CN102787229A - Method for manufacturing nickel-molybdenum alloy seal head - Google Patents
Method for manufacturing nickel-molybdenum alloy seal head Download PDFInfo
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- CN102787229A CN102787229A CN2012102993715A CN201210299371A CN102787229A CN 102787229 A CN102787229 A CN 102787229A CN 2012102993715 A CN2012102993715 A CN 2012102993715A CN 201210299371 A CN201210299371 A CN 201210299371A CN 102787229 A CN102787229 A CN 102787229A
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Abstract
The invention relates to a method for manufacturing nickel-molybdenum alloy seal head. Technological conditions in the pressing process include that an empty furnace is heated to reach the temperature of 1000+/-80 DEG C, a seal head disk enters the furnace at the temperature higher than or equal to 850 DEG C, the seal head disk is heated to reach the temperature of 1065+/-15 DEG C along with the furnace after entering the furnace, the temperature is kept for 20-30min, and then the seal head disk is tapped off and is pressed at least twice while the seal head disk is hot. Technological conditions for solid solution of the pressed seal head includes that the empty furnace is heated to reach the temperature of 1000+/-80 DEG C, the seal head and a seal head anti-deformation tool enter the furnace after being fixed at the temperature higher than or equal to 850 DEG C, the seal head is heated to reach the solid solution temperature of 1065+/-15 DEG C along with the furnace after entering the furnace, and the seal head is tapped off and rapidly water-cooled after the temperature is kept for 30-45min, so that the high-strength nickel-molybdenum alloy seal head is obtained.
Description
Technical field
The present invention relates toThe nickel molybdenum closes
Make the method and the product of end socket,Especially the manufacture craft of end socket.
Background technology
Nickel-molybdenum alloy (it is typical in U.S.'s Chinese gloomy (HAYNES) HASTELLOY B-3 of company (N10675) nickel-molybdenum alloy material,, it all has fabulous erosion resistance for the hydrochloric acid of any temperature and concentration.It also has for sulfuric acid, acetic acid, acetate, formic acid, phosphoric acid and other media that does not have oxidisability good erosion resistance is arranged simultaneously.And because its chemical ingredients has been done adjustment, its thermostability has had significantly raising than original HASTELLOY B-2 (N10665) alloy.B3 (N10675) alloy all has very high drag to corrosion of the heat affected zone of pitting attack, stress corrosion crack, knife line attack and welding etc.
Because the good antiacid characteristic that B3 (N10675) has; So obtain a large amount of coming into operation in recent years in the international market; Recent years, this material also obtained number of applications in China's relieving haperacidity industry; Like the flash tank of acetic acid industry, the extraction tower of organic acid acid industry etc. all is the pure material B3 chemical plant that relatively maximizes.End socket is one of main pressurized element wherein in chemical production equipment, in the making processes of end socket, modal be in the course of processing weld seam, plate face particularly the straight section part of end socket crackle appears easily.It is bigger that difficulty appears reprocessing behind the crackle in the B3 material, causes thermal crack in the reconditioning process of patch weld easily, or even cause original crack to extend, and to the stage that can't reprocess, often can only do and scrap processing.
Summary of the invention
The present invention seeks to: the making method of a nickel-molybdenum alloy end socket is proposed,For solve nickel-molybdenum alloy especially HS B3 (N10675) nickel-molybdenum alloy series end socket in making processes, be easy to generate the problem of crackle, the invention provides the especially production program of B3 alloy series end socket of a kind of nickel-molybdenum alloy.
Technical scheme of the present invention is: the making method of nickel-molybdenum alloy end socket, and suppressing earlier is thermoforming, the processing condition that pressing process possesses: empty stove is warmed up to 1000 ± 80 ℃; The end socket plectane is gone into stove; Guarantee end socket plectane charging temperature >=850 ℃, be heated to 1065 ℃ ± 15 ℃ with stove, (the compacting while hot of coming out of the stove after 20～30min) of insulation certain hour after going into stove; Suppress number of times >=2 time while hot; At any time measure the end socket temperature in the pressing process, when temperature is lower than 900 ℃, go into the stove heating again, the final pressure temperature must not be lower than 900 ℃.Must clear up die surface before the compacting, and the mould of end socket is carried out suitable preheating, preheating temperature is advisable for about 150 ± 30 ℃; Carry out solution treatment after the thermoforming once more; End socket after the compacting carries out the processing condition of solid solution: empty stove is warmed up to 1000 ± 80 ℃; The anti-modification frock of end socket and end socket is fed to boiler fixedly; Guarantee end socket charging temperature >=850 ℃, be heated to 1065 ℃ ± 15 ℃ of solid solubility temperatures with stove, insulation certain hour (the rapid water-cooled of coming out of the stove after 30 ~ 45min) after going into stove.
Solution treatment is that end socket compacting back adopts heat treated mode to recover the original intergranular structure structure of material to recover its original mechanical performance and chemical property.Thermal treatment fusing head plate surface must be cleaned out, and PT, RT detect qualified.Solution treatment adopts sealing property to carry out in electricity or the combustion gas heat treatment furnace preferably, in the stove any 2 temperature difference must not >=10 ℃, the tank that solution treatment is used is wanted closely with the heat treatment furnace distance; Confirm that according to the difference of head plate thickness and specification the length of soaking time in the solid solution process, the end socket back of coming out of the stove adopts water-cooled rapidly.
Further, carrying out radial finishing polish before the employing end socket is pressed handles.
The invention has the beneficial effects as follows: end socket adopts heating for multiple times repeatedly to suppress; And the manufacture craft of carrying out solution treatment under the state of end socket compacting rear head and the anti-modification of the suitable constraint of frock; Solved HS nickel-molybdenum alloy B3 series end socket is easy to generate crackle in making processes problem fully, and other mechanical property, chemical property are all unaffected.Solution treatment is in order to make various fully dissolvings mutually in the alloy, to strengthen sosoloid, improve plasticity, toughness and the corrosion resistance of sheet material, eliminate stress and softening material, playing so that carry out the following process step behind the seal head molding.The making method of HS nickel-molybdenum alloy end socket of the present invention: adopt head plate preheat-hot pressing-moulding after the technology of solid solution-recalibration type, guarantee the quality of production and the use properties of B3 end socket.
Heat treatment furnace is necessary for sealing property electric furnace or gas furnace preferably, and between the heat treatment furnace, press and the distance between the solid solution tank want near, prevent the low excessively sensitization phenomenon that causes of head plate temperature in pressing process.Eliminate the various defectives that cause in the course of processing through solution treatment, eliminate stress, make alloy generation recrystallize,, guarantee the quality of production and the use properties of end socket with the grain fineness number that obtains to suit.
Description of drawings
Fig. 1 is the end socket solid solution temperature of HS nickel-molybdenum alloy B3 (N10675) series alloy---time curve (thermal treatment process of solution treatment).
Embodiment
Below in conjunction with Fig. 1 the specific embodiment of the invention is described.The t1 end socket is gone into the empty stove in stokehold heat-up time among Fig. 1; The t2 end socket was gone into behind the stove with stove heat-up time; T3 end socket soaking time in stove; Cooling time in the water after the t4 end socket is come out of the stove.
B3 (N10675) end socket is after the starting material reinspection is qualified; Carry out blanking by the processing requirement size, need the head plate of splicing to splice by processing requirement, various parameters and detection requirement must be satisfied processing requirement; Splicing is smoothed processing to the end socket plectane after accomplishing; Roughness≤3mm/m, and splicing welding joint and plate surface are carried out 100%PT detect, the acceptance test of JB/T4730-2005 I level pressed; The end socket splicing welding joint is carried out 100%RT detect, press the acceptance test of JB/T4730-2005 II level.After nondestructive testing is qualified, splicing welding joint is polished, polishing back weld reinforcement guarantees that at 0.5 ~ 1mm end socket compacting back weld seam is concordant with mother metal.Radial mechanical polishing is carried out in zone beyond the two-sided 0.8 times of diameter of end socket plectane, and the polishing progress reaches 8 order requirements, and remove the surface all scrape, scratch; Again end socket plectane side face is fallen the fillet of R=3～5.The acceptance test of JB/T4730-2005 I level is pressed the positive and negative surface of end socket plectane being carried out the 100%PT detection in the polishing back.
The concrete drawing method of the serial end socket of B3 (N10675): in B3 series end socket pressing process; Adopt head plate preheat-hot pressing-moulding after the technology of solid solution-recalibration type, guarantee the quality of production and the use properties of B3 end socket: preheating is that the end socket plectane is heated to 1065 ℃ ± 15 ℃ by heat treatment cycle curve; Hot pressing is the pattern compression moulding (the end socket temperature is reduced to below 900 ℃ in like pressing process, and then head plate answers the loop to carry out second-heating) of the end socket plectane being adopted end socket mold pressing in 900 ℃ of-1065 ℃ of scopes; After the moulding solution treatment be with the end socket after the compression moulding by heat treatment cycle curve heating and cooling to recover, to improve the manufacture craft of starting material mechanical property and use properties.Should the surface-conditioning of B3 end socket is clean before heating and the solid solution, before the compacting die surface is cleared up and preheated.Heating and solid solution should be carried out in electric heating and the gas furnace in sealing property preferably.Plectane plate face before the B3 end socket compacting cleared up by processing requirement detect; It is to be heated to detect qualified back etc.; The empty stove of heat treatment furnace is heated to 1000 ℃ in addition; Open fire door head plate is put into the heat treatment furnace internal heating, be heated to 1065 ℃ ± 15 ℃ by processing requirement insulation certain hour, the hot pressing of coming out of the stove fast.For the quick loss with heat that weighs wounded of mould in the overheated and pressing process that prevents end socket surface in heat-processed, can go into positive and negative surface, stokehold at the end socket plectane and cover the stainless steel sheet of δ 2 outside dimensions such as grade and protect.After the compression moulding; The positive and negative surface of the whole solution treatment fusing head of end socket also need be cleared up by processing requirement and detect; Detect and the anti-modification frock of end socket and end socket is fixed after qualified, and, treat to carry out solution heat treatment after the coating drying end socket tow sides brushing high-temperature resistant coating.The empty stove of heat treatment furnace is heated to 1000 ℃, opens fire door end socket and anti-modification frock integral body are put into the heat treatment furnace internal heating, is heated to 1065 ℃ ± 15 ℃ by processing requirement insulation certain hour, the water-cooled of coming out of the stove fast.The water coolant that solution treatment is used in the tank must be clean, by processing requirement water quality is detected before the solution treatment.Water must stir in the solid solution process; Scorching hot end socket surface is contacted the steam film that forms breaks up with water; Guaranteeing that water coolant can contact with end socket fully, is that end socket can drop to (assurance B3 end socket can pass through 590 ℃～820 ℃ in its sensitization zone fast) below 250 ℃ from 1065 ℃ rapidly in 2～3 minutes.Cleaning end socket in cooling back detects by processing requirement.Quality by the serial end socket of the B3 (N10675) of above technology making has remarkable difference.
The plectane splicing is accomplished the back end socket plectane is smoothed processing before the end socket compacting, roughness≤3mm/m, and splicing welding joint and plate surface carried out the 100%PT detection, press the acceptance test of JB/T4730-2005 I level; The end socket splicing welding joint is carried out 100%RT detect, press the acceptance test of JB/T4730-2005 II level.After nondestructive testing is qualified, splicing welding joint is polished, polishing back weld reinforcement guarantees that at 0.5 ~ 1mm end socket compacting back weld seam is concordant with mother metal.
