CN202934253U - Device for simulating production of P92 steel weld joint metal microcracks - Google Patents
Device for simulating production of P92 steel weld joint metal microcracks Download PDFInfo
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- CN202934253U CN202934253U CN 201220702290 CN201220702290U CN202934253U CN 202934253 U CN202934253 U CN 202934253U CN 201220702290 CN201220702290 CN 201220702290 CN 201220702290 U CN201220702290 U CN 201220702290U CN 202934253 U CN202934253 U CN 202934253U
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- test block
- force application
- microcracks
- bolts
- steel
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 26
- 239000010959 steel Substances 0.000 title claims abstract description 26
- 239000002184 metal Substances 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title abstract 5
- 238000012360 testing method Methods 0.000 claims abstract description 27
- 239000011888 foil Substances 0.000 claims abstract description 13
- 238000003466 welding Methods 0.000 abstract description 7
- 230000007246 mechanism Effects 0.000 abstract description 4
- 238000011160 research Methods 0.000 abstract description 3
- 208000037656 Respiratory Sounds Diseases 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000012113 quantitative test Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a device for simulating production of P92 steel weld joint metal microcracks. The device for simulating the production of the P92 steel weld joint metal microcracks comprises a P92 steel test block. A U-shaped groove is formed in the upper portion of the steel test block. Force applying plates are respectively connected with two sides, parallel to the groove, of the test block in a welding mode. The two force applying plates are connected with each other through a plurality of bolts. A strain foil is attached at the bottom of the test block. The strain foil is connected with a stress tester through wires. The stress tester is connected with a computer. Four screw holes are formed in each force applying plate, and are divided into an upper row and a lower row which are parallel and symmetrical. The two force applying plates are connected together through that four holes penetrate through the corresponding screw holes, wherein two bolts in an upper row are fixedly connected on the force applying plates, and two bolts in a lower row are movably connected on the force applying plates. The device for simulating the production of the P92 steel weld joint metal microcracks is simple in structure, convenient to operate and capable of simulating the production of the P92 steel weld joint metal microcracks, so that important conditions are provided for researches on mechanisms of the P92 steel weld joint metal microcracks.
Description
Technical field
The utility model relates to a kind of device that produces P92 steel weld metal microcrack of simulating, and belongs to metal material field.
Background technology
At present, the ultra supercritical unit has become the Main Trends of The Development of thermal power generation, China put into operation and large quantities of ultra supercritical fired power generating unit of building in, live steam piping has adopted the P92 jessop basically, this steel, because having higher elevated temperature strength and creep-resistant property, also is widely used in the header of ultra supercritical unit.
The P92 steel of domestic current application mainly relies on external import, and applicating history is not very long, therefore in the pipe arrangement of P92 steel live steam piping is made and welding process is installed, some problems have appearred, especially a large amount of microcracks that exist in weld metal, the height of its occurrence probability has become the threat of unit safety stable operation, more seriously, the mechanism at present crackle produced is still unclear, qualitative needing to crackle further inquired into and checking, and judge that accordingly weld seam inside lacks foundation without no longer producing this type of crackle in this type of crackle or running, the generation of visible such crackle and existence all will produce impact to safety and the stable of electrical network of unit, become ultra supercritical Construction of Unit and problem demanding prompt solution in service.
Summary of the invention
The purpose of this utility model is for overcoming above-mentioned the deficiencies in the prior art, and a kind of device that produces P92 steel weld metal microcrack of simulating is provided, for research P92 steel microcrack mechanism provides essential condition.
For achieving the above object, the utility model adopts following technical proposals:
A kind of device that produces P92 steel weld metal microcrack of simulating, comprise that a top has the P92 steel test block of " U " type groove, a force application board is welded respectively in the test block both sides upper end parallel with the groove center line, between two force application boards, by some bolts, is connected.
Foil gauge is posted in the bottom of described test block, and foil gauge is connected with measuring stress instrument by wire, and measuring stress instrument is connected with computer.
Described force application board material is Mayari.
Be equipped with four parallel and symmetrical screws of two rows on described every force application board, between two force application boards, by four bolts, through corresponding screw, be connected, wherein two bolts of upper row are fixedly connected on force application board, and two bolts of lower row are movably connected on force application board.
The utility model when application, first process 2 of force application boards, the force application board steel plate is Mayari, specification is 400mm * 200mm * (40mm-60mm); Bore again 4 screws on force application board.4 of heat-resisting alloy steel set bolts, specification is M30 * 150.1 of measuring stress instrument, high temperature strain foil several pieces, one of notebook computer, for quantitative test stress application value." U " type groove is processed in the test block of P92 steel.Force application board is welded in to the test block both sides parallel with groove face, and foil gauge is pasted in test block bottom, and force application board is applied to top power in opposite directions, by the measuring stress instrument test stress, reaches bottom and presents after certain compression numerical value by the fixing applied stress of bolt.By existing welding procedure, under the constraint stress condition, weld test block.The polishing face of weld, utilize phase resonance, TOFD or ultrasonic method to detect the weld seam underbead crack, cutting crackle place section, quantity, form and the size of observing crackle.
The beneficial effects of the utility model are that the utility model is simple in structure, easy to operate, can simulate the microcrack produced in P92 steel weld metal, for research P92 steel weld metal microcrack mechanism provides essential condition.
The accompanying drawing explanation
Fig. 1 is the utility model application state schematic diagram;
Fig. 2 is the force application board structural representation;
1-force application board wherein; 2-bolt; 3-point of application; 4-groove; 5-test block; 6-foil gauge; 7. screw, 8-wire; 9-measuring stress instrument; 10-data wire; 11-computer, 12-angle welding.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
As shown in Figure 1 and Figure 2, simulation produces the device of P92 steel weld metal microcrack, comprise that a top has the P92 steel test block 5 of " U " type groove 4, a force application board 1 is welded respectively in the test block 5 both sides upper ends parallel with the groove center line, and test block 5 is welded angle welding 12 as shown in Figure 1 with force application board 1.Between two force application boards 1, by upper and lower two pairs of parallel and symmetrical totally four bolts 2, be connected.Foil gauge 6 is posted in the bottom of test block 5, and foil gauge 6 is connected with measuring stress instrument 9 by wire 8, and measuring stress instrument 9 is connected with computer 11 by data wire 10.Be equipped with between 7, two force application boards 1 of four screws and be connected through corresponding screw 7 by four bolts 2 on every force application board 1.
The utility model when application, first process 2 force application boards 1, force application board 1 material is Mayari, specification is 400mm * 200mm * (40mm-60mm); Bore 4 screws 7 at force application board 1 again.4 of heat-resisting alloy steel set bolts, specification is M30 * 150.1 of measuring stress instrument, high temperature strain foil several pieces, one of notebook computer, for quantitative test stress application value.Processing " U " type groove 4 above P92 steel test block 5.Force application board 1 is welded in to test block 5, foil gauge 6 is pasted in test block 5 bottoms, at first will near the pair of bolts 2 of test block 5, be fixed on force application board 1, then force application board 1 is applied to top power in opposite directions, by measuring stress instrument 9 test stresses, test block bottom is produced after certain compression numerical value by the fixing applied stress of the pair of bolts of bottom, and the point of application 3 as shown in Figure 1.By existing welding procedure, welding test block 5 under the constraint stress condition.The polishing face of weld, utilize phase resonance, TOFD or ultrasonic method to detect the weld seam underbead crack, cutting crackle place section, quantity, form and the size of observing crackle.
Although above-mentioned, by reference to the accompanying drawings the specific embodiment of the present utility model is described; but be not the restriction to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay creative work and can make various modifications or be out of shape still in protection domain of the present utility model.
Claims (3)
1. simulate the device that produces P92 steel weld metal microcrack for one kind, it is characterized in that, comprise that a top has the P92 steel test block of " U " type groove, a force application board is welded respectively in the test block both sides upper end parallel with the groove center line, between two force application boards, by some bolts, is connected.
2. device as claimed in claim 1, is characterized in that, foil gauge is posted in the bottom of described test block, and foil gauge is connected with measuring stress instrument by wire, and measuring stress instrument is connected with computer.
3. device as claimed in claim 1, it is characterized in that, be equipped with four parallel and symmetrical screws of two rows on described every force application board, between two force application boards, by four bolts, through corresponding screw, be connected, wherein two bolts of upper row are fixedly connected on force application board, and two bolts of lower row are movably connected on force application board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220702290 CN202934253U (en) | 2012-12-18 | 2012-12-18 | Device for simulating production of P92 steel weld joint metal microcracks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220702290 CN202934253U (en) | 2012-12-18 | 2012-12-18 | Device for simulating production of P92 steel weld joint metal microcracks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202934253U true CN202934253U (en) | 2013-05-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220702290 Expired - Fee Related CN202934253U (en) | 2012-12-18 | 2012-12-18 | Device for simulating production of P92 steel weld joint metal microcracks |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202934253U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713762A (en) * | 2015-03-17 | 2015-06-17 | 西安交通大学 | Preparation method of simulation stress corrosion cracks for eddy current testing |
-
2012
- 2012-12-18 CN CN 201220702290 patent/CN202934253U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713762A (en) * | 2015-03-17 | 2015-06-17 | 西安交通大学 | Preparation method of simulation stress corrosion cracks for eddy current testing |
| CN104713762B (en) * | 2015-03-17 | 2017-06-20 | 西安交通大学 | A kind of EDDY CURRENT preparation method for simulating stress corrosion cracking (SCC) |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 Termination date: 20181218 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |