CN108500505A

CN108500505A - A kind of welding material for ZG50Ni35Cr17

Info

Publication number: CN108500505A
Application number: CN201711424687.1A
Authority: CN
Inventors: 李泳澎
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-07-27
Filing date: 2018-07-27
Publication date: 2018-09-07

Abstract

The invention discloses a kind of welding materials for ZG50Ni35Cr17, are related to field of welding material, by mass percentage, are made of following chemical composition：C≤0.5%, Cr 16.0~18.0%, Fe 6.0~10.0%, Mn≤1.0%, Nb 1.5~3.0%, Si 0.6~1.0%, S≤0.015%, P≤0.015%, Ni >=70.0%.The face of weld pattern obtained by the welding material is good, not only has excellent corrosion resistance and ambient temperature mechanical properties, but also show the mechanical behavior under high temperature significantly improved, can greatly promote the quality and service life of product.

Description

A kind of welding material for ZG50Ni35Cr17

Technical field

The invention belongs to technical field of welding materials, and in particular to a kind of welding material for ZG50Ni35Cr17.

Background technology

High temperature resistant casting alloy ZG50Ni35Cr17 has following chemical composition（Mass percent）：C0.4~0.6%, Cr 15.0~19.0%, Ni 33.0~37.0%, Mo≤0.5%, Mn≤1.5%, Si0.5 ~ 2.0%, S≤0.03%, P≤0.03%, Fe Surplus.The alloy has excellent high-temperature corrosion resistance, anti-oxidant and cold and hot working performance, is widely used in petrochemical field.

Alloyapplication be unable to do without welding, and weldquality is metal product overall performance（Such as mechanical property, corrosion resistance Energy）An important factor in order.If welding material selects improper or quality bad, weld seam will be as product overall performance " short slab ".Therefore, mating welding material is considered as an important component in alloy research and development field.

Feature strong to Ni-based fire check sensibility, liquid fluidity is poor can effectively avoid not in the material welding process Phenomenon is fused, weld porosity rate is low, and room temperature satisfactory mechanical property.But found in applying, weld seam mechanical behavior under high temperature is paid no attention to Think.This defect makes stability and safety of the ZG50Ni35Cr17 products under high temperature application environment, and there are hidden danger, thus Limit application of the ZG50Ni35Cr17 products under certain hot environments required to mechanical property.

In view of performance especially high-temperature mechanics are researched and developed in many places to ZG50Ni35Cr17 in hot environment in practical applications Can more preferably mating welding material just seem particularly necessary.

Invention content

In view of the deficiencies of the prior art, the purpose of the present invention is to provide a kind of welding materials for ZG50Ni35Cr17 Material.Not only there is good surface topography by the weld seam that the welding material obtains（The defects of being not in crackle, stomata, undercut） And corrosion resistance, and there is excellent room temperature and mechanical behavior under high temperature, it can greatly promote quality and the use of product Service life.

A kind of welding material for ZG50Ni35Cr17 provided by the invention, by mass percentage, by following chemistry At being grouped as：C≤0.5%, Cr 16.0~18.0%, Fe 6.0~10.0%, Mn≤1.0%, Nb 1.5~3.0%, Si 0.6~ 1.0%, S≤0.015%, P≤0.015%, Ni >=70.0%.

Preferably, in welding material of the invention, C≤0.5%, Cr 16.0~17.0%, Fe 7.0~8.0 %, Mn≤ 0.7%, Nb 2.0~2.5%, Si 0.8~1.0%, S≤0.015%, P≤0.015%, Ni >=72.0%.

It is further preferable that in welding material of the present invention, C 0.3%, Cr 16.8%, Fe 7.2%, Mn 0.4%, Nb 2.45%, Si 0.85%, S 0.002%, P 0.002%, Ni surplus.

Welding material of the present invention for ZG50Ni35Cr17 can be used with the various forms of this field routine, such as： Welding wire.The technique that welding wire is prepared by the welding material of principal component is well known to those skilled in the art.For example, can To prepare welding wire through drawing, alignment and cut-out step.It can be made into various sizes according to needs, welding wire are used.

The present invention also aims to provide purposes of the above-mentioned welding material in welding ZG50Ni35Cr17.

Known various normal welding works can be used when carrying out ZG50Ni35Cr17 welding using the welding material of the present invention Skill, including but not limited to gas metal-arc welding, non-consumable gas shielded arc welding, automatic welding etc., wherein it is preferred that using being not necessarily to The non-consumable gas shielded arc welding of preheating and heat treatment（GTAW）Technique.

The welding material and welding procedure of the present invention are suitable for the ZG50Ni35Cr17 materials of all kinds of patterns, including but unlimited In Ni-based wire rod, plank, tubing etc..

Ni-based known welding material is used in compared with the existing technology, the present invention to be by adjusting each ingredient in welding material Type and ratio so that more superior synergistic function can be played between each component.The weld seam of welding material welding The defects of being not in crackle, stomata, undercut, and there is excellent corrosion resistance, room temperature and mechanical behavior under high temperature；Compared to ERNiCr-3, it shows clear superiority in terms of mechanical behavior under high temperature.

Description of the drawings

Fig. 1 is the structural schematic diagram that welded specimen uses V-type butting grooves in embodiment 1；

Fig. 2 is the structural schematic diagram that welded specimen uses U-shaped butting grooves in embodiment 2.

Specific implementation mode

Below with reference to embodiment with the present invention will be further described, but should not be construed as protecting model to the present invention The limitation enclosed.

Embodiment 1

Select two block specifications be 450mm × 75mm × 20mm Ni-based rolled plate as welded specimen, slope is docked using V-type Mouthful, slope type is：Root face length 1mm, 60 ° of bevel angle.

Above-mentioned welded specimen is welded using GTAW welding procedures；The welding machine model WSM-4000 contravariants used Pulse argon arc welding machine；The wlding used is the welding wire of a diameter of φ 2.4mm, and ingredient 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 surplus.

The connection type of welding machine and welded specimen is straight polarity direct current.Welding process includes the following steps：

（1）The groove face of sample to be welded is cleaned out, cleaning drying is kept, then docks groove according to above-mentioned V-type Mode is docked, and good position is fixed with spot welding, is then led to argon gas and is protected；

（2）Bottoming welding, welding current 95A, voltage 13V, weldering speed about 1.0mm/s, completely two layers of weldering are carried out to welded specimen；

（3）It is filled weldering and cosmetic welding, welding current 110A, voltage 14V, weldering speed about 1.2mm/s.

Embodiment 2

It is φ 120mm to select two sections of specifications（Outer diameter）×15mm（Wall thickness）×150mm（Length）Ni-based pipeline section as welding Sample, using U-shaped butting grooves, groove type is root face length 1mm, radius 4mm, 25 ° of bevel angle.

Using wlding same as Example 1, equipment and welding procedure, above-mentioned welded specimen is welded.Welding machine with The connection type of welded specimen is straight polarity direct current.

Welding process includes the following steps：

（1）The groove face of sample to be welded is cleaned out, cleaning drying is kept, then by groove according to above-mentioned U-shaped docking Mode is docked, and good position is fixed with spot welding, is then led to argon gas and is protected；

（2）Bottoming welding, welding current 90A, voltage 12V, weldering speed about 0.8mm/s, completely two layers of weldering are carried out to welded specimen；

（3）It is filled weldering and cosmetic welding, welding current 100A, voltage 13V, weldering speed about 1.0mm/s.

Embodiment 3（Comparison）

Wlding in embodiment 1 is modified to the ERNiCr-3 welding wires of a diameter of φ 2.4mm, other conditions are constant.

Embodiment 4（Comparison）

Wlding in embodiment 2 is modified to the ERNiCr-3 welding wires of a diameter of φ 2.4mm, other conditions are constant.

Performance test

1, according to JB/T4730.5-2005, Liquid penetrant testing is carried out to face of weld（PT）

As a result it shows：The face of weld of embodiment 1-4 does not find the defects of crackle, stomata, undercut, meets JB/T4730.5- 2005 I grades of requirements.

2, according to JB/T4730.2-2005, ray detection is carried out to weld seam（RT）

As a result it shows：The weld seam of embodiment 1-4 does not find any defect, meets I grade of requirement of JB/T4730.2-2005.

3, according to GB/T228-2010, room temperature is carried out to sample sampling（25℃）Tensile property is tested

Test result is as shown in table 1.

1 room temperature tensile test result of table

Sample	Tensile strength	Fracture position
			Embodiment 1	620 MPa	Base material
Embodiment 2	585 MPa	Base material
			Embodiment 3	625 MPa	Base material
Embodiment 4	575 MPa	Base material

Above-mentioned test result shows that the sample of embodiment 1-4 is met the requirements of the standard.The welding material and ERNiCr-3 of the present invention The ambient temperature mechanical properties showed when being welded applied to ZG50Ni35Cr17 are roughly the same.

4, according to GB/T232-2010, to sample and side bend test test is carried out

As a result it shows：It does not find crackle, meets GB/T232-2010 requirements.

5, according to GB/T4338-2006《Metal Materials At High Temperature stretching test method》, to sample, carried out at 670 DEG C High temperature, short time Mechanics Performance Testing

Specific test process is as follows：Processed sample is required according to standard, sample is then fixed on WDE-300B high temperature with fixture block On universal testing machine, temperature is then increased to 667~673 DEG C；Temperature is kept, load is slowly increased, until sample fracture.

The intensity and fracture position loaded when record fracture, the results are shown in Table 2.

Table 2 is in 670 DEG C of extension test results

Sample	Tensile strength at 670 DEG C	Fracture position
			Embodiment 1	480 MPa	Base material
Embodiment 2	473 MPa	Base material
			Embodiment 3	410 MPa	Weld seam
Embodiment 4	400 MPa	Weld seam

From the results shown in Table 2, at 670 DEG C, use ERNiCr-3 for the sample of wlding 400MPa or so stretching Weld seam is just broken under power；And the sample of wlding disclosed by the invention is used, even if in the stretching masterpiece more than 450MPa Under, in the case where base material has been broken, weld seam is not also broken.Should the result shows that, the welding as ZG50Ni35Cr17 Material, welding material disclosed by the invention are far superior to ERNiCr-3 in terms of mechanical behavior under high temperature.

In summary, when being welded for ZG50Ni35Cr17, gained weld seam not only has good welding material of the invention Good surface topography and ambient temperature mechanical properties, and with the mechanical behavior under high temperature significantly improved.This can greatly promote production The quality of product, and application of the extension ZG50Ni35Cr17 products under various hot environments can be played to push well and made With.

Claims

1. a kind of welding material for ZG50Ni35Cr17.

2. the welding material according to claim 1 for ZG50Ni35Cr17, which is characterized in that by mass percentage Meter, is made of following chemical composition：C≤0.5%, Cr 16.0~18.0%, Fe 6.0~10.0%, Mn≤1.0%, Nb 1.5~ 3.0%, Si 0.6~1.0%, S≤0.015%, P≤0.015%, Ni >=70.0%.

3. the welding material according to claim 2 for ZG50Ni35Cr17, which is characterized in that by mass percentage Meter, is made of following chemical composition：C≤0.5%, Cr 16.0~17.0%, Fe 7.0~8.0 %, Mn≤0.7%, Nb 2.0~ 2.5%, Si 0.8~1.0%, S≤0.015%, P≤0.015%, Ni >=72.0%.

4. the welding material according to claim 3 for ZG50Ni35Cr17, which is characterized in that by mass percentage Meter, is made of following chemical composition：C 0.3%, Cr 16.8%, Fe 7.2%, Mn 0.4%, Nb 2.45%, Si 0.85%, S 0.002%, P 0.002%, Ni surplus.

5. purposes of the welding material in welding ZG50Ni35Cr17 described in any one of claim 1-4.

6. purposes according to claim 5, which is characterized in that adopted when carrying out ZG50Ni35Cr17 welding using welding material Welding procedure is selected from gas metal-arc welding, non-consumable gas shielded arc welding or automatic welding, it is preferred to use non-melt pole Gas shielded arc welding（GTAW）Technique.

7. purposes according to claim 5, which is characterized in that the ZG50Ni35Cr17 casting alloys.