Radial mechanical polishing is carried out in zone beyond the two-sided 0.8 times of diameter of end socket plectane, and the polishing progress reaches 8 order requirements, and remove the surface all scrape, scratch; Again end socket plectane side face is fallen the fillet of R=3～5.The acceptance test of JB/T4730-2005 I level is pressed the positive and negative surface of end socket plectane being carried out the 100%PT detection in the polishing back.
Adopt the end socket of the manufacture craft processing of the serial end socket of this B3 (N10675), press JB/T4730-2005 surperficial 100%PT is detected, butt welded seam carries out the 100%RT lossless detection method, and crackle is not found on the end socket surface, has guaranteed the total quality of B3 series end socket.
In B3 series end socket pressing process, adopt head plate preheat-hot pressing-moulding after the technology of solid solution-recalibration type, guarantee the quality of production and the use properties of B3 end socket: preheating is that the end socket plectane is heated to 1065 ℃ ± 15 ℃ by heat treatment cycle curve; Hot pressing is the pattern compression moulding of the end socket plectane being adopted end socket mold pressing in 900 ℃ of-1065 ℃ of scopes; After the moulding solution treatment be with the end socket after the compression moulding by heat treatment cycle curve heating and cooling to recover, to improve the manufacture craft of starting material mechanical property and use properties.Heating and solution treatment should be carried out in electric furnace or the gas furnace in sealing property preferably.The complete processing of B3 series end socket is applicable to the end socket of identical or close material different thickness different size, confirms soaking time according to the difference of material specification.Above complete processing comprises but is not limited only to ellipse, sphere, conical head.
Solution treatment adopts sealing property to carry out in electricity or the combustion gas heat treatment furnace preferably, and press is wanted closely with the heat treatment furnace distance; Confirm that according to the difference of head plate thickness and specification the length of soaking time in the solid solution process, the end socket back of coming out of the stove adopts water-cooled rapidly.
The water coolant that solution treatment is used in the tank must be clean, by processing requirement water quality is detected before the solution treatment.Water must stir in the solid solution process; Scorching hot end socket surface is contacted the steam film that forms breaks up with water; Guaranteeing that water coolant can contact with end socket fully, is that end socket can drop to (assurance B3 end socket can pass through 590 ℃～820 ℃ in its sensitization zone fast) below 250 ℃ from 1065 ℃ rapidly in 2～3 minutes.
Claims (5)
1. the making method of nickel-molybdenum alloy end socket, it is characterized in that suppressing earlier is thermoforming, the processing condition that pressing process possesses: empty stove is warmed up to 1000 ± 80 ℃; The end socket plectane is gone into stove; Guarantee end socket plectane charging temperature >=850 ℃, be heated to 1065 ℃ ± 15 ℃ with stove, the compacting while hot of coming out of the stove behind soaking time 20～30min after going into stove; Suppress number of times >=2 time while hot; At any time measure the end socket temperature in the pressing process, when temperature is lower than 900 ℃, go into the stove heating again, the final pressure temperature must not be lower than 900 ℃; Must clear up die surface before the compacting, and the mould of end socket is carried out suitable preheating, preheating temperature is advisable for about 150 ± 30 ℃; Carry out solution treatment after the thermoforming once more; End socket after the compacting carries out the processing condition of solid solution: empty stove is warmed up to 1000 ± 80 ℃; The anti-modification frock of end socket and end socket is fed to boiler fixedly; Guarantee end socket charging temperature >=850 ℃, be heated to 1065 ℃ ± 15 ℃ of solid solubility temperatures with stove, the rapid water-cooled of coming out of the stove behind soaking time 30 ~ 45min after going into stove.
2. the making method of nickel-molybdenum alloy end socket according to claim 1 is characterized in that solution treatment adopts sealing property electricity or combustion gas heat treatment furnace preferably, and any 2 temperature difference is not >=10 ℃ in the stove.
