CN106964912A - A kind of welding method of low-temperature cast steel part and marine board - Google Patents
A kind of welding method of low-temperature cast steel part and marine board Download PDFInfo
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- CN106964912A CN106964912A CN201710296938.6A CN201710296938A CN106964912A CN 106964912 A CN106964912 A CN 106964912A CN 201710296938 A CN201710296938 A CN 201710296938A CN 106964912 A CN106964912 A CN 106964912A
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- low
- temperature
- cast steel
- steel part
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Classifications
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- 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
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The present invention discloses the welding method of a kind of low-temperature cast steel part and marine board, comprises the following steps：S10 gets the raw materials ready there is provided low-temperature cast steel part and marine board, to being heat-treated after the first bevel of low-temperature cast steel part, marine board square groove；S20 weld preheatings, 100 DEG C are preheated to by welded blank；S30 is welded, arranging multiplayer welding bead, and every layer is terminated since marine board by low-temperature cast steel part, until whole weld seam is completed.By carrying out bevel processing to low-temperature cast steel part before heat treatment, the stress at groove can be eliminated by heat treatment, welding quality is improved；By being preheated before welding to low-temperature cast steel part and marine board, in welding, the combination of insulation and special welding bead arrangement make it that the weld defect after welding is few, effectively raise the low temperature impact properties of Seam and heat effected zone, welding quality is ensure that, the weld seam after welding can bear 60 DEG C of low-temperature impact test.
Description
Technical field
The present invention relates to the welding method of welding technology field, more particularly to a kind of low-temperature cast steel part and marine board.
Background technology
The welding procedure of existing low-temperature cast steel part and marine board can only meet -40 DEG C of low-temperature impact test so that existing
The low-temperature cast steel part and marine board of some welding procedure welding can not be applied on the ship of the environment less than -40 DEG C, to polar region
The manufacture of ship adds the difficulty for being difficult to overcome.
The content of the invention
It is an object of the invention to：The welding method of a kind of low-temperature cast steel part and marine board is provided, the sheet material after its welding
- 60 DEG C of low-temperature impact test can be born, the low temperature impact properties of weld seam are added, the polar ship of lower temperature environment can be met
Oceangoing ship is manufactured.
For up to above-mentioned purpose, the present invention uses following technical scheme：
The welding method of a kind of low-temperature cast steel part and marine board is provided, comprised the following steps：
Step S10, get the raw materials ready there is provided low-temperature cast steel part and marine board, to carrying out heat after the first bevel of the low-temperature cast steel part
Processing, the marine board square groove；
Step S20, weld preheating, 100 DEG C are preheated to by the low-temperature cast steel part and the marine board；
Step S30, welding, welding bead arranging multiplayer during welding, every layer is soldered to the low temperature since the marine board
Steel-casting terminates, until whole welding process is completed, control interlayer temperature is between 100~230 DEG C in welding process.
Beneficial effects of the present invention are：By carrying out bevel processing to low-temperature cast steel part before heat treatment, at heat
Reason can eliminate the stress at groove and improve the quality of groove, improve welding quality；By before welding to low-temperature cast steel part and
Marine board is preheated, the combination of insulation and special welding bead arrangement causes the weld defect after welding in welding
It is few, effectively raise the low temperature impact properties of Seam and heat effected zone, it is ensured that welding quality, the weld seam after welding can be held
By -60 DEG C of low-temperature impact test, the polar region shipbuilding of lower temperature environment can be met.
Brief description of the drawings
The present invention is described in further detail below according to drawings and examples.
Fig. 1 for the embodiment of the present invention low-temperature cast steel part and marine board welding method welding bead layout drawing.
Choose figure in position when Fig. 2 carries out impact test for the low-temperature cast steel part of the embodiment of the present invention.
In figure：
1st, low-temperature cast steel part；2nd, marine board；3rd, upper surface；4th, lower surface；5th, testing position.
Embodiment
For make present invention solves the technical problem that, the technical scheme that uses and the technique effect that reaches it is clearer, below
The technical scheme of the embodiment of the present invention will be described in further detail with reference to accompanying drawing, it is clear that described embodiment is only
It is a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, those skilled in the art exist
The every other embodiment obtained under the premise of creative work is not made, the scope of protection of the invention is belonged to.
