US20090191086A1 - Hot-working steel - Google Patents

Hot-working steel Download PDF

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Publication number
US20090191086A1
US20090191086A1 US12/281,607 US28160707A US2009191086A1 US 20090191086 A1 US20090191086 A1 US 20090191086A1 US 28160707 A US28160707 A US 28160707A US 2009191086 A1 US2009191086 A1 US 2009191086A1
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US
United States
Prior art keywords
content
steel
weight
steel according
hot
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
US12/281,607
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English (en)
Inventor
Odd Sandberg
Bengtt Klarenfjord
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.)
Uddeholms AB
Original Assignee
Uddeholms AB
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 Uddeholms AB filed Critical Uddeholms AB
Assigned to UDDEHOLM TOOLING AKTIEBOLAG reassignment UDDEHOLM TOOLING AKTIEBOLAG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KLARENFJORD, BENGT, SANDBERG, ODD
Publication of US20090191086A1 publication Critical patent/US20090191086A1/en
Assigned to UDDEHOLMS AB reassignment UDDEHOLMS AB CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: UDDEHOLM TOOLING AKTIEBOLAG
Abandoned legal-status Critical Current

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Classifications

    • 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
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/06—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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • 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
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • 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
    • C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese

Definitions

  • the invention relates to hot-working steel, i.e. steel intended to be used in the working in hot condition of a working material.
  • Typical examples of the use of the steel are tools for the extrusion pressing of light metals, primarily aluminium. Another form of use is in forging tools.
  • the invention also relates to use of the steel in the manufacturing of hot-working tools and to tools manufactured from the steel.
  • Extrusion pressing means that material in a plasticized condition is pressed through a restriction/nozzle in which the extruded profile/shape of the extrusion pressed material is formed.
  • an extrusion pressing nozzle must have high strength in combination with good resistance to hot wear as well as good resistance to tempering at high temperatures, since a material such as aluminium is normally extruded at temperatures of about 500-600° C.
  • a well known and long used hot-working steel is denoted H13 (or alternatively H11) according to AISI and has the following nominal composition in % by weight. 0.30-0.40 C, 0.20-0.40 Mn, 0.80-1.20 Si, 4.75-5.50 Cr, 1.25-1.75 Mo, 0.80-1.20 V, balance iron and unavoidable impurities, and for H11, in % by weight: 0.30-0.50 V, the remainder the same as for H13.
  • H13 or alternatively H11
  • H13 has the following nominal composition in % by weight. 0.30-0.40 C, 0.20-0.40 Mn, 0.80-1.20 Si, 4.75-5.50 Cr, 1.25-1.75 Mo, 0.80-1.20 V, balance iron and unavoidable impur
  • a hot-working steel can now be provided that, for most applications, has properties comparable with a traditional H13 steel but having a alloying cost that is almost the half (at the metal prices of today). Based on the fact that different steels of H13 type have been on the market for a long time, it is realised that it must be considered surprising that we have been able to find an alloy that is so efficient in solving the above mentioned problems, especially when considering that the important properties of resistance to hot wear against aluminium and thermal conductivity are improved as compared to a traditional H13 alloy.
  • Carbon should be present in an adequate amount to give the steel the desired hardness after heat treatment and to contribute to hardenability. Accordingly, there must be at least 0.3% and for the best result about 0.4% of carbon. Too much carbon has a negative effect on toughness and hence the upper limit should be about 0.45%.
  • Silicon is present as a residual element from the manufacturing of the steel, at a content of normally at least 0.2%, most often about 1%. Silicon increases the carbon activity in the steel and hence it contributes to give the steel an adequate hardness. It also contributes to an adequate resistance to oxidation and tempering. Contents that are too high may lead to brittleness problems due to solution hardening and hence the maximum content of silicon in the steel is 1.5%, preferably not more than 1.2%.
  • Manganese, chromium and molybdenum should be present in the steel at an amount high enough to give the steel an adequate hardenability.
  • Molybdenum has the property that it, besides contributing to hardenability also contributes to a good tempering resistance. Hence, it has been proven that molybdenum is needed at a content of at least 0.3% but not more than 0.8%. Preferably, it is used 0.6% of molybdenum.
  • chromium also contributes to the alloy's oxidation resistance and it should be present at a content of at least 1.5% but not more than 3.0%.
  • the nominal content of chromium is preferably 2.6%.
  • Manganese should be present at a content of at least 0.7% in order to contribute in giving the steel a desired hardenability at the limited content of molybdenum and chromium that characterises the steel.
  • the steel should not contain more than 1.8% manganese.
  • the nominal content of manganese is preferably 1.4%.
  • Vanadium should be present in the steel at a content of at least 0.4% and not more than 0.7%. Vanadium also contributes to give the steel good tempering resistance, good resistance to wear and also contributes to good strength by forming vanadium carbides that contribute to the formation of a relatively fine crystal structure.
  • FIG. 1 shows a graph over the desired resistance to hot wear, for gas nitrided samples in a 4 h test
  • FIG. 2 shows the corresponding test results in an 8 h test.
  • Three alloys have been made in the form of laboratory scale ingots with a weight of 50 kg, by the following process: Forging at 1270° C. to the dimension 60 ⁇ 60 mm. Soft-annealing at 850° C./2 h, cooling by 10° C./h to 600° C. and thereafter free cooling in air.
  • the alloys are heat treated according to Table 2 below.
  • Plate samples having the dimension 5 ⁇ 10 ⁇ 30 mm are produced of each species according to Table 2.
  • One surface of the sample, a side of 5 ⁇ 30 mm, is polished fine with an R A of about 0.10-0.15 ⁇ m.
  • FIG. 1 shows the volume worn off after about 4 h for gas nitrided samples.
  • the graph shows that both samples produced according to the invention, i.e. samples 6 and 7, have improved resistance to wear as compared with the reference steels (sample no. 2).
  • FIG. 2 shows the result from a corresponding 8 h test, showing that an improved resistance to wear could be confirmed for the invention also in such an experiment.
  • the improvement is more than 50% in respect of resistance to wear, as compared with a traditional H13 steel (sample 2).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Articles (AREA)
  • Forging (AREA)
US12/281,607 2006-04-06 2007-03-30 Hot-working steel Abandoned US20090191086A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0600797A SE529809C2 (sv) 2006-04-06 2006-04-06 Varmarbetsstål
SE0600797-5 2006-04-06
PCT/SE2007/050203 WO2007114781A1 (en) 2006-04-06 2007-03-30 Hot-working steel

Publications (1)

Publication Number Publication Date
US20090191086A1 true US20090191086A1 (en) 2009-07-30

Family

ID=38563958

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/281,607 Abandoned US20090191086A1 (en) 2006-04-06 2007-03-30 Hot-working steel

Country Status (16)

Country Link
US (1) US20090191086A1 (ja)
EP (1) EP2002025A1 (ja)
JP (1) JP5185923B2 (ja)
KR (1) KR20090010187A (ja)
CN (1) CN101415854A (ja)
AU (1) AU2007232532B2 (ja)
BR (1) BRPI0710268A2 (ja)
CA (1) CA2659249A1 (ja)
MX (1) MX2008012631A (ja)
NO (1) NO20084230L (ja)
NZ (1) NZ570919A (ja)
RU (1) RU2430186C2 (ja)
SE (1) SE529809C2 (ja)
SG (1) SG170824A1 (ja)
TW (1) TWI355425B (ja)
WO (1) WO2007114781A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2546374A1 (en) * 2010-03-08 2013-01-16 Villares Metals S/A Steel for extrusion tools

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE533283C2 (sv) * 2008-03-18 2010-08-10 Uddeholm Tooling Ab Stål, process för tillverkning av ett stålämne samt process för tillverkning av en detalj av stålet
JP2019119898A (ja) * 2017-12-28 2019-07-22 愛知製鋼株式会社 Ｃｖｔリング素材、ｃｖｔリング部材及びこれらの製造方法
US20210040591A1 (en) * 2018-05-14 2021-02-11 Hitachi Metals, Ltd. Additive layer manufactured hot work tool, method for manufacturing the same, and metal powder for additive layer manufacturing hot work tool

