CN104816093B - Manufacturing method for deep hole bottom sealing surface laser cladding of valve body part - Google Patents
Manufacturing method for deep hole bottom sealing surface laser cladding of valve body part Download PDFInfo
- Publication number
- CN104816093B CN104816093B CN201510261005.4A CN201510261005A CN104816093B CN 104816093 B CN104816093 B CN 104816093B CN 201510261005 A CN201510261005 A CN 201510261005A CN 104816093 B CN104816093 B CN 104816093B
- Authority
- CN
- China
- Prior art keywords
- valve body
- sealing surface
- deep hole
- melting coating
- laser
- 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.)
- Expired - Fee Related
Links
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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/12—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure
- B23K26/123—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure in an atmosphere of particular gases
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a manufacturing method for deep hole bottom sealing surface surfacing of a valve part based on a laser cladding technology. A counter bore is processed at the bottom of a deep hole of a valve body, the pore diameter and the height of the counter bore are the design dimensions of the surfacing alloy sealing surface of the valve part; valve body blank is preheated in a heat treatment furnace prior to the laser cladding; alloy powder is pre-arranged at the position of the counter bore at the bottom of the valve body after the preheating of the valve body, and the laser cladding starts after protective gas is led in the deep hole of the valve body for 2-3 minutes; a laser scanning track of the laser cladding is spiral, the laser stopping position of the laser cladding is at the non-sealing surface, and crater cracks on the sealing surface are avoided. When multilayer laser cladding is needed, a laser scanning track starting point of a front layer and a laser scanning track starting point of a rear layer are not overlapped and need to differ by 45-90 degrees, and the rest can be done in the same manner when the number of surfacing layers is increased. The manufacturing method has simpler valve deep hole bottom sealing surface preparation performance and more efficient production efficiency.
Description
Technical field
The present invention relates to a kind of valve body piece sealing surface deep hole overlaying method, adopt laser melting coating valve body particularly to a kind of
The manufacture method of sealing surface.
Background technology
The built-up welding of valve body piece deep hole bottom sealing surface is always a difficult problem for valve body manufacturing enterprise.At present, domestic big absolutely portion
Valve body manufacturing enterprise is divided all to carry out artificial manual metal-arc welding welding using welding rod, the main problem existing has: 1) enters using welding rod
Row manual arc deep hole built-up welding, the in the hole of deep hole is full of smog, and welder cannot observe appearance of weld, leans on the feel of welder completely
, often the bad defect of molding in operation, and the implementation procedure of welding procedure is difficult；2) adopt welding rod manual arc deep hole built-up welding, by
In welding rod limited length and can not continuously built-up welding, welding stop position crater crack often occurs, and due to operation sight line poor
And cannot repair welding, lead to the welding quality of deep hole bottom overlay cladding deep hole built-up welding cannot ensure at all；3) adopt manual arc deep
Hole built-up welding, the welding slag cleaning of electrode coating is difficult, dreg defect often；4) for above-mentioned reasons, manual arc deep hole built-up welding
Often occur that molding is bad, the defect such as crackle, slag inclusion, lead to welding quality unstable, cause the qualification rate of product very low.Valve system
Make enterprise for reduces cost, carry out multiple repair welding after underproof for built-up welding product is re-worked, lead to the valve body of sealing surface
The penalty of matrix, this multiple repair welding can leave potential safety hazard.In recent years, scientific and technical personnel have carried out deep hole bottom heap
The technological improvement of weldering, a kind of such as patent " overlay welding process for deep holes on valve body sealing surface " (number of patent application: 201110380548.x) is adopted
Used in body base processing technique hole, using air-introduced machine, welding fume is emptied, this patented technology can mitigate cigarette in welding process
The visual difference problem that mist leads to.Patent " wb36 valve body sealing surface welding procedure " proposes two steps using built-up welding toughness transition zone
The valve body sealing surface bead-welding technology of method, i.e. transition zone turnery processing, compared with the transition zone of soft, is then become plane by first built-up welding, then
Built-up welding hard sealing surface, this patented technology can mitigate the crack problem of sealing surface weld deposit hard alloy.By literature search, although
Deep hole heap is welded with some technological improvements, but because technology or technique reason itself also have limitation, all can not be fully solved
State manual arc deep hole built-up welding problem.
Therefore, those skilled in the art is devoted to developing a kind of deep hole sealing surface manufacture with eased preparative
Method.
Content of the invention
In view of the problems referred to above of prior art, the purpose of the present invention is to overcome deficiency of the prior art, proposes a kind of
Using the valve partses deep hole sealing surface weld deposit manufacture method of laser melting and coating technique, there is the deep hole sealing of eased preparative
Face manufacture method, solves the valve body piece deep hole sealing surface weld deposit poor, welding procedure such as crackle, slag inclusion of visuality and welding quality
Unstable problem.
For achieving the above object, the invention provides a kind of system of valve body piece deep hole bottom sealing surface laser melting coating
Make method, including, deep hole processing on valve body, process counterbore in deep hole bottom, in the preset alloyed powder in body base counterbore position
End, and it is passed through beginning laser melting coating after protective gas to valve body deep hole, the scanning track of the laser beam of laser melting coating is spiral type,
The stop position of laser melting coating is in non-tight face, it is to avoid crater crack occurs in sealing surface.
Further, the aperture of counterbore is equal to the design size of valve hardfacing alloy sealing surface.
Further, before laser melting coating, valve body needs to be preheated in heat-treatment furnace, after valve body completes preheating, to
Valve body deep hole is passed through protective gas and starts laser melting coating, and preheating temperature is 300-500 DEG C.
Further, the time being passed through described protective gas is 2-3 minute.
Further, the protective gas being passed through is argon.
Further, the horizontal movement velocity of described laser beam is 0.08mm/s-0.15mm/s.
Further, described valve body is fixed on the scroll chuck of positioner clamper, in laser cladding process, described positioner folder
Tool drives described valve body rotation.
Further, the rotating speed of described positioner clamper is 3r/min-10r/min.
Further, when needing Multilayer Laser Cladding, preceding layer is not overlapping with the laser scanning track starting point of later layer,
45～90 ° need to be differed, when the built-up welding number of plies increases by that analogy.
Present invention deep hole processing on valve body blank, in the preset cemented carbide powder in valve body deep hole bottom sealing surface position,
And it is passed through protective gas to valve body deep hole；The laser scanning track of valve deep hole bottom sealing surface laser melting coating is spiral type, swashs
The built-up welding of light cladding is received arc position and is rested on non-tight face, it is to avoid crater crack occurs in sealing surface.Using this manufacture method also
There is eased valve deep hole bottom sealing surface preparative and more efficient production efficiency.
Technique effect below with reference to design, concrete structure and generation to the present invention for the accompanying drawing is described further, with
It is fully understood from the purpose of the present invention, feature and effect.
Brief description
Fig. 1 is valve body sample schematic diagram of the present invention.
Fig. 2 is that valve body deep hole bottom of the present invention processes counterbore 3 schematic diagram.
Fig. 3 preheat for valve body of the present invention after in deep hole bottom preset alloy powder schematic diagram.
Fig. 4 is the laser melting coating schematic diagram after the preset alloy powder of valve body deep hole bottom of the present invention.
Fig. 5 is the a-a profile in Fig. 4.
Fig. 6 is the partial enlarged drawing of part 4 in Fig. 4.
Fig. 7 be valve body laser melting coating of the present invention after with processing dimension contrast schematic diagram.
Fig. 8 is the photo in kind after laser melting coating in the embodiment of the present invention one.
Specific embodiment
Below in conjunction with specific embodiment, technical scheme is further described.It is right that following examples are not constituted
The restriction of the present invention.
The primary structure of the present embodiment is as shown in Figure 1 to 4.It is illustrated in figure 1 the part drawing of valve body sample, wherein built-up welding
A diameter of φ in alloy seal face 2, thickness is h.As shown in Fig. 2 valve body 1 is processed counterbore 3, a diameter of φ of counterbore 3, as
The design size of valve body piece hardfacing alloy sealing surface 2.The valve body 1 processing counterbore 3 is preheated, preheating temperature is by concrete built-up welding
The species of alloy determines.As shown in figure 3, by the counterbore 3 of preset for alloy powder valve body 1 after preheat.As shown in figure 4, putting
Put protection trachea, after being passed through shielding gas 2～3 minutes, laser melting coating is carried out with spiral track, form laser cladding coating 4.
Embodiment one
The valve body laser overlaying welding process of the present embodiment is that 1cr18ni9ti valve body blank is processed hole φ 20mm, hole
Deep 180mm.Process the counterbore of φ 13mm in the bottom in this valve body deep hole hole, counterbore is 1.5mm deeply.This valve is preheated in heating furnace
Body to after 400 DEG C, by valve body clamping positioner clamper scroll chuck on, preset stellite 6 cobalt-based alloy powder is last,
Place protection trachea, be passed through argon 2 minutes.Open positioner clamper and laser, the rotating speed of positioner clamper is 7r/min, laser beam with
0.12mm/s speed moves horizontally, and the continuous laser cladding time is 60s.Fig. 8 is the photo in kind after laser melting coating.
