CN1231318C - Grooved dummy head repair method - Google Patents
Grooved dummy head repair method Download PDFInfo
- Publication number
- CN1231318C CN1231318C CN 02155083 CN02155083A CN1231318C CN 1231318 C CN1231318 C CN 1231318C CN 02155083 CN02155083 CN 02155083 CN 02155083 A CN02155083 A CN 02155083A CN 1231318 C CN1231318 C CN 1231318C
- Authority
- CN
- China
- Prior art keywords
- bar head
- grooved
- dummy bar
- working face
- welding
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The present invention relates to a method for repairing a groove-shaped dummy bar head. An overlaying welding repair technology and a specific auxiliary tool device are adopted to repair the groove-shaped dummy bar head for making the groove-shaped dummy bar head repeatedly utilized; the present invention reduce production cost, dispenses with large processing devices, and has low repair cost. The method not only ensures the taper and circular arc transition of the groove-shaped working surface, the heat resistance of overlaying welding and metal protective layers resisting heat fatigue but also enhances the service life of the groove-shaped dummy bar head.
Description
Technical field: the present invention relates to a kind of restorative procedure of steel-making continuous casting equipment, particularly a kind of restorative procedure of grooved dummy bar head.
Background technology: the grooved dummy bar head is one of vitals on the steel-making continuous casting machine, generally makes with ZG35CrMo, and nearly 1 ton of its single-piece weight is worth tens thousand of units, and the grooved dummy bar head has the grooved working face of particular design.Because the operating mode of grooved dummy bar head is abominable, its failure mode mainly shows as the heat fatigue be full of cracks of grooved working face, and generally speaking, tiny heat fatigue be full of cracks does not influence the use of dummy bar head, but causes the acceleration expansion of crackle easily; When heat fatigue be full of cracks is relatively more serious, crack depth is during greater than 20mm, dummy bar head can not guarantee safe throwing, must change.The grooved working face design of grooved dummy bar head has tapering and the arc transition of being convenient to take off automatically ingot, and repairing has suitable difficulty, the dummy bar head of scrapping at present generally to do the steel scrap processing, has very big waste.
Summary of the invention: the technical issues that need to address of the present invention are how to repair the dummy bar head of scrapping, and for solving this technical problem, have proposed a kind of restorative procedure of grooved dummy bar head, and its concrete processing step is as follows:
1. remove the fatigue crack on the dummy bar head grooved working face, dye penetrant inspection affirmation fatigue crack is thoroughly removed;
2. weld one or more reinforcement at the back side of dummy bar head grooved working face, reinforcement thickness is greater than 25mm, and width is greater than 100mm, and length is identical with the grooved face length;
3. dummy bar head is gone into the stove preheating about 3 hours to 300 ℃ ~ 350 ℃, be incubated about 2 hours;
4. repair dummy bar head grooved working face with the built-up welding of heat resisting steel welding rod, in the weld deposit process, with alumina-silicate refractory fibre blanket that the non-surfacing part parcel of dummy bar head is tight, and be datum level with the dummy bar head groove bottom, at any time check the tapering and the arc transition of grooved working face with the grooved template, and the flatness of assurance overlay cladding, every built-up welding one deck makes it keep certain compression with hand hammer hammering layer;
5. after built-up welding finished, with dummy bar head temper immediately, about 580 ℃ of temperatures be incubateds about 2 hours, after the insulation end, immediately dummy bar head are come out of the stove, and wrap up slow cooling with alumina-silicate refractory fibre blanket;
6. the dummy bar head slow cooling is to room temperature, remove reinforcement, scar is cut to smooth in the back side with sanding machine polishing dummy bar head grooved working face, polishing grooved working face is to being smooth to the touch, at any time check with grooved template and Steel Ruler, reconditioning at any time makes tapering, arc transition and the flatness of grooved working face reach instructions for use.
Used grooved template, its shape is consistent with the shape of cross section of new grooved dummy bar head die cavity.
Adopt the present invention that the grooved dummy bar head is repaired, can make the recycling of grooved dummy bar head, reduce production costs; And need not large-sized processing equipment, rehabilitation cost is cheap, can guarantee the tapering and the arc transition of its grooved working face, heat-resisting, service life that the thermal fatigue resistance coat of metal also can improve the grooved dummy bar head of built-up welding.
Description of drawings:
Fig. 1 is a grooved dummy bar head dimension sketch of the present invention
Fig. 2 is a grooved dummy bar head A-A view of the present invention
Fig. 3 is a grooved dummy bar head renovation technique sketch of the present invention
Fig. 4 is a grooved formwork structure sketch of the present invention
Among the figure: 1-grooved dummy bar head grooved working face, 2-grooved dummy bar head die cavity, 3-closes datum level in the school, 4-grooved dummy bar head, 5-reinforcement, 6-grooved template.
The specific embodiment: with reference to Fig. 4, according to the size that marks on the dummy bar head drawing, design a grooved template 6, its shape is consistent with the shape of cross section of new grooved dummy bar head die cavity 2, method with Wire EDM is accurately made, and grooved template 6 materials can be used the A3 steel or stainless steel.With reference to Fig. 1,2,3, concrete renovation technique is as follows:
1. remove on the dummy bar head grooved working face 1 fatigue crack, dye penetrant inspection confirms that fatigue crack thoroughly removes;
2. weld one or more reinforcement 5 at the back side of dummy bar head grooved working face, reinforcement thickness is greater than 25mm, and width is greater than 100mm, and length is identical with the grooved face length;
3. dummy bar head is gone into the stove preheating about 3 hours to 300 ℃ ~ 350 ℃, be incubated about 2 hours;
4. repair dummy bar head grooved working face 1 with the built-up welding of heat resisting steel welding rod, in the weld deposit process, with alumina-silicate refractory fibre blanket that grooved dummy bar head 4 non-surfacing part parcels are tight, and be that datum level 3 is closed in the school with the dummy bar head groove bottom, at any time check the tapering and the arc transition of grooved working face with grooved template 6, and the flatness of assurance overlay cladding, every built-up welding one deck makes it keep certain compression with hand hammer hammering layer;
5. after built-up welding finished, with grooved dummy bar head 4 temper immediately, about 580 ℃ of temperatures were incubated about 2 hours.Insulation is come out of the stove grooved dummy bar head 4 immediately, and is wrapped up slow cooling with alumina-silicate refractory fibre blanket after finishing;
6. 4 slow cooling of grooved dummy bar head are to room temperature, remove reinforcement 5, scar is cut to smooth in the back side with sanding machine polishing grooved dummy bar head grooved working face 1, polishing grooved working face is to being smooth to the touch, at any time check with grooved template and Steel Ruler, reconditioning at any time makes tapering, arc transition and the flatness of grooved working face reach instructions for use.
Claims (2)
1, a kind of restorative procedure of grooved dummy bar head is characterized in that: concrete processing step is as follows:
Fatigue crack on a, the removal dummy bar head grooved working face, dye penetrant inspection affirmation fatigue crack is thoroughly removed;
B, weld one or more reinforcement at the back side of dummy bar head grooved working face, reinforcement thickness is greater than 25mm, and width is greater than 100mm, and length is identical with the grooved face length;
C, with dummy bar head go into the stove preheating about 3 hours to 300 ℃～350 ℃, be incubated about 2 hours;
Dummy bar head grooved working face is repaired in d, the built-up welding of usefulness heat resisting steel welding rod, in the weld deposit process, with alumina-silicate refractory fibre blanket that the non-surfacing part parcel of dummy bar head is tight, and be datum level with the dummy bar head groove bottom, at any time check the tapering and the arc transition of grooved working face with the grooved template, and the flatness of assurance overlay cladding, every built-up welding one deck makes it keep certain compression with hand hammer hammering layer;
After e, built-up welding finished, with dummy bar head temper immediately, about 580 ℃ of temperatures be incubateds about 2 hours, after the insulation end, immediately dummy bar head are come out of the stove, and wrap up slow cooling with alumina-silicate refractory fibre blanket;
F, dummy bar head slow cooling are to room temperature, remove reinforcement, scar is cut to smooth in the back side with sanding machine polishing dummy bar head grooved working face, polishing grooved working face is to being smooth to the touch, at any time check with grooved template and Steel Ruler, reconditioning at any time makes tapering, arc transition and the flatness of grooved working face reach instructions for use.
2, the restorative procedure of grooved dummy bar head as claimed in claim 1 is characterized in that used grooved template, and its shape is consistent with the shape of cross section of new grooved dummy bar head die cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02155083 CN1231318C (en) | 2002-12-20 | 2002-12-20 | Grooved dummy head repair method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02155083 CN1231318C (en) | 2002-12-20 | 2002-12-20 | Grooved dummy head repair method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1507969A CN1507969A (en) | 2004-06-30 |
| CN1231318C true CN1231318C (en) | 2005-12-14 |
Family
ID=34235694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02155083 Expired - Fee Related CN1231318C (en) | 2002-12-20 | 2002-12-20 | Grooved dummy head repair method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1231318C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100457354C (en) * | 2007-01-10 | 2009-02-04 | 哈尔滨汽轮机厂有限责任公司 | Pile-up welding method of turbine low pressure heater pipe plate and shell, water chamber junction |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100589921C (en) * | 2008-06-24 | 2010-02-17 | 中国第一冶金建设有限责任公司 | Repair method of box-shaped apron wheel mechanism |
| CN101773994B (en) * | 2009-01-08 | 2012-06-13 | 苏州有色金属研究院有限公司 | Slow cooling device for reducing bottom warp of aluminum alloy ingot |
| CN103042339A (en) * | 2013-01-22 | 2013-04-17 | 时鹏 | Pump cover repair technology |
| CN105397046A (en) * | 2015-12-03 | 2016-03-16 | 中冶连铸技术工程有限责任公司 | Round billet dummy ingot device |
-
2002
- 2002-12-20 CN CN 02155083 patent/CN1231318C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100457354C (en) * | 2007-01-10 | 2009-02-04 | 哈尔滨汽轮机厂有限责任公司 | Pile-up welding method of turbine low pressure heater pipe plate and shell, water chamber junction |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1507969A (en) | 2004-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103084703B (en) | A kind of large-scale interior empty steel-casting mends built-up welding reproducing method by replacing a damaged part | |
| CN103481010B (en) | A kind of full-automatic online cold welding pattching roll squeezer technique | |
| CN109468634A (en) | A kind of laser melting and coating technique restores the process of milling train step pad precision | |
| CN105108444B (en) | The reparation of high-temperature service shearing equipment cutter and intensifying method | |
| CN102848057B (en) | A kind of repair method of Al and Alalloy weld seam | |
| CN104741499A (en) | Sandwich layer forging die and preparation method of forging die sandwich layer surfacing | |
| CN1923444A (en) | Hydraulic turbine rotary wheel palm axle head defect handling method | |
| CN1231318C (en) | Grooved dummy head repair method | |
| CN113681233A (en) | Rapid and efficient local repair method for crystallizer copper plate | |
| CN101422850B (en) | Flat-head cap build-up welding repair method | |
| CN113182646A (en) | Surfacing device and repairing process for abrasion of large vertical shaft end of finishing mill | |
| JP5829518B2 (en) | Metallurgical slag pot having a new structure and manufacturing method thereof | |
| CN217394001U (en) | Simple welding device for cracking of large-scale high-voltage motor base lug | |
| CN111250824A (en) | Welding device and repair process for inner hole wear surface of upper cross beam of large hydraulic press | |
| CN111215830A (en) | Method for repairing cracks of high-pressure medium-carbon cast steel oil cylinder body with thickness larger than 200mm | |
| JP5845223B2 (en) | Welding method of crushing claws of crushers for building demolition | |
| CN1846886A (en) | Reinforced compound planar and curved roll | |
| CN210388012U (en) | Welding device for large aluminum forging alloy lifting appliance of high-speed wheel | |
| Ryabtsev et al. | Fatigue life of specimens after wear-resistant, manufacturing and repair surfacing | |
| CN211866832U (en) | Welding device for inner hole wear surface of upper cross beam of large hydraulic press | |
| CN108048878A (en) | A kind of metal-based compound coating crust breaking hammer | |
| CN104152896B (en) | Weld fillet surface modification method and device under combined action of nano repairing particles and laser shock strengthening | |
| CN111054996A (en) | Roll fish scale pattern accurate hole pattern approaching surfacing repair process | |
| CN214769578U (en) | Large-scale vertical scroll end wearing and tearing build-up welding device of finishing mill | |
| CN116441669A (en) | Reinforcing welding method for R-angle cracking of lifting arm of large structural part |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051214 Termination date: 20161220 |