CN110303297A - CrMoV steel-casting reprocesses repair method - Google Patents
CrMoV steel-casting reprocesses repair method Download PDFInfo
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- CN110303297A CN110303297A CN201910587224.XA CN201910587224A CN110303297A CN 110303297 A CN110303297 A CN 110303297A CN 201910587224 A CN201910587224 A CN 201910587224A CN 110303297 A CN110303297 A CN 110303297A
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- casting
- crmov steel
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- crmov
- steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
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- Mechanical Engineering (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The invention discloses a kind of CrMoV steel-castings to reprocess repair method, comprising the following steps: (1) defect for removing defect detecting test discovery in CrMoV steel-casting is dug with carbon, (2) polish pit digging to exposing metallic luster；(3) magnetic particle inspection is carried out to soldering region, it is ensured that the defects of the region has removed；(4) CrMoV steel-casting is integrally preheating to 300 DEG C or more before welding；(5) at 200-250 DEG C, welding current control carries out layering repair welding in 140-170A for weld interpass temperature control；(6) postwelding de-stress processing is carried out by the postwelding de-stress technique of the material immediately after the soldering of CrMoV steel-casting.Above-mentioned technical proposal is the operating method formulated according to the characteristic of CrMoV material, effectively prevent the generation of the Dangerous defects such as crackle and stomata, to guarantee the mechanical performance after welding, reduction, which is repaired, is welded into this.
Description
Technical field
The present invention relates to CrMoV steel-casting preparation technical fields, and in particular to a kind of CrMoV steel-casting reprocesses soldering side
Method.
Background technique
Chrominm-molybdenum-vanadium steel is that a kind of medium temperature or high temperature pearlitic heat-resisting cast steel, such low-alloy steel have higher creep rupture strength
And thermostrength, but welding performance is poor, is easy to appear crackle, and manufacturing operation trouble repairs that weldering is at high cost, the practicability is poor.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of CrMoV steel-casting to reprocess soldering side
Method, this method are the operating methods formulated according to the characteristic of CrMoV material, effectively prevent the Dangerous defects such as crackle and stomata
It generates, to guarantee the mechanical performance after welding, reduction, which is repaired, is welded into this.
To achieve the above object, the present invention provides the following technical scheme that a kind of CrMoV steel-casting reprocesses repair method,
The following steps are included:
(1) defect for removing defect detecting test discovery in CrMoV steel-casting is dug with carbon,
(2) polishing pit digging is to exposing metallic luster；
(3) magnetic particle inspection is carried out to soldering region, it is ensured that the defects of the region has removed；
(4) CrMoV steel-casting is integrally preheating to 300 DEG C or more before welding；
(5) at 200-250 DEG C, welding current control carries out layering repair welding in 140-170A for weld interpass temperature control；
(6) it is carried out at postwelding de-stress by the postwelding de-stress technique of the material immediately after the soldering of CrMoV steel-casting
Reason.
As preferred: step (4), the inner cavity soldering of CrMoV steel-casting can reduce ontology preheating temperature to 50 DEG C or more,
Outside carries out being locally heated to 80 DEG C or more at soldering, is covered around heating expansion to soldering region 200mm with heat-insulating material
CrMoV steel-casting prevents welding region peripheral temperature rapid drawdown.
As preferred: step (5), control hierarchy repair welding thickness, every thickness degree≤3mm.
As preferred: step (5) controls interlayer temperature at 200 DEG C -350 DEG C in the whole welding process.
As preferred: step (5), temperature measuring point are recorded away from welding point >=75mm.
As preferred: step (5) carries out thermometric inspection with temperature-measuring gun at any time.
The invention has the advantages that compared with prior art, the present invention is the operation side formulated according to the characteristic of CrMoV material
Method, effectively prevent the generation of the Dangerous defects such as crackle and stomata, to guarantee the mechanical performance after welding, reduction, which is repaired, to be welded into
This.
Below with reference to specification specific embodiment, the invention will be further described.
Specific embodiment
A kind of CrMoV steel-casting disclosed by the invention reprocesses repair method, comprising the following steps:
(1) defect for removing defect detecting test discovery in CrMoV steel-casting is dug with carbon,
(2) polishing pit digging is to exposing metallic luster；
(3) magnetic particle inspection is carried out to soldering region, it is ensured that the defects of the region has removed；
(4) CrMoV steel-casting is integrally preheating to 300 DEG C or more before welding；
(5) at 200-250 DEG C, welding current control carries out layering repair welding in 140-170A for weld interpass temperature control；
(6) it is carried out at postwelding de-stress by the postwelding de-stress technique of the material immediately after the soldering of CrMoV steel-casting
Reason.
As preferred: step (4), the inner cavity soldering of CrMoV steel-casting can reduce ontology preheating temperature to 50 DEG C or more,
Outside carries out being locally heated to 80 DEG C or more at soldering, is covered around heating expansion to soldering region 200mm with heat-insulating material
CrMoV steel-casting prevents welding region peripheral temperature rapid drawdown.
As preferred: step (5), control hierarchy repair welding thickness, every thickness degree≤3mm.
As preferred: step (5) controls interlayer temperature at 200 DEG C -350 DEG C in the whole welding process.
As preferred: step (5), temperature measuring point are recorded away from welding point >=75mm.
As preferred: step (5) carries out thermometric inspection with temperature-measuring gun at any time.
The present invention is the operating method formulated according to the characteristic of CrMoV material, effectively prevent the harmfulness such as crackle and stomata
The generation of defect, to guarantee the mechanical performance after welding, reduction, which is repaired, is welded into this.
Above-described embodiment is served only for that invention is further explained to specific descriptions of the invention, should not be understood as
Limiting the scope of the present invention, the technician of this field make the present invention according to the content of foregoing invention some non-
The modifications and adaptations of essence are fallen within the scope of protection of the present invention.