Embodiment two
The valve body laser overlaying welding process of the present embodiment is that 1cr18ni9ti valve body is processed hole φ 35mm, hole depth
120mm, processes the counterbore of φ 20mm in the bottom in this valve body deep hole hole, and hole depth is 3mm, needs 2 layers of laser melting coating.In heating furnace
Middle preheating this valve body to after 400 DEG C, by valve body clamping on the scroll chuck of positioner clamper, preset stellite 6 cobalt-base alloyss
After powder, place protection trachea, be passed through argon 2 minutes.Carry out the 1st layer of laser melting coating, open positioner clamper and laser, positioner presss from both sides
The rotating speed of tool is 6r/min, and laser beam is moved horizontally with 0.10mm/s speed, and the continuous laser cladding time is 85s.Carry out laser
The 2nd layer of cladding, scroll chuck is unclamped, and valve body clamps scroll chuck after rotating 60 ° again, after preset alloy powder, repeats the 1st
Layer laser cladding process.
The preferred embodiment of the present invention described in detail above.It should be appreciated that the ordinary skill of this area need not be created
The property made work just can make many modifications and variations according to the design of the present invention.Therefore, all technical staff in the art
Pass through the available technology of logical analysis, reasoning, or a limited experiment under this invention's idea on the basis of existing technology
Scheme, all should be in the protection domain being defined in the patent claims.
Claims (8)
1. a kind of manufacture method of valve body piece deep hole bottom sealing surface laser melting coating is it is characterised in that process deep on valve body
Hole, processes counterbore in described deep hole bottom, in the preset stellite in counterbore position 6 cobalt-based alloy powder described in described body base
End, and it is passed through beginning laser melting coating, the scanning rail of the laser beam of laser melting coating after protective gas to the described deep hole of described valve body
Mark is spiral type, and the stop position of laser melting coating is in non-tight face, it is to avoid crater crack occurs in sealing surface；In laser melting coating
Before, valve body needs to be preheated in heat-treatment furnace, after valve body completes preheating, is passed through protective gas to valve body deep hole and starts laser
Cladding, preheating temperature is 300-500 DEG C.
2. a kind of manufacture method of valve body piece deep hole bottom sealing surface laser melting coating as claimed in claim 1, its feature exists
In the aperture of described counterbore is equal to the design size of described valve body hardfacing alloy sealing surface.
3. a kind of manufacture method of valve body piece deep hole bottom sealing surface laser melting coating as claimed in claim 1, its feature exists
In the time being passed through described protective gas is 2-3 minute.
4. a kind of manufacture method of valve body piece deep hole bottom sealing surface laser melting coating as claimed in claim 1, its feature exists
In the protective gas being passed through is argon.
5. a kind of manufacture method of valve body piece deep hole bottom sealing surface laser melting coating as claimed in claim 1, its feature exists
In the horizontal movement velocity of described laser beam is 0.08mm/s-0.15mm/s.
6. a kind of manufacture method of valve body piece deep hole bottom sealing surface laser melting coating as claimed in claim 1, its feature exists
In described valve body is fixed on the scroll chuck of positioner clamper, and in laser cladding process, described positioner clamper drives described valve body
Rotation.
7. a kind of manufacture method of valve body piece deep hole bottom sealing surface laser melting coating as claimed in claim 6, its feature exists
In the rotating speed of described positioner clamper is 3r/min-10r/min.
