NO134341B - - Google Patents
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- Publication number
- NO134341B NO134341B NO1522/73A NO152273A NO134341B NO 134341 B NO134341 B NO 134341B NO 1522/73 A NO1522/73 A NO 1522/73A NO 152273 A NO152273 A NO 152273A NO 134341 B NO134341 B NO 134341B
- Authority
- NO
- Norway
- Prior art keywords
- steel
- hot water
- chrome steel
- chrome
- content
- Prior art date
Links
- 229910000669 Chrome steel Inorganic materials 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 238000005260 corrosion Methods 0.000 claims description 10
- 230000007797 corrosion Effects 0.000 claims description 10
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000010936 titanium Substances 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 239000011733 molybdenum Substances 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/082—Heat exchange elements made from metals or metal alloys from steel or ferrous 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- 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.]
- Y10T428/12639—Adjacent, identical composition, components
- Y10T428/12646—Group VIII or IB metal-base
- Y10T428/12653—Fe, containing 0.01-1.7% carbon [i.e., steel]
Description
Ved konstruksjoner som kommer i berøring med varmt eller hett vann, slik som varmevekslere, spesielt varmtvannberedere og varmtvann- - beholdere, samt het- eller varmtvannsledninger og lignende, spiller korrosjonsmotstanden i materialet som anvendes i konstruksjonene en avgjørende rolle hva angår anleggets levetid. Av hensyn hertil har man hittil konstruert slike anlegg av kopper, stålplater som på innsiden er belagt med kopper, emaljert stålplate eller av høyverdig rustfritt krom-nikkel-stål. Ved de som regel nødvendige sveisinger ved fremstilling av eksempelvis beholdere eller ledninger utløses i de fleste stål strukturelle prosesser som nedsetter motstanden mot het- og.-varmtvann. På grunn herav velger man enten beskyttelses-.skikt eller spesielt høylegert stabilt stålmaterial. In the case of constructions that come into contact with warm or hot water, such as heat exchangers, especially water heaters and hot water containers, as well as hot or hot water pipes and the like, the corrosion resistance of the material used in the constructions plays a decisive role in terms of the life of the plant. In view of this, such facilities have so far been constructed of copper, steel plates which are coated on the inside with copper, enamelled steel plate or of high-grade stainless chrome-nickel steel. In the weldings that are usually necessary in the manufacture of, for example, containers or cables, structural processes are triggered in most steel that reduce the resistance to hot and hot water. Because of this, one chooses either a protective layer or a particularly high-alloy stable steel material.
I den senere tid har det også vært introdusert varmevekslere på markedet som består av rent kromstål hvor det til disse kromstål er tilsatt titan for å stabilisere deres struktur, dvs. for av-binding av karbon og nitrogen i form av utskilbare faser. Titan-tilsetningen skjer enten i henhold til reglene for støkiometrien eller i et bestemt forhold til karbon og nitrogen, hvorved antas at full stabilisering oppnås. In recent times, heat exchangers have also been introduced on the market that consist of pure chrome steel where titanium has been added to these chrome steels to stabilize their structure, i.e. to de-bond carbon and nitrogen in the form of separable phases. The titanium addition takes place either according to the rules of stoichiometry or in a specific ratio to carbon and nitrogen, by which it is assumed that full stabilization is achieved.
Det har vist seg at disse i og for seg billige kromstål ikke It has been shown that these inherently cheap chrome steels do not
besitter den nødvendige korrosjonsmotstand, spesielt på de steder hvor det utføres sveising, dvs. i sveisesømmen eller dens nærmeste omgivelse.' Her skjer det i de fleste tilfeller usedvanlig hurtige korrosjonsangrep og dermed driftsavbrudd i anlegget. possesses the necessary corrosion resistance, especially in the places where welding is carried out, i.e. in the weld seam or its immediate surroundings.' Here, in most cases, exceptionally rapid corrosion attacks occur and thus service interruptions in the plant.
