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Welding process applied to Inconel 600

A welding process and alloy technology, which is applied in the welding process field of Inconel600 alloy, can solve the problems of unsatisfactory high-temperature mechanical properties of welds, hidden dangers in the stability and safety of Inconel600 alloy products, etc., and achieve excellent performance results

Active Publication Date: 2014-06-18
江苏双勤新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, these welding processes cannot fully exert the excellent performance of Inconel600, and there are obvious deficiencies, especially in the unsatisfactory high-temperature mechanical properties of the weld
This defect makes the stability and safety of Inconel600 alloy products in high-temperature application environments hidden dangers, thus limiting the application of Inconel600 alloy products in certain high-temperature environments that require mechanical properties

Method used

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  • Welding process applied to Inconel 600
  • Welding process applied to Inconel 600
  • Welding process applied to Inconel 600

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Two Inconel600 rolled plates with specifications of 450mm×75mm×20mm were selected as welding samples, and a V-shaped butt joint groove was adopted. The groove type was: the length of the blunt side was 1mm, and the groove angle was 60°. docking structure such as figure 1 shown.

[0025] To weld the above welding samples, the welding machine model used is WSM-4000 inverter pulse argon arc welding machine; the welding material used is welding wire with a diameter of φ2.4mm, and its composition is: C 0.03%, Cr 16.8% , Fe 7.2%, Mn 0.4%, Nb 2.45%, Si 0.85%, S 0.002%, P 0.002%, Ni balance.

[0026] The welding process includes the following steps:

[0027] (1) Clean the surface of the groove to be welded of the welding sample, keep it clean and dry, then connect the groove according to the above-mentioned butt joint method, fix the position with spot welding, and then pass argon gas for protection; the welding machine and the to-be-welded The sample is connected in a dire...

Embodiment 2

[0031] Two Inconel600 pipe sections with specifications of φ120mm (outer diameter) × 15mm (wall thickness) × 150mm (length) were selected as welding samples, and a U-shaped butt joint groove was adopted. Mouth angle 25°. The docking structure is attached figure 2 shown.

[0032] The above welding samples were welded using the same welding consumables and equipment as in Example 1.

[0033] The welding process includes the following steps:

[0034] (1) Clean the surface of the groove to be welded of the welding sample, keep it clean and dry, then connect the groove according to the above-mentioned butt joint method, fix the position with spot welding, and then pass argon gas for protection; the welding machine and the to-be-welded The sample is connected in a direct current connection;

[0035] (2) Carry out bottom welding on the welding sample, the welding current is 90A, the voltage is 12V, the welding speed is about 0.8mm / s, and two layers are welded;

[0036] (3) Carr...

Embodiment 3

[0037] Embodiment 3 (comparison)

[0038] Using the same welding sample, butt joint method and equipment as in Example 1, it was welded with ERNiCr-3 welding wire with a diameter of φ2.4mm as the welding material.

[0039] The welding process includes the following steps:

[0040] (1) Clean the surface of the groove to be welded of the welding sample, keep it clean and dry, then connect the groove according to the above-mentioned butt joint method, fix the position with spot welding, and then pass argon gas for protection; the welding machine and the to-be-welded The sample is connected in a direct current connection;

[0041] (2) Underground welding is performed on the sample to be welded, the welding current is 110A, the voltage is 15V, the welding speed is about 1.1mm / s, and two layers are welded;

[0042] (3) Carry out filling welding and cover welding, welding current 130A, voltage 20V, welding speed about 1.4mm / s.

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Abstract

The invention discloses a welding process applied to Inconel 600, and belongs to the field of the GTAW process. Preheating and heat treatment are not needed by the welding process. By means of the adjustment of technological parameters and the improvement in welding materials, generated weld joints not only have good surface appearances, corrosion resistance and room temperature mechanical properties, but also show up obviously-improved high-temperature mechanical properties, quality of products can be greatly improved, and the service life of the products can be greatly prolonged.

Description

technical field [0001] The invention belongs to the field of material processing, and in particular relates to a welding process suitable for Inconel600 alloy. Background technique [0002] Welding is an essential process in the application of metal structural parts, especially large structural parts. Compared with the base metal, the weld produced by welding usually has obvious gaps in mechanical properties, corrosion resistance, etc., and it is easy to become the "short board" of the overall quality and performance of the product. Therefore, the welding process is a key factor affecting the performance of metal products. [0003] Inconel600 is a nickel-based alloy with excellent high-temperature corrosion resistance, oxidation resistance and cold and hot processing performance, and is widely used in titanium dioxide, chemical industry, nuclear power and other fields. At present, some conventional welding techniques have been used for Inconel600 alloy. The welding methods...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/16B23K9/235B23K9/23B23K35/30
CPCB23K9/16B23K9/23B23K9/235B23K35/304B23K2103/08
Inventor 李勤峰
Owner 江苏双勤新能源科技有限公司
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