CN107984062A - A kind of welding method of SUS316 austenitic stainless steels and Weldox700E low-alloy quenched and tempered steel different steel welds - Google Patents
A kind of welding method of SUS316 austenitic stainless steels and Weldox700E low-alloy quenched and tempered steel different steel welds Download PDFInfo
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- CN107984062A CN107984062A CN201711212911.0A CN201711212911A CN107984062A CN 107984062 A CN107984062 A CN 107984062A CN 201711212911 A CN201711212911 A CN 201711212911A CN 107984062 A CN107984062 A CN 107984062A
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- slope surface
- weldox700e
- welding
- austenitic stainless
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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
- B23K9/00—Arc welding or cutting
- B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded
- B23K9/232—Arc welding or cutting taking account of the properties of the materials to be welded of different metals
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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
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/24—Features related to electrodes
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- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses the welding method of a kind of SUS316 austenitic stainless steels and Weldox700E low-alloy quenched and tempered steel different steel welds, its step are as follows：Step 1 is finished edge, and a side planing of Weldox700E mother metals is machined with the first slope surface, and a side planing of SUS316L mother metals is machined with the second slope surface；Step 2 is transition weldering, at the first slope surface, with one layer of transition zone of welding rod built-up welding, the one side of transition zone is machined out, digs the 3rd slope surface, the 3rd slope surface is parallel with the first slope surface；Step 3 is filling weldering：Groove is formed between 3rd slope surface of transition zone and the second slope surface of SUS316L mother metals, cover welding is filled to groove, the present invention solves Weldox700E low-alloy high-strengths quenched and tempered steel and welding problem during SUS316L austenitic stainless steel different steel welds, ensure that weld seam internal soundness and macro-mechanical property reach performance.
Description
Technical field
The present invention relates to a kind of welding method, and in particular to a kind of conjunction low with Weldox700E of SUS316 austenitic stainless steels
The welding method of golden quenched and tempered steel different steel weld.
Background technology
316L austenitic stainless steels and Weldox700E low-alloy quenched and tempered steel are not specifically applied in existing industry also
Welding procedure.Existing process cannot meet 316L austenitic stainless steels and the welding production of Weldox700E.Welding profession at present
The welding material special of SUS316L austenitic stainless steels and Weldox700E different steel welds is not directly applied to inside.SUS316L
Welding with Weldox700E belongs to different steel weld, is also easy to produce in welding process under fire check, cold crack and connector plasticity and toughness
The problem of drop, Weldox700E carbon equivalent values are higher, and crackle is also easy to produce in welding process.When SUS316L is welded, weld seam is easily formed
Thick column crystal, and because thermal conductivity factor is small, linear expansion coefficient is big, and easily form fire check.
The content of the invention
To solve the above-mentioned problems, the present invention provides a kind of SUS316 austenitic stainless steels and Weldox700E low-alloy
The welding method of quenched and tempered steel different steel weld.
The technical scheme is that：A kind of SUS316 austenitic stainless steels and Weldox700E low-alloy quenched and tempered steel are different
The welding method of kind steel welding, its step are as follows：
Step 1：Finished edge：One side planing of Weldox700E mother metals is machined with the first slope surface, and the one of SUS316L mother metals
Side planing is machined with the second slope surface；
Step 2：Transition is welded：Before graded seal, first Weldox700E mother metals are integrally preheated, at the first slope surface,
With one layer of transition zone of welding rod built-up welding, when built-up welding, uses DC reverse connection electric power polarity, and transition postheating is right after being cooled to room temperature
The one side of transition zone is machined out, and digs the 3rd slope surface, and the 3rd slope surface is parallel with the first slope surface；
Step 3：Filling weldering：Groove is formed between 3rd slope surface of transition zone and the second slope surface of SUS316L mother metals, it is right
Groove is filled cover welding, when filling cover welding, is welded using alternating electrical polarity, fills postwelding pair
Second slope surface of heat and slow cooling after the first slope surface side of Weldox700E mother metals carries out, weld seam and SUS316L mother metals is in air
In cooled down.
