CN103212915A - Marine casting soldering method - Google Patents
Marine casting soldering method Download PDFInfo
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- CN103212915A CN103212915A CN2013101194071A CN201310119407A CN103212915A CN 103212915 A CN103212915 A CN 103212915A CN 2013101194071 A CN2013101194071 A CN 2013101194071A CN 201310119407 A CN201310119407 A CN 201310119407A CN 103212915 A CN103212915 A CN 103212915A
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Abstract
The invention discloses a marine casting soldering method. The method comprises the following steps of a preparing stage, i.e. selecting a welding strip; forming a welding seam beveled edge, i.e. forming an opened welding seam beveled edge, removing a crack source, and meanwhile making the two ends of the crack source arc-shaped; welding a welding seam, i.e. welding the welding seam by using the baked welding strip of which the model is E5015 and the diameter is 4mm, wherein an electrode manipulation way is a reciprocating way as well as a swinging way, and pre-heating the welding seam and fully filling the melting side of the welding seam in a reciprocating way, wherein the swinging way can promote the fusion of the edge of the welding seam; and performing oil quenching through butter. The welding strip is selected and processed, meanwhile the corresponding electrode manipulation way is adopted to weld the welding seam, the key point is that the oil quenching way is adopted, and a casting is soldered by an ordinary welding strip. The method is low in soldering cost, good in soldering effect and convenient to operate, and does not easily fail, and the soldering time is shortened, so that construction is guaranteed to be performed orderly.
Description
Technical field
The present invention relates to technical field of ships, is a kind of boats and ships mending of iron castings method specifically.
Background technology
Ship structure design is tight, and the cast iron welded unit is more, causes some defectives when cast iron welds easily.Especially heavy castings, under the help of simulation casting, though reduced most defective, because actual operate miss, being difficult to control of high-temperature molten steel all can make foundry goods produce various defectives, such as crackle or the like, influences the performance of foundry goods.In order to repair these defectives, generally adopt soldering to carry out the repairing of defective, soldering also is a method for repairing and mending the most common, most convenient.
In the prior art, mainly adopt welding cast iron to vulcanize and two kinds of repair weldings of cast iron cold-patch for the repair welding of cast iron welding.Cast iron is vulcanized the soldering position that often is subjected to equipment, shelve the place, and the restriction of factor such as natural environment, the heating condition harshness of casting iron hot-weld often shows as the outside heat height simultaneously, the inner non-uniform phenomenon that does not reach, the thickness of cast iron itself is thicker, and cooling velocity is very fast, needs the heating of side weld limit, make operation easier strengthen, easily cause the generation of white structure and cause the soldering failure.The cast iron cold-patch is had higher requirement to the selection of welding material except that to the technological requirement strictness, does not have slightly can soldering to fail at once, thereby increased the expense of soldering, iron weld repair is failure in a single day, and the difficulty of soldering is just bigger once more, and successful probability is also just low more.
At above two kinds of technologies, because it requires height to technical quality and equipment, time-consuming, cost is also higher relatively, meets key equipment and damages, and also can cause stop work and production, causes damage to enterprise.
Summary of the invention
The technical problem to be solved in the present invention is to provide the electric welding of a kind of employing common welding rod, the boats and ships mending of iron castings method that realization is low-cost, technical quality is high.
Technical solution of the present invention is, a kind of boats and ships mending of iron castings method of following structure is provided, and may further comprise the steps:
1) preparatory stage: selecting model for use is E4303, and diameter is the formation of the welding rod of 3.2mm as weld groove; Selecting model for use is E5015, and diameter is that the welding rod of 4mm is made welding usefulness, and is placed on and adopts the temperature constant temperature more than 350 degrees centigrade to cure in the incubator 1～2 hour;
2) formation of weld groove: the employing model is E4303, and diameter is that the welding rod of 3.2mm is done and snapped the seam groove, removes formation of crack, and making the formation of crack both ends simultaneously is circular arc;
3) weld seam welding: with the model of having cured is E5015, diameter is that the welding rod butt welded seam of 4mm welds, the mode of arc manipulation is the reciprocating type teeter formula that adds back and forth, and reciprocating type back and forth butt welded seam carries out preheating and fills up edge-melting, and the teeter formula then can promote the fusion on joint edge edge;
4) oil quenching: when weld seam operation end foundry goods still is in the red heat state, cover with butter immediately, in the process that butter covers, should be noted that the sound that has or not metal, do not have the then soldering success of words of metal sound.
