CN103614632A - Manufacturing method of submarine oil well valve base - Google Patents
Manufacturing method of submarine oil well valve base Download PDFInfo
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- CN103614632A CN103614632A CN201310663728.8A CN201310663728A CN103614632A CN 103614632 A CN103614632 A CN 103614632A CN 201310663728 A CN201310663728 A CN 201310663728A CN 103614632 A CN103614632 A CN 103614632A
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Abstract
The invention discloses a manufacturing method of a submarine oil well valve base. Chrome-molybdenum low-alloy steel is selected as a blank. The chrome-molybdenum low-alloy steel comprises the following components in percentage by mass: 0.3-0.32% of carbon, 0.18-0.36% of silicon, 0.50-0.70% of manganese, 0.90-1.10% of chrome, 0.20-0.30% of molybdenum, 0-0.02% of phosphorus, 0-0.025% of sulfur, 0-1.8ppm of hydrogen, 0-0.40% of nickel, 0-0.03% of vanadium, 0-0.30% of copper, 0-0.9% residual element and the balance of Fe. The manufacturing method disclosed by the invention can enhance the pressure resistance and toughness of the valve base and prevent the chrome coating from shedding.
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, H
2s and CO
2gas, and operating pressure is that 35MPa ~ 69MPa is even higher, temperature is minimum reaches subzero 50 degrees Celsius, although use AISI4130(MOD) material, but the deep-sea valve seat producing with conventional forge piece manufacturing process, 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 ℃, chromium metal is very easily passivation in air, and surface forms one deck passive film as thin as a wafer, thereby 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 500 ℃ of following heating, its glossiness, hardness have no significant change, and temperature is greater than 500 ℃ and starts oxidation stain, is greater than 700 ℃ of hardness and starts to reduce.The frictional coefficient of chromium coating is little, and particularly dry friction coefficient is minimum in all metals, thus chromium coating tool have good wearability, yet in prior art, after valve base chrome-faced, its chromium coating easily comes off, 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, a kind of resistance to pressure, toughness that can improve valve block is provided, and can prevents the manufacture method of the sub-sea drilled wells valve base that chromium coating comes off.
In order to solve above technical problem, the invention provides a kind of manufacture method of sub-sea drilled wells valve base, selecting chrome molybdenum low alloy steel is 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 ℃, and by blank jumping-up vertically, air cooling to 360 ℃ is also incubated 420 minutes;
Step (2): the blank in step (1) is heated to 880 ± 10 ℃ again, and along two, the transverse section orthogonal diametric(al) upsetting pull repeatedly of blank, air cooling to 300 ± 10 ℃ insulation 180 minutes;
Step (3): to blank heating to 600 ± 15 ℃ in step (3), and extract vertically valve base forging stock, and it is carried out to quench treatment, quenching process specifically comprises:
The first refrigerating work procedure: adopt water-cooled with the rate of cooling of 24-26 ℃/s by valve base forging stock water-cooled to 650-750 ℃;
The 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 ℃/s by valve base forging stock water-cooled to 420-460 ℃, then air cooling is to 290-320 ℃, adopt again water-cooled with the rate of cooling of 2.5-4 ℃/s by valve base forging stock water-cooled to 180-200 ℃, last air cooling is to room temperature;
Step (4): the valve base forging stock obtaining in step (3) is carried out to chromium plating processing, specifically comprise the steps:
1. sandblasting: the valve base shaping is carried out to sandblasting with sandblast machine, wash in the clear water of 60-70 ℃ after processing;
2. etching: groove temperature: 55-57 ℃, current density: 37-39A/dm
2, the time: 43-48s; In every liter of etching tank liquor, contain following component: 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 ℃, current density: 28-30A/dm
2, the time: 2.5-3.5h; In every liter of chromium plating tank liquor, contain following component: 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 of the valve base after chromium plating being put into 75-85 ℃ washs, and obtains sub-sea drilled wells valve base finished product.The technical scheme that the present invention further limits 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:
It is many that step in the present invention (1) to step (3) utilizes blank deformation direction to change, steel ingot heart portion metal outwards flows, effectively broken as cast condition dentrite tissue, inner loosening closed in forging, hole, defects i.e.cracks, density and the continuity of metal have been improved, promoted the kneading of as-cast structure simultaneously, make the inside and outside tissue trend of forging evenly, alleviated the segregation journey of forging tissue, from tissue, guarantee that forging is in modified heat treated quenching process subsequently, avoid forging the concentrated crackle of quenching stress of tissue defects initiation or the hardening break causing therefrom, strengthen the ability of going out of complex-shaped forging opposing thermal treatment thermal stresses and structural stress,
