WO2020136777A1 - 溶接構造体 - Google Patents

溶接構造体 Download PDF

Info

Publication number
WO2020136777A1
WO2020136777A1 PCT/JP2018/047975 JP2018047975W WO2020136777A1 WO 2020136777 A1 WO2020136777 A1 WO 2020136777A1 JP 2018047975 W JP2018047975 W JP 2018047975W WO 2020136777 A1 WO2020136777 A1 WO 2020136777A1
Authority
WO
WIPO (PCT)
Prior art keywords
joining member
joined
plate thickness
distance
thickness direction
Prior art date
Application number
PCT/JP2018/047975
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
鉄平 大川
祐介 島田
直樹 小田
Original Assignee
日本製鉄株式会社
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=67690501&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2020136777(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by 日本製鉄株式会社 filed Critical 日本製鉄株式会社
Priority to JP2019519786A priority Critical patent/JP6562189B1/ja
Priority to KR1020207003064A priority patent/KR102105614B1/ko
Priority to CN201880054150.7A priority patent/CN111315650B/zh
Priority to PCT/JP2018/047975 priority patent/WO2020136777A1/ja
Publication of WO2020136777A1 publication Critical patent/WO2020136777A1/ja

Links

Images

Classifications

    • 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
    • B23K9/02—Seam welding; Backing means; Inserts
    • B23K9/025—Seam welding; Backing means; Inserts for rectilinear seams
    • B23K9/0256—Seam welding; Backing means; Inserts for rectilinear seams for welding ribs on plates
    • 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
    • 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
    • B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
    • B23K9/0035—Arc welding or cutting specially adapted for particular articles or work of thin articles
    • 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
    • B23K2101/18—Sheet panels
    • 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

