CN103614632B - A kind of manufacture method of sub-sea drilled wells valve base - Google Patents
A kind of manufacture method of sub-sea drilled wells valve base Download PDFInfo
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- CN103614632B CN103614632B CN201310663728.8A CN201310663728A CN103614632B CN 103614632 B CN103614632 B CN 103614632B CN 201310663728 A CN201310663728 A CN 201310663728A CN 103614632 B CN103614632 B CN 103614632B
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Abstract
The invention discloses a kind of manufacture method of sub-sea drilled wells valve base, chrome molybdenum low alloy steel is selected to be blank, the mass percent composition of chrome molybdenum low alloy steel is: carbon: 0.3%-0.32%, silicon: 0.18%-0.36%, manganese: 0.50%-0.70%, chromium: 0.90%-1.10%, molybdenum: 0.20%-0.30%, phosphorus: 0-0.02%, sulphur: 0-0.025%, hydrogen: 0-1.8ppm, nickel: 0-0.40%, vanadium: 0-0.03%, copper: 0-0.30%, 0-0.9% residual element, and all the other are Fe; The manufacture method of a kind of sub-sea drilled wells valve base designed by the present invention can improve resistance to pressure, the toughness of valve block, and can prevent chromium coating from coming off.
Description
Technical field
The present invention relates to a kind of manufacture method of sub-sea drilled wells valve base.
Background technology
Deep-sea is recovered the oil very harsh for the requirement of environment, because being rich in mud, and H
2s and CO
2gas, and operating pressure to be 35MPa ~ 69MPa even higher, temperature is minimum reaches subzero 50 degrees Celsius, although use AISI4130(MOD) material, but the deep-sea valve seat produced with the forge piece manufacturing process of routine, not only technique and difficult quality meet, and low-temperature flexibility is also difficult to meet, and cannot be applicable to harsh environment.
Chromium is a kind of micro-bluish silvery white metal, relative atomic mass 51.99, density 6.98 ~ 7.21g/cm3, fusing point is 1875 ~ 1920 DEG C, chromium metal is very easily passivation in atmosphere, and surface forms the very thin passive film of one deck, thus demonstrates the character of precious metal.Chromium coating has very high hardness, different with processing condition according to solution composition, and its hardness can change in 400 ~ 1200HV very on a large scale.Chromium coating has good thermotolerance, and heat below 500 DEG C, its glossiness, hardness have no significant change, and temperature is greater than 500 DEG C and starts oxidation stain, is greater than 700 DEG C of hardness and starts to reduce.The frictional coefficient of chromium coating is little, particularly dry friction coefficient, is minimum in all metals, so chromium coating tool has good wearability, but in prior art, after valve base chrome-faced, its chromium coating easily comes off, and chromium coating hardness is not high.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the shortcoming of prior art, provides a kind of resistance to pressure, the toughness that can improve valve block, and the manufacture method of the sub-sea drilled wells valve base that can prevent chromium coating from coming off.
