CN105728897A - Surfacing technique for sealing surface - Google Patents
Surfacing technique for sealing surface Download PDFInfo
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- CN105728897A CN105728897A CN201410744738.9A CN201410744738A CN105728897A CN 105728897 A CN105728897 A CN 105728897A CN 201410744738 A CN201410744738 A CN 201410744738A CN 105728897 A CN105728897 A CN 105728897A
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Abstract
The invention discloses a surfacing technique for a sealing surface. The surfacing technique comprises the following steps that (1) environment requirements are set; (2) the operation specifically comprises the steps that (2.1) the integrity of a welding machine is supposed to be checked before welding, and (2.2) a workpiece to be welded is prepared; (3) the surfacing requirements are set; (4) postweld treatment is conducted; and (5) checking is conducted. According to the surfacing technique for the sealing surface, operation is easy, the experience requirement for an operator is low, and the product quality is high.
Description
Technical field
The present invention relates to a kind of sealing surface weld deposit technique.
Background technology
The adjustment in processing step and device parameter etc. of the existing sealing surface weld deposit technique there is also certain empirical and technical, for the operator newly started with, in addition it is also necessary to carry out substantial amounts of exercise and could grasp operation skill, produces the good product of quality.
Summary of the invention
In order to realize the purpose of the present invention, the present invention provides the sealing surface weld deposit technique of a kind of easy to operate, quick, easy left-hand seat.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that
A kind of sealing surface weld deposit technique, comprises the steps:
1), environmental requirement:
1.1), welding should carry out in indoor, and welding place should wind sheltering；
1.2), place be not allow for water stain, more not in the place welding having hydrops；
1.3), relative humidity more than 90%, when ambient temperature is lower than 5oC, do not allow welding；
2), operating procedure:
2.1), the integrity of butt welding machine is answered to check before welding；
2.2) preparation of workpiece, is welded:
2.2.1), must carrying out the workpiece of built-up welding first by groove face processing machine surfacing part, its size has to comply with drawing requirement；
2.2.2), with the compression clean welding position of air blow drying and inner chamber before welding；
2.2.3), to inside nominal diameter more than 150, apply oxy arc before the nominal pressure valve body built-up welding more than 2.5MPa and preheat around sealing surface；
2.2.4) workpiece, to built-up welding STL alloy, can carry out built-up welding after all preheating with oxy arc, and its preheating temperature is 300-600oC；
3), built-up welding requires:
3.1), built-up welding time, adopt level welding, arc manipulation speed is uniform, must not teeter, adopt short arc welding；
3.2) after, being soldered one layer, it is necessary to thoroughly remove slag and can carry out second layer welding；
3.3), for the built-up welding (width is more than 30mm) of wide sealing surface, should the built-up welding layer by layer from both sides, centre is finally filled up, to reduce welding stress；
4), after welding treatment:
4.1), the workpiece that welds must be positioned in dry ground or dry husky (dry lime) groove, never accurate be positioned over wet ground or the place having water to splash；
4.2), for small workpiece (flap, flashboard), apply dry sand and bury, allow its Slow cooling, make workpiece be in normalized condition；
5), inspection.
The present invention is simple to operate, and operator's skill requirement is low, and product quality is high.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described:
A kind of sealing surface weld deposit technique, comprises the steps:
1), environmental requirement:
1.1), welding should carry out in indoor, and welding place should wind sheltering；
1.2), place be not allow for water stain, more not in the place welding having hydrops；
1.3), relative humidity more than 90%, when ambient temperature is lower than 5oC, do not allow welding；
2), operating procedure:
2.1), the integrity of butt welding machine is answered to check before welding；
2.2) preparation of workpiece, is welded:
2.2.1), must carrying out the workpiece of built-up welding first by groove face processing machine surfacing part, its size has to comply with drawing requirement；
2.2.2), with the compression clean welding position of air blow drying and inner chamber before welding；
2.2.3), to inside nominal diameter more than 150, apply oxy arc before the nominal pressure valve body built-up welding more than 2.5MPa and preheat around sealing surface；
2.2.4) workpiece, to built-up welding STL alloy, can carry out built-up welding after all preheating with oxy arc, and its preheating temperature is 300-600oC；
3), built-up welding requires:
3.1), built-up welding time, adopt level welding, arc manipulation speed is uniform, must not teeter, adopt short arc welding；
3.2) after, being soldered one layer, it is necessary to thoroughly remove slag and can carry out second layer welding；
3.3), for the built-up welding (width is more than 30mm) of wide sealing surface, should the built-up welding layer by layer from both sides, centre is finally filled up, to reduce welding stress；