8. a kind of manufacture method of valve body piece deep hole bottom sealing surface laser melting coating as claimed in claim 1, its feature exists
In, when needing Multilayer Laser Cladding, preceding layer is not overlapping with the laser scanning track starting point of later layer, need to differ 45～90 °,
When the built-up welding number of plies increases by that analogy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510261005.4A CN104816093B (en) | 2015-05-20 | 2015-05-20 | Manufacturing method for deep hole bottom sealing surface laser cladding of valve body part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510261005.4A CN104816093B (en) | 2015-05-20 | 2015-05-20 | Manufacturing method for deep hole bottom sealing surface laser cladding of valve body part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104816093A CN104816093A (en) | 2015-08-05 |
| CN104816093B true CN104816093B (en) | 2017-01-25 |
Family
ID=53726697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510261005.4A Expired - Fee Related CN104816093B (en) | 2015-05-20 | 2015-05-20 | Manufacturing method for deep hole bottom sealing surface laser cladding of valve body part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104816093B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106466759B (en) * | 2015-08-11 | 2019-01-22 | 上海交通大学 | Utilize the modified method and device in the modified surface of laser overlaying welding device to hole inner wall surface |
| CN105525288B (en) * | 2015-12-25 | 2018-10-16 | 燕山大学 | A kind of preparation method for strengthening ball seat |
| CN105562890B (en) * | 2016-03-01 | 2018-02-27 | 中国兵器科学研究院宁波分院 | A kind of welding method suitable for small-diameter deep blind hole |
| US10479155B2 (en) | 2017-02-16 | 2019-11-19 | Caterpillar Inc. | Cladding structure and method |
| CN107723702B (en) * | 2017-10-11 | 2020-02-11 | 东北大学 | Laser cladding process |
| CN109261965A (en) * | 2018-11-09 | 2019-01-25 | 成都青石激光科技有限公司 | A kind of plugging technology of turbine buckets of gas turbine piece cover board apical pore |
| CN111451500A (en) * | 2020-04-02 | 2020-07-28 | 航发优材(镇江)增材制造有限公司 | Laser additive repair method for titanium alloy valve rod |
| CN113102900B (en) * | 2021-03-15 | 2023-03-17 | 沈阳万超激光科技有限公司 | Method for improving quality of water-conducting laser-machined hole through heat treatment |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1025829C (en) * | 1992-12-23 | 1994-09-07 | 中国华北电力联合公司北京电力设备总厂 | Laser melting and coating process for sealing surface of small calibre valve |
| US7930825B2 (en) * | 2005-06-16 | 2011-04-26 | Continental Automotive Systems Us, Inc. | Blowout resistant weld method for laser welds for press-fit parts |
| CN101610643B (en) * | 2009-07-14 | 2010-12-01 | 华中科技大学 | Method for processing blind hole by laser |
| CN102518853A (en) * | 2011-11-25 | 2012-06-27 | 南通市电站阀门有限公司 | Overlay welding process for deep holes on valve body sealing surface |
| CN104002057B (en) * | 2014-06-06 | 2017-02-15 | 南通国电电站阀门有限公司 | Process for WB36 valve body sealing surface welding |
| CN104197062A (en) * | 2014-09-02 | 2014-12-10 | 章华 | Structure of sealing surface of valve body of small-diameter high-pressure forged steel stop valve |
-
2015
- 2015-05-20 CN CN201510261005.4A patent/CN104816093B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN104816093A (en) | 2015-08-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104816093B (en) | Manufacturing method for deep hole bottom sealing surface laser cladding of valve body part | |
| CN103624378B (en) | Pipeline Hot Wire TIG Welding connects method | |
| CN102009251B (en) | Full-position welding method for pipeline by full-automatic external welding machine | |
| CN104785911A (en) | Hollow spindle and solid spindle nose welding method | |
| CN105458476B (en) | The welding method of nuclear island of nuclear power station main steam or main feed water pipe road | |
| CN105195872A (en) | Double-sided submerged arc back-chipping-free welding technology for pipeline steel | |
| CN102107314A (en) | Method for overlaying wear-resistant layer of blade shroud of turbine working blade | |
| CN102528237A (en) | Welding process for carbon steel process pipeline | |
| CN108637587A (en) | A kind of babbit-lined metal renovation technique | |
| CN107442891A (en) | A kind of cut deal body longitudinal and girth welding joint and welding procedure | |
| CN102848057B (en) | A kind of repair method of Al and Alalloy weld seam | |
| CN103521900A (en) | MIG (metal inert-gas) welding method for aluminum alloy thick plates in high-speed trains | |
| CN105598596A (en) | Non-preheating combined welding method of 1200MPa high-strength steel | |
| CN101797660A (en) | Strip electrode electroslag surfacing process of nickel-based alloy of tube plate of nuclear power steam generator | |
| JP4757696B2 (en) | UOE steel pipe manufacturing method | |
| CN108480825A (en) | A kind of restorative procedure of the automatic welding line burn through defect of main nuclear power pipeline narrow gap | |
| CN102744499A (en) | Double-side double-arc welding process for root layer of pipeline | |
| CN105081574B (en) | A kind of layering pulse laser reduces the method that invar steel welds hot cracking tendency | |
| CN104588844B (en) | A kind of welding procedure of steel plate | |
| CN112658484A (en) | Welding method of titanium steel bimetal composite plate | |
| CN105750693B (en) | A kind of high-abrasive material overlaying method for reducing preheating temperature | |
| CN105983761A (en) | High-strength steel welding process | |
| JP3827958B2 (en) | Thick plate single-sided welding method of titanium or titanium alloy | |
| CN105583499A (en) | Full-automatic welding method for metal powder-cored wire pipeline girth welding joints | |
| CN111906414B (en) | Large-gap multilayer stepping argon arc welding back cover repairing method for carbon steel pipeline and container |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170125 Termination date: 20200520 |