WO2012070524A1 - 溶接金属及びサブマージアーク溶接方法 - Google Patents
溶接金属及びサブマージアーク溶接方法 Download PDFInfo
- Publication number
- WO2012070524A1 WO2012070524A1 PCT/JP2011/076791 JP2011076791W WO2012070524A1 WO 2012070524 A1 WO2012070524 A1 WO 2012070524A1 JP 2011076791 W JP2011076791 W JP 2011076791W WO 2012070524 A1 WO2012070524 A1 WO 2012070524A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mass
- less
- weld metal
- welding
- toughness
- Prior art date
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/011—Layered products comprising a layer of metal all layers being exclusively metallic all layers being formed of iron alloys or steels
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0222—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in soldering, brazing
- B23K35/0244—Powders, particles or spheres; Preforms made therefrom
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
- B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
-
- 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
- B23K9/18—Submerged-arc welding
- B23K9/186—Submerged-arc welding making use of a consumable electrodes
-
- 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
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
-
- 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
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
-
- 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
-
- 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
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
-
- 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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
Definitions
- the present invention is used for welding high-strength Cr—Mo steel (Cr: 2.00-3.25, Mo: 0.90-1.20), and in particular, in addition to Cr and Mo, V is an essential component. Further, the present invention relates to a high strength Cr—Mo steel weld metal and a submerged arc welding method effective for welding high strength Cr—Mo steel containing Nb, Ti, B, and Ca as required.
- Cr—Mo steel containing 2.25 to 3% by mass of Cr and 1% by mass of Mo is excellent in high temperature characteristics, it has been conventionally used as a material used in high temperature and high pressure environments such as boilers and chemical reaction vessels. Widely used. Many of these structures are large and thick, and submerged arc welding with high welding efficiency is mainly used for the welding. In addition, in order to achieve high-efficiency operation of the equipment, the welding conditions tend to be higher at higher temperatures and pressures. Therefore, when conventional steel is used, the welded structure becomes even thicker and impractical. Therefore, high strength Cr—Mo steel added with V or high strength Cr—Mo steel added with V, Nb or the like has been put into practical use in order to suppress the thickening of the structure even under high temperature and high pressure conditions. .
- Patent Documents 1 and 2 a submerged arc welding method is proposed in which a weld metal having the above-described performance is obtained.
- JP-A-6-328292 Japanese Patent Laid-Open No. 9-192881
- the present invention has been made in view of such a problem, and is a high-strength Cr—Mo steel weld metal having excellent toughness and excellent SR resistance, and a submerged arc for obtaining the weld metal.
- An object is to provide a welding method.
- the first weld metal according to the present invention is a weld metal welded by submerged arc welding.
- C 0.05 to 0.15% by mass
- Si 0.10 to 0.25% by mass
- Mn 0.50 to 1.30% by mass
- Cr 2.00 to 3.25% by mass
- Mo 0.90 to 1.20 mass%
- V 0.20 to 0.40 mass%
- Nb 0.010 to 0.040 mass%
- O 250 to 450 ppm
- P 0.010 mass% or less
- S, Sn, Sb As: 0.010 mass% or less in total amount
- Bi Pb: 1.0 ppm or less in total amount
- the balance is Fe and inevitable impurities
- the second weld metal according to the present invention is: C: 0.09 to 0.19% by mass, Si: 0.30 mass% or less, Mn: 0.50 to 1.40% by mass, Cr: 2.00 to 3.80 mass%, Mo: 0.90 to 1.20 mass%, V: 0.25 to 0.45 mass%, Nb: 0.010 to 0.040 mass%,
- the balance a welding wire having a composition that is Fe and inevitable impurities,
- the third weld metal according to the present invention is: In the second weld metal, as welding conditions, the welding heat input is in the range of 20 to 50 kJ / cm, and the lamination thickness (mm) per layer is 0.15 times or less of the heat input (kJ / cm). It is welded by controlled submerged arc welding.
- the first submerged arc welding method comprises: C: 0.09 to 0.19% by mass, Si: 0.30 mass% or less, Mn: 0.50 to 1.40% by mass, Cr: 2.00 to 3.80 mass%, Mo: 0.90 to 1.20 mass%, V: 0.25 to 0.45 mass%, Nb: 0.010 to 0.040 mass%,
- the second submerged arc welding method according to the present invention is the first submerged arc welding method, C: 0.05 to 0.15% by mass, Si: 0.10 to 0.25% by mass, Mn: 0.50 to 1.30% by mass, Cr: 2.00 to 3.25% by mass, Mo: 0.90 to 1.20 mass%, V: 0.20 to 0.40 mass%, Nb: 0.010 to 0.040 mass%, O: 250 to 450 ppm, Containing Al: 0.040 mass% or less, P: 0.010 mass% or less, S, Sn, Sb, As: 0.010 mass% or less in total amount, Bi, Pb: 1.0 ppm or less in total amount, The balance is Fe and inevitable impurities, In the microstructure, a weld metal in which crystal grains having a grain area of 400 ⁇ m 2 or less occupy 70% or more of the entire crystal grains is obtained.
- the toughness of the weld metal is stable, exhibits a high value, and is excellent in SR resistance and welding workability.
- the definition of fine grains and the influence of distribution amount on toughness were also examined. Investigate based on the measurement method of crystal grains according to ASTM E112 and JIS G0551, etc., and define the crystal grain area of the reheat part or fine grain part as 400 ⁇ m 2 or less, and the area of the reheat part or fine grain part We found that it is effective to specify In addition, according to an experimental study by the present inventors, it was difficult to make the fine particles 100% in actual construction. However, the present inventors have found that the toughness is stable even when a certain amount of coarse particles are mixed. For this reason, the fine grain region is defined as a region having a crystal grain area of 400 ⁇ m 2 or less, and the range in which the toughness can be stabilized and improved is confirmed.
