CN106756484A - A kind of casing high-strength anti-corrosion steel and its Technology for Heating Processing - Google Patents

A kind of casing high-strength anti-corrosion steel and its Technology for Heating Processing Download PDF

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CN106756484A
CN106756484A CN201611147482.9A CN201611147482A CN106756484A CN 106756484 A CN106756484 A CN 106756484A CN 201611147482 A CN201611147482 A CN 201611147482A CN 106756484 A CN106756484 A CN 106756484A
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steel
cooled
room temperature
crystal grain
heated
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钱燕华
陈平
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Suzhou Saiside Engineering Equipment Co Ltd
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Suzhou Saiside Engineering Equipment 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
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/04—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
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
    • C22C38/40—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
    • 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
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • 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
    • C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
    • 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
    • C21D2211/001—Austenite
    • 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

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  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

The invention discloses a kind of casing high-strength anti-corrosion steel, the mass percent of its chemical composition is：C：0.02 0.04%, Cr:12.5 13.7%, Si：0.25 0.29%, Mn：0.62 0.73%, Ni：0.35 0.42%, Re：0.25 0.29%, Nb：0.17 0.21%, Zr:0.31 0.33%, Se:0.11 0.13%, Ti：0.13 0.15%, Ca：0.35 0.47%, Pd：0.82 0.88%, Co：0.41 0.45%, Mo：0.13 0.21%, S≤0.03%, P≤0.02%, rare earth metal：0.37 0.42%, balance of Fe.Elements C o, Mo of steel alloy of the present invention, Cr, Ti can improve martenaging martempering drag, suppress dislocation substructure and reply；Ni can improve the toughness of ferrite matrix and can make crystal grain refinement, can improve the plasticity and toughness of steel, reduce the cleavage Co that inclines and improve Mo2C-shaped core driving force, promotes tiny, disperse compound containing Mo to separate out.

Description

A kind of casing high-strength anti-corrosion steel and its Technology for Heating Processing
Technical field
The present invention relates to a kind of anticorrosive steel and its heat treatment method, specifically a kind of casing with high-strength anti-corrosion steel and Its Technology for Heating Processing, belongs to metal smelt and processing technology field.
Background technology
Why stainless steel has excellent rust-preventing characteristic and corrosion resistance, be stainless steel surfaces Cr easily with air in oxygen Generation Cr2O3Fine and close passive state oxide-film, the aqueous vapor and oxygen in air are blocked outside, protect base material not continue to be influenceed by oxidation And corrode, even if material is subject to external force or chemical mode destruction surface, Cr in itself2O3Also can rapid regeneration into.Except corrosion resistance it Outward, stainless steel also has the advantages that heat resistance, high temperature corrosion, elevated temperature strength, though another aspect stainless steel machinery property is not Such as carbon steel, but processing hardening phenomenon is height compared with carbon steel, therefore often reaches the requirement of intensity using hardening is processed.Although can reach High intensity, but many weak points are there is also simultaneously, such as：Coarse grains, low-temperature flexibility are poor, intercrystalline corrosion is sensitive, pitting corrosion resistance Poor, poor processability of energy etc..
The content of the invention
The technical problems to be solved by the invention are, for the shortcoming of above prior art, propose a kind of casing with high-strength Degree anticorrosive steel and its Technology for Heating Processing, can not only provide the sufficient intensity of valve, and tool is used under long-term adverse circumstances The characteristics of having corrosion-resistant, wear-resistant and small coefficient of thermal expansion and contraction.
In order to solve the above-mentioned technical problem, the technical scheme is that being accomplished by the following way：A kind of case is provided Body high-strength anti-corrosion steel, the mass percent of its chemical composition is：C：0.02-0.04%, Cr:12.5-13.7%, Si：0.25- 0.29%, Mn：0.62-0.73%, Ni：0.35-0.42%, Re：0.25-0.29%, Nb：0.17-0.21%, Zr:0.31-0.33%, Se:0.11-0.13%, Ti：0.13-0.15%, Ca：0.35-0.47%, Pd：0.82-0.88%, Co：0.41-0.45%, Mo： 0.13-0.21%, S≤0.03%, P≤0.02%, rare earth metal：0.37-0.42%, balance of Fe；
The chemical composition mass percent of the rare earth metal is：Pm：23-28%, Pr：8-12%, Lu：5-7%, Dy：3-6%, Gd： 8-12%, balance of La；
First is mutually austenite in the anticorrosive steel, and second is mutually martensite, the second phase volume percentage at surface to 1/4 thickness It is 4.4-4.8%, 1/4 thickness to center the second phase volume percentage is 5.9-6.4%；The stainless steel is at surface to 1/4 thickness Austenite average crystal grain diameter is 4.6-4.9 μm, and martensite average crystal grain diameter is 4.1-4.5 μm, and 1/4 thickness is difficult to understand to center Family name's body average crystal grain diameter is 5.1-5.3 μm, and martensite average crystal grain diameter is 6.1-6.5 μm.
The technical scheme that further limits of the invention is：Foregoing casing high-strength anti-corrosion steel, the matter of its chemical composition Measuring percentage is：C：0.02%, Cr:12.5%, Si：0.25%, Mn：0.62%, Ni：0.35%, Re：0.25%, Nb：0.17%, Zr: 0.31%, Se:0.11%, Ti：0.13%, Ca：0.35%, Pd：0.82%, Co：0.41%, Mo：0.13%, S≤0.03%, P≤ 0.02%, rare earth metal：0.37%, balance of Fe；
The chemical composition mass percent of the rare earth metal is：Pm：23%, Pr：8%, Lu：5%, Dy：3%, Gd：8%, it is balance of La；
First is mutually austenite in the anticorrosive steel, and second is mutually martensite, the second phase volume percentage at surface to 1/4 thickness It is 4.4%, 1/4 thickness to center the second phase volume percentage is 5.9%；Stainless steel austenite at surface to 1/4 thickness is put down Equal crystal grain diameter is 4.6 μm, and martensite average crystal grain diameter is 4.1 μm, 1/4 thickness to center austenite average crystal grain diameter It it is 5.1 μm, martensite average crystal grain diameter is 6.1 μm.
Foregoing casing high-strength anti-corrosion steel, the mass percent of its chemical composition is：C：0.03%, Cr:12.9%, Si：0.26%, Mn：0.68%, Ni：0.37%, Re：0.27%, Nb：0.19%, Zr:0.32%, Se:0.12%, Ti：0.14%, Ca： 0.38%, Pd：0.85%, Co：0.43%, Mo：0.19%, S≤0.03%, P≤0.02%, rare earth metal：0.40%, balance of Fe；
The chemical composition mass percent of the rare earth metal is：Pm：26%, Pr：10%, Lu：6%, Dy：5%, Gd：10%, surplus It is La；
First is mutually austenite in the anticorrosive steel, and second is mutually martensite, the second phase volume percentage at surface to 1/4 thickness It is 4.6%, 1/4 thickness to center the second phase volume percentage is 6.1%；Stainless steel austenite at surface to 1/4 thickness is put down Equal crystal grain diameter is 4.8 μm, and martensite average crystal grain diameter is 4.3 μm, 1/4 thickness to center austenite average crystal grain diameter It it is 5.2 μm, martensite average crystal grain diameter is 6.3 μm.
Foregoing casing high-strength anti-corrosion steel, the mass percent of its chemical composition is：C：0.04%, Cr:13.7%, Si：0.29%, Mn：0.73%, Ni：0.42%, Re：0.29%, Nb：0.21%, Zr:0.33%, Se:0.13%, Ti：0.15%, Ca： 0.47%, Pd：0.88%, Co：0.45%, Mo：0.21%, S≤0.03%, P≤0.02%, rare earth metal：0.42%, balance of Fe；
The chemical composition mass percent of the rare earth metal is：Pm：28%, Pr：12%, Lu：7%, Dy：6%, Gd：12%, surplus It is La；
First is mutually austenite in the anticorrosive steel, and second is mutually martensite, the second phase volume percentage at surface to 1/4 thickness It is 4.8%, 1/4 thickness to center the second phase volume percentage is 6.4%；Stainless steel austenite at surface to 1/4 thickness is put down Equal crystal grain diameter is 4.9 μm, and martensite average crystal grain diameter is 4.5 μm, 1/4 thickness to center austenite average crystal grain diameter It it is 5.3 μm, martensite average crystal grain diameter is 6.5 μm.
A kind of casing high-strength anti-corrosion Heat-Treatment of Steel technique, comprises the following steps：
Step 1：By heat steel to 580-610 DEG C, and 35-40min is incubated, then with atomization cooling with the speed of 10-15 DEG C/s Degree is cooled to room temperature, is then heated to 830-850 DEG C, and room temperature is cooled to the cooling velocity of 8-10 DEG C/s with oil cooling；
Step 2：Steel are put into 980-990 DEG C is heated in heating furnace, 1-3 hours is incubated, then using water-cooled, with 20-25 DEG C/speed of s is cooled to room temperature, is then heated to 650-670 DEG C with the speed of 5-8 DEG C/s again, is incubated 5-8 hours, Ran Houkong It is cooled to room temperature；
Step 3：Steel are carried out with double tempering, is tempered for the first time：Fork is heated to 545-565 DEG C, after tempering 30-40min, Insulation 2-3min, makes steel equalizing temperature, uses the mode of water-cooled to be cooled to 380- with the cooldown rate of 23-25 DEG C/s afterwards After 390 DEG C, then it is air cooled to room temperature；
It is tempered for second：By heat steel to 710-720 DEG C, it is tempered 1-3 hours, is then air cooled to room temperature.
Foregoing casing high-strength anti-corrosion Heat-Treatment of Steel technique, comprises the following steps：
Step 1：By heat steel to 580 DEG C, and 35min is incubated, room is then cooled to the speed of 10 DEG C/s with atomization cooling Temperature, is then heated to 830 DEG C, and room temperature is cooled to the cooling velocity of 8 DEG C/s with oil cooling；
Step 2：Steel are put into 980 DEG C are heated in heating furnace, 1 hour is incubated, then using water-cooled, with the speed of 20 DEG C/s Room temperature is cooled to, then 650 DEG C is heated to the speed of 5 DEG C/s again, 5 hours are incubated, room temperature is then air cooled to；
Step 3：Steel are carried out with double tempering, is tempered for the first time：Fork is heated to 545 DEG C, after tempering 30min, insulation 2min, makes steel equalizing temperature, after using the mode of water-cooled to be cooled to 380 DEG C with the cooldown rate of 23 DEG C/s afterwards then empty It is cooled to room temperature；
It is tempered for second：By heat steel to 710 DEG C, it is tempered 1 hour, is then air cooled to room temperature.
Foregoing casing high-strength anti-corrosion Heat-Treatment of Steel technique, comprises the following steps：
Step 1：By heat steel to 595 DEG C, and 38min is incubated, room is then cooled to the speed of 12 DEG C/s with atomization cooling Temperature, is then heated to 840 DEG C, and room temperature is cooled to the cooling velocity of 9 DEG C/s with oil cooling；
Step 2：Steel are put into 980 DEG C are heated in heating furnace, 2 hours are incubated, then using water-cooled, with the speed of 22 DEG C/s Room temperature is cooled to, then 660 DEG C is heated to the speed of 7 DEG C/s again, 7 hours are incubated, room temperature is then air cooled to；
Step 3：Steel are carried out with double tempering, is tempered for the first time：Fork is heated to 550 DEG C, after tempering 35min, insulation 3min, makes steel equalizing temperature, after using the mode of water-cooled to be cooled to 385 DEG C with the cooldown rate of 24 DEG C/s afterwards then empty It is cooled to room temperature；
It is tempered for second：By heat steel to 715 DEG C, it is tempered 2 hours, is then air cooled to room temperature.
Further, foregoing casing high-strength anti-corrosion Heat-Treatment of Steel technique, comprises the following steps：
Step 1：By heat steel to 610 DEG C, and 40min is incubated, room is then cooled to the speed of 15 DEG C/s with atomization cooling Temperature, is then heated to 850 DEG C, and room temperature is cooled to the cooling velocity of 10 DEG C/s with oil cooling；
Step 2：Steel are put into 990 DEG C are heated in heating furnace, 3 hours are incubated, then using water-cooled, with the speed of 25 DEG C/s Room temperature is cooled to, then 670 DEG C is heated to the speed of 8 DEG C/s again, 8 hours are incubated, room temperature is then air cooled to；
Step 3：Steel are carried out with double tempering, is tempered for the first time：Fork is heated to 565 DEG C, after tempering 40min, insulation 3min, makes steel equalizing temperature, after using the mode of water-cooled to be cooled to 390 DEG C with the cooldown rate of 25 DEG C/s afterwards then empty It is cooled to room temperature；
It is tempered for second：By heat steel to 720 DEG C, it is tempered 3 hours, is then air cooled to room temperature.
The beneficial effects of the invention are as follows：Alloying element Co, Mo, Cr, Ti can improve martenaging martempering drag, suppress dislocation sub- Structure is replied；Ni can improve the toughness of ferrite matrix and can make crystal grain refinement, can improve the plasticity and toughness of steel, reduce cleavage The Co that inclines improves Mo2C-shaped core driving force, promotes tiny, disperse compound containing Mo to separate out；Ni and Co collective effects promote Fe3C and Mo2C-shaped is into further enhancing post-curing effect；Mo suppresses temper brittleness.The reasonable coordination of Ni-Co-Mo-Me, makes steel Obtain good obdurability.Corrosion resisting steel is in low pH and Cl high-Under the acid solution corrosive environment of content, with excellent resistance to Spot corrosion, homogeneous corrosion performance, mother metal uniform corrosion rate corrode in 0.3 mm/a or so, weld-fusion line and mother metal crossover position Step depth is below 10 μm.
Specific embodiment
The present invention is described in further detail below：
Embodiment 1
A kind of casing high-strength anti-corrosion steel that the present embodiment is provided, the mass percent of its chemical composition is：C：0.02%, Cr: 12.5%, Si：0.25%, Mn：0.62%, Ni：0.35%, Re：0.25%, Nb：0.17%, Zr:0.31%, Se:0.11%, Ti： 0.13%, Ca：0.35%, Pd：0.82%, Co：0.41%, Mo：0.13%, S≤0.03%, P≤0.02%, rare earth metal：0.37%, Balance of Fe；
The chemical composition mass percent of the rare earth metal is：Pm：23%, Pr：8%, Lu：5%, Dy：3%, Gd：8%, it is balance of La；
First is mutually austenite in the anticorrosive steel, and second is mutually martensite, the second phase volume percentage at surface to 1/4 thickness It is 4.4%, 1/4 thickness to center the second phase volume percentage is 5.9%；Stainless steel austenite at surface to 1/4 thickness is put down Equal crystal grain diameter is 4.6 μm, and martensite average crystal grain diameter is 4.1 μm, 1/4 thickness to center austenite average crystal grain diameter It it is 5.1 μm, martensite average crystal grain diameter is 6.1 μm.
The present embodiment discloses a kind of casing high-strength anti-corrosion Heat-Treatment of Steel technique, comprises the following steps：
Step 1：By heat steel to 580 DEG C, and 35min is incubated, room is then cooled to the speed of 10 DEG C/s with atomization cooling Temperature, is then heated to 830 DEG C, and room temperature is cooled to the cooling velocity of 8 DEG C/s with oil cooling；
Step 2：Steel are put into 980 DEG C are heated in heating furnace, 1 hour is incubated, then using water-cooled, with the speed of 20 DEG C/s Room temperature is cooled to, then 650 DEG C is heated to the speed of 5 DEG C/s again, 5 hours are incubated, room temperature is then air cooled to；
Step 3：Steel are carried out with double tempering, is tempered for the first time：Fork is heated to 545 DEG C, after tempering 30min, insulation 2min, makes steel equalizing temperature, after using the mode of water-cooled to be cooled to 380 DEG C with the cooldown rate of 23 DEG C/s afterwards then empty It is cooled to room temperature；
It is tempered for second：By heat steel to 710 DEG C, it is tempered 1 hour, is then air cooled to room temperature.
Embodiment 2
A kind of casing high-strength anti-corrosion steel that the present embodiment is provided, the mass percent of its chemical composition is：C：0.03%, Cr: 12.9%, Si：0.26%, Mn：0.68%, Ni：0.37%, Re：0.27%, Nb：0.19%, Zr:0.32%, Se:0.12%, Ti： 0.14%, Ca：0.38%, Pd：0.85%, Co：0.43%, Mo：0.19%, S≤0.03%, P≤0.02%, rare earth metal：0.40%, Balance of Fe；
The chemical composition mass percent of the rare earth metal is：Pm：26%, Pr：10%, Lu：6%, Dy：5%, Gd：10%, surplus It is La；
First is mutually austenite in the anticorrosive steel, and second is mutually martensite, the second phase volume percentage at surface to 1/4 thickness It is 4.6%, 1/4 thickness to center the second phase volume percentage is 6.1%；Stainless steel austenite at surface to 1/4 thickness is put down Equal crystal grain diameter is 4.8 μm, and martensite average crystal grain diameter is 4.3 μm, 1/4 thickness to center austenite average crystal grain diameter It it is 5.2 μm, martensite average crystal grain diameter is 6.3 μm.
The casing of the present embodiment high-strength anti-corrosion Heat-Treatment of Steel technique, comprises the following steps：
Step 1：By heat steel to 595 DEG C, and 38min is incubated, room is then cooled to the speed of 12 DEG C/s with atomization cooling Temperature, is then heated to 840 DEG C, and room temperature is cooled to the cooling velocity of 9 DEG C/s with oil cooling；
Step 2：Steel are put into 980 DEG C are heated in heating furnace, 2 hours are incubated, then using water-cooled, with the speed of 22 DEG C/s Room temperature is cooled to, then 660 DEG C is heated to the speed of 7 DEG C/s again, 7 hours are incubated, room temperature is then air cooled to；
Step 3：Steel are carried out with double tempering, is tempered for the first time：Fork is heated to 550 DEG C, after tempering 35min, insulation 3min, makes steel equalizing temperature, after using the mode of water-cooled to be cooled to 385 DEG C with the cooldown rate of 24 DEG C/s afterwards then empty It is cooled to room temperature；
It is tempered for second：By heat steel to 715 DEG C, it is tempered 2 hours, is then air cooled to room temperature.
Embodiment 3
A kind of casing high-strength anti-corrosion steel that the present embodiment is provided, the mass percent of its chemical composition is：C：0.04%, Cr: 13.7%, Si：0.29%, Mn：0.73%, Ni：0.42%, Re：0.29%, Nb：0.21%, Zr:0.33%, Se:0.13%, Ti： 0.15%, Ca：0.47%, Pd：0.88%, Co：0.45%, Mo：0.21%, S≤0.03%, P≤0.02%, rare earth metal：0.42%, Balance of Fe；
The chemical composition mass percent of the rare earth metal is：Pm：28%, Pr：12%, Lu：7%, Dy：6%, Gd：12%, surplus It is La；
First is mutually austenite in the anticorrosive steel, and second is mutually martensite, the second phase volume percentage at surface to 1/4 thickness It is 4.8%, 1/4 thickness to center the second phase volume percentage is 6.4%；Stainless steel austenite at surface to 1/4 thickness is put down Equal crystal grain diameter is 4.9 μm, and martensite average crystal grain diameter is 4.5 μm, 1/4 thickness to center austenite average crystal grain diameter It it is 5.3 μm, martensite average crystal grain diameter is 6.5 μm.
The casing of the present embodiment high-strength anti-corrosion Heat-Treatment of Steel technique, comprises the following steps：
Step 1：By heat steel to 610 DEG C, and 40min is incubated, room is then cooled to the speed of 15 DEG C/s with atomization cooling Temperature, is then heated to 850 DEG C, and room temperature is cooled to the cooling velocity of 10 DEG C/s with oil cooling；
Step 2：Steel are put into 990 DEG C are heated in heating furnace, 3 hours are incubated, then using water-cooled, with the speed of 25 DEG C/s Room temperature is cooled to, then 670 DEG C is heated to the speed of 8 DEG C/s again, 8 hours are incubated, room temperature is then air cooled to；
Step 3：Steel are carried out with double tempering, is tempered for the first time：Fork is heated to 565 DEG C, after tempering 40min, insulation 3min, makes steel equalizing temperature, after using the mode of water-cooled to be cooled to 390 DEG C with the cooldown rate of 25 DEG C/s afterwards then empty It is cooled to room temperature；
It is tempered for second：By heat steel to 720 DEG C, it is tempered 3 hours, is then air cooled to room temperature.
