CN105834553A - Build-up welding machining technology of valve part - Google Patents
Build-up welding machining technology of valve part Download PDFInfo
- Publication number
- CN105834553A CN105834553A CN201610321226.0A CN201610321226A CN105834553A CN 105834553 A CN105834553 A CN 105834553A CN 201610321226 A CN201610321226 A CN 201610321226A CN 105834553 A CN105834553 A CN 105834553A
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- CN
- China
- Prior art keywords
- welding
- built
- build
- roughing part
- roughing
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- 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
-
- 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
-
- 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
- B23P15/001—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings
Abstract
The invention relates to a build-up welding machining technology of a valve part. The technology comprises the following steps that 1, pre-welding treatment is carried out; 2, build-up welding machining is carried out, wherein a), a part machined roughly is placed on a platform, build-up welding is carried out on the part by means of manual operation, and a protecting layer is welded to the part machined roughly; b), a turning lathe is utilized for flatly turning the protecting layer on the part machined roughly and polishing the protecting layer smoothly; c, a transition layer is welded to the protecting layer of the part machined roughly in a build-up manner by means of manual operation, and the turning lathe is utilized for turning the transition layer flatly and polishing the transition layer smoothly; d), preheating is carried out on the part machined roughly; and e), welding rods are welded to an orifice and edge portions in the part machined roughly by means of manual build-up welding, then an argon arc welding machine is utilized, build-up welding is carried out on the part machined roughly according to set technological parameters, and a build-up weld layer is welded to the part machined roughly in a build-up manner; and 3, post-weld treatment is carried out. By means of the three steps of pre-welding treatment, build-up welding machining and post-weld treatment, the whole build-up welding machining technology is monitored and managed strictly, and the build-up welding effect is ensured.
Description
Technical field
The invention belongs to field of welding processing, particularly relate to the built-up welding processing technique of a kind of valve part.
Background technology
Built-up welding is quick process as a kind of economic of material surface modifying, is applied to more and more widely during the manufacture of each industrial department part repairs.Valve is the product that a kind of range is wider; valve part quantity therein and total class are various; existing valve part mostly needs that it is carried out built-up welding one layer stack layer and protects; but find in the actual course of processing; if directly built-up welding one layer stack layer, its built-up welding weak effect on roughing part, be so easily caused the defective of later stage valve part; reduce the qualification rate of valve part, it is impossible to meet process requirements.
Summary of the invention
The invention aims to overcome the deficiencies in the prior art to provide the built-up welding processing technique of the valve part that a kind of built-up welding qualification rate is high.
For reaching above-mentioned purpose, the technical solution used in the present invention is: the built-up welding processing technique of a kind of valve part, comprises the steps:
One, pre-welding treatment:
A) water on the welding surface of roughing part, rust, greasy dirt and oxide skin are cleaned out；
B) facing surface 100%UT and 100%PT is checked, it is ensured that facing surface and near surface are without any visual defects；
C) roughing part is carried out dimension control, and retain dimensional check record；
D) by welding rod drying, then the welding rod after drying is placed in the couveuse of 100-150 °；
Two, built-up welding processing:
A) first, being placed on platform by roughing part, manual operations carries out built-up welding to roughing part, welds layer protective layer on roughing part；
B) utilize lathe to be put down by the protective layer car on roughing part, polish smooth；
C) continue manual operations one layer of transition zone of built-up welding again on the protective layer of roughing part, and utilize lathe to be put down by transition zone car, polish smooth；
D) roughing part is preheated；
E) welding rod is welded to the aperture in roughing part and property at parts of edges and corners by manual build up welding, then roughing part and welding rod are placed on argon arc welding machine, and according to the technological parameter set, roughing part is carried out built-up welding, built-up welding one layer stack layer on roughing part；
Three, after welding treatment:
A) overlay cladding thickness is tested, it is ensured that disclosure satisfy that processing request, overlay surface PMI is tested simultaneously, it is to avoid flow into next procedure cause unnecessary doing over again due to overlay cladding thickness deficiency and off analysis；
B) the roughing part of heap postwelding is carried out post weld heat treatment；
C) the roughing part of heap postwelding is carried out hydraulic pressure test.
Preferably, the material of described welding rod is made up of C, SI, Mn, P, S, Cr, Ni, Mo and Cu mixing.
Preferably, preheating temperature >=100 DEG C of roughing part.
Preferably, the thickness >=3mm of described overlay cladding.
Preferably, described protective layer and the thickness≤1mm of transition zone.
Due to the utilization of technique scheme, the present invention compared with prior art has the advantage that
The built-up welding processing technique of the valve part of the present invention program; it has carried out strict monitoring and management by pre-welding treatment, built-up welding processing and three steps of after welding treatment to whole built-up welding processing technique; simultaneously built-up welding many to roughing part protective layer and transition zone in built-up welding; it is thus possible to the welding effect ensured between overlay cladding and roughing part is good; ensure that the qualification rate of finished product, meet the demand of processing.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail.
