CN109311126A - The excellent welding structural body of brittle-cracking propagation stopping characteristics - Google Patents

The excellent welding structural body of brittle-cracking propagation stopping characteristics Download PDF

Info

Publication number
CN109311126A
CN109311126A CN201780036808.7A CN201780036808A CN109311126A CN 109311126 A CN109311126 A CN 109311126A CN 201780036808 A CN201780036808 A CN 201780036808A CN 109311126 A CN109311126 A CN 109311126A
Authority
CN
China
Prior art keywords
engagement member
welding
component
structural body
fillet
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CN201780036808.7A
Other languages
Chinese (zh)
Other versions
CN109311126B (en
Inventor
半田恒久
伊木聪
大井健次
丰田昌信
木治升
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
JFE Engineering Corp
Japan Marine United Corp
Universal Shipbuilding Corp
Original Assignee
NKK Corp
Universal Shipbuilding Corp
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 NKK Corp, Universal Shipbuilding Corp filed Critical NKK Corp
Publication of CN109311126A publication Critical patent/CN109311126A/en
Application granted granted Critical
Publication of CN109311126B publication Critical patent/CN109311126B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
    • B63B73/40—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms characterised by joining methods
    • B63B73/43—Welding, e.g. laser welding
    • 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
    • B23K9/0206—Seam welding; Backing means; Inserts of horizontal seams in assembling vertical plates, a welding unit being adapted to travel along the upper horizontal edge of the 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
    • B23K9/00—Arc welding or cutting
    • 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
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

A kind of welding structural body, make the ratio between plate thickness td and the wide Wd of plate td/Wd less than 2 double component be overlapped in plate thickness 50mm or more by the surface of engagement member and engaged using fillet welding, and then engagement member is engaged using welding in the component surface that doubles of fillet welding, to be formed as welding structural body.The surface that doubles component be 95% or more the non-welded portion for doubling the plate thickness td of component in contact cross-section by being formed on the faying surface on the surface of engagement member.And, adjusting angle welding rod part, so that fillet weld metal fracture transition critical-temperature vTrs (DEG C) correspond to the long L of fillet welding foot and in the relationship of the plate thickness tf by engagement member, meet vTrs≤- 5L+65-1.5 in the case where L>=20mm and (tf-75) ‥ ‥ (1b), meets vTrs≤- 35-1.5 (mode of tf-75) ‥ ‥ (1c), the toughness of adjusting angle weld metal in the case where L<20mm.Thereby, it is possible to provide a kind of propagation that can be prevented using fillet weld metal portion from the brittle crack generated by engagement member or engagement member, welding structural body that be suitable as hull configuration, that brittle-cracking propagation stopping characteristics are excellent.

