CN104816093A - 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
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- CN104816093A CN104816093A CN201510261005.4A CN201510261005A CN104816093A CN 104816093 A CN104816093 A CN 104816093A CN 201510261005 A CN201510261005 A CN 201510261005A CN 104816093 A CN104816093 A CN 104816093A
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- valve body
- deep hole
- sealing surface
- melting coating
- laser melting
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- 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
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- Optics & Photonics (AREA)
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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, particularly a kind of manufacture method adopting laser melting coating valve body sealing surface.
Background technology
The built-up welding of valve body piece deep hole bottom sealing surface is a difficult problem for valve body manufacturing enterprise always.At present, domestic most valve body manufacturing enterprise all adopts welding rod to carry out artificial hand arc-welding welding, the main problem existed has: 1) adopt welding rod to carry out the built-up welding of manual arc deep hole, smog is full of in the hole of deep hole, welder cannot observe appearance of weld, feel completely by welder operates, the shaping bad defect of normal appearance, the implementation difficulty of welding procedure; 2) built-up welding of welding rod manual arc deep hole is adopted, can not built-up welding continuously due to the limited length of welding rod, often crater crack is there is at welding stop position, and cannot repair welding due to operation sight line difference, cause the welding quality of deep hole bottom overlay cladding deep hole built-up welding cannot ensure at all; 3) adopting the built-up welding of manual arc deep hole, often there is dreg defect in the welding slag cleaning difficulty of electrode coating; 4) for above-mentioned reasons, often there is the defects such as shaping bad, crackle, slag inclusion in the built-up welding of manual arc deep hole, causes welding quality unstable, cause the qualification rate of product very low.Valve manufacture enterprise is in order to reduce costs, and carry out repeatedly repair welding after again being processed by underproof for built-up welding product, cause the penalty of the valve body matrix of sealing surface, this repeatedly repair welding can leave potential safety hazard.In recent years, scientific and technical personnel have carried out the technological improvement of deep hole bottom built-up welding, as patent " a kind of overlay welding process for deep holes on valve body sealing surface " (number of patent application: 201110380548.X) adopts in body base processing technology hole, adopt air-introduced machine that welding fume is emptying, this patented technology can alleviate the visuality difference problem that in welding process, smog causes.Patent " WB36 valve body sealing surface welding procedure " proposes the valve body sealing surface bead-welding technology of the two-step method adopting built-up welding toughness transition zone, namely first built-up welding is compared with the transition zone of soft, then transition zone turnery processing is become plane, built-up welding hard sealing surface again, this patented technology can alleviate the crack problem of sealing surface weld deposit carbide alloy.By literature search, although deep hole heap is welded with some technological improvements, because technology or the reason of technique own also exist limitation, above-mentioned manual arc deep hole built-up welding problem all can not be solved completely.
Therefore, those skilled in the art is devoted to develop a kind of deep hole sealing surface manufacture method with simpler and easy preparation.
Summary of the invention
Because the problems referred to above of prior art, the object of the invention is to overcome deficiency of the prior art, a kind of valve parts deep hole sealing surface weld deposit manufacture method adopting laser melting and coating technique is proposed, there is the deep hole sealing surface manufacture method of simpler and easy preparation, solve the problem of the welding procedures such as valve body piece deep hole sealing surface weld deposit visuality is poor, crackle, slag inclusion and welding quality instability.
For achieving the above object; the invention provides a kind of manufacture method of valve body piece deep hole bottom sealing surface laser melting coating; comprise; deep hole processing on valve body, at deep hole bottom processing counterbore, at the preset alloy powder in body base counterbore position; and laser melting coating is started after valve body deep hole passes into protective gas; the track while scan of the laser beam of laser melting coating is spirality, and the stop position of laser melting coating, in non-tight face, avoids crater crack to appear at sealing surface.
Further, the aperture of counterbore equals the design size of valve hardfacing alloy sealing surface.
Further, before laser melting coating, valve body needs to carry out preheating in heat-treatment furnace, and after valve body completes preheating, pass into protective gas start laser melting coating to valve body deep hole, preheat temperature is 300-500 DEG C.
Further, the time passing into described protective gas is 2-3 minute.
Further, the protective gas passed into is argon gas.
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, and in laser cladding process, described positioner drives described valve body to rotate.
Further, the rotating speed of described positioner is 3r/min-10r/min.
Further, when needs Multilayer Laser Cladding, front one deck is not overlapping with the laser scanning track starting point of later layer, need differ 45 ~ 90 °, when the built-up welding number of plies increases by that analogy.
The present invention is deep hole processing on valve body blank, at the preset cemented carbide powder in valve body deep hole bottom sealing surface position, and passes into protective gas to valve body deep hole; The laser scanning track of valve deep hole bottom sealing surface laser melting coating is spirality, and the built-up welding of laser melting coating is received arc position and rested on non-tight face, avoids crater crack to appear at sealing surface.This manufacture method is adopted also to have the more easy valve deep hole bottom sealing surface property prepared and more efficient production efficiency.
Be described further below with reference to the technique effect of accompanying drawing to design of the present invention, concrete structure and generation, to understand object of the present invention, characteristic sum effect fully.
Accompanying drawing explanation
Fig. 1 is valve body sample schematic diagram of the present invention.
Fig. 2 is valve body deep hole bottom of the present invention processing counterbore 3 schematic diagram.
Fig. 3 is at the preset alloy powder schematic diagram of deep hole bottom after valve body preheating of the present invention.
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 parts 4 in Fig. 4.
Fig. 7 contrasts schematic diagram with processing dimension after valve body laser melting coating of the present invention.
Fig. 8 is the photo in kind in the embodiment of the present invention one after laser melting coating.
Detailed description of the invention
Below in conjunction with specific embodiment, technical scheme of the present invention is further described.Following examples do not form limitation of the invention.
The primary structure of the present embodiment as shown in Figure 1 to 4.Be illustrated in figure 1 the part drawing of valve body sample, wherein the diameter of hardfacing alloy sealing surface 2 is
thickness is H.As shown in Figure 2, valve body 1 is processed counterbore 3, the diameter of counterbore 3 is
be the design size of valve body piece hardfacing alloy sealing surface 2.To process valve body 1 preheating of counterbore 3, preheat temperature is determined by the kind of concrete hardfacing alloy.As shown in Figure 3, by counterbore 3 place of preset for alloy powder valve body 1 after preheat.As shown in Figure 4, place protection tracheae, pass into protection gas after 2 ~ 3 minutes, carry out laser melting coating with spiral track, form laser cladding coating 4.
Embodiment one
The valve body laser overlaying welding process of the present embodiment is, by 1Cr18Ni9Ti valve body blank machining hole
hole depth 180mm.Process in the bottom in this valve body deep hole hole
counterbore, counterbore is 1.5mm deeply.In heating furnace after this valve body to 400 of preheating DEG C, by valve body clamping positioner clamper scroll chuck on, preset Satellite 6 cobalt-based alloy powder is last, places protection tracheae, passes into argon gas 2 minutes.Open positioner clamper and laser, the rotating speed of positioner is 7r/min, and laser beam moves with 0.12mm/s velocity level, 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, by 1Cr18Ni9Ti valve body machining hole
hole depth 120mm, processes in the bottom in this valve body deep hole hole
counterbore, hole depth is 3mm, needs laser melting coating 2 layers.In heating furnace after this valve body to 400 of preheating DEG C, by valve body clamping on the scroll chuck of positioner clamper, preset Satellite 6 cobalt-based alloy powder is last, places protection tracheae, passes into argon gas 2 minutes.Carry out laser melting coating the 1st layer, open positioner clamper and laser, the rotating speed of positioner is 6r/min, and laser beam moves with 0.10mm/s velocity level, and the continuous laser cladding time is 85s.Carry out laser melting coating the 2nd layer, unclamped by scroll chuck, valve body clamps scroll chuck after rotating 60 ° again, after preset alloy powder, repeats the 1st layer of laser cladding process.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that the ordinary skill of this area just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all technical staff in the art, all should by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (9)
1. the manufacture method of a valve body piece deep hole bottom sealing surface laser melting coating; it is characterized in that; deep hole processing on valve body; at described deep hole bottom processing counterbore; the preset alloy powder in counterbore position described in described body base, and laser melting coating is started after the described deep hole of described valve body passes into protective gas, the track while scan of the laser beam of laser melting coating is spirality; the stop position of laser melting coating, in non-tight face, avoids crater crack to appear at sealing surface.
