CN105112804A - AISI410SS martensite stainless steel for valve and preparation process of AISI410SS martensite stainless steel - Google Patents
AISI410SS martensite stainless steel for valve and preparation process of AISI410SS martensite stainless steel Download PDFInfo
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Abstract
The invention belongs to the technical field of metallurgy, and particularly relates to AISI410SS martensite stainless steel for a valve and a preparation process of the AISI410SS martensite stainless steel. By reasonably designing chemical components, the AISI410SS martensite stainless steel is composed of 0.10%-0.15% of C, 0.20%-0.50% of Si, 0.30%-0.60% of Mn, 11.0%-13.5% of Cr, 0-0.6% of Mo, 0.30%-0.60% of Ni, 0-0.020% of S, 0-0.020% of P, 0-0.20% of Cu, 0-0.050% of V, 0.010%-0.080% of Nb, 0-0.00016% of H, 0-0.0035% of O, and the balance Fe and impurity elements, wherein the total content of the impurity elements is smaller than or equal to 1.0%. In the smelting process, high-quality scrap steel, pig iron and sponge iron are selected as furnace charges, electric arc furnace EBT primary melting, LF refining, vacuum degassing (VD), mould casting of a steel ingot and hot charging of the steel ingot are adopted, through an oil and precision combined forging process of upsetting and drawing out of an oil press and forming of a precision forging machine, after a forge piece is subjected to overall conditioning, the strength meets the requirements that Rm is greater than or equal to 655 MPa, Rp 0.2 is greater than or equal to 517 MPa, A is greater than or equal to 18% and Z is greater than or equal to 35%, -29 DEG C impact energy averagely reaches 50 J, -46 DEG C impact energy averagely reaches 38 J, the requirement of API6A standard low temperature toughness AKv is met, the rejection rate of products is reduced, and labor efficiency is improved.
Description
Technical field
The invention belongs to metallurgical technology field, particularly a kind of valve body AISI410SS Martensite Stainless Steel and preparation technology thereof.
Background technology
Valve is the function unit in fluid delivery system, has cut-off, adjustment, water conservancy diversion, prevents the functions such as adverse current, voltage stabilizing, shunting or overflow pressure relief.For the valve of fluid control system, various valves used from the simplest stopping valve to very complicated robot control system(RCS), its kind and specification are quite various.And valve body is a main parts size in valve; Different mechanical manufacturing method is had according to pressure rating.Such as: casting, forging etc.The valve body of mesolow specification adopts casting technique to produce valve body usually.The valve body of mesohigh specification adopts forging process to produce.
Valve part in API6A standard PetroChina Company Limited.'s well head set-up and production tree, main raw is AISI410, AISI4130, AISI4140, this type of material is by the difference of environment for use, temperature rank is divided into K, L, P, R, S, T, U, V seven class, and wherein K level is the highest-60 DEG C of requirements of service requirements, and L is-46 DEG C, P is-29 DEG C, R, S, T, U, V are-18 DEG C, and the mechanical performance index required by above seven classes is all the same, minimum average B configuration ballistic work horizontal 20J, longitudinal 27J.Domesticly can reach the K level i.e. level of-60 DEG C of 27J for AISI4130, AISI4140 material; AISI410 material, the material supplier that can reach P level (-29 DEG C, longitudinal direction >=27J) level is few, and quality is unstable, and Absorbable organic halogens reaches that the material supplier of L level (-46 DEG C, longitudinal direction >=27J) level is domestic at present also not to be had.Along with the continuous increase of global energy usage quantity, petroleum demand amount improves year by year, but drilling operation environment is day by day severe, therefore require anti-low temperature, erosion-resisting valve body material in recent years demand continue vigorous.
Therefore how to design a kind of can stablize to reach API6A and require the oil valve body material of L level (-46 DEG C, longitudinal direction >=27J) day by day urgently, the breakthrough of gordian technique urgent need.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency of the prior art and a kind of stable valve body AISI410SS Martensite Stainless Steel and preparation technology thereof reaching API6A requirement L level is provided.
