CN105603169B - The short route manufacture method of large-scale 30CrNi2MoV steel parts - Google Patents
The short route manufacture method of large-scale 30CrNi2MoV steel parts Download PDFInfo
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- CN105603169B CN105603169B CN201610129132.3A CN201610129132A CN105603169B CN 105603169 B CN105603169 B CN 105603169B CN 201610129132 A CN201610129132 A CN 201610129132A CN 105603169 B CN105603169 B CN 105603169B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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Abstract
A kind of short route manufacture method of large-scale 30CrNi2MoV steel parts, it is characterised in that it includes the more fire time forgings carried out successively and follow-up quenching+tempering Final Heat Treatment Process；Described more fire time forge 2 upsetting pulls that 2 upsetting pulls for including carrying out successively are forged+1 jumping-up forging or carried out successively and forge+1 pulling forging of+1 jumping-up forging；Described follow-up quenching+tempering Final Heat Treatment Process refers to the tempering of oil cooling after the h of ± 10 DEG C ' 16h of+600 DEG C of quenching ± 0.5 insulations of oil cooling after the 860 DEG C of h of ± 0.5 ± 10 DEG C ' 2h of+780 DEG C of h of ± 10 DEG C ' 6h ± 0.5 insulations of forging stock progress after more fire time forgings, or the tempering of air cooling after the h of ± 10 DEG C ' 16h of+600 DEG C of quenching ± 0.5 insulations of oil cooling after 860 DEG C of h of ± 10 DEG C ' 6h ± 0.5 are incubated is carried out, or carry out the tempering of oil cooling after the h of ± 10 DEG C ' 32h of+580 DEG C of quenching ± 0.5 insulations of oil cooling after 860 DEG C of h of ± 10 DEG C ' 6h ± 0.5 are incubated.The inventive method high efficient and reliable.
Description
Technical field
The present invention relates to a kind of manufacture method of high-performance steel part, especially a kind of weight are large-scale more than 10 tons
It is strong that the forging method of 30CrNi2MoV steel parts, specifically one kind prepare thin crystal grain, low-temperature impact resistance toughness height, room temperature tensile
Spend the short route manufacture method of high 30CrNi2MoV steel parts.
Background technology
30CrNi2MoV steel is a kind of middle carbon medium alloy steel, has high quenching degree and good comprehensive mechanical property, often
For manufacturing the large forgings of high-strength and high ductility（Weight is typically more than 4 tons）, it is widely used in the power station equipments such as manufacture thermoelectricity, nuclear power
With the load in large-scale metallurgical, mine and transportation equipment and drive mechanism part.The normal work at a lower temperature of 30CrNi2MoV steel
Make, there is higher requirement to its low-temperature impact toughness.
Large forgings must be forged by large-sized casting ingot and formed, and large-sized casting ingot certainly exists the groups such as arborescent structure in manufacturing process
Knit, the inhomogeneities of composition.To meet mechanical property, large forgings must generally use the high steel grade of quenching degree high intensity, such as：
Cr-Ni- Mo-V systems steel etc..But this kind of steel overcooling austenite stability is high, Structure Inheritance tendency is big（That is martensite, bainite etc.
The phenomenon of original coarse grain is inherited and recovered to non-equilibrium original structure in austenite again）, cause large forgings crystal grain
It is thick and uneven, and then influence the performances such as its impact flexibility, brittle transition temperature, the ultrasonic wave property visited and magnetic conductivity.
In order to solve coarse grains and the problem of non-uniform that large forgings Structure Inheritance is brought, in the final of quenching+tempering
Before heat treatment, generally use is complicated at present and the cycle is very long heat treatment after forging process（Multiple normalizing, critical zone high temperature after forging
Side normalizing, high tempering, annealing etc.）Improve to add, and other heat treatment method improvements are often in addition to method for annealing
It is not apparent.
The structure property of forging has very big relation with forging technology.Forged relative to Dan Huoci, more fire time forgings can be with
By adding pyrogenetic recrystallization, austenite phase transformation etc. to improve material structure before repeatedly forging.The size of forging ratio influences forging matter
Amount, forging ratio too small but also can not be the bigger the better, and the former can cause arborescent structure to eliminate, and the latter can cause group
Knit, performance directionality it is obvious.
Up to now, it can only obtain that crystal grain is thin, low temperature by forging and the manufacture of follow-up final heat treatment there has been no a kind of
Impact flexibility is high, the Short flow method of the high 30CrNi2MoV steel forgings of room temperature strength is available, and this is limited to a certain extent
The decline of 30CrNi2MoV steel parts increased quality and manufacturing cost.
The content of the invention
The purpose of the present invention is to be required to be repeated in forging process for existing large-scale 30CrNi2MoV steel parts
Normalizing, tempering, annealing and cause the problem of manufacturing process is complicated, cost is high, performance is difficult to ensure that, invent a kind of short route forging
With follow-up quenching+tempering final heat treatment method, the high room temperature of fine grain high/low-temperature impact toughness can quickly be obtained by this method
Intensity 30CrNi2MoV steel forgings are to meet production requirement.
The technical scheme is that：
A kind of short route manufacture method of large-scale 30CrNi2MoV steel parts, it is characterised in that it includes the fire more carried out successively
Secondary forging and follow-up quenching+tempering Final Heat Treatment Process；Described more fire time forgings include the 2 upsetting pulls forging carried out successively
+ 1 jumping-up forging or 2 upsetting pulls carried out successively forge+1 jumping-up and forge+1 pulling forging；Described 2 upsetting pulls forging
Refer to that progress 2 times is pulled out in a single upsetting pull i.e. upsetting one, the forging ratio of single upsetting pull is 2-4；The forging ratio of described 1 jumping-up forging
For 3-5, the forging ratio of described 1 pulling forging is 3-5；Described follow-up quenching+tempering Final Heat Treatment Process refer to by
Forging stock after more fire time forgings carries out oil cooling after the 860 DEG C of h of ± 0.5 ± 10 DEG C ' 2h of+780 DEG C of h of ± 10 DEG C ' 6h ± 0.5 insulations
The h of ± 10 DEG C ' 16h of+600 DEG C of quenching ± 0.5 insulations after oil cooling tempering, or carry out 860 DEG C of h of ± 10 DEG C ' 6h ± 0.5 insulation
The tempering of air cooling after the h of ± 10 DEG C ' 16h of+600 DEG C of the quenching of oil cooling ± 0.5 are incubated afterwards, or carry out 860 DEG C of ± 10 DEG C ' 6h ± 0.5
The tempering of oil cooling after the h of ± 10 DEG C ' 32h of+580 DEG C of quenching ± 0.5 insulations of oil cooling after h insulations；By above-mentioned more fire time forgings and
It is 10~30mm, low-temperature impact toughness A that average grain size is obtained after follow-up quenching+temperingKV(- 40 DEG C) be 56~
103J, room temperature tensile intensity are 1157.4~1260.3 MPa, fracture elongation is 35.53~37.80% crystal grain is thin, low temperature
Impact flexibility height and the high high-performance 30CrNi2MoV steel parts of room temperature strength.
Total forging ratio that+1 jumping-up forging is forged in 2 times described upsetting pulls is 10.
Described Quenching plus tempering process be 860 DEG C ' 6h+780 DEG C ' 2h insulation after oil cooling+600 DEG C of quenching '
The tempering of oil cooling after 16h insulations.
Described steel part carries out to intert during follow-up quenching+tempering Final Heat Treatment Process after forging again
Carry out normalizing, tempering, annealing heat treatment process.
Beneficial effects of the present invention：
（1）The short route manufacturer of the high room temperature strength 30CrNi2MoV steel forgings of fine grain high/low-temperature impact toughness of the present invention
Method, Structure Inheritance can be effectively eliminated, it is 10~30mm, low-temperature impact toughness A to obtain average grain sizeKV(- 40 DEG C) are
The high-performance that 56~103J, room temperature tensile intensity are 1157.4~1260.3 MPa, fracture elongation is 35.53~37.80%
30CrNi2MoV steel forgings.
（2）The short route manufacturer of the high room temperature strength 30CrNi2MoV steel forgings of fine grain high/low-temperature impact toughness of the present invention
Method, using 2 upsetting pulls, 1 jumping-up（Or 1 jumping-up+1 pulls out）It is more fire time forgings, obtain big forging ratio, eliminate
Structure Inheritance, improve the reliability of the process.
（3）The short route manufacturer of the high room temperature strength 30CrNi2MoV steel forgings of fine grain high/low-temperature impact toughness of the present invention
Method, forging is in forging technology, Final Heat Treatment Process（Quenching+tempering）Between, it is not necessary to it is interspersed to carry out normalizing, tempering, annealing
Deng other Technologies for Heating Processing, the manufacturing process flow of the high room temperature strength 30CrNi2MoV steel forgings of fine grain high/low-temperature impact toughness
Short, production efficiency is high, and manufacturing cost is low.
（4）The present invention obtains the preferable high room temperature strength of fine grain high/low-temperature impact toughness by largely testing
The short route manufacture method of 30CrNi2MoV steel forgings, especially by using carry out in order it is more fire time forging, quenching and
Tempering process, satisfactory 30CrNi2MoV steel forgings can be readily derived by the technique of the present invention.
（5）The invention discloses a kind of the short of the high room temperature strength 30CrNi2MoV steel forgings of fine grain high/low-temperature impact toughness
Flow manufacturing method, the external technology blockage to large-scale forging stock method of manufacturing technology is broken to a certain extent, China can be met
The manufacture of large-scale load and drive mechanism part in the power station equipments such as thermoelectricity, nuclear power and large-scale metallurgical, mine and transportation equipment
Demand, meanwhile, provide technological approaches for the short route manufacture of the similar Large Steel forging stock with Structure Inheritance characteristic.
Brief description of the drawings
Fig. 1 is the embodiment of the present invention 1：+ 1 jumping-up forging is forged in 2 upsetting pulls（Total forging ratio 10）、860℃´6h+780℃
' 2h oil quenchinngs, 600 DEG C ' 16h oil coolings tempering metallographic structure,.
Fig. 2 is the embodiment of the present invention 2：2 upsetting pulls forge+1 jumping-up and forge+1 pulling forging（Total forging ratio 14）、
860 DEG C ' 6h+780 DEG C ' 2h oil quenchinngs, the metallographic structure of 600 DEG C ' 16h oil coolings tempering.
Fig. 3 is comparative example 1 of the present invention：2 upsetting pulls are forged（Total forging ratio 6）, 860 DEG C ' 6h+780 DEG C ' 2h oil quenchinngs,
The metallographic structure of 600 DEG C ' 16h oil coolings tempering.
Fig. 4 is the embodiment of the present invention 3：+ 1 jumping-up forging is forged in 2 upsetting pulls（Total forging ratio 10）, 860 DEG C ' 6h oil coolings quench
Fire, the metallographic structure of 600 DEG C ' 16h air coolings tempering.
Fig. 5 is the embodiment of the present invention 4：2 upsetting pulls forge+1 jumping-up and forge+1 pulling forging（Total forging ratio 14）、
860 DEG C ' 6h oil quenchinngs, the metallographic structure of 600 DEG C ' 16h air coolings tempering.
Fig. 6 is comparative example 2 of the present invention：2 upsetting pulls are forged（Total forging ratio 6）, 860 DEG C ' 6h oil quenchinngs, 600 DEG C ' 16h
The metallographic structure of air cooling tempering.
Fig. 7 is the embodiment of the present invention 5：+ 1 jumping-up forging is forged in 2 upsetting pulls（Total forging ratio 10）, 860 DEG C ' 6h oil coolings quench
Fire, the metallographic structure of 580 DEG C ' 32h oil coolings tempering.
Fig. 8 is the embodiment of the present invention 6：2 upsetting pulls forge+1 jumping-up and forge+1 pulling forging（Total forging ratio 14）、
860 DEG C ' 6h oil quenchinngs, the metallographic structure of 580 DEG C ' 32h oil coolings tempering.
Fig. 9 is comparative example 3 of the present invention：2 upsetting pulls are forged（Total forging ratio 6）, 860 DEG C ' 6h oil quenchinngs, 580 DEG C ' 32h
The metallographic structure of oil cooling tempering.
Figure 10 is comparative example 4 of the present invention：2 upsetting pulls are forged（Total forging ratio 6）, 860 DEG C ' 6h oil quenchinngs, 600 DEG C ' 16h
The metallographic structure of oil cooling tempering.
Embodiment
The present invention is further illustrated for Structure Figure and embodiment below, and the present embodiment is with technical solution of the present invention
Premised under implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is unlimited
In following embodiments.
Embodiment 1.
The forging of+1 jumping-up of 2 upsetting pulls is carried out to 30CrNi2MoV steel forgings base, total forging ratio is 10；Then 860 are carried out
DEG C ' 6h+780 DEG C ' 2h insulations after oil cooling+600 DEG C of quenching ' 16h insulation after oil cooling tempering.
30CrNi2MoV steel forgings through being so heat-treated, average grain size are 10~30mm（Fig. 1）, at -40 DEG C
Low-temperature impact toughness AKV(- 40 DEG C) are 103J, room temperature tensile intensity RmFor 1161.6 MPa, room temperature elongation percentage A5For 37.8%.
Embodiment 2.
The forging of 2 jumping-up+1 time of upsetting pull+1 time pullings is carried out to 30CrNi2MoV steel forgings base, total forging ratio is 14；Then
The tempering of oil cooling after+600 DEG C of quenching ' 16h of oil cooling is incubated after progress 860 DEG C ' 6h+780 DEG C ' 2h insulations.
30CrNi2MoV steel forgings through being so heat-treated, average grain size are 10~30mm（Fig. 2）, at -40 DEG C
Low-temperature impact toughness AKV(- 40 DEG C) are 87J, room temperature tensile intensity RmFor 1157.4 MPa, room temperature elongation percentage A5For 36.13%.
Comparative example 1.
The forging of 2 upsetting pulls is carried out to 30CrNi2MoV steel forgings base, total forging ratio is 6；Then 860 DEG C ' 6h+780 is carried out
DEG C ' 2h insulations after oil cooling+600 DEG C of quenching ' 16h insulation after oil cooling tempering.
30CrNi2MoV steel forgings through being so heat-treated, average grain size are 30~50mm（Fig. 3）, at -40 DEG C
Low-temperature impact toughness AKV(- 40 DEG C) are 40.3J, room temperature tensile intensity RmFor 1043.6 MPa, room temperature elongation percentage A5For 35.65%.
Embodiment 3.
The forging of+1 jumping-up of 2 upsetting pulls is carried out to 30CrNi2MoV steel forgings base, total forging ratio is 10；Then 860 are carried out
DEG C ' 6h insulations after oil cooling+600 DEG C of quenching ' 16h insulation after air cooling tempering.
30CrNi2MoV steel forgings through being so heat-treated, average grain size are 10~30mm（Fig. 4）, at -40 DEG C
Low-temperature impact toughness AKV(- 40 DEG C) are 87.67J, room temperature tensile intensity RmFor 1215.5 MPa, room temperature elongation percentage A5For
35.53%。
Embodiment 4.
The forging of 2 jumping-up+1 time of upsetting pull+1 time pullings is carried out to 30CrNi2MoV steel forgings base, total forging ratio is 14；Then
The tempering of air cooling after+600 DEG C of quenching ' 16h of oil cooling is incubated after progress 860 DEG C ' 6h insulations.
30CrNi2MoV steel forgings through being so heat-treated, average grain size are 10~30mm（Fig. 5）, at -40 DEG C
Low-temperature impact toughness AKV(- 40 DEG C) are 56J, room temperature tensile intensity RmFor 1260.3 MPa, room temperature elongation percentage A5For 36.03%.
Comparative example 2.
The forging of 2 upsetting pulls is carried out to 30CrNi2MoV steel forgings base, total forging ratio is 6；Then 860 DEG C ' 6h insulations are carried out
The tempering of air cooling after+600 DEG C of the quenching of oil cooling ' 16h is incubated afterwards.
30CrNi2MoV steel forgings through being so heat-treated, average grain size are 30~50mm（Fig. 6）, at -40 DEG C
Low-temperature impact toughness AKV(- 40 DEG C) are 26.67J, room temperature tensile intensity RmFor 1173 MPa, room temperature elongation percentage A5For 39.83%.
Embodiment 5.
The forging of+1 jumping-up of 2 upsetting pulls is carried out to 30CrNi2MoV steel forgings base, total forging ratio is 10；Then 860 are carried out
DEG C ' 6h insulations after oil cooling+580 DEG C of quenching ' 32h insulation after oil cooling tempering.
30CrNi2MoV steel forgings through being so heat-treated, average grain size are 10~30mm（Fig. 7）, at -40 DEG C
Low-temperature impact toughness AKV(- 40 DEG C) are 85.3J, room temperature tensile intensity RmFor 1215.4 MPa, room temperature elongation percentage A5For 37.10%.
Embodiment 6.
The forging of 2 jumping-up+1 time of upsetting pull+1 time pullings is carried out to 30CrNi2MoV steel forgings base, total forging ratio is 14；Then
The tempering of oil cooling after+580 DEG C of quenching ' 32h of oil cooling is incubated after progress 860 DEG C ' 6h insulations.
30CrNi2MoV steel forgings through being so heat-treated, average grain size are 10~30mm（Fig. 8）, at -40 DEG C
Low-temperature impact toughness AKV(- 40 DEG C) are 84.6J, room temperature tensile intensity RmFor 1189.8 MPa, room temperature elongation percentage A5For 36.9%.
Comparative example 3.
The forging of 2 upsetting pulls is carried out to 30CrNi2MoV steel forgings base, total forging ratio is 6；Then 860 DEG C ' 6h insulations are carried out
The tempering of oil cooling after+580 DEG C of the quenching of oil cooling ' 32h is incubated afterwards.
30CrNi2MoV steel forgings through being so heat-treated, average grain size are 30~50mm（Fig. 9）, at -40 DEG C
Low-temperature impact toughness AKV(- 40 DEG C) are 39.67J, room temperature tensile intensity RmFor 1070.1 MPa, room temperature elongation percentage A5For 35.0%.
Comparative example 4.
The forging of 2 upsetting pulls is carried out to 30CrNi2MoV steel forgings base, total forging ratio is 6；Then 860 DEG C ' 6h insulations are carried out
The tempering of oil cooling after+600 DEG C of the quenching of oil cooling ' 16h is incubated afterwards.
30CrNi2MoV steel forgings through being so heat-treated, average grain size are 30~50mm（Figure 10）, it is at -40 DEG C
Low-temperature impact toughness AKV(- 40 DEG C) are 31.67J, room temperature tensile intensity RmFor 1014.1MPa, room temperature elongation percentage A5For
37.63%。
Embodiment 7
The forging of+1 jumping-up of 2 upsetting pulls is carried out to 30CrNi2MoV steel forgings base, total forging ratio is 9；Then 870 DEG C are carried out
The tempering of oil cooling after+610 DEG C of quenching ' 15.5h of oil cooling is incubated after ' 5.5h+790 DEG C ' 1.5h insulations.
30CrNi2MoV steel forgings through being so heat-treated, combination property are suitable with embodiment 1.
Embodiment 8.
The forging of+1 jumping-up of 2 upsetting pulls is carried out to 30CrNi2MoV steel forgings base, total forging ratio is 11；Then 850 are carried out
DEG C ' 6.5h+770 DEG C ' 2.5h insulations after oil cooling+590 DEG C of quenching ' 16.5h insulation after oil cooling tempering.
30CrNi2MoV steel forgings through being so heat-treated, combination property are suitable with embodiment 1.
Embodiment 9.
The forging of 2 jumping-up+1 time of upsetting pull+1 time pullings is carried out to 30CrNi2MoV steel forgings base, total forging ratio is 10；Then
The tempering of oil cooling after+580 DEG C of quenching ' 32h of oil cooling is incubated after progress 860 DEG C ' 6h insulations.
30CrNi2MoV steel forgings through being so heat-treated, combination property are suitable with embodiment 6.
Embodiment 10.
The forging of 2 jumping-up+1 time of upsetting pull+1 time pullings is carried out to 30CrNi2MoV steel forgings base, total forging ratio is 12；Then
The tempering of oil cooling after+580 DEG C of quenching ' 32h of oil cooling is incubated after progress 860 DEG C ' 6h insulations.
30CrNi2MoV steel forgings through being so heat-treated, combination property are suitable with embodiment 6.
Part that the present invention does not relate to is same as the prior art or can be realized using prior art.
Claims (4)
1. a kind of short route manufacture method of large-scale 30CrNi2MoV steel parts, it is characterised in that it includes the multiple forging carried out successively
Make and follow-up quenching+tempering Final Heat Treatment Process；+ 1 upsetting is forged in 2 upsetting pulls that described multiple forging includes carrying out successively
Rough forging or 2 upsetting pulls carried out successively forge+1 jumping-up and forge+1 pulling forging；Described 2 upsetting pulls forging refers to list
Secondary upsetting pull is that progress 2 times is pulled out in a upsetting one, and the forging ratio of single upsetting pull is 2-4；The forging ratio of described 1 jumping-up forging is 3-5,
The forging ratio of 1 time described pulling forging is 3-5；Described follow-up quenching+tempering Final Heat Treatment Process refers to multiple forging
Forging stock after making carry out the quenching of oil cooling after the 860 DEG C of h of ± 0.5 ± 10 DEG C ' 2h of+780 DEG C of h of ± 10 DEG C ' 6h ± 0.5 insulations+
The tempering of oil cooling after the 600 DEG C of h of ± 10 DEG C ' 16h ± 0.5 insulations, or carry out oil cooling after the 860 DEG C of h of ± 10 DEG C ' 6h ± 0.5 insulations
The h of ± 10 DEG C ' 16h of+600 DEG C of quenching ± 0.5 insulations after air cooling tempering, or carry out 860 DEG C of h of ± 10 DEG C ' 6h ± 0.5 insulation
The tempering of oil cooling after the h of ± 10 DEG C ' 32h of+580 DEG C of the quenching of oil cooling ± 0.5 are incubated afterwards；Quench by above-mentioned repeatedly forging and subsequently
It is 10~30mm, low-temperature impact toughness A that average grain size is obtained after fire+temperingKV(- 40 DEG C) are 56~103J, room temperature
Tensile strength is 1157.4~1260.3 MPa, fracture elongation is 35.53~37.80% crystal grain is thin, low-temperature impact toughness
The high and high high-performance 30CrNi2MoV steel parts of room temperature strength.
2. according to the method for claim 1, it is characterized in that total forging ratio of+1 jumping-up forging is forged in 2 times described upsetting pulls
For 10.
3. according to the method for claim 1, it is characterized in that described Quenching plus tempering process is 860 DEG C ' 6h+780
DEG C ' 2h insulations after oil cooling+600 DEG C of quenching ' 16h insulation after oil cooling tempering.
4. according to the method for claim 1, it is characterized in that described steel part carries out follow-up quenching+tempering most again after forging
It need not intert during whole Technology for Heating Processing and carry out normalizing, tempering, annealing heat treatment process.
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| CN107400758A (en) * | 2017-08-07 | 2017-11-28 | 江苏大学 | A kind of 30CrNi3MoV steel large forgings dendritic segregation removing method |
| CN107513605A (en) * | 2017-08-22 | 2017-12-26 | 江苏大学 | The removing method of 35CrNi3MoV steel large forgings arborescent structures based on Composition Control |
| CN108823361B (en) * | 2018-07-11 | 2019-08-27 | 中南大学 | A kind of processing method refining 35CrMo alloy crystalline grain of steel |
| CN112872259B (en) * | 2020-12-24 | 2023-03-31 | 陕西宏远航空锻造有限责任公司 | Forging method for improving impact property of 1Cr17Ni2 |
| CN113025777A (en) * | 2021-03-02 | 2021-06-25 | 攀钢集团江油长城特殊钢有限公司 | 30CrNi2MoVA large-size forged material and preparation method thereof |
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| JP4332070B2 (en) * | 2004-06-01 | 2009-09-16 | 株式会社神戸製鋼所 | High strength steel and crankshaft for large steel products |
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