- C 0.09 to 0.19 mass%
- C is added to ensure the room temperature and high temperature strength, creep strength and toughness of the weld metal, and in order to make the C content in the weld metal 0.05-0.15 mass%, in the solid wire It is necessary to limit the C content. Therefore, the C content in the solid wire is 0.09 to 0.19 mass%.
- Si: 0.30 mass% or less Si has a deoxidizing effect and has an effect of controlling the amount of O which plays an important role in the present invention. Since the Si content in the weld metal needs to be 0.10 to 0.25% by mass, the Si content in the solid wire is 0.30% by mass or less.
- Mn 0.50 to 1.40 mass% Mn also has a deoxidizing effect similar to Si and has a role of controlling the amount of O that plays an important role in the present invention, and also improves high-temperature strength and toughness. It is necessary to be 50 to 1.30% by mass. Therefore, considering the yield to the weld metal, the Mn content in the solid wire is 0.50 to 1.40 mass%.
- Cr: 2.00 to 3.80 mass%, Mo: 0.90 to 1.20 mass%” Cr and Mo are basic components of high strength 2.25% Cr-1% Mo steel, and it is necessary to add a predetermined amount from a solid wire as a base metal component of a weld metal. That is, even when the Cr content in the solid wire is less than 2.00% by mass or more than 3.80% by mass, or when the Mo content is less than 0.90% by mass or more than 1.20% by mass, the present invention However, the weld metal component obtained as a result is in the range of the base material component that is not actually used in the target high temperature environment. Therefore, the Cr content in the solid wire is 2.00 to 3.80 mass%, and the Mo content is 0.90 to 1.20 mass%.
- V 0.25 to 0.45 mass%, Nb: 0.010 to 0.040 mass%
- V has the effect of increasing the room temperature and high temperature strength and creep strength of the weld metal.
- the V content in the solid wire is 0. .25 to 0.45% by mass is required.
- Nb has the same effect as V, and in order to make the Nb content in the weld metal 0.010 to 0.040 mass%, the Nb content in the solid wire is 0.010 to 0.040 mass%. There is a need to.
- Metal carbonate (value converted to CO 2 ): 3 to 12% by mass” CO 2 by metal carbonate has the effect of reducing the amount of diffusible hydrogen in the weld metal, improving the cold cracking resistance, and adjusting the amount of O. Therefore, although the metal carbonate is necessary than 3 wt% as a value converted to CO 2, the CO 2 converted value exceeds 12 mass%, O content in the weld metal the upper limit of the range of the present invention Detach and toughness decreases. Therefore, the amount of metal carbonate is 3 to 12% by mass in terms of CO 2 . As the metal carbonate, there are CaCO 3, BaCO 3 and MgCO 3 or the like, if the value in terms of CO 2 is placed in the range, all have the same effect.
- “Welding heat input: 20 to 50 kJ / cm” The inventors of the present invention have found that, when the welding heat input is appropriately selected, a weld metal having a good balance of strength, tempering properties, hot cracking resistance and cold cracking resistance can be obtained. .
- the welding heat input is less than 20 kJ / cm, the quenching curability becomes too large and the strength is improved, but the toughness and the SR crack resistance are lowered.
- the welding heat input exceeds 50 kJ / cm the amount of oxygen in the weld metal increases, and the hardenability decreases, so the structure becomes coarse and the strength, toughness, and temper embrittlement resistance deteriorate.
- “Lamination thickness (mm) per layer is 0.15 times or less of heat input (kJ / cm)”
- the inventors of the present invention can remarkably reduce coarse particles in the raw material portion by reheating by controlling the lamination thickness per layer at the time of welding the weld metal adjusted to the composition range described later. They found that a fine-grained microstructure with stable toughness was obtained. Using the numerical value calculated with the unit of welding heat input as kJ / cm and the calculated value obtained by multiplying the numerical value by 0.15 as the maximum layer thickness (mm), when the maximum layer thickness for each welding heat input is exceeded, The reheating effect in the next layer becomes insufficient, the structure is not sufficiently finely divided, and the toughness is not stable.
- C 0.05 to 0.15 mass%
- the amount of O in the weld metal is large, the high temperature strength, creep strength and toughness are greatly reduced.
- the amount of O in the weld metal is remarkable when it is 0.025% by mass or more.
- the amount of C in the weld metal is set to 0.05 to 0.15% by mass by the present inventors, It was found that the characteristics of were greatly improved.
- the amount of C in the weld metal is less than 0.05% by mass, the strength and toughness are not sufficient, and if it exceeds 0.15% by mass, the strength becomes too high and the toughness decreases. Therefore, the amount of C in the weld metal is 0.05 to 0.15 mass%.
- Si: 0.10 to 0.25 mass% Si has a deoxidizing effect and has an effect of controlling the amount of O. For that purpose, it is necessary to contain 0.10% by mass or more in the weld metal. However, if the Si content exceeds 0.25% by mass, the tempering embrittlement resistance and SR cracking resistance deteriorate, and the strength becomes too high, which causes a decrease in toughness. Therefore, the amount of Si in the weld metal is 0.10 to 0.25% by mass.
- Mn: 0.50 to 1.30 mass% Mn, like C, has the effect of improving high-temperature strength and toughness. Mn also has a deoxidizing effect and has an action of controlling the amount of O. However, if the Mn content is less than 0.50%, the strength and toughness are not sufficient, and if the Mn content exceeds 1.30% by mass, the creep strength and the tempering embrittlement resistance deteriorate. Therefore, the amount of Mn in the weld metal is 0.50 to 1.30% by mass.
