CN108856976A - Hardfacing technique - Google Patents
Hardfacing technique Download PDFInfo
- Publication number
- CN108856976A CN108856976A CN201810949814.8A CN201810949814A CN108856976A CN 108856976 A CN108856976 A CN 108856976A CN 201810949814 A CN201810949814 A CN 201810949814A CN 108856976 A CN108856976 A CN 108856976A
- Authority
- CN
- China
- Prior art keywords
- welding
- pipeline
- preheating
- heap
- hardfacing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
- B23K9/044—Built-up welding on three-dimensional surfaces
- B23K9/046—Built-up welding on three-dimensional surfaces on surfaces of revolution
- B23K9/048—Built-up welding on three-dimensional surfaces on surfaces of revolution on cylindrical surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
Abstract
Hardfacing technique, it is related to a kind of welding procedure, it includes：One, welding preparation selects suitable welding rod and wear-resisting fusion welding metal；Two, the impurity to facing surface is removed, until exposing metallic luster；Three, heap weld preheating and layer temperature control system wrap up the pipeline circumferential direction of welding position before weldering, are evenly heated pipeline；Four, postheating must not be interrupted the pipeline continuous sequence after preheating, control pipe temperature always, and heap postwelding covers pipeline, keeps the temperature slow cooling, complete heap welding.The technique passes through repetition test, and adjusting process parameter avoids weld crack appearance by weld preheating, the measure of postheating.
Description
Technical field
The present invention relates to a kind of welding procedure, in particular to a kind of hardfacing technique.
Background technique
In the both ends build-up wear-resistant alloy of boiler product direct-contact desuperheater, direct-contact desuperheater screw and stack shell friction are prevented
Stack shell is damaged, the service life of direct-contact desuperheater is influenced, still, cracking is easy in existing welding process, such as Fig. 1 institute
Show, influence product quality, is unfavorable for the long-time service of direct-contact desuperheater.
Summary of the invention
The present invention is to overcome the shortcomings of the existing technology, provide a kind of hardfacing technique.The technique passes through repetition test, adjustment
Technological parameter avoids weld crack from occurring by weld preheating, the measure of postheating.
The technical scheme is that：
Hardfacing technique, including：
One, welding preparation selects suitable welding rod and wear-resisting fusion welding metal；
Two, the impurity to facing surface is removed, until exposing metallic luster；
Three, heap weld preheating and layer temperature control system wrap up the pipeline circumferential direction of welding position before weldering, are evenly heated pipe
Road is preheated to 250 DEG C or more；
Four, postheating must not be interrupted the pipeline continuous sequence after preheating, control pipe temperature always and be greater than 250
DEG C, heap postwelding covers pipeline, keeps the temperature slow cooling, completes heap welding.
Further, on Mayari 12Cr1MoVG, build-up wear-resistant fusion welding metal uses EDCrNi-A-15
(D547)。
The beneficial effects of the invention are as follows：Present invention process is simple, reliably, by weld preheating, the measure of postheating, keeps away
Exempt from weld crack appearance, through Liquid penetrant testing flawless, is effectively guaranteed welding quality, direct-contact desuperheater is made for a long time
With.
Detailed description of the invention
Fig. 1 is the schematic diagram that the product that existing welding manner obtains has larger crack site；
Fig. 2 is that bead-welding technology of the present invention obtains the schematic diagram at the not cracked position of product.
Specific embodiment
It is shown in Figure 2, hardfacing technique, including：
One, welding preparation selects suitable welding rod and wear-resisting fusion welding metal；
Two, the impurity to facing surface is removed, until exposing metallic luster；
Three, heap weld preheating and layer temperature control system wrap up the pipeline circumferential direction of welding position before weldering, are evenly heated pipe
Road is preheated to 250 DEG C or more；
Four, postheating must not be interrupted the pipeline continuous sequence after preheating, control pipe temperature always and be greater than 250
DEG C, heap postwelding covers pipeline, keeps the temperature slow cooling, completes built-up welding.
Heap welding preparation, in general, removing to facing surface water, rust, grease stain impurity.Resurfacing welding material uses capital thunder wlding specification
It is 4.0mm for outer diameter, the trade mark is the welding rod of GEH-547 (D547), and the welding material ingredient and performance meet GB/T984's
The standard requirements of EDCrNi-A-15.
Preferably, using electrical heating method before weldering, wrapped up using pipeline circumferential direction of the tracklayer heater to welding position.