Further, the angle of the first slope surface in the step 1 is 25 °~30 °.
Further, the angle of the second slope surface in the step 1 is 20 °~25 °.
Further, in the step 2, to 75-100 DEG C of the preheating temperature of Weldox700E mother metals entirety.
Further, the thickness of the transition zone in the step 2 is 5mm.
Further, the welding rod that transition is welded in the step 2 is using E309MoL-17 rutile-types, acid covered electrode.
Further, during the transition weldering of the step 2, electric current 110-120A.
Further, in the step 3, the postheat temperature to the first slope surface side of Weldox700E mother metals is 200 DEG C.
Further, the wlding material that weldering is filled in the step 3 uses A022 welding rods.
Beneficial effects of the present invention are：SUS316L belongs to austenitic stainless steel, under its condition of high temperature linear expansion coefficient compared with
Weldox700E high, when welding, deform larger, therefore the slope surface angle of SUS316L sides is smaller when formulating groove, to reduce
The welding deformation of SUS316L sides.The texture of the Weld pipe mill of the present invention is austenite, is dispersed with the interdendritic of austenite
Half netted and netted delta ferrite, while a small amount of MC type carbide is also dispersed with, crystal grain is thinner, belongs to AF solidification models, tool
There is low fire check sensitiveness.The present invention solves Weldox700E low-alloy high-strengths quenched and tempered steel and SUS316L austenites not
Welding problem during rust steel different steel weld, ensure that weld seam internal soundness and macro-mechanical property reach performance.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the structure diagram of the present invention.
Fig. 2 is the grain structure figure of weld seam.
Fig. 3 is the grain structure figure of the first slope surfaces of Weldox700E side.(the non-wetted areas in diagram left side is weld seam, right side
For Weldox700E heat affected areas)
Fig. 4 is the grain structure figure of the second slope surfaces of SUS316L side.(diagram left side is welded seam area, right side SUS316L
Heat affected area)
Embodiment
The embodiment of the present invention is described further below in conjunction with the accompanying drawings, the present embodiment is not formed to the present invention
Limitation.
A kind of welding method of SUS316 austenitic stainless steels and Weldox700E low-alloy quenched and tempered steel different steel welds, its
Step the following is：
Step 1：Finished edge：One side planing of Weldox700E mother metals 1 is machined with the first slope surface 101, the first slope surface 101
Angle be 25 °~30 °, a side planing of SUS316L mother metals 2 is machined with the second slope surface 201, and the angle of the second slope surface 201 is 20 °
~25 °.
Step 2：Transition is welded：It is first overall to Weldox700E mother metals 1 to preheat before graded seal, preheating temperature 75-
100℃.At the first slope surface 101, with one layer of transition zone 3 of welding rod built-up welding, the thickness of transition zone 3 is 5mm, and welding rod uses
E309MoL-17 rutile-types, acid covered electrode, a diameter of 3.2mm of welding rod, contains higher nickel content in welding rod,
Less than 350 DEG C have good corrosion resistance, have preferable plasticity and toughness and cold-crack resistance energy.DC reverse connection is used during built-up welding
Electric power polarity, welding current use 110-120A, to ensure enough deposition depth, while can improve production efficiency.Transition
Postwelding wraps up in deposited slow cooling with heat-preservation cotton, and after being cooled to room temperature, the one side of transition zone 3 is machined out, digs the 3rd slope surface
301.3rd slope surface 301 is parallel with the first slope surface 101.
Step 3：Filling weldering：Shape between 3rd slope surface 301 of transition zone 3 and the second slope surface 201 of SUS316L mother metals 2
Into groove 4, cover welding is filled to groove 4, wlding material uses A022 welding rods, a diameter of 3.2mm of A022 welding rods,
A022 welding rods have the characteristics that easily to take off slag, the small, tenacity excellent of splashing and compared with high cracking resistance energy.When filling cover welding, use
Alternating electrical polarity is welded, and reduces heat input, it is possible to reduce the welding deformation at the second slope surface 201 of SUS316L mother metals 2,
Avoid welding point long in the high-temperature area residence time and produce fire check.Postwelding is filled to the of Weldox700E mother metals 1
Heat after being carried out at one slope surface 101, postheat temperature be 200 DEG C, and wrap up in deposited slow cooling with heat-preservation cotton, weld seam and SUS316L mother metals 2
Cooled down in atmosphere at second slope surface 201.
More rational microstructure is formed after welding, after welding, the texture of Weld pipe mill is austenite, such as Fig. 2 institutes
Show, half netted and netted delta ferrite be dispersed with the interdendritic of austenite, while be also dispersed with a small amount of MC type carbide,
Crystal grain is thinner, belongs to AF solidification models, has low fire check sensitiveness.As shown in figure 3, the first of Weldox700E mother metals 1
The texture of the side of slope surface 101 is tempered sorbite, and tissue is normal；As shown in figure 4, the second slope surface of SUS316L mother metals 2
The texture of 201 side is austenite, wherein being dispersed with the delta ferrite of a small amount of fine strip shape, organizes no abnormality seen.
The mechanical property of welding point is as shown in table 1
Table 1
Weldox700E has no decline with SUS316L weld seams both sides heat affected area impact property as can be known from the table data, welds
It is relatively low to stitch centric(al) impact value, but meets the requirement of design >=27J, the welding point comprehensive performance qualification formed is up to standard.
The above described is only a preferred embodiment of the present invention, being not used in the limitation present invention, those skilled in the art can
It is this to change or equally replace in the essence and protection domain of the present invention, to make various modifications or equivalent substitution to the present invention
Change and also should be regarded as in the protection domain of technical solution of the present invention.
Claims (8)
1. the welding method of a kind of SUS316 austenitic stainless steels and Weldox700E low-alloy quenched and tempered steel different steel welds, it is special
Sign is：Its step is as follows：
Step 1：Finished edge：One side planing of Weldox700E mother metals is machined with the first slope surface, a side planing of SUS316L mother metals
It is machined with the second slope surface；
Step 2：Transition is welded：Before graded seal, first Weldox700E mother metals are integrally preheated, at the first slope surface, with weldering
One layer of transition zone of bar built-up welding, when built-up welding, use DC reverse connection electric power polarity, transition postheating, after being cooled to room temperature, to transition
The one side of layer is machined out, and digs the 3rd slope surface, the 3rd slope surface is parallel with the first slope surface；
Step 3：Filling weldering：Groove is formed between 3rd slope surface of transition zone and the second slope surface of SUS316L mother metals, to groove
Cover welding is filled, when filling cover welding, is welded using alternating electrical polarity, filling postwelding is to Weldox700E
Cooled down in atmosphere at second slope surface of heat and slow cooling after the first slope surface side of mother metal carries out, weld seam and SUS316L mother metals.
2. SUS316 austenitic stainless steels according to claim 1 and Weldox700E low-alloy quenched and tempered steel different steel welds
Welding method, it is characterised in that：The angle of the first slope surface in the step 1 is 25 ° ~ 30 °.
3. SUS316 austenitic stainless steels according to claim 1 and Weldox700E low-alloy quenched and tempered steel different steel welds
Welding method, it is characterised in that：The angle of the second slope surface in the step 1 is 20 ° ~ 25 °.
4. SUS316 austenitic stainless steels according to claim 1 and Weldox700E low-alloy quenched and tempered steel different steel welds
Welding method, it is characterised in that：In the step 2, to 75-100 DEG C of the preheating temperature of Weldox700E mother metals entirety.