- Cr: 2.00 to 3.25 mass%, Mo: 0.90 to 1.20 mass%” Cr and Mo are basic components of high strength (2.25-3 mass%) Cr-1 mass% Mo steel. Even when the amount of Cr in the weld metal is less than 2.00% by mass or exceeds 3.25% by mass, or when the amount of Mo is less than 0.90% by mass or exceeds 1.20% by mass, the effect of the present invention is Although it is recognized, it is a matrix component range that is practically not used in the target high temperature environment. Accordingly, the Cr content in the weld metal is 2.00 to 3.25 mass%, and the Mo content is 0.90 to 1.20 mass%.
- V 0.20 to 0.40 mass
- V is one of the elements that increases the Cr activity and decreases the C activity, and has an effect of suppressing the precipitation of cementite.
- the amount of V exceeds 0.40% by mass, MC carbide precipitates in a large amount and lowers toughness.
- the V content is lower than 0.20%, the creep strength decreases. Therefore, the amount of V in the weld metal is 0.20 to 0.40 mass%.
- Nb: 0.010 to 0.040 mass% Nb has an effect of further improving room temperature and high temperature strength and creep strength as compared with the case of adding V alone. However, if the amount of Nb is less than 0.010% by mass, the effect is not sufficient, and if it exceeds 0.040% by mass, the strength becomes too high and the toughness is reduced. Therefore, the Nb content in the weld metal is 0.010 to 0.040 mass%.
- Al: 0.040 mass% or less Al has the effect
- P 0.010 mass% or less
- P is an element that segregates at the grain boundary and lowers the grain boundary strength.
- the amount of P in the weld metal exceeds 0.010% by mass, the grain boundary strength is lowered, and the possibility that SR cracking occurs is increased. Moreover, the segregation of P at the grain boundaries reduces the tempering embrittlement resistance. Therefore, the amount of P in the weld metal is set to 0.010% by mass or less.
- S, Sn, Sb, As: 0.010% by mass or less in total In addition to P, Al, and O, there are S, Sn, Sb, As, and the like as elements inevitably mixed in the weld metal. When these contents are high, it causes SR cracking and temper embrittlement. Therefore, the amount of S, Sn, Sb, and As is 0.010 mass% or less.
- Bi, Pb: 1.0 ppm or less There are Bi, Pb, and the like as elements inevitably mixed in the weld metal, but these deteriorate the SR crack resistance remarkably even if contained in a very small amount. Therefore, the amount of Bi and Pb in the weld metal is 1.0 ppm or less.
- O 250 to 450 ppm
- O forms a metal oxide in the weld metal and becomes the core of crystal grains.
- the amount of O is less than 250 ppm, the amount of metal oxide produced is small, so the number of crystal grains is small and the grains are small. Since it grows into coarse grains, the toughness decreases.
- the amount of O exceeds 450 ppm, the toughness decreases because there are too many oxides as non-metallic inclusions. Therefore, the amount of O in the weld metal is set to 250 to 450 ppm.
- the amount of O in the weld metal is preferably 300 to 400 ppm.
- the microstructure is such that crystal grains having a grain area of 400 ⁇ m 2 or less occupy 70% or more of the entire crystal grains.
- the crystal grains having a grain area of 400 ⁇ m 2 or less are 90% or more of the entire crystal grains, whereby the toughness is stabilized at a high value.
- a fine particle ratio is ensured to be 70% or more, and a low temperature impact value of ⁇ 30 ° C. (vE-30).
- the individual values of ° C) could reliably exceed 46J.
- the fine particle ratio can be increased to 90% or more, and individual values of impact energy (vE-30 ° C) Was over 55 J, and a high and stable value could be obtained.
- the base material shown in Table 1 below was provided with a groove shape having a groove angle of 10 ° and a root gap of 25 mm between the materials to be welded 1 and used as a test plate.
- a backing material 2 was provided at the bottom of the groove.
- the solid wire having the composition shown in Table 2 below and the flux having the composition shown in Table 3 below were combined and welded under the welding conditions shown in Table 4 below.
- the two-level PWHT shown in FIG. 2 was carried out, and the step cooling shown in FIG. 3 was carried out on the test piece for carrying out the temper embrittlement characteristic evaluation test.
- the mechanical test of the weld metal was performed as shown in Table 5 below.
- the specimens heat-treated under the two-level PWHT (post-weld heat treatment) conditions the one that was conducted for a long time (32 h) was subjected to a tensile test and a creep rupture test.
- the strength with reference to the steel standard: ASME A542, the case where the room temperature tensile strength was 585 to 760 MPa (PWHT 700 ° C. ⁇ 32 h) was determined to be equivalent to that of Class 4 steel.
- the high temperature (454 degreeC) tensile strength made 460 MPa (PWHT 700 degreeC x 32 h) or more favorable.
- the case where the non-rupture time was 900 h or longer was determined as good under a load condition of 540 ° C. and 210 MPa in accordance with the rules of ASME SecVIII.
- the test time was up to 2000 h.
- vTr55 Charge transition temperature indicating 55J
- ⁇ vTr55 transition amount of vTr55 after step cooling
- FIG. 4 The evaluation method of SR crack resistance is shown in FIG. 4 with reference to “Study on Stress Relief Annealing Crack (2nd Report)” (Kinouchi et al., Journal of Welding Society, Vol. 33, No. 9 (1964) p718).
- a cylindrical test piece was taken, remelted with TIG in a state where bending stress was applied, and subjected to a heat treatment at 625 ° C. for 10 hours while a tensile residual stress was generated in the U groove portion. The case where no cracks occurred was considered good.
