WO1995025826A1 - Korrosions- und verschleissbeständiger hartguss - Google Patents
Korrosions- und verschleissbeständiger hartguss Download PDFInfo
- Publication number
- WO1995025826A1 WO1995025826A1 PCT/EP1995/000759 EP9500759W WO9525826A1 WO 1995025826 A1 WO1995025826 A1 WO 1995025826A1 EP 9500759 W EP9500759 W EP 9500759W WO 9525826 A1 WO9525826 A1 WO 9525826A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- corrosion
- cast iron
- wear
- carbides
- content
- Prior art date
Links
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
- C22C38/18—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
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
- C22C37/08—Cast-iron alloys containing chromium with nickel
Definitions
- C-containing hard cast iron based on Fe is state of the art.
- a cast of this grade is characterized by a C content of over 2.0% by weight. Examples of this are the materials No. 0.9630, No. 0.9635, No. 0.9645 and No. 0.9655. Due to the high consumption of Cr for carbide formation, these materials have no corrosion resistance beyond that of unalloyed cast iron.
- a typical representative of this group is the material GX 170 CrMo 25 2.
- a decisive disadvantage of this group of materials is that the corrosion resistance in chemically aggressive media, for example in acidic (pH 3), chloride-containing (50 g / 1 Cl) water from flue gas desulfurization plants , is only reached at very high Cr contents.
- corrosion-resistant stainless steels are used for the abovementioned aggressive media, the wear resistance of which can be easily improved by the addition of low carbon contents ( ⁇ 0.5%) and the resulting low volume fraction of carbides.
- a typical example of this is material 1.4464.
- the formation of chromium carbides reduces the chromium content of the basic structure and the corrosion resistance decreases accordingly. A further increase in the carbon content is therefore not advisable.
- One way to avoid chromium depletion of the matrix at higher carbon contents is to add other carbide-forming elements. This is practiced on steels with low chromium contents ( ⁇ 20%), which can be used with weakly corrosive media. An example of this is the
- the invention has for its object to provide a metallic casting material which is characterized by high corrosion resistance in aggressive media and which comes close to the commercially available chilled cast iron grades in its wear resistance.
- this cast material In addition to high corrosion and wear resistance, this cast material also has good castability, which enables it to be produced in conventional stainless steel foundries. This chilled cast iron is also easy to machine.
- Vanadium is an element of the fifth subgroup; its associated carbides are characterized by good wetting properties and less solubility than chromium carbide in Fe-based alloys. At the same time, the solubility in the liquidus state is higher than that of the niobium carbide, so that vanadium-rich carbides predominantly form only in a late stage of solidification or only in the solid state, as a result of which a spatially uniform distribution of the carbides is achieved without increases in gravity. This is a prerequisite for achieving good wear resistance. Furthermore, contrary to previous assumptions, it has been shown that vanadium-rich carbides as carriers of wear resistance are on a par with other special carbides. The vanadium-rich mixed carbides are also favorable from a mechanical point of view due to their shape and the resulting lower notch effect. Vanadium remaining in the matrix does not adversely affect the mechanical properties.
- the molybdenum content within the specified content limits is essential for corrosion resistance, especially in chloride-containing acidic media.
- the Cu content is limited to 3% by mass in order to reduce the risk of cracking when casting thick-walled parts.
- Low copper contents result in better corrosion resistance in oxidizing media and are therefore part of commercially available high-alloy duplex steels.
- Another advantage of the Cu content permissible in the material according to the invention is the possibility of using recycled material from commercially available, high-alloy cast steel when melting.
- the ratio of the phase fractions ferrite and austenite in the matrix can be set in a defined manner.
- the positive properties of a duplex structure in stainless steels are known.
- the extremely high brittleness of the hard cast grades with high C contents and a carbide network in a ferritic matrix is avoided by the predominant incorporation of the vanadium-rich carbides in the austenitic phase.
- the risk of cracking in the case of tensions between carbides and matrix is not as great as in the case of a purely ferritic matrix.
- heat treatment at normal solution annealing temperatures is necessary, and at the same time better machinability is achieved.
- niobium content is added to the chilled cast iron, so that
- niobium content is limited to a maximum of 4% by weight in order to avoid the precipitation of primary niobium carbides in the melt, since these strongly segregate due to their different density to the matrix.
- the material according to the invention shows due to the lower one
- Another advantage of this material is that, given the wear resistance, the corrosion resistance
- Variation of the alloying elements relevant to corrosion chemistry can be set according to the requirement profile, whereby it should be noted that with increasing alloy content the producibility (castability, machinability) becomes more difficult.
- the material according to the invention shows a clear superiority compared to the previously known chilled cast iron grades used for hydroabrasive wear.
- Fig. 1 is a diagram of the removal rates of the materials with hydroabrasive wear.
- Fig. 2 is a diagram of the corrosion rates in strongly acidic medium (pH 0.5; 10 g / 1 Cl -; 60 ° C).
- a model wear apparatus was used, in which quartz sand-water in a mixing ratio of 1: 1 with a grain size of 0.9-1.2 mm was used as an attack medium.
- the test duration was two hours each.
- a speed of 3000 1 / min was run.
- Each material sample had a diameter of 55 mm and a thickness of 5 mm.
- the ordinates of the diagrams shown in FIGS. 1 and 2 each show the removal in mm / a.
- the letters A to D are used to document known materials, which are described in more detail in a subsequent first table, while the identifications E (1) to E (3) relate to three variants of the material according to the invention, the composition of which is set out in a second table is.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Mold Materials And Core Materials (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Ceramic Products (AREA)
- Powder Metallurgy (AREA)
- Coating By Spraying Or Casting (AREA)
- Fuel Cell (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP95912186A EP0750686B1 (de) | 1994-03-18 | 1995-03-02 | Korrosions- und verschleissbeständiger hartguss |
AU19477/95A AU678107B2 (en) | 1994-03-18 | 1995-03-02 | Corrosion and wear-resistant chill casting |
DE59502510T DE59502510D1 (de) | 1994-03-18 | 1995-03-02 | Korrosions- und verschleissbeständiger hartguss |
BR9506610A BR9506610A (pt) | 1994-03-18 | 1995-03-02 | Material fundido duro resistente à corrosao e ao desgaste e seu emprego |
US08/716,391 US5795540A (en) | 1994-03-18 | 1995-03-02 | Corrosion and wear-resistant chill casting |
JP7524328A JPH10500449A (ja) | 1994-03-18 | 1995-03-02 | 耐食性及び耐摩耗性チル鋳物 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4409278A DE4409278A1 (de) | 1994-03-18 | 1994-03-18 | Korrosions- und verschleißbeständiger Hartguß |
DEP4409278.4 | 1994-03-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995025826A1 true WO1995025826A1 (de) | 1995-09-28 |
Family
ID=6513163
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1995/000759 WO1995025826A1 (de) | 1994-03-18 | 1995-03-02 | Korrosions- und verschleissbeständiger hartguss |
Country Status (10)
Country | Link |
---|---|
US (1) | US5795540A (de) |
EP (1) | EP0750686B1 (de) |
JP (1) | JPH10500449A (de) |
CN (1) | CN1044494C (de) |
AT (1) | ATE167238T1 (de) |
AU (1) | AU678107B2 (de) |
BR (1) | BR9506610A (de) |
DE (2) | DE4409278A1 (de) |
ES (1) | ES2120187T3 (de) |
WO (1) | WO1995025826A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020003854A1 (de) | 2020-06-26 | 2021-12-30 | KSB SE & Co. KGaA | Kreiselpumpe zur Förderung feststoffhaltiger Medien |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6004507A (en) * | 1997-08-11 | 1999-12-21 | Alphatech, Inc. | Material formulation for galvanizing equipment submerged in molten and aluminum zinc melts |
US6406563B2 (en) * | 1999-04-28 | 2002-06-18 | Yutaka Kawano | Stainless spheroidal carbide cast iron |
JP4216412B2 (ja) * | 1999-07-23 | 2009-01-28 | ジャパンマテックス株式会社 | パッキン材料およびそれを用いたパッキン |
US6511554B1 (en) * | 2001-07-05 | 2003-01-28 | Yutaka Kawano | Stainless spheroidal carbide cast iron material |
US9499889B2 (en) | 2014-02-24 | 2016-11-22 | Honeywell International Inc. | Stainless steel alloys, turbocharger turbine housings formed from the stainless steel alloys, and methods for manufacturing the same |
CN107574352A (zh) * | 2017-09-12 | 2018-01-12 | 江苏金利化工机械有限公司 | 一种可硬化的奥氏体合金 |
CN110273099A (zh) * | 2018-03-13 | 2019-09-24 | 自贡双源石化设备制造有限公司 | 喷射管用耐磨蚀合金、用途及制备的喷头、喷射管 |
CN109295382B (zh) * | 2018-10-22 | 2020-01-24 | 河南科技大学 | 一种高氮耐磨耐蚀合金及其制备方法 |
DE102020003847A1 (de) | 2020-06-26 | 2021-12-30 | KSB SE & Co. KGaA | Kreiselpumpe zur Förderung feststoffhaltiger Medien |