As shown in figure 1, the embodiment of the present invention provides the welding method of a kind of low-temperature cast steel part and marine board, including following step
Suddenly：
Step S10, get the raw materials ready there is provided low-temperature cast steel part 1 and marine board 2, to being carried out after the first bevel of the low-temperature cast steel part 1
Heat treatment, the square groove of marine board 2；
Step S20, weld preheating, 100 DEG C are preheated to by the low-temperature cast steel part 1 and the marine board 2；
Step S30, welding, welding bead arranging multiplayer during welding, every layer is soldered to the low temperature since the marine board 2
Steel-casting 1 terminates, until whole welding process is completed, control interlayer temperature is between 100~230 DEG C in welding process.
By carrying out bevel processing to low-temperature cast steel part 1 before heat treatment, answering at groove can be eliminated by heat treatment
Power, improves welding quality；Insulation and spy by being preheated before welding to low-temperature cast steel part 1 and marine board 2, in welding
The combination of different welding bead arrangement make it that the weld defect after welding is few, effectively raises the low temperature of Seam and heat effected zone
Impact property, it is ensured that welding quality, the weld seam after welding can bear -60 DEG C of low-temperature impact test.
In a preferred embodiment of the invention, the step S30 is specifically included：
Step S31, welding bead arrangement, use multilayer welding bead structure, every layer of welding bead starts directly by the marine board 2 during welding
Terminate to the low-temperature cast steel part 1, in welding process, the interlayer temperature is monitored, if the interlayer temperature does not reach standard
Temperature, then carry out step S32, if the interlayer temperature reaches the normal temperature, continues step S31, until whole weldering
Seam terminates, and the normal temperature is 100~230 DEG C；
Step S32, preheating, carry out being preheated to the normal temperature, so to the low-temperature cast steel part 1 and the marine board 2
Continue step S31 afterwards.
Further, setting steps S33, postweld heat preservation after the step S32, are soldered after last layer of welding bead, use immediately
Mineral wool covers weld seam, makes weld seam slow cooling to room temperature.
In another preferred embodiment of the present invention, the step S10 is specifically included：
Step S11, raw material disposal；
Step S12, groove processing, open up single groove on the low-temperature cast steel part 1, the angle of groove for 40 °~
45 °, root face is 0-2mm；
Step S13, heat treatment.
In another preferred embodiment of the present invention, the step S11 is specially：The low-temperature cast steel part 1 and institute
State marine board 2 and enter first to carry out outward appearance detection and UT detections (ultrasonic examination detection) after factory, then again to the low-temperature cast steel part 1
Carry out low-temperature flexibility impact test.
In the present embodiment, as shown in Fig. 2 the low-temperature flexibility impact test is specially -60 DEG C of low-temperature flexibility impact examinations
Test, upper surface 3, lower surface 4 and the centre position in the thickness face of low-temperature cast steel part 1 are chosen as testing position 5, in the examination
Progress low-temperature flexibility impact test at position 5 is tested, -60 DEG C of punchings of the upper surface 3, lower surface 4 and middle position after experiment
The average value for hitting toughness value is not less than 60J/cm2。
In other embodiments of the invention, the step S11 also includes wlding detection：Vertical position welding experiment is carried out to wlding,
The average value of -60 DEG C of notched bar impact strengths at Weld pipe mill thickness after experiment is not less than 60J/cm2.Vertical position welding experiment refers to, adopts
The low-temperature cast steel part and marine board of same batch are welded with the wlding for not carrying out soldering test, welding manner is vertical docking,
Welding parameter, welding requirements, mother metal requirement etc. are identical with actual welding.In the present embodiment, wlding uses capital thunder wlding, board
Number GFR-81K2, gage of wire 1.2mm.
In one embodiment of this invention, gap during welding between the low-temperature cast steel part 1 and the marine board 2 is 5
~10mm.
The low-temperature cast steel part 1 and the thickness of the marine board 2 are 27.5~110mm.
In another embodiment of the invention, the low-temperature cast steel part 1 uses CO with the marine board 22Gas shielded arc welding,
The welding manner of the low-temperature cast steel part 1 and the marine board 2 can dock, vertical docked or horizontal docking to be flat during welding.