- Example 16 the heat input of welding was too high, and the layer thickness of the bead was too thick. As a result, the reheating effect in the next layer was reduced, and the ratio of fine grains became just below the lower limit of the present invention. Although it passed, it became a value with no margin in the specified value.
- Comparative Example 22 could not obtain sufficient toughness because C in the weld metal was below the lower limit of the present invention.
- Comparative Example 23 because C in the weld metal exceeded the upper limit of the present invention, the toughness deteriorated rapidly.
- Comparative Example 24 since Si in the weld metal was below the lower limit of the present invention, deoxidation was insufficient, yield was increased until O in the weld metal exceeded the upper limit of the present invention, and toughness deteriorated rapidly.
- Comparative Example 25 since Mn in the weld metal was below the lower limit of the present invention, deoxidation was insufficient, yield was increased until O in the weld metal exceeded the upper limit of the present invention, and toughness deteriorated rapidly.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Nonmetallic Welding Materials (AREA)
- Arc Welding In General (AREA)
Abstract
Description
C:0.05乃至0.15質量%、
Si:0.10乃至0.25質量%、
Mn:0.50乃至1.30質量%、
Cr:2.00乃至3.25質量%、
Mo:0.90乃至1.20質量%、
V:0.20乃至0.40質量%、
Nb:0.010乃至0.040質量%、
O:250乃至450ppm、
を含有し、
Al:0.040質量%以下、
P:0.010質量%以下、
S、Sn、Sb、As:総量で0.010質量%以下、
Bi、Pb:総量で1.0ppm以下、
であり、残部がFe及び不可避不純物である組成を有し、
ミクロ組織において、粒面積が400μm2以下の結晶粒が結晶粒全体の70%以上を占めることを特徴とする。
C:0.09乃至0.19質量%、
Si:0.30質量%以下、
Mn:0.50乃至1.40質量%、
Cr:2.00乃至3.80質量%、
Mo:0.90乃至1.20質量%、
V:0.25乃至0.45質量%、
Nb:0.010乃至0.040質量%、
残部:Fe及び不可避不純物
である組成の溶接ワイヤを、
CO2換算で3.0乃至12.0質量%である炭酸塩を含有したフラックスと組合せて、サブマージアーク溶接することにより溶接された溶接金属において、
C:0.05乃至0.15質量%、
Si:0.10乃至0.25質量%、
Mn:0.50乃至1.30質量%、
Cr:2.00乃至3.25質量%、
Mo:0.90乃至1.20質量%、
V:0.20乃至0.40質量%、
Nb:0.010乃至0.040質量%、
O:250乃至450ppm、
を含有し、
Al:0.040質量%以下、
P:0.010質量%以下、
S、Sn、Sb、As:総量で0.010質量%以下、
Bi、Pb:1.0ppm以下、
であり、残部がFe及び不可避不純物である組成を有し、
ミクロ組織において、粒面積が400μm2以下の結晶粒が結晶粒全体の70%以上を占めることを特徴とする。
上記第2の溶接金属において、溶接条件として、溶接入熱が20乃至50kJ/cmの範囲で、1層当たりの積層厚さ(mm)が入熱量(kJ/cm)の0.15倍以下であるように制御したサブマージアーク溶接によって溶接されたものであることを特徴とする。
C:0.09乃至0.19質量%、
Si:0.30質量%以下、
Mn:0.50乃至1.40質量%、
Cr:2.00乃至3.80質量%、
Mo:0.90乃至1.20質量%、
V:0.25乃至0.45質量%、
Nb:0.010乃至0.040質量%、
残部:Fe及び不可避不純物
である組成の溶接ワイヤを、
CO2換算で3.0乃至12.0質量%である炭酸塩を含有したフラックスと組合せて、溶接条件として、溶接入熱が20乃至50kJ/cmの範囲で、1層当たりの積層厚さ(mm)が入熱量(kJ/cm)の0.15倍以下であるように制御してサブマージアーク溶接することを特徴とする。
C:0.05乃至0.15質量%、
Si:0.10乃至0.25質量%、
Mn:0.50乃至1.30質量%、
Cr:2.00乃至3.25質量%、
Mo:0.90乃至1.20質量%、
V:0.20乃至0.40質量%、
Nb:0.010乃至0.040質量%、
O:250乃至450ppm、
を含有し、
Al:0.040質量%以下、
P:0.010質量%以下、
S、Sn、Sb、As:総量で0.010質量%以下、
Bi、Pb:総量で1.0ppm以下、
残部がFe及び不可避不純物である組成を有し、
ミクロ組織において、粒面積が400μm2以下の結晶粒が結晶粒全体の70%以上を占める溶接金属を得るものであることを特徴とする。
Cは溶接金属の室温及び高温強度、クリープ強度及び靱性を確保するために添加するものであり、溶接金属中のC含有量を0.05-0.15質量%にするために、ソリッドワイヤ中のC含有量を制限する必要がある。従って、ソリッドワイヤ中のC含有量は0.09-0.19質量%とする。