Technical scheme of the present invention is achieved in that a kind of valve body AISI410SS Martensite Stainless Steel, and its chemical composition design is as follows: C=0.10 ~ 0.15%, Si=0.20 ~ 0.50%, Mn=0.30 ~ 0.60%, Cr=11.0 ~ 13.5%, Mo=0 ~ 0.6%, Ni=0.30 ~ 0.60%, S≤0.020%, P≤0.020%, Cu≤0.20%, V≤0.050%, Nb=0.010 ~ 0.080%, H≤0.00016%, O≤0.0035%, remaining is Fe and impurity element, total impurities constituent content≤1.0%.
A kind of preparation technology of valve body AISI410SS Martensite Stainless Steel:
Step 01: electric arc furnace ET just refines, LF refining, VD vacuum stripping, die casting cast ingot casting and steel ingot are crossed cold after heat and sent forging;
Step 02: heat send ingot heating, 5000t oil press jumping-up, pulling, 1400t precise forging machine shaping and forging annealing;
Step 03: modifier treatment.
Select high-quality steel scrap, the pig iron, sponge iron as furnace charge when smelting in described step 01, steel ingot taked deepfreeze after heat to send.
Ingot is sent to wait to expect at 600 ~ 700 DEG C to heat in step 02,850 DEG C are warming up to the heat-up rate of < 60 DEG C/h after material terminates, be incubated at least 4 hours, 1180 DEG C are warming up to the heat-up rate of < 100 DEG C/h after insulation terminates, be incubated 3 ~ 5 hours, insulation terminates the pulling of rear 5000t oil press jumping-up, controls height after jumping-up coefficient and jumping-up, after ensureing jumping-up, aspect ratio is between 0.6 ~ 0.8, turns 1400t precise forging machine afterwards shaping.
In forging rear annealing in described step 02, forging terminates rear air cooling to 500 ~ 600 DEG C, then be warming up to 650 DEG C and treat material insulation, rise to afterwards 880 DEG C by every 100mm at least 1h be incubated, come out of the stove after insulation terminates air-cooled to 500 ~ 600 DEG C, then be warming up to 650 DEG C by every 100mm at least 10h be incubated, hot school of finally coming out of the stove.
Modifier treatment in step 03, workpiece heat to 600 ~ 650 DEG C preheating 1-2 hour, continue to be warming up to 800 ~ 850 DEG C of preheating insulation 1-2 hour, continue to be warming up to 980 ~ 1010 DEG C of insulation 4-6 hour, then come out of the stove air cooling 90-200s, enter the PAG class water-soluble quenching medium cooling 30-60 minute of 8 ~ 11% concentration afterwards, initial oil temperature is not more than 40 DEG C; Return stove after cooling terminates to be warming up to 700 ~ 720 DEG C and to carry out a tempering 8-10 hour, come out of the stove into the PAG class water-soluble quenching medium but 15-30 minute of 8 ~ 11% concentration afterwards, and then return stove and be warming up to 680 ~ 700 DEG C and carry out double tempering 8-10 hour, the PAG class water-soluble quenching medium cooling of 8 ~ 11% concentration of coming out of the stove afterwards air cooling after 15-30 minute.
Forging is after entirety is modified, and intensity meets the demands (Rm >=655MPa, Rp0.2 >=517MPa, A >=18%, Z >=35%), and-29 DEG C of ballistic works on average can reach 50J, and-46 DEG C of ballistic works on average can reach 38J, meet the requirement of API6A standard cryogenic toughness AKv.
The positively effect that technical scheme of the present invention produces is as follows: the present invention passes through rational designing chemical composition, high-quality steel scrap is selected during smelting, the pig iron, sponge iron is as furnace charge, steel ingot taked deepfreeze after heat to send, by oil press jumping-up, pulling, the shaping forging process of precise forging machine, forging is after entirety is modified, intensity meets the demands (Rm >=655MPa, Rp0.2 >=517MPa, A >=18%, Z >=35%),-29 DEG C of ballistic works on average can reach 50J,-46 DEG C of ballistic works on average can reach 38J, meet the requirement of API6A standard cryogenic toughness AKv, reduce product scrap rate, raise labour efficiency.
Rational designing chemical composition of the present invention.C is austenite former, C content control in reach the standard grade, control high temperature ferrite content; Cr is ferrite former, and Cr content is higher, and can form a large amount of high temperature ferritics in steel, high temperature iron ferritic has a strong impact on low-temperature impact toughness, and Cr content controls rolling off the production line, and control Cr/C≤100, high temperature ferrite content is reduced as far as possible; Ni can significantly improve material to toughness, Ni content control in reach the standard grade; Mo content can improve the intensity of steel, Mo content control in reach the standard grade; Because this steel grade is high Cr Martensite Stainless Steel, easy coarse-grain, mixed crystal, add a certain amount of Nb element energy stabilizing tissue, crystal grain thinning.The low-temperature flexibility of this steel grade is improved by rational chemical composition design.
Select high-quality steel scrap, the pig iron, sponge iron as furnace charge during smelting, make scrap resources recycle, energy-conserving and environment-protective.
The present invention adopts the forging mode of oil, the forging of essence connection, substantially increases production efficiency and material use efficiency.Steel ingot increases oil press jumping-up, pulling operation before the forming, can substantially improve the original columnar organization of steel ingot, make crystal grain fully broken, turn precise forging machine afterwards shaping, because precise forging machine equipment is superior, forging efficiency is high, forging ' s block dimension deviation is little, excellent surface quality, and material use efficiency is high.
During modifier treatment, quench cooled and double tempering cooling all adopt the PAG class water-soluble quenching medium of 8 ~ 11% concentration to cool, compared with traditional oil cooling type of cooling, pollution-free, good cooling results, the PAG class water-soluble quenching medium cooling of quenching employing 8 ~ 11% concentration, the quenching hardness obtained is high, and comprehensive strength is good; Double tempering all adopts the PAG class water-soluble quenching medium of 8 ~ 11% concentration to cool, and can avoid temper brittleness, improves the low-temperature impact toughness of material.
Forging low-temperature impact Absorbable organic halogens after entirety is modified reaches API6A standard L level (-46 DEG C, longitudinal direction >=27J) level, high comprehensive performance.Tensile strength Rm can reach 690 ~ 740MPa, yield strength Rp0.2 can reach 540 ~ 590MPa, unit elongation A can reach 24 ~ 29%, reduction of area Z can reach 65 ~ 70%,-29 DEG C of ballistic works on average can reach 50J, and-46 DEG C of ballistic works on average can reach 38J, not only can meet API6A standard P level (-29 DEG C, longitudinal direction >=27J) level, and Absorbable organic halogens reaches L level (-46 DEG C, longitudinal direction >=27J) level, and there is larger surplus capacity.
Embodiment
A kind of valve body AISI410SS Martensite Stainless Steel, its chemical composition design is as follows: C=0.10 ~ 0.15%, Si=0.20 ~ 0.50%, Mn=0.30 ~ 0.60%, Cr=11.0 ~ 13.5%, Mo=0 ~ 0.6%, Ni=0.30 ~ 0.60%, S≤0.020%, P≤0.020%, Cu≤0.20%, V≤0.050%, Nb=0.010 ~ 0.080%, H≤0.00016%, O≤0.0035%, remaining is Fe and impurity element, total impurities constituent content≤1.0%.
The preparation technology of valve body AISI410SS Martensite Stainless Steel is as follows:
Step 01:1, electric arc furnace ET just refine.Any one or a few material such as preferred high-quality steel scrap, carbon (conjunction) knot steel stub bar (chip), the pig iron, sponge iron composition furnace charge, controls to start carbonoxide, oxidizing temperature, decarburized amount >=0.40%.Control [P]≤0.005% during arc furnace tapping, in tapping process ladle, add enough bulk deoxidation agent, lime and low-carbon ferrochromium alloy baked in right amount, in tapping process, strictly should control the lower quantity of slag well.2, LF refining, refining bag puts in place, feeding aluminum steel 2.0 ~ 4.0m/t, add lime, the slag making materials power transmission slags such as fluorite, scorification opens a certain amount of carbon dust of the rear visual quantity of slag, ferrosilicon powder, aluminium powder, calcium carbide, any one or a few reductor of composite deoxidant carries out deoxidation in batches, add a small amount of carbon dust after slag is white in batches, ferrosilicon powder, aluminium powder, the further deoxidation of any one or a few reductor of composite deoxidant, temperature >=1550 DEG C, add alloy in batches, note refining period adding slag charge adjustment basicity of slag, the white slag hold-time is not less than 15 minutes, before VD, composition adjustment is complete.3, VD vacuum stripping, detects [H], [O] content after VD, controls [H]≤0.00016%, [O]≤0.0035%; Tapping behind weak churning time >=15 of Argon minute.4, ingot casting; conscientiously ingot mold will be selected according to ingot shape before scheduling; and ingot mold inwall is cleared up; guarantee that inwall is without dross, floating ash, ingot mold used is present before mould will carry out preheating, calm time >=5 minutes; deepfreeze was taked after the steel ingot demoulding; adopt argon filling and argon for protecting pouring in mould during cast, adopt stainless steel mould flux, before using, want fully dry.During cast, ingot body to press that lower limit controls the duration of pouring, the riser gating time controls by the middle upper limit, guarantees feeding effect.
Step 02: send ingot to wait to expect at 600 ~ 700 DEG C to heat, 850 DEG C are warming up to the heat-up rate of < 60 DEG C/h after material terminates, be incubated at least 4 hours, 1180 DEG C are warming up to the heat-up rate of < 100 DEG C/h after insulation terminates, be incubated 3 ~ 5 hours, insulation terminates the pulling of rear 5000t oil press jumping-up, controls height after jumping-up coefficient and jumping-up, after ensureing jumping-up, aspect ratio is between 0.6 ~ 0.8, turns 1400t precise forging machine afterwards shaping.Forging terminates rear air cooling to 500 ~ 600 DEG C, then be warming up to 650 DEG C treat material insulation, rise to afterwards 880 DEG C by every 100mm at least 1h be incubated, insulation terminate after come out of the stove air-cooled to 500 ~ 600 DEG C, then be warming up to 650 DEG C by every 100mm at least 10h be incubated, hot school of finally coming out of the stove.
Step 03: modifier treatment, the processing step of described modifier treatment is as follows: workpiece heat to 600 ~ 650 DEG C preheating 1-2 hour, continue to be warming up to 800 ~ 850 DEG C of preheating insulation 1-2 hour, continue to be warming up to 980 ~ 1010 DEG C of insulation 4-6 hour, then come out of the stove air cooling 90-200s, enter the PAG class water-soluble quenching medium cooling 30-60 minute of 8 ~ 11% concentration afterwards, initial oil temperature is not more than 40 DEG C; Return stove after cooling terminates to be warming up to 700 ~ 720 DEG C and to carry out a tempering 8-10 hour, come out of the stove into the PAG class water-soluble quenching medium but 15-30 minute of 8 ~ 11% concentration afterwards, and then return stove and be warming up to 680 ~ 700 DEG C and carry out double tempering 8-10 hour, the PAG class water-soluble quenching medium cooling of 8 ~ 11% concentration of coming out of the stove afterwards air cooling after 15-30 minute.
Other three embodiment process implementing process above-described embodiments, embodiment chemical composition is in table 1, and represent by embodiment 1, embodiment 2, embodiment 3, embodiment 4 respectively, wherein embodiment 1 is above-described embodiment, and embodiment processing parameter is in table 2.
Table 1 embodiment chemical composition
Table 2 embodiment processing parameter
Be processed into standard test specimen according to ASTMA370 after modified, check mechanical property with reference to ASTME8, ASTME23, embodiment 1 ~ 4 mechanical property the results are shown in Table 3.
Table 3 embodiment 1 ~ 4 mechanical property result
From illustrating above and table 3, the present invention passes through rational designing chemical composition, select secondary steel scrap and a small amount of alloy as furnace charge during smelting, by oil, essence connection forging forging process that oil press jumping-up, pulling, precise forging machine are shaping, forging is after entirety is modified, intensity meets the demands (Rm >=655MPa, Rp0.2 >=517MPa, A >=18%, Z >=35%),-29 DEG C of ballistic works on average can reach 50J,-46 DEG C of ballistic works on average can reach 38J, meet the requirement of API6A standard cryogenic toughness AKv, reduce product scrap rate, raise labour efficiency.
Claims (7)
1. a valve body AISI410SS Martensite Stainless Steel, is characterized in that: its chemical composition design is as follows: C=0.10 ~ 0.15%, Si=0.20 ~ 0.50%, Mn=0.30 ~ 0.60%, Cr=11.0 ~ 13.5%, Mo=0 ~ 0.6%, Ni=0.30 ~ 0.60%, S≤0.020%, P≤0.020%, Cu≤0.20%, V≤0.050%, Nb=0.010 ~ 0.080%, H≤0.00016%, O≤0.0035%, remaining is Fe and impurity element, total impurities constituent content≤1.0%.
2. one kind enters the preparation technology of valve body AISI410SS Martensite Stainless Steel according to claim 1:
Step 01: electric arc furnace ET just refines, LF refining, VD vacuum stripping, die casting cast ingot casting and steel ingot are crossed cold after heat and sent forging;
Step 02: heat send ingot heating, 5000t oil press jumping-up, pulling, 1400t precise forging machine shaping and forging annealing;
Step 03: modifier treatment.
3. the preparation technology of valve body AISI410SS Martensite Stainless Steel according to claim 2, it is characterized in that: select high-quality steel scrap, the pig iron, sponge iron as furnace charge when smelting in described step 01, steel ingot taked deepfreeze after heat to send.
4. the preparation technology of valve body AISI410SS Martensite Stainless Steel according to claim 2, it is characterized in that: in step 02, send ingot to wait to expect at 600 ~ 700 DEG C to heat, 850 DEG C are warming up to the heat-up rate of < 60 DEG C/h after material terminates, be incubated at least 4 hours, 1180 DEG C are warming up to the heat-up rate of < 100 DEG C/h after insulation terminates, be incubated 3 ~ 5 hours, insulation terminates the pulling of rear 5000t oil press jumping-up, control height after jumping-up coefficient and jumping-up, after ensureing jumping-up, aspect ratio is between 0.6 ~ 0.8, turn 1400t precise forging machine afterwards shaping.
5. the preparation technology of valve body AISI410SS Martensite Stainless Steel according to claim 2, is characterized in that; In forging rear annealing in described step 02, forging terminates rear air cooling to 500 ~ 600 DEG C, then be warming up to 650 DEG C and treat material insulation, rise to afterwards 880 DEG C by every 100mm at least 1h be incubated, come out of the stove after insulation terminates air-cooled to 500 ~ 600 DEG C, then be warming up to 650 DEG C by every 100mm at least 10h be incubated, hot school of finally coming out of the stove.
6. the preparation technology of valve body AISI410SS Martensite Stainless Steel according to claim 2, it is characterized in that: the modifier treatment in step 03, workpiece heat to 600 ~ 650 DEG C preheating 1-2 hour, continue to be warming up to 800 ~ 850 DEG C of preheating insulation 1-2 hour, continue to be warming up to 980 ~ 1010 DEG C of insulation 4-6 hour, then come out of the stove air cooling 90-200s, and enter the PAG class water-soluble quenching medium cooling 30-60 minute of 8 ~ 11% concentration afterwards, initial oil temperature is not more than 40 DEG C; Return stove after cooling terminates to be warming up to 700 ~ 720 DEG C and to carry out a tempering 8-10 hour, come out of the stove into the PAG class water-soluble quenching medium but 15-30 minute of 8 ~ 11% concentration afterwards, and then return stove and be warming up to 680 ~ 700 DEG C and carry out double tempering 8-10 hour, the PAG class water-soluble quenching medium cooling of 8 ~ 11% concentration of coming out of the stove afterwards air cooling after 15-30 minute.
7. the preparation technology of valve body AISI410SS Martensite Stainless Steel according to claim 6, it is characterized in that: forging is after entirety is modified, intensity meets the demands (Rm >=655MPa, Rp0.2 >=517MPa, A >=18%, Z >=35%),-29 DEG C of ballistic works on average can reach 50J,-46 DEG C of ballistic works on average can reach 38J, meet the requirement of API6A standard cryogenic toughness AKv.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105648357A (en) * | 2016-01-28 | 2016-06-08 | 中原特钢股份有限公司 | Smelting method of martensitic stainless steel for low-temperature impact |
| CN106399860A (en) * | 2016-06-06 | 2017-02-15 | 中原特钢股份有限公司 | Producing and manufacturing method for 1Cr17Ni2 piston rod forged piece |
| CN107747027A (en) * | 2017-10-24 | 2018-03-02 | 上海申江锻造有限公司 | High resistivity, high magnetic permeability 1Cr12Mo martensitic stain less steel rotating shaft process for manufacturing forging |
| CN109207862A (en) * | 2018-11-21 | 2019-01-15 | 马鞍山市恒久特材有限公司 | A kind of wear-resisting type special type steel deep-sea oil valve body and its manufacturing method |
| CN109609879A (en) * | 2018-12-27 | 2019-04-12 | 温州市森马网络技术有限公司 | A kind of lock core high strength steel production method |
| CN110560625A (en) * | 2018-07-03 | 2019-12-13 | 温州中海阀门锻造有限公司 | Valve body forging method |
| CN111519093A (en) * | 2020-04-30 | 2020-08-11 | 江苏金石铸锻有限公司 | Low-temperature-resistant high-strength martensitic stainless steel forging material |
| CN113403528A (en) * | 2021-04-28 | 2021-09-17 | 天津钢管制造有限公司 | H-resistant cable2S shouldOil well pipe capable of being corroded by force and manufacturing method thereof |
| CN114438405A (en) * | 2021-12-27 | 2022-05-06 | 中航卓越锻造（无锡）有限公司 | Low-temperature-resistant oil pipe valve and preparation method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105648357A (en) * | 2016-01-28 | 2016-06-08 | 中原特钢股份有限公司 | Smelting method of martensitic stainless steel for low-temperature impact |
| CN106399860A (en) * | 2016-06-06 | 2017-02-15 | 中原特钢股份有限公司 | Producing and manufacturing method for 1Cr17Ni2 piston rod forged piece |
| CN106399860B (en) * | 2016-06-06 | 2018-01-19 | 中原特钢股份有限公司 | A kind of method for manufacturing of 1Cr17Ni2 piston rods forging |
| CN107747027A (en) * | 2017-10-24 | 2018-03-02 | 上海申江锻造有限公司 | High resistivity, high magnetic permeability 1Cr12Mo martensitic stain less steel rotating shaft process for manufacturing forging |
| CN110560625A (en) * | 2018-07-03 | 2019-12-13 | 温州中海阀门锻造有限公司 | Valve body forging method |
| CN109207862A (en) * | 2018-11-21 | 2019-01-15 | 马鞍山市恒久特材有限公司 | A kind of wear-resisting type special type steel deep-sea oil valve body and its manufacturing method |
| CN109609879A (en) * | 2018-12-27 | 2019-04-12 | 温州市森马网络技术有限公司 | A kind of lock core high strength steel production method |
| CN111519093A (en) * | 2020-04-30 | 2020-08-11 | 江苏金石铸锻有限公司 | Low-temperature-resistant high-strength martensitic stainless steel forging material |
| CN113403528A (en) * | 2021-04-28 | 2021-09-17 | 天津钢管制造有限公司 | H-resistant cable2S shouldOil well pipe capable of being corroded by force and manufacturing method thereof |
| CN114438405A (en) * | 2021-12-27 | 2022-05-06 | 中航卓越锻造（无锡）有限公司 | Low-temperature-resistant oil pipe valve and preparation method thereof |
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Application publication date: 20151202 |
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