CN113172357A - Method for welding domestic European standard steel plate - Google Patents
Method for welding domestic European standard steel plate Download PDFInfo
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- CN113172357A CN113172357A CN202110398844.6A CN202110398844A CN113172357A CN 113172357 A CN113172357 A CN 113172357A CN 202110398844 A CN202110398844 A CN 202110398844A CN 113172357 A CN113172357 A CN 113172357A
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- welding
- steel plate
- standard steel
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- european standard
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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
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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
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
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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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a method for welding a domestic European-standard steel plate, which aims at welding a domestic European-standard steel plate S690Q thick plate and selects 83 kg-grade solid welding wires with high-strength matching. Preheating at 120 deg.C, welding current not more than 320A, interlayer temperature not more than 190 deg.C, actually controlling welding heat input not more than 1.29, and performing thermal aging treatment after welding. The thickness range delta 20 mm-delta 70mm of the welded steel plate is suitable. The welding of the domestic European standard steel plate S690Q thick plate is realized, the weldability and the economical efficiency are ensured, the welding difficulty is reduced, the welding quality is ensured, the cost is saved, and the high-reliability design concept of the hydraulic support is realized.
Description
Technical Field
The invention relates to a welding technology of a coal mine hydraulic support, in particular to a method for welding a domestic European standard steel plate.
Background
At present, the manufacturing and the use of the coal mine hydraulic support are developing towards large-scale and heavy-duty high-end directions, and with the continuous improvement of design load (supporting strength), the high-performance support requires that the endurance test times reach 60000 times or more under the condition that a main material adopts 690 MPa-grade high-strength steel. From the angle, the high reliability of the hydraulic support is imperative; at present, the support is generally made of European standard S series steel, the corresponding yield strength of the European standard S690Q quenched and tempered steel with the yield strength of 690MPa, the steel has good ductility and toughness, the welding wire has strong matching performance, and the large and thick plate has stable comprehensive performance.
The high-reliability hydraulic support is mainly realized by adopting a domestic European-standard high-strength steel plate as a main structural member, and an S690Q-grade thick plate is selected from the European-standard steel plate in the structural member. The thick plate more than 50 has high requirement on the performance of the welding joint and has larger difficulty.
In the prior art, domestic European standard steel plates are welded by equal-matching solid 80 kg-grade welding wires, and the strength of a welding joint cannot meet the requirement of tensile strength of a design requirement when a thick plate is welded by more than 50; the domestic European standard steel plate is welded by a low-matching solid 76 kg-grade welding wire, and the strength is low and cannot meet the strength of a welding joint.
Disclosure of Invention
The invention aims to provide a method for welding domestic European standard steel plates.
The purpose of the invention is realized by the following technical scheme:
the method for welding the domestic European standard steel plate aims at welding the domestic European standard steel plate S690Q thick plate, and selects 83 kg-grade solid welding wires with high strength matching.
According to the technical scheme provided by the invention, the method for welding the domestic European-standard steel plate provided by the embodiment of the invention realizes the welding of the domestic European-standard steel plate S690Q thick plate, ensures the weldability and the economy, reduces the welding difficulty, ensures the welding quality, saves the cost and realizes the high-reliability design concept of the hydraulic support.
Drawings
Fig. 1 is a schematic view of a welding joint for welding domestic european standard steel plates according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in further detail below. Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art.
The invention discloses a method for welding domestic European standard steel plates, which comprises the following steps:
aiming at the welding of a domestic European standard steel plate S690Q thick plate, 83 kg-grade solid welding wires with high strength matching are selected.
Preheating at 120 deg.C, welding current not more than 320A, interlayer temperature not more than 190 deg.C, actually controlling welding heat input not more than 1.29, and performing thermal aging treatment after welding.
The thickness range delta 20 mm-delta 70mm of the welded steel plate is suitable.
The method for welding the domestic European-standard steel plate realizes the welding of the domestic European-standard steel plate S690Q thick plate, ensures the weldability and the economy, reduces the welding difficulty, ensures the welding quality, saves the cost and realizes the high-reliability design concept of the hydraulic support.
The specific embodiment is as follows:
the method is characterized in that research is carried out on weldability of domestic European-standard steel plates, a base metal verification test and a welding wire deposited metal contrast test are carried out, a welding joint test is carried out, a high-strength matched 83-kilogram-grade solid welding wire is determined, preheating temperature and interlayer temperature are determined, and welding heat input is optimized: the welding current, the welding voltage and the welding speed which can be executed under working conditions are realized.