Foreliggende oppfinnelse viser veien og angir midler for at varmevekslere og lignende, som ovenfor beskrevet, kan fremstilles av kromstål slik at kravet til lengst mulig levetid oppfylles. The present invention shows the way and indicates means for heat exchangers and the like, as described above, to be manufactured from chrome steel so that the requirement for the longest possible lifetime is met.
Oppfinnelsen går således ut på et rustfritt kromstål, spesielt The invention thus concerns a stainless chrome steel, in particular
for sveisede konstruksjoner som f.eks. varmevekslere e.i., med følgende generelle kjemiske sammensetninger: Kromstålet skal ha lavt karbon- og nitrogeninnhold, hvilket forbedrer bearbeidningsegenskapene. For oppnåelse av sveisbarhet stabiliseres kromstålet eksempelvis med titan, hvorved korrosjonsfastheten forbedres. Videre skal kromstålet inneholde molybden, hvilket i forbindelse med de lave innhold av karbon og nitrogen forhøyer bearbeidbarheten og eliminerer deres ulemper i de konvensjonelle kromstål, slik som sprøhet og korrosjon. for welded constructions such as e.g. heat exchangers e.i., with the following general chemical compositions: The chrome steel must have a low carbon and nitrogen content, which improves the processing properties. In order to achieve weldability, the chrome steel is stabilized, for example, with titanium, whereby the corrosion resistance is improved. Furthermore, the chrome steel must contain molybdenum, which in connection with the low content of carbon and nitrogen increases the machinability and eliminates their disadvantages in the conventional chrome steels, such as brittleness and corrosion.
For et stål som skal kunne sveises og som skal kunne være i kontakt med varmtvann uten å utsettes for korrosjon er det meget viktig at nitrogeninnholdet er under skarp kontroll. I stålet i henhold til oppfinnelsen er nitrogeninnholdet angitt å være maksimalt 0,03%, For a steel which must be able to be welded and which must be able to be in contact with hot water without being exposed to corrosion, it is very important that the nitrogen content is under strict control. In the steel according to the invention, the nitrogen content is stated to be a maximum of 0.03%,
noe som er av vesentlig betydning om stålet skal kunne motstå korrosjonsangrep i nærheten av sveisen, dvs. i det område rundt sveisen som under sveisingen er blitt varmepåvirket. which is of significant importance if the steel is to be able to resist corrosion attack in the vicinity of the weld, i.e. in the area around the weld which has been affected by heat during welding.
Det rustfrie kromstål i henhold til oppfinnelsen, spesielt beregnet for sveisede konstruksjoner som f.eks. varmtvannberedere, varmt-vannbeholdere, hetvanns- og varmtvannsledninger o.l., hvilket stål har høy korrosjonsfastbet, god bearbeidbarhet og en fullstendig stabilisert struktur, har i henhold til oppfinnelsen følgende sammensetning: The stainless chrome steel according to the invention, especially intended for welded constructions such as e.g. water heaters, hot water containers, hot water and hot water lines etc., which steel has a high corrosion resistance, good machinability and a completely stabilized structure, according to the invention has the following composition:
Som eksempler på varmevekslere fremstilt av kromstål i henhold til oppfinnelsen kan anføres følgende: En varmeveksler av vanlig konstruksjon ble fremstilt ved sveising av 2 mm tykke kaldvalsede plater med følgende kjemiske sammensetning av stålet: karbon - 0,028%, nitrogen - 0,025%, krom - 18,95%, nikkel - 0,35%, kopper - 0,06%, silisium - 0,5%, mangan - 0,48% samt molybden - 2,44%, og titan - 0,64%. The following can be cited as examples of heat exchangers made from chrome steel according to the invention: A heat exchanger of ordinary construction was made by welding 2 mm thick cold-rolled plates with the following chemical composition of the steel: carbon - 0.028%, nitrogen - 0.025%, chromium - 18 .95%, nickel - 0.35%, copper - 0.06%, silicon - 0.5%, manganese - 0.48% and molybdenum - 2.44%, and titanium - 0.64%.
Andre varmevekslere og hetvannsledninger ble fremstilt av kromstål med følgende sammensetning: Other heat exchangers and hot water lines were manufactured from chrome steel with the following composition:
Disse varmevekslere og ledninger var lett å bearbeide og sveise, og viste intet korrosjonsangrep selv etter lang tids drifts. These heat exchangers and lines were easy to machine and weld, and showed no corrosion attack even after a long period of operation.
Claims (6)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE7214126 | 1972-04-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
NO134341B true NO134341B (en) | 1976-06-14 |
NO134341C NO134341C (en) | 1976-09-22 |
Family
ID=6629636
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO1522/73A NO134341C (en) | 1972-04-14 | 1973-04-12 |
Country Status (9)
Country | Link |
---|---|
US (1) | US3890143A (en) |
JP (1) | JPS4947211A (en) |
AT (1) | AT341561B (en) |
CA (1) | CA1007899A (en) |
CH (1) | CH601763A5 (en) |
DK (1) | DK143202C (en) |
FR (1) | FR2180117B1 (en) |
GB (1) | GB1383164A (en) |
NO (1) | NO134341C (en) |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4078919A (en) * | 1973-11-21 | 1978-03-14 | Nippon Steel Corporation | Ferritic stainless steel having excellent workability and high toughness |
JPS5188413A (en) * | 1975-02-01 | 1976-08-03 | Kotaishokuseifueraitosutenresuko | |
US4010049A (en) * | 1975-10-06 | 1977-03-01 | Jones & Laughlin Steel Corporation | Columbium-stabilized high chromium ferritic stainless steels containing zirconium |
AT360061B (en) * | 1976-01-13 | 1980-12-29 | Graenges Nyby Ab | METHOD FOR PRODUCING STABILIZED, FERRITIC, STAINLESS STEEL CHROME STEELS |
US4055416A (en) * | 1976-01-21 | 1977-10-25 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Tantalum modified ferritic iron base alloys |
DE2701329C2 (en) * | 1977-01-14 | 1983-03-24 | Thyssen Edelstahlwerke AG, 4000 Düsseldorf | Corrosion-resistant ferritic chrome-molybdenum-nickel steel |
US4159034A (en) * | 1977-05-12 | 1979-06-26 | Modine Manufacturing Company | Weldment heat exchanger |
EP0020793B1 (en) * | 1979-06-08 | 1984-12-12 | Henrik Giflo | High-strength stainless steel, well suited for polishing and resistant to acids |
US4294613A (en) | 1979-07-03 | 1981-10-13 | Henrik Giflo | Acid resistant, high-strength steel suitable for polishing |
US4286986A (en) * | 1979-08-01 | 1981-09-01 | Allegheny Ludlum Steel Corporation | Ferritic stainless steel and processing therefor |
US4261739A (en) * | 1979-08-06 | 1981-04-14 | Armco Inc. | Ferritic steel alloy with improved high temperature properties |
SE436576C (en) * | 1980-01-03 | 1986-12-23 | Allegheny Ludlum Steel | FERRITIC STAINLESS STEEL AND APPLICATION OF CAP |
SE436577B (en) * | 1980-01-03 | 1985-01-07 | Allegheny Ludlum Steel | FERRITIC STAINLESS STEEL AND APPLICATION OF CAP |
JPS56123356A (en) * | 1980-03-01 | 1981-09-28 | Nippon Steel Corp | Ferritic stainless steel with superior formability |
JPS56160428U (en) * | 1980-04-30 | 1981-11-30 | ||
JPS6028968Y2 (en) * | 1980-04-30 | 1985-09-03 | 富士通株式会社 | Output direct selection type interface circuit |
EP0057316B1 (en) * | 1981-01-16 | 1985-04-03 | Allegheny Ludlum Steel Corporation | Low interstitial, corrosion resistant, weldable ferritic stainless steel and process for the manufacture thereof |
