CN107570843A - A kind of repair welding for preventing weld cracking - Google Patents
A kind of repair welding for preventing weld cracking Download PDFInfo
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- CN107570843A CN107570843A CN201710823337.6A CN201710823337A CN107570843A CN 107570843 A CN107570843 A CN 107570843A CN 201710823337 A CN201710823337 A CN 201710823337A CN 107570843 A CN107570843 A CN 107570843A
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- welding
- weld
- weld seam
- cold water
- sprinkling
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Abstract
The invention discloses a kind of repair welding for preventing weld cracking.Prepare adjustable argon arc welding machine manually, select the welding wire consistent with core body material, and the debris of core body repair welding part surface is polished in advance, processing is clean；Using direct current, the welding current for adjusting argon arc welding machine is not higher than 50A；Prevent weld seam from aoxidizing in atmosphere；In welding process, using argon protecting cover, and with cold water sprinkling weld seam at any time, the face of weld temperature difference is reduced；Continue sprinkling cold water 5 minutes after the completion of welding, until weld seam internal cooling.The present invention continues sprinkling weld seam using cold water, reduces the face of weld temperature difference, prevents weld cracking.Using argon protecting cover, prevent weld seam from aoxidizing.
Description
Technical field：
The invention belongs to titanium alloy plate-fin heat exchanger core body welding technology field, more particularly to one kind prevents weld cracking
Repair welding.
Background technology：
In the vacuum brazing processing technology of titanium alloy plate-fin heat exchanger, titanium alloy easily occurs crisp after high-temperature heating
Become, the core body after vacuum brazing is not present and very has to pass through argon arc welding repair welding without leak source, partial compromise point to make up.
For the Titanium Alloy Welds of embrittlement after subcooled water pressure testing, then by high-temperature soldering, cold and hot difference is excessive, causes repair welding weld seam cooling down
After ftracture.
The information for being disclosed in the background section is merely intended to understanding of the increase to the general background of the present invention, without answering
It has been the prior art well known to persons skilled in the art when being considered as recognizing or implying the information structure in any form.
The content of the invention：
It is an object of the invention to provide a kind of repair welding for preventing weld cracking, so as to overcome it is above-mentioned in the prior art
The defects of.
To achieve the above object, the invention provides a kind of repair welding for preventing weld cracking, its step to be：
(1) prepare adjustable argon arc welding machine manually, select the welding wire consistent with core body material, and in advance core body repair welding
The debris of part surface is polished, and processing is clean；
(2) direct current is used, the welding current for adjusting argon arc welding machine is not higher than 50A；Prevent weld seam from aoxidizing in atmosphere；
(3) in welding process, using argon protecting cover, and with cold water sprinkling weld seam at any time, the face of weld temperature difference is reduced；
(4) sprinkling cold water 5 minutes are continued after the completion of welding, until weld seam internal cooling.
Compared with prior art, the present invention has the advantages that：
Sprinkling weld seam is continued using cold water, the face of weld temperature difference is reduced, prevents weld cracking.Using argon protecting cover, prevent
Only weld seam aoxidizes.
Embodiment：
The embodiment of the present invention is described in detail below, it is to be understood that protection scope of the present invention is not
Limited by embodiment.
Explicitly indicated that unless otherwise other, otherwise in entire disclosure and claims, term " comprising " or its change
Change such as "comprising" or " including " etc. and will be understood to comprise stated element or part, and do not exclude other members
Part or other parts.
A kind of repair welding for preventing weld cracking, its step are：
(1) prepare adjustable argon arc welding machine manually, select the welding wire consistent with core body material, and in advance core body repair welding
The debris of part surface is polished, and processing is clean；
(2) direct current is used, the welding current for adjusting argon arc welding machine is not higher than 50A；Prevent weld seam from aoxidizing in atmosphere；
(3) in welding process, using argon protecting cover, and with cold water sprinkling weld seam at any time, the face of weld temperature difference is reduced；
(4) sprinkling cold water 5 minutes are continued after the completion of welding, until weld seam internal cooling.
The description of the foregoing specific illustrative embodiment to the present invention is to illustrate and the purpose of illustration.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to above-mentioned teaching, can be much changed
And change.The purpose of selecting and describing the exemplary embodiment is that explain that the certain principles of the present invention and its reality should
With so that those skilled in the art can realize and utilize the present invention a variety of exemplaries and
Various chooses and changes.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (1)
1. a kind of repair welding for preventing weld cracking, its step are：
(1) prepare adjustable argon arc welding machine manually, select the welding wire consistent with core body material, and in advance core body repair welding part
The debris on surface is polished, and processing is clean；
(2) direct current is used, the welding current for adjusting argon arc welding machine is not higher than 50A；Prevent weld seam from aoxidizing in atmosphere；
(3) in welding process, using argon protecting cover, and with cold water sprinkling weld seam at any time, the face of weld temperature difference is reduced；
(4) sprinkling cold water 5 minutes are continued after the completion of welding, until weld seam internal cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710823337.6A CN107570843A (en) | 2017-09-13 | 2017-09-13 | A kind of repair welding for preventing weld cracking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710823337.6A CN107570843A (en) | 2017-09-13 | 2017-09-13 | A kind of repair welding for preventing weld cracking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107570843A true CN107570843A (en) | 2018-01-12 |
Family
ID=61036008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710823337.6A Pending CN107570843A (en) | 2017-09-13 | 2017-09-13 | A kind of repair welding for preventing weld cracking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107570843A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111283306A (en) * | 2020-03-12 | 2020-06-16 | 无锡市普尔换热器制造有限公司 | Process for eliminating cracking tendency of argon arc welding seam of nickel-based stainless steel heat exchanger |
-
2017
- 2017-09-13 CN CN201710823337.6A patent/CN107570843A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111283306A (en) * | 2020-03-12 | 2020-06-16 | 无锡市普尔换热器制造有限公司 | Process for eliminating cracking tendency of argon arc welding seam of nickel-based stainless steel heat exchanger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180112 |