CN106702285A - Steel for fluid end of fracturing pump, and preparation process thereof - Google Patents

Steel for fluid end of fracturing pump, and preparation process thereof Download PDF

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Publication number
CN106702285A
CN106702285A CN201611136545.0A CN201611136545A CN106702285A CN 106702285 A CN106702285 A CN 106702285A CN 201611136545 A CN201611136545 A CN 201611136545A CN 106702285 A CN106702285 A CN 106702285A
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slag
steel
electroslag remelting
refining
smelting
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Inventor
吴高明
徐良乐
吴高路
徐良清
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MA'ANSHAN CITY TIANMA METALLURGICAL MATERIALS Co Ltd
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MA'ANSHAN CITY TIANMA METALLURGICAL MATERIALS Co Ltd
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Priority to CN201611136545.0A priority Critical patent/CN106702285A/en
Publication of CN106702285A publication Critical patent/CN106702285A/en
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0006—Adding metallic additives
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0025—Adding carbon material
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/06—Deoxidising, e.g. killing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10—Handling in a vacuum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/16—Remelting metals
    • C22B9/18—Electroslag remelting
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten

Abstract

The invention discloses steel for a fluid end of a fracturing pump, and a preparation process thereof. A continuous cast round billet of steel with T.O of not greater than 0.0015%, for the fluid end of the fracturing pump, can be produced, and then electroslag remelting (ESR) is carried out; the specific technical scheme of the electroslag remelting comprises two modules for smelting preparation for a consumable electrode and electroslag remelting for the consumable electrode; and the following technical route is adopted: electric arc furnace primary smelting, LF refining, RH vacuum refining, round billet continuous casting, billet continuous casting, electroslag remelting and ESR ingot obtaining. The invention provides steel for a fluid end of a fracturing pump, and an electroslag remelting process thereof. The components are redesigned, electric process parameters are correspondingly adjusted, and an electroslag remelting process capable of controlling the contents of gas elements in the steel and low in energy consumption is developed.

Description

A kind of pressure break pump hydraulic end steel and its preparation technology
Technical field
The present invention relates to extraordinary metallurgical electroslag remelting field, in particular, provide a kind of pressure break pump hydraulic end steel and its Preparation technology.
Background technology
The oil exploitation of pressure break pump hydraulic end cement the well fracturing unit truck power end important component, be mainly used in acidification, well cementation, Gravel filling, fracturing work etc., in the severe use environment such as acidifying, sand ratio high, high pressure, huge discharge.It is required that ferrous materials have There is the performance such as wearability high, high pressure resistant, shock resistance, meet the fluid end interior holding high-performance operation of service phase under severe conditions Use requirement.
The principal component of pressure break pump hydraulic end steel meets U.S.'s SAE 4330V material standards.Although defining conjunction in standard Gold element composition range, but different heat treatment technological requirement can not be met.Additionally, also fail to [O] before the forging of clear and definite material, The control range of the impurity elements such as [H], [N].
The content of the invention
The invention aims to solve the problems, such as prior art, there is provided a kind of pressure break pump hydraulic end steel and its Preparation technology, hydrogen, oxygen in control electric slag refusion ingot, nitrogen content meet the requirement of pressure break pump hydraulic end steel, and process costs are low Match with remelting processing, meet the purpose of economical and efficient operation.
The purpose of the present invention is achieved through the following technical solutions：
A kind of pressure break pump hydraulic end steel, is made up of the chemical composition of following percentage by weight：C%：0.25~0.40, Si%：≤ 0.30, Mn%：0.25~0.50, Cr%：1.10~1.70, T.O%：≤ 0.0015, P%：≤ 0.0080, S%： ≤ 0.0050, Al%：0.010~0.025, Ni%：2.80~3.50, Mo%：0.30~0.60, V%：0.05~0.20, Ti%≤0.0015, Cu%≤0.15, As%≤0.04, Sn%≤0.03, Sb%≤0.005, Pb%≤0.002, remaining is Fe and inevitable impurity.
A kind of preparation technology of pressure break pump hydraulic end steel, includes smelting preparation technology module, the consumable of consutrode The electroslag remelting process module of electrode, specific steps are followed successively by：Step, LF refining step, RH vacuum refinings step are refined at the beginning of electric arc furnaces Suddenly, round billet continuous casting step, continuous casting billet step, electroslag remelting step, ESR ingot step.
The smelting preparation technology module of the consutrode is comprised the following steps that：
A) electric arc furnace smelting：Using changing slag operation, the heat of oxidation terminates to flow out whole oxidizing slags and renews slag electric furnace, it is ensured that electric arc Stove terminal Ti≤0.0008%, P≤0.0060%；
B) electric arc furnaces slag free tapping：Eccentric bottom tapping, if steel need to be stayed, stays steel amount to control 15%~20%；
C) LF stoves refining：LF refining basicity of slag is controlled 1.5~2.0, adds the carbon dust to carry out using calcium carbide during LF refining Diffusive deoxidation, the white slag retention time is more than 20 minutes；
D) RH vacuum refinings：In below vacuum 67Pa, vacuum is kept for 15~20 minutes；Vacuum refining terminates first 5 minutes Addition aluminum shot increases Al to desired value.
The electroslag remelting process module of the consutrode is comprised the following steps that：
A) round billet that consutrode is obtained using the technological process of electric furnace-LF-RH- round billet continuous castings, cleaved scale, surface sand Divest rust to round billet surface-brightening；
B) electro slag remelting slag uses CaF2Account for 68%~72%, Al2O328%~32% is accounted for, consumption is 38~42kg/t steel, Slag charge need in the resistance furnace continuous baking more than 12 hours at a temperature of 740~760 DEG C, that is, take and use；
C) using nominal capacity for 10t electroslag refining furnace concentration group produce, melt speed it is constant and with electrode size, crystallizer ingot Type is matched.ForIngot shape, packing ratio is 0.59, and melting current and voltage are controlled in 17000~18500A respectively With 65~70V, melting speed control is in 820~960kg/h；ForIngot shape, packing ratio is 0.67, melting current and electricity Pressure is controlled in 16000~16900A and 64~67V respectively, and melting speed control is in 800~920kg/h；
D) it is control field trash shape and further deoxidation, rare earth is added at regular intervals during electroslag remelting smelting, Rare-earth usage accounts for the 0.05%~0.2% of total quantity of slag；
E) three step drop electric currents of feeding point, shrinkage cavity severity control is within 50mm；
F) feeding terminates rear mold cold 2 hours, is incubated 10 hours at 860 DEG C into annealing furnace afterwards, then stove be cooled to≤ 300 DEG C, come out of the stove.
The technical solution adopted for the present invention to solve the technical problems is：The present invention can produce T.O≤0.0015% pressure The continuous cast round billets of pump hydraulic end steel are split, electroslag remelting (ESR) is then carried out, the concrete technical scheme of electroslag remelting includes consumable Electrode smelting prepare, the big module of electroslag remelting two of consutrode, the technology path for using for：Refining → LF refining at the beginning of electric arc furnaces → RH vacuum refinings → round billet continuous casting → continuous casting billet → electroslag remelting → ESR ingot.
The beneficial effects of the invention are as follows：(1) cleanliness factor of steel is high；(2) electric slag refusion and smelting power consumption reduces 100- 150kwh/t steel, and control stability between stove and stove is good；Due to being produced using continuous cast round billets batch concentration group, chemical composition Good stability, technique applicability is wide, simple to operate, it is easy to accomplish standardized work, has both been adapted to production the nickelic of high-cleanness, high and has contained The ESR ingot of amount, also is adapted for producing the chromium Ni-Mo alloy steel of other high-cleanness, highs.
Specific embodiment
The present invention can produce the continuous cast round billets of the pressure break pump hydraulic end steel of T.O≤0.0015%, then carry out electroslag Remelting (ESR), concrete technical scheme includes that the smelting of consutrode prepares the big module of electroslag remelting two with consutrode.
A kind of pressure break pump hydraulic end steel, is made up of the chemical composition of following percentage by weight：C%：0.25~0.40, Si%：≤ 0.30, Mn%：0.25~0.50, Cr%：1.10~1.70, T.O%：≤ 0.0015, P%：≤ 0.0080, S%： ≤ 0.0050, Al%：0.010~0.025, Ni%：2.80~3.50, Mo%：0.30~0.60, V%：0.05~0.20, Ti%≤0.0015, Cu%≤0.15, As%≤0.04, Sn%≤0.03, Sb%≤0.005, Pb%≤0.002, remaining is Fe and inevitable impurity.
A kind of preparation technology of pressure break pump hydraulic end steel, includes smelting preparation technology module, the consumable of consutrode The electroslag remelting process module of electrode, specific steps are followed successively by：Step, LF refining step, RH vacuum refinings step are refined at the beginning of electric arc furnaces Suddenly, round billet continuous casting step, continuous casting billet step, electroslag remelting step, ESR ingot step.
The smelting preparation technology module of the consutrode is comprised the following steps that：
A) electric arc furnace smelting：Using changing slag operation, the heat of oxidation terminates to flow out whole oxidizing slags and renews slag electric furnace, it is ensured that electric arc Stove terminal Ti≤0.0008%, P≤0.0060%；
B) electric arc furnaces slag free tapping：Eccentric bottom tapping, if steel need to be stayed, stays steel amount to control 15%~20%；
C) LF stoves refining：LF refining basicity of slag is controlled 1.5~2.0, adds the carbon dust to carry out using calcium carbide during LF refining Diffusive deoxidation, the white slag retention time is more than 20 minutes；
D) RH vacuum refinings：In below vacuum 67Pa, vacuum is kept for 15~20 minutes；Vacuum refining terminates first 5 minutes Addition aluminum shot increases Al to desired value.
The electroslag remelting process module of the consutrode is comprised the following steps that：
A) round billet that consutrode is obtained using the technological process of electric furnace-LF-RH- round billet continuous castings, cleaved scale, surface sand Divest rust to round billet surface-brightening；
B) electro slag remelting slag uses CaF2Account for 68%~72%, Al2O328%~32% is accounted for, consumption is 38~42kg/t steel, Slag charge need in the resistance furnace continuous baking more than 12 hours at a temperature of 740~760 DEG C, that is, take and use；
C) using nominal capacity for 10t electroslag refining furnace concentration group produce, melt speed it is constant and with electrode size, crystallizer ingot Type is matched.ForIngot shape, packing ratio is 0.59, and melting current and voltage are controlled in 17000~18500A respectively With 65~70V, melting speed control is in 820~960kg/h；ForIngot shape, packing ratio is 0.67, melting current and electricity Pressure is controlled in 16000~16900A and 64~67V respectively, and melting speed control is in 800~920kg/h；
D) it is control field trash shape and further deoxidation, rare earth is added at regular intervals during electroslag remelting smelting, Rare-earth usage accounts for the 0.05%~0.2% of total quantity of slag；
E) three step drop electric currents of feeding point, shrinkage cavity severity control is within 50mm；
F) feeding terminates rear mold cold 2 hours, is incubated 10 hours at 860 DEG C into annealing furnace afterwards, then stove be cooled to≤ 300 DEG C, come out of the stove.
It is of the invention compared with the technology that conventionally employed static ingot carries out electroslag remelting, have the following advantages that：
(1) cleanliness factor of steel is high：H≤0.0002% in steel, T.O≤0.0010%, N≤0.0070%, Ti≤ 0.0010%, P≤0.0080%, S≤0.0050%, after ESR ingot is forged, the non-metallic inclusion A+B+C+D+ in forging stock DS≤ 2.0 grades.
(2) electric slag refusion and smelting power consumption reduces 100~150kwh/t steel, and the control stability between stove and stove It is good.
The electroslag remelting main technologic parameters of the embodiment of the present invention are shown in Table 1.
The electroslag remelting main technologic parameters of the embodiment of the present invention of table 1

Claims (4)

1. a kind of pressure break pump hydraulic end steel, it is characterised in that：It is made up of the chemical composition of following percentage by weight：C%：0.25 ~ 0.40, Si%：≤ 0.30, Mn%：0.25 ~ 0.50, Cr%：1.10 ~ 1.70, T.O%：≤ 0.0015, P%：≤ 0.0080, S%：≤ 0.0050, Al%：0.010 ~ 0.025, Ni%：2.80 ~ 3.50, Mo%：0.30 ~ 0.60, V%：0.05 ~ 0.20, Ti%≤0.0015, Cu%≤0.15, As%≤0.04, Sn%≤0.03, Sb%≤0.005, Pb%≤0.002, remaining be Fe and inevitably it is impure Thing.
2. a kind of preparation technology of pressure break pump hydraulic end steel as claimed in claim 1, it is characterised in that：Include from power consumption The smelting preparation technology module of pole, the electroslag remelting process module of consutrode, specific steps are followed successively by：Step is refined at the beginning of electric arc furnaces Suddenly, LF refining step, RH vacuum refinings step, round billet continuous casting step, continuous casting billet step, electroslag remelting step, ESR ingot step.
3. the preparation technology of a kind of pressure break pump hydraulic end steel according to claim 2, it is characterised in that：It is described from power consumption The smelting preparation technology module of pole is comprised the following steps that：
a）Electric arc furnace smelting：Using changing slag operation, the heat of oxidation terminates to flow out whole oxidizing slags and renews slag electric furnace, it is ensured that electric arc furnaces end Point Ti≤0.0008%, P≤0.0060%；
b）Electric arc furnaces slag free tapping：Eccentric bottom tapping, if steel need to be stayed, stays steel amount to control 15% ~ 20%；
c）LF stoves are refined：LF refining basicity of slag is controlled 1.5 ~ 2.0, using calcium carbide adds carbon dust to be diffused during LF refining de- Oxygen, the white slag retention time is more than 20 minutes；
d）RH vacuum refinings：In below vacuum 67Pa, vacuum is kept for 15 ~ 20 minutes；Vacuum refining terminates first 5 minutes addition aluminium Grain increases Al to desired value.
4. the preparation technology of a kind of pressure break pump hydraulic end steel according to claim 2, it is characterised in that：It is described from power consumption The electroslag remelting process module of pole is comprised the following steps that：
a）The round billet that consutrode is obtained using the technological process of electric furnace-LF-RH- round billet continuous castings, cleaved scale, surface sand are divested Become rusty to round billet surface-brightening；
b）Electro slag remelting slag uses CaF2Account for 68%~72%, Al2O3Account for 28%~32%, consumption is 38 ~ 42kg/t steel, slag charge need to be Continuous baking more than 12 hours at a temperature of 740 ~ 760 DEG C, that is, take and use in resistance furnace；
c）Using nominal capacity for 10t electroslag refining furnace concentration group produce, melt speed it is constant and with electrode size, crystallizer ingot shape Match somebody with somebody, for the ingot shape of φ 1020mm, packing ratio is 0.59, melting current and voltage control respectively 17000 ~ 18500A and 65 ~ 70V, melting speed control is in 820 ~ 960kg/h；For the ingot shape of φ 940mm, packing ratio is 0.67, and melting current and voltage are controlled respectively , in 16000 ~ 16900A and 64 ~ 67V, melting speed control is in 800 ~ 920kg/h for system；
d）It is control field trash shape and further deoxidation, adds rare earth, rare earth during electroslag remelting smelting at regular intervals Consumption accounts for the 0.05% ~ 0.2% of total quantity of slag；
e）Three step drop electric currents of feeding point, shrinkage cavity severity control is within 50mm；
f）Feeding terminates rear mold cold 2 hours, is incubated 10 hours at 860 DEG C into annealing furnace afterwards, and then stove is cooled to≤300 DEG C, come out of the stove.
CN201611136545.0A 2016-12-12 2016-12-12 Steel for fluid end of fracturing pump, and preparation process thereof Pending CN106702285A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110257590A (en) * 2019-07-19 2019-09-20 北京科技大学 A kind of refinement high-cleanness, high rare earth electroslag steel inclusion method
CN111041328A (en) * 2019-12-25 2020-04-21 鞍钢铸钢有限公司 Toothless saw blade for cutting steel rope and production method thereof

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CN102021488A (en) * 2010-11-30 2011-04-20 攀钢集团钢铁钒钛股份有限公司 Steel for nuclear-island seamless steel tube and production method thereof
CN103014537A (en) * 2011-09-21 2013-04-03 山西太钢不锈钢股份有限公司 Smelting method of steel used in high speed passenger train hollow axle
CN104525919A (en) * 2014-12-09 2015-04-22 抚顺特殊钢股份有限公司 Method for manufacturing steel ingots through ultra-supercritical steam turbine blade steel electro-slag remelting
CN105483504A (en) * 2015-12-07 2016-04-13 攀钢集团成都钢钒有限公司 Production method for tube blank steel for -195 DEG C ultra-low temperature seamless steel tube

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101082101A (en) * 2006-05-29 2007-12-05 宝山钢铁股份有限公司 Chromic-nickel-free high-strength high ductility structural steel and manufacturing method thereof
CN102021488A (en) * 2010-11-30 2011-04-20 攀钢集团钢铁钒钛股份有限公司 Steel for nuclear-island seamless steel tube and production method thereof
CN103014537A (en) * 2011-09-21 2013-04-03 山西太钢不锈钢股份有限公司 Smelting method of steel used in high speed passenger train hollow axle
CN104525919A (en) * 2014-12-09 2015-04-22 抚顺特殊钢股份有限公司 Method for manufacturing steel ingots through ultra-supercritical steam turbine blade steel electro-slag remelting
CN105483504A (en) * 2015-12-07 2016-04-13 攀钢集团成都钢钒有限公司 Production method for tube blank steel for -195 DEG C ultra-low temperature seamless steel tube

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110257590A (en) * 2019-07-19 2019-09-20 北京科技大学 A kind of refinement high-cleanness, high rare earth electroslag steel inclusion method
CN110257590B (en) * 2019-07-19 2020-07-31 北京科技大学 Method for refining inclusions in high-cleanliness rare earth electroslag steel
CN111041328A (en) * 2019-12-25 2020-04-21 鞍钢铸钢有限公司 Toothless saw blade for cutting steel rope and production method thereof

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