 1990-12-04 Fancy Steel Corporation Fe-Mn-Al-C based alloy articles and parts and their treatments
US4944814A (en) * 1989-03-02 1990-07-31 Ipsco Enterprises, Inc. Aluminum-manganese-iron steel alloy

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2625512C2 (ru) * 2015-12-03 2017-07-14 Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский технологический университет "МИСиС" Конструкционная литейная аустенитная стареющая сталь с высокой удельной прочностью и способ ее обработки

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Publication number Publication date
EP2302088A1 (en) 2011-03-30
JP2011067870A (ja) 2011-04-07
CN102031449A (zh) 2011-04-27

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AS Assignment

Owner name: GENERAL ELECTRIC COMPANY, NEW YORK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PARK, JUNYOUNG (NMN);REEL/FRAME:023295/0366

Effective date: 20090923

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION