CN106636959A - High-strength anticorrosion steel for gas valve and heat treatment process of high-strength anticorrosion steel - Google Patents

High-strength anticorrosion steel for gas valve and heat treatment process of high-strength anticorrosion steel Download PDF

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CN106636959A
CN106636959A CN201611147907.6A CN201611147907A CN106636959A CN 106636959 A CN106636959 A CN 106636959A CN 201611147907 A CN201611147907 A CN 201611147907A CN 106636959 A CN106636959 A CN 106636959A
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steel
cooled
room temperature
heated
crystal grain
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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
    • 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
    • C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
    • 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
    • C21D6/007—Heat treatment of ferrous alloys containing Co
    • 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
    • C22C38/002—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
    • C22C38/02—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
    • C22C38/40—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
    • 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
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
    • 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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Abstract

The invention discloses high-strength anticorrosion steel for a gas valve. The high-strength anticorrosion steel is composed of, by mass, 0.02-0.04% of C, 10.5-11.7% of Cr, 0.15-0.19% of Si, 0.62-0.73% of Mn, 0.45-0.52% of Ni, 0.15-0.17% of Re, 0.27-0.38% of Nb, 0.31-0.33% of Al, 0.11-0.13% of Y, 0.13-0.15% of Ti, 0.75-0.77% of Ca, 0.82-0.88% of B, 0.41-0.45% of Co, 0.23-0.31% of Mo, less than or equal to 0.03% S, less than or equal to 0.02% of P, 0.23-0.36% of rare earth metal and the balance Fe. The alloy elements of Co, Mo, Cr and Ti in the high-strength anticorrosion steel can improve the martensite tempering resistance and suppress dislocation substructure recovery; and Ni can improve the toughness of ferrite matrixes and refine crystal particles, the plasticity and toughness of the steel can be improved, the cleavage tendency is reduced, the nuclear driving force of Mo2C is improved through Co, and precipitation of fine and dispersed compounds containing Mo is facilitated.

Description

A kind of burnt gas valve 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 burnt gas valve high-strength anti-corrosion Steel and its Technology for Heating Processing, belong to metal smelt and processing technology field.
Background technology
Valve is very important part in gas pipeline, be also in gas pipeline the higher product of technology content it One.At present the valve both at home and abroad in gas pipeline is typically divided to two big class from material, and a class is PE ball valves, and a class is metal ball Valve, both respectively have significant pluses and minuses, although wherein PE ball valves have many advantages, due to the limitation of its material character, deposit In many shortcomings, such as product rigidity is not enough, in geology sedimentation, or in process of expansion and contraction, is easily caused open and close torque and sealing Performance less stable；The core of plastic material is purged not thoroughly in pipeline, in the case of having the debris residual packing such as sandy soil, core It is easily damaged, cause sealing property to decline；In the state of long-time standing or long period closing are pressurized, operation moment of torsion is easily bright It is aobvious to rise, the damage of the accessories such as operation cap is easily caused, affect Long-Term Properties.Metal ball-valve equally has the advantages that uniqueness, But using unsatisfactory in PE gas pipelines, such as antiseptic property is undesirable, if rationally not processed, service life compared with It is short, it is impossible to match with the PE pipelines service life of 50 years.
The content of the invention
The technical problem to be solved is, for the shortcoming of above prior art, proposes that a kind of burnt gas valve is used High-strength anti-corrosion steel and its Technology for Heating Processing, can not only provide the sufficient intensity of valve, and make under long-term adverse circumstances The characteristics of with corrosion-resistant, wear-resistant and little coefficient of thermal expansion and contraction.
In order to solve above-mentioned technical problem, the technical scheme is that what is be accomplished by：A kind of combustion is provided Air valve high-strength anti-corrosion steel, the mass percent of its chemical composition is：C：0.02-0.04%, Cr:10.5-11.7%, Si： 0.15-0.19%, Mn：0.62-0.73%, Ni：0.45-0.52%, Re：0.15-0.17%, Nb：0.27-0.38%, Al:0.31- 0.33%, Y:0.11-0.13%, Ti：0.13-0.15%, Ca：0.75-0.77%, B：0.82-0.88%, Co：0.41-0.45%, Mo ：0.23-0.31%, S≤0.03%, P≤0.02%, rare earth metal：0.23-0.36%, balance of Fe；
The chemical composition mass percent of the rare earth metal is：Pm：13-18%, Lu：8-11%, Dy：3-6%, Gd：0.8- 2.4%, 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 For 3.6-3.8%, 1/4 thickness to center the second phase volume percentage is 5.7-6.1%；The stainless steel is at surface to 1/4 thickness Austenite average crystal grain diameter is 4.2-4.5 μm, and martensite average crystal grain diameter is 3.8-4.0 μm, and 1/4 thickness to center is difficult to understand Family name's body average crystal grain diameter is 5.2-5.5 μm, and martensite average crystal grain diameter is 7.1-7.5 μm.
The technical scheme that further limits of the invention is：Aforesaid burnt gas valve high-strength anti-corrosion steel, its chemical composition Mass percent be：C：0.02%, Cr:10.5%, Si：0.15%, Mn：0.62%, Ni：0.45%, Re：0.15%, Nb：0.27%, Al:0.31%, Y:0.11%, Ti：0.13%, Ca：0.75%, B：0.82%, Co：0.41%, Mo：0.23%, S≤0.03%, P≤ 0.02%, rare earth metal：0.23%, balance of Fe；
The chemical composition mass percent of the rare earth metal is：Pm：13%, Lu：8%, Dy：3%, Gd：0.8%, 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 For 3.6%, 1/4 thickness to center the second phase volume percentage is 5.7%；Stainless steel austenite at surface to 1/4 thickness is put down Crystal grain diameter is 4.2 μm, and martensite average crystal grain diameter is 3.8 μm, and 1/4 thickness is to center austenite average crystal grain diameter For 5.2 μm, martensite average crystal grain diameter is 7.1 μm.
Aforesaid burnt gas valve high-strength anti-corrosion steel, the mass percent of its chemical composition is：C：0.03%, Cr: 10.8%, Si：0.17%, Mn：0.68%, Ni：0.49%, Re：0.16%, Nb：0.32%, Al:0.32%, Y:0.12%, Ti：0.14%, Ca：0.76%, B：0.85%, Co：0.43%, Mo：0.27%, S≤0.03%, P≤0.02%, rare earth metal：0.29%, it is balance of Fe；
The chemical composition mass percent of the rare earth metal is：Pm：16%, Lu：10%, Dy：5%, Gd：1.5%, 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 For 3.7%, 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 Crystal grain diameter is 4.3 μm, and martensite average crystal grain diameter is 3.9 μm, and 1/4 thickness is to center austenite average crystal grain diameter For 5.4 μm, martensite average crystal grain diameter is 7.3 μm.
Aforesaid burnt gas valve high-strength anti-corrosion steel, the mass percent of its chemical composition is：C：0.04%, Cr: 11.7%, Si：0.19%, Mn：0.73%, Ni：0.52%, Re：0.17%, Nb：0.38%, Al:0.33%, Y:0.13%, Ti： 0.15%, Ca：0.77%, B：0.88%, Co：0.45%, Mo：0.31%, S≤0.03%, P≤0.02%, rare earth metal：0.36%, it is remaining Measure as Fe；
The chemical composition mass percent of the rare earth metal is：Pm：18%, Lu：11%, Dy：6%, Gd：2.4%, 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 For 3.8%, 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 Crystal grain diameter is 4.5 μm, and martensite average crystal grain diameter is 4.0 μm, and 1/4 thickness is to center austenite average crystal grain diameter For 5.5 μm, martensite average crystal grain diameter is 7.5 μm.
A kind of burnt gas valve 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 heating furnace and are heated to 980-990 DEG C, 1-3 hours are incubated, then using water-cooled, with 20-25 DEG C/speed of s is cooled to room temperature, then with the speed of 5-8 DEG C/s is heated to 650-670 DEG C 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 into 545-565 DEG C, after tempering 30-40min, Insulation 2-3min, makes steel equalizing temperature, and the mode that water-cooled is adopted afterwards is cooled to 380- with the cooldown rate of 23-25 DEG C/s 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, 1-3 hours are tempered, are then air cooled to room temperature.
Aforesaid burnt gas valve 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, then room is 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 heating furnace and are heated to 980 DEG C, 1 hour is incubated, then using water-cooled, with the speed of 20 DEG C/s Room temperature is cooled to, then with the speed of 5 DEG C/s 650 DEG C is heated to 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 into 545 DEG C, after tempering 30min, insulation 2min, makes steel equalizing temperature, after adopting 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.
Aforesaid burnt gas valve 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, then room is 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 heating furnace and are heated to 980 DEG C, 2 hours are incubated, then using water-cooled, with the speed of 22 DEG C/s Room temperature is cooled to, then with the speed of 7 DEG C/s 660 DEG C is heated to 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 into 550 DEG C, after tempering 35min, insulation 3min, makes steel equalizing temperature, after adopting 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, aforesaid burnt gas valve 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, then room is 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 heating furnace and are heated to 990 DEG C, 3 hours are incubated, then using water-cooled, with the speed of 25 DEG C/s Room temperature is cooled to, then with the speed of 8 DEG C/s 670 DEG C is heated to 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 into 565 DEG C, after tempering 40min, insulation 3min, makes steel equalizing temperature, after adopting 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 invention has the beneficial effects as follows：Alloying element Co, Mo, Cr, Ti in the present invention can improve martenaging martempering drag, Dislocation substructure is suppressed to reply；Ni can improve the toughness of ferrite matrix and can make crystal grain refinement, can improve the plasticity of steel and tough Property, reduce cleavage incline Co improve Mo2C-shaped core driving force, promotes tiny, disperse compound containing Mo to separate out；Ni and Co make jointly With promotion Fe3C and Mo2C-shaped is into further enhancing post-curing effect；Mo suppresses temper brittleness.The conjunction of Ni-Co-Mo-Me Reason coordinates, and makes steel obtain good obdurability.
Corrosion resisting steel is in low pH and high Cl-Under the acid solution corrosive environment of content, with excellent resistance to spot corrosion, uniformly Corrosive nature, mother metal uniform corrosion rate is in 0.3 mm/a or so, weld-fusion line and mother metal crossover position corrosion step depth Below 10 μm.
Specific embodiment
Below the present invention is described in further detail：
Embodiment 1
A kind of aforesaid burnt gas valve high-strength anti-corrosion steel that the present embodiment is provided, the mass percent of its chemical composition is： C：0.02%, Cr:10.5%, Si：0.15%, Mn：0.62%, Ni：0.45%, Re：0.15%, Nb：0.27%, Al:0.31%, Y: 0.11%, Ti：0.13%, Ca：0.75%, B：0.82%, Co：0.41%, Mo：0.23%, S≤0.03%, P≤0.02%, rare earth metal： 0.23%, balance of Fe；
The chemical composition mass percent of the rare earth metal is：Pm：13%, Lu：8%, Dy：3%, Gd：0.8%, 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 For 3.6%, 1/4 thickness to center the second phase volume percentage is 5.7%；Stainless steel austenite at surface to 1/4 thickness is put down Crystal grain diameter is 4.2 μm, and martensite average crystal grain diameter is 3.8 μm, and 1/4 thickness is to center austenite average crystal grain diameter For 5.2 μm, martensite average crystal grain diameter is 7.1 μm.
The burnt gas valve of the present embodiment 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, then room is 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 heating furnace and are heated to 980 DEG C, 1 hour is incubated, then using water-cooled, with the speed of 20 DEG C/s Room temperature is cooled to, then with the speed of 5 DEG C/s 650 DEG C is heated to 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 into 545 DEG C, after tempering 30min, insulation 2min, makes steel equalizing temperature, after adopting 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 burnt gas valve high-strength anti-corrosion steel that the present embodiment is provided, the mass percent of its chemical composition is：C： 0.03%, Cr:10.8%, Si：0.17%, Mn：0.68%, Ni：0.49%, Re：0.16%, Nb：0.32%, Al:0.32%, Y:0.12%, Ti：0.14%, Ca：0.76%, B：0.85%, Co：0.43%, Mo：0.27%, S≤0.03%, P≤0.02%, rare earth metal： 0.29%, balance of Fe；
The chemical composition mass percent of the rare earth metal is：Pm：16%, Lu：10%, Dy：5%, Gd：1.5%, 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 For 3.7%, 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 Crystal grain diameter is 4.3 μm, and martensite average crystal grain diameter is 3.9 μm, and 1/4 thickness is to center austenite average crystal grain diameter For 5.4 μm, martensite average crystal grain diameter is 7.3 μm.
The burnt gas valve 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, then room is 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 heating furnace and are heated to 980 DEG C, 2 hours are incubated, then using water-cooled, with the speed of 22 DEG C/s Room temperature is cooled to, then with the speed of 7 DEG C/s 660 DEG C is heated to 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 into 550 DEG C, after tempering 35min, insulation 3min, makes steel equalizing temperature, after adopting 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 burnt gas valve high-strength anti-corrosion steel that the present embodiment is provided, the mass percent of its chemical composition is：C： 0.04%, Cr:11.7%, Si：0.19%, Mn：0.73%, Ni：0.52%, Re：0.17%, Nb：0.38%, Al:0.33%, Y: 0.13%, Ti：0.15%, Ca：0.77%, B：0.88%, Co：0.45%, Mo：0.31%, S≤0.03%, P≤0.02%, rare earth gold Category：0.36%, balance of Fe；
The chemical composition mass percent of the rare earth metal is：Pm：18%, Lu：11%, Dy：6%, Gd：2.4%, 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 For 3.8%, 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 Crystal grain diameter is 4.5 μm, and martensite average crystal grain diameter is 4.0 μm, and 1/4 thickness is to center austenite average crystal grain diameter For 5.5 μm, martensite average crystal grain diameter is 7.5 μm.
The burnt gas valve 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, then room is 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 heating furnace and are heated to 990 DEG C, 3 hours are incubated, then using water-cooled, with the speed of 25 DEG C/s Room temperature is cooled to, then with the speed of 8 DEG C/s 670 DEG C is heated to 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 into 565 DEG C, after tempering 40min, insulation 3min, makes steel equalizing temperature, after adopting 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 technological thought only to illustrate the invention, it is impossible to which protection scope of the present invention is limited with this, it is every According to technological thought proposed by the present invention, any change done on the basis of technical scheme, the scope of the present invention is each fallen within Within.

Claims (8)

1. a kind of burnt gas valve high-strength anti-corrosion steel, it is characterised in that：The mass percent of its chemical composition is：C：0.02- 0.04%, Cr:10.5-11.7%, Si：0.15-0.19%, Mn：0.62-0.73%, Ni：0.45-0.52%, Re：0.15-0.17%, Nb：0.27-0.38%, Al:0.31-0.33%, Y:0.11-0.13%, Ti：0.13-0.15%, Ca：0.75-0.77%, B：0.82- 0.88%, Co：0.41-0.45%, Mo：0.23-0.31%, S≤0.03%, P≤0.02%, rare earth metal：0.23-0.36%, surplus For Fe；
The chemical composition mass percent of the rare earth metal is：Pm：13-18%, Lu：8-11%, Dy：3-6%, Gd：0.8- 2.4%, 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 For 3.6-3.8%, 1/4 thickness to center the second phase volume percentage is 5.7-6.1%；The stainless steel is at surface to 1/4 thickness Austenite average crystal grain diameter is 4.2-4.5 μm, and martensite average crystal grain diameter is 3.8-4.0 μm, and 1/4 thickness to center is difficult to understand Family name's body average crystal grain diameter is 5.2-5.5 μm, and martensite average crystal grain diameter is 7.1-7.5 μm.
2. burnt gas valve according to claim 1 high-strength anti-corrosion steel, it is characterised in that：The quality hundred of its chemical composition Point ratio is：C：0.02%, Cr:10.5%, Si：0.15%, Mn：0.62%, Ni：0.45%, Re：0.15%, Nb：0.27%, Al: 0.31%, Y:0.11%, Ti：0.13%, Ca：0.75%, B：0.82%, Co：0.41%, Mo：0.23%, S≤0.03%, P≤0.02%, Rare earth metal：0.23%, balance of Fe；
The chemical composition mass percent of the rare earth metal is：Pm：13%, Lu：8%, Dy：3%, Gd：0.8%, 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 For 3.6%, 1/4 thickness to center the second phase volume percentage is 5.7%；Stainless steel austenite at surface to 1/4 thickness is put down Crystal grain diameter is 4.2 μm, and martensite average crystal grain diameter is 3.8 μm, and 1/4 thickness is to center austenite average crystal grain diameter For 5.2 μm, martensite average crystal grain diameter is 7.1 μm.
3. burnt gas valve according to claim 1 high-strength anti-corrosion steel, it is characterised in that：The quality hundred of its chemical composition Point ratio is：C：0.03%, Cr:10.8%, Si：0.17%, Mn：0.68%, Ni：0.49%, Re：0.16%, Nb：0.32%, Al: 0.32%, Y:0.12%, Ti：0.14%, Ca：0.76%, B：0.85%, Co：0.43%, Mo：0.27%, S≤0.03%, P≤0.02%, Rare earth metal：0.29%, balance of Fe；
The chemical composition mass percent of the rare earth metal is：Pm：16%, Lu：10%, Dy：5%, Gd：1.5%, 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 For 3.7%, 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 Crystal grain diameter is 4.3 μm, and martensite average crystal grain diameter is 3.9 μm, and 1/4 thickness is to center austenite average crystal grain diameter For 5.4 μm, martensite average crystal grain diameter is 7.3 μm.
4. burnt gas valve according to claim 1 high-strength anti-corrosion steel, it is characterised in that：The quality hundred of its chemical composition Point ratio is：C：0.04%, Cr:11.7%, Si：0.19%, Mn：0.73%, Ni：0.52%, Re：0.17%, Nb：0.38%, Al: 0.33%, Y:0.13%, Ti：0.15%, Ca：0.77%, B：0.88%, Co：0.45%, Mo：0.31%, S≤0.03%, P≤ 0.02%, rare earth metal：0.36%, balance of Fe；
The chemical composition mass percent of the rare earth metal is：Pm：18%, Lu：11%, Dy：6%, Gd：2.4%, 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 For 3.8%, 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 Crystal grain diameter is 4.5 μm, and martensite average crystal grain diameter is 4.0 μm, and 1/4 thickness is to center austenite average crystal grain diameter For 5.5 μm, martensite average crystal grain diameter is 7.5 μm.
5. burnt gas valve according to claim 1 high-strength anti-corrosion Heat-Treatment of Steel technique, it is characterised in that include with Lower step：
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 heating furnace and are heated to 980-990 DEG C, 1-3 hours are incubated, then using water-cooled, with 20-25 DEG C/speed of s is cooled to room temperature, then with the speed of 5-8 DEG C/s is heated to 650-670 DEG C 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 into 545-565 DEG C, after tempering 30-40min, Insulation 2-3min, makes steel equalizing temperature, and the mode that water-cooled is adopted afterwards is cooled to 380- with the cooldown rate of 23-25 DEG C/s 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, 1-3 hours are tempered, are then air cooled to room temperature.
6. burnt gas valve according to claim 5 high-strength anti-corrosion Heat-Treatment of Steel technique, it is characterised in that include with Lower step：
Step 1：By heat steel to 580 DEG C, and 35min is incubated, then room is 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 heating furnace and are heated to 980 DEG C, 1 hour is incubated, then using water-cooled, with the speed of 20 DEG C/s Room temperature is cooled to, then with the speed of 5 DEG C/s 650 DEG C is heated to 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 into 545 DEG C, after tempering 30min, insulation 2min, makes steel equalizing temperature, after adopting 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. burnt gas valve according to claim 5 high-strength anti-corrosion Heat-Treatment of Steel technique, it is characterised in that include with Lower step：
Step 1：By heat steel to 595 DEG C, and 38min is incubated, then room is 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 heating furnace and are heated to 980 DEG C, 2 hours are incubated, then using water-cooled, with the speed of 22 DEG C/s Room temperature is cooled to, then with the speed of 7 DEG C/s 660 DEG C is heated to 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 into 550 DEG C, after tempering 35min, insulation 3min, makes steel equalizing temperature, after adopting 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. burnt gas valve according to claim 5 high-strength anti-corrosion Heat-Treatment of Steel technique, it is characterised in that include with Lower step：
Step 1：By heat steel to 610 DEG C, and 40min is incubated, then room is 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 heating furnace and are heated to 990 DEG C, 3 hours are incubated, then using water-cooled, with the speed of 25 DEG C/s Room temperature is cooled to, then with the speed of 8 DEG C/s 670 DEG C is heated to 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 into 565 DEG C, after tempering 40min, insulation 3min, makes steel equalizing temperature, after adopting 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.
CN201611147907.6A 2016-12-13 2016-12-13 High-strength anticorrosion steel for gas valve and heat treatment process of high-strength anticorrosion steel Pending CN106636959A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107745234A (en) * 2017-11-14 2018-03-02 郑媛媛 A kind of heat resistant and wear resistant valve element preparation technology
CN108315659A (en) * 2018-01-23 2018-07-24 合肥伊只门窗有限公司 A kind of corrosion-resistant stainless steel and its processing technology for metal door and window
CN109055870A (en) * 2018-08-24 2018-12-21 江苏华太电力仪表有限公司 A kind of split-body valve hatpin valve stainless steel material and preparation method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107745234A (en) * 2017-11-14 2018-03-02 郑媛媛 A kind of heat resistant and wear resistant valve element preparation technology
CN108315659A (en) * 2018-01-23 2018-07-24 合肥伊只门窗有限公司 A kind of corrosion-resistant stainless steel and its processing technology for metal door and window
CN109055870A (en) * 2018-08-24 2018-12-21 江苏华太电力仪表有限公司 A kind of split-body valve hatpin valve stainless steel material and preparation method thereof

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Application publication date: 20170510