In one particular embodiment of the present invention, as shown in figure 1, the low-temperature cast steel part 1 and the welding side of marine board 2
Method comprises the following steps：
S100, offer low-temperature cast steel part 1, marine board 2 and wlding, outward appearance inspection is carried out to low-temperature cast steel part 1 and marine board 2
Look into and checked with UT；
S200, the low-temperature impact test that -60 DEG C are carried out to low-temperature cast steel part 1, choose the upper end in the thickness face of low-temperature cast steel part 1
Face 3, lower surface 4 and centre position are as testing position 5, as shown in Fig. 2 doing -60 DEG C of low-temperature impact in this testing position 5
After experiment, impact test, the average value of -60 DEG C of notched bar impact strengths at testing position 5 is not less than 60J/cm2, in impact test,
Testing position 5 is arranged on the middle part of the neighbouring upper surface 3 of the thickness direction of low-temperature cast steel part 1, neighbouring lower surface 4 and thickness direction
Position, wherein, the distance between the testing position 5 of neighbouring upper surface 3 and upper surface 3 are 2mm, the experiment position of neighbouring lower surface 4
It is 2mm to put the distance between 5 and lower surface 4, and specific notched bar impact strength requirement see the table below 1：
| Sample position | Test temperature | Average value | Single liminal value |
| Upper surface | -60℃ | 60J/cm2 | 45J/cm2 |
| Interior thickness | -60℃ | 60J/cm2 | 45J/cm2 |
| Lower surface | -60℃ | 60J/cm2 | 45J/cm2 |
S300, single groove opened low-temperature cast steel part, marine board square groove, groove requires control table 2 below：
S400, low-temperature cast steel part 1 are heat-treated；
S500, wlding experiment, -60 DEG C of impacts carried out to wlding at vertical position welding experiment, the Weld pipe mill thickness after experiment are tough
Property value average value be not less than 60J/cm2；
S600, weld preheating, 100 DEG C are preheated to by the low-temperature cast steel part 1 and the marine board 2；
S700, welding, during welding, to control welding quality and improving the low-temperature flexibility of corresponding weld dimensions,
The arranging multiplayer welding bead in weld seam, every layer of welding bead is welded by marine board 2 until low-temperature cast steel part 1 terminates, if every layer of weldering
Road is made up of multiple tracks welding bead, then first of every layer of welding bead first welds marine board 2, the last part of welding low-temperature cast steel together 1, with
Exemplified by vertical position welding road, the welding bead arrangement of whole weld seam is as shown in figure 1, welding parameter when welding in addition is performed according to table 3 below：
During welding, interlayer temperature is controlled between per pass weld seam, interlayer temperature does not reach normal temperature (100~230 DEG C)
When, it is necessary to preheating is until reach normal temperature again, until this weld seam welds completion, per pass throat depth is no more than during welding
3mm, width is no more than 16mm, and such design is to reduce stress concentration during welding in weld seam.
S800, when being soldered last one, weld seam is covered using mineral wool immediately, makes weld seam slow cooling to room temperature.
The present invention has advantages below：
1. the material of low-temperature cast steel part can be determined with established standardses value and limiting value and carrys out label standard, it is ensured that low-temperature impact
The stabilization of performance and reliable；
2. the examination requirements of wlding can be set, specify wlding and carry out label standard, to ensure the welding quality in later stage；
3. by adjusting groove design and matching requirements, the low temperature of the Seam and heat effected zone of low-temperature cast steel part side can be improved
Impact property；
4. the related process requirements such as specific and refinement welding bead arrangement, welding parameter, reduce the generation of weld defect, while this
The welding bead arrangement and welding bead parameter of structure can improve the cold temperature impact of Seam and heat effected zone, it is ensured that welding quality.
- 60 DEG C of low temperature can be born using the low-temperature cast steel part and the weld seam of marine board after the welding method welding of the present invention
Impact, meets the use of polar region ship, reduces the manufacture difficulty of polar region ship, improve the quality of polar region ship.
The technical principle of the present invention is described above in association with specific embodiment.These descriptions are intended merely to explain the present invention's
Principle, and limiting the scope of the invention can not be construed in any way.Based on explanation herein, the technology of this area
Personnel, which would not require any inventive effort, can associate other embodiments of the present invention, and these modes are fallen within
Within protection scope of the present invention.
Claims (10)
1. the welding method of a kind of low-temperature cast steel part and marine board, it is characterised in that comprise the following steps：
Step S10, get the raw materials ready there is provided low-temperature cast steel part and marine board, to being heat-treated after the first bevel of the low-temperature cast steel part,
The marine board square groove；
Step S20, weld preheating, 100 DEG C are preheated to by the low-temperature cast steel part and the marine board；
Step S30, welding, welding bead arranging multiplayer during welding, every layer is soldered to the low-temperature cast steel since the marine board
Part terminates, until whole welding process is completed, control interlayer temperature is between 100~230 DEG C in welding process.
