CN110273110A - A kind of preparation method of oxidation resistant steel - Google Patents

A kind of preparation method of oxidation resistant steel Download PDF

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Publication number
CN110273110A
CN110273110A CN201810203319.2A CN201810203319A CN110273110A CN 110273110 A CN110273110 A CN 110273110A CN 201810203319 A CN201810203319 A CN 201810203319A CN 110273110 A CN110273110 A CN 110273110A
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CN
China
Prior art keywords
temperature
resistant steel
oxidation resistant
preparation
oxidation
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810203319.2A
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Chinese (zh)
Inventor
索忠源
付立铭
王毅坚
单爱党
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Jilin Institute of Chemical Technology
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Jilin Institute of Chemical Technology
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Priority to CN201810203319.2A priority Critical patent/CN110273110A/en
Publication of CN110273110A publication Critical patent/CN110273110A/en
Pending legal-status Critical Current

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    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/002—Heat treatment of ferrous alloys containing Cr
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • 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
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • 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
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • 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
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

The present invention relates to a kind of high-temperature oxidation resistant steel and preparation method thereof, comprising: meets alloy formula steel billet, by parameter and annealings such as the control rate of heat addition, soaking time and cooling rates, obtains oxidation resistant steel finished product.Preparation process of the invention is simple, at low cost, effect is good, and the oxidation resistant steel of acquisition has preferable high-temperature oxidation resistance and high temperature abrasion resistance, therefore, on boiler, burning fire grate segment and the components such as various high-temperature oxidation resistants and high-temperature wearable with good application prospect.

Description

A kind of preparation method of oxidation resistant steel
Technical field
The invention belongs to metal material and its preparation fields, are related to a kind of preparation method of high-temperature oxidation resistant steel.The alloy Suitable in boiler, burning fire grate segment and the components such as various high-temperature oxidation resistants and high-temperature wearable.
Background technique
High-temperature component as burning fire grate segment, boiler liner plate etc, use condition very severe are chronically at flame combustion It burns in high-temperature flue gas, to guarantee the needs effectively burned and controlling the discharge of pernicious gas, such high-temperature component is in work gas Usually oxygen content is very high for atmosphere, therefore is easy to be acted on by strong high temperature oxidation and corrosion.Under such use condition, generally Chrome Heat Resistance Steel material product is shorter usually using the service life, therefore component needs often detection or replacement, and necessary requirement is not achieved；And Using nickelic, high molybdenum heat-resisting alloy, although good in oxidation resistance, the service life is long, at high cost, expensive；It is resistance to using aluminium base, silicon substrate The problems such as thermalloy is again poor with high temperature resistant property, and brittleness is larger, and wearability is insufficient, and preparation is difficult, therefore, it is also difficult to meet city Field requires.
Summary of the invention
The purpose of the present invention is to provide a kind of high temperature oxidative resistances, the good high-temperature oxidation resistant cast steel of wearability, pass through Heat treatment improves the anti-oxidant uniformity of alloy, tissue stabilization after long-time service, have preparation process is simple, relative cost compared with The features such as low.
A kind of the technical solution adopted by the present invention: preparation method of high-temperature oxidation resistant steel, it is characterised in that chemical component (wt%) are as follows: C 0.23 ~ 0.25%, Cr 24 ~ 25%, Al 1 ~ 1.5%, Si 1 ~ 1.7%, Mn 0.2 ~ 0.3%, Mo 0.4 ~ 0.6%, S ≤ 0.01%, P≤0.02%, RE 0.005% ~ 0.01%, remaining is Fe.
The steel billet of above-mentioned formula is subjected to annealing heat-treatment, slab is warming up to 550 ~ 570 DEG C with furnace, 0.5 ~ 1 hour is kept the temperature, 830 ~ 850 DEG C are risen to, keeps the temperature 0.5 ~ 1 hour, finally rises to 1150 ~ 1200 DEG C, soaking time 5-7 hours, each step-up temperature was fast Rate is no more than 3 DEG C/min.It is then cooled to 500 DEG C in 3-5 hours, then comes out and cools down.
Beneficial effects of the present invention: first important technical measures of the invention are that the alloys such as Al, Mo, rare earth member is added Element, wherein forming the oxidation protection of continuous, secured covering and densification in matrix surface oxidation by the ratio of control Al and Cr Film effectively hinders the further oxidation on surface；The heat resistance and high temperature abrasion resistance of steel can be improved in the additional amount of control Mo, thus Improve the service life；The addition of rare earth RE promotes the limited oxidation of Cr and Al, so that alloy quickly forms complete uniform Cr's or Al Oxidation film, and reduce the growth rate of oxidation film, the binding ability of alloy and oxidation film is improved, enhancing antistrip performance is appropriate, The nodularization of carbide is also contributed to simultaneously, reduces the effect of isolating to matrix.Second important technique measure of the invention is to make With higher annealing temperature and soaking time appropriate, distribution of carbides is controlled, the Cr of distribution along crystal boundary is made23C6It gradually dissolves, Cr Element is to micropore diffusion；Grain boundaries carbide significantly reduces, and is in interrupted shape, and occur transgranular dystopy in subsequent cooling procedure It is precipitated, forms rod-short, granular carbide, to improve the inoxidizability of matrix, shorten replacement of products and detection cycle.As a result Show oxidation resistant steel prepared by the present invention by GB/T 13303-1991 " the antioxygenic property measuring method of steel ", oxidation rate is 0.1~1.0g/m2H, inoxidizability rank belong to inoxidizability grade.
The following examples be to further explanation of the invention, rather than limit to protection scope of the present invention.
Embodiment 1
Alloy formula element mass percent are as follows: C 0.236%, Cr 23.8%, Al 1.44%, Si 1.42%, Mn 0.22%, Mo 0.397%, S 0.009%, P 0.018%, rare earth RE:0.005%(La 0.002%, Ce La 0.001%, Y 0.001%, Ru0.001%), Fe surplus, after be put into furnace.
Alloy melting: 300 Kg of electric induction furnace melting, electrified regulation fusing after, adjust the chemical component of molten steel, wherein silicon, Manganese content is adjusted by addition ferrosilicon, manganese iron, and after stokehold detection and adjusting component to requirement, temperature is risen to 1640 ± 10 DEG C, 3% aluminium deoxidation for accounting for Metal Weight is added and adjusts molten steel aluminium component, is adjusted to 1570 ± 5 DEG C or so in molten steel, insertion Whole clinkers are removed after the further deoxidation of 0.2% silico-calcium, stir molten steel, turndown tapping；Metamorphism treatment: by rare earth RE alterant 220 DEG C or less drying after, using poured in packet method to molten steel carry out Metamorphism treatment；Casting: using after water-glass sand carbon dioxide solidification Casting uses, and 1550 ± 5 DEG C of pouring temperature；It unpacks: unpacking after casting 4 hours.
Annealing: product is warming up to 550 DEG C with furnace after unpacking, and stops 1 hour, after rise to 840 DEG C, stop 0.5 hour, finally 1150 DEG C of high annealings are risen to, soaking time 7 hours, wherein each section of heating rate is controlled in 2 DEG C/min, are cooled to the furnace It comes out of the stove after 500 DEG C or less, obtains oxidation resistant steel.
The detection steel alloy, surveys it according to GB/T 13303-1991 " the antioxygenic property measuring method of steel " standard Antioxygenic property, the result is shown in shown in table 1, table 1 provides performance parameter for embodiment 1-3.
Embodiment 2
Alloy formula element mass percent are as follows: C 0.244%, Cr 23.9%, Al 1.35%, Si 1.34%, Mn 0.21%, Mo 0.601%, S 0.008%, P 0.019%, rare earth RE:0.010%(La 0.004%, Ce La 0.002%, Y 0.002%, Ru0.002%), Fe surplus, after be put into furnace.
Alloy melting: 300 Kg of electric induction furnace melting, electrified regulation fusing after, adjust the chemical component of molten steel, wherein silicon, Manganese content is adjusted by addition ferrosilicon, manganese iron, and after stokehold detection and adjusting component to requirement, temperature is risen to 1640 ± 10 DEG C, 3% aluminium deoxidation for accounting for Metal Weight is added and adjusts molten steel aluminium component, is adjusted to 1570 ± 5 DEG C or so in molten steel, insertion Whole clinkers are removed after the further deoxidation of 0.2% silico-calcium, stir molten steel, turndown tapping；Metamorphism treatment: by rare earth RE alterant 220 DEG C or less drying after, using poured in packet method to molten steel carry out Metamorphism treatment；Casting: using after water-glass sand carbon dioxide solidification Casting uses, and 1550 ± 5 DEG C of pouring temperature；It unpacks: unpacking after casting 4 hours.
Annealing: product is warming up to 570 DEG C with furnace after unpacking, and stops 0.5 hour, after rise to 830 DEG C, stop 1 hour, finally 1200 DEG C of high annealings are risen to, soaking time 5 hours, wherein each section of heating rate is controlled in 2 DEG C/min, are cooled to the furnace It comes out of the stove after 500 DEG C or less, obtains oxidation resistant steel.
Embodiment 3
Alloy formula element mass percent are as follows: C 0.245%, Cr 24.3%, Al 1.56%, Si 1.39%, Mn 0.23%, Mo 0.426%, S 0.008%, P 0.017%, rare earth RE:0.006%(La 0.002%, Ce La 0.001%, Y 0.001%, Ru0.002%), Fe surplus, after be put into furnace.
Alloy melting: 300 Kg of electric induction furnace melting, electrified regulation fusing after, adjust the chemical component of molten steel, wherein silicon, Manganese content is adjusted by addition ferrosilicon, manganese iron, and after stokehold detection and adjusting component to requirement, temperature is risen to 1640 ± 10 DEG C, 3% aluminium deoxidation for accounting for Metal Weight is added and adjusts molten steel aluminium component, is adjusted to 1570 ± 5 DEG C or so in molten steel, insertion Whole clinkers are removed after the further deoxidation of 0.2% silico-calcium, stir molten steel, turndown tapping；Metamorphism treatment: by rare earth RE alterant 220 DEG C or less drying after, using poured in packet method to molten steel carry out Metamorphism treatment；Casting: using after water-glass sand carbon dioxide solidification Casting uses, and 1550 ± 5 DEG C of pouring temperature；It unpacks: unpacking after casting 4 hours.
Annealing: product is warming up to 560 DEG C with furnace after unpacking, and stops 0.5 hour, after rise to 850 DEG C, stop 0.5 hour, most After rise to 1160 DEG C of high annealings, soaking time 6 hours, wherein each section of heating rate is controlled in 2 DEG C/min, furnace cooling It comes out of the stove after to 500 DEG C or less, obtains oxidation resistant steel.
The performance comparison of table 1 present invention and other heat resisting steel.
The result shows that oxidation resistant steel provided by the present invention has good high temperature oxidation resistance and wearability.
It is skilled to this field although present invention has been described in detail and some specific embodiments have been cited For technical staff, several adjustment can also be made without departing from the principle of the present invention, these improvement also should belong to this The protection scope of invention.

Claims (2)

1. a kind of high-temperature oxidation resistant steel, it is characterised in that chemical component (wt%) are as follows: C 0.23 ~ 0.25%, Cr 24 ~ 25%, Al 1 ~ 1.5%, Si 1 ~ 1.7%, Mn 0.2 ~ 0.3%, Mo 0.4 ~ 0.6%, S≤0.01%, P≤0.02%, RE 0.005% ~ 0.01%, Remaining is Fe.
2. a kind of preparation method of high-temperature oxidation resistant steel as described in claim 1, it is characterised in that: slab is warming up to furnace 550 ~ 570 DEG C, 0.5 ~ 1 hour is kept the temperature, rises to 830 ~ 850 DEG C, keeps the temperature 0.5 ~ 1 hour, finally rises to 1150 ~ 1200 DEG C, heat preservation Time 5-7 hour, each step-up temperature rate no more than 5 DEG C/min, be then cooled in 3-5 hours 500 DEG C and hereinafter, so After come out and cool down.
CN201810203319.2A 2018-03-13 2018-03-13 A kind of preparation method of oxidation resistant steel Pending CN110273110A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6023187B2 (en) * 1982-05-24 1985-06-06 株式会社日本製鋼所 Thick-walled steel with excellent weldability and sulfide cracking resistance
JPS60162758A (en) * 1984-02-01 1985-08-24 Kawasaki Steel Corp High-toughness steel for welded structure having very large thickness
JP2011157615A (en) * 2010-02-03 2011-08-18 Hitachi Metal Precision:Kk Ferritic stainless cast steel, and cast member obtained by using the same
CN103088265A (en) * 2011-10-28 2013-05-08 曲德毅 High-temperature heat-resistant alloy and preparation method thereof
CN105648345A (en) * 2016-03-02 2016-06-08 上海市环境工程设计科学研究院有限公司 High-strength and high-toughness cast steel resistant to abrasion and corrosion in high temperature and used for incinerator fire grate and preparation method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6023187B2 (en) * 1982-05-24 1985-06-06 株式会社日本製鋼所 Thick-walled steel with excellent weldability and sulfide cracking resistance
JPS60162758A (en) * 1984-02-01 1985-08-24 Kawasaki Steel Corp High-toughness steel for welded structure having very large thickness
JP2011157615A (en) * 2010-02-03 2011-08-18 Hitachi Metal Precision:Kk Ferritic stainless cast steel, and cast member obtained by using the same
CN103088265A (en) * 2011-10-28 2013-05-08 曲德毅 High-temperature heat-resistant alloy and preparation method thereof
CN105648345A (en) * 2016-03-02 2016-06-08 上海市环境工程设计科学研究院有限公司 High-strength and high-toughness cast steel resistant to abrasion and corrosion in high temperature and used for incinerator fire grate and preparation method thereof

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Application publication date: 20190924