A welding method for single-sided welding and double-sided forming of a940 steel

A single-sided welding double-sided, welding method technology, applied in welding equipment, welding/welding/cutting items, manufacturing tools, etc., can solve the problems of high alloy composition, poor fluidity of the molten pool, etc., to ensure the inherent quality of the weld, The effect of satisfying the magnetic permeability and improving the fluidity of the molten pool

Active Publication Date: 2022-04-29
WUHAN WUCHUAN MEASUREMENT & TEST
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Problems solved by technology

[0002] A940 steel is a high-alloy austenitic stainless steel with high alloy composition and poor fluidity of molten pool. At present, its welding method is in the stage of exploration, and the single-side welding and double-side forming welding process of A940 steel has not yet been developed. Among them, the chemical composition of A940 steel is shown in the table 1. In actual processing, the requirements for mechanical properties of welded joints are shown in Table 2

Method used

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  • A welding method for single-sided welding and double-sided forming of a940 steel
  • A welding method for single-sided welding and double-sided forming of a940 steel
  • A welding method for single-sided welding and double-sided forming of a940 steel

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Embodiment 1

[0035] The single-sided welding and double-sided forming welding of the steel plate includes the following steps:

[0036] (1) The groove of A940 steel plate 10 should be processed by plasma cutting or carbon arc gouging. See the attached manual for the picture figure 1 .

[0037] (2) The gas shielded welding method is used for welding, using a welding machine with pulse function, the welding wire is 1.0mmA940MIG welding wire, and the shielding gas is 97.5% Ar+2.5% CO 2 Mixed gas, flow rate 25L / min.

[0038] (3) The welding direction adopts the left-hand method, and the temperature between passes is ≤100°C. After the slag removal of the bottom pass, it must be ground to reveal the metallic luster, and then the weld bead should be ground according to the slag removal condition.

[0039] (4) The welding parameters are shown in Table 1 below, and the weld bead distribution and weld appearance dimensions are shown in the appendix of the manual. figure 2 .

[0040] Table 1 We...

Embodiment 2

[0045] In embodiment 2, only the shielding gas is changed to 99.9% Ar+0.1% CO2 mixed gas, all other test parameters are the same as embodiment 1, and the test welding is carried out.

Embodiment 3

[0047] In Example 3, only the shielding gas was changed to pure argon, and all other test parameters were the same as in Example 1, and the welding test was carried out.

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Abstract

The invention provides a single-sided welding and double-sided forming welding method for A940 steel, which adopts a special ceramic liner and a gas shielded welding welding method to realize single-sided welding and double-sided forming of A940 steel. The single-sided welding and double-sided forming welding method of A940 steel solves the problem that the steel can not be welded with double-sided welding structure in engineering applications, and improves the welding efficiency. The test plate welded by the invention has beautiful welding seam shape, meets the requirements in size, non-destructive testing, ray according to GB / T3323 rating and meets the requirements of class I, penetration according to NB / T47013.5 rating meets the requirements of class I, all mechanical properties are excellent and meet GJB4000‑2000 requirements.

Description

technical field [0001] The invention relates to the field of welding engineering, and more specifically relates to a single-side welding and double-side forming welding method for A940 steel. Background technique [0002] A940 steel is a high-alloy austenitic stainless steel with high alloy composition and poor fluidity of molten pool. At present, its welding method is in the stage of exploration. The single-side welding and double-side forming welding process of A940 steel has not yet been developed. Among them, the chemical composition of A940 steel is shown in the table 1. In actual processing, the requirements for mechanical properties of welded joints are shown in Table 2. [0003] Table 1 Chemical composition of A940 steel plate [0004] [0005] Table 2 Mechanical properties of weld deposited metal [0006] [0007] In view of the requirement of welding performance of A940 steel in engineering, it is urgent to invent a method for welding A940 steel to solve th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K28/02B23K103/04
CPCB23K28/02B23K2103/05
Inventor 胡丽周陈齐谢雪新
Owner WUHAN WUCHUAN MEASUREMENT & TEST
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