SE528132C2 - Method of joining dispersion-curing alloy - Google Patents

Method of joining dispersion-curing alloy

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Publication number
SE528132C2
SE528132C2 SE0401139A SE0401139A SE528132C2 SE 528132 C2 SE528132 C2 SE 528132C2 SE 0401139 A SE0401139 A SE 0401139A SE 0401139 A SE0401139 A SE 0401139A SE 528132 C2 SE528132 C2 SE 528132C2
Authority
SE
Sweden
Prior art keywords
dispersion
joining
joint
cross
structural
Prior art date
Application number
SE0401139A
Other languages
Swedish (sv)
Other versions
SE0401139D0 (en
SE0401139L (en
Inventor
Claes Oehngren
Original Assignee
Sandvik Intellectual Property
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 Sandvik Intellectual Property filed Critical Sandvik Intellectual Property
Priority to SE0401139A priority Critical patent/SE528132C2/en
Publication of SE0401139D0 publication Critical patent/SE0401139D0/en
Priority to EP05736065A priority patent/EP1744854A1/en
Priority to CNA2005800137022A priority patent/CN1950171A/en
Priority to KR1020067022670A priority patent/KR20070005711A/en
Priority to JP2007510651A priority patent/JP2007535409A/en
Priority to US11/587,967 priority patent/US20080141616A1/en
Priority to PCT/SE2005/000572 priority patent/WO2005105362A1/en
Publication of SE0401139L publication Critical patent/SE0401139L/en
Publication of SE528132C2 publication Critical patent/SE528132C2/en

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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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
    • B23K33/004—Filling of continuous seams
    • B23K33/006—Filling of continuous seams for cylindrical workpieces
    • 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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/13—Modifying the physical properties of iron or steel by deformation by hot working
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/34—Preliminary treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/24—Preliminary treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/06—Tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B23K2103/04—Steel or steel alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B23K2103/04—Steel or steel alloys
    • B23K2103/05—Stainless steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded

Abstract

The present invention relates to a method for joining two or more components and/or construction parts, at least one of which consists of a dispersion-strengthened alloy having the following composition (in % by weight): C up to 0.08 Si up to 0.7 Cr 10-25 Al 1-10 Mo 1.5-5 Mn up to 0.4 balance Fe as well as normally occurring impurities by the fact that the cross section in the joint is enlarged by forging before joining and where the product manufactured according to the method can be used in high-temperature applications at temperatures above 900° C.

Description

i 0 Iain nu 00 00 n c o J 0 O Inc c 0 o o o u 000 000 00 OI 10 15 20 25 30 528 132 ökade krav på nämnda rörs livslängd tillkommit. Det skulle även vara önskvärt att kunna tillverka längre rör som motstår den höga temperaturen under längre tid än hittills kända rör. i 0 Iain nu 00 00 n c o J 0 O Inc c 0 o o o u u 000 000 00 OI 10 15 20 25 30 528 132 increased requirements for the life of the said pipe have been added. It would also be desirable to be able to manufacture longer pipes that withstand the high temperature for a longer time than hitherto known pipes.

Den svenska patentansökan nr 0301500-5 beskriver strålningsrör i en krackerugn, där kolväten krackas till eten i ett rör genom vilket kolväten strömmar, vilket är uppvärmt utifrån till en temperatur vid vilken krackning av kolväten inträffar, och utmärks av, att röret är utfört i ett FeCrAl - material innehållande förutom Fe, 10 - 25 vikt-% Cr, 1 - 10 vikt-% Al och 1,5 - 5 vikt-% Mo samt en mindre mängd lege- ringsämnen.Swedish patent application No. 0301500-5 describes radiation tubes in a cracking furnace, where hydrocarbons are cracked to ethylene in a tube through which hydrocarbons flow, which is heated from the outside to a temperature at which cracking of hydrocarbons occurs, and is characterized in that the tube is made in a FeCrAl - materials containing in addition to Fe, 10 - 25 wt.% Cr, 1 - 10 wt.% Al and 1.5 - 5 wt.% Mo and a small amount of alloying substances.

Dispersionshärdande legerlngar används mestadels i applikationer där temperatu- rer upp till 1200°C uppträder. Detta i kombination med konstruktionspriciper som kräver långa, hängande rör ställer speciella krav på svetsar respektive samman- fogningar av rören. Konstruktionen optimeras med hänseende till väggtjockleken.Dispersion-hardening alloys are mostly used in applications where temperatures up to 1200 ° C occur. This, in combination with design principles that require long, hanging pipes, places special demands on welds and joints of the pipes, respectively. The construction is optimized with regard to the wall thickness.

De avgörande faktorerna är livslängden och en maximal värmeöverföring utifrån röret, som gynnas av tunnare rör och högre hållfasthet. Rörets styrka måste väljas så att åtminstone egenlasten bärs upp. En konstruktionsdel kan typiskt vara upp till 10 till 17 meter lång och kan exempelvis bestå av två eller flera sammansvetsade delar t.ex. rör.The decisive factors are the service life and a maximum heat transfer from the pipe, which benefits from thinner pipes and higher strength. The strength of the pipe must be chosen so that at least the self-load is supported. A structural part can typically be up to 10 to 17 meters long and can for example consist of two or fl your welded parts e.g. pipe.

Vid sammanfogning av en eller flera komponenter eller konstruktionsdelar där åtminstone en av delarna är en dispersionshärdande legering, uppträder breda zoner med utskiljningar av t.ex. nitrider och/eller större oxidkluster, som leder till en avsevärd försvagning av konstruktionen vid sagda svetsar respektive fogningar.When joining one or more components or structural parts where at least one of the parts is a dispersion-hardening alloy, wide zones appear with precipitations of e.g. nitrides and / or larger oxide clusters, which lead to a considerable weakening of the structure at said welds and joints, respectively.

Denna försvagning innebär att fogen i det dispersionshärdande materialet vid viss kombination av temperatur och last inte uppfyller hållfasthetskriterlerna för kon- struktionen. Egenvikten är i många konstruktioner där dispersionshärdande materi- al används den största lasten på fogen. Därför är det inte möjligt att öka vägg- tjockleken på hela röret för att klara designkriterier i fogen eftersom lasten då ökar. Även ur kostnadssynpunkt och värmeöverföringssynpunkt är det ej önskvärt att använda grövre vägg än vid konventionell design av rörkonstruktionen.This weakening means that the joint in the dispersion-curing material at a certain combination of temperature and load does not meet the strength criteria for the construction. The dead weight is in many constructions where dispersion-curing material is used the largest load on the joint. Therefore, it is not possible to increase the wall thickness of the entire pipe to meet design criteria in the joint as the load then increases. Also from a cost and heat transfer point of view, it is not desirable to use a coarser wall than with conventional design of the pipe construction.

I syfte att sammanfoga konstruktionsdelar av där en eller båda delarna består av en dispersionshärdande legering sjunker den mekaniska hållfastheten i fogen till 15 20 528 132 hälften jämfört med grundmaterialet som följd av den nödvändiga uppvärmningen.In order to join structural parts of which one or both parts consist of a dispersion hardening alloy, the mechanical strength of the joint drops to half compared to the base material due to the necessary heating.

Det medför att svetsar, sammanfogningar eller dylikt bildar potentiella brottanvis- ningar.This means that welds, joints or the like form potential breaking instructions.

Sammanfattning av uppfinningen Det är därför ett syfte med föreliggande uppfinning att tillhandahålla en metod för sammanfogning av komponenter varav åtminstone en består av en dispersions- härdande legering där de ovan beskrivna nackdelarna kan elimineras och kon- struktionen optimeras.SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a method for joining components, at least one of which consists of a dispersion-curing alloy where the above-described disadvantages can be eliminated and the construction optimized.

Detaljerad beskrivning av uppfinningen Föreliggande uppfinning tillhandahåller en metod för sammanfogning av konstruk- tionsdelar där ett eller båda delarna består av en dispersionshärdande legering genom att kombinera känd fogningsteknik med tvärsnittsförstoring av fogområdet i syfte att förhöja hâllfastheten i fog- respektive svetsområdet till ett sådant belopp att lasten bärs upp av röret.Detailed Description of the Invention The present invention provides a method of joining structural members where one or both members consist of a dispersion hardening alloy by combining known joint techniques with cross-sectional enlargement of the joint area in order to increase the strength of the joint and weld area to such a load. carried by the tube.

Föreliggande uppfinning tillhandahåller en metod för sammanfogning av konstruk- tionsdelar där ett eller båda delarna består av en dispersionshärdande legering genom tvärsnittsförstoring av fogområdet före sammanfogningen i syfte att förhöja hâllfastheten i fog- respektive svetsområdet till ett sådant belopp att lasten bärs upp av röret och konstruktionsdelens anvädning i högtemperaturapplikationer.The present invention provides a method for joining structural members where one or both members consist of a dispersion hardening alloy by cross-sectionally enlarging the joint area prior to joining in order to increase the strength of the joint and weld area to such an amount that the load is supported by the pipe and structural member. in high temperature applications.

Den dispersionshärdande legering som används i metoden enligt föreliggande uppfinning har en sammansättning enligt följande (i vikt-%): C upp till 0.08 Si upp till 0,7 Cr 10 - 25 Al 1 - 10 Mo 1,5 - 5 Mn upp till 0,4 rest Fe samt normalt förekommande föroreningar. 20 25 528 132 Det är föredraget att materialet innehåller mindre fraktioner av ett eller flera av legeringsämnena hafnium. zirkonium, yttrium, kväve, kol och syre.The dispersion hardening alloy used in the method of the present invention has a composition as follows (in% by weight): C up to 0.08 Si up to 0.7 Cr 10 - 25 Al 1 - 10 Mo 1.5 - 5 Mn up to 0 , 4 residues Fe and normally occurring contaminants. It is preferred that the material contain smaller fractions of one or more of the alloying elements hafnium. zirconium, yttrium, nitrogen, carbon and oxygen.

Föreliggande uppfinning kan varieras med avseende på materialkompositionen framför allt avseende legeringsämnen som har låg halt i materialet.The present invention can be varied with respect to the material composition, especially with respect to alloying elements which have a low content in the material.

För att kunna använda en dispersionshärdande legering skall konstruktionsdelens, väggtjocklek ökas endast vid fogområdet. Ingen kännbar ökning i egenvikt uppstår och värmeöverföringen blir inte förändrad jämfört med konventionell design.In order to be able to use a dispersion-hardening alloy, the wall thickness of the construction part must be increased only at the joint area. No noticeable increase in dead weight occurs and the heat transfer is not changed compared to conventional design.

Lasten som fogen känner av beräknas enligt ekvation 1.The load sensed by the joint is calculated according to equation 1.

Ekvation (1) o = F/A o= Spänning [MPa] F= Kraft [N] A= Tvärsnittsarea [mmz] Om kraften F ger krypbrottsdesignkriteriet ob för fogen t.ex. o., = 4 MPa vid 1100°Cl100 000 timmar och styrkan i den dispersionshärdande fogen är o = 2 MPa kan materialet ej användas vid konventionell design av fogen.Equation (1) o = F / A o = Voltage [MPa] F = Force [N] A = Cross-sectional area [mmz] If the force F gives the creep rupture design criterion ob for the joint e.g. o., = 4 MPa at 1100 ° Cl100 000 hours and the strength of the dispersion hardening joint is o = 2 MPa, the material can not be used in conventional design of the joint.

Används däremot ökning av väggtjockleken vid fogområdet där A ökas med t.ex. faktor 2 ger kraften F, som är oförändrad, en minskning av krypbrottsdesignkriteriet med faktor 2. I fallet ovan innebär detta att krypbrottsdesignkriteriet minskas från o., = 4 MPa till or, = 2 MPa och styrkan i fogen där en eller båda delarna består av en dispersionshärdande legering därmed klarar designkriteriet.On the other hand, an increase in the wall thickness is used at the joint area where A is increased by e.g. factor 2 gives the force F, which is unchanged, a reduction of the creep rupture design criterion by factor 2. In the case above, this means that the creep rupture design criterion is reduced from o., = 4 MPa to or, = 2 MPa and the strength of the joint where one or both a dispersion hardening alloy thus meets the design criterion.

Ekvation (1) ger i fallet konventionell design följande ob: 10 15 20 25 30 528 |== P1 [N] A= A1 [mm21 EkVaÜOfl (1)_) Gb = F1/Å1 Ekvation (1) ger i fallet med ökning av väggtjocklek då A ökas med faktor 2 gente- mot konventionell design: i== P1 [N] A= 2A1 [mmz] Ekvation (1)9 ot, = F1/2A1 Den önskade ökning av väggtjockleken för sagda konstruktionsdelarna som skall sammanfogas kan åstadkommas med flera tillverkningsmetoder såsom uppsmid- ning, HIP-ning och svarvning. I högtemperatur applikationer där konstruktionsde- larna av ovan beskrivet material används överstiger rörlângden ofta 6 meter. Det medför att uppsmidning är den mest kostnadseffektiva metoden för att sammanfo- ga eller svetsa rör till önskad konstruktion och/eller längd.Equation (1) in the case of conventional design gives the following ob: 10 15 20 25 30 528 | == P1 [N] A = A1 [mm21 EkVaÜO fl (1) _) Gb = F1 / Å1 Equation (1) gives in the case of increase of wall thickness when A is increased by a factor of 2 against conventional design: i == P1 [N] A = 2A1 [mmz] Equation (1) 9 ot, = F1 / 2A1 The desired increase in wall thickness for said structural parts to be joined can be achieved with several manufacturing methods such as forging, HIP forging and turning. In high temperature applications where the construction parts of the material described above are used, the pipe length often exceeds 6 meters. This means that forging is the most cost-effective method for joining or welding pipes to the desired construction and / or length.

Rörets geometri vid den fogen med ökad väggtjocklek påverkar således inte strömningsegenskaperna i processen märkbart, varken utanpå eller inuti röret.The geometry of the pipe at the joint with increased wall thickness thus does not appreciably affect the flow properties in the process, neither on the outside nor inside the pipe.

Av praktiska skäl skall väggförtjockning ha en utsträckning i konstruktionsdelens, respektive rörets Iängsaxel på minst 30 mm. Tvärsnittet skall ökas med ett belopp som motsvarar åtminstone den lastsänkningen som eftersträvas, dvs tvärsnittsök- ningen står i ett omvänt proportionellt förhållande till lasten enligt ekvationen ovan.For practical reasons, wall thickening shall have an extension in the longitudinal axis of the construction part and the pipe, respectively, of at least 30 mm. The cross-section shall be increased by an amount corresponding to at least the load reduction sought, ie the cross-sectional increase is in an inversely proportional relationship to the load according to the equation above.

Metoden enligt föreliggande uppfinning uppvisar även fördelen att en eller flera konstruktionsdelar av dispersionshärdande och/eller andra material, såsom t.ex. rostfritt stål kan sammanfogas.The method according to the present invention also has the advantage that one or more construction parts of dispersion-curing and / or other materials, such as e.g. stainless steel can be joined.

Metoden enligt föreliggande uppfinning uppvisar fördelen att kunna använda sig av konventionella metoder såsom t.ex. konventionell svetsning som TIG för att sam- 10 15 20 C 25 30 i 528 152 manfoga de uppsmidda konstruktionsdelarna, vilket är en väsentlig faktor i kon- struktions- och montagehänseende.The method according to the present invention has the advantage of being able to use conventional methods such as e.g. conventional welding such as TIG to join the forged structural parts together, which is an essential factor in terms of construction and assembly.

Ett möjligt användningsområde för rör sammanfogade med metoden enligt förelig- gande uppfinning är så kallade strålningsrör i krackerugnar. l krackerugnar eller etenugnar krackas kolväten till eten, H2C = H20, vilket utgör en råvara för plastindustrin.A possible area of use for pipes joined together with the method according to the present invention is so-called radiation pipes in cracking furnaces. In cracking furnaces or ethylene furnaces, hydrocarbons are cracked into ethylene, H2C = H2O, which is a raw material for the plastics industry.

Strålningsrör förefinns i en krackerugn, där kolväten krackas till eten i ett rör genom vilket kolväten strömmar. Krackningen sker genom att kolväten leds genom ett strålningsrör vilket upphettats medelst omgivande brännare till tillräckligt hög temperatur vid vilken krackning inträffar, exempelvis omkring 1100 °C, för att eten skall bildas i röret. Typiskt är rörets temperatur vid inloppsänden för gasen 900 °C och vid utloppsänden ca 1125 °C och upp till 1200°C.Radiation tubes are placed in a cracking furnace, where hydrocarbons are cracked into ethylene in a tube through which hydrocarbons flow. The cracking takes place by hydrocarbons being passed through a radiation tube which has been heated by means of ambient burners to a sufficiently high temperature at which cracking occurs, for example about 1100 ° C, in order for ethylene to be formed in the tube. Typically, the temperature of the pipe at the inlet end of the gas is 900 ° C and at the outlet end about 1125 ° C and up to 1200 ° C.

Claims (1)

1. 0 15 20 25 528 152 Patentkrav . Metod för sammanfogning av en eller flera konstruktionsdelar medelst svetsning, varvid åtminstone en av delama består av en dispersionshärdande legering, k ä n n e t e c k n a d av att tvärsnitteti fogen ökas genom uppsmidning före sammanfogning. . Metod för sammanfogning av en eller flera konstruktionsdelar enligt krav 1, varvid åtminstone en av delama består av en dispersionshärdande legering som har en sammansättning enligt följande (i vikt-%): C upp till 0,08 Si upp till 0,7 Cr 10-25 Al 1-10 Mo 1,5-5 Mn upp till 0,4 rest Fe samt normalt förekommande föroreningar. . Konstruktionsdel tillverkad enligt metod enligt krav 1 och 2 för användning i högtemperaturapplikationer vid temperaturer över 900 °C. . Konstruktionsdel tillverkad enligt metod enligt krav 1 och 2 för användning i krackerugnar. . Konstruktionsdel tillverkad enligt metod enligt krav 1 och 2 där krypbrottsdesignkriteriet o = F1/A1 ifogen ökas genom tvärsnittsökning.1 0 15 20 25 528 152 Patent claims. Method for joining one or more structural parts by welding, wherein at least one of the parts consists of a dispersion-hardening alloy, characterized in that the cross-sectional joint is increased by forging before joining. . A method of joining one or more structural members according to claim 1, wherein at least one of the members consists of a dispersion hardening alloy having a composition as follows (in% by weight): C up to 0.08 Si up to 0.7 Cr 25 Al 1-10 Mo 1.5-5 Mn up to 0.4 residual Fe and normally occurring impurities. . Construction part manufactured according to the method according to claims 1 and 2 for use in high temperature applications at temperatures above 900 ° C. . Construction part manufactured according to the method according to claims 1 and 2 for use in cracking furnaces. . Structural part manufactured according to the method according to claims 1 and 2, where the creep fracture design criterion o = F1 / A1 in the joint is increased by cross-sectional increase.
SE0401139A 2004-04-30 2004-04-30 Method of joining dispersion-curing alloy SE528132C2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
SE0401139A SE528132C2 (en) 2004-04-30 2004-04-30 Method of joining dispersion-curing alloy
EP05736065A EP1744854A1 (en) 2004-04-30 2005-04-20 Method for joining dispersion-strengthened alloy
CNA2005800137022A CN1950171A (en) 2004-04-30 2005-04-20 Method for joining dispersion-strengthened alloy
KR1020067022670A KR20070005711A (en) 2004-04-30 2005-04-20 Method for joining dispersion-strengthened alloy
JP2007510651A JP2007535409A (en) 2004-04-30 2005-04-20 Dispersion strengthened alloy joining method
US11/587,967 US20080141616A1 (en) 2004-04-30 2005-04-20 Method for Joining Dispersion-Strengthened Alloy
PCT/SE2005/000572 WO2005105362A1 (en) 2004-04-30 2005-04-20 Method for joining dispersion-strengthened alloy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0401139A SE528132C2 (en) 2004-04-30 2004-04-30 Method of joining dispersion-curing alloy

Publications (3)

Publication Number Publication Date
SE0401139D0 SE0401139D0 (en) 2004-04-30
SE0401139L SE0401139L (en) 2005-10-31
SE528132C2 true SE528132C2 (en) 2006-09-12

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SE0401139A SE528132C2 (en) 2004-04-30 2004-04-30 Method of joining dispersion-curing alloy

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US (1) US20080141616A1 (en)
EP (1) EP1744854A1 (en)
JP (1) JP2007535409A (en)
KR (1) KR20070005711A (en)
CN (1) CN1950171A (en)
SE (1) SE528132C2 (en)
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US10480332B2 (en) 2014-12-10 2019-11-19 General Electric Company Rotors and methods of making the same
US10260370B2 (en) 2014-12-10 2019-04-16 General Electric Company Nanostructured ferritic alloy components and related articles
ES2938132B2 (en) * 2021-10-04 2023-09-26 Mecanizacion Ind Astillero S A Method for optimizing the roughness of a rolling cylinder using high-speed thermal spraying

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US3572777A (en) * 1969-05-05 1971-03-30 Armco Steel Corp Multiple seal, double shoulder joint for tubular products
JPH09257167A (en) * 1996-03-19 1997-09-30 Daiwa House Ind Co Ltd Structure of joint part of piping and its manufacture
SE508595C2 (en) * 1997-08-12 1998-10-19 Sandvik Ab Use of a ferritic Fe-Cr-Al alloy in the manufacture of compound tubes, as well as compound tubes and the use of the tubes
JPH11209850A (en) * 1998-01-23 1999-08-03 Jgc Corp Heating furnace tube, and use of heating furnace tube
SE0000002L (en) * 2000-01-01 2000-12-11 Sandvik Ab Process for manufacturing a FeCrAl material and such a mortar
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US20080141616A1 (en) 2008-06-19
KR20070005711A (en) 2007-01-10
CN1950171A (en) 2007-04-18
SE0401139D0 (en) 2004-04-30
EP1744854A1 (en) 2007-01-24
SE0401139L (en) 2005-10-31
JP2007535409A (en) 2007-12-06
WO2005105362A1 (en) 2005-11-10

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