Welding material for ZG45Cr25Ni35NbM

A technology for welding materials and welding processes, applied in welding/cutting media/materials, welding media, welding equipment, etc., can solve problems such as hidden dangers in stability and safety, unsatisfactory high-temperature mechanical properties of welds, etc., and achieve superior synergy Function, high temperature mechanical properties advantages, the effect of excellent corrosion resistance

Inactive Publication Date: 2018-09-07
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 ERNiCr-3 is still insufficient as a welding material for ZG45Cr25Ni35NbM, and the outstanding performance is that the high-temperature mechanical properties of the weld are not ideal
This defect makes the stability and safety of ZG45Cr25Ni35NbM products in high-temperature application environments hidden dangers, thus limiting the application of ZG45Cr25Ni35NbM products in certain high-temperature environments that require mechanical properties

Method used

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  • Welding material for ZG45Cr25Ni35NbM
  • Welding material for ZG45Cr25Ni35NbM

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 ZG45Cr25Ni35NbM, and relates to the field of welding materials. The welding material for the ZG45Cr25Ni35NbM comprises the following chemical componentsof, by mass, less than or equal to 0.5% of C, 16.0-18.0% Cr, 6.0-10.0% of Fe, less than or equal to 1.0% of Mn, 1.5-3.0% of Nb, 0.6-1.0% of Si, less than or equal to 0.015% of S, less than or equal to0.015% of P, and larger than or equal to 70.0% of Ni. The weld joint obtained from the welding material is good in surface morphology, and has excellent corrosion resistance and normal temperature mechanical property, moreover, the high-temperature mechanical property is obviously improved; the quality of the product can be greatly improved and the service life of the product 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 ZG45Cr25Ni35NbM. Background technique [0002] The high temperature resistant casting alloy ZG45Cr25Ni35NbM has the following chemical composition (mass percentage): C0.4~0.5%, Cr 23.0~27.0%, Ni 33.0~37.0%, Mn≤1.0%, Si≤1.5%, S≤0.03%, P ≤0.03%, trace amount of Ti+Zr, balance of Fe. 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 w...

Claims

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Application Information

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IPC IPC(8): B23K35/30
CPCB23K35/304
Inventor 李泳澎
Owner 李泳澎
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