2. the welding method of low-temperature cast steel part according to claim 1 and marine board, it is characterised in that the step S30
Specifically include：
Step S31, welding bead arrangement, use multilayer welding bead structure during welding, every layer of welding bead starts by the marine board until institute
State low-temperature cast steel part to terminate, in welding process, monitor the interlayer temperature, if the interlayer temperature does not reach normal temperature,
Step S32 is so carried out, if the interlayer temperature reaches the normal temperature, continues step S31, until whole weld seam knot
Beam, the normal temperature is 100~230 DEG C；
Step S32, preheating, carry out being preheated to the normal temperature, then proceed to the low-temperature cast steel part and the marine board
Step S31.
3. the welding method of low-temperature cast steel part according to claim 2 and marine board, it is characterised in that the step S32
Setting steps S33, postweld heat preservation, are soldered after last layer of welding bead, cover weld seam with mineral wool immediately afterwards, make weld seam slow cooling to room
Temperature.
4. the welding method of low-temperature cast steel part according to claim 1 and marine board, it is characterised in that the step S10
Specifically include：
Step S11, raw material disposal；
Step S12, groove processing, open up single groove on the low-temperature cast steel part, the angle of groove for 40 °~45 °, root face
For 0-2mm；
Step S13, heat treatment.
5. the welding method of low-temperature cast steel part according to claim 4 and marine board, it is characterised in that the step S11
Specially：The low-temperature cast steel part and the marine board enter first to carry out outward appearance detection and UT detections after factory, then again to described low
Warm steel-casting carries out low-temperature flexibility impact test.
6. the welding method of low-temperature cast steel part according to claim 5 and marine board, it is characterised in that the low-temperature flexibility
Impact test is specially -60 DEG C of low-temperature flexibility impact tests, choose the upper surface in the low-temperature cast steel part thickness face, lower surface and
Centre position carries out low-temperature flexibility impact test, upper surface, lower end after experiment as testing position at the testing position
The average value of -60 DEG C of notched bar impact strengths of face and middle position is not less than 60J/cm2。
7. the welding method of low-temperature cast steel part according to claim 5 and marine board, it is characterised in that the step S11
Also include wlding to detect：Carry out vertical position welding experiment to wlding, -60 DEG C of notched bar impact strengths at Weld pipe mill thickness after experiment it is flat
Average is not less than 60J/cm2。
8. the welding method of the low-temperature cast steel part and marine board according to any one of claim 1 to 7, it is characterised in that weldering
Gap when connecing between the low-temperature cast steel part and the marine board is 5~10mm.
9. the welding method of the low-temperature cast steel part and marine board according to any one of claim 1 to 7, it is characterised in that institute
The thickness for stating low-temperature cast steel part and the marine board is 27.5~110mm.
10. the welding method of the low-temperature cast steel part and marine board according to any one of claim 1 to 7, it is characterised in that institute
State low-temperature cast steel part and use CO with the marine board2Gas shielded arc welding, the low-temperature cast steel part and the marine board during welding
Welding manner can be flat docking, vertical docking or horizontal docking.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710296938.6A CN106964912A (en) | 2017-04-28 | 2017-04-28 | A kind of welding method of low-temperature cast steel part and marine board |
| PCT/CN2017/100616 WO2018196250A1 (en) | 2017-04-28 | 2017-09-05 | Method for welding low-temperature cast steel member and ship plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710296938.6A CN106964912A (en) | 2017-04-28 | 2017-04-28 | A kind of welding method of low-temperature cast steel part and marine board |
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| Publication Number | Publication Date |
|---|---|
| CN106964912A true CN106964912A (en) | 2017-07-21 |
Family
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|---|---|---|---|
| CN201710296938.6A Pending CN106964912A (en) | 2017-04-28 | 2017-04-28 | A kind of welding method of low-temperature cast steel part and marine board |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106964912A (en) |
| WO (1) | WO2018196250A1 (en) |
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| Publication number | Publication date |
|---|---|
| WO2018196250A1 (en) | 2018-11-01 |
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Application publication date: 20170721 |