2. the manufacture method of a kind of valve body piece deep hole bottom sealing surface laser melting coating as claimed in claim 1, is characterized in that, the aperture of described counterbore equals the design size of described valve hardfacing alloy sealing surface.
3. the manufacture method of a kind of valve body piece deep hole bottom sealing surface laser melting coating as claimed in claim 1; it is characterized in that; before laser melting coating; valve body needs to carry out preheating in heat-treatment furnace; after valve body completes preheating; pass into protective gas to valve body deep hole and start laser melting coating, preheat temperature is 300-500 DEG C.
4. the manufacture method of a kind of valve body piece deep hole bottom sealing surface laser melting coating as claimed in claim 1, it is characterized in that, the time passing into described protective gas is 2-3 minute.
5. the manufacture method of a kind of valve body piece deep hole bottom sealing surface laser melting coating as claimed in claim 1, it is characterized in that, the protective gas passed into is argon gas.
6. the manufacture method of a kind of valve body piece deep hole bottom sealing surface laser melting coating as claimed in claim 1, it is characterized in that, the horizontal movement velocity of described laser beam is 0.08mm/s-0.15mm/s.
7. the manufacture method of a kind of valve body piece deep hole bottom sealing surface laser melting coating as claimed in claim 1, it is characterized in that, described valve body is fixed on the scroll chuck of positioner clamper, and in laser cladding process, described positioner drives described valve body to rotate.
8. the manufacture method of a kind of valve body piece deep hole bottom sealing surface laser melting coating as claimed in claim 7, it is characterized in that, the rotating speed of described positioner is 3r/min-10r/min.
9. the manufacture method of a kind of valve body piece deep hole bottom sealing surface laser melting coating as claimed in claim 1, it is characterized in that, when needs Multilayer Laser Cladding, front one deck is not overlapping with the laser scanning track starting point of later layer, 45 ~ 90 ° need be differed, when the built-up welding number of plies increases by that analogy.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510261005.4A CN104816093B (en) | 2015-05-20 | 2015-05-20 | Manufacturing method for deep hole bottom sealing surface laser cladding of valve body part |
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| CN201510261005.4A CN104816093B (en) | 2015-05-20 | 2015-05-20 | Manufacturing method for deep hole bottom sealing surface laser cladding of valve body part |
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| CN104816093B CN104816093B (en) | 2017-01-25 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105525288A (en) * | 2015-12-25 | 2016-04-27 | 燕山大学 | Manufacturing method for intensified ball valve seat |
| CN105562890A (en) * | 2016-03-01 | 2016-05-11 | 中国兵器科学研究院宁波分院 | Welding method applicable to small-diameter deep blind hole |
| CN106466759A (en) * | 2015-08-11 | 2017-03-01 | 上海交通大学 | Method and device using the modified surface modification of laser overlaying welding device to hole inner wall surface |
| CN107723702A (en) * | 2017-10-11 | 2018-02-23 | 东北大学 | A kind of laser melting and coating process |
| WO2018151917A2 (en) | 2017-02-16 | 2018-08-23 | Caterpillar Inc. | Cladding structure and method |
| 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 |
| CN113102900A (en) * | 2021-03-15 | 2021-07-13 | 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 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106466759A (en) * | 2015-08-11 | 2017-03-01 | 上海交通大学 | Method and device using the modified surface modification of laser overlaying welding device to hole inner wall surface |
| CN105525288A (en) * | 2015-12-25 | 2016-04-27 | 燕山大学 | Manufacturing method for intensified ball valve seat |
| CN105562890A (en) * | 2016-03-01 | 2016-05-11 | 中国兵器科学研究院宁波分院 | Welding method applicable to small-diameter deep blind hole |
| 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 |
| WO2018151917A2 (en) | 2017-02-16 | 2018-08-23 | Caterpillar Inc. | Cladding structure and method |
| DE112018000361T5 (en) | 2017-02-16 | 2019-10-02 | Caterpillar Inc. | PACKAGING STRUCTURE AND METHOD |
| US10479155B2 (en) | 2017-02-16 | 2019-11-19 | Caterpillar Inc. | Cladding structure and method |
| CN107723702A (en) * | 2017-10-11 | 2018-02-23 | 东北大学 | A kind of laser melting and coating 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 |
| CN113102900A (en) * | 2021-03-15 | 2021-07-13 | 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 |
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| CN104816093B (en) | 2017-01-25 |
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