The built-up welding processing technique of a kind of valve part of the present invention, comprises the steps:
One, pre-welding treatment:
A) water on the welding surface of roughing part, rust, greasy dirt and oxide skin are cleaned out；
B) facing surface 100%UT and 100%PT is checked, it is ensured that facing surface and near surface are without any visual defects；
C) roughing part is carried out dimension control, and retain dimensional check record；
D) by welding rod drying, then the welding rod after drying is placed in the couveuse of 100-150 °；
Two, built-up welding processing:
A) first, being placed on platform by roughing part, manual operations carries out built-up welding to roughing part, welds layer protective layer on roughing part；
B) utilize lathe to be put down by the protective layer car on roughing part, polish smooth；
C) continue manual operations one layer of transition zone of built-up welding again on the protective layer of roughing part, and utilize lathe to be put down by transition zone car, polish smooth；
D) roughing part is preheated；
E) welding rod is welded to the aperture in roughing part and property at parts of edges and corners by manual build up welding, then roughing part and welding rod are placed on argon arc welding machine, and according to the technological parameter set, roughing part is carried out built-up welding, built-up welding one layer stack layer on roughing part；
Three, after welding treatment:
A) overlay cladding thickness is tested, it is ensured that disclosure satisfy that processing request, overlay surface PMI is tested simultaneously, it is to avoid flow into next procedure cause unnecessary doing over again due to overlay cladding thickness deficiency and off analysis；
B) the roughing part of heap postwelding is carried out post weld heat treatment；
C) the roughing part of heap postwelding is carried out hydraulic pressure test.
The material of described welding rod is made up of C, SI, Mn, P, S, Cr, Ni, Mo and Cu mixing；Preheating temperature >=100 DEG C of roughing part；Thickness >=the 3mm of described overlay cladding；Described protective layer and the thickness≤1mm of transition zone.
When welding rod is dried, forbid putting suddenly in high temperature furnace welding rod into, or from high temperature furnace, take out suddenly cooling, thus prevent welding rod from producing coating cracking decortication phenomenon because of suddenly cold and hot；When drying welding rod, welding rod should not become to chop or bundled ground is stacked, and should be paved into stratiform, and every layer of welding rod stacking can not be the thickest, it is to avoid inequality of being heated when drying welding rod and moisture are difficult to get rid of.
If welding rod is acidic electrode, then need acidic electrode is dried at a temperature of 150-200 DEG C 1-2 hour.
The material of welding rod ensure that overlay cladding wearability and steadiness.
The built-up welding processing technique of the valve part of the present invention; it has carried out strict monitoring and management by pre-welding treatment, built-up welding processing and three steps of after welding treatment to whole built-up welding processing technique; simultaneously built-up welding many to roughing part protective layer and transition zone in built-up welding; it is thus possible to the welding effect ensured between overlay cladding and roughing part is good; ensure that the qualification rate of finished product, meet the demand of processing.
Below it is only the concrete exemplary applications of the present invention, protection scope of the present invention is not constituted any limitation.The technical scheme that all employing equivalents or equivalence are replaced and formed, within the scope of all falling within rights protection of the present invention.
Claims (5)
1. the built-up welding processing technique of a valve part, it is characterised in that: comprise the steps:
One, pre-welding treatment:
A) water on the welding surface of roughing part, rust, greasy dirt and oxide skin are cleaned out；
B) facing surface 100%UT and 100%PT is checked, it is ensured that facing surface and near surface are without any visual defects；
C) roughing part is carried out dimension control, and retain dimensional check record；
D) by welding rod drying, then the welding rod after drying is placed in the couveuse of 100-150 °；
Two, built-up welding processing:
A) first, being placed on platform by roughing part, manual operations carries out built-up welding to roughing part, welds layer protective layer on roughing part；
B) utilize lathe to be put down by the protective layer car on roughing part, polish smooth；
C) continue manual operations one layer of transition zone of built-up welding again on the protective layer of roughing part, and utilize lathe to be put down by transition zone car, polish smooth；
D) roughing part is preheated；
E) welding rod is welded to the aperture in roughing part and property at parts of edges and corners by manual build up welding, then roughing part and welding rod are placed on argon arc welding machine, and according to the technological parameter set, roughing part is carried out built-up welding, built-up welding one layer stack layer on roughing part；
Three, after welding treatment:
A) overlay cladding thickness is tested, it is ensured that disclosure satisfy that processing request, overlay surface PMI is tested simultaneously, it is to avoid flow into next procedure cause unnecessary doing over again due to overlay cladding thickness deficiency and off analysis；
B) the roughing part of heap postwelding is carried out post weld heat treatment；
C) the roughing part of heap postwelding is carried out hydraulic pressure test.