Claims (6)
1. a kind of CrMoV steel-casting reprocesses repair method, it is characterised in that: the following steps are included:
(1) defect for removing defect detecting test discovery in CrMoV steel-casting is dug with carbon,
(2) polishing pit digging is to exposing metallic luster；
(3) magnetic particle inspection is carried out to soldering region, it is ensured that the defects of the region has removed；
(4) CrMoV steel-casting is integrally preheating to 300 DEG C or more before welding；
(5) at 200-250 DEG C, welding current control carries out layering repair welding in 140-170A for weld interpass temperature control；
(6) postwelding de-stress processing is carried out by the postwelding de-stress technique of the material immediately after the soldering of CrMoV steel-casting.
2. a kind of CrMoV steel-casting according to claim 1 reprocesses repair method, it is characterised in that: step (4), CrMoV
The soldering of steel-casting inner cavity can reduce ontology preheating temperature to 50 DEG C or more, at soldering outside be locally heated to 80 DEG C with
On, CrMoV steel-casting is covered with heat-insulating material around heating expansion to soldering region 200mm, prevents welding region peripheral temperature
Rapid drawdown.
3. a kind of CrMoV steel-casting according to claim 1 reprocesses repair method, it is characterised in that: step (5), control
It is layered repair welding thickness, every thickness degree≤3mm.
4. a kind of CrMoV steel-casting according to claim 1 reprocesses repair method, it is characterised in that: step (5), whole
Interlayer temperature is controlled in a welding process at 200 DEG C -350 DEG C.
5. a kind of CrMoV steel-casting according to claim 1 reprocesses repair method, it is characterised in that: step (5), thermometric
Point is recorded away from welding point >=75mm.
6. a kind of CrMoV steel-casting according to claim 1 reprocesses repair method, it is characterised in that: step (5), at any time
Thermometric inspection is carried out with temperature-measuring gun.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910587224.XA CN110303297A (en) | 2019-07-02 | 2019-07-02 | CrMoV steel-casting reprocesses repair method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910587224.XA CN110303297A (en) | 2019-07-02 | 2019-07-02 | CrMoV steel-casting reprocesses repair method |
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| CN110303297A true CN110303297A (en) | 2019-10-08 |
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| CN201910587224.XA Pending CN110303297A (en) | 2019-07-02 | 2019-07-02 | CrMoV steel-casting reprocesses repair method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114453825A (en) * | 2022-01-27 | 2022-05-10 | 安徽应流铸业有限公司 | Welding repair method for defects of low-alloy high-strength steel casting |
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| CN101104234A (en) * | 2007-08-10 | 2008-01-16 | 四川东风电机厂有限公司 | Water wheel generating set cast steel part defect repair welding crackle processing method |
| CN101862926A (en) * | 2010-06-21 | 2010-10-20 | 西安理工大学 | Welding material for quickly welding and repairing defects of large-scale steel-casting and repairing method |
| CN103769728A (en) * | 2014-03-04 | 2014-05-07 | 江苏万恒铸业有限公司 | Process for repair-welding steel casting through flux-cored wire CO2 gas shielded welding |
| CN104439876A (en) * | 2014-09-29 | 2015-03-25 | 宁夏共享铸钢有限公司 | Method for repairing defects of pipe orifice of high-alloy hollow valve shell casting |
| CN105014200A (en) * | 2015-07-31 | 2015-11-04 | 共享铸钢有限公司 | Steel casting loose defect welding method |
| CN105945437A (en) * | 2016-05-31 | 2016-09-21 | 共享铸钢有限公司 | Defect repair method of low-alloy steel casting after finishing |
| UA124460U (en) * | 2017-11-02 | 2018-04-10 | Українська Інженерно-Педагогічна Академія | FLUX FOR GAS WELDING OF IRON |
| CN108856945A (en) * | 2018-06-28 | 2018-11-23 | 共享铸钢有限公司 | A kind of welding repair method of heat resisting steel material casting |
-
2019
- 2019-07-02 CN CN201910587224.XA patent/CN110303297A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101104234A (en) * | 2007-08-10 | 2008-01-16 | 四川东风电机厂有限公司 | Water wheel generating set cast steel part defect repair welding crackle processing method |
| CN101862926A (en) * | 2010-06-21 | 2010-10-20 | 西安理工大学 | Welding material for quickly welding and repairing defects of large-scale steel-casting and repairing method |
| CN103769728A (en) * | 2014-03-04 | 2014-05-07 | 江苏万恒铸业有限公司 | Process for repair-welding steel casting through flux-cored wire CO2 gas shielded welding |
| CN104439876A (en) * | 2014-09-29 | 2015-03-25 | 宁夏共享铸钢有限公司 | Method for repairing defects of pipe orifice of high-alloy hollow valve shell casting |
| CN105014200A (en) * | 2015-07-31 | 2015-11-04 | 共享铸钢有限公司 | Steel casting loose defect welding method |
| CN105945437A (en) * | 2016-05-31 | 2016-09-21 | 共享铸钢有限公司 | Defect repair method of low-alloy steel casting after finishing |
| UA124460U (en) * | 2017-11-02 | 2018-04-10 | Українська Інженерно-Педагогічна Академія | FLUX FOR GAS WELDING OF IRON |
| CN108856945A (en) * | 2018-06-28 | 2018-11-23 | 共享铸钢有限公司 | A kind of welding repair method of heat resisting steel material casting |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114453825A (en) * | 2022-01-27 | 2022-05-10 | 安徽应流铸业有限公司 | Welding repair method for defects of low-alloy high-strength steel casting |
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Application publication date: 20191008 |
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