US11492690B2 (en) * | 2020-07-01 | 2022-11-08 | Garrett Transportation I Inc | Ferritic stainless steel alloys and turbocharger kinematic components formed from stainless steel alloys |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1303517B (de) * | 1964-10-28 | 1971-12-23 | Gebr Boehler & Co | |
JPH042744A (ja) * | 1990-04-19 | 1992-01-07 | Hitachi Metals Ltd | 高耐食高耐摩耗性工具部品材料 |
DE4202339A1 (de) * | 1991-01-29 | 1992-08-13 | Doerrenberg Edelstahl Gmbh | Korrosionsbestaendiger, hochverschleissfester, haertbarer stahl |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2297686A (en) * | 1940-07-30 | 1942-10-06 | Haynes Stellite Co | Chromium-vanadium-iron alloy cutting tool |
US2709132A (en) * | 1951-10-11 | 1955-05-24 | Latrobe Steel Co | Ferrous alloys and corrosion and wearresisting articles made therefrom |
US3086858A (en) * | 1960-07-22 | 1963-04-23 | West Coast Alloys Co | Hard cast alloy |
US3086859A (en) * | 1960-08-30 | 1963-04-23 | Du Pont | Columbium base alloys |
DE2738091A1 (de) * | 1977-08-24 | 1979-03-01 | Wahl Verschleiss Tech | Verbundgusskoerper und verfahren zu seiner herstellung |
DE2818734A1 (de) * | 1978-04-28 | 1979-10-31 | Wahl Verschleiss Tech | Beschussbestaendiger koerper |
US4200457A (en) * | 1979-01-22 | 1980-04-29 | Cape Arthur T | Ferrous base alloy for hard facing |
DE2922737C2 (de) * | 1979-06-05 | 1982-08-05 | Verschleiß-Technik Dr.-Ing. Hans Wahl GmbH & Co, 7302 Ostfildern | Verbundteil |
AU596351B2 (en) * | 1982-08-16 | 1990-05-03 | Wundowie Foundry Pty Ltd | Tillage points |
GB2158462B (en) * | 1983-10-24 | 1988-02-24 | Giw Ind Inc | Abrasive resistant white cast iron |
JPH0717984B2 (ja) * | 1986-10-21 | 1995-03-01 | 三菱マテリアル株式会社 | 耐摩耗性のすぐれた炭化物分散型Fe基焼結合金の製造法 |
KR940003890B1 (ko) * | 1989-08-04 | 1994-05-04 | 와맨 인터내셔날 리미티드 | 내식성 페로크롬(ferrochromium) 합금과 그 제조방법 |
-
1994
- 1994-03-18 DE DE4409278A patent/DE4409278A1/de not_active Withdrawn
-
1995
- 1995-03-02 WO PCT/EP1995/000759 patent/WO1995025826A1/de active IP Right Grant
- 1995-03-02 ES ES95912186T patent/ES2120187T3/es not_active Expired - Lifetime
- 1995-03-02 US US08/716,391 patent/US5795540A/en not_active Expired - Lifetime
- 1995-03-02 AU AU19477/95A patent/AU678107B2/en not_active Expired
- 1995-03-02 AT AT95912186T patent/ATE167238T1/de active
- 1995-03-02 DE DE59502510T patent/DE59502510D1/de not_active Expired - Lifetime
- 1995-03-02 EP EP95912186A patent/EP0750686B1/de not_active Expired - Lifetime
- 1995-03-02 CN CN95192063A patent/CN1044494C/zh not_active Expired - Lifetime
- 1995-03-02 BR BR9506610A patent/BR9506610A/pt not_active IP Right Cessation
- 1995-03-02 JP JP7524328A patent/JPH10500449A/ja active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1303517B (de) * | 1964-10-28 | 1971-12-23 | Gebr Boehler & Co | |
JPH042744A (ja) * | 1990-04-19 | 1992-01-07 | Hitachi Metals Ltd | 高耐食高耐摩耗性工具部品材料 |
DE4202339A1 (de) * | 1991-01-29 | 1992-08-13 | Doerrenberg Edelstahl Gmbh | Korrosionsbestaendiger, hochverschleissfester, haertbarer stahl |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020003854A1 (de) | 2020-06-26 | 2021-12-30 | KSB SE & Co. KGaA | Kreiselpumpe zur Förderung feststoffhaltiger Medien |
Also Published As
Publication number | Publication date |
---|---|
US5795540A (en) | 1998-08-18 |
DE4409278A1 (de) | 1995-09-21 |
EP0750686B1 (de) | 1998-06-10 |
AU1947795A (en) | 1995-10-09 |
JPH10500449A (ja) | 1998-01-13 |
EP0750686A1 (de) | 1997-01-02 |
ATE167238T1 (de) | 1998-06-15 |
AU678107B2 (en) | 1997-05-15 |
CN1044494C (zh) | 1999-08-04 |
BR9506610A (pt) | 1997-09-09 |
ES2120187T3 (es) | 1998-10-16 |
CN1143982A (zh) | 1997-02-26 |
DE59502510D1 (de) | 1998-07-16 |
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