Siは脱酸効果を有しており、本発明で重要な役割を果たすO量を制御する作用がある。溶接金属中のSi含有量を0.10乃至0.25質量%にする必要があるので、ソリッドワイヤ中のSi含有量は0.30質量%以下とする。
MnもSi同様に脱酸効果を有し、本発明で重要な役割を果たすO量を制御する役割があるほか、高温強度及び靱性を向上させることから、溶接金属中のMn含有量を0.50乃至1.30質量%とする必要がある。従って、溶接金属への歩留まりを考えると、ソリッドワイヤ中のMn含有量は0.50乃至1.40質量%とする。
Cr及びMoは、高強度2.25%Cr-1%Mo鋼の基本成分であり、溶接金属の母材成分として、所定量をソリッドワイヤから添加する必要がある。即ち、ソリッドワイヤ中のCr含有量が2.00質量%未満若しくは3.80質量%を超える場合、又はMo含有量が0.90質量%未満若しくは1.20質量%を超える場合においても本発明の効果は認められるが、その結果得られる溶接金属成分は実際には対象とする高温環境下では使用されない母材成分範囲となる。従って、ソリッドワイヤ中のCr含有量は2.00乃至3.80質量%とし、Mo含有量は0.90乃至1.20質量%とする。
Vは、溶接金属の室温及び高温強度とクリープ強度を高める効果があり、溶接金属中のV含有量を0.20乃至0.40質量%にするために、ソリッドワイヤ中のV含有量を0.25乃至0.45質量%にする必要がある。NbもVと同様の効果があり、溶接金属中のNb含有量を0.010乃至0.040質量%にするために、ソリッドワイヤ中のNb含有量を0.010乃至0.040質量%とする必要がある。
金属炭酸塩によるCO2は、溶接金属の拡散性水素量を低減し、耐低温割れ性を向上する効果と、O量を調整する効果を持つ。そのためには、金属炭酸塩をCO2に換算した値
で3質量%以上必要であるが、CO2換算値が12質量%を超えると、溶接金属中のO量が本発明範囲の上限値を外れ、靱性が低下する。従って、金属炭酸塩の量はCO2に換算した値で3乃至12質量%とする。なお、金属炭酸塩としては、CaCO3、BaCO3及びMgCO3等があるが、CO2に換算した値が上記範囲に入れば、いずれも同様の効果を有する。
本発明者等は、溶接入熱を適切に選択すると、強度、焼戻し特性、耐高温割れ性及び耐低温割れ性がバランス良く、またこれらの特性が良好である溶接金属が得られることを見いだした。溶接入熱が20kJ/cm未満であると、焼き入れ硬化性が大きくなりすぎ、強度は向上するが、靱性及び耐SR割れ性が低下する。一方、溶接入熱が50kJ/cmを超えると、溶接金属中の酸素量が高くなるとともに、焼き入れ性が低下するので、組織が粗大化し、強度、靱性及び耐焼戻し脆化特性低下する。
本発明者等は、後述の組成範囲に調整された溶接金属を溶接する時点において、1層あたりの積層厚さを制御することによって原質部の粗粒を再熱によって著しく減少させることができ、靱性が安定した細粒主体のミクロ組織が得られることを見いだした。溶接入熱量の単位をkJ/cmとして計算した数値を用い、その数値を0.15倍した計算値を最大層厚(mm)とすると、溶接入熱毎の最大層厚を超えた場合に、次層での再熱効果が不十分となり、組織が十分に細粒化せず、靱性が安定しない。好ましくは、積層厚さ(mm)≦入熱(kJ/cm)×0.12の範囲とする。この範囲であれば衝撃試験片N=3~5のうち異常な低値を示す試験片はほぼ皆無となる。
一般に、溶接金属中にO量が多いと高温強度、クリープ強度及び靱性は大きく低下する。特に、溶接金属中のO量が0.025質量%以上であると顕著であるが、本発明者の研究により、溶接金属中のC量を0.05乃至0.15質量%にすると、これらの特性が大きく改善されることが分かった。しかし、溶接金属中のC量が0.05質量%未満では、強度及び靱性が十分ではなく、また0.15質量%を超えると、強度が高くなりすぎて靱性が低下する。従って、溶接金属中のC量は0.05乃至0.15質量%とする。
Siは脱酸効果があり、O量を制御する作用を有し、そのためには溶接金属中に0.10質量%以上含有することが必要である。しかし、Si含有量が0.25質量%を超えると、耐焼戻し脆化特性及び耐SR割れ性が低下すると共に、強度が高くなりすぎて靱性低下の原因ともなる。従って、溶接金属中のSi量は0.10乃至0.25質量%とする。
MnもCと同様に、高温強度及び靱性を改善する効果を有する。また、Mnは脱酸効果もあり、O量を制御する作用も有している。しかし、Mn含有量が0.50%未満では強度及び靱性が十分ではなく、またMn含有量が1.30質量%を超えると、クリープ強度及び耐焼戻し脆化特性が低下する。従って、溶接金属中のMn量は0.50乃至1.30質量%とする。
Cr及びMoは、高強度(2.25~3質量%)Cr-1質量%Mo鋼の基本成分である。溶接金属中のCr量が2.00質量%未満若しくは3.25質量%を超える場合、又はMo量が0.90質量%未満若しくは1.20質量%を超える場合においても、本発明の効果は認められるが、実際上、対象とする高温環境下では使用されない母材成分範囲である。従って、溶接金属中のCr量は2.00乃至3.25質量%、Mo量は0.90乃至1.20質量%とする。
Vは、Cr活量を高め、C活量を低くする元素の一つであり、セメンタイトの析出抑制効果を有する。しかし、V量が0.40質量%を超えると、MC炭化物が大量に析出し、靱性を低下させる。また、V量が0.20%より低いと、クリープ強度が低下する。従って、溶接金属中のV量は0.20乃至0.40質量%とする。
Nbは、Vを単独添加する場合と比較して、更に一層、室温及び高温強度並びにクリープ強度を向上させる効果をもつ。しかしながら、Nb量が0.010質量%未満ではその効果が十分でなく、0.040質量%を超えると、強度が高くなりすぎて、靱性低下の原因ともなる。従って、溶接金属中のNb量は0.010乃至0.040質量%とする。
Alは靱性を低下させる作用を有し、溶接金属中のAl量が0.040質量%を超えると、靱性の低下が顕著になる。従って、溶接金属中のAl量の上限値は0.040質量%とする。
Pは粒界に偏析し、粒界強度を低下させる元素である。溶接金属中のP量が0.010質量%を超えると、粒界強度が低下し、SR割れが発生する可能性が高くなる。また、Pが粒界に偏析することによって、耐焼戻し脆化特性が低下する。従って、溶接金属中のP量は0.010質量%以下とする。
溶接金属中に不可避的に混入する元素として、P、Al及びOの他に、S、Sn、Sb、As等がある。これらの含有量が高いと、SR割れ及び焼戻し脆化が発生する原因となる。従って、S、Sn、Sb、As量は0.010質量%以下とする。
溶接金属中に不可避的に混入する元素としてBi、Pb等もあるが、これらは極微量の含有でも耐SR割れ性を著しく劣化させる。従って、溶接金属中のBi、Pb量は1.0ppm以下とする。