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1850953A (en) * 1925-06-19 1932-03-22 Percy A E Armstrong Heat, rust, and acid resisting ferrous alloy
US4886640A (en) * 1988-08-22 1989-12-12 Carpenter Technology Corporation Hot work tool steel with good temper resistance

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB913525A (en) * 1960-02-18 1962-12-19 Crucible Steel Co America Low cost alloy steel
JPS524414A (en) * 1975-06-24 1977-01-13 Hitachi Ltd Reinforced rolls for rolling
JPS5380318A (en) * 1976-12-27 1978-07-15 Daido Steel Co Ltd Hot tool steel with excellent high temperature strength
JPS5456913A (en) * 1977-10-15 1979-05-08 Daido Steel Co Ltd Steel for hot rolling mold
JPS5782458A (en) * 1980-11-07 1982-05-22 Hitachi Metals Ltd High toughness tool steel for hot working
US4853181A (en) 1986-06-18 1989-08-01 Wert David E Hot work tool steel
DE4321433C1 (de) 1993-06-28 1994-12-08 Thyssen Stahl Ag Verwendung eines Warmarbeitsstahls
JP3538995B2 (ja) * 1994-09-29 2004-06-14 日本精工株式会社 転がり軸受
JP3352889B2 (ja) * 1996-10-16 2002-12-03 山陽特殊製鋼株式会社 窒化特性に優れた熱間工具鋼
JP3612459B2 (ja) * 1999-11-09 2005-01-19 山陽特殊製鋼株式会社 小ロット生産用金型鋼
JP2002088450A (ja) * 2000-09-14 2002-03-27 Daido Steel Co Ltd 熱間工具鋼
JP4812220B2 (ja) * 2002-05-10 2011-11-09 株式会社小松製作所 高硬度高靭性鋼
WO2005061747A1 (ja) * 2003-12-19 2005-07-07 Daido Steel Co.,Ltd 耐溶損性に優れた熱間工具鋼及び金型部材

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1850953A (en) * 1925-06-19 1932-03-22 Percy A E Armstrong Heat, rust, and acid resisting ferrous alloy
US4886640A (en) * 1988-08-22 1989-12-12 Carpenter Technology Corporation Hot work tool steel with good temper resistance

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2546374A1 (en) * 2010-03-08 2013-01-16 Villares Metals S/A Steel for extrusion tools
EP2546374A4 (en) * 2010-03-08 2015-02-18 Villares Metals Sa STEEL FOR EXTRUSION TOOLS

Also Published As

Publication number Publication date
JP5185923B2 (ja) 2013-04-17
SG170824A1 (en) 2011-05-30
EP2002025A1 (en) 2008-12-17
RU2430186C2 (ru) 2011-09-27
NZ570919A (en) 2011-07-29
RU2008136560A (ru) 2010-05-20
MX2008012631A (es) 2008-10-13
TWI355425B (en) 2012-01-01
SE0600797L (sv) 2007-10-07
AU2007232532B2 (en) 2011-06-02
WO2007114781A1 (en) 2007-10-11
SE529809C2 (sv) 2007-11-27
NO20084230L (no) 2008-10-30
CN101415854A (zh) 2009-04-22
JP2009532585A (ja) 2009-09-10
CA2659249A1 (en) 2007-10-11
AU2007232532A1 (en) 2007-10-11
KR20090010187A (ko) 2009-01-29
TW200741017A (en) 2007-11-01
BRPI0710268A2 (pt) 2011-08-09

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AS Assignment

Owner name: UDDEHOLM TOOLING AKTIEBOLAG, SWEDEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SANDBERG, ODD;KLARENFJORD, BENGT;REEL/FRAME:021586/0528;SIGNING DATES FROM 20080711 TO 20080812

AS Assignment

Owner name: UDDEHOLMS AB, SWEDEN

Free format text: CHANGE OF NAME;ASSIGNOR:UDDEHOLM TOOLING AKTIEBOLAG;REEL/FRAME:024933/0859

Effective date: 20100415

STCB Information on status: application discontinuation

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