Welding material for ZG33Cr25Ni14

A zg33cr25ni14, welding material technology, applied in the direction of welding/cutting medium/material, welding medium, welding equipment, etc., can solve the problems of hidden dangers in stability and safety, unsatisfactory high-temperature mechanical properties of welds, etc., and achieve superior synergistic functions , high temperature mechanical properties advantages, the effect of 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 ZG33Cr25Ni14 products in high-temperature application environments hidden dangers, thus limiting the application of ZG33Cr25Ni14 products in certain high-temperature environments that require mechanical properties

Method used

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  • Welding material for ZG33Cr25Ni14
  • Welding material for ZG33Cr25Ni14

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0020] GTAW welding process is used to weld the above-mentioned welding samples; the welding machine model used is WSM-4000 inverter pulse argon arc welding machine; the welding material used is a welding wire with a diameter of φ2.4mm, and its composition is: 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 between the welding machine and the welding sample is direct current connection. The welding process includes the following steps:

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

[0023] (2) ...

Embodiment 2

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

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

[0028] The welding process includes the following steps:

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

[0030] (2) Perform bottom welding on the welding sample, with a welding current of 90A, a voltage of 12V, and a welding speed of about 0.8mm / s, with two layers welded;

[0031] (3) Fill welding and cover weldin...

Embodiment 3

[0032] Example 3 (comparative)

[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 ZG33Cr25Ni14 and relates to the field of welding materials. The welding material comprises the following chemical components in percentage by mass: equalto or less than 0.5% of C, 16.0-18.0% of Cr, 6.0-10.0% of Fe, equal to or less than 1.0% of Mn, 1.5-3.0% of Nb, 0.6-1.0% of Si, equal to or less than 0.015% of S, equal to or less than 0.015% of P and equal to or greater than 70.0% of Ni. A welding seam obtained from the welding material is excellent in surface topography, has excellent corrosion resistance, normal temperature mechanical propertyand remarkably improved high temperature mechanical property, can greatly improve the quality of a product, and prolongs the service life of the product.

Description

Technical field [0001] The invention belongs to the technical field of welding materials, and specifically relates to a welding material for ZG33Cr25Ni14. Background technique [0002] The high temperature resistant casting alloy ZG33Cr25Ni14 has the following chemical composition (mass percentage): C0.28~0.38%, Cr 24.0~28.0%, Ni 12.0~14.0%, Mn≤1.5%, Mo≤0.5%, Si0.5~2.0% , S≤0.03%, P≤0.03%, Fe margin. The alloy has excellent high temperature corrosion resistance, oxidation resistance and hot and cold processing properties, and is widely used in the petrochemical field. [0003] Alloy applications are 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 the quality is not good, the weld will become the "short board" of the overall performance of the product. Therefore, the matching welding materials are...

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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