Adopt above method, the present invention compared with prior art has the following advantages: adopt the present invention, by the selection and the processing of welding rod, use corresponding manipulation of electrode butt welded seam simultaneously and weld, key is to have used the oil quenching technology, finishes the soldering of common welding rod to foundry goods; Soldering cost of the present invention is low, and welding effect is good, and is easy to operate, is difficult for breaking down, and has shortened the time of soldering, thereby ensures carrying out in order of construction.
As improvement, in step 4, when butter covers, use hammering method that hammering is carried out at the soldering position, eliminate welding stress and crystal grain thinning, when butter is cooled to 500 degrees centigrade, stop hammering, the butter that solidifies gradually plays insulation effect to the soldering position; The design of this step combines oil quenching and hammering are effective, can effectively remove welding stress and crystal grain thinning, reduces the white structure of commissure, thereby has improved welding effect.
As improvement, multilayer when welding, with weld interpass temperature at 200～500 degrees centigrade; Because when interlayer temperature was low, weld seam cooled off easy cracking under field conditions (factors), cause the soldering failure, interlayer temperature is too high, and then service speed is difficult to catch up with, and this number range had both improved the success rate of soldering.
The specific embodiment
The invention will be further described with regard to specific embodiment below.
Boats and ships mending of iron castings method of the present invention may further comprise the steps:
1) preparatory stage: selecting model for use is E4303, and diameter is the formation of the welding rod of 3.2mm as weld groove; Selecting model for use is E5015, and diameter is that the welding rod of 4mm is made welding usefulness, and is placed on and adopts the temperature constant temperature more than 350 degrees centigrade to cure in the incubator 1～2 hour;
2) formation of weld groove: the employing model is E4303, and diameter is that the welding rod of 3.2mm is done and snapped the seam groove, removes formation of crack, and making the formation of crack both ends simultaneously is circular arc;
3) weld seam welding: with the model of having cured is E5015, diameter is that the welding rod butt welded seam of 4mm welds, the mode of arc manipulation is the reciprocating type teeter formula that adds back and forth, and reciprocating type back and forth butt welded seam carries out preheating and fills up edge-melting, and the teeter formula then can promote the fusion on joint edge edge;
4) oil quenching: when weld seam operation end foundry goods still is in the red heat state, cover with butter immediately, in the process that butter covers, should be noted that the sound that has or not metal, do not have the then soldering success of words of metal sound.
Butter has the possibility of burning in the step 4, should be noted that to increase butter at any time.
In step 4, when butter covers, use hammering method that hammering is carried out at the soldering position, eliminate welding stress and crystal grain thinning, when butter is cooled to 500 degrees centigrade, stop hammering, the butter that solidifies gradually plays insulation effect to the soldering position.
Multilayer when welding, with weld interpass temperature at 200～500 degrees centigrade; Because when interlayer temperature was low, weld seam cooled off easy cracking under field conditions (factors), cause the soldering failure, interlayer temperature is too high, and then service speed is difficult to catch up with, and therefore interlayer temperature is arranged in this number range.
When iron weld repair, make sure to keep in mind and can not carry out, as have the place of draught in the excessive place of wind-force, when running into wind-force, barrier should be set stop wind or suspend soldering work greater than 2m/s.
Method of the present invention not only can be used for the soldering of boats and ships itself, also is applicable on the cast steel equipment of boats and ships simultaneously, because in the process of transportation, may cause damage to this equipment, can adopt this method that cast steel equipment is carried out soldering.
Below only just preferred embodiment of the present invention be described, but can not be interpreted as it is restriction to claim.The present invention not only is confined to above embodiment, and its concrete grammar allows variation.In a word, all various variations of being done in the protection domain of independent claims of the present invention are all in protection scope of the present invention.
Claims (3)
1. boats and ships mending of iron castings method is characterized in that: may further comprise the steps:
1) preparatory stage: selecting model for use is E4303, and diameter is the formation of the welding rod of 3.2mm as weld groove; Selecting model for use is E5015, and diameter is that the welding rod of 4mm is made welding usefulness, and is placed on and adopts the temperature constant temperature more than 350 degrees centigrade to cure in the incubator 1～2 hour;
2) formation of weld groove: the employing model is E4303, and diameter is that the welding rod of 3.2mm is done and snapped the seam groove, removes formation of crack, and making the formation of crack both ends simultaneously is circular arc;
3) weld seam welding: with the model of having cured is E5015, diameter is that the welding rod butt welded seam of 4mm welds, the mode of arc manipulation is the reciprocating type teeter formula that adds back and forth, and reciprocating type back and forth butt welded seam carries out preheating and fills up edge-melting, and the teeter formula then can promote the fusion on joint edge edge;
4) oil quenching: when weld seam operation end foundry goods still is in the red heat state, cover with butter immediately, in the process that butter covers, should be noted that the sound that has or not metal, do not have the then soldering success of words of metal sound.
2. boats and ships mending of iron castings method according to claim 1, it is characterized in that: in step 4, when butter covers, use hammering method that hammering is carried out at the soldering position, eliminate welding stress and crystal grain thinning, when butter is cooled to 500 degrees centigrade, stop hammering, the butter that solidifies gradually plays insulation effect to the soldering position.
3. boats and ships mending of iron castings method according to claim 1 is characterized in that: multilayer when welding, with weld interpass temperature at 200～500 degrees centigrade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310119407.1A CN103212915B (en) | 2013-03-28 | 2013-03-28 | Boats and ships mending of iron castings method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310119407.1A CN103212915B (en) | 2013-03-28 | 2013-03-28 | Boats and ships mending of iron castings method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103212915A true CN103212915A (en) | 2013-07-24 |
| CN103212915B CN103212915B (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310119407.1A Expired - Fee Related CN103212915B (en) | 2013-03-28 | 2013-03-28 | Boats and ships mending of iron castings method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106808058A (en) * | 2017-01-22 | 2017-06-09 | 大连理工大学 | A kind of repair method of austenitic stainless steel casting core pump case |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0224197B2 (en) * | 1984-04-16 | 1990-05-28 | Sumitomo Metal Ind | |
| CN1066015A (en) * | 1992-03-23 | 1992-11-11 | 武汉钢铁公司 | The fast welding method of ironcasting |
| CN102000922A (en) * | 2010-12-09 | 2011-04-06 | 湖南华菱湘潭钢铁有限公司 | Cast iron welding technique using cold welding and bead welding |
-
2013
- 2013-03-28 CN CN201310119407.1A patent/CN103212915B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0224197B2 (en) * | 1984-04-16 | 1990-05-28 | Sumitomo Metal Ind | |
| CN1066015A (en) * | 1992-03-23 | 1992-11-11 | 武汉钢铁公司 | The fast welding method of ironcasting |
| CN102000922A (en) * | 2010-12-09 | 2011-04-06 | 湖南华菱湘潭钢铁有限公司 | Cast iron welding technique using cold welding and bead welding |
Non-Patent Citations (2)
| Title |
|---|
| 姚如日等: "涂黄油铸铁冷焊", 《焊接技术》, no. 3, 30 September 1982 (1982-09-30), pages 40 - 49 * |
| 郑樟荣: "可锻铸铁汽车零件的焊补", 《焊接技术》, no. 3, 30 September 1981 (1981-09-30), pages 42 - 44 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106808058A (en) * | 2017-01-22 | 2017-06-09 | 大连理工大学 | A kind of repair method of austenitic stainless steel casting core pump case |
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| Publication number | Publication date |
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| CN103212915B (en) | 2016-05-04 |
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Addressee: Ningbo Master Ship Design Co., Ltd. Document name: Notification of an Office Action |
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Address after: Jiangdong District Baizhang road 315040 Zhejiang city in Ningbo Province, 28 Lane 1, room 1702 International Trade Building or Cetra Building house B Applicant after: Ningbo Master Ship Design Co., Ltd. Address before: 315040 Zhejiang province Ningbo City Jiangdong Sangtian Road No. 688 5 floor Applicant before: Ningbo Master Ship Design Co., Ltd. |
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Granted publication date: 20160504 Termination date: 20170328 |