In order to solve above technical problem, the invention provides a kind of manufacture method of sub-sea drilled wells valve base, chrome molybdenum low alloy steel is selected to be blank, the component concentration of chrome molybdenum low alloy steel comprises each component of following mass percent: carbon: 0.3%-0.32%, silicon: 0.18%-0.36%, manganese: 0.50%-0.70%, chromium: 0.90%-1.10%, molybdenum: 0.20%-0.30%, phosphorus: 0-0.02%, sulphur: 0-0.025%, hydrogen: 0-1.8ppm, nickel: 0-0.40%, vanadium: 0-0.03%, copper: 0-0.30%, 0-0.9% residual element, all the other are Fe, specifically comprise the steps:
Step (1): heating blank to 900 ± 20 DEG C, and by blank jumping-up vertically, air cooling to 360 DEG C is also incubated 420 minutes;
Step (2): the blank in step (1) is heated to 880 ± 10 DEG C again, and along two, the transverse section orthogonal diametric(al) upsetting pull repeatedly of blank, air cooling to 300 ± 10 DEG C insulation 180 minutes;
Step (3): to blank heating to 600 ± 15 DEG C in step (3), and extract valve base forging stock vertically, and carry out quench treatment to it, quenching process specifically comprises:
First refrigerating work procedure: adopt water-cooled with the rate of cooling of 24-26 DEG C/s by valve base forging stock water-cooled to 650-750 DEG C;
Second refrigerating work procedure: adopt water-cooled to be combined with air cooling, first adopt water-cooled with the rate of cooling of 1.5-3 DEG C/s by valve base forging stock water-cooled to 420-460 DEG C, then air cooling is to 290-320 DEG C, adopt again water-cooled with the rate of cooling of 2.5-4 DEG C/s by valve base forging stock water-cooled to 180-200 DEG C, last air cooling is to room temperature;
Step (4): chromium plating process is carried out to the valve base forging stock obtained in step (3), specifically comprises the steps:
1. sandblasting: the valve base sandblast machine shaped is carried out sandblasting, washs in the clear water of 60-70 DEG C after process;
2. etch: groove temperature: 55-57 DEG C, current density: 37-39A/dm
2, the time: 43-48s; Containing following component in often liter of etching tank liquor: chromic anhydride: 150-165g, sulphur is joined: 1.1-1.3g, trivalent chromium: 0.5-0.8g, Strontium Sulphate: 20-35g, potassium silicofluoride: 10-15g;
3. chromium plating: groove temperature: 45-50 DEG C, current density: 28-30A/dm
2, the time: 2.5-3.5h; Containing following component in often liter of chromium plating tank liquor: chromic anhydride: 165-175g, sulphur is joined: 1.5-1.8g, trivalent chromium: 0.5-0.8g, Strontium Sulphate: 25-35g, potassium silicofluoride: 20-25g has, lithium fluoride or Sodium Fluoride: 1-2g, compound rare-earth: 0.1 ~ 0.3g;
4. clean: the clear water that the valve base after chromium plating puts into 75-85 DEG C is washed, namely obtains sub-sea drilled wells valve base finished product.The technical scheme that the present invention limits further is:
Further, the manufacture method of aforesaid sub-sea drilled wells valve base, the component concentration of chrome molybdenum low alloy steel comprises each component of following mass percent, carbon: 0.3%, silicon: 0.18%, manganese: 0.50%, chromium: 0.90%, molybdenum: 0.20%, phosphorus: 0%, sulphur: 0%, hydrogen: 1.0ppm, nickel: 0%, vanadium: 0%, copper: 0-0.30%, 0-0.9% residual element, all the other are Fe.
The manufacture method of aforesaid sub-sea drilled wells valve base, chrome molybdenum low alloy steel component concentration comprise each component of following mass percent, carbon: 0.32%, silicon: 0.36%, manganese: 0.70%, chromium: 1.10%, molybdenum: 0.30%, phosphorus: 0.02%, sulphur: 0.025%, hydrogen: 1.8ppm, nickel: 0.40%, vanadium: 0.03%, copper: 0.30%, 0-0.9% residual element, all the other are Fe.
The manufacture method of aforesaid sub-sea drilled wells valve base, in step (4), compound rare-earth comprises following component by weight percentage: La:38 ~ 40%, Ce:10 ~ 13%, Y:3 ~ 4%, Sc:15 ~ 20%, Gd:6 ~ 8%, Sm:3 ~ 4%, Dy:6 ~ 8%, Pr:7 ~ 9%, above each component sum is 100%.
The invention has the beneficial effects as follows:
In the present invention, step (1) to step (3) utilizes the change of blank deformation direction many, steel ingot heart portion metal outwardly, effectively broken as cast condition dentrite tissue, inner loosening is closed in forging, hole, the defects such as crackle, improve density and the continuity of metal, facilitate the kneading of as-cast structure simultaneously, make the inside and outside tissue trend of forging evenly, alleviate the segregation journey of forging tissue, guarantee that forging is in the quenching process of Tempering and Quenching subsequently from tissue, avoid the hardening break that the quenching stress of forging tissue defects initiation is concentrated crackle or caused therefrom, strengthen complex-shaped forging opposing thermal treatment thermal stresses and structural stress go out ability,
Be added with Strontium Sulphate and potassium silicofluoride in chromium plating tank liquor of the present invention, Strontium Sulphate and potassium silicofluoride also exist resolution of precipitate balance separately, and have a solubility product constant Ksp respectively, namely as [S0 in solution
4 2-] or [SiF
6 2-] concentration increase time, corresponding ionic concn product will be greater than solubility product constant, excessive S0
4 2-or SiF
6 2-just SrS0 is generated
4or K
2siF
6precipitate and separate out; On the contrary, as [S0 in solution
4 2-] or [SiF
6 2-] concentration not enough time, the SrS0 in groove
4or K
2siF
6resolution of precipitate, till when corresponding ionic concn product equals its solubility product, so, when the temperature of plating solution and concentration one timing of chromic anhydride, [S0 in plating solution
4 2-] or [SiF
6 2-] concentration by dissolution precipitation balance and regulate automatically, not with electroplating process continue and change.Therefore, the dispersive ability of plating solution of the present invention and covering power good, the advantages such as sedimentation velocity fast (50/-m/h); The basis of above chromium plating tank liquor adds a certain amount of rare earth element and fluorion, adopt rare earth element can reduce chromic anhydride concentration, widen plating temperature scope (10 ~ 50 DEG C) and cathode current density scope (5 ~ 30A/dm
2), reduce groove pressure, improve luminance brightness and the hardness of coating, chromium plating is produced and realizes low temperature, less energy-consumption, low stain and high-level efficiency;
Water-cooled is adopted to be combined with air cooling after tempering of the present invention, be followed successively by: water-cooled-air cooling-water-cooled-air cooling, like this, controlled by the cooling after tempering, carbide can be made fully to dissolve further, even diffusion, avoiding carbide causes intergranular corrosion and spot corrosion to exceed standard in the precipitation of intergranular, ensure that the ferrite content of material is about 30%, material solid solution can be made further abundant, avoid heat treatment mode heating uneven, the erosion rate that solid solution inequality is brought exceeds standard and hardness exceeds standard, and has consolidated the technique effect smelted postheat treatment technique above and produce;
Valve base after present invention process chromium plating is carried out torsion test, and equal end finds that there is layers of chrome and comes off from valve base matrix; By hard detection, layers of chrome hardness 1150 ~ 1200HV, apparently higher than existing chromium plating valve base layers of chrome hardness; Technique of the present invention can reduce the concentration of chromic anhydride, widens plating temperature scope, and cathode current density scope, improves luminance brightness and the hardness of coating, chromium plating is produced and realizes low temperature, less energy-consumption, low stain and high-level efficiency.
Embodiment
embodiment 1
Present embodiments provide the manufacture method that the invention provides a kind of sub-sea drilled wells valve base, chrome molybdenum low alloy steel is selected to be blank, the component concentration of chrome molybdenum low alloy steel comprises each component of following mass percent: carbon: 0.3%, silicon: 0.18%, manganese: 0.50%, chromium: 0.90%, molybdenum: 0.20%, phosphorus: 0%, sulphur: 0%, hydrogen: 0ppm, nickel: 0%, vanadium: 0%, copper: 0%, 0% residual element, all the other are Fe, specifically comprise the steps:
Step (1): heating blank to 880 DEG C, and by blank jumping-up vertically, air cooling to 360 DEG C is also incubated 420 minutes;
Step (2): the blank in step (1) is heated to 870 DEG C again, and along two, the transverse section orthogonal diametric(al) upsetting pull repeatedly of blank, air cooling to 290 DEG C insulation 180 minutes;
Step (3): to the blank heating to 585 DEG C in step (3), and extract valve base forging stock vertically, and carry out quench treatment to it, quenching process specifically comprises:
First refrigerating work procedure: adopt water-cooled with the rate of cooling of 24 DEG C/s by valve base forging stock water-cooled to 650 DEG C;
Second refrigerating work procedure: adopt water-cooled to be combined with air cooling, first adopt water-cooled with the rate of cooling of 1.5 DEG C/s by valve base forging stock water-cooled to 420 DEG C, then air cooling to 290 DEG C, then adopt water-cooled with the rate of cooling of 2.5 DEG C/s by valve base forging stock water-cooled to 180 DEG C, last air cooling is to room temperature;
Step (4): chromium plating process is carried out to the valve base forging stock obtained in step (3), specifically comprises the steps:
1. sandblasting: the valve base sandblast machine shaped is carried out sandblasting, washs in the clear water of 60-70 DEG C after process;
2. etch: groove temperature: 55 DEG C, current density: 37A/dm
2, the time: 43s; Containing following component in often liter of etching tank liquor: chromic anhydride: 150g, sulphur is joined: 1.1g, trivalent chromium: 0.5g, Strontium Sulphate: 20g, potassium silicofluoride: 10g;
3. chromium plating: groove temperature: 45 DEG C, current density: 28A/dm
2, the time: 2.5h; Containing following component in often liter of chromium plating tank liquor: chromic anhydride: 165g, sulphur is joined: 1.5g, trivalent chromium: 0.5g, Strontium Sulphate: 25g, potassium silicofluoride: 20g has, lithium fluoride or Sodium Fluoride: 1g, compound rare-earth: 0.1g, compound rare-earth comprises following component by weight percentage: La:38%, Ce:10%, Y:3%, Sc:15%, Gd:6%, Sm:3%, Dy:6%, Pr:7%, above each component sum is 100%;
4. clean: the clear water that the valve base after chromium plating puts into 75 DEG C is washed, namely obtains sub-sea drilled wells valve base finished product.
embodiment 2
Present embodiments provide a kind of manufacture method of sub-sea drilled wells valve base, chrome molybdenum low alloy steel is selected to be blank, the component concentration of chrome molybdenum low alloy steel comprises each component of following mass percent: carbon: 0.32%, silicon: 0.36%, manganese: 0.70%, chromium: 1.10%, molybdenum: 0.30%, phosphorus: 0.02%, sulphur: 0.025%, hydrogen: 1.8ppm, nickel: 0.40%, vanadium: 0.03%, copper: 0.30%, 0.9% residual element, all the other are Fe, specifically comprise the steps:
Step (1): heating blank to 920 DEG C, and by blank jumping-up vertically, air cooling to 360 DEG C is also incubated 420 minutes;
Step (2): the blank in step (1) is heated to 890 DEG C again, and along two, the transverse section orthogonal diametric(al) upsetting pull repeatedly of blank, air cooling to 310 DEG C insulation 180 minutes;
Step (3): to the blank heating to 615 DEG C in step (3), and extract valve base forging stock vertically, and carry out quench treatment to it, quenching process specifically comprises:
First refrigerating work procedure: adopt water-cooled with the rate of cooling of 26 DEG C/s by valve base forging stock water-cooled to 750 DEG C;
Second refrigerating work procedure: adopt water-cooled to be combined with air cooling, first adopt water-cooled with the rate of cooling of 3 DEG C/s by valve base forging stock water-cooled to 460 DEG C, then air cooling to 320 DEG C, then adopt water-cooled with the rate of cooling of 4 DEG C/s by valve base forging stock water-cooled to 200 DEG C, last air cooling is to room temperature;
Step (4): chromium plating process is carried out to the valve base forging stock obtained in step (3), specifically comprises the steps:
1. sandblasting: the valve base sandblast machine shaped is carried out sandblasting, washs in the clear water of 70 DEG C after process;
2. etch: groove temperature: 57 DEG C, current density: 39A/dm
2, the time: 48s; Containing following component in often liter of etching tank liquor: chromic anhydride: 165g, sulphur is joined: 1.3g, trivalent chromium: 0.8g, Strontium Sulphate: 35g, potassium silicofluoride: 15g;
3. chromium plating: groove temperature: 50 DEG C, current density: 30A/dm
2, the time: 3.5h; Containing following component in often liter of chromium plating tank liquor: chromic anhydride: 175g, sulphur is joined: 1.8g, trivalent chromium: 0.8g, Strontium Sulphate: 35g, potassium silicofluoride: 25g has, lithium fluoride or Sodium Fluoride: 2g, compound rare-earth: 0.3g;
4. clean: the clear water that the valve base after chromium plating puts into 85 DEG C is washed, namely obtains sub-sea drilled wells valve base finished product.