2. according to the built-up welding processing technique of the valve part described in claim 1, it is characterised in that: the material of described welding rod is made up of C, SI, Mn, P, S, Cr, Ni, Mo and Cu mixing.
The built-up welding processing technique of valve part the most according to claim 1, it is characterised in that: preheating temperature >=100 DEG C of roughing part.
The built-up welding processing technique of valve part the most according to claim 1, it is characterised in that: the thickness >=3mm of described overlay cladding.
The built-up welding processing technique of valve part the most according to claim 1, it is characterised in that: described protective layer and the thickness≤1mm of transition zone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610321226.0A CN105834553A (en) | 2016-05-16 | 2016-05-16 | Build-up welding machining technology of valve part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610321226.0A CN105834553A (en) | 2016-05-16 | 2016-05-16 | Build-up welding machining technology of valve part |
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| Publication Number | Publication Date |
|---|---|
| CN105834553A true CN105834553A (en) | 2016-08-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201610321226.0A Pending CN105834553A (en) | 2016-05-16 | 2016-05-16 | Build-up welding machining technology of valve part |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109590669A (en) * | 2019-02-16 | 2019-04-09 | 四川亚西机器有限公司 | A kind of alloy welding deposit technique |
| CN111872633A (en) * | 2020-07-14 | 2020-11-03 | 苏州市鑫渭阀门有限公司 | Valve and shaft surface regeneration strengthening process |
| CN113523647A (en) * | 2021-07-30 | 2021-10-22 | 浙江工业职业技术学院 | Preparation method and system of copper alloy welding wire and sealing structure |
| CN115008138A (en) * | 2022-06-28 | 2022-09-06 | 江苏华之益机械有限公司 | Surfacing machining process for valve component |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5826336A (en) * | 1994-08-23 | 1998-10-27 | Johnson Service Company | Process for the production of series-produced valves used in heating, ventilating and air-conditioning systems |
| JP2000301335A (en) * | 1999-04-21 | 2000-10-31 | Uchida Koki Kk | Build-up repair method by field welding of pressure- resistant surface of die of metal press or the like |
| CN101181764A (en) * | 2007-12-12 | 2008-05-21 | 湖南珠华机械有限公司 | Build-up welding process for low-alloy cast iron valve body sealing surface |
| CN103934544A (en) * | 2014-04-18 | 2014-07-23 | 沈阳大学 | Method for preventing overlaying sealing surface from cracking |
| CN104384658A (en) * | 2014-09-11 | 2015-03-04 | 芜湖市金贸流体科技股份有限公司 | Sealing surface machining method of cast steel valve body |
| CN104534165A (en) * | 2014-11-25 | 2015-04-22 | 南通龙源电站阀门有限公司 | Valve seat face surfacing technology |
-
2016
- 2016-05-16 CN CN201610321226.0A patent/CN105834553A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5826336A (en) * | 1994-08-23 | 1998-10-27 | Johnson Service Company | Process for the production of series-produced valves used in heating, ventilating and air-conditioning systems |
| JP2000301335A (en) * | 1999-04-21 | 2000-10-31 | Uchida Koki Kk | Build-up repair method by field welding of pressure- resistant surface of die of metal press or the like |
| CN101181764A (en) * | 2007-12-12 | 2008-05-21 | 湖南珠华机械有限公司 | Build-up welding process for low-alloy cast iron valve body sealing surface |
| CN103934544A (en) * | 2014-04-18 | 2014-07-23 | 沈阳大学 | Method for preventing overlaying sealing surface from cracking |
| CN104384658A (en) * | 2014-09-11 | 2015-03-04 | 芜湖市金贸流体科技股份有限公司 | Sealing surface machining method of cast steel valve body |
| CN104534165A (en) * | 2014-11-25 | 2015-04-22 | 南通龙源电站阀门有限公司 | Valve seat face surfacing technology |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109590669A (en) * | 2019-02-16 | 2019-04-09 | 四川亚西机器有限公司 | A kind of alloy welding deposit technique |
| CN111872633A (en) * | 2020-07-14 | 2020-11-03 | 苏州市鑫渭阀门有限公司 | Valve and shaft surface regeneration strengthening process |
| CN113523647A (en) * | 2021-07-30 | 2021-10-22 | 浙江工业职业技术学院 | Preparation method and system of copper alloy welding wire and sealing structure |
| CN115008138A (en) * | 2022-06-28 | 2022-09-06 | 江苏华之益机械有限公司 | Surfacing machining process for valve component |
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Application publication date: 20160810 |