Definitions

  • the present invention relates to a welded structure used in a container ship or the like.
  • Hatch large container vessels that carry a large amount of cargo have a large opening (hatch) formed in the upper deck (upper deck) for loading and unloading cargo.
  • a hatchside combing is provided on the upper deck so as to surround the hatch to prevent the inflow of seawater.
  • the upper deck and the hatch side combing are each constructed by welding a plurality of steel plates. Hatchside combing is also welded on the upper deck.
  • each of the hatchside combing and the upper deck has a structure in which a plurality of steel plates are welded.
  • the hatchside combing and the upper deck are formed with a plurality of welds for welding the steel plates to each other.
  • the crack generated in the weld easily propagates along the weld. Therefore, for example, when a crack occurs in the hatch side combing weld, the crack propagates toward the upper deck side along the weld, and the propagated crack propagates to the weld in the upper deck. There are cases. Therefore, in order to sufficiently improve the strength of the hull, the hatchside combing and the upper deck must have the characteristics (brittle crack propagation stopping characteristics) that can stop the crack growth as described above.
  • Patent Documents 1 and 2 disclose welded structures relating to brittle crack propagation arresting properties.
  • a crack may be generated from the upper deck and propagated toward the hatchside combing side. Then, according to the results of the verification test carried out in the joint research between the Japan Maritime Association and the Japan Welding Association, in order to stop the propagation of cracks that occur in the upper deck and propagate toward the hatchside combing side, It has been found that it is necessary to use a thick steel plate having an extremely high Kca value of 8,000 N/mm 1.5 or more.
  • the present invention has been made to solve such a problem, and an object thereof is to provide a welded structure having excellent brittle crack propagation arresting properties.
  • the gist of the present invention is the following welded structure.
  • the joining member has a first surface and a second surface perpendicular to the plate thickness direction of the joining member,
  • the plate thickness t (mm) of the joining member satisfies the following formula (i)
  • a distance in the plate thickness direction of the joining member between the highest point of the first heat-affected zone of the first welded portion formed on the first surface side and the first surface is a distance h 1 (mm)
  • the second When the distance in the plate thickness direction of the joining member between the highest point of the second heat-affected zone of the second welded portion formed on the surface side and the second surface is a distance h 2 (mm),
  • a non-ductile transition temperature by a heavy test is ⁇ 60° C. or lower and satisfies the following formulas (ii) and (iii), Welded structure.
  • t ⁇ 50.0 NDTT 1 ⁇ 30.5 ⁇ ln(h 1 ) ⁇ 14.0
  • NDTT 2 ⁇ 30.5 ⁇ ln(h 2 ) ⁇ 14.0
  • NDTT 1 and NDTT 2 are the non-ductile transition temperature (° C.) measured by the NRL drop weight test using the type P3 test piece defined in ASTM E208, which is sampled from the 1 mm depth positions of the first surface and the second surface, respectively. ).
  • the acute angle ⁇ 2 (°) formed by and the partial penetration d 2 (mm) of the joint in the plate thickness direction and the distance s 2 (mm) between the toe on the joined member side and the second surface are as follows. Satisfies the expressions (vi) to (xi), The welded structure according to (1) or (2) above.
  • the yield stress of the joining member is 400 to 580 MPa, and the tensile strength is 510 to 750 MPa.
  • the welded structure according to any one of (1) to (4) above.
  • a welded structure having excellent brittle crack propagation arresting properties can be obtained.
  • the structure is such that the crack entry area is limited to only the surface layer area of the thick steel plate used for hatchside combing. If it is possible to improve the brittle crack propagation stopping property in the surface layer region of the thick steel plate, it becomes possible to stop the crack growth. As a result, it becomes possible to improve the brittle crack propagation arresting property of the entire welded structure at low cost.
  • FIG. 1 is a perspective view showing a welding structure according to an embodiment of the present invention.
  • the welded structure 10 according to the present embodiment includes a joining member 11 and a joined member 12.
  • the joining member 11 is plate-shaped and has a first surface 11a and a second surface 11b that are perpendicular to the plate thickness direction.
  • the member 12 to be joined is plate-shaped, and has a face 12a to be joined with which the end surface 11c of the joining member 11 abuts.
