CN108715977A - A kind of system cold-rolled automobile steel of Fe-Mn-Al-C and preparation method - Google Patents
A kind of system cold-rolled automobile steel of Fe-Mn-Al-C and preparation method Download PDFInfo
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- CN108715977A CN108715977A CN201810558226.1A CN201810558226A CN108715977A CN 108715977 A CN108715977 A CN 108715977A CN 201810558226 A CN201810558226 A CN 201810558226A CN 108715977 A CN108715977 A CN 108715977A
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
Abstract
A kind of system cold-rolled automobile steel of Fe-Mn-Al-C and preparation method, belong to material processing field；The chemical composition of the steel is by mass percentage：C：0.7~0.9%, Mn：10.0~14.0%, Al：7~9%, P < 0.005%, S < 0.002%, surplus are Fe and inevitable impurity；Preparation method：1)：It according to the composition proportion of the system cold-rolled automobile steels of Fe-Mn-Al-C, smelts, cast obtains ingot blank；2) it will be forged after ingot blank heating and thermal insulation；3) by hot rolling after ingot blank heating and thermal insulation, water cooling to room temperature obtains hot rolled plate；4) by cold rolling after hot rolled plate heating and thermal insulation, water cooling to room temperature obtains cold rolled sheet；5) it by cold rolled sheet heating and thermal insulation, is cooled to room temperature, the system cold-rolled automobile steels of Fe-Mn-Al-C is made；The tensile strength of steel of the present invention is 1014.9~1039.8MPa, and yield strength is 789.6~839.2MPa, and elongation percentage is 42~43%, and strength and ductility product is 42.6~44.7GPa%.
Description
Technical field
The invention belongs to material processing fields, and in particular to a kind of system cold-rolled automobile steel of Fe-Mn-Al-C and preparation side
Method.
Background technology
In recent years, constantly improve with national life level, car ownership maintains faster growth.By
In the end of the year 2016, national car ownership is up to 1.94 hundred million.The rapid development of automobile industry is that people's lives are brought greatly just
Profit, but a series of energy and environmental problem is also brought simultaneously.Energy-saving and emission-reduction are asked as the important of automobile industry urgent need to resolve
Topic.Data shows that automobile car weight often reduces by 1%, can save fuel consumption about 0.7%.Therefore, automotive light weight technology produces as automobile
The trend of industry development.
Currently, automobile lightweight mainly has following two approach：First, light material is used, as the aluminium of low-density closes
Gold, magnesium alloy, engineering plastics and carbon fibre composite etc. are applied to the components such as automobile engine more.But these light materials
Since intensity is relatively low, it is difficult to be applied to the critical component of automobile load-bearing and stress.Meanwhile higher production cost, it is complicated at
Type technique and poor welding performance also limit the extensive use of these materials.Second is that substituting traditional steel using high strength steel
Material achievees the purpose that loss of weight by reducing steel plate thickness specification.Statistics indicate that when steel plate thickness reduces 0.1mm, vehicle body can loss of weight
12%.Currently, traditional AHSS (Advanced High Strength Steel, advanced high-strength steel) such as DP steel, TRIP steel
It has been applied to automobile industry.
Another light-weighted thinking is to research and develop a kind of completely new low-density high-strength steel, avoid because band is thinned in thickness
The problem of insufficient rigidity come.The core of this thinking is that Al, Mn element of certain content are added into steel, relatively low to obtain
Density.Studies have shown that often the Al of addition 1%, steel density decline 0.101g/cm3, can loss of weight about 1.3%；Often add 1%
C, steel density decline 0.41g/cm3, loss of weight about 5.2%；Every 1% Mn can also obtain 0.1% weight loss effect.Pass through conjunction
The appropriate proportioning and moulding process of gold element and the control of heat treatment process can get higher comprehensive mechanical property.
At present focus mostly on the research of Fe-Mn-Al-C systems low density steel in the reality of higher Mn constituent contents (> 15wt.%)
Test steel.However experiment is found, it is many that higher Mn contents bring that melting difficulty is big, component segregation is serious, production cost is high etc.
It is difficult, it is difficult to be applied to large-scale industrial production.
Invention content
In view of the above technical problems, a kind of system cold-rolled automobile steels of Fe-Mn-Al-C of present invention offer and preparation method；It is logical
It crosses in steel and adds a certain amount of Al elements (7~9wt.%), while controlling Mn constituent contents (< 15wt.%), then by reasonable
Alloying component and moulding process are designed, the new automobile steel for having both low-density and high strength and ductility is made.