In chromium plating tank liquor of the present invention, be added with Strontium Sulphate and potassium silicofluoride, Strontium Sulphate and potassium silicofluoride exist resolution of precipitate balance separately, and have respectively a solubility product constant Ksp, i.e. [S0 in solution
4 2-] or [SiF
6 2-] concentration is when increase, corresponding ionic concn product will be greater than solubility product constant, excessive S0
4 2-or SiF
6 2-just generate SrS0
4or K
2siF
6precipitate and separate out; On the contrary, [S0 in solution
4 2-] or [SiF
6 2-] concentration is when not enough, the SrS0 in groove
4or K
2siF
6resolution of precipitate, until corresponding ionic concn product is while equaling its solubility product, so, when the temperature of plating solution and the concentration of chromic anhydride one regularly, [S0 in plating solution
4 2-] or [SiF
6 2-] concentration can regulate automatically by dissolution precipitation balance, with electroplating process continue do not change.The advantages such as therefore, the dispersive ability of plating solution of the present invention and covering power are good, sedimentation velocity fast (50/-m/h); On the basis of above chromium plating tank liquor, add a certain amount of rare earth element and fluorion, adopt rare earth element can reduce chromic anhydride concentration, widen plating temperature scope (10～50 ℃) and cathode current density scope (5～30A/dm
2), reduce groove and press, improve luminance brightness and the hardness of coating, chromium plating is produced and realize low temperature, less energy-consumption, low pollution and high-level efficiency;
After tempering of the present invention, adopt water-cooled to be combined with air cooling, be followed successively by: water-cooled-air cooling-water-cooled-air cooling, like this, by the cooling control after tempering, can make carbide further fully dissolve, evenly diffusion, avoided carbide to cause intergranular corrosion and spot corrosion to exceed standard separating out of intergranular, guaranteed that the ferrite content of material is in 30% left and right, can further make material solid solution abundant, avoided heat treatment mode heating uneven, the erosion rate that solid solution inequality is brought exceeds standard and hardness exceeds standard, and has consolidated and has smelted the technique effect that postheat treatment technique produces above;
Valve base after technique chromium plating of the present invention is carried out to torsion test, and equal end finds that there is chromium layer and comes off from valve base matrix; By hard detection, chromium layer hardness 1150～1200HV, apparently higher than existing chromium plating valve base chromium layer 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 realize low temperature, less energy-consumption, low pollution and high-level efficiency.
Embodiment
embodiment 1
The present embodiment provides the manufacture method that the invention provides a kind of sub-sea drilled wells valve base, selecting chrome molybdenum low alloy steel is 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 ℃, and by blank jumping-up vertically, air cooling to 360 ℃ is also incubated 420 minutes;
Step (2): the blank in step (1) is heated to 870 ℃ again, and along two, the transverse section orthogonal diametric(al) upsetting pull repeatedly of blank, air cooling to 290 ℃ insulation 180 minutes;
Step (3): to the blank heating to 585 ℃ in step (3), and extract vertically valve base forging stock, and it is carried out to quench treatment, quenching process specifically comprises:
The first refrigerating work procedure: adopt water-cooled with the rate of cooling of 24 ℃/s by valve base forging stock water-cooled to 650 ℃;
The 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 ℃/s by valve base forging stock water-cooled to 420 ℃, then air cooling to 290 ℃, then adopt water-cooled with the rate of cooling of 2.5 ℃/s by valve base forging stock water-cooled to 180 ℃, last air cooling is to room temperature;
Step (4): the valve base forging stock obtaining in step (3) is carried out to chromium plating processing, specifically comprise the steps:
1. sandblasting: the valve base shaping is carried out to sandblasting with sandblast machine, wash in the clear water of 60-70 ℃ after processing;
2. etching: groove temperature: 55 ℃, current density: 37A/dm
2, the time: 43s; In every liter of etching tank liquor, contain following component: chromic anhydride: 150g, sulphur is joined: 1.1g, trivalent chromium: 0.5g, Strontium Sulphate: 20g, potassium silicofluoride: 10g;
3. chromium plating: groove temperature: 45 ℃, current density: 28A/dm
2, the time: 2.5h; In every liter of chromium plating tank liquor, contain following component: 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: La:38%, Ce:10% by weight percentage, Y:3%, Sc:15%, Gd:6%, Sm:3%, Dy:6%, Pr:7%, above each component sum is 100%;
4. clean: the clear water of the valve base after chromium plating being put into 75 ℃ washs, and obtains sub-sea drilled wells valve base finished product.
