CN106048416A - Control method for precipitating hardening type martensitic stainless steel delta ferrite - Google Patents

Control method for precipitating hardening type martensitic stainless steel delta ferrite Download PDF

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Publication number
CN106048416A
CN106048416A CN201610534880.XA CN201610534880A CN106048416A CN 106048416 A CN106048416 A CN 106048416A CN 201610534880 A CN201610534880 A CN 201610534880A CN 106048416 A CN106048416 A CN 106048416A
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control method
delta ferrite
electroslag
ingot
stainless steel
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CN106048416B (en
Inventor
李建
雷德江
黄志永
刘永新
张华国
丁勇
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Sichuan Liuhe Special Metal Materials Co., Ltd.
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SICHUAN LIUHE FORGING Co Ltd
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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
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
    • 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
    • C22C38/02—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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/005—Ferrite
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/008—Martensite
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention discloses a control method for precipitating hardening type martensitic stainless steel delta ferrite. The hardening type martensitic stainless steel delta ferrite comprises, by weight percent, 0.045% to 0.05% of C, 0.1% to 0.3% of Si, 0.85% to 0.9% of Mn, not larger than 0.030% of P, not larger than 0.010% of S, 15.2% to 15.5% of Cr, 4.25% to 4.4% of Ni, 3.3% to 3.5% of Cu, 0.20% to 0.25% of Nb and the balance Fe; needed elements are taken to be melted in a non-vacuum induction furnace; 0.8 kg/ton to 1.0 kg/ton of rare earth element Ce is added into a melted solution along with the flow during tapping, then, pouring is carried out, and an electrode bar is manufactured; the manufactured electrode bar is subject to electroslag secondary remelting, and an electroslag steel ingot is manufactured; the manufactured electroslag ingot is loaded into a heating furnace, and the ingot is taken out of the furnace to be forged into a material; and a stainless steel material produced through the method is uniform in structure, the content of the delta ferrite can be stably controlled to be smaller than or equal to 0.5%, and therefore corrosion resistance of an alloy material is greatly improved, the service life of the material is greatly prolonged, and the good economic benefits and good social benefits are achieved.

Description

A kind of control method of precipitation hardenable martensitic stain less steel delta ferrite
Technical field
The present invention relates to the control method of a kind of rustless steel delta ferrite, be specially a kind of precipitation hardenable martensite stainless The control method of steel delta ferrite, belongs to materials application technical field.
Background technology
Precipitation hardenable martensite stainless steel material has high intensity, toughness and decay resistance, is widely used in The fields such as Aeronautics and Astronautics, electric power, oil, chemical industry, machine-building.But owing to it contains higher ferrite former, as Cr, Si etc., on the one hand, during traditional smelting, electroslag etc., it is difficult to avoid dendritic segregation, cause the richness of ferrite element Collection, thus cause the tissue of precipitation hardenable martensite stainless steel material easily to form delta ferrite, rich in Cr unit in delta ferrite Element, thus cause remaining tissue that Cr-depleted region occurs, the difference of the current potential thus brought is by the corrosion of aggravation material, on the other hand, And existing method produces the stainless steel material uneven microstructure prepared, the delta ferrite level of the stainless steel material of manufacture is more than 0.5%, manufacturing approach craft so that the corrosion resisting property of alloy material and service life are low and traditional is complicated, manufacturing cost High.
Summary of the invention
The purpose of the present invention is that provides a kind of precipitation hardenable martensitic stain less steel δ ferrum to solve the problems referred to above The control method of ferritic, meets the use requirement under complex work environment.
The present invention is achieved through the following technical solutions above-mentioned purpose, a kind of precipitation hardenable martensitic stain less steel δ ferrum element The control method of body, in terms of percentage by weight %, including C:0.045 ~ 0.05%, Si:0.1 ~ 0.3%, Mn:0.85 ~ 0.9%, P: ≤ 0.030%, S :≤0.010%, Cr:15.2 ~ 15.5%, Ni:4.25 ~ 4.4%, Cu:3.3 ~ 3.5%, Nb:0.20 ~ 0.25% and Surplus Fe；
Its control method step is as follows:
Step A, take the melting in non-vacuum induction furnace of required element, smelting temperature 1580 ~ 1640 DEG C；Fusion process regulates The content of each element so that it is weight ratio meets design requirement, is smelted into solution；
Step B, the solution that is smelted in step A is added the rare earth element ce of 0.8-1.0 kg/tonne, so with stream when tapping Rear cast prepares electrode bar；
Step C, by step B prepare electrode bar carry out electroslag secondary remelting, prepare electroslag ingot；
Step D, ESR ingot step C prepared load heating furnace, are heated to 1180-1220 DEG C, come out of the stove after held for some time Forging is become a useful person.
Preferably, the pouring temperature in described step B controls at 1530 DEG C ~ 1550 DEG C.
Preferably, in step C, slag charge used by electroslag remelting, the ratio CaF of each content2:Al2O3:CaO:MgO=80:10:5:5 (%)。
Preferably, in described step C, during electroslag remelting, controlling molten speed is 4.2 ~ 4.8Kg/min.
Preferably, in described step D, calculating according to steel ingot diameter, temperature retention time is 1.2-1.5min/mm.
Preferably, in step D, two upsettings two during forging, are used to pull out technique.
The invention has the beneficial effects as follows: prepared by the control method of this kind of precipitation hardenable martensitic stain less steel delta ferrite Stainless steel material even tissue, can stability contorting delta ferrite level≤0.5%, thus bigger improve the anti-corrosion of alloy material Performance and service life, have good economic benefit and social benefit, has good economic benefit and social benefit, is suitable for promoting Use.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise Embodiment, broadly falls into the scope of protection of the invention.
Embodiment one:
A kind of control method of precipitation hardenable martensitic stain less steel delta ferrite, its control method step is as follows:
Step A, take in terms of percentage by weight %, including C:0.045 ~ 0.05%, Si:0.1 ~ 0.3%, Mn:0.85 ~ 0.9%, P: ≤ 0.030%, S :≤0.010%, Cr:15.2 ~ 15.5%, Ni:4.25 ~ 4.4%, Cu:3.3 ~ 3.5%, Nb:0.20 ~ 0.25% and Surplus Fe is melting in non-vacuum induction furnace, smelting temperature 1580 ~ 1640 DEG C；The content of each element is regulated in fusion process, Make its weight ratio meet design requirement, be smelted into solution；
Step B, the solution that is smelted in step A is added with stream when tapping the rare earth element ce of 0.9 kg/tonne, then water Note prepares electrode bar；
Step C, by step B prepare electrode bar carry out electroslag secondary remelting, prepare electroslag ingot；
Step D, ESR ingot step C prepared load heating furnace, are heated to 1200 DEG C, and coming out of the stove after held for some time is forged into Material.
Pouring temperature in described step B controls at 1530 DEG C ~ 1550 DEG C；In step C, slag charge used by electroslag remelting, respectively The ratio CaF of content2:Al2O3:CaO:MgO=80:10:5:5(%)；In described step C, during electroslag remelting, control molten speed be 4.2 ~ 4.8Kg/min；In described step D, calculating according to steel ingot diameter, temperature retention time is 1.2-1.5min/mm；In step D, forging Technique is pulled out in Shi Caiyong bis-upsetting two.
Embodiment two:
A kind of control method of precipitation hardenable martensitic stain less steel delta ferrite, its control method step is as follows:
Step A, take in terms of percentage by weight %, including C:0.045 ~ 0.05%, Si:0.1 ~ 0.3%, Mn:0.85 ~ 0.9%, P: ≤ 0.030%, S :≤0.010%, Cr:15.2 ~ 15.5%, Ni:4.25 ~ 4.4%, Cu:3.3 ~ 3.5%, Nb:0.20 ~ 0.25% and Surplus Fe is melting in non-vacuum induction furnace, smelting temperature 1580 ~ 1640 DEG C；The content of each element is regulated in fusion process, Make its weight ratio meet design requirement, be smelted into solution；
Step B, the solution that is smelted in step A is added with stream when tapping the rare earth element ce of 1.0 kgs/tonne, then water Note prepares electrode bar；
Step C, by step B prepare electrode bar carry out electroslag secondary remelting, prepare electroslag ingot；
Step D, ESR ingot step C prepared load heating furnace, are heated to 1220 DEG C, and coming out of the stove after held for some time is forged into Material.
Pouring temperature in described step B controls at 1530 DEG C ~ 1550 DEG C；In step C, slag charge used by electroslag remelting, respectively The ratio CaF of content2:Al2O3:CaO:MgO=80:10:5:5(%)；In described step C, during electroslag remelting, control molten speed be 4.2 ~ 4.8Kg/min；In described step D, calculating according to steel ingot diameter, temperature retention time is 1.2-1.5min/mm；In step D, forging Technique is pulled out in Shi Caiyong bis-upsetting two.
Embodiment three:
A kind of control method of precipitation hardenable martensitic stain less steel delta ferrite, its control method step is as follows:
Step A, take in terms of percentage by weight %, including C:0.045 ~ 0.05%, Si:0.1 ~ 0.3%, Mn:0.85 ~ 0.9%, P: ≤ 0.030%, S :≤0.010%, Cr:15.2 ~ 15.5%, Ni:4.25 ~ 4.4%, Cu:3.3 ~ 3.5%, Nb:0.20 ~ 0.25% and Surplus Fe is melting in non-vacuum induction furnace, smelting temperature 1580 ~ 1640 DEG C；The content of each element is regulated in fusion process, Make its weight ratio meet design requirement, be smelted into solution；
Step B, the solution that is smelted in step A is added with stream when tapping the rare earth element ce of 1.0 kgs/tonne, then water Note prepares electrode bar；
Step C, by step B prepare electrode bar carry out electroslag secondary remelting, prepare electroslag ingot；
Step D, ESR ingot step C prepared load heating furnace, are heated to 1220 DEG C, and coming out of the stove after held for some time is forged into Material.
Pouring temperature in described step B controls at 1530 DEG C ~ 1550 DEG C；In step C, slag charge used by electroslag remelting, respectively The ratio CaF of content2:Al2O3:CaO:MgO=80:10:5:5(%)；In described step C, during electroslag remelting, control molten speed be 4.2 ~ 4.8Kg/min；In described step D, calculating according to steel ingot diameter, temperature retention time is 1.2-1.5min/mm；In step D, forging Technique is pulled out in Shi Caiyong bis-upsetting two.
The stainless steel material prepared according to embodiment one, embodiment two and embodiment three, can stability contorting delta ferrite level ≤ 0.5%, thus the bigger corrosion resisting property that improve alloy material and service life, it is possible to meet the use of its working environment Requirement.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie In the case of the spirit or essential attributes of the present invention, it is possible to realize the present invention in other specific forms.Therefore, no matter From the point of view of which point, all should regard embodiment as exemplary, and be nonrestrictive, the scope of the present invention is by appended power Profit requires rather than described above limits, it is intended that all by fall in the implication of equivalency and scope of claim Change is included in the present invention.Should not be considered as limiting involved claim by any reference in claim.
Although moreover, it will be appreciated that this specification is been described by according to embodiment, but the most each embodiment only wraps Containing an independent technical scheme, this narrating mode of description is only that for clarity sake those skilled in the art should Description can also be formed those skilled in the art through appropriately combined as an entirety, the technical scheme in each embodiment May be appreciated other embodiments.

Claims (6)

1. the control method of a precipitation hardenable martensitic stain less steel delta ferrite, it is characterised in that by weight percentage, Including C:0.045 ~ 0.05%, Si:0.1 ~ 0.3%, Mn:0.85 ~ 0.9%, P :≤0.030%, S :≤0.010%, Cr:15.2 ~ 15.5%, Ni:4.25 ~ 4.4%, Cu:3.3 ~ 3.5%, Nb:0.20 ~ 0.25% and surplus Fe；
Its control method step is as follows:
Step A, take the melting in non-vacuum induction furnace of required element, smelting temperature 1580 ~ 1640 DEG C；Fusion process regulates The content of each element so that it is weight ratio meets design requirement, is smelted into solution；
Step B, the solution that is smelted in step A is added the rare earth element ce of 0.8-1.0 kg/tonne, so with stream when tapping Rear cast prepares electrode bar；
Step C, by step B prepare electrode bar carry out electroslag secondary remelting, prepare electroslag ingot；
Step D, ESR ingot step C prepared load heating furnace, are heated to 1180-1220 DEG C, come out of the stove after held for some time Forging is become a useful person.
The control method of a kind of precipitation hardenable martensitic stain less steel delta ferrite the most according to claim 1, its feature exists In: the pouring temperature in described step B controls at 1530 DEG C ~ 1550 DEG C.
The control method of a kind of precipitation hardenable martensitic stain less steel delta ferrite the most according to claim 1, its feature exists In: in step C, slag charge used by electroslag remelting, the ratio of each content is: CaF2:Al2O3:CaO:MgO=80:10:5:5。
The control method of a kind of precipitation hardenable martensitic stain less steel delta ferrite the most according to claim 1, its feature exists In: in described step C, during electroslag remelting, controlling molten speed is 4.2 ~ 4.8Kg/min.
The control method of a kind of precipitation hardenable martensitic stain less steel delta ferrite the most according to claim 1, its feature exists In: in described step D, calculating according to steel ingot diameter, temperature retention time is 1.2-1.5min/mm.
The control method of a kind of precipitation hardenable martensitic stain less steel delta ferrite the most according to claim 1, its feature It is: in step D, during forging, uses two upsettings two to pull out technique.
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106381374A (en) * 2016-11-30 2017-02-08 四川六合锻造股份有限公司 Method for improving transverse impact toughness of 1Cr12Ni3Mo2VN
CN110066968A (en) * 2018-07-26 2019-07-30 西安汇丰精密合金制造有限公司 A kind of manufacturing method of precipitation-hardening stainless steel hot rolled plate
CN110565004A (en) * 2019-09-25 2019-12-13 四川六合特种金属材料股份有限公司 Production method for reducing hot working cracking tendency of Mn18Cr18N retaining ring steel
CN112593059A (en) * 2020-12-02 2021-04-02 成都先进金属材料产业技术研究院有限公司 Thermal deformation method for reducing delta ferrite content in martensitic stainless steel
CN113981326A (en) * 2021-09-30 2022-01-28 江西宝顺昌特种合金制造有限公司 630 stainless steel plate and preparation method thereof

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US20040154706A1 (en) * 2003-02-07 2004-08-12 Buck Robert F. Fine-grained martensitic stainless steel and method thereof
CN103290229A (en) * 2013-05-09 2013-09-11 四川六合锻造股份有限公司 Method for optimizing X12CrMoWVNbN10-1-1 electroslag remelting slag system
CN104313278A (en) * 2014-10-23 2015-01-28 北京科技大学 Method for controlling content of delta ferrite in martensite thermal-resisting steel
CN104328353A (en) * 2014-12-01 2015-02-04 什邡新工金属材料有限公司 Rare-earth-type 0Cr17Ni4Cu4Nb martensitic precipitation-hardening stainless steel and preparation method thereof

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US20040154706A1 (en) * 2003-02-07 2004-08-12 Buck Robert F. Fine-grained martensitic stainless steel and method thereof
CN103290229A (en) * 2013-05-09 2013-09-11 四川六合锻造股份有限公司 Method for optimizing X12CrMoWVNbN10-1-1 electroslag remelting slag system
CN104313278A (en) * 2014-10-23 2015-01-28 北京科技大学 Method for controlling content of delta ferrite in martensite thermal-resisting steel
CN104328353A (en) * 2014-12-01 2015-02-04 什邡新工金属材料有限公司 Rare-earth-type 0Cr17Ni4Cu4Nb martensitic precipitation-hardening stainless steel and preparation method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106381374A (en) * 2016-11-30 2017-02-08 四川六合锻造股份有限公司 Method for improving transverse impact toughness of 1Cr12Ni3Mo2VN
CN110066968A (en) * 2018-07-26 2019-07-30 西安汇丰精密合金制造有限公司 A kind of manufacturing method of precipitation-hardening stainless steel hot rolled plate
CN110565004A (en) * 2019-09-25 2019-12-13 四川六合特种金属材料股份有限公司 Production method for reducing hot working cracking tendency of Mn18Cr18N retaining ring steel
CN112593059A (en) * 2020-12-02 2021-04-02 成都先进金属材料产业技术研究院有限公司 Thermal deformation method for reducing delta ferrite content in martensitic stainless steel
CN112593059B (en) * 2020-12-02 2022-05-24 成都先进金属材料产业技术研究院有限公司 Thermal deformation method for reducing delta ferrite content in martensitic stainless steel
CN113981326A (en) * 2021-09-30 2022-01-28 江西宝顺昌特种合金制造有限公司 630 stainless steel plate and preparation method thereof

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