The system cold-rolled automobile steels of Fe-Mn-Al-C of the present invention, the chemical composition of the steel are by mass percentage：C：0.7
~0.9%, Mn：10.0~14.0%, Al：7~9%, P < 0.005%, S < 0.002%, surplus are Fe and inevitable miscellaneous
Matter.
The preparation method of the system cold-rolled automobile steels of Fe-Mn-Al-C of the present invention, comprises the steps of：
Step 1, melting：
It according to the composition proportion of the system cold-rolled automobile steels of Fe-Mn-Al-C, smelts, cast obtains ingot blank；
Step 2, it forges：
(1) ingot blank is heated to 1150~1250 DEG C, keeps the temperature 1~3h；
(2) ingot blank after heat preservation is forged, is air-cooled to room temperature, the ingot blank after forging is made；
Step 3, hot rolling：
(1) by ingot blank at 1150~1220 DEG C, 1.5~2.5h is kept the temperature；
(2) the ingot blank heating after heat preservation is rolled, total deformation is 80~90%, and hot rolling is made to room temperature in water cooling after hot rolling
Plank；
Step 4, cold rolling：
(1) by hot rolled plate at 950~1050 DEG C, 0.5~2h is kept the temperature；
(2) by the plank cold rolling after heat preservation, total deformation is 75~85%, and cold-reduced sheet is made to room temperature in water cooling after cold rolling
Material；
Step 5：
By cold rolled sheet, at 780~820 DEG C, 10~20min is kept the temperature, is then cooled to room temperature, Fe-Mn-Al-C systems are made
Cold rolled automobile steel.
The preparation method of the system cold-rolled automobile steels of above-mentioned Fe-Mn-Al-C, wherein：
In the step 1, melting uses vacuum induction melting furnace.
In the step 1, ingot blank is billet；Ingot blank cut in the step 2, after forging to obtain square billet.
In the step 3,5~8 passes are carried out altogether, and the hot rolled plate that thickness is 4~6mm is made.
In the step 4,5~8 passes are carried out altogether, and the system cold-rolled vapour of Fe-Mn-Al-C that thickness is 0.5~2mm is made
Automobile-used steel.
In the step 5, air-cooled or quenching may be used in the type of cooling.
The system cold-rolled automobile steels of Fe-Mn-Al-C of the present invention, tensile strength are 1014.9~1039.8MPa, and surrender is strong
Degree is 789.6~839.2MPa, and elongation percentage is 42~43%, and strength and ductility product is 42.6~44.7GPa%.
The system cold-rolled automobile steels of Fe-Mn-Al-C of the present invention, are organized as austenite+ferrite+κ carbide complex phase groups
It knits；Wherein austenite+ferrite volume fraction is about 90%.Provide higher plasticity.The intergranular κ carbide of Dispersed precipitate is logical
Obstruction austenite and ferritic deformation are crossed, yield strength and tensile strength are significantly improved.The present invention has both high intensity, high-plastic
The characteristics of property and low-density, it is a kind of ideal new automobile steel, has broad application prospects.
The system cold-rolled automobile steels of Fe-Mn-Al-C and preparation method of the present invention, compared with prior art, the present invention has
Following advantages：
(1) compared with orthodox car steel, the present invention reduces steel plate by adding the lower Al elements of atomic number
Density.It is matched simultaneously by rational element and processing technology so that steel plate has both the advantages of high intensity and high-ductility.
(2) chemical element type contained by the present invention is less, low with high manganese close without higher elements of costs such as rare earth elements
Degree steel is compared, and Mn constituent contents are further reduced, and to reduce industrial technology requirement, can save production cost.
(3) present invention obtains the complex phase group of austenite+ferrite+intergranular κ carbide by suitable heat treatment process
It knits.The formation of the tiny κ carbide of Dispersed precipitate significantly improves the intensity of experiment steel, overcomes traditional austenite or austenite
The relatively low disadvantage of+ferrite low density steel intensity.Meanwhile austenite and ferrite by retaining higher volume fraction so that
Testing steel has excellent elongation percentage.
(4) heat treatment process of the present invention is simple, and the heating and thermal insulation time is shorter (15min), and energy consumption is small, production cost compared with
It is low.
Description of the drawings
The rolling of the system cold-rolled automobile steels of manganese Fe-Mn-Al-C and heat treatment process flow in the low-density of Fig. 1 embodiments 1
Figure；
The SEM organization charts of the system cold-rolled automobile steels of manganese Fe-Mn-Al-C in low-density prepared by Fig. 2 embodiments 1；
The SEM organization charts of the system cold-rolled automobile steels of manganese Fe-Mn-Al-C in low-density prepared by Fig. 3 embodiments 2.