  • the welded structure 10 has a T joint portion in which the joining member 11 is partially welded to both sides of the joined member 12 in a state where the end surface 11c is in contact with the joined surface 12a. ..
  • the above-mentioned welded structure having the T-joint portion includes, for example, structures having the shapes shown in FIGS. 2 and 3.
  • joining member 11 and the joined member 12 may be joined by fillet welding, but from the viewpoint of joining strength, the joining member 11 is provided with a groove and is joined by groove welding. Is preferred.
  • a thick joining member is targeted, and specifically, when the plate thickness of the joining member 11 is t (mm), the following formula (i) is satisfied.
  • the plate thickness t (mm) of the joining member 11 preferably satisfies the following formula (xii).
  • the upper limit of t need not be specified in particular, but can be set to 200 mm, 150 mm, or 120 mm, for example. t ⁇ 50.0 (i) t>80.0 (xii)
  • the plate thickness of the members to be joined is not particularly limited, but like the joined members, it is preferably 50.0 mm or more, and more preferably more than 80.0 mm.
  • the welded structure 10 has a first welded portion 13a formed on the first surface 11a side and a second welded portion 13b formed on the second surface 11b side.
  • FIG. 4 is a cross-sectional view of the welded structure 10 perpendicular to the first surface 11a and the surface 12a to be joined. In FIG. 4, hatching is not added in order to avoid making the drawing complicated.
  • a first weld metal 14a is formed on the first surface 11a side of the joining portion of the joining member 11 and the joined member 12.
  • a first heat-affected zone 15a is formed at the boundary between the first weld metal 14a and the joining member 11 and the joined member 12.
  • the second weld metal 14b is formed on the second surface 11b side, and the second heat-affected zone 15b is formed at the boundary between the second weld metal 14b and the joining member 11 and the joined member 12.
  • the welded portion means a portion in which the weld metal and the heat affected zone are combined. That is, the area where the first weld metal 14a and the first heat-affected zone 15a are combined is the first weld zone 13a, and the area where the second weld metal 14b and the second heat-affected zone 15b are combined is the second weld zone. 13b.
  • the highest peak of the first welding portion 13a from the first surface 11a In order to limit the penetration region of the crack generated from the member to be joined 12 and propagating to the joining member 11 to only the surface layer side of the joining member 11, the highest peak of the first welding portion 13a from the first surface 11a. And the depth from the second surface 11b to the apex of the second weld 13b need to be controlled.
  • the distance h 1 (mm) in the plate thickness direction of the joining member 11 between the highest point of the first heat-affected zone 15a of the first welded portion 13a and the first surface 11a and the second distance of the second welded portion 13b It is preferable that the distance h 2 (mm) in the plate thickness direction between the highest point of the heat-affected zone 15b and the second surface 11b satisfies the following equations (iv) and (v). h 1 ⁇ t/4 (iv) h 2 ⁇ t/4 (v)
  • the lower limits of the distance h 1 and the distance h 2 need not be particularly limited, but even when the joining member 11 and the joined member 12 are joined by fillet welding, thermal influence is exerted up to a depth of about 1 mm. Parts are formed. Therefore, 1 mm is the practical lower limit of the distance h 1 and the distance h 2 .
  • the highest point of the first heat-affected zone 15a means the tip in the plate thickness direction of the first heat-affected zone 15a
  • the highest point of the second heat-affected zone 15b means the second heat-affected zone 15b.
  • the distance h 1 is a distance between the first surface 11a and a virtual surface 11d that is parallel to the first surface 11a and passes through the tip of the first heat-affected zone 15a in the plate thickness direction.
  • the distance h 2 is a distance between the second surface 11b and a virtual surface 11e that is parallel to the second surface 11b and passes through the tip of the second heat-affected zone 15b in the plate thickness direction.
  • the acute angle ⁇ 2 (°) formed by the line L 2 passing through the toe and the route and the joined surface 12 a satisfy the following equations (vi) and (vii), respectively. 45.0 ⁇ 1 ⁇ 70.0 (vi) 45.0 ⁇ 2 ⁇ 70.0 (vii)
  • the toe on the joining member 11 side in the first welded portion 13a means the intersection A 1 between the outer edge of the first weld metal 14a and the first surface 11a.
  • the route on the joining member 11 side in the first welded portion 13a means the intersection B 1 between the outer edge of the first welded metal 14a and the end surface 11c.