4), after welding treatment:
4.1), the workpiece that welds must be positioned in dry ground or dry husky (dry lime) groove, never accurate be positioned over wet ground or the place having water to splash；
4.2), for small workpiece (flap, flashboard), apply dry sand and bury, allow its Slow cooling, make workpiece be in normalized condition；
5), inspection:
5.1), the workpiece that Quality Inspector's reply welds carries out on-the-spot full inspection；
5.2), visual weld bead quality requires:
5.3), face of weld must not have crackle, pore and field trash；
5.4), weld seam must not exceed more than body plane 3.0mm；
5.5), weld seam be not allow for serious undercut phenomenon, i.e. the undercut degree of depth is not more than 0.5mm, and undercut continuous length is not more than 100mm；
5.6), penetrating inspection requires: undertaken by JB/T4730 requirement；
5.7), should show without any dependent linearity；
5.8), should without the associated circular vestige of more than 5mm in key dimension face；
5.9), on the same line, must not have 4 or more than 4 intervals less than 1.6mm(limit to limit) associated circular vestige；
5.10), in region, pressure contact seal face, must not there is any relevant vestige；
6, Hardness Surveillance:
6.1) making a sample block, in a lot, sealing surface surface is carried out machining, after its processing, overlay cladding thickness is drawing requirement minimum thickness；
6.2), carrying out hardness number mensuration at overlay cladding, whole circumference up sampling point is not less than 5, and inside nominal diameter is more than 100, and sample point is not less than 8；
6.3), the distribution of sample point should be distributed at even circumferential, take into account diametric(al) simultaneously；
6.4), all index should meet the hardness number of drawing requirement.
Claims (1)
1. a sealing surface weld deposit technique, it is characterised in that comprise the steps:
1), environmental requirement:
1.1), welding should carry out in indoor, and welding place should wind sheltering；
1.2), place be not allow for water stain, more not in the place welding having hydrops；
1.3), relative humidity more than 90%, when ambient temperature is lower than 5oC, do not allow welding；
2), operating procedure:
2.1), the integrity of butt welding machine is answered to check before welding；
2.2) preparation of workpiece, is welded:
2.2.1), must carrying out the workpiece of built-up welding first by groove face processing machine surfacing part, its size has to comply with drawing requirement；
2.2.2), with the compression clean welding position of air blow drying and inner chamber before welding；
2.2.3), to inside nominal diameter more than 150, apply oxy arc before the nominal pressure valve body built-up welding more than 2.5MPa and preheat around sealing surface；
2.2.4) workpiece, to built-up welding STL alloy, can carry out built-up welding after all preheating with oxy arc, and its preheating temperature is 300-600oC；
3), built-up welding requires:
3.1), built-up welding time, adopt level welding, arc manipulation speed is uniform, must not teeter, adopt short arc welding；
3.2) after, being soldered one layer, it is necessary to thoroughly remove slag and can carry out second layer welding；
3.3), for the built-up welding (width is more than 30mm) of wide sealing surface, should the built-up welding layer by layer from both sides, centre is finally filled up, to reduce welding stress；
4), after welding treatment:
4.1), the workpiece that welds must be positioned in dry ground or dry husky (dry lime) groove, never accurate be positioned over wet ground or the place having water to splash；
4.2), for small workpiece (flap, flashboard), apply dry sand and bury, allow its Slow cooling, make workpiece be in normalized condition；
5), inspection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410744738.9A CN105728897A (en) | 2014-12-09 | 2014-12-09 | Surfacing technique for sealing surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410744738.9A CN105728897A (en) | 2014-12-09 | 2014-12-09 | Surfacing technique for sealing surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105728897A true CN105728897A (en) | 2016-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410744738.9A Pending CN105728897A (en) | 2014-12-09 | 2014-12-09 | Surfacing technique for sealing surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105728897A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106180970A (en) * | 2016-08-23 | 2016-12-07 | 山西阳煤化工机械（集团）有限公司 | A kind of for gasification furnace vessel flange strip surfacing method |
| CN108161177A (en) * | 2017-12-26 | 2018-06-15 | 江苏利柏特股份有限公司 | A kind of opening conduit end increases the welding technique of cobalt-based stiffening layer |
-
2014
- 2014-12-09 CN CN201410744738.9A patent/CN105728897A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106180970A (en) * | 2016-08-23 | 2016-12-07 | 山西阳煤化工机械（集团）有限公司 | A kind of for gasification furnace vessel flange strip surfacing method |
| CN106180970B (en) * | 2016-08-23 | 2018-02-27 | 山西阳煤化工机械（集团）有限公司 | One kind is used for gasification furnace vessel flange strip surfacing method |
| CN108161177A (en) * | 2017-12-26 | 2018-06-15 | 江苏利柏特股份有限公司 | A kind of opening conduit end increases the welding technique of cobalt-based stiffening layer |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160706 |