Welding material for ZG40Cr25Ni20

A welding material and welding process technology, applied in the direction of welding/cutting medium/material, welding medium, welding equipment, etc., can solve problems such as unsatisfactory high-temperature mechanical properties of welds, hidden dangers in stability and safety, and achieve superior synergy The effect of function, high temperature mechanical properties, and excellent corrosion resistance

Inactive Publication Date: 2018-08-28
李泳澎
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is found in the application that the high temperature mechanical properties of the weld are not ideal
This defect makes the stability and safety of ZG40Cr25Ni20 products in high-temperature application environments hidden dangers, thus limiting the application of ZG40Cr25Ni20 products in certain high-temperature environments that require mechanical properties

Method used

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  • Welding material for ZG40Cr25Ni20
  • Welding material for ZG40Cr25Ni20

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Two nickel-based rolled plates with specifications of 450mm×75mm×20mm were selected as welding samples, and a V-shaped butt groove was adopted. The groove type was: the length of the blunt side was 1mm, and the groove angle was 60°.

[0020] The above-mentioned welding samples were welded by GTAW welding process; the welding machine model used was WSM-4000 inverter pulse argon arc welding machine; the welding material used was welding wire with a diameter of φ2.4mm, and its composition was: C 0.03% , Cr 16.8%, Fe7.2%, Mn 0.4%, Nb 2.45%, Si 0.85%, S 0.002%, P 0.002%, Ni balance.

[0021] The connection mode between the welding machine and the welding sample is direct current connection. The welding process includes the following steps:

[0022] (1) Clean the groove surface of the sample to be welded, keep it clean and dry, then connect the groove according to the above-mentioned V-shaped butt joint method, fix the position by spot welding, and then pass argon gas for pr...

Embodiment 2

[0026] Two nickel-based pipe sections with specifications of φ120mm (outer diameter) × 15mm (wall thickness) × 150mm (length) were selected as welding samples, and U-shaped butt joint grooves were adopted. The groove form was blunt edge length 1mm, radius 4mm, Groove angle 25°.

[0027] Using the same welding consumables, equipment and welding process as in Example 1, the above welding samples were welded. The connection mode between the welding machine and the welding sample is direct current connection.

[0028] The welding process includes the following steps:

[0029] (1) Clean the groove surface of the sample to be welded, keep it clean and dry, then connect the groove according to the above U-shaped butt joint method, fix the position by spot welding, and then pass argon gas for protection;

[0030] (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;

[0031]...

Embodiment 3

[0032] Embodiment 3 (comparison)

[0033] The welding material in Example 1 was changed to ERNiCr-3 welding wire with a diameter of φ2.4mm, and other conditions remained unchanged.

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Abstract

The invention discloses a welding material for ZG40Cr25Ni20 and relates to the field of welding materials. The welding material for ZG40Cr25Ni20 is composed of the following chemical components of, bymass, no greater than 0.5% of C, 16.0-18.0% of Cr, 6.0-10.0% of Fe, no greater than 1.0% of Mn, 1.5-3.0% of Nb, 0.6-1.0% of Si, no greater than 0.015% of S, no greater than 0.015% of P and no less than 70.0% of Ni. Weld joints prepared from the welding material have good surface appearance and excellent corrosion resistance and normal-temperature mechanical properties, and show obviously-improvedhigh-temperature mechanical properties, the quality of the 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 technical field of welding materials, and in particular relates to a welding material used for ZG40Cr25Ni20. Background technique [0002] The high temperature resistant casting alloy ZG40Cr25Ni20 has the following chemical composition (mass percentage): C0.4~0.5%, Cr23.0~27.0%, Ni 18.0~22.0%, Mn≤1.0~1.5%, Mo≤0.5%, Si0.5 ~2.0%, S≤0.03%, P≤0.03%, Fe balance. The alloy has excellent high temperature corrosion resistance, oxidation resistance and cold and hot processing properties, and is widely used in the petrochemical field. [0003] The application of alloys is inseparable from welding, and the quality of welds is an important factor affecting the overall performance of metal products (such as mechanical properties and corrosion resistance). If the welding material is improperly selected or of poor quality, the weld will become the "short board" of the overall performance of the product. Complementary welding consumable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30
CPCB23K35/304
Inventor 李泳澎
Owner 李泳澎
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