  • the bonding member 11 side of the toe at the second weld portion 13b means an intersection A 2 between the outer edge and the second surface 11b of the second weld metal 14b
  • the bonding member 11 side in the second welding portion 13b Means the intersection B 2 between the outer edge of the second weld metal 14b and the end surface 11c.
  • the partial penetration d 1 (mm) of the joint in the plate thickness direction of the first welded portion 13a and the partial penetration d 2 (mm) of the joint in the plate thickness direction of the second welded portion 13b are respectively the following (viii). It is preferable to satisfy the formula and the formula (ix).
  • the values calculated on the left side of the following formulas (viii) and (ix) represent effective throat thicknesses Td 1 (mm) and Td 2 (mm), respectively.
  • the partial penetration d 1 of the joint is a virtual surface that passes through the first surface 11a and the end on the plate thickness center side of the first weld metal 14a parallel to the first surface 11a and in the plate thickness direction of the joining member 11. It is the distance from 11f.
  • the partial penetration d 2 of the joint is an imaginary line that passes through the second surface 11b and the end portion of the second weld metal 14b in the plate thickness direction of the joining member 11 on the plate thickness center side in parallel with the second surface 11b. This is the distance from the flat surface 11g.
  • the distance s 1 (mm) between the toe on the joined member 12 side and the first surface 11a and the toe on the joined member 12 side in the second welded portion 13b is preferable that the distance s 2 (mm) between the second surface 11b and the second surface 11b satisfies the following expressions (x) and (xi), respectively. s 1 ⁇ d 1 (sec( ⁇ 1 ) ⁇ 1) (x) s 2 ⁇ d 2 (sec( ⁇ 2 )-1) (xi)
  • the distance s 1 and the distance s 2 are the weld leg lengths in the plate thickness direction of the first welded portion 13a and the second welded portion 13b, respectively.
  • the distance s 1 is an imaginary line passing through the first surface 11a and an end portion that is parallel to the first surface 11a and that is opposite to the plate thickness center of the first weld metal 14a in the plate thickness direction of the joining member 11. This is the distance from the target surface 11h.
  • the distance s 2 is a virtual surface that passes through the second surface 11b and an end portion that is parallel to the second surface 11b and that is opposite to the plate thickness center of the second weld metal 14b in the plate thickness direction of the joining member 11. It is the distance from 11i.
  • first weld metal 14a and the second weld metal 14b and the joining member 11 can be easily visually identified. Also, the tip positions of the first heat-affected zone 15a and the second heat-affected zone 15b can be easily determined by exposing them by nital corrosion.
  • Non-ductile transition temperature of the joining member As described above, in order to improve the brittle crack propagation arresting property over the entire thickness of the joining member, for example, a steel sheet having a Kca value of 8000 N/mm 1.5 or more is used as the joining member. However, there is a problem that it is difficult to secure a steel sheet having such characteristics. However, by improving the brittle crack propagation stopping property at least in the surface layer portion of the joining member according to the depth of the region into which the crack penetrates, it becomes possible to stop the propagation of the crack.
  • the non-ductile transition temperature by the NRL drop weight test using the type P3 test piece specified in ASTM E208, which is sampled from the 1 mm depth positions of the first surface 11a and the second surface 11b, is set to ⁇ 60° C. or less. And it is necessary to satisfy the following expressions (ii) and (iii).
  • NDTT 1 and NDTT 2 are non-ductile transition temperatures (° C.) according to the NRL drop weight test using the type P3 test piece collected from the 1 mm depth positions of the first surface 11a and the second surface 11b, respectively.
  • a type P3 test piece specified in ASTM E208 is taken from each of the first surface 11a side and the second surface 11b side.
  • the type P3 test piece is a test piece having a length of 130 mm, a width of 50 mm and a thickness of 16 mm.
  • each of the first surface 11a and the second surface 11b is shaved by 1 mm, and then the test piece is sampled so that the thickness direction thereof matches the plate thickness direction of the bonding member 11. That is, the test piece is sampled from the region from the 1 mm depth position to the 17 mm depth position of the first surface 11a and the second surface 11b.
  • the test is conducted so that cracks occur on the surface perpendicular to the longitudinal direction of the test piece.
