CN111207977A - Repair method for eliminating clutter generated by high-temperature alloy during ultrasonic flaw detection - Google Patents

Repair method for eliminating clutter generated by high-temperature alloy during ultrasonic flaw detection Download PDF

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Publication number
CN111207977A
CN111207977A CN202010124789.7A CN202010124789A CN111207977A CN 111207977 A CN111207977 A CN 111207977A CN 202010124789 A CN202010124789 A CN 202010124789A CN 111207977 A CN111207977 A CN 111207977A
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CN
China
Prior art keywords
repair method
forging
die
during ultrasonic
mold
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Pending
Application number
CN202010124789.7A
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Chinese (zh)
Inventor
王骏
刘智
陈翠
刘其源
吴玉超
许志成
孙柯
艾志斌
蒋小飞
何方有
万志超
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Wuxi Paike New Material Technology Co ltd
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Wuxi Paike New Material Technology Co ltd
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Priority to CN202010124789.7A priority Critical patent/CN111207977A/en
Publication of CN111207977A publication Critical patent/CN111207977A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/28Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/28Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/36Embedding or analogous mounting of samples
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/28Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/42Low-temperature sample treatment, e.g. cryofixation
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/28Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/44Sample treatment involving radiation, e.g. heat
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04Analysing solids
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/28Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/36Embedding or analogous mounting of samples
    • G01N2001/366Moulds; Demoulding
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/02Indexing codes associated with the analysed material
    • G01N2291/023Solids
    • G01N2291/0234Metals, e.g. steel
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/02Indexing codes associated with the analysed material
    • G01N2291/028Material parameters
    • G01N2291/0289Internal structure, e.g. defects, grain size, texture

Abstract

The invention discloses a repair method for eliminating clutter generated by high-temperature alloy during ultrasonic flaw detection, which belongs to the field of alloy repair methods and adopts the technical scheme that the repair method comprises the following steps: s1, heating: heating the coarse-grained forging to a solid solution temperature, and then preserving heat of the forging; s2, preparing a die: preheating the die, and then keeping the temperature of the die for a period of time to prevent the die from rapidly cooling when in contact with the forge piece to cause the forge piece to crack; s3, bulging: transferring the forge piece into an expanding machine, then sleeving the forge piece into a mold, flatting the mold, starting the expanding machine, enabling a pressing mold to move downwards to drive the mold to move along the radial direction, enabling the outer diameter of the forge piece to extend outwards, and thinning the wall thickness of the ring piece; s4, pressure maintaining: stopping when the mould moves to the position, and keeping the pressure for a period of time; s5, cooling: the method has the advantages that the forge piece is repaired without multiple solid solution, and the quality and the stability of the repaired product are improved.

Description

Repair method for eliminating clutter generated by high-temperature alloy during ultrasonic flaw detection
Technical Field
The invention relates to an alloy repairing method, in particular to a method for eliminating clutter of ultrasonic flaw detection of a high-temperature alloy.
Background
Nondestructive inspection is a test means for inspecting the surface and internal quality of a part to be inspected without damaging the work state of the workpiece or the raw material. The nondestructive inspection is to detect whether there is a defect or non-uniformity in an object to be inspected by using the characteristics of a substance such as sound, light, magnetism and electricity without damaging or affecting the use performance of the object to be inspected, and give information such as the size, position, property and quantity of the defect.
Common nondestructive inspection methods include: x-ray inspection, ultrasonic inspection, magnetic particle inspection, penetrant inspection, eddy current inspection, gamma-ray inspection, fluorescent inspection, dye-sensitized inspection, and the like. The ultrasonic flaw detection is a common flaw detection method and has the following principle: when ultrasonic waves propagate in a detected material, the acoustic characteristics of the material and the change of internal tissues have certain influence on the propagation of the ultrasonic waves, and the technology of knowing the material performance and structural change by detecting the influence degree and condition of the ultrasonic waves is called ultrasonic detection.
At present, a GH4698 alloy is generally detected by using an ultrasonic flaw detection mode, and when the quality of the GH4698 alloy is unqualified, noise waves are generated in a forging of the GH4698 alloy, which indicates that the forging is unqualified. Generally, an unqualified GH4698 alloy forging piece is re-dissolved, then the original process is installed for re-forging and re-solid solution, so that various components and alloy phases melt austenite grains, and the shape difference of various alloy phases on a grain boundary is eliminated. However, in the original process, the process of solid solution is carried out for many times, the hardness of the product is reduced after the forge piece is subjected to solid solution for many times, and the stability of the product is not facilitated during batch production, so that the tissue production is difficult.
Disclosure of Invention
The invention aims to provide a repairing method for eliminating clutter generated by high-temperature alloy during ultrasonic flaw detection, which has the advantages that a forge piece is repaired without multiple solid solution, and the quality and the stability of a repaired product are improved.
The technical purpose of the invention is realized by the following technical scheme:
a restoration method for eliminating clutter generated by high-temperature alloy during ultrasonic flaw detection comprises the following steps:
s1, heating: heating the coarse-grained forging to a solid solution temperature, and then preserving heat of the forging;
s2, preparing a die: a worker preheats the die, and then the die is kept warm for a period of time to prevent the die from being quenched when in contact with the forged piece to cause the forged piece to crack;
s3, bulging: transferring the forge piece into an expanding machine, then sleeving the forge piece into a mold, flatting the mold, starting the expanding machine, enabling a pressing mold to move downwards to drive the mold to move along the radial direction, enabling the outer diameter of the forge piece to extend outwards, and thinning the wall thickness of the ring piece;
s4, pressure maintaining: stopping when the mould moves to the position, and keeping the pressure for a period of time;
s5, cooling: and covering a heat-insulating material on the forge piece during pressure maintaining to prevent stress generated by too fast cooling.
Further, in step S1, the solid solubility temperature range is-30 to +50 ℃ above and below the standard solid solubility temperature based on the solid solubility temperature of the alloy in step S1.
Further, in step S1, the heat preservation time range is 90min-120 min.
Further, in step S2, the preheating temperature range is 120 to 150 ℃.
Further, in step S2, the heat preservation time is not less than 8-12 h.
Further, in step S3, the forging is transferred to the expanding machine within 60S after the preheating is completed.
Further, in step S4, the pressure is maintained for a period of time ≧ 12 h.
Further, in step S4, after the cooling of the forging is completed, all visible light surfaces of the forging are subjected to ultrasonic detection.
In conclusion, the invention has the following beneficial effects:
1. when unqualified forgings are detected, the forgings are repaired in an integral expansion mode, the problem of nonuniform flaw detection of the forgings is solved, the inner hole and the outer hole of the forgings are enlarged and the wall thickness of the forgings is reduced in the expansion process of the forgings, so that the crystal preferred orientation and the tissue fibers tend to be consistent, and the morphological difference of various alloy phases of the forgings is eliminated;
2. the forged piece is not required to be repaired through multiple solid solution, the situation that the hardness of the forged piece is reduced due to multiple solid solution is avoided, and the quality and the stability of a repaired product are improved.
Drawings
FIG. 1 is a schematic flow diagram of a repair method for eliminating clutter generated by superalloys during ultrasonic inspection;
FIG. 2 is a schematic view of a forging placed on a mold.
In the figure, 1, a mold is pressed; 2. a mold; 3. forging; .
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Example (b): a repairing method for eliminating clutter generated by a superalloy during ultrasonic flaw detection, as shown in fig. 1, comprising the following steps:
s1, heating: heating the coarse-grained forging 3 to a solid solution temperature, wherein the solid solution temperature range is based on the solid solution temperature of the alloy, the temperature is fluctuated from minus 30 ℃ to plus 50 ℃ at the standard solid solution temperature, and the heating time is 90-120 min. And (4) converting the forged piece 3 into solid solution again, and further dissolving various alloy phases in the forged piece 3 again.
And then preserving the heat of the forged piece 3, wherein the heat preservation time is 90-120 min consistent with the solid solution heat preservation time. The heat preservation is to ensure that the alloy structure of the forging 3 is fully transformed into a solid solution state.
S2, preparation of mold 2: a worker preheats the die 2, the preheating temperature range is 120-150 ℃, then the die 2 is kept warm for a period of time, the warm-keeping time is more than or equal to 8-12 h, and the situation that the die 3 is rapidly cooled when the die is in contact with the forging 3 to cause cracking of the forging 3 is avoided.
S3, bulging: as shown in fig. 2, after the heat preservation of the die 2 is completed, the forged piece 3 is transferred to an expanding machine within 60S, the forged piece 3 is sleeved into the die 2 and is laid flat, an inner hole of the forged piece 3 is in contact with the expanding die 2, the height of the expanding die 2 is higher than that of the forged piece 3, the expanding machine is started, the pressing die 1 moves downwards along the vertical direction, the die 2 is driven to expand outwards along the radial direction, the ring forged piece 3 is driven to extend outwards along the outer diameter, and the wall thickness of the ring piece is thinned.
The thinning amount of the forged piece 3 is calculated according to 1.8-2% of the wall thickness, and the formula delta is (T0-T1)/T0, wherein delta: the amount of deformation; t0: wall thickness of the ring before bulging; t1: and the wall thickness of the ring is thick after the ring is expanded.
In the bulging process, due to the pressure effect, the alloy structure of the forge piece 3 which is not solidified can be deformed, so that the crystal is preferentially oriented, and the crystal structure is more uniform.
S4, pressure maintaining: when the mould 2 moves to the right position, the compaction mould 1 stops moving, and the pressure is kept for a period of time, wherein the time for keeping the pressure is more than or equal to 12 h. Before the forging 3 is cooled, the pressure needs to be kept, and the texture fibers of the forging 3 tend to be consistent.
S5, cooling: and covering a heat insulation material on the forging 3 during pressure maintaining, wherein the heat insulation material is preferably made of heat insulation cotton so as to prevent stress generated by too fast cooling. The change of temperature is noticed in the process of pressure maintaining, and the condition of rapid temperature change is avoided, so that the condition that the forging 3 is broken due to supercooling is prevented.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims (8)