Above example is only explanation technological thought of the invention, it is impossible to limit protection scope of the present invention with this, every According to technological thought proposed by the present invention, any change done on the basis of technical scheme each falls within the scope of the present invention Within.

Claims (8)

1. a kind of casing high-strength anti-corrosion steel, it is characterised in that：The mass percent of its chemical composition is：C：0.02- 0.04%, Cr:12.5-13.7%, Si：0.25-0.29%, Mn：0.62-0.73%, Ni：0.35-0.42%, Re：0.25-0.29%, Nb：0.17-0.21%, Zr:0.31-0.33%, Se:0.11-0.13%, Ti：0.13-0.15%, Ca：0.35-0.47%, Pd： 0.82-0.88%, Co：0.41-0.45%, Mo：0.13-0.21%, S≤0.03%, P≤0.02%, rare earth metal：0.37- 0.42%, balance of Fe；
The chemical composition mass percent of the rare earth metal is：Pm：23-28%, Pr：8-12%, Lu：5-7%, Dy：3-6%, Gd： 8-12%, balance of La；
First is mutually austenite in the anticorrosive steel, and second is mutually martensite, the second phase volume percentage at surface to 1/4 thickness It is 4.4-4.8%, 1/4 thickness to center the second phase volume percentage is 5.9-6.4%；The stainless steel is at surface to 1/4 thickness Austenite average crystal grain diameter is 4.6-4.9 μm, and martensite average crystal grain diameter is 4.1-4.5 μm, and 1/4 thickness is difficult to understand to center Family name's body average crystal grain diameter is 5.1-5.3 μm, and martensite average crystal grain diameter is 6.1-6.5 μm.
2. casing according to claim 1 high-strength anti-corrosion steel, it is characterised in that：The mass percent of its chemical composition For：C：0.02%, Cr:12.5%, Si：0.25%, Mn：0.62%, Ni：0.35%, Re：0.25%, Nb：0.17%, Zr:0.31%, Se: 0.11%, Ti：0.13%, Ca：0.35%, Pd：0.82%, Co：0.41%, Mo：0.13%, S≤0.03%, P≤0.02%, rare earth gold Category：0.37%, balance of Fe；
The chemical composition mass percent of the rare earth metal is：Pm：23%, Pr：8%, Lu：5%, Dy：3%, Gd：8%, it is balance of La；
First is mutually austenite in the anticorrosive steel, and second is mutually martensite, the second phase volume percentage at surface to 1/4 thickness It is 4.4%, 1/4 thickness to center the second phase volume percentage is 5.9%；Stainless steel austenite at surface to 1/4 thickness is put down Equal crystal grain diameter is 4.6 μm, and martensite average crystal grain diameter is 4.1 μm, 1/4 thickness to center austenite average crystal grain diameter It it is 5.1 μm, martensite average crystal grain diameter is 6.1 μm.
3. casing according to claim 1 high-strength anti-corrosion steel, it is characterised in that：The mass percent of its chemical composition For：C：0.03%, Cr:12.9%, Si：0.26%, Mn：0.68%, Ni：0.37%, Re：0.27%, Nb：0.19%, Zr:0.32%, Se: 0.12%, Ti：0.14%, Ca：0.38%, Pd：0.85%, Co：0.43%, Mo：0.19%, S≤0.03%, P≤0.02%, rare earth gold Category：0.40%, balance of Fe；
The chemical composition mass percent of the rare earth metal is：Pm：26%, Pr：10%, Lu：6%, Dy：5%, Gd：10%, surplus It is La；
First is mutually austenite in the anticorrosive steel, and second is mutually martensite, the second phase volume percentage at surface to 1/4 thickness It is 4.6%, 1/4 thickness to center the second phase volume percentage is 6.1%；Stainless steel austenite at surface to 1/4 thickness is put down Equal crystal grain diameter is 4.8 μm, and martensite average crystal grain diameter is 4.3 μm, 1/4 thickness to center austenite average crystal grain diameter It it is 5.2 μm, martensite average crystal grain diameter is 6.3 μm.
4. casing according to claim 1 high-strength anti-corrosion steel, it is characterised in that：The mass percent of its chemical composition For：C：0.04%, Cr:13.7%, Si：0.29%, Mn：0.73%, Ni：0.42%, Re：0.29%, Nb：0.21%, Zr:0.33%, Se:0.13%, Ti：0.15%, Ca：0.47%, Pd：0.88%, Co：0.45%, Mo：0.21%, S≤0.03%, P≤0.02% are dilute Earth metal：0.42%, balance of Fe；
The chemical composition mass percent of the rare earth metal is：Pm：28%, Pr：12%, Lu：7%, Dy：6%, Gd：12%, surplus It is La；
First is mutually austenite in the anticorrosive steel, and second is mutually martensite, the second phase volume percentage at surface to 1/4 thickness It is 4.8%, 1/4 thickness to center the second phase volume percentage is 6.4%；Stainless steel austenite at surface to 1/4 thickness is put down Equal crystal grain diameter is 4.9 μm, and martensite average crystal grain diameter is 4.5 μm, 1/4 thickness to center austenite average crystal grain diameter It it is 5.3 μm, martensite average crystal grain diameter is 6.5 μm.
5. casing according to claim 1 high-strength anti-corrosion Heat-Treatment of Steel technique, it is characterised in that including following step Suddenly：
Step 1：By heat steel to 580-610 DEG C, and 35-40min is incubated, then with atomization cooling with the speed of 10-15 DEG C/s Degree is cooled to room temperature, is then heated to 830-850 DEG C, and room temperature is cooled to the cooling velocity of 8-10 DEG C/s with oil cooling；
Step 2：Steel are put into 980-990 DEG C is heated in heating furnace, 1-3 hours is incubated, then using water-cooled, with 20-25 DEG C/speed of s is cooled to room temperature, is then heated to 650-670 DEG C with the speed of 5-8 DEG C/s again, is incubated 5-8 hours, Ran Houkong It is cooled to room temperature；
Step 3：Steel are carried out with double tempering, is tempered for the first time：Fork is heated to 545-565 DEG C, after tempering 30-40min, Insulation 2-3min, makes steel equalizing temperature, uses the mode of water-cooled to be cooled to 380- with the cooldown rate of 23-25 DEG C/s afterwards After 390 DEG C, then it is air cooled to room temperature；
It is tempered for second：By heat steel to 710-720 DEG C, it is tempered 1-3 hours, is then air cooled to room temperature.
6. casing according to claim 5 high-strength anti-corrosion Heat-Treatment of Steel technique, it is characterised in that including following step Suddenly：
Step 1：By heat steel to 580 DEG C, and 35min is incubated, room is then cooled to the speed of 10 DEG C/s with atomization cooling Temperature, is then heated to 830 DEG C, and room temperature is cooled to the cooling velocity of 8 DEG C/s with oil cooling；
Step 2：Steel are put into 980 DEG C are heated in heating furnace, 1 hour is incubated, then using water-cooled, with the speed of 20 DEG C/s Room temperature is cooled to, then 650 DEG C is heated to the speed of 5 DEG C/s again, 5 hours are incubated, room temperature is then air cooled to；
Step 3：Steel are carried out with double tempering, is tempered for the first time：Fork is heated to 545 DEG C, after tempering 30min, insulation 2min, makes steel equalizing temperature, after using the mode of water-cooled to be cooled to 380 DEG C with the cooldown rate of 23 DEG C/s afterwards then empty It is cooled to room temperature；
It is tempered for second：By heat steel to 710 DEG C, it is tempered 1 hour, is then air cooled to room temperature.
7. casing according to claim 5 high-strength anti-corrosion Heat-Treatment of Steel technique, it is characterised in that including following step Suddenly：
Step 1：By heat steel to 595 DEG C, and 38min is incubated, room is then cooled to the speed of 12 DEG C/s with atomization cooling Temperature, is then heated to 840 DEG C, and room temperature is cooled to the cooling velocity of 9 DEG C/s with oil cooling；
Step 2：Steel are put into 980 DEG C are heated in heating furnace, 2 hours are incubated, then using water-cooled, with the speed of 22 DEG C/s Room temperature is cooled to, then 660 DEG C is heated to the speed of 7 DEG C/s again, 7 hours are incubated, room temperature is then air cooled to；
Step 3：Steel are carried out with double tempering, is tempered for the first time：Fork is heated to 550 DEG C, after tempering 35min, insulation 3min, makes steel equalizing temperature, after using the mode of water-cooled to be cooled to 385 DEG C with the cooldown rate of 24 DEG C/s afterwards then empty It is cooled to room temperature；
It is tempered for second：By heat steel to 715 DEG C, it is tempered 2 hours, is then air cooled to room temperature.
8. casing according to claim 5 high-strength anti-corrosion Heat-Treatment of Steel technique, it is characterised in that including following step Suddenly：
Step 1：By heat steel to 610 DEG C, and 40min is incubated, room is then cooled to the speed of 15 DEG C/s with atomization cooling Temperature, is then heated to 850 DEG C, and room temperature is cooled to the cooling velocity of 10 DEG C/s with oil cooling；
Step 2：Steel are put into 990 DEG C are heated in heating furnace, 3 hours are incubated, then using water-cooled, with the speed of 25 DEG C/s Room temperature is cooled to, then 670 DEG C is heated to the speed of 8 DEG C/s again, 8 hours are incubated, room temperature is then air cooled to；
Step 3：Steel are carried out with double tempering, is tempered for the first time：Fork is heated to 565 DEG C, after tempering 40min, insulation 3min, makes steel equalizing temperature, after using the mode of water-cooled to be cooled to 390 DEG C with the cooldown rate of 25 DEG C/s afterwards then empty It is cooled to room temperature；
It is tempered for second：By heat steel to 720 DEG C, it is tempered 3 hours, is then air cooled to room temperature.
CN201611147482.9A 2016-12-13 2016-12-13 A kind of casing high-strength anti-corrosion steel and its Technology for Heating Processing Pending CN106756484A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5696052A (en) * 1979-12-29 1981-08-03 Nippon Steel Corp Low sulfur steel with hydrogen sulfide crack resistance
JP2005139485A (en) * 2003-11-05 2005-06-02 Nippon Steel Corp Steel sheet to be hot-formed
CN104630651A (en) * 2015-02-09 2015-05-20 苏州市神龙门窗有限公司 Stainless steel for housing metal doors and windows and preparation method thereof
CN104651742A (en) * 2015-02-09 2015-05-27 苏州市神龙门窗有限公司 High-strength anticorrosive stainless steel for metal doors and windows and processing process of high-strength anticorrosive stainless steel
CN104762564A (en) * 2015-03-20 2015-07-08 苏州科胜仓储物流设备有限公司 Stainless steel used for transporting carriage steel pipe and preparation method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5696052A (en) * 1979-12-29 1981-08-03 Nippon Steel Corp Low sulfur steel with hydrogen sulfide crack resistance
JP2005139485A (en) * 2003-11-05 2005-06-02 Nippon Steel Corp Steel sheet to be hot-formed
CN104630651A (en) * 2015-02-09 2015-05-20 苏州市神龙门窗有限公司 Stainless steel for housing metal doors and windows and preparation method thereof
CN104651742A (en) * 2015-02-09 2015-05-27 苏州市神龙门窗有限公司 High-strength anticorrosive stainless steel for metal doors and windows and processing process of high-strength anticorrosive stainless steel
CN104762564A (en) * 2015-03-20 2015-07-08 苏州科胜仓储物流设备有限公司 Stainless steel used for transporting carriage steel pipe and preparation method thereof

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Application publication date: 20170531