5. SUS316 austenitic stainless steels according to claim 1 and Weldox700E low-alloy quenched and tempered steel different steel welds
Welding method, it is characterised in that：The thickness of transition zone in the step 2 is 5mm.
6. SUS316 austenitic stainless steels according to claim 1 and Weldox700E low-alloy quenched and tempered steel different steel welds
Welding method, it is characterised in that：The welding rod that transition is welded in the step 2 is using E309MoL-17 rutile-types, acid coating
Welding rod.
7. SUS316 austenitic stainless steels according to claim 1 and Weldox700E low-alloy quenched and tempered steel different steel welds
Welding method, it is characterised in that：During the transition weldering of the step 2, electric current 110-120A.
8. SUS316 austenitic stainless steels according to claim 1 and Weldox700E low-alloy quenched and tempered steel different steel welds
Welding method, it is characterised in that：In the step 3, the postheat temperature to the first slope surface side of Weldox700E mother metals is
200℃。
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| CN201711212911.0A CN107984062A (en) | 2017-11-27 | 2017-11-27 | A kind of welding method of SUS316 austenitic stainless steels and Weldox700E low-alloy quenched and tempered steel different steel welds |
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| CN201711212911.0A CN107984062A (en) | 2017-11-27 | 2017-11-27 | A kind of welding method of SUS316 austenitic stainless steels and Weldox700E low-alloy quenched and tempered steel different steel welds |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111299890A (en) * | 2020-03-20 | 2020-06-19 | 上海宝冶集团有限公司 | Narrow-position dissimilar steel welding method |
| CN111570979A (en) * | 2020-05-22 | 2020-08-25 | 中国石油天然气集团有限公司 | Connecting method of dissimilar metal welding test plates |
| CN113351966A (en) * | 2021-06-30 | 2021-09-07 | 沈阳汇博热能设备有限公司 | Dissimilar steel welding method for low alloy steel and austenitic stainless steel |
| CN114260574A (en) * | 2021-12-17 | 2022-04-01 | 江苏大学 | Underwater wet welding method suitable for dissimilar steel of low alloy steel/stainless steel |
| CN114985880A (en) * | 2022-06-14 | 2022-09-02 | 沈阳鼓风机集团核电泵业有限公司 | Method for welding austenitic stainless steel part and carbon steel part |
| CN115401407A (en) * | 2022-08-01 | 2022-11-29 | 宜昌江峡船用机械有限责任公司 | Welding method capable of simultaneously ensuring strength and hardness of 40CrNiMoA welding line |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111299890A (en) * | 2020-03-20 | 2020-06-19 | 上海宝冶集团有限公司 | Narrow-position dissimilar steel welding method |
| CN111570979A (en) * | 2020-05-22 | 2020-08-25 | 中国石油天然气集团有限公司 | Connecting method of dissimilar metal welding test plates |
| CN113351966A (en) * | 2021-06-30 | 2021-09-07 | 沈阳汇博热能设备有限公司 | Dissimilar steel welding method for low alloy steel and austenitic stainless steel |
| CN114260574A (en) * | 2021-12-17 | 2022-04-01 | 江苏大学 | Underwater wet welding method suitable for dissimilar steel of low alloy steel/stainless steel |
| CN114985880A (en) * | 2022-06-14 | 2022-09-02 | 沈阳鼓风机集团核电泵业有限公司 | Method for welding austenitic stainless steel part and carbon steel part |
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| CN115401407A (en) * | 2022-08-01 | 2022-11-29 | 宜昌江峡船用机械有限责任公司 | Welding method capable of simultaneously ensuring strength and hardness of 40CrNiMoA welding line |
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Address after: 226001 No. 135 Zhong Xiu Zhong Lu, Jiangsu, Nantong Applicant after: Jintongling Technology Group Co., Ltd. Address before: 226001 No. 135 Zhong Xiu Zhong Lu, Jiangsu, Nantong Applicant before: Jiangsu Jintongling Fluid Machinery Technology Co., Ltd. |
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