Oは溶接金属中にて金属酸化物を形成し、結晶粒の核となるが、O量が250ppm未満であると、金属酸化物の生成量が少ないため、結晶粒の数が少なく、粒が粗粒に成長してしまうため、靱性が低下する。一方、O量が450ppmを超えると、非金属介在物としての酸化物が多すぎるため、靱性が低下する。従って、溶接金属中のO量は250乃至450ppmとする。溶接金属中のO量は、好ましくは、300乃至400ppmである。
ミクロ組織のうち、細粒と定義した粒面積400μm2以下の結晶粒が70%より少ない比率である場合、N=6のうち少なくとも1~2個の衝撃試験において、-30℃における衝撃値(vE-30℃)が54Jを下回る低値を示すことが判明した。従って、粒面積が400μm2以下の結晶粒が結晶粒全体の70%以上を占めるミクロ組織にする。望ましくは、粒面積が400μm2以下の結晶粒が結晶粒全体の90%以上とすることで、靱性が高い値で安定する。本発明の溶接金属の組成範囲内で、溶接金属中のO量を250乃至450ppmに調整することにより、細粒の比率が70%以上を確保し、-30℃の低温衝撃値(vE-30℃)の個々の値が46Jを確実に超えることができた。また、O量を300乃至400ppmに調整し、かつ溶接条件によって層厚を調整することで、細粒の比率を90%以上とすることができ、衝撃エネルギ(vE-30℃)の個々の値が55Jを超え、高く安定した値を得ることができた。
2…裏当材
Claims (5)
- サブマージアーク溶接によって溶接された溶接金属において、
C:0.05乃至0.15質量%、
Si:0.10乃至0.25質量%、
Mn:0.50乃至1.30質量%、
Cr:2.00乃至3.25質量%、
Mo:0.90乃至1.20質量%、
V:0.20乃至0.40質量%、
Nb:0.010乃至0.040質量%、
O:250乃至450ppm、
を含有し、
Al:0.040質量%以下、
P:0.010質量%以下、
S、Sn、Sb、As:総量で0.010質量%以下、
Bi、Pb:総量で1.0ppm以下、
であり、残部がFe及び不可避不純物である組成を有し、
ミクロ組織において、粒面積が400μm2以下の結晶粒が結晶粒全体の70%以上を占めることを特徴とする溶接金属。 - C:0.09乃至0.19質量%、
Si:0.30質量%以下、
Mn:0.50乃至1.40質量%、
Cr:2.00乃至3.80質量%、
Mo:0.90乃至1.20質量%、
V:0.25乃至0.45質量%、
Nb:0.010乃至0.040質量%、
残部:Fe及び不可避不純物
である組成の溶接ワイヤを、
CO2換算で3.0乃至12.0質量%である炭酸塩を含有したフラックスと組合せて、サブマージアーク溶接することにより溶接された溶接金属において、
C:0.05乃至0.15質量%、
Si:0.10乃至0.25質量%、
Mn:0.50乃至1.30質量%、
Cr:2.00乃至3.25質量%、
Mo:0.90乃至1.20質量%、
V:0.20乃至0.40質量%、
Nb:0.010乃至0.040質量%、
O:250乃至450ppm、
を含有し、
Al:0.040質量%以下、
P:0.010質量%以下、
S、Sn、Sb、As:総量で0.010質量%以下、
Bi、Pb:1.0ppm以下、
であり、残部がFe及び不可避不純物である組成を有し、
ミクロ組織において、粒面積が400μm2以下の結晶粒が結晶粒全体の70%以上を占めることを特徴とする溶接金属。 - 溶接条件として、溶接入熱が20乃至50kJ/cmの範囲で、1層当たりの積層厚さ(mm)が入熱量(kJ/cm)の0.15倍以下であるように制御したサブマージアーク溶接によって溶接されたものであることを特徴とする請求項2に記載の溶接金属。
- C:0.09乃至0.19質量%、
Si:0.30質量%以下、
Mn:0.50乃至1.40質量%、
Cr:2.00乃至3.80質量%、
Mo:0.90乃至1.20質量%、
V:0.25乃至0.45質量%、
Nb:0.010乃至0.040質量%、
残部:Fe及び不可避不純物
である組成の溶接ワイヤを、
CO2換算で3.0乃至12.0質量%である炭酸塩を含有したフラックスと組合せて、溶接条件として、溶接入熱が20乃至50kJ/cmの範囲で、1層当たりの積層厚さ(mm)が入熱量(kJ/cm)の0.15倍以下であるように制御してサブマージアーク溶接することを特徴とするサブマージアーク溶接方法。 - C:0.05乃至0.15質量%、
Si:0.10乃至0.25質量%、
Mn:0.50乃至1.30質量%、
Cr:2.00乃至3.25質量%、
Mo:0.90乃至1.20質量%、
V:0.20乃至0.40質量%、
Nb:0.010乃至0.040質量%、
O:250乃至450ppm、
を含有し、
Al:0.040質量%以下、
P:0.010質量%以下、
S、Sn、Sb、As:総量で0.010質量%以下、
Bi、Pb:総量で1.0ppm以下、
残部がFe及び不可避不純物である組成を有し、
ミクロ組織において、粒面積が400μm2以下の結晶粒が結晶粒全体の70%以上を占める溶接金属を得るものであることを特徴とする請求項4に記載のサブマージアーク溶接方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201180045825.XA CN103153529B (zh) | 2010-11-24 | 2011-11-21 | 焊接金属及潜弧焊接方法 |
EP11843589.0A EP2610029B1 (en) | 2010-11-24 | 2011-11-21 | Weld metal and method for submerged arc welding |
ES11843589T ES2764836T3 (es) | 2010-11-24 | 2011-11-21 | Metal de soldadura y método para soldadura por arco sumergido |
BR112013008858A BR112013008858B1 (pt) | 2010-11-24 | 2011-11-21 | metal de solda e método de soldagem por arco submerso |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010-261806 | 2010-11-24 | ||
JP2010261806A JP5611006B2 (ja) | 2010-11-24 | 2010-11-24 | 溶接金属及びサブマージアーク溶接方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012070524A1 true WO2012070524A1 (ja) | 2012-05-31 |
Family