Specific implementation mode
The heating furnace used in the embodiment of the present invention is 50kW electric heating box type stove.
The milling train used in the embodiment of the present invention is Northeastern University's rolling technique and tandem rolling automation National Key Laboratory
Designed, designedHot Rolling Mill, maximum rolling force 4000kN, 0~1.5m/s of mill speed, main motor
Power 400kW.
The invention will be further described With reference to embodiment, and it is not intended to limit the protection scope of the present invention.
Embodiment 1
A kind of system cold-rolled automobile steels of Fe-Mn-Al-C, the chemical composition of the steel are by mass percentage：Mn is
12.87wt.%, Al 7.60wt.%, C 0.72wt.%, P < 0.005%, S < 0.002, remaining is for Fe and unavoidably
Impurity.
The preparation method of the system cold-rolled automobile steels of above-mentioned Fe-Mn-Al-C, comprises the steps of：
Step 1, melting：
It according to the composition proportion of the system cold-rolled automobile steels of Fe-Mn-Al-C, is smelted, is poured into a mould using vacuum induction melting furnace
To ingot blank；
Step 2, it forges：
(1) ingot blank is heated to 1200 DEG C, keeps the temperature 2h；
(2) ingot blank after heat preservation is forged, is air-cooled to room temperature, the ingot blank after forging is made, ingot blank is cut to obtain 35mm
× 120mm square billets；
Step 3, hot rolling：
(1) by square billet at 1200 DEG C, 2h is kept the temperature；
(2) the ingot blank heating after heat preservation is rolled, carries out 6 passes altogether, total deformation 85%, water cooling is to room after hot rolling
Temperature, it is 5mm hot rolled plates that thickness, which is made,；
Step 4, cold rolling：
(1) by hot rolled plate at 1000 DEG C, 1h is kept the temperature；
(2) by the plank cold rolling after heat preservation, according to mill capacity, 6 passes are carried out altogether, total deformation 80% is cold
Rear water cooling is rolled to room temperature, and cold rolled sheet is made；
Step 5：
By cold rolled sheet, at 800 DEG C, 15min is kept the temperature, room temperature is then air-cooled to, the Fe-Mn-Al-C that thickness is 1mm is made
System cold-rolled automobile steel.
The system cold-rolled automobile steels of Fe-Mn-Al-C manufactured in the present embodiment, tensile strength 1014.9MPa, yield strength
For 839.2MPa, elongation percentage 42%, strength and ductility product 42.6GPa%.
The rolling of the system cold-rolled automobile steels of manganese Fe-Mn-Al-C and heat treatment work in the low-density of the embodiment 1 of the present embodiment
Skill flow chart as shown in Figure 1, prepare low-density in the system cold-rolled automobile steels of manganese Fe-Mn-Al-C SEM organization charts such as Fig. 2 institutes
Show.
Embodiment 2
A kind of system cold-rolled automobile steels of Fe-Mn-Al-C, the chemical composition of the steel are by mass percentage：Mn is
12.87wt.%, Al 7.60wt.%, C 0.72wt.%, P < 0.005%, S < 0.002, remaining is for Fe and unavoidably
Impurity.
The preparation method of the system cold-rolled automobile steels of above-mentioned Fe-Mn-Al-C, comprises the steps of：
Step 1, melting：
It according to the composition proportion of the system cold-rolled automobile steels of Fe-Mn-Al-C, is smelted, is poured into a mould using vacuum induction melting furnace
To ingot blank；
Step 2, it forges：
(1) ingot blank is heated to 1200 DEG C, keeps the temperature 2h；
(2) ingot blank after heat preservation is forged, is air-cooled to room temperature, the ingot blank after forging is made, ingot blank is cut to obtain 35mm
× 120mm square billets；
Step 3, hot rolling：
(1) by square billet at 1200 DEG C, 2h is kept the temperature；
(2) the ingot blank heating after heat preservation is rolled, carries out 6 passes altogether, total deformation 85%, water cooling is to room after hot rolling
Thickness 5mm hot rolled plates are made in temperature；
Step 4, cold rolling：
(1) by hot rolled plate at 1000 DEG C, 1h is kept the temperature；
(2) the plank cold rolling after heat preservation is carried out by 6 passes according to mill capacity altogether, total deformation 80% is cold
Rear water cooling is rolled to room temperature, and cold rolled sheet is made；
Step 5：
By cold rolled sheet, at 800 DEG C, 15min is kept the temperature, room temperature is then quenched to, the Fe-Mn-Al-C that thickness is 1mm is made
System cold-rolled automobile steel.
The system cold-rolled automobile steels of Fe-Mn-Al-C manufactured in the present embodiment, tensile strength 1039.8MPa, yield strength
For 789.6MPa, elongation percentage 43%, strength and ductility product 44.7GPa.%.
The SEM organization charts of the system cold-rolled automobile steels of manganese Fe-Mn-A1-C are as shown in Figure 3 in low-density manufactured in the present embodiment.
Embodiment 3
A kind of system cold-rolled automobile steels of Fe-Mn-A1-C, the chemical composition of the steel are by mass percentage：C：0.8%,
Mn：10.0%, Al：7%, P < 0.005%, S < 0.002%, surplus are Fe and inevitable impurity.
The preparation method of the system cold-rolled automobile steels of above-mentioned Fe-Mn-Al-C, comprises the steps of：
Step 1, melting：
It according to the composition proportion of the system cold-rolled automobile steels of Fe-Mn-Al-C, is smelted, is poured into a mould using vacuum induction melting furnace
To ingot blank；
Step 2, it forges：
(1) ingot blank is heated to 1150 DEG C, keeps the temperature 3h；
(2) ingot blank after heat preservation is forged, is air-cooled to room temperature, the ingot blank after forging is made, ingot blank is cut to obtain 35mm
× 120mm square billets；
Step 3, hot rolling：
(1) by square billet at 1160 DEG C, 2.5h is kept the temperature；
(2) the ingot blank heating after heat preservation is rolled, carries out 5 passes altogether, total deformation 80%, water cooling is to room after hot rolling
Thickness 5mm hot rolled plates are made in temperature；
Step 4, cold rolling：
(1) by hot rolled plate at 950 DEG C, 2h is kept the temperature；
(2) the plank cold rolling after heat preservation is carried out by 8 passes according to mill capacity altogether, total deformation 85% is cold
Rear water cooling is rolled to room temperature, and cold rolled sheet is made；
Step 5：
By cold rolled sheet, at 780 DEG C, 20min is kept the temperature, room temperature is then quenched to, the Fe-Mn- that thickness is 1.5mm is made
The system cold-rolled automobile steels of Al-C.
The system cold-rolled automobile steels of Fe-Mn-Al-C manufactured in the present embodiment, tensile strength 1024.8MPa, yield strength
For 836.9MPa, elongation percentage 42.5%, strength and ductility product 43.1GPa%.
Embodiment 4
A kind of system cold-rolled automobile steels of Fe-Mn-Al-C, the chemical composition of the steel are by mass percentage：C：0.9%,
Mn：14.0%, Al：9%, P < 0.005%, S < 0.002%, surplus are Fe and inevitable impurity.
The preparation method of the system cold-rolled automobile steels of above-mentioned Fe-Mn-A1-C, comprises the steps of：
Step 1, melting：
It according to the composition proportion of the system cold-rolled automobile steels of Fe-Mn-A1-C, is smelted, is poured into a mould using vacuum induction melting furnace
To ingot blank；
Step 2, it forges：
(1) ingot blank is heated to 1250 DEG C, keeps the temperature 1h；
(2) ingot blank after heat preservation is forged, is air-cooled to room temperature, the ingot blank after forging is made, ingot blank is cut to obtain 35mm
× 120mm square billets；
Step 3, hot rolling：
(1) by square billet at 1220 DEG C, 1.5h is kept the temperature；
(2) the ingot blank heating after heat preservation is rolled, carries out 7 passes altogether, total deformation 82%, water cooling is to room after hot rolling
Temperature, it is 5mm hot rolled plates that thickness, which is made,；
Step 4, cold rolling：
(1) by hot rolled plate at 1050 DEG C, 0.5h is kept the temperature；
(2) by the plank cold rolling after heat preservation, according to mill capacity, 6 passes are carried out altogether, total deformation 75% is cold
Rear water cooling is rolled to room temperature, and cold rolled sheet is made；
Step 5：
By cold rolled sheet, at 820 DEG C, 10mm is kept the temperature, it is then air-cooled or be quenched to room temperature, the Fe- that thickness is 0.5mm is made
The system cold-rolled automobile steels of Mn-A1-C.
The system cold-rolled automobile steels of Fe-Mn-A1-C manufactured in the present embodiment, tensile strength 1038.3MPa, yield strength
For 831.6MPa, elongation percentage 43%, strength and ductility product 44.6GPa%.
Claims (6)
1. a kind of system cold-rolled automobile steels of Fe-Mn-Al-C, which is characterized in that the chemical composition of the steel is by mass percentage：
C：0.7~0.9%, Mn：10.0~14.0%, Al：7~9%, P < 0.005%, S < 0.002%, surplus are Fe and can not keep away
Exempt from impurity.
2. the preparation method of the system cold-rolled automobile steels of Fe-Mn-Al-C described in claim 1, which is characterized in that include following step
Suddenly：
Step 1, melting：
It according to the composition proportion of the system cold-rolled automobile steels of Fe-Mn-Al-C, smelts, cast obtains ingot blank；
Step 2, it forges：
(1) ingot blank is heated to 1150~1250 DEG C, keeps the temperature 1~3h；
(2) ingot blank after heat preservation is forged, is air-cooled to room temperature, the ingot blank after forging is made；
Step 3, hot rolling：
(1) by ingot blank at 1150~1220 DEG C, 1.5~2.5h is kept the temperature；
(2) by the ingot blank hot rolling after heat preservation, total deformation is 80~90%, and hot rolled plate is made to room temperature in water cooling after hot rolling；
Step 4, cold rolling：
(1) by hot rolled plate at 950~1050 DEG C, 0.5~2h is kept the temperature；
(2) by the plank cold rolling after heat preservation, total deformation is 75~85%, and cold rolled sheet is made to room temperature in water cooling after cold rolling；
Step 5：
By cold rolled sheet, at 780~820 DEG C, 10~20min is kept the temperature, is then cooled to room temperature, it is system cold-rolled that Fe-Mn-Al-C is made
Automobile steel.
3. the preparation method of the system cold-rolled automobile steels of Fe-Mn-Al-C according to claim 2, which is characterized in that the step
In rapid 3,5~8 passes are carried out altogether, and the hot rolled plate that thickness is 4~6mm is made.
4. the preparation method of the system cold-rolled automobile steels of Fe-Mn-Al-C according to claim 2, which is characterized in that the step
In rapid 4,5~8 passes are carried out altogether, and the system cold-rolled automobile steels of Fe-Mn-Al-C that thickness is 0.5~2mm are made.
5. the preparation method of the system cold-rolled automobile steels of Fe-Mn-Al-C according to claim 2, which is characterized in that described
The system cold-rolled automobile steels of Fe-Mn-Al-C, tensile strength be 1014.9~1039.8MPa, yield strength be 789.6~
839.2MPa, elongation percentage are 42~43%, and strength and ductility product is 42.6~44.7GPa%.
6. the preparation method of the system cold-rolled automobile steels of Fe-Mn-Al-C according to claim 2, which is characterized in that described
The system cold-rolled automobile steels of Fe-Mn-Al-C are organized as austenite+ferrite+κ carbide heterogeneous structures；Wherein austenite+iron
Ferritic volume fraction is about 90%.
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| CN109694997A (en) * | 2019-02-25 | 2019-04-30 | 上海大学 | Change the heat treatment process for promoting Fe-Mn-Al-C Mechanical Properties of Dual Phase Steels using γ → α ppolymorphism |
| CN109735691A (en) * | 2019-03-20 | 2019-05-10 | 湖南科技大学 | A kind of high manganese low density steel of 1000MPa high-carbon and preparation method thereof |
| CN112877606A (en) * | 2021-01-12 | 2021-06-01 | 钢铁研究总院 | Ultrahigh-strength full-austenite low-density steel and preparation method thereof |
| CN113549844A (en) * | 2021-06-30 | 2021-10-26 | 华北理工大学 | Method for improving hydrogen-induced delayed fracture resistance of Fe-Mn-Al-C light steel |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109694997A (en) * | 2019-02-25 | 2019-04-30 | 上海大学 | Change the heat treatment process for promoting Fe-Mn-Al-C Mechanical Properties of Dual Phase Steels using γ → α ppolymorphism |
| CN109694997B (en) * | 2019-02-25 | 2021-08-06 | 上海大学 | Heat treatment process for improving mechanical property of Fe-Mn-Al-C dual-phase steel by utilizing gamma → alpha isomerous transformation |
| CN109735691A (en) * | 2019-03-20 | 2019-05-10 | 湖南科技大学 | A kind of high manganese low density steel of 1000MPa high-carbon and preparation method thereof |
| CN112877606A (en) * | 2021-01-12 | 2021-06-01 | 钢铁研究总院 | Ultrahigh-strength full-austenite low-density steel and preparation method thereof |
| CN113549844A (en) * | 2021-06-30 | 2021-10-26 | 华北理工大学 | Method for improving hydrogen-induced delayed fracture resistance of Fe-Mn-Al-C light steel |
| CN113549844B (en) * | 2021-06-30 | 2022-06-07 | 华北理工大学 | Method for improving hydrogen-induced delayed fracture resistance of Fe-Mn-Al-C light steel |
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