CN110695489A - Composite steel plate welding method - Google Patents

Composite steel plate welding method Download PDF

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Publication number
CN110695489A
CN110695489A CN201911005753.0A CN201911005753A CN110695489A CN 110695489 A CN110695489 A CN 110695489A CN 201911005753 A CN201911005753 A CN 201911005753A CN 110695489 A CN110695489 A CN 110695489A
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CN
China
Prior art keywords
welding
composite
layer
seam
base
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.)
Withdrawn
Application number
CN201911005753.0A
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Chinese (zh)
Inventor
陈微
徐绍勇
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Hubei Institute Of Technology
Hubei Polytechnic University
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Hubei Institute Of Technology
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Priority to CN201911005753.0A priority Critical patent/CN110695489A/en
Publication of CN110695489A publication Critical patent/CN110695489A/en
Withdrawn legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/02Seam welding; Backing means; Inserts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K33/00Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
    • B23K33/004Filling of continuous seams
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/18Submerged-arc welding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/235Preliminary treatment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00Materials to be soldered, welded or cut
    • B23K2103/02Iron or ferrous alloys
    • B23K2103/04Steel or steel alloys
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00Materials to be soldered, welded or cut
    • B23K2103/02Iron or ferrous alloys
    • B23K2103/04Steel or steel alloys
    • B23K2103/05Stainless steel

Abstract

The invention relates to a method for welding composite steel plates, which is used in the field of welding stainless steel composite plates, wherein the composite plates are explosive welding composite plates, the base material of the composite plates is Q345R, and the composite material is 316L heat-resistant stainless steel, and the method comprises the following steps: groove machining; cleaning a groove and combining plates; welding the base layer on the double-layer side; welding the transition layer; welding the multiple layers; the back surface base layer is welded, and the stainless steel composite plate welded by the process avoids the occurrence of fragile tissues in the welding process of the composite plate, prevents welding cracks, improves the welding quality of the composite plate and improves the welding efficiency of the composite plate.

Description

Composite steel plate welding method
Technical Field
The invention relates to a welding method of a composite steel plate, which is mainly applied to the fields of welding of stainless steel composite plates and the like to ensure the quality and the welding efficiency of welding seams of the composite plates.
Background
A stainless steel composite plate, especially a heat-resistant stainless steel composite plate, is compounded by adopting heat-resistant stainless steel and common carbon steel Q345R and the like through explosion welding, is used for manufacturing a pressure container used in a high-temperature state, can exert the oxidation resistance and corrosion resistance of the heat-resistant stainless steel at a high temperature, can also exert the strength and toughness of the common carbon steel, and can reduce the material cost compared with the pressure container manufactured by using pure thickened heat-resistant steel, but the quality of the welding seam of the composite plate is a key factor for ensuring the safety of the pressure container, and how to improve the quality and welding efficiency of the welding seam of the composite plate is a more complex system engineering.
The composite plate welding belongs to dissimilar material welding, wherein the dissimilar material welding adopts layered welding, but transition layer welding is needed between a composite layer and a base material layer, the transition layer welding easily causes dilution and condensation of metal material elements of a welding line, the welding line tissue easily generates brittle tissues such as martensite and the like, cracks are generated in the welding process or the subsequent high-temperature high-pressure use process, and the welding line fails, so in order to ensure the welding line quality, most of the welding methods adopted at present are manual welding, high-level skilled welding technical workers are needed for welding, the requirement on the technical workers is high, the pure manual welding efficiency is low, the number of high-technology welders is small, the factors limit the welding efficiency of the heat-resistant steel composite plate, and the quality of the welding line is guaranteed.
Disclosure of Invention
Aiming at the defects of the composite plate welding process, the invention develops the composite plate welding method which is beneficial to ensuring the quality of the welding seam and greatly improving the welding efficiency.
According to the aim, in order to improve the welding efficiency, the welding method adopts a method combining manual welding and automatic welding to weld the base materials with thicker thickness, except for manual welding for bottoming, the other base materials are welded by adopting a submerged automatic arc welding process with higher welding speed and easily guaranteed welding seam quality, the transition layer and the multi-layer welding seams with higher requirements on the welding seam quality are welded by adopting manual welding, and specific transition layer welding materials and welding process parameters are adopted to reduce the diffusion of the components of the base materials and fully isolate the base materials and the multi-layer welding seams, so that the formation of harmful tissues such as martensite is prevented.
A specific technical scheme for realizing the invention is as follows:
a method for welding clad steel plates comprises the following steps: (a) groove machining: processing the composite board into a symmetrical X-shaped groove by a plasma cutting machine, wherein the groove angle is 60 +/-1 degrees; (b) groove cleaning and plate combination: after the groove is machined, polishing the groove to be bright by using a grinding wheel machine, removing surface impurities and a surface heat influence layer, assembling different composite boards, and fixing by spot welding; (c) welding the base layer on the double-layer side: manual electric arc welding is adopted for the composite side backing weld seam (3), after backing is completed, the surface of the weld seam is polished to be bright and flat by a grinder, then the backing weld seam (4) is filled with the composite side base material by adopting submerged automatic arc welding, and the filling height is 1.5-2 mm lower than the bottom of the composite layer; (d) welding a transition layer: manually welding a transition layer welding seam (5) by adopting a transition layer welding rod, wherein the height of the welding seam is 1-2 mm higher than the bottom of the compound layer; (e) multilayer welding: the composite layer is welded by manual welding, and the height of a composite layer welding seam (6) is 1-2 mm higher than the top of the composite layer; (f) welding a back base layer: the composite board is turned over, the bottom of a welding seam is polished by a grinding wheel to be bright and flat, then a welding seam (7) of the backing material of the composite material is filled by adopting heavy-current submerged arc automatic welding, and the height of the welding seam is 1-2 mm higher than the top of the backing material.
The thickness of the multiple layers in the stainless steel composite plate is 0.5-5.0 mm, the thickness of the multiple layers is 316L, the thickness of the base layer is 4.0-22.0 mm, and the material of the base layer is Q345R.
Wherein the groove gap is 0-3 mm, and the size of the truncated edge is 3-4 mm.
And (3) backing up a welding seam of the base material on the composite material side, manually welding by adopting a J507 welding rod, baking for 2 hours at 350 ℃ before welding, and carrying out welding at the current of 250-400A, the welding voltage of 28-32V, the welding speed of 300-450 mm/Min and the dry elongation of 15-25 mm.
The welding seam (4) is filled in the base material on the composite material side, submerged automatic arc welding is adopted, H08A welding wires are adopted as welding materials, welding current is 350A-500A, welding voltage is 28-32V, welding speed is 400-600 mm/Min, dry elongation is 20-30 mm, and spreading height of a welding agent is 20-30 mm.
And (3) welding the transition layer on the composite material side by adopting manual welding with a CHS102 welding rod, baking for 2 hours at 300 ℃ before welding, wherein the welding current is 400-500A, the welding voltage is 28-32V, the welding speed is 300-400 mm/Min, and the dry elongation is 15-25 mm during welding.
And (3) multi-layer welding, wherein an A022 welding rod is adopted for manual welding, baking is carried out for 2 hours at 300 ℃ before welding, the welding current is 400A-500A, the welding voltage is 28-32V, the welding speed is 300-400 mm/Min, and the dry elongation is 20-30 mm during welding.
Welding a back substrate by adopting submerged automatic arc welding, wherein a welding material is H08A welding wire, the welding current is 350-500A, the welding voltage is 28-32V, the welding speed is 400-600 mm/Min, the dry elongation is 20-30 mm, and the spreading height of a welding agent is 20-30 mm.
Compared with the existing welding method of the heat-resistant steel composite plate, the invention has the following effects:
1. the base material with larger thickness is welded by automatic submerged arc welding, so that the welding efficiency is high;
2. manual welding is adopted for welding the transition layer and the multiple layers with strict welding quality requirements, so that the welding quality of the transition layer and the multiple layers is easily ensured;
3. the selection of the welding material and the welding process of the transition layer is beneficial to preventing the diffusion and the aggregation of elements in the welding seam, and can reduce and avoid the generation of harmful tissues in the welding seam.
Description of the drawings:
FIG. 1 is a cross-sectional view of a composite plate weld of the present invention:
in the figure: 1-composite material; 2-a substrate; 3, forming a bottom welding seam on the side of the composite material; 4, filling welding seams by using the composite material side base materials; 5-transition layer welding seam; 6-welding the composite material; 7-welding the back substrate of the composite material.
The specific implementation mode is as follows:
taking a 4mm316L +18mmQ345R composite plate as an example, the welding of the welding seams of the composite plate is carried out, and the welding method comprises the following steps:
1. the composite board is processed into a symmetrical X-shaped groove by a plasma cutting machine, the groove angle is 60 +/-1 degrees, the groove gap is 2mm, and the size of the truncated edge is 4 mm.
2. A base material on the composite side is subjected to backing weld, a J507 welding rod is adopted for manual welding, the welding rod is baked for 2 hours at 350 ℃ before welding, the welding current is 250-400A during welding, the welding voltage is 28-32V, the welding speed is 300-450 mm/Min, the dry elongation is 15-25 mm, after backing is completed, a coating is knocked off, and the smooth and smooth weld joint is polished by a corner grinder.
3. Welding the base material filling welding seam (4) on the composite material side by adopting submerged automatic arc welding, wherein the welding material is H08A welding wire, the welding current is 350A-500A, the welding voltage is 28-32V, the welding speed is 400-600 mm/Min, the dry elongation is 20-30 mm, the spreading height of the welding agent is 20-30 mm, and the welding height is 2mm lower than the bottom of the composite material.
4. And (3) welding the transition layer on the composite material side by adopting manual welding with a CHS102 welding rod, baking for 2 hours at 300 ℃ before welding, wherein the welding current is 400-500A, the welding voltage is 28-32V, the welding speed is 300-400 mm/Min, the dry elongation is 15-25 mm, and after the welding is finished, the height of the welding seam of the transition layer is 1mm higher than that of the bottom of the composite material.
5. And (3) multi-layer welding, wherein an A022 welding rod is adopted for manual welding, the welding is baked for 2 hours at 300 ℃ before welding, the welding current is 400A-500A, the welding voltage is 28-32V, the welding speed is 300-400 mm/Min, the dry elongation is 20-30 mm, and after the welding is finished, the height of a welding seam of the composite material is 1.5-2 mm higher than that of the composite material.
6. Welding a back base layer, adopting submerged automatic arc welding, adopting an H08A welding wire as a welding material, welding current of 350-500A, welding voltage of 28-32V, welding speed of 400-600 mm/Min, dry elongation of 20-30 mm, spreading height of a welding agent of 20-30 mm, and after welding, welding seam height of a base material is 1.5-2 mm higher than that of the base material.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (7)

1. A method for welding composite steel plates is characterized by comprising the following steps: (a) groove machining: processing the composite board into a symmetrical X-shaped groove by a plasma cutting machine, wherein the groove angle is 60 +/-1 degrees; (b) groove cleaning and plate combination: after the groove is machined, polishing the groove to be bright by using a grinding wheel machine, removing surface impurities and a surface heat influence layer, assembling different composite boards, and fixing by spot welding; (c) welding the base layer on the double-layer side: manual electric arc welding is adopted for the composite side backing weld seam (3), after backing is completed, the surface of the weld seam is polished to be bright and flat by a grinder, then the backing weld seam (4) is filled with the composite side base material by adopting submerged automatic arc welding, and the filling height is 1.5-2 mm lower than the bottom of the composite layer; (d) welding a transition layer: manually welding a transition layer welding seam (5) by adopting a transition layer welding rod, wherein the height of the welding seam is 1-2 mm higher than the bottom of the compound layer; (e) multilayer welding: the composite layer is welded by manual welding, and the height of a composite layer welding seam (6) is 1-2 mm higher than the top of the composite layer; (f) welding a back base layer: the method comprises the steps of turning over a composite plate, polishing the bottom of a welding seam by using a grinding wheel to enable the welding seam to be bright and smooth, then filling a welding seam (7) on the back of the composite material by using high-current submerged arc automatic welding, wherein the height of the welding seam is 1-2 mm higher than the top of the base material, the thickness of a composite layer in the stainless steel composite plate is 0.5-5.0 mm, and the thickness of a base layer is 4.0-22.0 mm.
2. The method for welding composite steel plates according to claim 1, wherein the groove gap is 0-3 mm, and the truncated edge size is 3-4 mm.
3. The method for welding the clad steel plate as claimed in claim 1, wherein the base material on the clad layer side is primed and manually welded by using a J507 welding rod, the welding rod is baked for 2 hours at 350 ℃ before welding, the welding current is 250A-400A during welding, the welding voltage is 28-32V, the welding speed is 300-450 mm/Min, and the dry elongation is 15-25 mm.
4. The method for welding clad steel plates according to claim 1, wherein the welding seam (4) is filled with the base material on the clad material side, submerged automatic arc welding is adopted, the welding material is H08A welding wire, the welding current is 350A-500A, the welding voltage is 28-32V, the welding speed is 400-600 mm/Min, the dry elongation is 20-30 mm, and the spreading height of the welding flux is 20-30 mm.
5. The method for welding the clad steel plates according to claim 1, wherein the transition layer on the clad steel plate side is welded by manual welding with a CHS102 welding rod, the welding rod is baked for 2 hours at 300 ℃ before welding, the welding current is 400A-500A, the welding voltage is 28-32V, the welding speed is 300-400 mm/Min, and the dry elongation is 15-25 mm.
6. The method for welding the clad steel plate as claimed in claim 1, wherein the clad steel plate is manually welded by using an A022 welding rod, the welding rod is baked for 2 hours at 300 ℃ before welding, the welding current is 400A-500A, the welding voltage is 28-32V, the welding speed is 300-400 mm/Min, and the dry elongation is 20-30 mm.
7. The method for welding the clad steel plates according to claim 1, wherein the welding of the back substrate is performed by submerged automatic arc welding, the welding material is H08A welding wire, the welding current is 350A-500A, the welding voltage is 28-32V, the welding speed is 400-600 mm/Min, the dry elongation is 20-30 mm, and the spreading height of the welding agent is 20-30 mm.
CN201911005753.0A 2019-10-22 2019-10-22 Composite steel plate welding method Withdrawn CN110695489A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111168242A (en) * 2020-01-19 2020-05-19 新疆大学 Laser arc series welding method for connecting TA2/T2 explosion welding composite plates

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111168242A (en) * 2020-01-19 2020-05-19 新疆大学 Laser arc series welding method for connecting TA2/T2 explosion welding composite plates

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Application publication date: 20200117