ID=46145866
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/076791 WO2012070524A1 (ja) | 2010-11-24 | 2011-11-21 | 溶接金属及びサブマージアーク溶接方法 |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2610029B1 (ja) |
JP (1) | JP5611006B2 (ja) |
CN (1) | CN103153529B (ja) |
BR (1) | BR112013008858B1 (ja) |
ES (1) | ES2764836T3 (ja) |
WO (1) | WO2012070524A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014119785A1 (ja) * | 2013-02-04 | 2014-08-07 | 株式会社神戸製鋼所 | 溶接金属および溶接構造体 |
WO2014119197A1 (ja) * | 2013-02-04 | 2014-08-07 | 株式会社神戸製鋼所 | 高強度2.25Cr-1Mo-V鋼用サブマージアーク溶接ワイヤおよび溶接金属 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103882344A (zh) * | 2014-03-11 | 2014-06-25 | 舞阳钢铁有限责任公司 | 加钒铬钼钢板及其生产方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0284293A (ja) * | 1988-06-14 | 1990-03-26 | Kobe Steel Ltd | 高強度Cr−Mo鋼のサブマージアーク溶接方法 |
JPH06328292A (ja) | 1993-05-24 | 1994-11-29 | Kobe Steel Ltd | 高強度Cr−Mo鋼用サブマージアーク溶接方法 |
JPH08150478A (ja) * | 1994-09-30 | 1996-06-11 | Kobe Steel Ltd | 高強度Cr−Mo鋼用サブマージアーク溶接方法及び溶接金属 |
JPH09192881A (ja) | 1995-11-08 | 1997-07-29 | Kobe Steel Ltd | 高強度Cr−Mo鋼の溶接金属及びサブマージアーク溶接方法 |
JP2009106949A (ja) * | 2007-10-26 | 2009-05-21 | Kobe Steel Ltd | 高強度Cr−Mo鋼の溶接金属 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6171196A (ja) * | 1984-09-13 | 1986-04-12 | Kawasaki Steel Corp | Cr−Mo系低合金鋼のサブマ−ジア−ク溶接方法 |
JPH03258490A (ja) * | 1990-03-08 | 1991-11-18 | Nippon Steel Corp | Cr―Mo系低合金鋼のサブマージアーク溶接方法 |
JP3283768B2 (ja) * | 1996-10-28 | 2002-05-20 | 株式会社神戸製鋼所 | 高強度Cr−Mo鋼のTIG溶接金属及びTIG溶接方法 |
JP2006225718A (ja) * | 2005-02-17 | 2006-08-31 | Kobe Steel Ltd | 低温靭性および耐SR割れ性に優れた高強度Cr−Mo鋼用溶着金属 |
JP4902489B2 (ja) * | 2007-02-19 | 2012-03-21 | 株式会社神戸製鋼所 | 高強度Cr−Mo鋼の溶接金属 |
FR2939340B1 (fr) * | 2008-12-09 | 2010-12-31 | Air Liquide | Flux et fil pour le soudage a l'arc submerge des aciers crmov. |
-
2010
- 2010-11-24 JP JP2010261806A patent/JP5611006B2/ja active Active
-
2011
- 2011-11-21 BR BR112013008858A patent/BR112013008858B1/pt not_active IP Right Cessation
- 2011-11-21 ES ES11843589T patent/ES2764836T3/es active Active
- 2011-11-21 CN CN201180045825.XA patent/CN103153529B/zh active Active
- 2011-11-21 WO PCT/JP2011/076791 patent/WO2012070524A1/ja active Application Filing
- 2011-11-21 EP EP11843589.0A patent/EP2610029B1/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0284293A (ja) * | 1988-06-14 | 1990-03-26 | Kobe Steel Ltd | 高強度Cr−Mo鋼のサブマージアーク溶接方法 |
JPH06328292A (ja) | 1993-05-24 | 1994-11-29 | Kobe Steel Ltd | 高強度Cr−Mo鋼用サブマージアーク溶接方法 |
JPH08150478A (ja) * | 1994-09-30 | 1996-06-11 | Kobe Steel Ltd | 高強度Cr−Mo鋼用サブマージアーク溶接方法及び溶接金属 |
JPH09192881A (ja) | 1995-11-08 | 1997-07-29 | Kobe Steel Ltd | 高強度Cr−Mo鋼の溶接金属及びサブマージアーク溶接方法 |
JP2009106949A (ja) * | 2007-10-26 | 2009-05-21 | Kobe Steel Ltd | 高強度Cr−Mo鋼の溶接金属 |
Non-Patent Citations (1)
Title |
---|
KIUCHI ET AL., JOURNAL OF THE JAPAN WELDING SOCIETY, vol. 33, no. 9, 1964, pages 718 |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014119785A1 (ja) * | 2013-02-04 | 2014-08-07 | 株式会社神戸製鋼所 | 溶接金属および溶接構造体 |