In addition to the implementation, the present invention can also have other embodiments, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of application claims.
Claims (4)
1. the manufacture method of a sub-sea drilled wells valve base, it is characterized in that, chrome molybdenum low alloy steel is selected to be blank, the mass percent composition of described chrome molybdenum low alloy steel is: carbon: 0.3%-0.32%, silicon: 0.18%-0.36%, manganese: 0.50%-0.70%, chromium: 0.90%-1.10%, molybdenum: 0.20%-0.30%, phosphorus: 0-0.02%, sulphur: 0-0.025%, hydrogen: 0-1.8ppm, nickel: 0-0.40%, vanadium: 0-0.03%, copper: 0-0.30%, 0-0.9% residual element, and all the other are Fe; This manufacture method specifically comprises the steps:
Step (1): heat above-mentioned blank to 900 ± 20 DEG C, and by blank jumping-up vertically, air cooling to 360 DEG C is also incubated 420 minutes;
Step (2): the blank in step (1) is heated to 880 ± 10 DEG C again, and along two, the transverse section orthogonal diametric(al) upsetting pull repeatedly of described blank, air cooling to 300 ± 10 DEG C insulation 180 minutes;
Step (3): to blank heating to 600 ± 15 DEG C in step (2), and extract valve base forging stock vertically, and carry out quench treatment to it, described quenching process specifically comprises:
First refrigerating work procedure: adopt water-cooled with the rate of cooling of 24-26 DEG C/s by valve base forging stock water-cooled to 650-750 DEG C;
Second refrigerating work procedure: adopt water-cooled to be combined with air cooling, first adopt water-cooled with the rate of cooling of 1.5-3 DEG C/s by valve base forging stock water-cooled to 420-460 DEG C, then air cooling is to 290-320 DEG C, adopt again water-cooled with the rate of cooling of 2.5-4 DEG C/s by valve base forging stock water-cooled to 180-200 DEG C, last air cooling is to room temperature;
Step (4): chromium plating process is carried out to the valve base forging stock obtained in step (3), specifically comprise the steps: 1. sandblasting: the valve base sandblast machine shaped is carried out sandblasting, washs in the clear water of 60-70 DEG C after process;
2. etch: groove temperature: 55-57 DEG C, current density: 37-39A/dm
2, the time: 43-48s; Containing following component in often liter of etching tank liquor: chromic anhydride: 150-165g, sulphur is joined: 1.1-1.3g, trivalent chromium: 0.5-0.8g, Strontium Sulphate: 20-35g, potassium silicofluoride: 10-15g;
3. chromium plating: groove temperature: 45-50 DEG C, current density: 28-30A/dm
2, the time: 2.5-3.5h; Containing following component in often liter of chromium plating tank liquor: chromic anhydride: 165-175g, sulphur is joined: 1.5-1.8g, trivalent chromium: 0.5-0.8g, Strontium Sulphate: 25-35g, potassium silicofluoride: 20-25g, lithium fluoride or Sodium Fluoride: 1-2g, compound rare-earth: 0.1 ~ 0.3g;
4. clean: the clear water that the valve base after chromium plating puts into 75-85 DEG C is washed, namely obtains sub-sea drilled wells valve base finished product.