FR2565998B1 (en) * | 1984-06-14 | 1993-01-08 | Stein Industrie | METHOD OF MELT WELDING WITH METAL ARC SUPPLY GAS INERTA OF FERRITIC STAINLESS STEEL |
NZ219394A (en) * | 1986-02-25 | 1989-05-29 | Wlpu Holdings Pty Ltd | Expanded metal sheet splash packing for evaporative cooler |
DE4213172C1 (en) * | 1992-04-22 | 1993-05-19 | B. Braun Melsungen Ag, 3508 Melsungen, De | |
US5372752A (en) * | 1993-06-23 | 1994-12-13 | T. C. Watermeyer Group, Inc. | Packing elements, a pack, a method of constructing a pack, and a method for installing a packing in an evaporative cooler |
US5460755A (en) * | 1993-06-23 | 1995-10-24 | T. C. Watermeyer Group, Inc. | Packing elements, a pack, a method of constructing a pack, and a method for installing a packing in an evaporative cooler |
EP0658736B1 (en) * | 1993-12-14 | 1997-03-26 | Abb Sunrod Ab | Heat exchanger with finned tubes |
US6941064B2 (en) * | 2001-04-05 | 2005-09-06 | Sherwood-Templeton Coal Company, Inc. | Heater for vacuum cleaners |
US6873793B2 (en) * | 2001-04-05 | 2005-03-29 | Sherwood-Templeton Coal Company, Inc. | Electric water heater |
WO2008124475A1 (en) * | 2007-04-03 | 2008-10-16 | Global Heating Solutions, Inc. | Spa having heat pump system |
CN104858616A (en) * | 2014-02-26 | 2015-08-26 | 鞍钢股份有限公司 | Manufacturing method of A4Cr5MoSiV1 high-alloy core rod |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2905577A (en) * | 1956-01-05 | 1959-09-22 | Birmingham Small Arms Co Ltd | Creep resistant chromium steel |
US3251683A (en) * | 1962-01-16 | 1966-05-17 | Allegheny Ludlum Steel | Martensitic steel |
US3490956A (en) * | 1965-06-03 | 1970-01-20 | Allegheny Ludlum Steel | Method of producing ferritic stainless steel |
FR1480166A (en) * | 1966-02-16 | 1967-05-12 | Allegheny Ludlum Steel | Stainless steel hot water tank |
US3762913A (en) * | 1967-01-17 | 1973-10-02 | Westinghouse Electric Corp | Alloy and method of welding structures including this alloy |
US3585009A (en) * | 1967-06-08 | 1971-06-15 | Suwa Seikosha Kk | Case for watches |
US3574601A (en) * | 1968-11-27 | 1971-04-13 | Carpenter Technology Corp | Corrosion resistant alloy |
US3759705A (en) * | 1971-06-10 | 1973-09-18 | Armco Steel Corp | Chromium containing alloy steel and articles |
-
1973
- 1973-04-12 US US350655A patent/US3890143A/en not_active Expired - Lifetime
- 1973-04-12 AT AT324373A patent/AT341561B/en not_active IP Right Cessation
- 1973-04-12 DK DK198873A patent/DK143202C/en active
- 1973-04-12 NO NO1522/73A patent/NO134341C/no unknown
- 1973-04-13 FR FR7313583A patent/FR2180117B1/fr not_active Expired
- 1973-04-13 CH CH536573A patent/CH601763A5/xx not_active IP Right Cessation
- 1973-04-14 JP JP48042623A patent/JPS4947211A/ja active Pending
- 1973-04-16 CA CA168,866A patent/CA1007899A/en not_active Expired
- 1973-04-16 GB GB1828473A patent/GB1383164A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DK143202C (en) | 1981-11-23 |
GB1383164A (en) | 1975-02-05 |
ATA324373A (en) | 1977-06-15 |
JPS4947211A (en) | 1974-05-07 |
FR2180117B1 (en) | 1976-05-07 |
NO134341C (en) | 1976-09-22 |
AT341561B (en) | 1978-02-10 |
FR2180117A1 (en) | 1973-11-23 |
DK143202B (en) | 1981-07-20 |
CH601763A5 (en) | 1978-07-14 |
CA1007899A (en) | 1977-04-05 |
US3890143A (en) | 1975-06-17 |
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