  • a crack is generated on a surface perpendicular to the extending direction of the first welded portion 13a and the second welded portion 13b. Therefore, the test piece is sampled so that its longitudinal direction coincides with the extending direction of the welded portion of the welded structure.
  • NRL drop weight test based on ASTM E208 is carried out. Specifically, first, a weld bead extending in a direction parallel to the longitudinal direction of the test piece is formed on the surface of the surface of the joining member which is perpendicular to the thickness direction of the test piece. At that time, as the welding material, a welding material with low toughness specified in ASTM E208 is used. The length of the weld bead is adjusted to 60 to 70 mm and the width is adjusted to 12 to 16 mm. Then, a cutout parallel to the width direction of the test piece is formed on the weld bead. At this time, the width of the notch is 1.5 mm or less, and the distance between the groove bottom of the notch and the test piece is adjusted to be in the range of 1.8 to 2.0 mm.
  • Break with crack propagation
  • No Break without crack propagation
  • Break is determined by investigating the state in which the brittle crack generated from the notch propagates to the test piece.
  • Break with crack propagation
  • No Break without crack propagation
  • the test result is determined to be Break (with crack propagation). If the crack does not reach the widthwise end, the test result is judged as No Break (no crack propagation).
  • test pieces are used, for example, starting from a condition of ⁇ 100° C. and changing the test temperature at 5° C. intervals (in the case of No Break, decrease by 5° C., Break In the case of 5°C increase), the temperature that is 5°C lower than the lowest test temperature at which No Break was obtained for both two test pieces is the non-ductile transition temperature.
  • the yield stress of the joining member is preferably 400 to 580 MPa, and the tensile strength is preferably 510 to 750 MPa.
  • the yield stress of the joining member is more preferably 410 to 570 MPa, and the tensile strength is more preferably 520 to 740 MPa.
  • the manufacturing method of the welded structure is not particularly limited, but, for example, a step of selecting a joining member whose non-ductile transition temperature of the surface layer portion satisfies the above-mentioned conditions, and It is possible to manufacture by performing the process of welding to the joining member.
  • the joining member side of the joining member be groove processed.
  • the groove processing may be performed over the entire end surface of the joining member, or may be performed only at a joining portion with the joined member.
  • the welding method is also not particularly limited, and a known method such as CO 2 welding or covered arc welding (SMAW) may be adopted.
  • SMAW covered arc welding
  • the non-ductile transition temperature in the surface layer portion of the one surface (first surface) and the other surface (second surface) was investigated. .. Specifically, after the first surface and the second surface were each shaved off by 1 mm, the thickness direction of the test piece coincided with the plate thickness direction of the steel plate and the longitudinal direction of the test piece was welded from each surface. The type P3 test piece specified in ASTM E208 was sampled so as to match the stretching direction of the part. Then, using the test piece, an NRL drop weight test according to ASTM E208 was carried out, and non-ductile transition temperatures NDTT 1 (°C) and NDTT 2 (°C) were obtained.
  • a welded joint obtained by joining a steel plate having a plate thickness of 100 mm by CO 2 welding was used as a run-up welded joint (member to be joined 12), and a welded structure 10 was produced by CO 2 welding or covered arc welding (SMAW) under the conditions shown in Table 2. ..
  • the notch 16b was introduced into the fusion line portion 16a of the welded structure 10. Then, the welded structure 10 is cooled to a ship design temperature of ⁇ 10° C., a test stress of 257 MPa corresponding to the design stress of EH40 is applied, and only the vicinity of the notch is rapidly cooled to about ⁇ 50° C. An impact was applied through the wedge to generate and propagate a brittle crack.
  • the measured shape of the weld is also shown in Table 2, and the results of the test using the above structural model arrest specimen are shown in Table 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Arc Welding In General (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
PCT/JP2018/047975 2018-12-26 2018-12-26 溶接構造体 WO2020136777A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2019519786A JP6562189B1 (ja) 2018-12-26 2018-12-26 溶接構造体
KR1020207003064A KR102105614B1 (ko) 2018-12-26 2018-12-26 용접 구조체
CN201880054150.7A CN111315650B (zh) 2018-12-26 2018-12-26 焊接构造体
PCT/JP2018/047975 WO2020136777A1 (ja) 2018-12-26 2018-12-26 溶接構造体

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2018/047975 WO2020136777A1 (ja) 2018-12-26 2018-12-26 溶接構造体

Publications (1)

Publication Number Publication Date
WO2020136777A1 true WO2020136777A1 (ja) 2020-07-02

Family

ID=67690501

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/047975 WO2020136777A1 (ja) 2018-12-26 2018-12-26 溶接構造体

Country Status (4)

Country Link
JP (1) JP6562189B1 (ko)
KR (1) KR102105614B1 (ko)
CN (1) CN111315650B (ko)
WO (1) WO2020136777A1 (ko)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023007860A1 (ja) * 2021-07-26 2023-02-02 日本製鉄株式会社 溶接構造体、ならびにその設計方法および施工方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7288196B2 (ja) * 2019-12-16 2023-06-07 日本製鉄株式会社 溶接構造体

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS548396B2 (ko) * 1973-04-14 1979-04-14
JPH11192555A (ja) * 1998-01-07 1999-07-21 Kobe Steel Ltd サブマージアーク溶接方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100537104C (zh) * 2003-10-08 2009-09-09 新日本制铁株式会社 抗脆性裂纹传播性优异的焊接结构体及其焊接方法
JP5144053B2 (ja) 2006-05-12 2013-02-13 Ｊｆｅスチール株式会社 脆性亀裂伝播停止特性に優れる溶接構造体
KR101427706B1 (ko) 2011-09-13 2014-08-07 제이에프이 스틸 가부시키가이샤 용접 구조체
BR112014025358B1 (pt) * 2012-05-10 2019-01-15 Jfe Steel Corporation estrutura soldada

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS548396B2 (ko) * 1973-04-14 1979-04-14
JPH11192555A (ja) * 1998-01-07 1999-07-21 Kobe Steel Ltd サブマージアーク溶接方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023007860A1 (ja) * 2021-07-26 2023-02-02 日本製鉄株式会社 溶接構造体、ならびにその設計方法および施工方法
JP7299554B1 (ja) * 2021-07-26 2023-06-28 日本製鉄株式会社 溶接構造体、ならびにその設計方法および施工方法
KR20230162021A (ko) 2021-07-26 2023-11-28 닛폰세이테츠 가부시키가이샤 용접 구조체, 그리고 그 설계 방법 및 시공 방법

Also Published As

Publication number Publication date
CN111315650A (zh) 2020-06-19
CN111315650B (zh) 2021-04-23
KR102105614B1 (ko) 2020-04-28
JP6562189B1 (ja) 2019-08-21
JPWO2020136777A1 (ja) 2021-02-15

Similar Documents

Publication Publication Date Title
KR101163350B1 (ko) 내취성 균열 전파성이 우수한 용접 구조체
JP2005144552A (ja) 耐脆性破壊発生特性に優れた大入熱突合せ溶接継手
WO2020136777A1 (ja) 溶接構造体
Barreda et al. Influence of the filler metal on the mechanical properties of Ti–6Al–4V electron beam weldments
JP4772922B2 (ja) 耐脆性き裂伝播性に優れた溶接構造体
KR102398807B1 (ko) 겹침 레이저 용접 조인트, 겹침 레이저 용접 조인트의 제조 방법 및 자동차용 골격 부품
JP2005131708A (ja) 耐脆性き裂伝播性に優れた溶接構造体およびその溶接方法
JP2007098441A (ja) 耐脆性き裂伝播性に優れた溶接構造体
JP4797953B2 (ja) 疲労強度に優れた溶接継手
JP4818466B1 (ja) 耐脆性き裂伝播性を有する溶接構造体
JP6562190B1 (ja) 溶接構造体
JP2020041966A (ja) 厚鋼板の品質評価方法
KR102119175B1 (ko) 용접 구조체
JP7288197B2 (ja) 溶接構造体
KR101197884B1 (ko) 용접 구조물
JP7288196B2 (ja) 溶接構造体
JP7299554B1 (ja) 溶接構造体、ならびにその設計方法および施工方法
JP2005125348A (ja) 耐脆性破壊発生特性に優れた大入熱突合せ溶接継手
JP4818467B1 (ja) 耐脆性き裂伝播性に優れた溶接継手及び溶接構造体
KR102506231B1 (ko) 용접 구조체
JP2022083554A (ja) 溶接構造体の脆性亀裂伝播停止性能の評価方法
JP2019181498A (ja) 溶接継手
Cicholska The influence of welding on the hardness and weldability of thermally hardened S620Q steel sheets

Legal Events

Date Code Title Description
ENP Entry into the national phase

Ref document number: 2019519786

Country of ref document: JP

Kind code of ref document: A

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18945081

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18945081

Country of ref document: EP

Kind code of ref document: A1