1. A restoration method for eliminating clutter generated by high-temperature alloy during ultrasonic flaw detection is characterized by comprising the following steps: the method comprises the following steps:
s1, heating: heating the coarse-grained forging (3) to a solid solution temperature, and then preserving heat of the forging (3);
s2, preparing a die (2): a worker preheats the die (2), and then the die (2) is kept warm for a period of time to prevent the die from rapidly cooling when contacting with the forge piece (3) to cause the forge piece (3) to crack;
s3, bulging: transferring the forging (3) into a bulging machine, sleeving the forging (3) into a mold (2), flatting the mold (2), starting the bulging machine, moving the pressing mold (1) downwards to drive the mold (2) to move along the radial direction, extending the outer diameter of the forging (3) outwards, and thinning the wall thickness of the ring piece;
s4, pressure maintaining: stopping when the mould (2) moves to the position and keeping the pressure for a period of time;
s5, cooling: and covering the forge piece (3) with a heat insulation material during pressure maintaining to prevent stress generated by too fast cooling.
2. The repair method for eliminating clutter generated by a superalloy during ultrasonic testing according to claim 1, wherein the repair method comprises: in step S1, the solid solubility temperature range is-30 to +50 ℃ above and below the standard solid solubility temperature, based on the solid solubility temperature of the alloy.
3. The repair method for eliminating clutter generated by a superalloy during ultrasonic testing according to claim 1, wherein the repair method comprises: in step S1, the heat preservation time is 90min-120 min.
4. The repair method for eliminating clutter generated by a superalloy during ultrasonic testing according to claim 1, wherein the repair method comprises: in step S2, the preheating temperature range is 120 to 150 ℃.
5. The repair method for eliminating clutter generated by a superalloy during ultrasonic testing according to claim 1, wherein the repair method comprises: in step S2, the heat preservation time is not less than 8-12 h.
6. The repair method for eliminating clutter generated by a superalloy during ultrasonic testing according to claim 1, wherein the repair method comprises: in step S3, the forging (3) is transferred to the expander within 60S after the preheating is completed.
7. The repair method for eliminating clutter generated by a superalloy during ultrasonic testing according to claim 1, wherein the repair method comprises: in step S4, the pressure is maintained for a time period of 12h or more.
8. The repair method for eliminating clutter generated by a superalloy during ultrasonic testing according to claim 1, wherein the repair method comprises: in step S4, after the cooling of the forging (3) is completed, all visible light surfaces of the forging (3) are subjected to ultrasonic detection.
CN202010124789.7A 2020-02-27 2020-02-27 Repair method for eliminating clutter generated by high-temperature alloy during ultrasonic flaw detection Pending CN111207977A (en)

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CN107282854A (en) * 2017-08-11 2017-10-24 烟台台海玛努尔核电设备有限公司 A kind of manufacturing process of nuclear power retaining ring
CN108555223A (en) * 2017-12-13 2018-09-21 陕西宏远航空锻造有限责任公司 A kind of GH901 alloys diskware manufacturing method
CN109811117A (en) * 2019-04-11 2019-05-28 无锡派克新材料科技股份有限公司 A kind of high temperature alloy crystal grain ultrasonic wave water logging homogenization method

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