Description

The excellent welding structural body of brittle-cracking propagation stopping characteristics
Technical field
The present invention relates to such as Large Container Ship or bulk carrier etc., use thick steel plate be soldered construction welding steel Works, more particularly to the propagation of the brittle crack generated from thick steel plate base material or welded-joint can be made to reach structure Welding structural body stop before the large-scale damage of object, that brittle-cracking propagation stopping characteristics are excellent.
Background technique
Container ship or bulk carrier are for the raising of delivered payload capability or the raising of the efficiency of loading and unloading etc., no with such as oil tanker etc. Together, the partition wall in cabin is few, the big structure in the opening portion with ship top.Therefore, special in container ship or bulk carrier It is not that hull outside plate needs high intensity or wall thickening.
In addition, container ship is enlarged in recent years, start construction 6, argosy as 000~22,000TEU.Here, TEU (Twenty feet Equivalent Unit) indicates the number for being converted into 20 feet of length of container, indicates container The index of the delivered payload capability of ship.Along with the enlargement of such ship, hull outside plate, which is in, to be 50mm or more using plate thickness and bends Taking intensity is 390N/mm2Grade or more thick steel plate tendency.
Steel plate as hull outside plate is in recent years from the viewpoint of the shortening of construction period is such, for example, by electrogas arc welding The case where carrying out butt welding Deng big input heat welding is increased.In such big input heat welding, hold in welding heat affected zone It is also easy to produce significantly toughness decline, becomes a reason of the brittle crack generated from welded-joint.
In hull configuration, in the past from the viewpoint of safety is such, need that brittle break has occurred even if contingency In the case of, also the propagation of brittle crack can be made to stop before reaching large-scale damage, prevent hull from separating.
Such consideration method is accepted, non-patent literature 1 reports the weldering for making ship plate for being less than 50mm about plate thickness The experimental discussion result of the brittle-cracking propagation behavior of socket part.
In the non-patent literature 1, the propagation road of the brittle crack forcibly generated in weld part is experimentally investigated Diameter, dissemination, if describing ensures the destruction toughness of weld part to a certain degree, due to the influence of weld residual stress And brittle crack the case where becoming separated in flight from weld part to base material side, is more as a result, the example that still brittle crack is propagated along weld part Son has also confirmed many cases.Such case imply that cannot assert brittle break not along weld part carry out straight propagation can The case where energy property.
However, in addition to the steel of 50mm will be less than suitable for plate thickness with same the welding of welding being applicable in non-patent literature 1 Plate and the ship built can not navigate by water except the presence of such more actual conditions with having any problems, and good from toughness The understanding of steel plate mother metal (E grades of steel of the shipbuilding etc.) ability that fully keeps making brittle crack to stop set out, make ship steel The brittle-cracking propagation stopping characteristics of weld part do not specially require ship's classification rule etc..
However, be in recent years more than the plate thickness of the steel plate in the Large Container Ship of 6,000TEU, used be more than 50mm, Other than destroying the decline of toughness caused by plate thickness increases, due to the big input heat weldering bigger using welding heat input It connects, therefore the destruction toughness of weld part is in further lowering of tendency.In the big input heat welding point of such heavy wall, The brittle crack generated from weld part is shown not return and straight to base material side, and it may also in the steel plate mother metals such as aggregate portion The case where will not stopping (such as non-patent literature 2).Therefore, in the ship for the thick high-strength steel plate for being applicable in plate thickness 50mm or more In body structure, safety ensures to become big problem.
In addition, having also indicated that especially for the propagation of the brittle crack generated is stopped, having needed in non-patent literature 2 There is the case where thick steel plate of special brittle-cracking propagation stopping characteristics.
The welding of the planking preferably more than plate thickness 50mm is described for such problems, such as patent document 1 In structural body, aggregate, and the welding structural body formed using fillet welding engagement are configured in a manner of intersecting with butt welding portion.
In the technology described in Patent Document 1, as aggregate (reinforcement material), use every in surface section and backing layer portion Average circle suitable partial size of the thickness of 3mm or more with 0.5~5 μm and then (100) crystal plane at the face parallel with plate thickness surface X-ray surface intensity than for 1.5 or more, steel plate with miniature tissue.By by such steel plate with miniature tissue It is set as having carried out the structure of fillet welding as reinforcement material, even if brittle crack is generated in butt joint portion, by as reinforcement The aggregate of material can also be such that brittle break stops, and can prevent welding structural body from destroying such fatefulue damage.
In addition, patent document 2, which describes to have, carries out fillet welding on by engagement member (flange) for engagement member (web) And corner joint, the excellent welding structural body of brittle-cracking propagation stopping characteristics formed.
In the welding structural body described in Patent Document 2, web in corner joint section is docked with flange Face remaining has non-welded portion, so that the ratio of the sum of the foot length of the left and right in the width of the non-welded portion and fillet weld portion and web plate thickness X and the mode for being met special relational expression by the brittle-cracking propagation Stopping Ability Kca of engagement member (flange) adjust non-welded The width in portion.The thick material for being as a result, 50mm or more even with plate thickness is used as by engagement member (flange), can also make engaging The propagation of brittle crack that component (web) generates stops at the web in fillet weld portion and the interface of flange, prevents to being connect Close the propagation of the brittle crack of component (flange).
In addition, patent document 3~5, which also describes to have, is carrying out angle by engagement member (flange) for engagement member (web) The excellent welding structural body of corner joint, brittle-cracking propagation stopping characteristics made of weldering.
Patent document 3 describes a kind of welding structural body, has the end face for making engagement member and quilt more than plate thickness 50mm It docks and is carried out engaging the weldering to be formed by fillet welding by engagement member with described by the engagement member in the surface of engagement member At least one party of foot length or deposition width is 16mm corner joint below, wherein in corner joint by engagement member The face docked with by the surface of engagement member of end face on have be in the section of corner joint the engagement member plate thickness tw 95% or more non-welded portion, the also charpy impact test fracture transition stagnation temperature with the fillet weld metal in corner joint Degree vTrs with the Xia Shi that meets vTrs≤- 1.5tf+70 and/or fillet weld metal in the relationship of the plate thickness tf by engagement member Absorption energy vE at -20 DEG C of test temperature of impact test-20(J) with meet in the relationship of the plate thickness tf by engagement member vE-20The fillet weld metal of >=2.75tf-105.
Also, if it is such welding structural body, then can will reach in the brittle crack generated by engagement member Fillet weld metal is utilized to prevent to propagate before large-scale damage.
In addition, patent document 4 describes a kind of welding structural body, have the end face for making engagement member and plate thickness 50mm or more By the surface docking of engagement member and the engagement member and described engaged by engagement member using fillet welding are formed Leg length or deposition width at least one party be 16mm corner joint below, wherein in corner joint will engagement There is the plate in the section of corner joint for the engagement member on the face that the end face of component is docked with by the surface of engagement member 95% or more the non-welded portion of thick tw, the charpy impact test fracture transition also with the fillet weld metal in corner joint face Boundary temperature vTrs with meet in the relationship of the plate thickness tf by engagement member vTrs (DEG C)≤- 1.5tf+90 and/or fillet weld gold The test temperature of the charpy impact test of category is the absorption energy vE at -20 DEG C-20(J) with by the plate thickness tf's of engagement member Meet vE in the case where 50≤tf (mm)≤53 in relationship-20>=5.75, meet vE in the case where tf (mm) > 53-20(J)≥ The fillet weld metal of 2.75tf-140, in addition, engagement member is in the case where sharing temperature by brittle-cracking propagation stopping toughness Kca 2500N/mm 2/3Above steel plate is constituted.
Also, by being set as such welding structural body, brittle crack can be in fillet weld portion or the base material of engagement member Stop propagating.
In addition, patent document 5 describes a kind of welding structural body, have the end face for making engagement member and plate thickness 50mm or more By the surface docking of engagement member and the engagement member and described engaged by engagement member using fillet welding are formed Leg length or at least one party of deposition width be 16mm corner joint below, wherein engagement member and by engagement member All be set as the component with butt joint portion, the welding metal in butt joint portion have with vTrs be calculated as -65 DEG C or less and/or with vE-20Be calculated as the toughness of 140J or more, in corner joint, by the welding end surface in the butt joint portion of engagement member with connect The weld part surface docking for closing the butt joint portion of component, has in the butt joint section of corner joint on the face of docking For 95% or more the non-welded portion of the plate thickness tw of the engagement member, the Xia Shi also with the fillet weld metal in corner joint is rushed Hit test fracture transition critical-temperature vTrs with meet vTrs (DEG C)≤- 1.5tf+ in the relationship of the plate thickness tf by engagement member 90 and/or fillet weld metal charpy impact test test temperature be -20 DEG C at absorption energy vE-20(J) with connect In the relationship for closing the plate thickness tf of component, meet vE in the case where 50≤tf (mm)≤53-20>=5.75, in the feelings of tf (mm) > 53 Meet vE under condition-20(J) >=2.75tf-140 fillet weld metal.
Also, by being set as such welding structural body, brittle crack energy at the base material of fillet weld portion or engagement member It is enough to stop.
In addition, by being set as such welding structural body, from the brittle crack generated by engagement member weld part or from connecing It closes the brittle crack that Member Welding portion generates and utilizes the weld part in fillet weld portion or engagement member or the weld part by engagement member It can prevent to propagate.
Citation
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2004-232052 bulletin
Patent document 2: Japanese Unexamined Patent Publication 2007-326147 bulletin
Patent document 3: No. 5395985 bulletins of Japan Patent
Patent document 4: No. 5365761 bulletins of Japan Patent
Patent document 5: No. 5408396 bulletins of Japan Patent
Non-patent literature
Non-patent literature 1: the 147th research department's meeting of Japan Shipbuilding Research Association: " the big input heat of hull high-tensile steel The correlative study of the brittle break intensity evaluation of connector ", No. 87 (2 months 1978), p.35~53, Japan Shipbuilding Research Association
Non-patent literature 2: mountain pass is glad more etc.: " the reality of the new high-intensitive pole thick steel plate of the exploitation-of super-container vessel Border application-", Japanese ship ocean engineering can magazine, No. 3 (2005), p.70~76, Heisei in November, 17
Non-patent literature 3: (" the destruction management control of hull configuration is set the 169th committee report of Japan Shipbuilding Research Association Correlative study-report-of meter ", (1979), p.118~136, the 169th committee of Japan Shipbuilding Research Association)
Summary of the invention
Subject to be solved by the invention
However, the aggregate used in technology described in Patent Document 1 as reinforcement material be set as being formed with it is desired The steel plate of tissue, it is therefore desirable to which complicated process, productivity decline exist and is difficult to steadily ensure to have desired tissue The problem of steel plate.
In addition, technology described in Patent Document 2 is to split the brittleness generated at engagement member (hereinafter also referred to as web) Line is wanted by the discontinuity of structure and by the brittle-cracking propagation Stopping Ability of engagement member (hereinafter also referred to as flange) The technology for combining to be prevented.However, as shown in non-patent literature 3, experimental confirmed usually will be in corner joint The brittle crack generated at engagement member (flange) stops propagation ratio by engagement member (web) will be in engagement member (abdomen Plate) at the brittle crack that generates pass through stopped propagating by engagement member (flange) it is difficult.
Its reason also understands not yet explicitly, but as one of reason, it is contemplated that crackle rushes in destruction when T connector portions Driving force (stress magnification factor) the case where increasing when specific impulse is by engagement member (flange) when rushing in engagement member (web).
According to such situation, in technology described in Patent Document 2, the brittle-cracking propagation of engagement member (web) stops Only characteristic etc. is insufficient, therefore the brittle crack generated at by engagement member (flange) is stopped by engagement member (web) It is sufficient technology that the case where propagation, which can not be said,.That is, " brittle crack of the technology described in Patent Document 2 for such as NK ship's classification It is produced at the strength deck (being equivalent to flange) in Large Container Ship imagined in prevention design guideline " (in September, 2009 is formulated) Raw brittle crack propagates such situation to hatch side coaming (being equivalent to web), can not say it is that there is sufficient crackle to pass Broadcast stop performance.
In addition, needing fillet welding foot long (or deposition width) being constrained to 16mm in the technology that patent document 3~5 is recorded Hereinafter, therefore from the viewpoint of ensuring fillet weld portion intensity and engagement member (web) and by engagement member (flange) be applicable in The limit of maximum plate thickness is 80mm.However, the extremely thicknessization of component further develops, in nearest Large Container Ship It is applicable in the steel of plate thickness 100mm.It is such be more than the heavy wall component of 80mm in the case where, there are almost impossible applicable patents The problem of technology that document 3~5 is recorded.