Using far infrared temperature measurement instrument control preheating temperature to 250 DEG C or more, to ensure to be evenly heated pipeline.In general, using manual arc
Continuous sequence is welded, heap postwelding covers pipeline using ceramic fiber cotton, it is ensured that heat preservation slow cooling.
Embodiment 1
The present embodiment studies the build-up wear-resistant fusion welding metal EDCrNi-A-15 on Mayari 12Cr1MoVG
(D547) new process, Mayari 12Cr1MoVG pipe main chemical compositions (mass fraction, %), as follows：
C：0.08-0.15
Mn：0.40-0.70
Si：0.17-0.37
P：≤0.03
S：≤0.03
Cr：0.90-1.20
Mo：0.25-0.35
V：0.15-0.30
Cu：≤0.20
One, welding preparation, selecting the outer diameter of capital thunder wlding specification is 4.0mm, and the trade mark is the welding rod of GEH-547 (D547),
The welding material ingredient and performance meet the standard requirements of the EDCrNi-A-15 of GB/T984, and build-up wear-resistant fusion welding metal is
EDCrNi-A-15(D547)；
Two, it removes to impurity such as facing surface water, rust, grease stains, until exposing metallic luster；
Three, heap weld preheating and layer temperature control system wrap up welding position pipeline circumferential direction using electrical heating method before welding,
Even heating pipe, is preheated to 250-280 DEG C；
Four, postheating uses arc welding continuous sequence to the pipeline after preheating, and welding current 130-140A must not
Interruption controls 260-320 DEG C of pipe temperature always, and heap postwelding covers pipeline, keeps the temperature slow cooling, completes built-up welding.Obtained product weldering
Portion faces are connect through Liquid penetrant testing flawless, surface quality is good.
Embodiment 2
The present embodiment studies the build-up wear-resistant fusion welding metal EDCrNi-A-15 on Mayari 12Cr1MoVG
(D547) new process, Mayari 12Cr1MoVG pipe main chemical compositions (mass fraction, %), as follows：
C：0.08-0.15
Mn：0.40-0.70
Si：0.17-0.37
P：≤0.03
S：≤0.03
Cr：0.90-1.20
Mo：0.25-0.35
V：0.15-0.30
Cu：≤0.20
One, welding preparation, selecting the outer diameter of capital thunder wlding specification is 4.0mm, and the trade mark is the welding rod of GEH-547 (D547),
The welding material ingredient and performance meet the standard requirements of the EDCrNi-A-15 of GB/T984, and build-up wear-resistant fusion welding metal is
EDCrNi-A-15(D547)；
Two, it removes to impurity such as facing surface water, rust, grease stains, until exposing metallic luster；
Three, heap weld preheating and layer temperature control system wrap up welding position pipeline circumferential direction before weldering, are evenly heated pipeline,
Using far infrared temperature measurement instrument detection preheating temperature to 250 DEG C or more；
Four, postheating uses arc welding continuous sequence to the pipeline after preheating, and welding current 120-130A must not
Interruption, controlling pipe temperature always is 350-380 DEG C, and heap postwelding covers pipeline using ceramic fiber cotton, keeps the temperature slow cooling, completes heap
Weldering.For obtained Product jointing portion faces through Liquid penetrant testing flawless, surface quality is good.
Embodiment 3
The present embodiment studies the build-up wear-resistant fusion welding metal EDCrNi-A-15 on Mayari 12Cr1MoVG
(D547) new process, Mayari 12Cr1MoVG pipe main chemical compositions (mass fraction, %), as follows：
C：0.08-0.15
Mn：0.40-0.70
Si：0.17-0.37
P：≤0.03
S：≤0.03
Cr：0.90-1.20
Mo：0.25-0.35
V：0.15-0.30
Cu：≤0.20
One, welding preparation, selecting the outer diameter of capital thunder wlding specification is 4.0mm, and the trade mark is the welding rod of GEH-547 (D547),
The welding material ingredient and performance meet the standard requirements of the EDCrNi-A-15 of GB/T984, and build-up wear-resistant fusion welding metal is
EDCrNi-A-15(D547)；
Two, it removes to impurity such as facing surface water, rust, grease stains, until exposing metallic luster；
Three, heap weld preheating and layer temperature control system use electrical heating method before weldering, with tracklayer heater to welding position pipeline
Circumferential direction is wrapped up, and pipeline is evenly heated, using far infrared temperature measurement instrument detection preheating temperature to 280-300 DEG C；
Four, postheating uses arc welding continuous sequence to the pipeline after preheating, and welding current 130-160A must not
Interruption controls 330-350 DEG C of pipe temperature always, and heap postwelding covers pipeline using ceramic fiber cotton, keeps the temperature slow cooling, completes heap
Weldering.For obtained Product jointing portion faces through Liquid penetrant testing flawless, surface quality is good.
Claims (8)
1. hardfacing technique, it is characterised in that：It includes：
One, welding preparation selects suitable welding rod and wear-resisting fusion welding metal；
Two, the impurity to facing surface is removed, until exposing metallic luster；
Three, heap weld preheating and layer temperature control system wrap up the pipeline circumferential direction of welding position before weldering, are evenly heated pipeline, in advance
Heat is to 250 DEG C or more；
Four, postheating must not be interrupted the pipeline continuous sequence after preheating, control pipe temperature always and be greater than 250 DEG C, heap
Postwelding covers pipeline, keeps the temperature slow cooling, completes built-up welding.
2. hardfacing technique according to claim 1, it is characterised in that：Using tracklayer heater to welding position before weldering
Pipeline circumferential direction wrapped up.
3. hardfacing technique according to claim 2, it is characterised in that：Extremely using far infrared temperature measurement instrument control preheating temperature
250 DEG C or more.
4. according to claim 1, the 2 or 3 hardfacing technique, it is characterised in that：Using manual electric arc welding continuous sequence.
5. hardfacing technique according to claim 4, it is characterised in that：Welding current is 120-160A.
6. hardfacing technique according to claim 5, it is characterised in that：It for outer diameter is 4.0mm, the trade mark that welding rod, which uses specification,
For the welding rod of GEH-547.
7. hardfacing technique according to claim 6, it is characterised in that：It removes to facing surface water, rust, grease stain impurity.
8. hardfacing technique according to claim 7, it is characterised in that：Heap postwelding covers pipeline using ceramic fiber cotton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810949814.8A CN108856976A (en) | 2018-08-20 | 2018-08-20 | Hardfacing technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810949814.8A CN108856976A (en) | 2018-08-20 | 2018-08-20 | Hardfacing technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108856976A true CN108856976A (en) | 2018-11-23 |
Family
ID=64321267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810949814.8A Pending CN108856976A (en) | 2018-08-20 | 2018-08-20 | Hardfacing technique |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103418923A (en) * | 2013-08-30 | 2013-12-04 | 北京工业大学 | Overlaying repair method for worn roller |
| CN104227180A (en) * | 2014-09-23 | 2014-12-24 | 重庆舸海机电有限公司 | Welding method for NM400 wear-resistant steel |
| CN105710499A (en) * | 2014-12-03 | 2016-06-29 | 重庆远煌机械制造有限公司 | Build-up welding technique |
| CN105710570A (en) * | 2014-12-03 | 2016-06-29 | 重庆远煌机械制造有限公司 | Build-up welding technique |
| CN105750691A (en) * | 2014-12-15 | 2016-07-13 | 重庆迅升机车配件有限公司 | Single toothed-roller bead-welding repairing technology |
| CN107052701A (en) * | 2017-03-31 | 2017-08-18 | 安徽再制造工程设计中心有限公司 | A kind of roll overlaying technique |
| KR20180037400A (en) * | 2016-10-04 | 2018-04-12 | (주)에스앤디 | A Automatic Overlay Welding Apparatus of Long Pipe |
-
2018
- 2018-08-20 CN CN201810949814.8A patent/CN108856976A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103418923A (en) * | 2013-08-30 | 2013-12-04 | 北京工业大学 | Overlaying repair method for worn roller |
| CN104227180A (en) * | 2014-09-23 | 2014-12-24 | 重庆舸海机电有限公司 | Welding method for NM400 wear-resistant steel |
| CN105710499A (en) * | 2014-12-03 | 2016-06-29 | 重庆远煌机械制造有限公司 | Build-up welding technique |
| CN105710570A (en) * | 2014-12-03 | 2016-06-29 | 重庆远煌机械制造有限公司 | Build-up welding technique |
| CN105750691A (en) * | 2014-12-15 | 2016-07-13 | 重庆迅升机车配件有限公司 | Single toothed-roller bead-welding repairing technology |
| KR20180037400A (en) * | 2016-10-04 | 2018-04-12 | (주)에스앤디 | A Automatic Overlay Welding Apparatus of Long Pipe |
| CN107052701A (en) * | 2017-03-31 | 2017-08-18 | 安徽再制造工程设计中心有限公司 | A kind of roll overlaying technique |
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Application publication date: 20181123 |