CN101850489A - Process method for welding and repairing sintering trolley - Google Patents
Process method for welding and repairing sintering trolley Download PDFInfo
- Publication number
- CN101850489A CN101850489A CN 201010148255 CN201010148255A CN101850489A CN 101850489 A CN101850489 A CN 101850489A CN 201010148255 CN201010148255 CN 201010148255 CN 201010148255 A CN201010148255 A CN 201010148255A CN 101850489 A CN101850489 A CN 101850489A
- Authority
- CN
- China
- Prior art keywords
- welding
- content
- weld seam
- cast iron
- stove
- 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.)
- Granted
Links
Images
Landscapes
- Arc Welding In General (AREA)
Abstract
The invention relates to an electric-arc welding, further to a process method for welding and repairing a sintering trolley. The repairing process comprises the following steps: opening a U-shaped groove with slotting welding rods; cleaning the groove with an angle grinder; sequentially welding with cast-iron welding rods in a multilayer manner, and then heating in a furnace; heating the sintering trolley to 900 DEG C, preserving heat for 1 hour and then getting out of the furnace; mechanically reshaping; and finally carrying out heat treatment. Compared with the prior art, the process method has the advantages that no chilling tissues generate, thus lowering the risk of basic cracking while welding and effectively guaranteeing the success of the welding; the welding stress is completely released by using intermittent welding and a string bead during the welding process; and each sintering trolley only needs welding and repairing cost of 2000-5000yuan which is equivalent to about 2% of the price of the sintering trolley, thus saving a large amount of fund.
Description
Technical field
The present invention relates to a kind of arc welding, further relate to a kind of process of pallet REPAIR WELDING.
Background technology
Pallet is the important spare part of sintering machine, work under bad environment, and its chassis intermediate is a spheroidal graphite cast-iron.Because work under bad environment, pallet chassis intermediate in use for some time will produce cracking, and then causes distortion, causes chassis to be scrapped.Sintering machine of steel mill need be equipped with four or five ten to up to a hundred pallet cycle operations.These pallets are worth tens0000 and do not wait to hundreds of thousands according to the size difference.
At first, the pallet intermediate is a spheroidal graphite cast-iron, and the welding difficulty height of cast iron is the problem that the welding circle generally acknowledges.Mainly be cast iron phosphorus content height, plasticity is poor, and tissue odds is even, and weldability is very poor, when welding, and the following problem of general easy appearance:
(1) carbon in the cast iron and silicone content are higher, easily produce pore, and silicon easily produces silica, hinder carrying out smoothly of welding process.
(2) easy scaling loss of graphite element such as carbon and silicon and speed are cold, and owing to the effect of nodulizer magnesium, its air chill tendency of weld seam interface increases, and is easy to generate extremely crisp white iron tissue in the spheroidal graphite cast-iron, and Weld Performance is poor.
(3) cast iron plasticity is poor, and stress is bigger during welding, easily produces the crack.
(4) the pallet wall thickness is big, has strengthened the difficulty of welding greatly.For example: 360m
2The main wall thickness of chassis intermediate is 40～50mm.
Secondly, the pallet work under bad environment, otherwise cracked ends is subjected to the frequent variations of high temperature-low temperature, the mechanical property of spheroidal graphite cast-iron (intensity, plasticity, toughness) height, for example its mechanical property of Chang Yong material QT500-7: σ
b〉=500MPa, so the requirement of the mechanical performance of butt welded seam metal and physical property is all very high.
The 3rd, the size of pallet is big, Heavy Weight, and it is not too convenient to transport, and can only take the mode of on-the-spot REPAIR WELDING.For example: 360m
2Chassis intermediate appearance profile is of a size of 4514mm * 1486mm * 440mm, about 5 tons of gross weight.
Summary of the invention
The process of pallet REPAIR WELDING, described pallet mother metal is a spheroidal graphite cast-iron; Comprise the steps:
At first, adopt the fluting welding rod to open 60 ° of double V-grooves; Angle grinding machine cleaning groove;
Adopt electrode for cast iron, the parameter of described electrode for cast iron is: tensile strength reaches 415 newton/more than the square millimeter, more than the hardness HB210;
Adopt electrode for cast iron welding in order at many levels, the parameter of described electrode for cast iron is: tensile strength reaches 415 newton/m
2More than, more than the hardness HB210; Adopt the bead weld discontinuous welding, the welding rod amplitude of fluctuation is no more than the twice of core diameter; The length of every section welding rod is no more than 7cm; The 1st road weld seam technological parameter: 85 amperes in electric current; After treating that the first road weld seam is cooled to 100 ℃, begin to carry out follow-up weld seam, follow-up weld seam technological parameter: 100 amperes in electric current;
Advance the stove heating: pallet is heated to 900 ℃, is incubated one hour, come out of the stove;
It is orthopedic to carry out machinery; Heat treatment.
Technology for Heating Processing has 2 kinds:
First kind: 920-980 ℃ kept 3 hours, and stove is as cold as 600 ℃, air cooling.
Second kind: 920-980 ℃ kept 3 hours, and stove is chilled to 700-760 ℃ of insulation 4 hours, and stove is chilled to 600 ℃ again, air cooling.
The present invention is with respect to the advantage of prior art:
(1) can in the process of fluting, make mother metal keep lower temperature (to end groove, can touch with hand) at once, can effectively ensure like this, groove face metal and mother metal are consistent, cast iron particularly, can not produce the air chill tissue, the risk of MATRIX CRACKING when reducing welding has effectively ensured the success of welding.
(2) discontinuous welding, string(er) bead is discharged welding stress fully in welding process.
(3) every of REPAIR WELDING cost only requirement be 2000-5000 unit, only be equivalent to about 2% of pallet price, can save a large amount of funds.
Description of drawings
Fig. 1 is the organigram of whole weld seam among the embodiment 1, and 1-10 represents the weld seam of welding successively respectively.
Fig. 2 is a pallet schematic diagram among the embodiment 1; 1-5 numbers corresponding different parts.
The specific embodiment
Embodiment 1:
Contrast Fig. 2 illustrates the working of an invention process.360m as shown in Figure 2
2Chassis intermediate appearance profile schematic diagram is of a size of 4514mm * 1486mm * 440mm, about 5 tons of gross weight.1-5 numbers corresponding different parts among the figure, and corresponding its of 1#-5# detects data in the table 1.
Table 1:360m
2Quality testing data (part) in the pallet intermediate foundry goods
At first, adopt omnipotent 100 fluting welding rods to open 60 ° of double V-grooves;
Then, angle grinding machine cleaning groove, treatment effect: make groove face smoother, expose metallic luster;
Behind the cleaning groove, select for use omnipotent MG289 electrode for cast iron to weld.MG289 tensile strength can reach 60000psi (415 newton/square millimeter), hardness HB210, the mass percentage content of its main component is as follows: C content 1.38%, Ni content 55.4%, Fe content 40.31%, Al content 0.85%, Mo content 0.04%, Cu content 0.04%, Si content 0.006%.
Contrast Fig. 1 adopts the bead weld discontinuous welding, and the welding rod amplitude of fluctuation is no more than the twice of core diameter, promptly 6.5 millimeters; The length of every section welding rod is no more than 7cm; The 1st road weld seam technological parameter: 85 amperes in electric current; After treating that the first road weld seam is cooled to 100 ℃, begin to carry out follow-up 2-10 weld seam, follow-up weld seam technological parameter: 100 amperes in electric current;
Advance the stove heating: pallet is heated to 900 ℃, is incubated 1 hour, come out of the stove;
It is orthopedic to carry out machinery;
Heat treatment: 920-980 ℃ kept 3 hours, and stove is as cold as 600 ℃, air cooling.
Pallet after the reparation has stood the high temperature check of more than 900 degree in the production run process more than 2 years, weldering meets connecting portion without any cracking phenomena.
All the other method steps are identical with embodiment 1, and difference is heat treatment process: 920-980 ℃ kept 3 hours, and stove is chilled to 700-760 ℃ of insulation 4 hours, and stove is chilled to 600 ℃ again, air cooling.
Claims (4)
1. the process of pallet REPAIR WELDING, described pallet mother metal is a spheroidal graphite cast-iron; Comprise the steps:
At first, adopt the fluting welding rod to open 60 ° of double V-grooves;
Angle grinding machine cleaning groove;
Adopt electrode for cast iron welding in order at many levels, the parameter of described electrode for cast iron is: tensile strength reaches 415 newton/m
2More than, more than the hardness HB210; Adopt the bead weld discontinuous welding, the welding rod amplitude of fluctuation is no more than the twice of core diameter; The length of every section welding rod is no more than 7cm; The 1st road weld seam technological parameter: 85 amperes in electric current; After treating that the first road weld seam is cooled to 100 ℃, begin to carry out follow-up weld seam, follow-up weld seam technological parameter: 100 amperes in electric current;
Advance the stove heating: pallet is heated to 900 ℃, is incubated 1 hour, come out of the stove;
It is orthopedic to carry out machinery;
Heat treatment: 920-980 ℃ kept 3 hours, and stove is as cold as 600 ℃, air cooling.
2. according to the process of the described pallet REPAIR WELDING of claim 1, it is characterized in that, described electrode for cast iron comprises the composition of following mass percent: ℃ content 1.38%, Ni content 55.4%, Fe content 40.31%, Al content 0.85%, Mo content 0.04%, Cu content 0.04%, Si content 0.006%.
3. the process of pallet REPAIR WELDING, described pallet mother metal is a spheroidal graphite cast-iron; Comprise the steps:
At first, adopt the fluting welding rod to open 60 ° of double V-grooves;
Angle grinding machine cleaning groove;
Adopt electrode for cast iron, the parameter of described electrode for cast iron is: tensile strength reaches 415 newton/more than the square millimeter, more than the hardness HB210;
Adopt electrode for cast iron welding in order at many levels, the parameter of described electrode for cast iron is: tensile strength reaches 415 newton/more than the m2, more than the hardness HB210; Adopt the bead weld discontinuous welding, the welding rod amplitude of fluctuation is no more than the twice of core diameter; The length of every section welding rod is no more than 7cm; The 1st road weld seam technological parameter: 85 amperes in electric current; After treating that the first road weld seam is cooled to 100 ℃, begin to carry out follow-up weld seam, follow-up weld seam technological parameter: 100 amperes in electric current;
Advance the stove heating: pallet is heated to 900 ℃, is incubated 1 hour, come out of the stove;
It is orthopedic to carry out machinery;
Heat treatment: 920-980 ℃ kept 3 hours, and stove is chilled to 700-760 ℃ of insulation 4 hours, and stove is chilled to 600 ℃ again, air cooling.
4. according to the process of the described pallet REPAIR WELDING of claim 3, it is characterized in that, described electrode for cast iron comprises the composition of following mass percent: C content 1.38%, Ni content 55.4%, Fe content 40.31%, Al content 0.85%, Mo content 0.04%, Cu content 0.04%, Si content 0.006%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101482554A CN101850489B (en) | 2010-04-16 | 2010-04-16 | Process method for welding and repairing sintering trolley |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101482554A CN101850489B (en) | 2010-04-16 | 2010-04-16 | Process method for welding and repairing sintering trolley |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101850489A true CN101850489A (en) | 2010-10-06 |
| CN101850489B CN101850489B (en) | 2012-06-27 |
Family
ID=42802256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101482554A Active CN101850489B (en) | 2010-04-16 | 2010-04-16 | Process method for welding and repairing sintering trolley |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101850489B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103084702A (en) * | 2013-02-05 | 2013-05-08 | 广东韶钢松山股份有限公司 | Welding repair method for trolley breakage of sintering machine |
| CN103084563A (en) * | 2013-02-27 | 2013-05-08 | 南京信息工程大学 | Method for repairing ordinary carbon steel machine part surface damage |
| CN107214439A (en) * | 2017-07-17 | 2017-09-29 | 广西百色银海铝业有限责任公司 | A kind of cast iron solder flux and welding method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4550235A (en) * | 1982-07-30 | 1985-10-29 | Fuewesi Peter | Apparatus for restoring the surfaces surrounding the bores of metallic workpieces |
| CN1030040A (en) * | 1988-04-05 | 1989-01-04 | 重庆大学 | New method of amending surface defects of castings |
| CN1270299A (en) * | 1999-04-12 | 2000-10-18 | 霍亚铭 | Sinter trolley and its making method |
| EP1844894A1 (en) * | 2006-04-12 | 2007-10-17 | Linde Aktiengesellschaft | Process of welding repair of cast materials having a defect; Workpiece made of cast material having such a repaired part; Use of a gas mixing for such process |
| CN101152689A (en) * | 2006-09-28 | 2008-04-02 | 上海宝冶工程技术公司 | Renovation technology for ladle |
-
2010
- 2010-04-16 CN CN2010101482554A patent/CN101850489B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4550235A (en) * | 1982-07-30 | 1985-10-29 | Fuewesi Peter | Apparatus for restoring the surfaces surrounding the bores of metallic workpieces |
| CN1030040A (en) * | 1988-04-05 | 1989-01-04 | 重庆大学 | New method of amending surface defects of castings |
| CN1270299A (en) * | 1999-04-12 | 2000-10-18 | 霍亚铭 | Sinter trolley and its making method |
| EP1844894A1 (en) * | 2006-04-12 | 2007-10-17 | Linde Aktiengesellschaft | Process of welding repair of cast materials having a defect; Workpiece made of cast material having such a repaired part; Use of a gas mixing for such process |
| CN101152689A (en) * | 2006-09-28 | 2008-04-02 | 上海宝冶工程技术公司 | Renovation technology for ladle |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103084702A (en) * | 2013-02-05 | 2013-05-08 | 广东韶钢松山股份有限公司 | Welding repair method for trolley breakage of sintering machine |
| CN103084563A (en) * | 2013-02-27 | 2013-05-08 | 南京信息工程大学 | Method for repairing ordinary carbon steel machine part surface damage |
| CN107214439A (en) * | 2017-07-17 | 2017-09-29 | 广西百色银海铝业有限责任公司 | A kind of cast iron solder flux and welding method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101850489B (en) | 2012-06-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102152058B (en) | Surfacing repair method for large cold-rolled supporting roll | |
| CN105436665B (en) | The method of large-scale hot-rolling supporting roll Cr4 built-up welding reconstruction layer and repaired roller | |
| CN108381027B (en) | Vacuum welding device for preparing high-carbon-equivalent super-thick steel plate and preparation method thereof | |
| CN105478962B (en) | The method of large-scale cold rolling backing roll 70Cr3Mo built-up welding reconstruction layer and repaired roller | |
| CN102418042B (en) | Novel manufacturing process of phi 300 mm-phi 700 mm high-carbon high-chromium cold-working die steel forged round steel | |
| CN102658417B (en) | Welding repair technology of casting defect of high-chromium cast iron | |
| CN105127205B (en) | Large-scale bushing roll for producing strip and preparation method thereof | |
| CN100389924C (en) | P91 steel welding method | |
| CN101920407B (en) | Novel alloy tool steel welding electrode | |
| CN103074482B (en) | Regeneration method of scrapped Cr5 forged-steel working roller | |
| CN103692166A (en) | Preparation method of super-thick alloy steel plate | |
| CN104404510A (en) | Method for restoring cold roll through preparing gradient coating via laser cladding | |
| CN105522085A (en) | Manufacturing method for large section forgings of high-speed tool steel | |
| CN101850489B (en) | Process method for welding and repairing sintering trolley | |
| CN101722385A (en) | Flux-cored wire and method for welding hot-rolled back-up roll by same | |
| CN104209639A (en) | Mold cutting edge repair welding process | |
| CN110480208A (en) | Nickel-base alloy bare welding filler metal and preparation method and welding procedure for LNG storage tank welding | |
| CN102463402A (en) | Process for welding medium-high carbon steel without cracking and deformation | |
| CN103658931B (en) | The method of the double-deck built-up welding of a kind of axletree swage block | |
| KR101273419B1 (en) | Metallic slag pot with new structure and a manufacturing method thereof | |
| CN102796859A (en) | Process for performing heat treatment on heavy thick plate welding structural member | |
| CN108555202A (en) | A kind of manufacturing method of the embedded pin flat bar of diameter forging machine production core grade driving mechanism | |
| CN104561467A (en) | Pre-heat treatment and delayed quenching process for 45CrNiMoVA steel | |
| CN103521995A (en) | Metallurgy sintering fuel breaker roll repairing technology | |
| CN102000922A (en) | Cast iron welding technique using cold welding and bead welding |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |