CN103286468A - Dissimilar steel welding process of check door and tubing - Google Patents
Dissimilar steel welding process of check door and tubing Download PDFInfo
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- CN103286468A CN103286468A CN2013102584934A CN201310258493A CN103286468A CN 103286468 A CN103286468 A CN 103286468A CN 2013102584934 A CN2013102584934 A CN 2013102584934A CN 201310258493 A CN201310258493 A CN 201310258493A CN 103286468 A CN103286468 A CN 103286468A
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Abstract
The invention relates to a metal machining process, in particular to a dissimilar steel welding process of a check door and a tubing. The welding process comprises the following steps: confirming that a valve body is made of WC9 alloy steel, confirming that the tubing matched with the valve body is made of F91 heat resistant steel, selecting an R40 welding wire and an R407 welding rod, adopting a heating belt to preheat a workpiece, setting the current of a welding machine, connecting the valve body and the tubing in a spot welding mode, carrying out backing welding through the R40 welding wire, carrying out cap welding through the R407 welding rod, carrying out tempering and heat treatment through the heating belt after welding is carried out, and carrying out radiographic inspection on welded portions. The dissimilar steel welding process of the check door and the tubing has the advantages of improving the welding quality of the check door and the tubing effectively, guaranteeing safe operation of a pipeline, reducing the repair rate caused by quality problems, and accordingly reducing production and management cost.
Description
Technical field
The present invention relates to metal working process, concrete is a kind of processing step of welding of non-return door pipe arrangement dissimilar steel.
Background technology
Traditional non-return door is that control medium flows backwards.In order to cut down the consumption of energy, improve generating efficiency, generating equipment is just towards maximization, high parameter, high-performance development.This Project design is to add a pipe arrangement at valve inlet, plays the effect of saving the energy.Valve and pipe arrangement are plugged into, and generally adopt flange form and welded type, mainly discuss the mode of plugging into of welded type here.The parts of two kinds of unlike materials are welded together, and weld seam can not there be defectives such as crackle, seepage, have bigger difficulty.Use material dissimilar steel valve body (WC9) and pipe arrangement (F91) with regard to non-return family of power and influence body of the present invention, prior art is welded these two kinds of different material components at present, easily produces the above-mentioned quality problems of enumerating, and this will influence normal, the safe operation of pipeline.
Summary of the invention
In order to address the above problem, the present invention proposes a kind of technology of welding of non-return door pipe arrangement dissimilar steel, overcome the prior art deficiency, improved valve body material and pipe arrangement material welding quality.
In order to reach the foregoing invention purpose, the present invention proposes following technical scheme:
The technology of the welding of non-return door pipe arrangement dissimilar steel, technique for welding are according to following steps:
The first step: the material of confirming valve body is the WC9 steel alloy;
Second step: the material of the pipe arrangement that affirmation and valve body are supporting is F91 heat resisting steel;
The 3rd step: select the welding rod of model R40 welding wire and R407 for use, the diameter of welding rod is Φ 4mm, Φ 5mm;
The 4th step: adopt the pre-heated work pieces in heating tape, preheat temperature is 200 ℃ ~ 250 ℃;
The 5th step: cure welding rod, the condition of curing is 200 ℃ of-250 ℃ * 1h;
The 5th step: setting welding current is Φ 4:100 A ~ 140A; Φ 5:140 A ~ 180A;
The 6th step: spot welding is connected with pipe arrangement with valve body;
The 7th step: with R40 welding wire bottoming welding;
The 8th step: with the cover welding of R407 welding rod;
The 9th step: postwelding heating tape tempering heat treatment, temperature are 700 ℃ ~ 720 ℃, insulation 3h;
The tenth step: the welding position is carried out radiographic inspection.
It is described that the welding position is carried out radiographic inspection is standard implementation according to GB3323 " radiography of steel weld seam and egative film grade separation method ".
Advantage of the present invention is to improve the welding quality of non-return door and pipe arrangement effectively, ensures the safe operation of pipeline; Reduce the repair rate that produces because of quality problems, thereby reduced the production and operation cost.
Description of drawings
Fig. 1 is schematic diagram of the present invention.
Among the figure: valve body 1, pipe arrangement 2, welding position 3.
The specific embodiment
For the present invention is further introduced, introduce below in conjunction with specification:
The technology of the welding of non-return door pipe arrangement dissimilar steel, technique for welding are according to following steps:
The first step: the material of confirming valve body 1 is the WC9 steel alloy;
Second step: confirm that the material with the supporting pipe arrangement 2 of valve body 2 is F91 heat resisting steel;
The 3rd step: select the welding rod of model R40 welding wire and R407 for use, the diameter of welding rod is Φ 4mm, Φ 5mm;
The 4th step: adopt the pre-heated work pieces in heating tape, preheat temperature is 200 ℃ ~ 250 ℃;
The 5th step: cure welding rod, the condition of curing is 200 ℃ of-250 ℃ * 1h;
The 5th step: setting welding current is Φ 4:100 A ~ 140A; Φ 5:140 A ~ 180A;
The 6th step: 2 spot welding are connected with pipe arrangement with valve body 1;
The 7th step: with R40 welding wire bottoming welding;
The 8th step: with the cover welding of R407 welding rod;
The 9th step: postwelding heating tape tempering heat treatment, temperature are 700 ℃ ~ 720 ℃, insulation 3h;
The tenth step: the standard according to GB3323 " radiography of steel weld seam and egative film grade separation method " is carried out radiographic inspection to welding position 3.
Claims (2)
1. the technology of the welding of non-return door pipe arrangement dissimilar steel is characterized in that following steps:
The first step: the material of confirming valve body is the WC9 steel alloy;
Second step: the material of the pipe arrangement that affirmation and valve body are supporting is F91 heat resisting steel;
The 3rd step: select the welding rod of model R40 welding wire and R407 for use, the diameter of welding rod is Φ 4mm, Φ 5mm;
The 4th step: adopt the pre-heated work pieces in heating tape, preheat temperature is 200 ℃ ~ 250 ℃;
The 5th step: cure welding rod, the condition of curing is 200 ℃ of-250 ℃ * 1h;
The 5th step: setting welding current is Φ 4:100 A ~ 140A; Φ 5:140 A ~ 180A;
The 6th step: spot welding is connected with pipe arrangement with valve body;
The 7th step: with R40 welding wire bottoming welding;
The 8th step: with the cover welding of R407 welding rod;
The 9th step: postwelding heating tape tempering heat treatment, temperature are 700 ℃ ~ 720 ℃, insulation 3h;
The tenth step: the welding position is carried out radiographic inspection.
2. the technology of the welding of non-return door pipe arrangement dissimilar steel according to claim 1 is characterized in that it is standard implementation according to GB3323 " radiography of steel weld seam and egative film grade separation method " that the welding position is carried out radiographic inspection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310258493.4A CN103286468B (en) | 2013-06-26 | 2013-06-26 | The technique of the welding of non-return door pipe arrangement dissimilar steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310258493.4A CN103286468B (en) | 2013-06-26 | 2013-06-26 | The technique of the welding of non-return door pipe arrangement dissimilar steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103286468A true CN103286468A (en) | 2013-09-11 |
| CN103286468B CN103286468B (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310258493.4A Active CN103286468B (en) | 2013-06-26 | 2013-06-26 | The technique of the welding of non-return door pipe arrangement dissimilar steel |
Country Status (1)
| Country | Link |
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| CN (1) | CN103286468B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104014916A (en) * | 2014-06-06 | 2014-09-03 | 南通国电电站阀门有限公司 | F91 valve body and 10CrMo910 tubing dissimilar steel welding method |
| CN104070271A (en) * | 2014-07-02 | 2014-10-01 | 南通国电电站阀门有限公司 | Dissimilar steel welding method of 15 Cr1Mo1V valve body and WB 36 piping |
| CN111545942A (en) * | 2020-05-20 | 2020-08-18 | 南通市力沛流体阀业有限公司 | Dissimilar steel welding method for C12A valve body and F22 piping |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102862029A (en) * | 2012-09-24 | 2013-01-09 | 南通国电电站阀门有限公司 | Valve, and welding method of valve body |
| CN102873462A (en) * | 2012-10-13 | 2013-01-16 | 南通国电电站阀门有限公司 | Process for welding swing check valve and matching pipe |
-
2013
- 2013-06-26 CN CN201310258493.4A patent/CN103286468B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102862029A (en) * | 2012-09-24 | 2013-01-09 | 南通国电电站阀门有限公司 | Valve, and welding method of valve body |
| CN102873462A (en) * | 2012-10-13 | 2013-01-16 | 南通国电电站阀门有限公司 | Process for welding swing check valve and matching pipe |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104014916A (en) * | 2014-06-06 | 2014-09-03 | 南通国电电站阀门有限公司 | F91 valve body and 10CrMo910 tubing dissimilar steel welding method |
| CN104014916B (en) * | 2014-06-06 | 2016-08-17 | 南通国电电站阀门有限公司 | F91 valve body and 10CrMo910 pipe arrangement different steel weld method |
| CN104070271A (en) * | 2014-07-02 | 2014-10-01 | 南通国电电站阀门有限公司 | Dissimilar steel welding method of 15 Cr1Mo1V valve body and WB 36 piping |
| CN104070271B (en) * | 2014-07-02 | 2016-03-09 | 南通国电电站阀门有限公司 | 15Cr1Mo1V valve body and WB36 pipe arrangement different steel weld method |
| CN111545942A (en) * | 2020-05-20 | 2020-08-18 | 南通市力沛流体阀业有限公司 | Dissimilar steel welding method for C12A valve body and F22 piping |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103286468B (en) | 2016-01-20 |
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Address after: 226557, Taoyuan West Road, Chengnan street, Rugao City, Jiangsu, Nantong province 1 Patentee after: Nantong State Electric Power Valve Co., Ltd. Address before: 226557, Taoyuan West Road, Taoyuan Town, Nantong City, Jiangsu, Rugao 1 Patentee before: Nantong State Electric Power Valve Co., Ltd. |
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| CP03 | Change of name, title or address |