CN1040533A - Double-balance method for welding cast irons - Google Patents
Double-balance method for welding cast irons Download PDFInfo
- Publication number
- CN1040533A CN1040533A CN 88106270 CN88106270A CN1040533A CN 1040533 A CN1040533 A CN 1040533A CN 88106270 CN88106270 CN 88106270 CN 88106270 A CN88106270 A CN 88106270A CN 1040533 A CN1040533 A CN 1040533A
- Authority
- CN
- China
- Prior art keywords
- welding
- weld
- weld seam
- ferronickel
- cast iron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims description 10
- 235000000396 iron Nutrition 0.000 title abstract description 4
- 229910001018 Cast iron Inorganic materials 0.000 claims abstract description 7
- 229910000863 Ferronickel Inorganic materials 0.000 claims abstract description 7
- 238000005266 casting Methods 0.000 claims abstract description 4
- 238000010891 electric arc Methods 0.000 claims abstract description 4
- 238000005516 engineering process Methods 0.000 claims abstract description 4
- 238000005406 washing Methods 0.000 claims abstract 2
- 210000001503 joint Anatomy 0.000 claims 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052742 iron Inorganic materials 0.000 abstract description 3
- 208000037656 Respiratory Sounds Diseases 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 230000011218 segmentation Effects 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The present invention is the crackle of electric welding welding cast iron, the splicing of two block casting iron, and the technology of casting defect can be welded all cast irons.Adopt electric arc to cut off weld seam for two V-arrangement weld grooves, select the washing trough of ferronickel welding rod at last together for use, even weld is divided into plurality of sections, order welding in accordance with regulations, and postwelding does not split the quality rate can be about 98%.
Description
This invention is the method for electric welding welding cast iron, can weld all cast irons.
At present both at home and abroad the solder technology to ironcasting has two kinds, and one, autogenous soldering give heat with whole work-piece before the welding, after the welding, wants equally more than the temperature raising to 600 ℃, and it is still very low not split rate with the natural cold cut of stove, postwelding; Two, electric welding method, the method mostly adopt " short section ", " intermittently ", " dispersion ", " hammering " operation.One section of every welding (10-20cm), to be cooled to below 60 ℃, the hammering concave point that gives up carries out hypomere again, and it is low that inefficiency, postwelding do not split the quality rate, and do not eliminate because of internal stress, stays hidden danger.
The purpose of this invention is to propose to improve work efficiency, improves postwelding and does not split the quality rate, eliminates the cast iron welding method of internal stress hidden danger.
It is that the electric arc cutting weld seam of 140-170A is two V-arrangement weld grooves that the present invention adopts electric current, adopts the ferronickel welding rod to wash together at last, to improve the Cast Iron Surface metallographic structure, adopts the ferronickel welding rod press the DC welder negative or positive electrode by tying T506, and electric current is transferred at 120-160A.Give heat for 150-200 ℃ at the peripheral 100-200cm of foundry goods welding zone place earlier.Even weld is divided into plurality of sections, and arc is transported excellent method fast in taking, and the segmentation continuous sequence is reported to the leadship after accomplishing a task with the acnode that falls and to be staggered.Welding is finished,, heats up at the peripheral 150-250cm of welding zone place with gas welding flame greater than the welding zone temperature,
Than the high 60-100 of weld seam ℃, wind sheltering is slowly cooling naturally.
But advantage of the present invention is continuous welding, has saved equipment such as electric muffle furnace, has also reduced labour intensity.Particularly outstanding under temperature usually postwelding do not split the quality rate and can guarantee about 98%.Weld strength increases tension than body and increases 0.5-1kg/mm
2More than, plasticity increases 0.5-1kg/mm
2Whole foundry goods has been eliminated hidden danger because heat temperature amount and stress equilibrium have been eliminated internal stress, and some iron machines are turned waste into wealth.Behind the mending of iron castings, processing such as cutting, boring still do as usual.
Fig. 1 is two V-arrangement weld grooves for the cast iron surface plate weld seam cuts off.
Fig. 2, even weld segmentation and welding be program successively.Among the figure 1,2,3 ..., the expression segmentation.I, II, III ... the expression welding is program successively."
" the expression traffic direction.
The special weld seam of Fig. 3 (as garden, triangle etc.) is segmentation and welding priority program evenly:
With electric current is that the electric arc of 150A cuts off weld seam and is two V-arrangement weld grooves.Adopt ferronickel 408 welding rod 4m/m to wash together at last,, adopt ferronickel 408 welding rod 4m/m to connect the DC welder positive pole to improve the cast(ing) surface metallographic structure, or negative pole access node T506.Electric current is transferred at 140A, is 180 ℃ in the peripheral 150cm place's preheating of foundry goods welding zone earlier.Even weld is divided into plurality of sections, and arc is transported excellent method fast in taking, and the segmentation continuous sequence is reported to the leadship after accomplishing a task with the acnode that falls and to be staggered.Welding finishes, and, heats up greater than the welding zone temperature at the peripheral 200cm of welding zone place with gas welding flame, and higher 80 ℃ than weld seam, wind sheltering is cooled off naturally.
Claims (2)
1, the two balancing technique technologies of cast iron welding are a kind of electric welding casting welding technology, it is characterized in that cuing off weld seam by wall thickness with electric arc becomes two V-arrangement weld grooves (1), operating current 140-170A.Select the washing trough of ferronickel welding rod at last together for use, weld with DC welder.Weld seam (2) is anodal with the knot T506 butt joint of ferronickel welding rod butt joint negative pole, operating current 120-160A.Even weld is divided into plurality of sections, order welding in accordance with regulations.
2, by the described cast iron welding method of claim 1, before it is characterized in that welding, around weld seam, locate to give heat to 150-200 ℃, welding is complete to improve 60-300 ℃ of temperature with gas welding flame farther place around weld seam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88106270 CN1040533A (en) | 1988-08-24 | 1988-08-24 | Double-balance method for welding cast irons |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88106270 CN1040533A (en) | 1988-08-24 | 1988-08-24 | Double-balance method for welding cast irons |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1040533A true CN1040533A (en) | 1990-03-21 |
Family
ID=4834175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88106270 Pending CN1040533A (en) | 1988-08-24 | 1988-08-24 | Double-balance method for welding cast irons |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1040533A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105290562A (en) * | 2015-12-01 | 2016-02-03 | 哈尔滨第一机械集团有限公司 | Arc cutting operation method for welding rod |
-
1988
- 1988-08-24 CN CN 88106270 patent/CN1040533A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105290562A (en) * | 2015-12-01 | 2016-02-03 | 哈尔滨第一机械集团有限公司 | Arc cutting operation method for welding rod |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |