CN107937813A - A kind of CrNiWCo two-phase alloys steel and preparation method thereof - Google Patents
A kind of CrNiWCo two-phase alloys steel and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- 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
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- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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- 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
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- 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
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- 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
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- C21D2211/001—Austenite
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- C—CHEMISTRY; METALLURGY
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- 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
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Abstract
A kind of CrNiWCo two-phase alloys steel and preparation method thereof, it is related to a kind of two-phase alloys steel and preparation method thereof.Yield strength and tensile strength the invention aims to solve the problems, such as existing two phase stainless steel is still relatively low.CrNiWCo two-phase alloys steel is prepared by C, Cr, Ni, Mn, Mo, W, Co, Sc, Al, V, S, P and surplus for Fe.Preparation method：First, electric arc furnaces → LF stoves → VOD stoves are passed through in melting successively；2nd, high temperature is tapped, natural cooling, is tempered through too fast forging and rolling, then High temperature diffusion, and natural cooling processing, that is, obtain CrNiWCo two-phase alloys steel.Advantage：Room temperature yield reaches by force more than 900MPa, and tensile strength reaches more than 1100MPa, and at 800 DEG C of temperature, surrender reaches more than 250MPa by force, and tensile strength reaches more than 250MPa.Present invention is mainly used for prepare CrNiWCo two-phase alloys steel.
Description
Technical field
The present invention relates to a kind of two-phase alloys steel and preparation method thereof.
Background technology
Two phase stainless steel since the U.S. is born, has had evolved to the third generation from the 1940s.Two phase stainless steel by
In with austenite+ferrite dual phase tissue, and the content of two phase constitutions is substantially suitable, therefore has austenitic stainless steel and iron concurrently
The characteristics of ferritic stainless steel.Yield strength is 2 times of common austenitic stainless steel up to 400MPa~550MPa.With ferrite
Stainless steel is compared, and the toughness of two phase stainless steel is high, and brittle transition temperature is low, and intergranular corrosion resistance performance and welding performance significantly carry
It is high；Remain the Some features of ferritic stainless steel again at the same time, such as 475 DEG C of brittleness, thermal conductivity are high, linear expansion coefficient is small, have
Superplasticity and magnetism etc..Compared with austenitic stainless steel, the intensity of two phase stainless steel is high, and particularly yield strength significantly improves,
And the performance such as resistance to pitting, anticorrosion stress-resistant, resistance to corrosion fatigue is obviously improved.Two phase stainless steel is by its chemical composition point
Class, can be divided into Cr18 types, Cr23 (being free of Mo) four class of type, Cr22 types and Cr25 types.But the surrender of existing two phase stainless steel
The problem of intensity and still relatively low tensile strength.
The content of the invention
Yield strength and tensile strength the invention aims to solve the problems, such as existing two phase stainless steel is still relatively low,
And provide a kind of CrNiWCo two-phase alloys steel and preparation method thereof.
A kind of CrNiWCo two-phase alloys steel is by mass fraction by 0.03%~0.08%C, 8%~11%Cr, 4%~7%
Ni, 0.3%~0.5%Mn, 0.6%~1%Mo, 1%~3%W, 0.3%~0.5%Co, 0.5%~2%Sc, 0.1%~
2%Al, 0.2%~1%V, 0.007%S, 0.02%P and surplus are prepared for Fe.
A kind of preparation method of CrNiWCo two-phase alloys steel, is specifically realized by the following steps：
First, melting：Prepare melting raw material according to actual needs, melting raw material will be prepared and be sequentially loaded into electric arc furnaces, melting is extremely
Melting raw material is completely melt, is then transferred in LF stoves, melting 10min~15min at being 1500 DEG C~1550 DEG C in temperature, then
It is transferred in VOD stoves, melting 10min~15min at being 1600 DEG C~1650 DEG C in temperature, obtains melt；
2nd, it is molded：The melt for obtaining step 1 at being 1500 DEG C in temperature is sent into mould, and steel is obtained after natural cooling
Ingot, steel ingot through too fast forging and rolling, obtain rolled steel successively, and fast temperature of forging is 950 DEG C~1050 DEG C, rolling temperature 950
DEG C~1050 DEG C, natural cooling is handled after rolled steel carries out High temperature diffusion tempering at being 1050 DEG C in temperature, that is, is obtained
CrNiWCo two-phase alloys steel；C mass fractions are 0.03%~0.08%, Cr mass fractions in the CrNiWCo two-phase alloys steel
For 8%~11%, Ni mass fractions be 4%~7%, Mn mass fractions are 0.3%~0.5%, Mo mass fractions be 0.6%~
1%th, W mass fractions are 1%~3%, Co mass fractions are 0.3%~0.5%, Sc mass fractions are 0.5%~2%, Al matter
Amount fraction is 0.1%~2%, V mass fractions are 0.2%~1%, S mass fractions are 0.007%, P mass fractions are 0.02%
It is Fe with surplus.
Advantage of the present invention：CrNiWCo two-phase alloys steel prepared by the present invention has yield strength, tensile strength and high temperature resistant
Characteristic, surrender is strong at room temperature reaches more than 900MPa, and tensile strength reaches more than 1100MPa, room temperature impact work(reach 30J with
On, at 800 DEG C of temperature, surrender is strong to reach more than 250MPa, tensile strength reaches more than 250MPa, therefore prepared by the present invention
CrNiWCo two-phase alloys steel has high intensity, corrosion-resistant, high temperature resistant environment undershoot brush and micromagnetism energy at high temperature, so having
The extremely extensive market demand, covers many advanced manufacturing fields.
Brief description of the drawings
Fig. 1 is the SEM figures that embodiment 3 prepares CrNiWCo two-phase alloys steel.
Embodiment
Embodiment one：Present embodiment is a kind of CrNiWCo two-phase alloys steel, it is characterised in that CrNiWCo is double
Phase alloy steel by mass fraction by 0.03%~0.08%C, 8%~11%Cr, 4%~7%Ni, 0.3%~0.5%Mn,
0.6%~1%Mo, 1%~3%W, 0.3%~0.5%Co, 0.5%~2%Sc, 0.1%~2%Al, 0.2%~1%V,
0.007%S, 0.02%P and surplus are prepared for Fe.
Cr is medium carbide former, and in all various carbide, chromium carbide is most tiny one kind, it can
It is evenly distributed in steel body product, so with high intensity, hardness, yield strength and wearability.Since it can make tissue thin
Change and be distributed, so plasticity, toughness, this is especially valuable to tool steel.The carbide of Cr is also compared with indissoluble solution, in short-term
Between heat under have hinder the crystal grain effect of growing up, long-time carburizing can also coarse-grain.So overheat sensitlzing effect can be reduced.Cr can make A
Body decomposition rate slows down, and reduces critical cooling rate during quenching, thus contributes to M bodies to form and improve the stability of M bodies, institute
There is excellent quenching degree with Cr steel, and quenching distortion is smaller.Pay attention to：Cr is ferrite former, reduces γ areas, so
In the presence of not having A body elements, high Cr steel will be in ferritic structure.Cr is combined with W or Mo, can increase retained austenite in hardened steel
Add, and help to obtain the Carbide Phases for needing degree of grinding.Cr can greatly improve the intensity and plasticity of structural steel, this influence
It is especially notable in the steel that Cr is combined with Ni.And Ni is added in Cr, the corrosion resistance of steel can also be greatly improved.Cr improves resistance to
The effect of erosion ability increases with phosphorus content and can decrease, because Cr does not work after being combined with C.
Present embodiment is industrially rarely employed at present using the simple nickel steel of the beneficial effects of Ni in the alloy.This
When being due to that nickel is used cooperatively with other alloying elements, effect is more preferable.The main function of nickel is that it changes the crystal of stainless steel
Structure.Increase nickel element in stainless steel and be remarkably improved the attributes such as the plasticity of stainless steel, weldability, toughness.Nickel makes Austria
Family name's body has face-centred cubic structure (FCC).Therefore nickel element is referred to as austenite former.Ordinary carbon steel crystal structure is known as
Ferrite, has body-centered cubic (BCC) structure, adds nickel and promotes crystal structure to be changed into the center of area from body-centered cubic (BCC) structure
Cube (FCC) structure, this structure are referred to as austenite.In addition, nickel can also expand stainless steel in non-oxidative medium
Passivation scope, effectively improve the passivation ability again of stainless steel.Nickel is excellent resistant material, is especially situated between to strong basicity
Matter.The intensity and plasticity of nickel are also fine, can bear various pressure processings.Austenite is formed except playing the role of, in stainless steel
Middle nickel can also expand passivation scope of the stainless steel in non-oxidative medium, effectively improve the passivation ability again of stainless steel.But nickel
The anti-corrosion requirement that make stainless steel reach some media environments as independent alloying element but has to reach suitable concentration (about
27%), so, nickel does not generally form stainless steel separately as unique alloying element.Usually and chromium exists at the same time and stainless steel
In, become an important branch chromiumnickel austenite stainless steel in stainless steel.It is demonstrated experimentally that containing nickel and stainless steel especially suitable for needing
The carburized parts of Surface hardening treatment are wanted, it can be obtained that hardness is high, superficial layer of good toughness resists abrasion and corrosion.Containing nickel steel
Easily there is banded structure and white-spot defects, need in process of production using necessary measure come pre- to above-mentioned bad progress
It is anti-.
Present embodiment adds the purpose of Co, due to characteristic possessed by Co, work that Co is played in present embodiment adds
With being；Thinning microstructure crystal grain increases the intensity and plasticity of alloy, improves the resistance to elevated temperatures of alloy and reduces quenching degree.So
Increase alloy rigidity with being formed in the fusion of Ni and maintaining plasticity needed for alloy.
Present embodiment adds the purpose of W, and W is high temperature resistant element and tungsten has anti abrasive characteristic at high operating temperatures,
Tungsten during present embodiment adds is evenly distributed in the dimple of metal with tiny compound form in the alloy.Thus conjunction can be played
Wear-resistant effect of the gold in hot environment.
Present embodiment adds the purpose of Mo, Mo and Cr it is compound among form stable carbide and improve anti-tempering energy
Power.
Present embodiment adds the purpose of V, and V changes with thinning microstructure crystal grain raising intensity in the merging of other elements in alloy
Kind toughness.
Present embodiment adds the purpose of Sc, and a small amount of Sc is added in present embodiment alloy to improve the intensity of alloy
Increase the hardness and heat resistance of alloy.
Present embodiment adds the purpose of Al, and Al can be increased with other alloying elements when merging with thinning microstructure crystal grain to be closed
Certain anti intercrystalline corrosion is played the role of in the intensity of gold, especially Al disperses in the crystal boundary of alloy.
Embodiment two：The difference of present embodiment and embodiment one is：The CrNiWCo two-phases are closed
Jin Gang by mass fraction by 0.03%C, 8%Cr, 4%Ni, 0.3%Mn, 0.6%Mo, 1%W, 0.3%Co, 0.5%Sc,
0.1%Al, 0.2%V, 0.007%S, 0.02%P and surplus are prepared for Fe.Other are identical with embodiment one.
Embodiment three：The difference of present embodiment and embodiment one is：The CrNiWCo two-phases are closed
Jin Gang is by mass fraction by 0.05%C, 9.5%Cr, 5.5%Ni, 0.4%Mn, 0.8%Mo, 2%W, 0.4%Co, 1.25%
Sc, 0.55%Al, 0.6%V, 0.007%S, 0.02%P and surplus are prepared for Fe.Other and one phase of embodiment
Together.
Embodiment four：The difference of present embodiment and embodiment one is：The CrNiWCo two-phases are closed
Jin Gang by mass fraction by 0.08%C, 11%Cr, 7%Ni, 0.5%Mn, 1%Mo, 3%W, 0.5%Co, 2%Sc, 2%Al,
1%V, 0.007%S, 0.02%P and surplus are prepared for Fe.Other are identical with embodiment one.
Embodiment five：Present embodiment is a kind of preparation method of CrNiWCo two-phase alloys steel, specifically press with
What lower step was completed：
First, melting：Prepare melting raw material according to actual needs, melting raw material will be prepared and be sequentially loaded into electric arc furnaces, melting is extremely
Melting raw material is completely melt, is then transferred in LF stoves, melting 10min~15min at being 1500 DEG C~1550 DEG C in temperature, then
It is transferred in VOD stoves, melting 10min~15min at being 1600 DEG C~1650 DEG C in temperature, obtains melt；
2nd, it is molded：The melt for obtaining step 1 at being 1500 DEG C in temperature is sent into mould, and steel is obtained after natural cooling
Ingot, steel ingot through too fast forging and rolling, obtain rolled steel successively, and fast temperature of forging is 950 DEG C~1050 DEG C, rolling temperature 950
DEG C~1050 DEG C, natural cooling is handled after rolled steel carries out High temperature diffusion tempering at being 1050 DEG C in temperature, that is, is obtained
CrNiWCo two-phase alloys steel；C mass fractions are 0.03%~0.08%, Cr mass fractions in the CrNiWCo two-phase alloys steel
For 8%~11%, Ni mass fractions be 4%~7%, Mn mass fractions are 0.3%~0.5%, Mo mass fractions be 0.6%~
1%th, W mass fractions are 1%~3%, Co mass fractions are 0.3%~0.5%, Sc mass fractions are 0.5%~2%, Al matter
Amount fraction is 0.1%~2%, V mass fractions are 0.2%~1%, S mass fractions are 0.007%, P mass fractions are 0.02%
It is Fe with surplus.
Embodiment six：The difference of present embodiment and embodiment five is：Described in step 2
The shape of CrNiWCo two-phase alloys steel is tabular, bar-shaped or tubulose.Other are identical with embodiment six.
Tabular, bar-shaped or tubulose the condition of delivery described in present embodiment should comply with national standard.
Using following verification experimental verifications effect of the present invention
Embodiment 1：A kind of preparation method of CrNiWCo two-phase alloys steel, is specifically realized by the following steps：
First, melting：Prepare melting raw material according to actual needs, melting raw material will be prepared and be sequentially loaded into electric arc furnaces, melting is extremely
Melting raw material is completely melt, is then transferred in LF stoves, and melting 10min at being 1500 DEG C in temperature, transfers in VOD stoves,
Melting 10min at being 1650 DEG C in temperature, obtains melt；
2nd, it is molded：The melt for obtaining step 1 at being 1500 DEG C in temperature is sent into mould, and steel is obtained after natural cooling
Ingot, steel ingot through too fast forging and rolling, obtain rolled steel successively, and fast temperature of forging is 1000 DEG C, and rolling temperature is 1000 DEG C, rolling
Natural cooling is handled after steel carry out High temperature diffusion tempering at being 1050 DEG C in temperature, that is, obtains CrNiWCo two-phase alloys steel；Institute
State that C mass fractions in CrNiWCo two-phase alloys steel are 0.03%, Cr mass fractions are 8%, Ni mass fractions are 4%, Mn mass
Fraction is 0.3%, Mo mass fractions are 0.6%, W mass fractions are 1%, Co mass fractions are 0.3%, Sc mass fractions are
0.5%th, Al mass fractions are 0.1%, V mass fractions are 0.2%, S mass fractions are 0.007%, P mass fractions are 0.02%
It is Fe with surplus.
The shape that the CrNiWCo two-phase alloys steel of the present embodiment is in is bar-shaped.
Two test specimens are prepared using a kind of preparation method of CrNiWCo two-phase alloys steel of embodiment 1 altogether, be Sample A and
Sample B, is detected Sample A and sample B, and testing result is as shown in table 1, understands that the present embodiment prepares CrNiWCo by table 1
Two-phase alloys steel room temperature average tensile strength is 1142MPa, and room temperature average yield strength is 944.5MPa, room temperature average elongation
For 13.3%, average room temperature ballistic work is 34J, and 800 DEG C of average tensile strengths are 270MPa, and 800 DEG C of average yield strengths are
259MPa, 800 DEG C of average elongations are 17.95%.
Table 1
1h is kept the temperature at being 760 DEG C in temperature to the Sample A that embodiment 1 obtains, then water quenching.10 points are selected in Sample A
Hardness is beaten, chooses HV50, hardness is respectively 378,364,361,369,368,360,383,357,357 and 361, and average value is
365.8.Rockwell hardness/HRC is scaled as 37.2.
1h is kept the temperature at being 760 DEG C in temperature to the sample B that embodiment 1 obtains, then water quenching.10 points are selected in sample B
Hardness is beaten, chooses HV50, hardness is respectively 350,356,370,367,369,373,371,388,378 and 371, and average value is
369.3.Rockwell hardness/HRC is scaled as 37.7.
Embodiment 2：A kind of preparation method of CrNiWCo two-phase alloys steel, is specifically realized by the following steps：
First, melting：Prepare melting raw material according to actual needs, melting raw material will be prepared and be sequentially loaded into electric arc furnaces, melting is extremely
Melting raw material is completely melt, is then transferred in LF stoves, and melting 15min at being 1550 DEG C in temperature, transfers in VOD stoves,
Melting 10min at being 1650 DEG C in temperature, obtains melt；
2nd, it is molded：The melt for obtaining step 1 at being 1500 DEG C in temperature is sent into mould, and steel is obtained after natural cooling
Ingot, steel ingot through too fast forging and rolling, obtain rolled steel successively, and fast temperature of forging is 1000 DEG C, and rolling temperature is 1000 DEG C, rolling
Natural cooling is handled after steel carry out High temperature diffusion tempering at being 1050 DEG C in temperature, that is, obtains CrNiWCo two-phase alloys steel；Institute
State that C mass fractions in CrNiWCo two-phase alloys steel are 0.05%, Cr mass fractions are 9.5%, Ni mass fractions are 5.5%, Mn
Mass fraction is 0.4%, Mo mass fractions are 0.8%, W mass fractions are 2%, Co mass fractions are 0.4%, Sc mass fractions
For 1.25%, Al mass fractions be 0.55%, V mass fractions are 0.6%, S mass fractions are 0.007%, P mass fractions are
0.02% and surplus be Fe.
The shape that the CrNiWCo two-phase alloys steel of the present embodiment is in is bar-shaped.
Two test specimens are prepared using a kind of preparation method of CrNiWCo two-phase alloys steel of embodiment 2 altogether, be sample C and
Sample D, is detected sample C and sample D, and testing result is as shown in table 2, understands that the present embodiment prepares CrNiWCo by table 2
Two-phase alloys steel room temperature average tensile strength is 1182.5MPa, and room temperature average yield strength is 987.5MPa, and room temperature averagely extends
Rate is 13.6%, and average room temperature ballistic work is 33.7J, and 800 DEG C of average tensile strengths are 293.5MPa, and 800 DEG C of average yields are strong
It is 17.4% to spend for 275MPa, 800 DEG C of average elongations.
Table 2
The sample C and sample D obtained to embodiment 2 keeps the temperature 1h at being 760 DEG C in temperature, and then water quenching, is detected in sample C
With the ballistic work of sample D, room temperature impact work(is respectively 32.5J and 32.9J.
The sample C and sample D obtained to embodiment 2 keeps the temperature 1h at being 962 DEG C in temperature, and then water quenching, selects in sample C
5 points beat hardness, choose HV50, hardness is respectively 351,355,355,356 and 362, average value 355.8.It is scaled Rockwell
Hardness/HRC is 36.1.
Embodiment 3：A kind of preparation method of CrNiWCo two-phase alloys steel, is specifically realized by the following steps：
First, melting：Prepare melting raw material according to actual needs, melting raw material will be prepared and be sequentially loaded into electric arc furnaces, melting is extremely
Melting raw material is completely melt, is then transferred in LF stoves, and melting 15min at being 1550 DEG C in temperature, transfers in VOD stoves,
Melting 15min at being 1600 DEG C in temperature, obtains melt；
2nd, it is molded：The melt for obtaining step 1 at being 1500 DEG C in temperature is sent into mould, and steel is obtained after natural cooling
Ingot, steel ingot through too fast forging and rolling, obtain rolled steel successively, and fast temperature of forging is 1000 DEG C, and rolling temperature is 1000 DEG C, rolling
Natural cooling is handled after steel carry out High temperature diffusion tempering at being 1050 DEG C in temperature, that is, obtains CrNiWCo two-phase alloys steel；Institute
State that C mass fractions in CrNiWCo two-phase alloys steel are 0.08%, Cr mass fractions are 11%, Ni mass fractions are 7%, Mn matter
Amount fraction is 0.5%, Mo mass fractions are 1%, W mass fractions are 3%, Co mass fractions are 0.5%, Sc mass fractions are
2%th, Al mass fractions are 2%, V mass fractions are 1%, S mass fractions are 0.007%, P mass fractions are 0.02% and surplus
For Fe.
CrNiWCo two-phase alloys steel SEM figures manufactured in the present embodiment prepare CrNiWCo as shown in Figure 1, Fig. 1 is embodiment 3
The SEM figures of two-phase alloys steel.
Claims (6)
- A kind of 1. CrNiWCo two-phase alloys steel, it is characterised in that CrNiWCo two-phase alloys steel by mass fraction by 0.03%~ 0.08%C, 8%~11%Cr, 4%~7%Ni, 0.3%~0.5%Mn, 0.6%~1%Mo, 1%~3%W, 0.3%~ 0.5%Co, 0.5%~2%Sc, 0.1%~2%Al, 0.2%~1%V, 0.007%S, 0.02%P and surplus are prepared for Fe Form.
- A kind of 2. CrNiWCo two-phase alloys steel according to claim 1, it is characterised in that the CrNiWCo two-phase alloys Steel is by mass fraction by 0.03%C, 8%Cr, 4%Ni, 0.3%Mn, 0.6%Mo, 1%W, 0.3%Co, 0.5%Sc, 0.1% Al, 0.2%V, 0.007%S, 0.02%P and surplus are prepared for Fe.
- A kind of 3. CrNiWCo two-phase alloys steel according to claim 1, it is characterised in that the CrNiWCo two-phase alloys Steel by mass fraction by 0.05%C, 9.5%Cr, 5.5%Ni, 0.4%Mn, 0.8%Mo, 2%W, 0.4%Co, 1.25%Sc, 0.55%Al, 0.6%V, 0.007%S, 0.02%P and surplus are prepared for Fe.
- A kind of 4. CrNiWCo two-phase alloys steel according to claim 1, it is characterised in that the CrNiWCo two-phase alloys Steel is by mass fraction by 0.08%C, 11%Cr, 7%Ni, 0.5%Mn, 1%Mo, 3%W, 0.5%Co, 2%Sc, 2%Al, 1% V, 0.007%S, 0.02%P and surplus are prepared for Fe.
- A kind of a kind of 5. preparation method of CrNiWCo two-phase alloys steel, it is characterised in that preparation side of CrNiWCo two-phase alloys steel Method is completed according to the following steps：First, melting：Prepare melting raw material according to actual needs, melting raw material will be prepared and be sequentially loaded into electric arc furnaces, melting to melting Raw material is completely melt, is then transferred in LF stoves, and melting 10min~15min at being 1500 DEG C~1550 DEG C in temperature, retransfers Into VOD stoves, melting 10min~15min at being 1600 DEG C~1650 DEG C in temperature, obtains melt；2nd, it is molded：The melt for obtaining step 1 at being 1500 DEG C in temperature is sent into mould, and steel ingot is obtained after natural cooling, Steel ingot through too fast forging and rolling, obtains rolled steel successively, and fast temperature of forging is 950 DEG C~1050 DEG C, rolling temperature for 950 DEG C~ 1050 DEG C, natural cooling is handled after rolled steel carries out High temperature diffusion tempering at being 1050 DEG C in temperature, that is, it is double to obtain CrNiWCo Phase alloy steel；In the CrNiWCo two-phase alloys steel C mass fractions be 0.03%~0.08%, Cr mass fractions be 8%~ 11%th, Ni mass fractions are 4%~7%, Mn mass fractions are 0.3%~0.5%, Mo mass fractions are 0.6%~1%, W matter Amount fraction is 1%~3%, Co mass fractions are 0.3%~0.5%, Sc mass fractions are 0.5%~2%, Al mass fractions are 0.1%~2%, V mass fractions are 0.2%~1%, S mass fractions are 0.007%, P mass fractions are 0.02% and surplus is Fe。
- A kind of 6. preparation method of CrNiWCo two-phase alloys steel according to claim 1, it is characterised in that institute in step 2 The shape for the CrNiWCo two-phase alloys steel stated is tabular, bar-shaped or tubulose.
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