WO2014119197A1 (ja) * | 2013-02-04 | 2014-08-07 | 株式会社神戸製鋼所 | 高強度2.25Cr-1Mo-V鋼用サブマージアーク溶接ワイヤおよび溶接金属 |
CN104955607A (zh) * | 2013-02-04 | 2015-09-30 | 株式会社神户制钢所 | 高强度2.25Cr-1Mo-V钢用埋弧焊丝及焊接金属 |
CN105008088A (zh) * | 2013-02-04 | 2015-10-28 | 株式会社神户制钢所 | 焊接金属和焊接结构体 |
EP2952285A4 (en) * | 2013-02-04 | 2016-06-22 | Kobe Steel Ltd | UNDERPULSE WELDING WIRE FOR HIGH-WALL 2.25CR-1MO-V STEEL AND WELDING METAL |
CN105008088B (zh) * | 2013-02-04 | 2017-06-09 | 株式会社神户制钢所 | 焊接金属和焊接结构体 |
US9879335B2 (en) | 2013-02-04 | 2018-01-30 | Kobe Steel, Ltd. | Weld metal and welded structure |
CN104955607B (zh) * | 2013-02-04 | 2018-03-09 | 株式会社神户制钢所 | 高强度2.25Cr‑1Mo‑V钢用埋弧焊丝及焊接金属 |
Also Published As
Publication number | Publication date |
---|---|
JP2012110932A (ja) | 2012-06-14 |
BR112013008858A2 (pt) | 2017-09-26 |
EP2610029A1 (en) | 2013-07-03 |
CN103153529A (zh) | 2013-06-12 |
EP2610029A4 (en) | 2016-08-31 |
EP2610029B1 (en) | 2019-12-25 |
JP5611006B2 (ja) | 2014-10-22 |
ES2764836T3 (es) | 2020-06-04 |
BR112013008858B1 (pt) | 2019-01-02 |
CN103153529B (zh) | 2015-08-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4835771B1 (ja) | Ni基耐熱合金用溶接材料ならびにそれを用いてなる溶接金属および溶接継手 | |
JP5201665B2 (ja) | 大入熱溶接時の熱影響部の靭性に優れた溶接用高張力厚鋼板 | |
EP2048255A1 (en) | Austenitic stainless steel welded joint and austenitic stainless steel welding material | |
JP6226542B2 (ja) | 溶接熱影響部の靭性に優れた鋼材 | |
JP2004323937A (ja) | オーステナイト系ステンレス鋼 | |
WO2012108517A1 (ja) | クリープ特性に優れた溶接金属 | |
JP2009084606A (ja) | 長期使用後の加工性に優れた高温用オーステナイト系ステンレス鋼 | |
JP4835770B1 (ja) | オーステナイト系耐熱鋼用溶接材料ならびにそれを用いてなる溶接金属および溶接継手 | |
JP2021036077A (ja) | 高Mn鋼 | |
JP2017202494A (ja) | オーステナイト系耐熱鋼溶接金属およびそれを有する溶接継手 | |
US11866814B2 (en) | Austenitic stainless steel | |
JP5394849B2 (ja) | 溶接熱影響部の靭性に優れた厚鋼板 | |
JP5611006B2 (ja) | 溶接金属及びサブマージアーク溶接方法 | |
JP5685116B2 (ja) | 耐焼戻し脆化特性に優れた溶接金属 | |
JP5457859B2 (ja) | 低温靭性および落重特性に優れた溶接金属 | |
JP5457920B2 (ja) | 低温靭性および落重特性に優れた溶接金属 | |
JP7372537B2 (ja) | オーステナイト系耐熱鋼 | |
WO2019070001A1 (ja) | オーステナイト系ステンレス鋼溶接金属および溶接構造物 | |
JP5741454B2 (ja) | −196℃におけるシャルピー試験値が母材、溶接継手共に100J以上である靭性と生産性に優れたNi添加鋼板およびその製造方法 | |
KR20220131996A (ko) | 강재 및 그의 제조 방법, 그리고 탱크 | |
JP4276576B2 (ja) | 大入熱溶接熱影響部靭性に優れた厚手高強度鋼板 | |
JP2017053028A (ja) | フェライト−マルテンサイト2相ステンレス鋼およびその製造方法 | |
JP6795038B2 (ja) | オーステナイト系耐熱合金およびそれを用いた溶接継手 | |
KR101659245B1 (ko) | 용접 열 영향부의 인성이 우수한 후강판 | |
JP2005336602A (ja) | 入熱20〜100kJ/mmの大入熱溶接用高HAZ靭性鋼材 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201180045825.X Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11843589 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2011843589 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112013008858 Country of ref document: BR |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01E Ref document number: 112013008858 Country of ref document: BR |
|
ENP | Entry into the national phase |
Ref document number: 112013008858 Country of ref document: BR Kind code of ref document: A2 Effective date: 20130411 |