CN101871082A - High-strength tough non-magnetic alloy and preparation method thereof - Google Patents
High-strength tough non-magnetic alloy and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a high-strength tough non-magnetic alloy and a preparation method thereof, and belongs to the technical field of austenitic alloy. The alloy comprises the following chemical components in percentage by weight: 0.14-0.30% of C, 0.15-0.80% of Si, 20.00-27.00% of Mn, 0.60-2.00% of Ni, 12.50-19.00% of Cr, 0.60-2.50% of one or two elements of Mo and W, 0.8 to [0.1 * Mn (%) -0.5]% of V, one or two elements of Ti and Nb which can partially replace V with the additive amount controlled within 0.6%, 0.20-0.50% of N, 0.003-0.05% of one or two of Ca and rare earth element, less than or equal to 0.03% of S, less than or equal to 0.03% of P and the balance of Fe. The invention has the advantages that the cost of the raw material is low, the production technology is simple, and the non-magnetic performance and the resistance to intergranular corrosion are stable.
Description
Technical field
The invention belongs to the austenitic alloy technical field, a kind of high-strength tough non-magnetic alloy and preparation method thereof particularly is provided, a kind of usefulness with high strength toughness non-magnetic drill collar.
Background technology
Stone oil drill collar is classified according to magnetic function with material, and can be divided into has magnetic material (general applications) and no magnetic material, and wherein non-magnetic drill collar is an indispensable down-hole apparatus in horizontal well drilling, the orientation well.Non-magnetic drill collar requires material to remove to have low magnetic permeability, and promptly under 200 oersted magnetic fields, μ≤1.01 also need to have higher intensity, plasticity, impelling strength and do not allow to exist intergranular corrosion cracking etc., to guarantee the safe and reliable use of drill collar.In order to satisfy the nonmagnetic energy of non-magnetic drill collar, material is necessary for the full austenite matrix, and must contain higher Cr amount of element, to guarantee the corrosion resistance of alloy requirement.Adopt 200 stainless steels serial and 300 series all can guarantee the solidity to corrosion and the nonmagnetic requirement of alloy.But after common process production, the strength property of such alloy does not reach the drill collar service requirements, because alloy contains more noble elements such as Ni, and cost is higher, lacks the market competitiveness simultaneously.Under the prerequisite that satisfies nonmagnetic energy and corrosion resisting property, can adopt cryogenic forging technology to improve the intensity of alloy, as Chinese patent (CN1038353C and CN101311290) by the mode of working hardening.Wherein the CN1038353C patent mainly forms stable austenitic matrix by Mn, Ni, N, Si, Mo, N solution strengthening.The last resort cryogenic forging comes working hardening, realizes that intensity increases substantially, and reaches the mechanical property requirements of non-magnetic drill collar.The composition design philosophy of CN101311290 is basic consistent with the former with preparation for processing, mainly be suitably to improve the Cr constituent content, improve corrosion resisting property, suitably reduce Ni, Mo constituent content, reduce cost, also adopt very low temperature gross distortion forging process at last, rely on working hardening to reach the mechanical property requirements of non-magnetic drill collar.
Domestic have only the Central Plains special steel to adopt the CN1038353C patented technology to produce non-magnetic drill collar at present, its production capacity can not be met the need of market far away, introduce according to the CN101311290 patent, this invention also can only adopt very low temperature gross distortion forging process to improve mechanical property.Because the alloying level of non-magnetic drill collar alloy is higher, the resistance to deformation when it forges is bigger, and resistance to deformation significantly increases along with the reduction of forging temperature, and especially at low thermophase, resistance to deformation reduces and sharply increases with forging temperature.The forged non-magnetic drill collar size of while institute is very big, and (blank length reaches 9.6m, general blank diameter 170～180mm, maximum reaches 280mm), when cryogenic forging, forging stock will produce great resistance to deformation, general forging equipment is not processed at all, therefore adopt the cryogenic forging technology of CN1038353C and CN101311290 patented technology, need to be equipped with corresponding large-sized forging equipment, even possess corresponding large-sized forging equipment arranged, owing to when forging great resistance to deformation is arranged, equipment is had bigger infringement.On the other hand, when adopting cryogenic forging, the accurate control of last forging temperature is difficult to grasp, and the mechanical property fluctuation of product is bigger.Therefore, adopt the cryogenic forging technology to produce non-magnetic drill collar, very high to equipment and processing requirement, corresponding production cost is higher.
According to the introduction of CN101311290 patent, the non-magnetic drill collar intergranular corrosion qualification rate that adopts this patented method to produce is 90%, and have only 50% according to the non-magnetic drill collar intergranular corrosion qualification rate that the CN1038353C patent is produced, intergranular corrosion is very serious breakoff phenomenon, because this corrosion makes intercrystalline forfeiture bonding force, so that the intensity of material almost completely disappears, and is that non-magnetic drill collar performance requriements institute is unallowed, and this hides some dangers for for the safe and reliable use of drill collar.
If the design alloying level is higher, adopt higher final forging temperature, adopt ageing treatment precipitation strength phase subsequently, improve the intensity of alloy, also can produce the non-magnetic alloy that satisfies performance requriements.But because the drill collar size is very big, production lot is also very big, needs to be equipped with large-scale special-purpose Equipment for Heating Processing.
Problems such as non-magnetic drill collar is that the oil drilling industry must be used parts, and at present stone oil drill collar is with the very most of dependence on import of non-magnetic alloy, and domestic blank supply is subject to the desired heavy equipment of cryogenic forging technology, and the quality product fluctuation is big.
Summary of the invention
The object of the present invention is to provide a kind of high-strength tough non-magnetic alloy and preparation method thereof, problems such as the quality product fluctuation is big have been solved, this alloy has that raw materials cost is cheaper, production technique is simple, have stable nonmagnetic energy and anti intercrystalline corrosion ability, do not need large-scale Equipment for Heating Processing and cryogenic forging equipment, only need to adopt normal forging process promptly can produce and satisfy the performance requirement of petroleum industry the non-magnetic drill collar alloy.
High-strong toughness non-magnetic alloy of the present invention can be applied to the non-magnetic drill collar of petroleum industry, but is not limited to this, can be widely used in fields such as automatic control system, precision meter, telecommunication and motor.
Institute of the present invention high-strong toughness non-magnetic alloy, chemical ingredients (weight %):
C：0.14～0.30％；
Si：0.15～0.80％；
Mn：20.00～27.00％；
Ni：0.60～2.00％；
Cr：12.50～19.00％；
Mo, W element a kind of or two kinds: 0.60～2.50%;
V:0.8～[0.1 * Mn (%)-0.5] %; Also can use a kind of of Ti, Nb element or two kinds of parts to substitute V, addition is controlled in 0.6%;
N：0.20～0.50％；
Ca, rare earth element a kind of or two kinds: 0.003～0.05%;
S：≤0.03％；
P：≤0.03％；
Fe: surplus.
In the alloy system of being invented, Mn, N and Ni are the austenite phase region in expansion and the stable carbon iron balance phasor, and C and N have good effect to the stable austenite tissue.The present invention is mainly with Mn, Ni with N enlarges and the stable austenite district, make alloy obtain the austenite structure of single stable, to satisfy the nonmagnetic energy of alloy, under 200 oersted magnetic fields, magnetic permeability μ≤1.01, the add-on of Mn element also produces considerable influence to the mechanical property of alloy simultaneously, and in order to guarantee nonmagnetic energy and mechanical property, the content of Mn must be greater than 20% among the present invention.C is strong formation, the element of stablizing and enlarge the austenitic area, simultaneously with alloy in element such as V form carbide, increase the intensity that C content significantly improves alloy, but reduction corrosion resistance of alloy, especially intergranular corrosion performance, obviously reduce the ballistic work and the stretching plastic of alloy simultaneously, therefore need be controlled in 0.30%.Increase the anti-oxidant and corrosion resistance nature that the Cr constituent content significantly improves alloy,, add 〉=12.5% Cr and minor N i in the steel for guaranteeing the good corrosion resisting property of alloy.The present invention makes full use of the full austenite matrix, with Mo, W, N, the solution strengthening effect of Si, a certain amount of V, Ti and Nb add in the alloy, form a certain amount of carbide, in process of cooling, separate out second phase, reinforced alloys, wherein V is strong carbide forming element, the VC that forms dissolves in matrix when high temperature, separate out fine VC and make the alloy sclerosis in matrix in process of cooling subsequently, thereby obtain high strength and high rigidity, adding massfraction in the alloy is that 0.3% above V just can obtain tangible disperse precipitation strength, formed carbide presents the distribution of tiny even dispersion, intensive improves the tension and the yield strength of alloy, and along with the increase of add-on, its strengthening effect also constantly strengthens, ballistic work and stretching plastic reduction simultaneously is less, can reach the requirement of performance index fully.But with regard to alloy of the present invention, when the add-on of V surpass this patent listed in limited time, the ballistic work and the unit elongation of alloy reduce significantly.V is added in when improving alloy strength, and the magnetic permeability of alloy not have influence substantially, the adding of V in addition, and the avidity of itself and C is greater than Cr, and Cr is separated out in minimizing on crystal boundary
23C
6Thereby, the anti intercrystalline corrosion performance of raising alloy.The adding of Nb and Ti is similar to V substantially to the alloy Effect on Performance, plays additional strengthening effect.Thereby the adding of trace element such as Ca and rare earth can purify the form of alloy, change inclusion improves the forgeability of alloy and final mechanical property greatly.
The manufacture method of high-strength tough non-magnetic alloy of the present invention comprises that alloy forging cogging and last finish-forging are shaped.Wherein melting can be adopted the direct casting ingot-forming of electric furnace; Steel billet is through 1100 ℃～1180 ℃ insulations 2～7 hours, hammer cogging.Final forging temperature is controlled between 940～860 ℃ of scopes, the alloy property requirement that meets the specification.Promptly
(1) cogging temperature: 1100 ℃～1180 ℃, be incubated 2～7 hours, forging ratio 2～3;
(2) finish forge moulding: total forging ratio 〉=5,940～860 ℃ of final forging temperatures.
Embodiment
Embodiment 1
Chemical ingredients presses in the table 1 3614, smithing technological parameter:
Cogging temperature: 1140～1160, final forging temperature: 930.
Mechanical property, magnetic permeability, corrosion resisting property, hot workability are shown in Table 2.
Embodiment 2
Chemical ingredients presses in the table 1 3615, smithing technological parameter:
Cogging temperature: 1140～1160, final forging temperature: 900.
Mechanical property, magnetic permeability, corrosion resisting property, hot workability are shown in Table 2.
Embodiment 3
Chemical ingredients presses in the table 1 3620, smithing technological parameter:
Cogging temperature: 1140～1160, final forging temperature: 910.
Mechanical property, magnetic permeability, corrosion resisting property, hot workability are shown in Table 2.
Embodiment 4
Chemical ingredients presses in the table 1 3625, smithing technological parameter:
Cogging temperature: 1140～1160, final forging temperature: 860.
Mechanical property, magnetic permeability, corrosion resisting property, hot workability are shown in Table 2.
The high-strength tough non-magnetic alloy chemical ingredients of table 1 embodiment of the invention 1～4
| ??C | ??Mn | ??Si | ??Cr | ??Ni | ??Mo | ??W | ??V | ??Ti | ??Nb | ??N | ??RE | ??Ca | ??Fe | |
| ??3614 | ??0.27 | ??20.15 | ??0.46 | ??16.51 | ??1.51 | ??0.71 | ??- | ??1.35 | ??- | ??0.35 | ??0.45 | ??0.02 | ??0.01 | Surplus |
| ??3615 | ??0.15 | ??24.32 | ??0.71 | ??13.32 | ??1.28 | ??0.72 | ??0.69 | ??1.73 | ??- | ??- | ??0.37 | ??0.008 | ??-- | Surplus |
| ??3620 | ??0.28 | ??20.56 | ??0.19 | ??14.73 | ??1.86 | ??1.75 | ??0.48 | ??0.86 | ??0.55 | ??- | ??0.32 | ??-- | ??0.01 | Surplus |
| ??3625 | ??0.22 | ??26.79 | ??0.66 | ??15.49 | ??0.88 | ??0.30 | ??0.69 | ??1.06 | ??0.16 | ??0.22 | ??0.26 | ??0.003 | ??-- | Surplus |
The high-strength tough non-magnetic alloy performance of table 2 embodiment of the invention 1～4
| ??R m(Mpa) | ??R p0.2(Mpa) | ?A 20mm(％) | ??Akv(J) | Magnetic permeability μ | The anti intercrystalline corrosion performance | |
| Diameter 79.4～171.4mm design requirements | ??827 | ??758 | ?18 | ??54 | ??≤1.01 | Excellent |
| Diameter 177.8～279.4mm design requirements | ??758 | ??689 | ?20 | ??68 | ??≤1.01 | Excellent |
| ??3614 | ??990 | ??835 | ?38.5 | ??96.8 | ??1.0032 | Excellent |
| ??3615 | ??1015 | ??860 | ?34.5 | ??92 | ??1.0018 | Excellent |
| ??3620 | ??980 | ??820 | ?41 | ??112 | ??1.0020 | Excellent |
| ??3625 | ??1040 | ??885 | ?32 | ??87 | ??1.0049 | Excellent |
Claims (3)
1. a high-strength tough non-magnetic alloy is characterized in that, chemical component weight percentage ratio is:
C：0.14～0.30％，
Si：0.15～0.80％，
Mn：20.00～27.00％；
Ni：0.60～2.00％；
Cr：12.50～19.00％；
Mo, W element a kind of or two kinds: 0.60～2.50%;
V：0.8～[0.1×Mn(％)-0.5]％；
N：0.20～0.50％；
Ca, rare earth element a kind of or two kinds: 0.003～0.05%;
S：≤0.03％；
P：≤0.03％；
Fe: surplus.
2. high-strength tough non-magnetic alloy according to claim 1 is characterized in that, substitutes V with a kind of of Ti, Nb element or two kinds of parts, and addition is controlled in 0.6%.
3. a method for preparing the described high-strength tough non-magnetic alloy of claim 1 is characterized in that, comprises that alloy forging cogging and last finish-forging are shaped, the following parameter of control in technology:
(1) cogging temperature: 1100 ℃～1180 ℃, be incubated 2～7 hours, forging ratio 2～3;
(2) finish forge moulding: total forging ratio 〉=5,940～860 ℃ of final forging temperatures.
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| CN 201010204067 CN101871082A (en) | 2010-06-21 | 2010-06-21 | High-strength tough non-magnetic alloy and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206175A (en) * | 2013-03-15 | 2013-07-17 | 山西北方风雷工业集团有限公司 | Drill collar with high fatigue resistance |
| CN103600041A (en) * | 2013-11-18 | 2014-02-26 | 乐山力盾铸钢有限公司 | Casting method of high-strength high-hardness anti-marine-corrosion non-magnetic steel |
| CN104109800A (en) * | 2014-07-03 | 2014-10-22 | 武汉钢铁(集团)公司 | High-strength vanadium-containing high-manganese non-magnetic steel and production method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1100176A (en) * | 1993-09-11 | 1995-03-15 | 中国科学院金属研究所 | Steel for high-strength non-magnetic drill collar |
| CN101445890A (en) * | 2008-12-29 | 2009-06-03 | 洛阳双瑞特种装备有限公司 | Novel high-strength and low-magnetic steel |
| CN101538689A (en) * | 2008-03-21 | 2009-09-23 | 宝山钢铁股份有限公司 | Non-magnetic stainless steel with high strength and toughness, manufacturing method and application thereof |
| CN101597721A (en) * | 2009-07-08 | 2009-12-09 | 中原特钢股份有限公司 | Steel for non-magnetic drilling tool and production method thereof |
| CN101660109A (en) * | 2009-09-26 | 2010-03-03 | 河南神龙石油钻具有限公司 | Novel steel for non-magnetic drill collar and preparation method thereof |
| CN101724790A (en) * | 2008-10-23 | 2010-06-09 | 宝山钢铁股份有限公司 | Low-nickel austenitic stainless steel and manufacturing method thereof |
-
2010
- 2010-06-21 CN CN 201010204067 patent/CN101871082A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1100176A (en) * | 1993-09-11 | 1995-03-15 | 中国科学院金属研究所 | Steel for high-strength non-magnetic drill collar |
| CN101538689A (en) * | 2008-03-21 | 2009-09-23 | 宝山钢铁股份有限公司 | Non-magnetic stainless steel with high strength and toughness, manufacturing method and application thereof |
| CN101724790A (en) * | 2008-10-23 | 2010-06-09 | 宝山钢铁股份有限公司 | Low-nickel austenitic stainless steel and manufacturing method thereof |
| CN101445890A (en) * | 2008-12-29 | 2009-06-03 | 洛阳双瑞特种装备有限公司 | Novel high-strength and low-magnetic steel |
| CN101597721A (en) * | 2009-07-08 | 2009-12-09 | 中原特钢股份有限公司 | Steel for non-magnetic drilling tool and production method thereof |
| CN101660109A (en) * | 2009-09-26 | 2010-03-03 | 河南神龙石油钻具有限公司 | Novel steel for non-magnetic drill collar and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206175A (en) * | 2013-03-15 | 2013-07-17 | 山西北方风雷工业集团有限公司 | Drill collar with high fatigue resistance |
| CN103600041A (en) * | 2013-11-18 | 2014-02-26 | 乐山力盾铸钢有限公司 | Casting method of high-strength high-hardness anti-marine-corrosion non-magnetic steel |
| CN103600041B (en) * | 2013-11-18 | 2015-09-30 | 乐山力盾铸钢有限公司 | The casting method of the hard nonmagnetic steel of resistance to marine corrosion of a kind of high-strength height |
| CN104109800A (en) * | 2014-07-03 | 2014-10-22 | 武汉钢铁(集团)公司 | High-strength vanadium-containing high-manganese non-magnetic steel and production method thereof |
| CN104109800B (en) * | 2014-07-03 | 2016-06-29 | 武汉钢铁(集团)公司 | High intensity is containing vanadium height manganese nonmagnetic steel and production method thereof |
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Application publication date: 20101027 |