CN108486499A - A kind of shield machine cutter steel and its manufacturing method - Google Patents
A kind of shield machine cutter steel and its manufacturing method Download PDFInfo
- Publication number
- CN108486499A CN108486499A CN201810118867.5A CN201810118867A CN108486499A CN 108486499 A CN108486499 A CN 108486499A CN 201810118867 A CN201810118867 A CN 201810118867A CN 108486499 A CN108486499 A CN 108486499A
- Authority
- CN
- China
- Prior art keywords
- steel
- temperature
- shield machine
- hours
- machine cutter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- 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
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/22—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for drills; for milling cutters; for machine cutting tools
-
- 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
- C22C38/02—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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
Landscapes
- Chemical & Material Sciences (AREA)
- 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)
- Forging (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
A kind of shield machine cutter steel, the ingredient and mass percent of shield machine cutter steel are：C：0.70%~0.75%, Si：0.15%~0.25%, Mn：0.45%~0.55%, Cr：5.00%~5.20%, Mo：2.30%~2.40%, V：0.50%~0.60%, P<0.020%, S<0.005%, surplus is Fe and inevitable impurity.The present invention is refined uniformly by induction furnace melting, electroslag furnace remelting, three-dimensional and FM methods are forged and heat treatment after forging is fabricated.Not only wearability is good, hardness is high, good toughness by the design, but also makes the thorough fragmentation of large-size carbon compound in steel ingot using the forging of FM methods, and tensile stress inside forging is avoided to exist.
Description
Technical field
The present invention relates to a kind of shield machine cutter steel more particularly to a kind of shield machine cutter steel and its manufacturing method,
It is particularly applicable to improve the toughness of shield machine steel, rigidity and wearability.
Background technology
Shield machine (shielding tunnel excavator) is widely used in subway, highway and railway traffic, energy delivery, underpass
Etc. Important Projects, have many advantages, such as that excavation speed is fast, safe and environment-friendly, economical.Shield machine cutter is the tooth of shield machine, is shield
Structure machine realizes the critical piece of tunneling function.Since cutter should be wear-resisting in driving, avoided when by enormous impact again
It bursts apart or is plastically deformed, so cutter material should have high rigidity, high intensity and good impact flexibility.Shield machine in the market
Cutter material mainly has external U.S. Robbins, a Germany Wirth steel alloys, the domestic HH201 for commonly using H13 and research and development,
HH301, SDH55 etc..In 0.3-0.6wt.%, alloying element type differs the C content of these steel alloys, content is different, passes through
Different pressure processing, heat treatment method, reach the Optimized Matching of hardness and toughness.
China Patent Publication No. is CN104831171A, and publication date is that the patent of invention on the 12nd of August in 2015 discloses one
Kind shield machine cutter steel alloy SDH55 and preparation method thereof, each mass percent that forms are：C：0.4~0.55%, Si：
0.10~0.40%, Mn：0.10~0.30%, Cr：5.10~6.50%, Mo：2.20~3.00%, V：0.45~0.85%,
Remaining is Fe and inevitable impurity element, S≤0.005% in impurity, P≤0.010%.The present invention through dispensing, smelt, pour
Great waves, electroslag remelting；Hot sending carries out high-temperature homogenization processing after demoulding；Then multiway forging, soft annealing and ultra fine, most
The shield machine cutter steel alloy SDH55 for having both high abrasion and high tenacity is prepared eventually.Although the shield machine knife that the invention can make
Tool steel alloy has higher stiffness, but is needed in face of the cutter of more and more high rigidity in shield machine market and high impact toughness
It asks, then needs to prepare the better shield machine cutter of comprehensive performance.
Invention content
The purpose of the present invention is overcoming the problems, such as that cutter steel comprehensive performance existing in the prior art is poor, one kind is provided
Comprehensive performance more preferably shield machine cutter steel and its manufacturing method.
In order to achieve the above object, technical solution of the invention is：
A kind of shield machine cutter steel, it is characterised in that：The ingredient and mass percent of shield machine cutter steel be：
C：0.70%~0.75%, Si：0.15%~0.25%, Mn：0.45%~0.55%, Cr：5.00%~
5.20%, Mo：2.30%~2.40%, V：0.50%~0.60%, P<0.020%, S<0.005%, surplus is Fe and can not
Avoid impurity.
A kind of manufacturing method of shield machine cutter steel, the manufacturing method include the following steps：
The first step：Induction furnace melting, by the mass percentage of each alloy raw material component element of shield machine cutter steel
Dispensing is carried out, alloy composition is made of following elements：C：0.70%~0.75%, Si：0.15%~0.25%, Mn：
0.45%~0.55%, Cr：5.00%~5.20%, Mo：2.30%~2.40%, V：0.50%~0.60%, surplus Fe
With inevitable impurity element, wherein impurity element P<0.020%, S<0.005%；After dispensing, alloy compositions raw material is put into
Melting is carried out in induction furnace, then pours into Φ (400~280) mm × (2100~2500) mm electrode bars；
Second step：Electroslag furnace remelting, the obtained electrode bar that will be prepared in the first step carry out remelting in electroslag furnace, system
At the steel ingot of Φ (520~360) mm × (1200~1350) mm, and above-mentioned steel ingot is made annealing treatment；
Third walks：Three-dimensional refinement is uniformly and the forging of FM methods, the steel ingot obtained after being made annealing treatment in second step carry out three-dimensional
Refinement is uniformly and FM methods are forged, and steps are as follows for forging：
A. Φ (520~360) mm × (1200~1350) the mm Heating Steel Ingots obtained after being made annealing treatment in second step are extremely
1240 DEG C and keep the temperature 10 hours after, the steel ingot after heating is forged into：Wide × high × long ≈ (422~344) mm × (550~
443) then above-mentioned rectangular bloom is put into 1200 DEG C of soaking pit and keeps the temperature 4 hours by mm × (1100~900) mm rectangular blooms；
B. length direction jumping-up：The rectangular bloom obtained in step a progress length direction is upset as：Wide × high × long ≈
(620~506) mm × (748~602) mm × (550~450) mm, length direction upset ratio=2.0, then by above-mentioned rectangular bloom
It is put into 1200 DEG C of soaking pit and keeps the temperature 4 hours；
C. short transverse jumping-up：The rectangular bloom obtained in step b progress short transverse is upset as：Wide × high × long ≈
(620~506) mm × (374~301) mm × (1100~900) mm, short transverse upset ratio=2.0, then by above-mentioned rectangle
The soaking pit that base is put into 1200 DEG C keeps the temperature 4 hours；
D. width direction jumping-up：The rectangular bloom obtained in step c progress width direction is upset as：Wide × high × long ≈
(310~253) mm × (748~602) mm × (1100~900) mm, width direction upset ratio=2.0, then by above-mentioned rectangle
The soaking pit that base is put into 1200 DEG C keeps the temperature 4 hours；
E. length direction jumping-up：The rectangular bloom obtained in step d progress length direction is upset as：Wide × high × long ≈
(620~506) mm × (748~602) mm × (550~450) mm, length direction upset ratio=2.0, then by above-mentioned rectangular bloom
It is put into 1200 DEG C of soaking pit and keeps the temperature 4 hours；
F. it pulls out：The rectangular bloom obtained in step e is drawn into using upper and lower tablet along short transverse：Wide × high × long ≈
Above-mentioned rectangular bloom, is then put into 1200 DEG C of soaking pit by (220~180) mm × (5260~4241) mm × (220~180) mm
Heat preservation 4 hours；
G. square billet pulls out circle：The rectangular bloom obtained in step f is drawn into round scale along short transverse：Φ (220~180)
The steel ingot of mm × (6697~5400) mm, then three-dimensional refinement at this time is uniformly and the forging of FM methods is completed；
4th step：Heat treatment after forging, the steel of the Φ obtained during third is walked (220~180) mm × (6697~5400) mm
Ingot obtains shield machine cutter round steel after carrying out cooling after forged, annealing and ultra fine successively, at this time shield machine cutter steel
Manufacture is completed.
The second step：Electroslag furnace remelting, the obtained electrode bar that will be prepared in the first step carry out weight in electroslag furnace
It is molten, the steel ingot of Φ (520~360) mm × (1200~1350) mm is made, in electroslag remelting process, it is 12~15mm/ to melt speed
Min, and above-mentioned steel ingot is made annealing treatment, heating temperature is 1200~1250 DEG C, and keeps the temperature 12~15 hours.
4th step：Heat treatment after forging, the Φ obtained during third is walked (220~180) mm × (6697~5400) mm
Round steel anneal 10-12 hours at 820-840 DEG C after furnace cooling, obtain cooling after forged round steel；Again by cooling after forged round steel
After being heated to 1050~1100 DEG C and keeping the temperature 5~8 hours, round steel is then put into pond rapid cooling, then nodularization is carried out to round steel and is moved back
Fire, annealing process are：10~12 hours are kept the temperature at first again 820~840 DEG C, is then furnace-cooled at 720~740 DEG C and keeps the temperature 15 again
~20 hours, then slow cooling finally obtains shield machine cutter round steel to room temperature, shield machine cutter is completed with steel making at this time.
Compared with prior art, beneficial effects of the present invention are：
1, a kind of shield machine cutter of the present invention is with C mass percents in steel：0.70%~0.75%, therefore the shield of the design
Structure rounding machine cutter steel belongs to high-carbon steel, and the design improves the hardness and wear-resisting property of steel by improving carbon content, passes through control
The content of Si does not reduce the toughness of steel while ensureing the hardness of steel；Ensureing steel by controlling the content of Mn, Cr simultaneously
Hardness while do not make grain coarsening, reduce segregation, reduce Cr23C6 and be precipitated；Finally by the content of control Mo, V, to protect
Card post-curing ensures the hardening of tissue and the thermal stability of steel, while effectively reducing cost of material.Therefore, the shield machine of the design
Cutter belongs to the toughness that high-carbon steel does not reduce steel while improving the hardness and wear-resisting property of steel with steel, effectively increases shield
The comprehensive performance of rounding machine cutter steel.
2, a kind of shield machine cutter of the present invention uses three-dimensional refinement uniformly during fabrication with steel and FM methods are forged, and makes in steel ingot
The thorough fragmentation of large-size carbon compound, so that the microscopic structure of high-carbon steel is significantly refined and is homogenized, avoiding drawing inside forging
Stress there are while the outline toughness of finished steel, intensity and fatigue life significantly.Therefore, the design is forged using FM methods,
Avoid inside forging tensile stress there are while the outline toughness of finished steel, intensity and fatigue life significantly.
Description of the drawings
Fig. 1 is the center portion micro-organization chart after the shield machine cutter of the embodiment of the present invention 1 is annealed with steel.
Specific implementation mode
Below in conjunction with description of the drawings, the present invention is described in further detail with specific implementation mode.
A kind of shield machine cutter steel, it is characterised in that：The ingredient and mass percent of shield machine cutter steel be：
C：0.70%~0.75%, Si：0.15%~0.25%, Mn：0.45%~0.55%, Cr：5.00%~
5.20%, Mo：2.30%~2.40%, V：0.50%~0.60%, P<0.020%, S<0.005%, surplus is Fe and can not
Avoid impurity.
A kind of manufacturing method of shield machine cutter steel, the manufacturing method include the following steps：
The first step：Induction furnace melting, by the mass percentage of each alloy raw material component element of shield machine cutter steel
Dispensing is carried out, alloy composition is made of following elements：C：0.70%~0.75%, Si：0.15%~0.25%, Mn：
0.45%~0.55%, Cr：5.00%~5.20%, Mo：2.30%~2.40%, V：0.50%~0.60%, surplus Fe
With inevitable impurity element, wherein impurity element P<0.020%, S<0.005%；After dispensing, alloy compositions raw material is put into
Melting is carried out in induction furnace, then pours into Φ (400~280) mm × (2100~2500) mm electrode bars；
Second step：Electroslag furnace remelting, the obtained electrode bar that will be prepared in the first step carry out remelting in electroslag furnace, system
At the steel ingot of Φ (520~360) mm × (1200~1350) mm, and above-mentioned steel ingot is made annealing treatment；
Third walks：Three-dimensional refinement is uniformly and the forging of FM methods, the steel ingot obtained after being made annealing treatment in second step carry out three-dimensional
Refinement is uniformly and FM methods are forged, and steps are as follows for forging：
A. Φ (520~360) mm × (1200~1350) the mm Heating Steel Ingots obtained after being made annealing treatment in second step are extremely
1240 DEG C and keep the temperature 10 hours after, the steel ingot after heating is forged into：Wide × high × long ≈ (422~344) mm × (550~
443) then above-mentioned rectangular bloom is put into 1200 DEG C of soaking pit and keeps the temperature 4 hours by mm × (1100~900) mm rectangular blooms；
B. length direction jumping-up：The rectangular bloom obtained in step a progress length direction is upset as：Wide × high × long ≈
(620~506) mm × (748~602) mm × (550~450) mm, length direction upset ratio=2.0, then by above-mentioned rectangular bloom
It is put into 1200 DEG C of soaking pit and keeps the temperature 4 hours；
C. short transverse jumping-up：The rectangular bloom obtained in step b progress short transverse is upset as：Wide × high × long ≈
(620~506) mm × (374~301) mm × (1100~900) mm, short transverse upset ratio=2.0, then by above-mentioned rectangle
The soaking pit that base is put into 1200 DEG C keeps the temperature 4 hours；
D. width direction jumping-up：The rectangular bloom obtained in step c progress width direction is upset as：Wide × high × long ≈
(310~253) mm × (748~602) mm × (1100~900) mm, width direction upset ratio=2.0, then by above-mentioned rectangle
The soaking pit that base is put into 1200 DEG C keeps the temperature 4 hours；
E. length direction jumping-up：The rectangular bloom obtained in step d progress length direction is upset as：Wide × high × long ≈
(620~506) mm × (748~602) mm × (550~450) mm, length direction upset ratio=2.0, then by above-mentioned rectangular bloom
It is put into 1200 DEG C of soaking pit and keeps the temperature 4 hours；
F. it pulls out：The rectangular bloom obtained in step e is drawn into using upper and lower tablet along short transverse：Wide × high × long ≈
Above-mentioned rectangular bloom, is then put into 1200 DEG C of soaking pit by (220~180) mm × (5260~4241) mm × (220~180) mm
Heat preservation 4 hours；
G. square billet pulls out circle：The rectangular bloom obtained in step f is drawn into round scale along short transverse：Φ (220~180)
The steel ingot of mm × (6697~5400) mm, then three-dimensional refinement at this time is uniformly and the forging of FM methods is completed；
4th step：Heat treatment after forging, the steel of the Φ obtained during third is walked (220~180) mm × (6697~5400) mm
Ingot obtains shield machine cutter round steel after carrying out cooling after forged, annealing and ultra fine successively, at this time shield machine cutter steel
Manufacture is completed.
The second step：Electroslag furnace remelting, the obtained electrode bar that will be prepared in the first step carry out weight in electroslag furnace
It is molten, the steel ingot of Φ (520~360) mm × (1200~1350) mm is made, in electroslag remelting process, it is 12~15mm/ to melt speed
Min, and above-mentioned steel ingot is made annealing treatment, heating temperature is 1200~1250 DEG C, and keeps the temperature 12~15 hours.
4th step：Heat treatment after forging, the Φ obtained during third is walked (220~180) mm × (6697~5400) mm
Round steel anneal 10-12 hours at 820-840 DEG C after furnace cooling, obtain cooling after forged round steel；Again by cooling after forged round steel
After being heated to 1050~1100 DEG C and keeping the temperature 5~8 hours, round steel is then put into pond rapid cooling, then nodularization is carried out to round steel and is moved back
Fire, annealing process are：10~12 hours are kept the temperature at first again 820~840 DEG C, is then furnace-cooled at 720~740 DEG C and keeps the temperature 15 again
~20 hours, then slow cooling finally obtains shield machine cutter round steel to room temperature, shield machine cutter is completed with steel making at this time.
The principle of the present invention is described as follows：
The present invention shield machine cutter steel chemical element selection with control the reason is as follows that：
C：0.70%~0.75%, increase the intensity that matrix can be improved in carbon content, improve the hardness and wearability of steel, is formed
Different alloy carbides, achieve the effect that strengthen matrix.But carbon content is excessively high, can reduce the toughness of cutter steel and resist tired
Labor performance, the design make the thorough fragmentation of large-size carbon compound in steel ingot using the forging of FM methods, keep the microscopic structure of high-carbon steel big
Amplitude refines and homogenization, avoid inside forging tensile stress there are while significantly the outline toughness of finished steel, intensity and
Fatigue life.
Si：0.15%~0.25%, silicon energy solution strengthening steel ingot, enhancing drawing hardening effect effectively can inhibit alloy to ooze
The precipitation of carbon body improves the spread of alloy carbide, so that it is guaranteed that the toughness of steel ingot does not reduce.
Mn：0.45%~0.55%, the intensity of matrix can be improved in manganese element, improves the hardness of steel, while can inhibit to close
The precipitation of golden cementite does not make grain coarsening, reduces segregation.
Cr：5.00%~5.20%, chromium and carbon form alloy carbide and strengthen matrix, and the design is according to the content of carbon
The content of chromium is controlled to the precipitation that can effectively inhibit Cr23C6 5.00%~5.20%, prevents from reducing while grain coarsening
Cost of material.
Mo：2.30%~2.40%, molybdenum and carbon form alloy carbide and strengthen matrix, and carbonization is precipitated in when post-curing
Object plays precipitation enhancement, enhances the elevated temperature strength and wearability of cutter steel.While the thermal stability for ensuring steel ingot, no
Keep cost excessively high.
V：0.50%~0.60%, vanadium is mainly worked in the form of carbonitride.The carbonitride of vanadium can refine crystalline substance
Grain, improves the obdurability of mould steel；When post-curing, the vanadium carbide nitride of a large amount of disperse educts can strengthen steel ingot matrix, improve
The elevated temperature strength and hardness of steel ingot, enhances the high high-temp stability of mould steel.
P<0.020%, S<0.005%, p and s are the major impurities of cutter steel of the present invention.Phosphorus content is more than
0.020%, steel ingot is also easy to produce crackle；Sulphur is more than 0.005% and sulfide easily occurs, reduces the wearability of cutter steel.Sulphur and phosphorus
Content should reduce as far as possible.
FM forging methods：Refer to the forging method of no Mannesmann effect, the deformation of FM methods is substantially to utilize upper flat anvil, lower platform
Asymmetrical deformation, lower platform is larger to the frictional resistance of forging, deformation gradually carry out from top to bottom, make tensile stress have been moved to become
Body increases forging center portion compression near lower platform contact surface.The presence of forging center portion axial tension stress is avoided, is improved
The mechanical performance of forging entirety.
Embodiment 1：
A kind of shield machine cutter steel, the ingredient and mass percent of shield machine cutter steel are：
C：0.72%, Si：0.18%, Mn：0.48%, Cr：5.18%, Mo：2.32%, V：0.50%, P<0.020%, S
<0.005%, surplus is Fe and inevitable impurity.
A kind of manufacturing method of shield machine cutter steel, the manufacturing method include the following steps：
The first step：Induction furnace melting, by the mass percentage of each alloy raw material component element of shield machine cutter steel
Dispensing is carried out, alloy composition is made of following elements：C：0.72%, Si：0.18%, Mn：0.48%, Cr：5.18%,
Mo：2.32%, V：0.50%, surplus is Fe and inevitable impurity element, wherein impurity element P<0.020%, S<
0.005%；After dispensing, alloy compositions raw material is put into induction furnace and carries out melting, then pours into Φ 360mm × 2200mm electricity
Pole stick；
The second step：Electroslag furnace remelting, the obtained electrode bar that will be prepared in the first step carry out weight in electroslag furnace
It is molten, the steel ingot of Φ 470mm × 1200mm is made, in electroslag remelting process, it is 15mm/min to melt speed, and is carried out to above-mentioned steel ingot
Annealing, heating temperature is 1250 DEG C, and keeps the temperature 15 hours；
Third walks：Three-dimensional refinement is uniformly and the forging of FM methods, the steel ingot obtained after being made annealing treatment in second step carry out three-dimensional
Refinement is uniformly and FM methods are forged, and steps are as follows for forging：
A. the Φ 470mm × 1200mm Heating Steel Ingots obtained after being made annealing treatment in second step are to 1240 DEG C and heat preservation 10 is small
Steel ingot after heating is forged by Shi Hou：Wide × high × long ≈ 378mm × 500mm × 1100mm rectangular blooms, then by above-mentioned square
The soaking pit that shape base is put into 1200 DEG C keeps the temperature 4 hours；
B. length direction jumping-up：The rectangular bloom obtained in step a progress length direction is upset as：Wide × high × long ≈
Then above-mentioned rectangular bloom is put into 1200 DEG C of soaking pit and protected by 556mm × 680mm × 550mm, length direction upset ratio=2.0
Temperature 4 hours；
C. short transverse jumping-up：The rectangular bloom obtained in step b progress short transverse is upset as：Wide × high × long ≈
Then above-mentioned rectangular bloom is put into 1200 DEG C of soaking pit and protected by 556mm × 340mm × 1100mm, short transverse upset ratio=2.0
Temperature 4 hours；
D. width direction jumping-up：The rectangular bloom obtained in step c progress width direction is upset as：Wide × high × long ≈
Then above-mentioned rectangular bloom is put into 1200 DEG C of soaking pit and protected by 278mm × 680mm × 1100mm, width direction upset ratio=2.0
Temperature 4 hours；
E. length direction jumping-up：The rectangular bloom obtained in step d progress length direction is upset as：Wide × high × long ≈
Then above-mentioned rectangular bloom is put into 1200 DEG C of soaking pit and protected by 556mm × 680mm × 550mm, length direction upset ratio=2.0
Temperature 4 hours；
F. it pulls out：The rectangular bloom obtained in step e is drawn into using upper and lower tablet along short transverse：Wide × high × long ≈
Then above-mentioned rectangular bloom is put into 1200 DEG C of soaking pit and keeps the temperature 4 hours by 200mm × 5204mm × 200mm；
G. square billet pulls out circle：The rectangular bloom obtained in step f is drawn into round scale along short transverse：Φ200mm×
The steel ingot of 6500mm, then three-dimensional refinement at this time is uniformly and the forging of FM methods is completed；
4th step：Heat treatment after forging, the round steel of the Φ 200mm × 6500mm obtained during third is walked is at 840 DEG C
Furnace cooling after annealing 12 hours, obtains cooling after forged round steel；Cooling after forged round steel is heated to 1100 DEG C again and keeps the temperature 8 hours
Afterwards, round steel is then put into pond rapid cooling, then spheroidizing is carried out to round steel, annealing process is：12 are kept the temperature at first again 840 DEG C
Hour, it is then furnace-cooled at 740 DEG C and keeps the temperature 20 hours again, then slow cooling finally obtains shield machine cutter round steel, at this time to room temperature
Shield machine cutter is completed with steel making.
Embodiment 2：
A kind of shield machine cutter steel, the ingredient and mass percent of shield machine cutter steel are：
C：0.75%, Si：0.25%, Mn：0.54%, Cr：5.06%, Mo：2.40%, V：0.60%, P<0.020%, S
<0.005%, surplus is Fe and inevitable impurity.
A kind of manufacturing method of shield machine cutter steel, the manufacturing method include the following steps：
The first step：Induction furnace melting, by the mass percentage of each alloy raw material component element of shield machine cutter steel
Dispensing is carried out, alloy composition is made of following elements：C：0.75%, Si：0.25%, Mn：0.54%, Cr：5.06%,
Mo：2.40%, V：0.60%, surplus is Fe and inevitable impurity element, wherein impurity element P<0.020%, S<
0.005%；After dispensing, alloy compositions raw material is put into induction furnace and carries out melting, then pours into Φ 280mm × 2500mm electricity
Pole stick；
The second step：Electroslag furnace remelting, the obtained electrode bar that will be prepared in the first step carry out weight in electroslag furnace
It is molten, the steel ingot of Φ 360mm × 1350mm is made, in electroslag remelting process, it is 12mm/min to melt speed, and is carried out to above-mentioned steel ingot
Annealing, heating temperature is 1200 DEG C, and keeps the temperature 12 hours.
Third walks：Three-dimensional refinement is uniformly and the forging of FM methods, the steel ingot obtained after being made annealing treatment in second step carry out three-dimensional
Refinement is uniformly and FM methods are forged, and steps are as follows for forging：
A. the Φ 360mm × 1350mm Heating Steel Ingots obtained after being made annealing treatment in second step are to 1240 DEG C and heat preservation 10 is small
Steel ingot after heating is forged by Shi Hou：Wide × high × long ≈ 344mm × 443mm × 900mm rectangular blooms, then by above-mentioned square
The soaking pit that shape base is put into 1200 DEG C keeps the temperature 4 hours；
B. length direction jumping-up：The rectangular bloom obtained in step a progress length direction is upset as：Wide × high × long ≈
Then above-mentioned rectangular bloom is put into 1200 DEG C of soaking pit and protected by 506mm × 602mm × 450mm, length direction upset ratio=2.0
Temperature 4 hours；
C. short transverse jumping-up：The rectangular bloom obtained in step b progress short transverse is upset as：Wide × high × long ≈
Then above-mentioned rectangular bloom is put into 1200 DEG C of soaking pit and protected by 506mm × 301mm × 900mm, short transverse upset ratio=2.0
Temperature 4 hours；
D. width direction jumping-up：The rectangular bloom obtained in step c progress width direction is upset as：Wide × high × long ≈
Then above-mentioned rectangular bloom is put into 1200 DEG C of soaking pit and protected by 253mm × 602mm × 900mm, width direction upset ratio=2.0
Temperature 4 hours；
E. length direction jumping-up：The rectangular bloom obtained in step d progress length direction is upset as：Wide × high × long ≈
Then above-mentioned rectangular bloom is put into 1200 DEG C of soaking pit and protected by 506mm × 602mm × 450mm, length direction upset ratio=2.0
Temperature 4 hours；
F. it pulls out：The rectangular bloom obtained in step e is drawn into using upper and lower tablet along short transverse：Wide × high × long ≈
Then above-mentioned rectangular bloom is put into 1200 DEG C of soaking pit and keeps the temperature 4 hours by 180mm × 4241mm × 180mm；
G. square billet pulls out circle：The rectangular bloom obtained in step f is drawn into round scale along short transverse：Φ180mm×
The steel ingot of 5400mm, then three-dimensional refinement at this time is uniformly and the forging of FM methods is completed；
4th step：Heat treatment after forging, the round steel of the Φ 180mm × 5400mm obtained during third is walked is at 820 DEG C
Furnace cooling after annealing 10 hours, obtains cooling after forged round steel；Cooling after forged round steel is heated to 1050 DEG C again and keeps the temperature 5 hours
Afterwards, round steel is then put into pond rapid cooling, then spheroidizing is carried out to round steel, annealing process is：10 are kept the temperature at first again 820 DEG C
Hour, it is then furnace-cooled at 720 DEG C and keeps the temperature 15 hours again, then slow cooling finally obtains shield machine cutter round steel, at this time to room temperature
Shield machine cutter is completed with steel making.
Embodiment 3：
A kind of shield machine cutter steel, the ingredient and mass percent of shield machine cutter steel are：
C：0.73%, Si：0.20%, Mn：0.51%, Cr：5.05%, Mo：2.35%, V：0.56%, P<0.020%, S
<0.005%, surplus is Fe and inevitable impurity.
A kind of manufacturing method of shield machine cutter steel, the manufacturing method include the following steps：
The first step：Induction furnace melting, by the mass percentage of each alloy raw material component element of shield machine cutter steel
Dispensing is carried out, alloy composition is made of following elements：C：0.73%, Si：0.20%, Mn：0.51%, Cr：5.05%,
Mo：2.35%, V：0.56%, surplus is Fe and inevitable impurity element, wherein impurity element P<0.020%, S<
0.005%；After dispensing, alloy compositions raw material is put into induction furnace and carries out melting, then pours into Φ 400mm × 2100mm electricity
Pole stick；
The second step：Electroslag furnace remelting, the obtained electrode bar that will be prepared in the first step carry out weight in electroslag furnace
It is molten, the steel ingot of Φ 520mm × 1200mm is made, in electroslag remelting process, it is 14mm/min to melt speed, and is carried out to above-mentioned steel ingot
Annealing, heating temperature is 1230 DEG C, and keeps the temperature 14 hours；
Third walks：Three-dimensional refinement is uniformly and the forging of FM methods, the steel ingot obtained after being made annealing treatment in second step carry out three-dimensional
Refinement is uniformly and FM methods are forged, and steps are as follows for forging：
A. the Φ 520mm × 1200mm Heating Steel Ingots obtained after being made annealing treatment in second step are to 1240 DEG C and heat preservation 10 is small
Steel ingot after heating is forged by Shi Hou：Wide × high × long ≈ 422mm × 550mm × 1098mm rectangular blooms, then by above-mentioned square
The soaking pit that shape base is put into 1200 DEG C keeps the temperature 4 hours；
B. length direction jumping-up：The rectangular bloom obtained in step a progress length direction is upset as：Wide × high × long ≈
Then above-mentioned rectangular bloom is put into 1200 DEG C of soaking pit and protected by 620mm × 748mm × 549mm, length direction upset ratio=2.0
Temperature 4 hours；
C. short transverse jumping-up：The rectangular bloom obtained in step b progress short transverse is upset as：Wide × high × long ≈
Then above-mentioned rectangular bloom is put into 1200 DEG C of soaking pit and protected by 620mm × 374mm × 1098mm, short transverse upset ratio=2.0
Temperature 4 hours；
D. width direction jumping-up：The rectangular bloom obtained in step c progress width direction is upset as：Wide × high × long ≈
Then above-mentioned rectangular bloom is put into 1200 DEG C of soaking pit and protected by 310mm × 748mm × 1098mm, width direction upset ratio=2.0
Temperature 4 hours；
E. length direction jumping-up：The rectangular bloom obtained in step d progress length direction is upset as：Wide × high × long ≈
Then above-mentioned rectangular bloom is put into 1200 DEG C of soaking pit and protected by 620mm × 748mm × 549mm, length direction upset ratio=2.0
Temperature 4 hours；
F. it pulls out：The rectangular bloom obtained in step e is drawn into using upper and lower tablet along short transverse：Wide × high × long ≈
Then above-mentioned rectangular bloom is put into 1200 DEG C of soaking pit and keeps the temperature 4 hours by 220mm × 5260mm × 220mm；
G. square billet pulls out circle：The rectangular bloom obtained in step f is drawn into round scale along short transverse：Φ220mm×
The steel ingot of 6697mm, then three-dimensional refinement at this time is uniformly and the forging of FM methods is completed；
4th step：Heat treatment after forging, the round steel of the Φ 220mm × 6697mm obtained during third is walked is at 830 DEG C
Furnace cooling after annealing 11 hours, obtains cooling after forged round steel；Cooling after forged round steel is heated to 1080 DEG C again and keeps the temperature 6 hours
Afterwards, round steel is then put into pond rapid cooling, then spheroidizing is carried out to round steel, annealing process is：12 are kept the temperature at first again 830 DEG C
Hour, it is then furnace-cooled at 730 DEG C and keeps the temperature 18 hours again, then slow cooling finally obtains shield machine cutter round steel, at this time to room temperature
Shield machine cutter is completed with steel making.
Embodiment 1,2,3 is compared with documents parameter：
[1] Wu Xiaochun prints Kang Ying, Zuo Pengpeng, Wu Boya shield machine cutters steel alloy SDH55 and preparation method thereof, in
State's patent of invention, application number 201510273098.2.
Claims (4)
1. a kind of shield machine cutter steel, it is characterised in that：The ingredient and mass percent of shield machine cutter steel be：
C：0.70%~0.75%, Si：0.15%~0.25%, Mn：0.45%~0.55%, Cr：5.00%~5.20%,
Mo：2.30%~2.40%, V：0.50%~0.60%, P<0.020%, S<0.005%, surplus is Fe and inevitable miscellaneous
Matter.
2. a kind of manufacturing method of shield machine cutter steel described in claim 1, it is characterised in that：The manufacturing method includes
Following steps：
The first step：Induction furnace melting carries out the mass percentage of each alloy raw material component element of shield machine cutter steel
Dispensing, alloy composition are made of following elements：C：0.70%~0.75%, Si：0.15%~0.25%, Mn：0.45%
~0.55%, Cr：5.00%~5.20%, Mo：2.30%~2.40%, V：0.50%~0.60%, surplus is Fe and can not
Avoid impurity element, wherein impurity element P<0.020%, S<0.005%；After dispensing, alloy compositions raw material is put into induction furnace
Then middle carry out melting pours into Φ (400~280) mm × (2100~2500) mm electrode bars；
Second step：Electroslag furnace remelting, the obtained electrode bar that will be prepared in the first step, remelting is carried out in electroslag furnace, Φ is made
The steel ingot of (520~360) mm × (1200~1350) mm, and above-mentioned steel ingot is made annealing treatment；
Third walks：Three-dimensional refinement is uniformly and the forging of FM methods, the steel ingot obtained after being made annealing treatment in second step carry out three-dimensional refinement
Uniformly and FM methods are forged, and steps are as follows for forging：
A. Φ (520~360) mm × (1200~1350) the mm Heating Steel Ingots to 1240 obtained after being made annealing treatment in second step
DEG C and keep the temperature 10 hours after, the steel ingot after heating is forged into：Wide × high × long ≈ (422~344) mm × (550~443) mm
Then above-mentioned rectangular bloom is put into 1200 DEG C of soaking pit and keeps the temperature 4 hours by × (1100~900) mm rectangular blooms；
B. length direction jumping-up：The rectangular bloom obtained in step a progress length direction is upset as：Wide × height × long ≈ (620~
506) mm × (748~602) mm × (550~450) mm, then above-mentioned rectangular bloom is put by length direction upset ratio=2.0
1200 DEG C of soaking pit keeps the temperature 4 hours；
C. short transverse jumping-up：The rectangular bloom obtained in step b progress short transverse is upset as：Wide × height × long ≈ (620~
506) mm × (374~301) mm × (1100~900) mm, then above-mentioned rectangular bloom is put by short transverse upset ratio=2.0
1200 DEG C of soaking pit keeps the temperature 4 hours；
D. width direction jumping-up：The rectangular bloom obtained in step c progress width direction is upset as：Wide × height × long ≈ (310~
253) mm × (748~602) mm × (1100~900) mm, then above-mentioned rectangular bloom is put by width direction upset ratio=2.0
1200 DEG C of soaking pit keeps the temperature 4 hours；
E. length direction jumping-up：The rectangular bloom obtained in step d progress length direction is upset as：Wide × height × long ≈ (620~
506) mm × (748~602) mm × (550~450) mm, then above-mentioned rectangular bloom is put by length direction upset ratio=2.0
1200 DEG C of soaking pit keeps the temperature 4 hours；
F. it pulls out：The rectangular bloom obtained in step e is drawn into using upper and lower tablet along short transverse：Wide × high × long ≈ (220
~180) then above-mentioned rectangular bloom is put into 1200 DEG C of soaking pit and kept the temperature by mm × (5260~4241) mm × (220~180) mm
4 hours；
G. square billet pulls out circle：The rectangular bloom obtained in step f is drawn into round scale along short transverse：Φ (220~180) mm ×
The steel ingot of (6697~5400) mm, then three-dimensional refinement at this time is uniformly and the forging of FM methods is completed；
4th step：Heat treatment after forging, the steel ingot of the Φ obtained during third is walked (220~180) mm × (6697~5400) mm according to
Shield machine cutter round steel is obtained after secondary progress cooling after forged, annealing and ultra fine, at this time shield machine cutter steel making
It completes.
3. a kind of manufacturing method of shield machine cutter steel according to claim 2, it is characterised in that：
The second step：Electroslag furnace remelting, the obtained electrode bar that will be prepared in the first step carry out remelting in electroslag furnace, system
At the steel ingot of Φ (520~360) mm × (1200~1350) mm, in electroslag remelting process, it is 12~15mm/min to melt speed, and
Above-mentioned steel ingot is made annealing treatment, heating temperature is 1200~1250 DEG C, and keeps the temperature 12~15 hours.
4. a kind of manufacturing method of shield machine cutter steel according to claim 3, it is characterised in that：
4th step：Heat treatment after forging, the circle of the Φ obtained during third is walked (220~180) mm × (6697~5400) mm
Furnace cooling after steel is annealed 10-12 hours at 820-840 DEG C, obtains cooling after forged round steel；Cooling after forged round steel is heated again
To 1050~1100 DEG C and after keeping the temperature 5~8 hours, round steel is then put into pond rapid cooling, then spheroidizing is carried out to round steel, moved back
Ignition technique is：10~12 hours are kept the temperature at first again 820~840 DEG C, is then furnace-cooled at 720~740 DEG C and keeps the temperature 15~20 again
Hour, then slow cooling finally obtain shield machine cutter round steel to room temperature, and shield machine cutter is completed with steel making at this time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810118867.5A CN108486499A (en) | 2018-02-06 | 2018-02-06 | A kind of shield machine cutter steel and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810118867.5A CN108486499A (en) | 2018-02-06 | 2018-02-06 | A kind of shield machine cutter steel and its manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108486499A true CN108486499A (en) | 2018-09-04 |
Family
ID=63344560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810118867.5A Pending CN108486499A (en) | 2018-02-06 | 2018-02-06 | A kind of shield machine cutter steel and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108486499A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109957720A (en) * | 2019-02-26 | 2019-07-02 | 唐山志威科技有限公司 | A kind of development machine cutter ring ZW552 steel of high rigidity, high tenacity |
| CN112391581A (en) * | 2020-11-16 | 2021-02-23 | 攀钢集团江油长城特殊钢有限公司 | Hot-work shield steel and preparation method thereof |
| CN115449694A (en) * | 2022-08-22 | 2022-12-09 | 成都先进金属材料产业技术研究院股份有限公司 | Shield machine cutter and production method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000326003A (en) * | 1999-05-18 | 2000-11-28 | Nippon Steel Corp | Composite work roll for cold rolling |
| JP2005194563A (en) * | 2004-01-06 | 2005-07-21 | Sanyo Special Steel Co Ltd | High-precision die steel |
| CN104831171A (en) * | 2015-05-26 | 2015-08-12 | 上海始金新材料科技有限公司 | Alloy steel SDH55 for shield machine tools and production method thereof |
-
2018
- 2018-02-06 CN CN201810118867.5A patent/CN108486499A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000326003A (en) * | 1999-05-18 | 2000-11-28 | Nippon Steel Corp | Composite work roll for cold rolling |
| JP2005194563A (en) * | 2004-01-06 | 2005-07-21 | Sanyo Special Steel Co Ltd | High-precision die steel |
| CN104831171A (en) * | 2015-05-26 | 2015-08-12 | 上海始金新材料科技有限公司 | Alloy steel SDH55 for shield machine tools and production method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109957720A (en) * | 2019-02-26 | 2019-07-02 | 唐山志威科技有限公司 | A kind of development machine cutter ring ZW552 steel of high rigidity, high tenacity |
| CN109957720B (en) * | 2019-02-26 | 2020-09-22 | 唐山志威科技有限公司 | High-hardness and high-toughness ZW552 steel for heading machine cutter ring |
| CN112391581A (en) * | 2020-11-16 | 2021-02-23 | 攀钢集团江油长城特殊钢有限公司 | Hot-work shield steel and preparation method thereof |
| CN115449694A (en) * | 2022-08-22 | 2022-12-09 | 成都先进金属材料产业技术研究院股份有限公司 | Shield machine cutter and production method thereof |
| CN115449694B (en) * | 2022-08-22 | 2023-09-19 | 成都先进金属材料产业技术研究院股份有限公司 | Cutter of shield machine and production method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106086673B (en) | A kind of hot-work die steel plate and preparation method thereof | |
| CN105750529B (en) | A kind of high tungsten high abrasion compound high speed steel roll and preparation method thereof | |
| CN100532619C (en) | High-boron low-carbon abrasion resistant cast steel and heat treatment method thereof | |
| CN1186472C (en) | High-speed steel roll ring and its production | |
| CN101705430B (en) | High-speed steel roll and preparation method thereof by centrifugal compounding in electromagnetic field | |
| CN108220766B (en) | Cr-V hot work die steel and preparation method thereof | |
| CN103266269B (en) | HB500 grade hot continuous rolling high strength wear-resisting steel and production method thereof | |
| CN106011648B (en) | A kind of pinion steel and its production method | |
| CN112695255B (en) | Preparation method of ferrite martensite steel clad tube | |
| CN101302599A (en) | Niobium microalloyed high strength hot work die steel and preparation thereof | |
| CN110230009B (en) | Hot work die steel with good cutting performance and preparation method thereof | |
| CN110343955A (en) | A kind of crystal fining method of high intensity long life pinion steel | |
| CN102925783A (en) | Method for preparing hypereutectic high chromium white cast iron | |
| CN101649419B (en) | High-performance cold extrusion die steel and metallurgical manufacturing method thereof | |
| CN104087874B (en) | A kind of high-speed steel roll and preparation method thereof | |
| CN110157988A (en) | High-purity, the homogeneous rare earth cold roll steel alloy material of one kind and preparation method | |
| CN114411043B (en) | Preparation method of large hot forging hot work die steel | |
| CN105779867B (en) | A kind of Cutting free wear-resisting steel plate and preparation method thereof | |
| CN108486499A (en) | A kind of shield machine cutter steel and its manufacturing method | |
| CN102899589A (en) | High-strength non-tempered bainite steel and preparation method thereof | |
| CN111440930A (en) | AS NZS 3678-350L 15Z15-Z35 normalized steel plate and manufacturing method thereof | |
| CN107604248A (en) | A kind of high intensity Q500GJD quenched and tempered states steel plate for building structure and its manufacture method | |
| CN102953000B (en) | Ultrahigh-strength steel plate and manufacturing method thereof | |
| CN105543666B (en) | A kind of yield strength 960MPa beam steels and its production method | |
| CN102383044A (en) | Multicomponent low alloy high speed steel used for preparing roller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180904 |
|
| RJ01 | Rejection of invention patent application after publication |