3. the making method of nickel-molybdenum alloy end socket according to claim 1, radial mechanical polishing is carried out in the zone before it is characterized in that adopting end socket to press beyond the two-sided 0.8 times of diameter of end socket plectane,
The making method of nickel-molybdenum alloy end socket according to claim 1 is characterized in that the back is accomplished in the plectane splicing before the end socket compacting end socket plectane is smoothed processing, roughness≤3mm/m, and splicing welding joint and plate surface carried out the 100%PT detection; The end socket splicing welding joint is carried out 100%RT detect, splicing welding joint is polished, polishing back weld reinforcement is at 0.5 ~ 1mm.
4. the making method of nickel-molybdenum alloy end socket according to claim 1 and 2 it is characterized in that solution treatment adopts sealing property to carry out in electricity or the combustion gas heat treatment furnace preferably, and press is wanted closely with the heat treatment furnace distance; Confirm that according to the difference of head plate thickness and specification the length of soaking time in the solid solution process, the end socket back of coming out of the stove adopts water-cooled rapidly.
5. the making method of nickel-molybdenum alloy end socket according to claim 1 and 2 is characterized in that the water coolant that solution treatment is used is clean; Water must stir in the solid solution process, scorching hot end socket surface is contacted the steam film that forms break up with water, guarantees that water coolant contacts with end socket fully, and end socket dropped to below 250 ℃ from 1065 ℃ in 2～3 minutes.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104786012A (en) * | 2014-01-21 | 2015-07-22 | 无锡市前洲西塘锻压有限公司 | Manufacturing method for nichrome end sockets |
| CN104786011A (en) * | 2014-01-21 | 2015-07-22 | 无锡市前洲西塘锻压有限公司 | Manufacturing method for nickel-copper end sockets |
| CN106001233A (en) * | 2016-06-24 | 2016-10-12 | 茂名重力石化机械制造有限公司 | Head sealing method for hot-press formed reactor, blank subjected to method and reactor with head manufactured through method |
| CN106086737A (en) * | 2016-06-16 | 2016-11-09 | 南京三邦新材料科技有限公司 | A kind of manufacture method of bellows expansion joint |
| CN106140925A (en) * | 2016-06-24 | 2016-11-23 | 茂名重力石化机械制造有限公司 | Hot-forming reactor end enclosure method, the blank being applied to the method and employing the method shaping reactor end socket |
| CN109827444A (en) * | 2019-01-23 | 2019-05-31 | 深圳市能佳自动化设备有限公司 | A kind of control method, device and the computer readable storage medium of Multi-layer warming furnace |
| CN115139065A (en) * | 2022-08-17 | 2022-10-04 | 新疆兰石重装能源工程有限公司 | Method for punch forming of nickel-based alloy seal head |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104786012A (en) * | 2014-01-21 | 2015-07-22 | 无锡市前洲西塘锻压有限公司 | Manufacturing method for nichrome end sockets |
| CN104786011A (en) * | 2014-01-21 | 2015-07-22 | 无锡市前洲西塘锻压有限公司 | Manufacturing method for nickel-copper end sockets |
| CN106086737A (en) * | 2016-06-16 | 2016-11-09 | 南京三邦新材料科技有限公司 | A kind of manufacture method of bellows expansion joint |
| CN106001233A (en) * | 2016-06-24 | 2016-10-12 | 茂名重力石化机械制造有限公司 | Head sealing method for hot-press formed reactor, blank subjected to method and reactor with head manufactured through method |
| CN106140925A (en) * | 2016-06-24 | 2016-11-23 | 茂名重力石化机械制造有限公司 | Hot-forming reactor end enclosure method, the blank being applied to the method and employing the method shaping reactor end socket |
| CN109827444A (en) * | 2019-01-23 | 2019-05-31 | 深圳市能佳自动化设备有限公司 | A kind of control method, device and the computer readable storage medium of Multi-layer warming furnace |
| CN115139065A (en) * | 2022-08-17 | 2022-10-04 | 新疆兰石重装能源工程有限公司 | Method for punch forming of nickel-based alloy seal head |
| CN115139065B (en) * | 2022-08-17 | 2023-10-20 | 新疆兰石重装能源工程有限公司 | Nickel base alloy end socket stamping forming method |
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Application publication date: 20121121 |