In addition, even if in the case where the plate thickness of component is less than 80mm, in practice of construction at the scene, due to fillet weld portion Foot it is long variation it is big, therefore the intensity in fillet weld portion ensures ensuring for (fillet welding foot length ensures) and brittle crack prevention performance It is set up while (fillet welding foot length is limited to 16mm or less) and needs huge labour in construction management at the scene, and existed and repair Just equal adding cost increases such problems.
The present invention solves above-mentioned problem of the prior art, its purpose is to provide it is a kind of will be by engagement member (flange) The propagation to engagement member (web) of the brittle crack of generation and the brittle crack generated at engagement member (web) to connecing The propagation for closing component (flange) can stop (prevention), brittle-cracking propagation stopping characteristics before reaching large-scale damage Excellent welding structural body.
Solution for solving the problem
The present inventors in order to achieve the above purpose, subtract about in the construction in the fillet weld portion for stopping brittle crack The countermeasure of the long variation of the foot in few fillet weld portion has carried out careful discussion.
As a result, contemplate by basic welding structure from previous fillet welding structure change into engagement member with engaged Be provided with the fillet welding structure for doubling component of being attached to for doubling component between component, the propagating through of brittle crack double component and by The fillet weld metal portion of engagement member is come the case where prevention.If it is the fillet welding structure, then the angle for stopping brittle crack The construction of welding seam part can be welded in factory.Moreover, predict as a result, the variation that is easy to make the foot in fillet weld portion long at In the range of regulation, associated situation is greatly decreased with the practice of construction cost at scene.
Also, the engagement member carried out at the stringent scene of construction management and the engagement energy for doubling component are predicted as a result, It is enough to dock the end face of engagement member with the surface for doubling component, it is (partial penetration, complete in the easy welding condition of construction management Penetration etc.) under the case where constructing.
In addition, the brittle-cracking propagation that the present inventors have also carefully discussed the fillet welding structure for incidentally doubling component stops Only characteristic impact it is various will be because.
As a result, contemplate, in order to prevent (stopping) from the propagation of the brittle crack generated by engagement member (flange), Ensure discontinuous portion on by engagement member (flange) and the faying surface for doubling component, and in view of when by engagement member (flange) Plate thickness tf (mm) energy release rate (crack progress driving force) of brittle crack front end increases when increasing, brittle crack is difficult to stop Only the case where, it is contemplated that with improved that become must by the toughness in the associated fillet weld portion plate thickness tf (mm) of engagement member (flange) The case where palpus.
In addition, when the foot in fillet weld portion is long or deposition width is elongated, the propagation of brittle crack is become easy, therefore also pre- The case where needing the toughness according to fillet welding foot long (or deposition width) to ensure fillet weld metal is seen.
On the other hand, it is also foreseen that following situation: propagation about the brittle crack generated from engagement member (web) Prevention (stopping), be mostly more easier than the prevention (stopping) of the propagation from the brittle crack generated by engagement member (flange) Situation, but when the plate thickness td for doubling component is increased to 2 times or more relative to the wide Wd of plate for doubling component, from engagement member The prevention (stopping) of the propagation for the brittle crack that (web) generates is than the biography from the brittle crack generated by engagement member (flange) The prevention (stopping) broadcasting is more difficult.
The present invention is based on above-mentioned opinions, complete by further discussing.
That is, purport of the invention is as described below.
(1) a kind of welding structural body, wherein the brittle-cracking propagation stopping characteristics of the welding structural body are excellent, described Welding structural body is the fillet welding structural body for doubling component that is attached to for having corner joint, and the corner joint is by by engagement member End face butt welding be engaged in the surface for doubling component and double component welded corner joint being engaged together in plate thickness 50mm or more for described The surface of component and formed, in the corner joint described in double the surface and the surface by engagement member of component Having on faying surface is 95% or more the non-welded portion for doubling the wide Wd of plate of component in the section of the corner joint, into And the ratio between the plate thickness td for doubling component and the wide Wd of plate td/Wd meet following (1a) formulas, in turn, by the corner joint Fillet weld metal is set as following fillet weld metal: the charpy impact test fracture transition critical-temperature of the fillet weld metal VTrs (DEG C) correspond to fillet welding foot long or deposition width L and with described by the plate thickness tf of engagement member and fillet welding foot be long or deposition Meet following (1b) formulas or following (1c) formulas in the relationship of width L.
td/Wd<2‥‥(1a)
In the case where L >=20mm, vTrs≤- 5L+65-1.5 (tf-75) ‥ ‥ (1b)
In the case where L < 20mm, vTrs≤- 35-1.5 (tf-75) ‥ ‥ (1c)
Here, vTrs: the charpy impact test fracture transition critical-temperature (DEG C) of fillet weld metal,
Tf: by the plate thickness (mm) of engagement member,
Td: doubling the plate thickness (mm) of component,
Wd: the plate for doubling component is wide (mm),
L: fillet welding foot length or deposition width (mm)
(2) welding structural body according to (1), wherein described to be intersected by engagement member with the engagement member Direction has butt joint portion.
(3) welding structural body according to (2), wherein the engagement member has butt joint portion, so that the engagement The engagement member is arranged with the mode intersected by the butt joint portion of engagement member in the butt joint portion of component.
Invention effect
In accordance with the invention it is possible to which will be difficult to realize is being 50mm or more by plate thickness and then plate thickness is more than the thickness of 80mm in the past Steel plate constitute by engagement member (flange) generate brittle crack to the propagation of engagement member (web) and in engagement member The brittle crack that (web) generates stops before reaching large-scale damage to this two side by the propagation of engagement member (flange) Or it prevents.
According to the invention it is thus possible to avoid steel structure, the especially hull of Large Container Ship or bulk carrier etc. The risk of the large-scale brittle break of separation etc., can bring big effect in terms of the safety for ensuring hull configuration, Special effect is played in industry.
In addition, according to the present invention, it may have following effect: in construction, by adjusting the size and angle for doubling component The toughness of weld metal without using special steel plate, and will not damage safety, can be easily manufactured by brittle crack The excellent welding structural body of propagation halt characteristic.
Detailed description of the invention
Fig. 1 is the explanatory diagram for schematically illustrating the cross section structure of corner joint.Fig. 1 (a) shows engagement member (web) 1 With double component 10 and by the orthogonal situation of engagement member (flange) 2, Fig. 1 (b) shows engagement member (web) 1 and doubles component 10 and the case where obliquely intersected by engagement member (flange) 2.
Fig. 2 is another explanatory diagram for schematically showing the structure of corner joint.Fig. 2 (a) is outside drawing, Fig. 2 (b) It is cross-sectional view.
Fig. 3 is another explanatory diagram for schematically showing the structure of corner joint.Fig. 3 (a) is outside drawing, Fig. 3 (b) It is cross-sectional view.
Fig. 4 is shown schematically in used in embodiment from by the brittleness of engagement member (flange) generation/propagation Crackle is the explanatory diagram of the shape of the ultra-large type structural model test body of object.Fig. 4 (a) be by engagement member (flange) 2 only by The case where steel plate mother metal is constituted, Fig. 4 (b) is that had the case where butt joint portion by engagement member (flange) 2, and Fig. 4 (c) is engagement Component (web) 1 and the case where butt joint portion, is had by engagement member (flange) 2.
Fig. 5 is shown schematically in used in embodiment to split from the brittleness of engagement member (web) generation/propagation Line is the explanatory diagram of the shape of the ultra-large type structural model test body of object.Fig. 5 (a) is engagement member (web) 1 only by steel plate The case where base material is constituted, Fig. 5 (b) is that engagement member (web) 1 has the case where butt joint portion, and Fig. 5 (c) is engagement member (web) 1 and the case where butt joint portion, is had by engagement member (flange) 2.
Specific embodiment
Hereinafter, specifically describing the present invention.
Welding structural body of the invention is the welding structural body for having corner joint, and the corner joint is to make engagement member 1 end face is docked with the surface for doubling component 10, engagement member 1 is engaged with component 10 is doubled, and make to double component 10 and plate The surface by engagement member 2 of thick 50mm or more is overlapped, and carries out engaging the corner joint constituted by fillet welding.The welding structure Body has the corner joint for the fillet weld metal 5 for being Lmm with leg length 3 or deposition width 13, in adding for the corner joint Times component 10 with by there are the non-welded portions 4 for becoming structure discontinuous portion on the faying surface of engagement member (flange) 2.It needs It is bright, in welding structural body of the present invention, in the interface for docking the end face of engagement member 1 with the surface for doubling component 10 On also may include structure discontinuous portion.
The state is as shown in Figure 1 in contact cross-section.It should be noted that Fig. 1 (a) is shown engagement member (web) 1 The case where being erectly installed on by engagement member (flange) 2, but it is not limited to this in the present invention.Such as Fig. 1 (b) institute Show, 1 tilt angle theta of engagement member (web) can also be installed on by engagement member (flange) 2.
As described above, welding structural body of the invention double component 10 with by the faying surface of engagement member (flange) 2 With the discontinuous non-welded portion 4 of structure.In welding structural body of the invention, component 10 is doubled and by engagement member (flange) 2 faying surface becomes the propagation face of brittle crack, therefore in the present invention, in faying surface, there are non-welded portions 4.Due to non-welded The presence in portion 4, the energy in engagement member (web) 1 or the brittle crack front end propagated in engagement member (flange) 2 discharge Rate (crack progress driving force) decline, at faying surface, brittle crack is easy to stop.
Therefore, in the present invention, the fillet weld metal 5 for keeping the toughness of regulation or more is formed, is made by fillet weld metal 5 Brittle crack stops.
It should be noted that brittle crack is extremely rare the case where the few steel plate mother metal portion of defect generates.It is past crisp Property the most of of malicious event occur in weld part.Therefore, it is for example being set as utilizing butt joint 22 by engagement member (flange) 2 Come the steel plate engaged and by engagement member (web) in a manner of intersecting with the weld part of the butt joint (butt joint portion) 22 It has carried out the corner joint as shown in Figure 2 of fillet welding or engagement member (web) 1 and has all been set by engagement member (flange) 2 For the steel plate with butt joint portion 12,22 and by the butt joint portion 22 of engagement member (flange) 2 and engagement member (abdomen Plate) 1 the corner joint as shown in Figure 3 that intersects of butt joint portion 12 in, be provided to prevent from butt joint portion 12 or The case where propagation of 22 brittle cracks generated, firstly, there are the discontinuous portions of structure, is most important.
Therefore, in the present invention, fillet weld portion by engagement member with double component faying surface on there are non-welded Portion's (discontinuous portion of structure) 4.
It should be noted that Fig. 2 (a) shows the appearance of corner joint, Fig. 2 (b) shows the section shape in butt joint portion 22 Shape.Moreover, Fig. 3 shows in engagement member (web) 1 and is with butt joint portion 12,22 by engagement member (flange) 2 In the case where steel plate, handed over by the butt joint portion 22 of engagement member (flange) 2 and the butt joint portion 12 of engagement member (web) 1 The corner joint of fork.Fig. 3 (a) shows the appearance of corner joint, and Fig. 3 (b) shows the contact cross-section shape in butt joint portion 12,22 Shape.
It should be noted that show a case that butt joint portion 22 is orthogonal with web 1 in Fig. 2, Fig. 3, but at this This is not limited in invention.Intersection can certainly be tilted.
In addition, the manufacturing method of welding structural body does not need to be particularly limited to, common manufacturing method can be applicable in.Example Such as, can also by flange with steel plate each other, web with steel plate carry out butt welding each other, by obtained butt joint via doubling component Fillet welding is carried out to manufacture welding structural body.Furthermore, it is also possible to by one group of web before butt welding with steel plate temporary weld in flange table Face doubles component, next web is carried out butt welding with steel plate each other, obtained butt joint is manufactured to flange welding Welding structural body.
In the present invention, in order to inhibit the propagation of brittle crack, the size of the non-welded portion 4 in corner joint section be set as plus 95% or more of times surface member width Wd.If the size (width B) 16 of non-welded portion 4 is less than double surface member width Wd 95%, The plastic deformation of fillet weld metal is suppressed, and the crackle front end for rushing in the brittle crack of fillet weld metal nearby becomes height and answers Power, it is difficult to stop or prevent brittle crack.Therefore, in order to inhibit the propagation of brittle crack, the size (width B) of non-welded portion 4 16 are limited to double 95% or more of surface member width Wd.It should be noted that preferably 96% or more and 100% or less.
In addition, in the present invention, so as to double the plate thickness td of component and double the ratio between the wide Wd of plate of component td/Wd satisfaction such as Under (1a) formula mode, adjustment doubles the size of component.
td/Wd<2‥‥(1a)
In the case where the plate thickness td for doubling component and the wide Wd of plate for doubling component are unsatisfactory for (1a) formula, from engagement member The stopping of the propagation for the brittle crack that (web) generates is prevented than the biography from the brittle crack generated by engagement member (flange) The stopping or prevention broadcast become difficult, can not will from engagement member (web) and by engagement member (flange) generate brittle crack Propagation stop or prevent together.
It should be noted that the longitudinal rigid decline for doubling component, therefore td/ can be led to the problem of when td/Wd is too small The lower limit value of Wd is preferably set to 0.2.
In addition, in the present invention, the toughness of adjusting angle weld metal as follows: correspond to that fillet welding foot is long or deposition is wide Spend L, and in relationship long or deposition width L by the plate thickness tf of engagement member and fillet welding foot, meet following (1b) formula or such as Under (1c) formula.
In the case where L >=20mm, vTrs≤- 5L+65-1.5 (tf-75) ‥ ‥ (1b)
In the case where L < 20mm, vTrs≤- 35-1.5 (tf-75) ‥ ‥ (1c)
(here, vTrs: the charpy impact test fracture transition critical-temperature (DEG C) of fillet weld metal, tf: by engagement member Plate thickness (mm), L: fillet welding foot is long or deposition width (mm))
It should be noted that L is long using fillet welding foot, a small side in deposition width.
The toughness of fillet weld metal is associated with by the plate thickness tf of engagement member (flange), the long L of fillet welding foot, on meeting (1b) formula or (1c) formula stated, about the welding for being 50mm or more by the plate thickness of engagement member (flange) and engagement member (web) Structural body is capable of forming to ensure that desired brittle-cracking propagation prevents the welding structural body of performance.In fillet weld metal Toughness be unsatisfactory for above-mentioned (1b) formula or (1c) formula in the case where, the toughness of fillet weld metal is insufficient, utilizes fillet weld metal Portion can not be prevented in the brittle crack for being generated and being propagated by engagement member (flange) or engagement member (web).
In this way, if it is double component meet above-mentioned (1a) formula, fillet weld metal with by engagement member (flange) The welding structural body for meeting above-mentioned (1b) formula or (1c) formula in the relationship of long (deposition width) L of plate thickness tf, fillet welding foot, then can It prevents to generate in the brittle crack generated by engagement member (flange) and at engagement member (web) together by fillet weld metal Brittle crack propagation.
It should be noted that welding structural body of the invention has above-mentioned corner joint, for example, can be suitable for ship Be flange and using next door as the hull configuration of web using hull outside plate, or using deck be flange and using hatch as the ship of web Body structure etc..
Embodiment
Hereinafter, being based on embodiment, the present invention will be described in detail.
Use the thick steel plate of plate thickness shown in table 1-1 and table 1-2 as engagement member (web), double component and engaged Component (flange), manufactured Fig. 4 (a), (b), (c) and Fig. 5 (a), (b), shape shown in (c) practical structures size large size Welding structure connector.Fig. 4 (a), (b), (c) have assumed that the case where brittle crack is from by engagement member (flange) generation/propagation Figure, Fig. 5 (a), (b), (c) have assumed that brittle crack from figure the case where engagement member (web) generation/propagation.It needs It is bright, in the corner joint of manufacture, in the ratio for doubling component 10 with being made non-welded portion on the interface of engagement member 2 Y (=(the wide Wd of plate that the width B/ of non-welded portion doubles component)) changes and there are such non-welded portions 4 shown in Fig. 1 (a). It should be noted that without residual non-welded portion on engagement member (web) and the interface for doubling component.
It should be noted that the case where Fig. 4 be set as by engagement member (flange) thick steel plate (only base material) (Fig. 4 (a)) or Thick steel plate (Fig. 4 (b)) with butt joint, engagement member (web) be set as thick steel plate (only base material) (Fig. 4 (a), (b)) or Thick steel plate (Fig. 4 (c)) with butt joint.It is (only female that the engagement member (web) of the case where Fig. 5 is similarly set as thick steel plate Material) (Fig. 5 (a)) or the thick steel plate (Fig. 5 (b)) with butt joint, thick steel plate (only base material) is set as by engagement member (flange) (Fig. 5 (a), (b)) or thick steel plate (Fig. 5 (c)) with butt joint.It should be noted that butt joint is big by 1 welding bead Input heat electrogas arc welding (1 electrode EGW, 2 electrode EGW, SEGARC, 2 electrode SEGARC) or multi-layer C O2Welding is to manufacture.
It should be noted that corner joint changes the welding conditions such as welding material and welding heat input, protective gas And it is formed to have the corner joint of the fillet weld metal of various toughness, various fillet welding feet length or deposition width.Fillet welding foot is long, molten Deposited width is all the average value of two sides.It should be noted that the toughness about fillet weld metal, from fillet weld metal or by with Charpy impact test piece (10mm is thick) is chosen in the butt joint of the identical condition manufacture of fillet welding, in accordance with the regulation of JIS Z2242 And fracture critical transformation temperature vTrs (DEG C) is found out.
In addition, Fig. 4 and ultra-large type structural model test body shown in fig. 5 are manufactured using obtained large-scale corner joint, it is real It has applied brittle-cracking propagation and has stopped test.It should be noted that the ultra-large type structural model test body of Fig. 4 is incidentally doubling part The lower section by engagement member (flange) 2 of large-scale corner joint 9, will be by engagement member (flange) 2 and phase by temporary weld 8 Steel plate with plate thickness is welded.Moreover, the ultra-large type structural model test body of Fig. 5 connects in the large-scale corner connection for incidentally doubling part The lower section of first 9 engagement member (web) 1 is carried out engagement member (web) 1 with the steel plate of identical plate thickness by temporary weld 8 Welding.
Then, the front end of mechanical recess 7 is processed into engagement member (web) 1 or by the mother of engagement member (flange) 2 Material, the fusion portion (BOND) in butt joint portion 12,22 or welding metal WM.
In addition, brittle-cracking propagation stops in test, strike is applied to mechanical recess and generates brittle crack, has investigated biography Whether the brittle crack broadcast stops in fillet weld portion.
All tests are all in 100~283N/mm of proof stress2, implement under conditions of -10 DEG C of temperature.Proof stress 100N/mm 2It is the average value of the stress steadily acted on hull, proof stress 257N/mm2It is bending suitable for hull Take intensity 390N/mm2The comparable value of maximum allowable stress of grade steel plate, proof stress 283N/mm2It is the surrender suitable for hull Intensity 460N/mm2The comparable value of maximum allowable stress of grade steel plate.- 10 DEG C of temperature be ship design temperature.
Obtained result is as shown in table 2-1 and table 2-2.
[table 1-1]
[table 1-2]
[table 2-1]
[table 2-2]
As shown in table 2-1 and table 2-2, in example of the present invention, pass brittle crack from by engagement member (flange) In the case where broadcasting, still make brittle crack from engagement member (flange) propagate in the case where, crackle all rushes in the angle in fillet weld portion Weld metal and stop.
On the other hand, in the comparative example departed from the scope of the present invention, make brittle crack from by engagement member (flange) In the case where propagation, perhaps make brittle crack from engagement member (flange) propagate in the case where or the two in the case where, it is crisp Property crackle do not stop in fillet weld portion and propagate, can not using fillet weld metal prevent brittle crack propagation.
Label declaration
1 engagement member (web)
2 by engagement member (flange)
3 feet are long
4 non-welded portions
5 fillet weld metals
7 mechanical recesses
8 temporary welds
9 incidentally double the large-scale corner joint of component
10 double component
12 web butt joint portions
13 deposition widths
16 non-welded width (B)
22 flange butt joint portions
The θ angle of the crossing.

Claims (3)

1. a kind of welding structural body, wherein
The brittle-cracking propagation stopping characteristics of the welding structural body are excellent, and the welding structural body is have corner joint attached Band doubles the fillet welding structural body of component, and the corner joint doubles the table of component by the way that the end face butt welding of engagement member to be engaged in Face and component welded corner joint being formed by the surface of engagement member together in plate thickness 50mm or more is doubled by described,
The surface that component is doubled described in the corner joint is had on the faying surface on the surface of engagement member with described It is 95% or more the non-welded portion for doubling the wide Wd of plate of component in the section of the corner joint, it is in turn, described to double structure The ratio between the plate thickness td and the wide Wd of plate of part td/Wd meets following (1a) formulas, and in turn, the fillet weld metal of the corner joint is set Correspond to angle for following fillet weld metal: the charpy impact test fracture transition critical-temperature vTrs (DEG C) of the fillet weld metal Leg is long or deposition width L and with it is full in the relationship long or deposition width L by the plate thickness tf of engagement member and fillet welding foot Foot states (1b) formula or following (1c) formulas,
td/Wd<2‥‥(1a)
In the case where L >=20mm, vTrs≤- 5L+65-1.5 (tf-75) ‥ ‥ (1b)
In the case where L < 20mm, vTrs≤- 35-1.5 (tf-75) ‥ ‥ (1c)
Here, vTrs: the charpy impact test fracture transition critical-temperature (DEG C) of fillet weld metal,
Tf: by the plate thickness (mm) of engagement member,
Td: doubling the plate thickness (mm) of component,
Wd: the plate for doubling component is wide (mm),
L: fillet welding foot length or deposition width (mm).
2. welding structural body according to claim 1, wherein
It is described that butt joint portion is had in the direction intersected with the engagement member by engagement member.
3. welding structural body according to claim 2, wherein
The engagement member has butt joint portion, so that the butt joint portion of the engagement member and pair by engagement member The engagement member is arranged in the mode that welded header intersects.
CN201780036808.7A 2016-06-16 2017-06-15 Welded structure having excellent brittle crack propagation stopping characteristics Active CN109311126B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2016-119468 2016-06-16
JP2016119468 2016-06-16
PCT/JP2017/022212 WO2017217515A1 (en) 2016-06-16 2017-06-15 Welded structure having excellent brittle crack arrest characteristics

Publications (2)

Publication Number Publication Date
CN109311126A true CN109311126A (en) 2019-02-05
CN109311126B CN109311126B (en) 2021-03-26

Family

ID=60663228

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201780036808.7A Active CN109311126B (en) 2016-06-16 2017-06-15 Welded structure having excellent brittle crack propagation stopping characteristics

Country Status (5)

Country Link
JP (1) JP6251463B1 (en)
KR (1) KR102090914B1 (en)
CN (1) CN109311126B (en)
PH (1) PH12018550204A1 (en)
WO (1) WO2017217515A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI808791B (en) * 2021-06-15 2023-07-11 日商杰富意鋼鐵股份有限公司 welded structure

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57116392U (en) * 1981-01-06 1982-07-19
CN101096974A (en) * 2006-06-23 2008-01-02 Ihi海洋联合株式会社 Welding structural body
CN101443150A (en) * 2006-05-12 2009-05-27 杰富意钢铁株式会社 Welded structure excellent in brittle-cracking propagation stopping characteristics
CN103796786A (en) * 2011-09-13 2014-05-14 杰富意钢铁株式会社 Welded structure
CN103874557A (en) * 2011-09-13 2014-06-18 杰富意钢铁株式会社 Welded structure
CN104271301A (en) * 2012-05-10 2015-01-07 杰富意钢铁株式会社 Welded structure

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2402258C3 (en) 1973-04-14 1980-01-03 Chemische Fabrik Pfersee Gmbh, 8900 Augsburg Use of condensation products to handle textile materials
JP4074524B2 (en) 2003-01-31 2008-04-09 新日本製鐵株式会社 Welded structure with excellent brittle fracture resistance
KR101187972B1 (en) * 2010-07-22 2012-10-04 주식회사 포스코 Weld Structure and Method for Manufacturing The Same
WO2016143354A1 (en) * 2015-03-12 2016-09-15 Ｊｆｅスチール株式会社 Welded structure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57116392U (en) * 1981-01-06 1982-07-19
CN101443150A (en) * 2006-05-12 2009-05-27 杰富意钢铁株式会社 Welded structure excellent in brittle-cracking propagation stopping characteristics
CN101096974A (en) * 2006-06-23 2008-01-02 Ihi海洋联合株式会社 Welding structural body
CN103796786A (en) * 2011-09-13 2014-05-14 杰富意钢铁株式会社 Welded structure
CN103874557A (en) * 2011-09-13 2014-06-18 杰富意钢铁株式会社 Welded structure
CN104271301A (en) * 2012-05-10 2015-01-07 杰富意钢铁株式会社 Welded structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI808791B (en) * 2021-06-15 2023-07-11 日商杰富意鋼鐵股份有限公司 welded structure

Also Published As

Publication number Publication date
KR102090914B1 (en) 2020-03-18
CN109311126B (en) 2021-03-26
JPWO2017217515A1 (en) 2018-06-28
WO2017217515A1 (en) 2017-12-21
JP6251463B1 (en) 2017-12-20
PH12018550204A1 (en) 2019-10-21
KR20190014068A (en) 2019-02-11

Similar Documents

Publication Publication Date Title
EP2018929B1 (en) Welded structure excellent in brittle-cracking propagation stopping characteristics
CN107405713B (en) Welded structure
CN103874557B (en) Welded structure
KR101504242B1 (en) Welded structure
CN103796786B (en) Welded structure
JP6615215B2 (en) Welded structure with excellent brittle crack propagation stop properties
JP2005319516A (en) Method for welding welded structure having excellent brittle crack propagation resistance and welded structure
CN109311126A (en) The excellent welding structural body of brittle-cracking propagation stopping characteristics
JP2018158345A (en) Welded structure
WO2012008055A1 (en) Welded joint and welded structure having excellent brittle crack propagation resistance
JP5679336B2 (en) Welded structure with excellent brittle crack propagation stop properties
JP2022083554A (en) Method of evaluating brittle crack arrestability of weld structure

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant