CN108165884A - A kind of smelting process of high-purity C LF-1 steel - Google Patents
A kind of smelting process of high-purity C LF-1 steel Download PDFInfo
- Publication number
- CN108165884A CN108165884A CN201810069238.8A CN201810069238A CN108165884A CN 108165884 A CN108165884 A CN 108165884A CN 201810069238 A CN201810069238 A CN 201810069238A CN 108165884 A CN108165884 A CN 108165884A
- Authority
- CN
- China
- Prior art keywords
- steel
- carried out
- remelting
- ingot
- vacuum
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C21D1/26—Methods of annealing
-
- 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
- C22C33/06—Making ferrous alloys by melting using master alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—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)
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention provides a kind of smelting process of 1 steel of high-purity C LF,It is related to metal material processing technical field,The smelting process of 1 steel of high-purity C LF includes smelting furnace charge in vaccum sensitive stove and carries out vacuum consumable remelting to ingot casting,Furnace charge smelt in vaccum sensitive stove and includes stock,Charging,Fusing,Heat preservation refining,Composition adjustment and tapping and demoulding,Vacuum consumable remelting is carried out to ingot casting and includes remelting refining,Electrode bar processing,Electric power system,Helium gas cooling,Filling,Steel ingot cools down and anneals and sampling analysis,The present invention provides a kind of smelting processes of 1 steel of high-purity C LF,1 steel of CLF produced by the present invention,Its chemical composition is qualified,Purity is high,Master alloying control accuracy is high,And smelting operation is simple,Have the characteristics that be easy to large-scale industrial production and production cost is low,In addition,1 steel of CLF also has the characteristics that can bear 3000 DEG C and moment reaches the high temperature of more than one hundred million degree.
Description
Technical field
The present invention relates to metal material processing technical fields, and in particular to a kind of smelting process of high-purity C LF-1 steel.
Background technology
Low activation martensitic steel is commonly used for the target structure material of spallation neutron target.Spallation neutron target system is Accelerator driven
Important component in subcritical (ADS) system.In ADS systems, structural material is used for beam window and target material, will be by height
The proton or neutron irradiation of energy, high intensity, therefore to select low activation steel, i.e., by high activity element Mo, Nb and Ni in steel etc.
Replaced with low active element W, Ta, V etc..
Chinese low activation martensitic steel belongs to high-purity martensite steel, it is desirable that impurity strictly controlled, it is domestic at present
Rely primarily on import.And CLF-1 steel is Chinese invention, without import, CLF-1 steel has relatively low void swelling and thermal expansion
The excellent thermophysical property such as coefficient, higher thermal conductivity.The steel chemical composition narrow range, it is extremely tight to residual elements requirement, it is right
Croop property and ballistic work also have quite high requirement.At present, " artificial sun " and ITER which equips in the distance
In project, considerable effect is played, which can ensure that pragmatic, safe, the high-end and high success rate of project.
CLF-1 should be noted that when smelting strengthens deoxidation and degassing, using the smelting process of existing low activation martensitic steel
After being smelted to CLF-1 steel, product is made, and not only purity is low, but also comprehensive mechanical property is poor.
Invention content
In view of the deficiencies of the prior art, the present invention provides a kind of smelting processes of high-purity C LF-1 steel so that CLF-1
Not only purity is high, but also comprehensive mechanical property is excellent for steel.
In order to achieve the above object, the present invention is achieved by the following technical programs：
A kind of smelting process of high-purity C LF-1 steel, includes the following steps：
(1) furnace charge is smelted in vaccum sensitive stove；
A, it stocks up：Iron, ACT, Fe-Cr intermediate alloy, J- Mn, J-Cr, J-W, J-Ta, H- are such as purified to furnace charge before smelting
V, C blocks etc. carry out clean surface processing, and to new crucible carry out iron wash, then into new crucible add in Anshan iron and steel plant pure iron ACT, to its into
Row smelts system and pre-processes to obtain purification iron, spare；
B, it feeds：Dispensing is carried out according to target martensite steel design ingredient, by pure iron, Fe-Cr intermediate alloys, J-W and complete
Portion's C blocks add in vaccum sensitive stove together；
C, it melts：Vaccum sensitive stove is evacuated to 0.1-10Pa, and furnace charge is melted, and is sampled after furnace charge fine melt；
D, heat preservation refining：Vacuum degree≤2Pa in vaccum sensitive stove is adjusted, and under conditions of temperature is 1590 ± 10 DEG C
Line frequency stirring 30min is first carried out, then carries out no line frequency stirring 60min；
E, composition adjustment and tapping：Fe-V and J-Ta alloy materials are added in into vaccum sensitive stove and into vaccum sensitive stove
After applying argon gas plus J-Mn, sampled after stirring evenly, on-line checking alloy element component, and according to test result add in J-Ca and
Other alloying elements are augmented, are tapped under 1610 ± 10 DEG C of temperature conditions using the new steel tank that slips after ingredient qualification；
F, it demoulds：Carry out vacuum pouring in ingot casting room after tapping and obtain ingot casting, after vacuum cooled >=15min can vacuum breaker,
It is demoulded after natural cooling again；
(2) vacuum consumable remelting is carried out to ingot casting；
A, remelting refining：Processing is dried to electroslag, is injected into after fusing in the crystallizer of vacuum electroslag remelting stove,
Vacuum degree of cold state≤0.13Pa, gas leakage degree≤6.67Pa/min crystallizer in ingot casting carry out remelting refining, smelt ingredient
With the steel ingot casting of interior tissue qualification；
B, electrode bar is handled：Electrode bar cuts off cap mouth, and carries out surface grinding to it；
C, electric power system：The burn-off rate of remelting consutrode, current range 9000- are controlled using power is reduced
11000A, voltage range 23-24V；
D, helium gas cooling：When steel ingot height is 150-200mm, helium is filled into vacuum electroslag remelting stove to 300-
500Pa cools down steel ingot；
E, it fills：Electrode is filled using 200 ± 10mm, filling treatment is carried out to surface of steel ingot；
F, steel ingot cooling and annealing：De- ingot is carried out after power failure 1.5h, and is annealed in time, in 400 DEG C of fashionable dresses of steel ingot temperature ＞
Stove；
G, sampling analysis：After surface of steel ingot is stripped off the skin, sampling analysis C, Mn, Ta, Al end to end.
Preferably, by weight percentage, food ingredient is as follows for food ingredient control requirement in step (1) charging：
C：0.12Wt%, Si：＜ 0.05Wt%, Mn：0.68Wt%, P：＜ 0.005Wt%, S：＜ 0.005Wt%, Cr：8.8Wt%,
W：1.55Wt%, V：0.35Wt%, Ta：0.15Wt%, Al：＜ 0.01Wt%, remaining is Fe and inevitable impurity element.
Preferably, load melting temperature is 1560 ± 10 DEG C in step (1) fusing.
Preferably, the time of natural cooling is 10h in step (1) demoulding.
Preferably, 0.05% calculation amount addition J- Ca are pressed in step (1) composition adjustment and tapping, Mn is pressed in stove
0.68% is adjusted, and J-Ta is added in by 0.15%, and the internal control of C ranging from 0.10-0.11%.
Preferably, electric current is set as in step (2) the electric power system：After early period 5h 11000A- mid-term 5h 10500A-
Phase 5h 9000A.
Advantageous effect：
The present invention provides a kind of smelting processes of high-purity C LF-1 steel, are produced by smelting process of the present invention
CLF-1 steel, chemical composition is qualified, and purity is high, and master alloying control accuracy is high, and smelting operation is simple, has and is easy to extensive
The characteristics of industrialized production and low production cost.
The present invention can significantly improve the high temperature oxidation resistance of CLF-1 steel, and CLF-1 steel is with higher high temperature resistance oxygen
While changing performance, high intensity and high tenacity are also maintained, 3000 DEG C can be born and moment reaches the high temperature of more than one hundred million degree by having
Feature；Compared with existing smelting process, not only purity is high, but also comprehensive mechanical property is excellent for the CLF-1 steel that the present invention produces.
The present invention first pre-processes molten iron before steel-making, reduces the sulfur content before molten iron-steelmaking, de- to mitigate steel-making
The burden of sulphur；Alloy material is added in the present invention stage by stage, first, can achieve the purpose that abundant deoxidation, second is that the comprehensive of steel can be improved
Close mechanical property；Present invention adjustment C content ranges, so as to control the intensity of steel and hardness, make product keep higher impact
Toughness；Ingot casting is carried out in the present invention to use helium gas cooling during vacuum consumable remelting, helium chemical property very torpescence can be right
Steel ingot is protected, and steel ingot is avoided to be further oxided, and so as to improve the high temperature oxidation resistance of product, and helium will not be with
Other alloys chemically react, in addition, raw material is more rich compared with other inert protective gas is easy to get, and at low cost for helium.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1：Induction furnace power reference curve；
Fig. 2：Consumable remelting filling is with reference to electrical force profiles；
Fig. 3：Consumable ingot annealing process curve.
Specific embodiment
Purpose, technical scheme and advantage to make the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention,
Technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is the present invention one
Divide embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
All other embodiments obtained under the premise of creative work, shall fall within the protection scope of the present invention.
Embodiment 1：
A kind of smelting process of high-purity C LF-1 steel, includes the following steps：
(1) furnace charge is smelted in vaccum sensitive stove；
A, it stocks up：Iron, ACT, Fe-Cr intermediate alloy, J- Mn, J-Cr, J-W, J-Ta, H- are such as purified to furnace charge before smelting
V, C blocks etc. carry out clean surface processing, and to new crucible carry out iron wash, then into new crucible add in Anshan iron and steel plant pure iron ACT, to its into
Row smelts system and pre-processes to obtain purification iron, spare；
B, it feeds：Dispensing is carried out according to target martensite steel design ingredient, by pure iron, Fe-Cr intermediate alloys, J-W and complete
Portion's C blocks add in vaccum sensitive stove together；
C, it melts：Vaccum sensitive stove is evacuated to 5Pa, and furnace charge is melted at a temperature of 1560 ± 10 DEG C, stove
It is sampled after material fine melt；
D, heat preservation refining：Vacuum degree≤2Pa in vaccum sensitive stove is adjusted, and under conditions of temperature is 1590 ± 10 DEG C
Line frequency stirring 30min is first carried out, then carries out no line frequency stirring 60min；
E, composition adjustment and tapping：Fe-V and J-Ta alloy materials are added in into vaccum sensitive stove and into vaccum sensitive stove
After applying argon gas plus J-Mn, sampled after stirring evenly, on-line checking alloy element component, and according to test result add in J-Ca and
Other alloying elements are augmented, are tapped under 1610 ± 10 DEG C of temperature conditions using the new steel tank that slips after ingredient qualification；
F, it demoulds：Carry out vacuum pouring in ingot casting room after tapping and obtain ingot casting, after vacuum cooled >=15min can vacuum breaker,
It is demoulded after natural cooling 10h again；
(2) vacuum consumable remelting is carried out to ingot casting；
A, remelting refining：Processing is dried to electroslag, is injected into after fusing in the crystallizer of vacuum electroslag remelting stove,
Vacuum degree of cold state≤0.13Pa, gas leakage degree≤6.67Pa/min crystallizer in ingot casting carry out remelting refining, smelt ingredient
With the steel ingot casting of interior tissue qualification；
B, electrode bar is handled：Electrode bar cuts off cap mouth, and carries out surface grinding to it；
C, electric power system：The burn-off rate of remelting consutrode, current range 9000- are controlled using power is reduced
11000A, voltage range 23-24V；
D, helium gas cooling：When steel ingot height is 180mm, helium is filled into vacuum electroslag remelting stove to 400Pa, to steel ingot
It is cooled down；
E, it fills：Electrode is filled using 200 ± 10mm, filling treatment is carried out to surface of steel ingot；
F, steel ingot cooling and annealing：De- ingot is carried out after power failure 1.5h, and is annealed in time, in 400 DEG C of fashionable dresses of steel ingot temperature ＞
Stove；
G, sampling analysis：After surface of steel ingot is stripped off the skin, sampling analysis C, Mn, Ta, Al end to end.
Wherein, by weight percentage, food ingredient is as follows for food ingredient control requirement in step (1) charging：C：
0.12Wt%, Si：＜ 0.05Wt%, Mn：0.68Wt%, P：＜ 0.005Wt%, S：＜ 0.005Wt%, Cr：8.8Wt%, W：
1.55Wt%, V：0.35Wt%, Ta：0.15Wt%, Al：＜ 0.01Wt%, remaining is for Fe and inevitably.
Claims (6)
1. a kind of smelting process of high-purity C LF-1 steel, which is characterized in that include the following steps：
(1) furnace charge is smelted in vaccum sensitive stove；
A, it stocks up：Iron, ACT, Fe-Cr intermediate alloy, J-Mn, J-Cr, J-W, J-Ta, H-V, C block are such as purified to furnace charge before smelting
Deng progress clean surface processing, and iron is carried out to new crucible and is washed, then Anshan iron and steel plant pure iron ACT is added in into new crucible, smelting is carried out to it
Purification iron is refined and pre-processes and to obtain, it is spare；
B, it feeds：Dispensing is carried out according to target martensite steel design ingredient, by pure iron, Fe-Cr intermediate alloys, J-W and whole C blocks
Vaccum sensitive stove is added in together；
C, it melts：Vaccum sensitive stove is evacuated to 0.1-10Pa, and furnace charge is melted, and is sampled after furnace charge fine melt；
D, heat preservation refining：Vacuum degree≤2Pa in vaccum sensitive stove is adjusted, and is first carried out under conditions of being 1590 ± 10 DEG C in temperature
Line frequency stirring 30min, then carry out no line frequency stirring 60min；
E, composition adjustment and tapping：Fe-V and J-Ta alloy materials and the argon filling into vaccum sensitive stove are added in into vaccum sensitive stove
Add J-Mn after gas, sampled after stirring evenly, on-line checking alloy element component, and J-Ca and supplement are added according to test result
Other alloying elements are tapped after ingredient qualification under 1610 ± 10 DEG C of temperature conditions using the new steel tank that slips；
F, it demoulds：Carry out vacuum pouring in ingot casting room after tapping and obtain ingot casting, after vacuum cooled >=15min can vacuum breaker, then from
So demoulded after cooling；
(2) vacuum consumable remelting is carried out to ingot casting；
A, remelting refining：Processing is dried to electroslag, is injected into after fusing in the crystallizer of vacuum electroslag remelting stove, in cold conditions
Vacuum degree≤0.13Pa, gas leakage degree≤6.67Pa/min crystallizer in remelting refining is carried out to ingot casting, smelt ingredient and interior
The qualified steel ingot casting of portion's tissue；
B, electrode bar is handled：Electrode bar cuts off cap mouth, and carries out surface grinding to it；
C, electric power system：The burn-off rate of remelting consutrode, current range 9000- are controlled using power is reduced
11000A, voltage range 23-24V；
D, helium gas cooling：When steel ingot height is 150-200mm, helium is filled into vacuum electroslag remelting stove to 300-500Pa, it is right
Steel ingot is cooled down；
E, it fills：Electrode is filled using 200 ± 10mm, filling treatment is carried out to surface of steel ingot；
F, steel ingot cooling and annealing：De- ingot is carried out after power failure 1.5h, and is annealed in time, the shove charge in 400 DEG C of steel ingot temperature ＞；
G, sampling analysis：After surface of steel ingot is stripped off the skin, sampling analysis C, Mn, Ta, Al end to end.
It is 2. as described in claim 1, which is characterized in that food ingredient control requirement by weight hundred in step (1) charging
Divide than counting, food ingredient is as follows：C：0.12Wt%, Si：＜ 0.05Wt%, Mn：0.68Wt%, P：＜ 0.005Wt%, S：＜
0.005Wt%, Cr：8.8Wt%, W：1.55Wt%, V：0.35Wt%, Ta：0.15Wt%, Al：＜ 0.01Wt%, remaining is Fe
And inevitable impurity element.
It is 3. as described in claim 1, which is characterized in that load melting temperature is 1560 ± 10 DEG C in step (1) fusing.
It is 4. as described in claim 1, which is characterized in that the time of natural cooling is 10h in step (1) demoulding.
It is 5. as described in claim 1, which is characterized in that press 0.05% calculation amount in step (1) composition adjustment and tapping
J-Ca is added in, Mn is adjusted by 0.68% in stove, and J-Ta is added in by 0.15%, and the internal control of C ranging from 0.10-
0.11%.
It is 6. as described in claim 1, which is characterized in that electric current is set as in step (2) the electric power system：Early period 5h
11000A- mid-term 5h 10500A- later stage 5h 9000A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810069238.8A CN108165884A (en) | 2018-01-24 | 2018-01-24 | A kind of smelting process of high-purity C LF-1 steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810069238.8A CN108165884A (en) | 2018-01-24 | 2018-01-24 | A kind of smelting process of high-purity C LF-1 steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108165884A true CN108165884A (en) | 2018-06-15 |
Family
ID=62515402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810069238.8A Pending CN108165884A (en) | 2018-01-24 | 2018-01-24 | A kind of smelting process of high-purity C LF-1 steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108165884A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110230002A (en) * | 2019-07-30 | 2019-09-13 | 攀钢集团江油长城特殊钢有限公司 | A kind of martensite steel and preparation method thereof |
| CN116377314A (en) * | 2023-06-05 | 2023-07-04 | 成都先进金属材料产业技术研究院股份有限公司 | Martensitic heat-resistant steel for gas turbine and smelting method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1861825A (en) * | 2006-05-27 | 2006-11-15 | 中国科学院等离子体物理研究所 | Structure steel material suitable for fusion reactor |
| CN101328522A (en) * | 2008-07-17 | 2008-12-24 | 中国科学院等离子体物理研究所 | Smelting production method of low activation martensitic steel for fusion reactor |
-
2018
- 2018-01-24 CN CN201810069238.8A patent/CN108165884A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1861825A (en) * | 2006-05-27 | 2006-11-15 | 中国科学院等离子体物理研究所 | Structure steel material suitable for fusion reactor |
| CN101328522A (en) * | 2008-07-17 | 2008-12-24 | 中国科学院等离子体物理研究所 | Smelting production method of low activation martensitic steel for fusion reactor |
Non-Patent Citations (2)
| Title |
|---|
| 姜周华等: "特殊钢特种冶金技术的新发展", 《中国冶金》 * |
| 宋文林: "《感应炉炼钢问答》", 31 May 1997, 冶金工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110230002A (en) * | 2019-07-30 | 2019-09-13 | 攀钢集团江油长城特殊钢有限公司 | A kind of martensite steel and preparation method thereof |
| CN116377314A (en) * | 2023-06-05 | 2023-07-04 | 成都先进金属材料产业技术研究院股份有限公司 | Martensitic heat-resistant steel for gas turbine and smelting method thereof |
| CN116377314B (en) * | 2023-06-05 | 2023-10-27 | 成都先进金属材料产业技术研究院股份有限公司 | Martensitic heat-resistant steel for gas turbine and smelting method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101328522B (en) | Smelting production method of low activation martensitic steel for fusion reactor | |
| CN102758144B (en) | Production method for steel ingot of large-sized high-nitrogen retaining ring steel | |
| CN105088094B (en) | A kind of manufacture method for controlling nitrogen austenitic stainless steel heavy forging | |
| CN108456799A (en) | A kind of high-performance copper ferroalloy materials and its electroslag remelting preparation method | |
| CN104032233A (en) | Austenite stainless steel and a manufacturing technology thereof | |
| CN103498066B (en) | A kind of containing Mg superalloy smelting process | |
| CN106086598A (en) | A kind of high cleanliness austenite is without the smelting process of magnetic Retaining Ring Steel | |
| CN106636861B (en) | The preparation technology of high-alloy hot work mould steel | |
| CN107164639A (en) | A kind of electron beam covers the method that formula solidification technology prepares high temperature alloy | |
| CN108546880A (en) | Steel BG22SiMnNi2CrMoA and preparation method thereof | |
| CN103962747A (en) | Nickel base alloy welding wire with diameter smaller than 3 mm | |
| CN108165884A (en) | A kind of smelting process of high-purity C LF-1 steel | |
| CN107541591B (en) | A kind of manufacturing method of super electromagnetic pure iron DT4C bar | |
| CN108531815A (en) | High temperature bolt steel BG25Cr2MoVA and preparation method thereof | |
| CN104313494B (en) | The smelting process of steel SA-335P92 for a kind of super critical boiler | |
| CN103962755A (en) | Method for preparing nickel base alloy welding wire with diameter smaller than 3 mm | |
| CN103540856A (en) | 3Cr17NiMoV stainless steel strip and preparation method | |
| CN102477474B (en) | Sulfur feeding method for smelting molten steel in vacuum induction furnace | |
| CN114032441A (en) | Method for smelting ultra-low carbon stainless steel in vacuum induction furnace | |
| CN110629116B (en) | Vacuum consumable melting method of 0Cr13Ni8Mo2Al stainless steel | |
| CN109022661A (en) | A method of it reducing Properties of Heavy Rail Steel and hurts rail rate | |
| CN110230002A (en) | A kind of martensite steel and preparation method thereof | |
| CN113403492B (en) | Preparation method of ultra-low-sulfur high-temperature alloy | |
| Schwenk et al. | Role and effects of slag components in ESR processes | |
| CN103949800A (en) | Welding wire made of Cr28 Ni48 W5 nickel base alloy |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180615 |