The process test contents of the specific embodiment are as follows:
first, verification test of parent metal
Test results of base Material
The test proves that: the European standard steel plate has qualified S690-delta 30 mechanical properties and small anisotropy of mechanical properties
Second, comparative test of welding wire deposited metal
Welding wire test scheme
Test results of welding wire
Through comprehensive performance comparison, a GHS-83 welding wire is selected to carry out a welding joint test on S690Q
Third, weld joint test
Weld joint test scheme
Test of welded joint
The weld joint is shown in fig. 1.
The test result shows that: preheating 120 ℃ in the welding process, welding current is less than or equal to 320A, interlayer temperature is less than or equal to 190 ℃, actually controlling welding heat input to be less than or equal to 1.29, and carrying out thermal aging treatment after welding to ensure welding quality and mechanical properties of a welding joint.
The specific technical key points for optimizing and selecting the process parameters are as follows:
the process is innovative, and the weldability of the domestic European-standard steel plate thick plate is improved;
by controlling the temperature and parameters in the welding process, the preheating temperature is more than or equal to 120 ℃, the welding current is less than or equal to 320A, the interlayer temperature is less than or equal to 190 ℃, the welding quality and the mechanical property of a welding joint are ensured, the tensile strength meets the strength design requirement, and the high-reliability design concept is realized.
The welding heat input is optimized, the welding heat input is controlled to be less than or equal to 1.29, the working condition production condition is met, and the welding difficulty is reduced.
The welding steel plate thickness ranges are delta 20, delta 25, delta 30, delta 40, delta 50, delta 60 and delta 70.
The method is suitable for the postweld heat treatment mode: and (4) carrying out thermal aging after welding.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (3)
1. The method for welding the domestic European standard steel plate is characterized in that 83 kilogram-grade solid welding wires with high strength matching are selected for welding the domestic European standard steel plate S690Q thick plate.
2. The method for welding domestic european standard steel plates according to claim 1, wherein the preheating is performed at 120 ℃, the welding current is not more than 320A, the interlaminar temperature is not more than 190 ℃, the actual controlled welding heat input is not more than 1.29, and the thermal aging treatment is performed after welding.
3. The method for welding domestic european standard steel plates according to claim 1 or 2, wherein the range of suitable welded steel plate thickness δ 20mm to δ 70 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110398844.6A CN113172357A (en) | 2021-04-12 | 2021-04-12 | Method for welding domestic European standard steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110398844.6A CN113172357A (en) | 2021-04-12 | 2021-04-12 | Method for welding domestic European standard steel plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113172357A true CN113172357A (en) | 2021-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110398844.6A Pending CN113172357A (en) | 2021-04-12 | 2021-04-12 | Method for welding domestic European standard steel plate |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111375926A (en) * | 2020-04-20 | 2020-07-07 | 中煤北京煤矿机械有限责任公司 | Method for welding ultrahigh-strength steel plate Q1150 of hydraulic support |
| CN111843258A (en) * | 2020-06-02 | 2020-10-30 | 中煤北京煤矿机械有限责任公司 | Welding method for creep-resistant steel of hydraulic support |
-
2021
- 2021-04-12 CN CN202110398844.6A patent/CN113172357A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111375926A (en) * | 2020-04-20 | 2020-07-07 | 中煤北京煤矿机械有限责任公司 | Method for welding ultrahigh-strength steel plate Q1150 of hydraulic support |
| CN111843258A (en) * | 2020-06-02 | 2020-10-30 | 中煤北京煤矿机械有限责任公司 | Welding method for creep-resistant steel of hydraulic support |
Non-Patent Citations (6)
| Title |
|---|
| 万斌等: "国内外690MPa高强钢实芯焊丝的研究及应用", 《金属加工(热加工)》 * |
| 刘俊等: "工程机械用调质高强钢Q690焊接性试验研究", 《焊接技术》 * |
| 董现春等: "Q550D贝氏体高强钢板焊接接头强度匹配的选择", 《机械工程材料》 * |
| 迟利峰: "液压支架结构件设计制造研究", 《能源技术与管理》 * |
| 邓波: "高端液压支架高强钢焊接配套实芯焊丝的应用", 《煤炭科学技术》 * |
| 金鹏等: "液压支架用Q690高强钢焊接接头的强韧性匹配", 《热加工工艺》 * |
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Application publication date: 20210727 |