2. the manufacture method of sub-sea drilled wells valve base according to claim 1, it is characterized in that, the component concentration of described chrome molybdenum low alloy steel comprises each component of following mass percent, carbon: 0.3%, silicon: 0.18%, manganese: 0.50%, chromium: 0.90%, molybdenum: 0.20%, phosphorus: 0%, sulphur: 0%, hydrogen: 1.0ppm, nickel: 0%, vanadium: 0%, copper: 0-0.30%, 0-0.9% residual element, all the other are Fe.
3. the manufacture method of sub-sea drilled wells valve base according to claim 1, it is characterized in that, described chrome molybdenum low alloy steel component concentration comprise each component of following mass percent, carbon: 0.32%, silicon: 0.36%, manganese: 0.70%, chromium: 1.10%, molybdenum: 0.30%, phosphorus: 0.02%, sulphur: 0.025%, hydrogen: 1.8ppm, nickel: 0.40%, vanadium: 0.03%, copper: 0.30%, 0-0.9% residual element, all the other are Fe.
4. the manufacture method of sub-sea drilled wells valve base according to claim 1, it is characterized in that: described in step (4), compound rare-earth comprises following component by weight percentage: La:38 ~ 40%, Ce:10 ~ 13%, Y:3 ~ 4%, Sc:15 ~ 20%, Gd:6 ~ 8%, Sm:3 ~ 4%, Dy:6 ~ 8%, Pr:7 ~ 9%, above each component sum is 100%.
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| CN105960479B (en) * | 2014-02-07 | 2018-02-23 | 新日铁住金株式会社 | Oil well high alloy |
| CN103993247A (en) * | 2014-05-09 | 2014-08-20 | 无锡市华尔泰机械制造有限公司 | Embedded saddle dedicated alloy material |
| CN104213036B (en) * | 2014-08-26 | 2017-03-08 | 苏州孚杰机械有限公司 | A kind of production method of the low-alloy valve body suitable under acid operating mode |
| CN104405456B (en) * | 2014-09-26 | 2016-05-04 | 江苏华强新能源科技有限公司 | A kind of manufacturing process of the flue for combustion turbine exhaustion system |
| CN107866519A (en) * | 2017-11-14 | 2018-04-03 | 朱建海 | A kind of production technology of corrosion-resistant bronze valve |
| CN111456661B (en) * | 2020-04-30 | 2022-02-01 | 青岛宏新天机械有限公司 | Durable drill rod float valve |
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| JPS5940220B2 (en) * | 1978-11-20 | 1984-09-28 | 新日本製鐵株式会社 | Low alloy steel with excellent sulfide corrosion cracking resistance |
| CN102029347A (en) * | 2010-12-29 | 2011-04-27 | 中原特钢股份有限公司 | Manufacturing method of gear shaft forge piece for offshore drilling platform |
| CN102400065A (en) * | 2010-09-07 | 2012-04-04 | 鞍钢股份有限公司 | High-toughness and ultra-high strength seamless steel pipe for oil well and manufacturing method thereof |
| CN102965695A (en) * | 2012-11-16 | 2013-03-13 | 镇江市华阳机电制造有限公司 | Chromium plating process used for valve rod |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5940220B2 (en) * | 1978-11-20 | 1984-09-28 | 新日本製鐵株式会社 | Low alloy steel with excellent sulfide corrosion cracking resistance |
| CN102400065A (en) * | 2010-09-07 | 2012-04-04 | 鞍钢股份有限公司 | High-toughness and ultra-high strength seamless steel pipe for oil well and manufacturing method thereof |
| CN102029347A (en) * | 2010-12-29 | 2011-04-27 | 中原特钢股份有限公司 | Manufacturing method of gear shaft forge piece for offshore drilling platform |
| CN102965695A (en) * | 2012-11-16 | 2013-03-13 | 镇江市华阳机电制造有限公司 | Chromium plating process used for valve rod |
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