embodiment 2
The present embodiment provides a kind of manufacture method of sub-sea drilled wells valve base, selecting chrome molybdenum low alloy steel is 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 ℃, and by blank jumping-up vertically, air cooling to 360 ℃ is also incubated 420 minutes;
Step (2): the blank in step (1) is heated to 890 ℃ again, and along two, the transverse section orthogonal diametric(al) upsetting pull repeatedly of blank, air cooling to 310 ℃ insulation 180 minutes;
Step (3): to the blank heating to 615 ℃ in step (3), and extract vertically valve base forging stock, and it is carried out to quench treatment, quenching process specifically comprises:
The first refrigerating work procedure: adopt water-cooled with the rate of cooling of 26 ℃/s by valve base forging stock water-cooled to 750 ℃;
The second refrigerating work procedure: adopt water-cooled to be combined with air cooling, first adopt water-cooled with the rate of cooling of 3 ℃/s by valve base forging stock water-cooled to 460 ℃, then air cooling to 320 ℃, then adopt water-cooled with the rate of cooling of 4 ℃/s by valve base forging stock water-cooled to 200 ℃, last air cooling is to room temperature;
Step (4): the valve base forging stock obtaining in step (3) is carried out to chromium plating processing, specifically comprise the steps:
1. sandblasting: the valve base shaping is carried out to sandblasting with sandblast machine, wash in the clear water of 70 ℃ after processing;
2. etching: groove temperature: 57 ℃, current density: 39A/dm
2, the time: 48s; In every liter of etching tank liquor, contain following component: chromic anhydride: 165g, sulphur is joined: 1.3g, trivalent chromium: 0.8g, Strontium Sulphate: 35g, potassium silicofluoride: 15g;
3. chromium plating: groove temperature: 50 ℃, current density: 30A/dm
2, the time: 3.5h; In every liter of chromium plating tank liquor, contain following component: 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 of the valve base after chromium plating being put into 85 ℃ washs, and 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 requirement of the present invention.
Claims (4)
1. the manufacture method of a sub-sea drilled wells valve base, it is characterized in that, selecting chrome molybdenum low alloy steel is 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 ℃, and by blank jumping-up vertically, air cooling to 360 ℃ is also incubated 420 minutes;
Step (2): the blank in step (1) is heated to 880 ± 10 ℃ again, and along two, the transverse section orthogonal diametric(al) upsetting pull repeatedly of described blank, air cooling to 300 ± 10 ℃ insulation 180 minutes;
Step (3): to blank heating to 600 ± 15 ℃ in step (3), and extract vertically valve base forging stock, and it is carried out to quench treatment, described quenching process specifically comprises:
The first refrigerating work procedure: adopt water-cooled with the rate of cooling of 24-26 ℃/s by valve base forging stock water-cooled to 650-750 ℃;
The 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 ℃/s by valve base forging stock water-cooled to 420-460 ℃, then air cooling is to 290-320 ℃, adopt again water-cooled with the rate of cooling of 2.5-4 ℃/s by valve base forging stock water-cooled to 180-200 ℃, last air cooling is to room temperature;
Step (4): the valve base forging stock obtaining in step (3) is carried out to chromium plating processing, specifically comprise the steps:
1. sandblasting: the valve base shaping is carried out to sandblasting with sandblast machine, wash in the clear water of 60-70 ℃ after processing;
2. etching: groove temperature: 55-57 ℃, current density: 37-39A/dm
2, the time: 43-48s; In every liter of etching tank liquor, contain following component: 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 ℃, current density: 28-30A/dm
2, the time: 2.5-3.5h; In every liter of chromium plating tank liquor, contain following component: 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 of the valve base after chromium plating being put into 75-85 ℃ washs, and 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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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104213036A (en) * | 2014-08-26 | 2014-12-17 | 苏州孚杰机械有限公司 | Production method suitable for low-alloy valve body under acidic working condition |
| CN104405456A (en) * | 2014-09-26 | 2015-03-11 | 江苏华强新能源科技有限公司 | Manufacturing technology of flue for gas turbine exhaust system |
| CN105960479A (en) * | 2014-02-07 | 2016-09-21 | 新日铁住金株式会社 | High alloy for oil well use |
| CN107866519A (en) * | 2017-11-14 | 2018-04-03 | 朱建海 | A kind of production technology of corrosion-resistant bronze valve |
| CN111456661A (en) * | 2020-04-30 | 2020-07-28 | 青岛宏新天机械有限公司 | Durable drill rod float valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105960479A (en) * | 2014-02-07 | 2016-09-21 | 新日铁住金株式会社 | High alloy for oil well use |
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| CN104405456A (en) * | 2014-09-26 | 2015-03-11 | 江苏华强新能源科技有限公司 | Manufacturing technology of flue for gas turbine exhaust system |
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| CN107866519A (en) * | 2017-11-14 | 2018-04-03 | 朱建海 | A kind of production technology of corrosion-resistant bronze valve |
| CN111456661A (en) * | 2020-04-30 | 2020-07-28 | 青岛宏新天机械有限公司 | Durable drill rod float 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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| CN103614632B (en) | 2015-10-28 |
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