CN106834730A - A kind of method that electroslag remelting technique that pressurizes smelts high-quality high-speed steel - Google Patents

A kind of method that electroslag remelting technique that pressurizes smelts high-quality high-speed steel Download PDF

Info

Publication number
CN106834730A
CN106834730A CN201611253658.9A CN201611253658A CN106834730A CN 106834730 A CN106834730 A CN 106834730A CN 201611253658 A CN201611253658 A CN 201611253658A CN 106834730 A CN106834730 A CN 106834730A
Authority
CN
China
Prior art keywords
pressure
electroslag remelting
slag charge
speed steel
melting
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
Application number
CN201611253658.9A
Other languages
Chinese (zh)
Inventor
姜周华
刘福斌
余嘉
李花兵
耿鑫
陈奎
李星
钱瑞清
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Northeastern University China
Original Assignee
Northeastern University China
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Northeastern University China filed Critical Northeastern University China
Priority to CN201611253658.9A priority Critical patent/CN106834730A/en
Publication of CN106834730A publication Critical patent/CN106834730A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/16Remelting metals
    • C22B9/18Electroslag remelting
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C33/00Making ferrous alloys
    • C22C33/04Making ferrous alloys by melting

Abstract

The invention provides the smelting process that a kind of electroslag remelting technique that pressurizes smelts high-quality high-speed steel, specifically include:Slag charge prepares, and melts slag charge;The pressure in working chamber is progressively brought up into 2MPa~3MPa after slag charge is melting down, and synchronously increases the pressure of cooling water, carry out electroslag remelting;The melting later stage carries out feeding operation;Melting reduces melting indoor gas and cooling water pressure after terminating, and ingot casting is at ambient pressure to room temperature.Air gap between ingot casting and crystallizer can be reduced using method of the present invention smelting high-quality high-speed steel, cooldown rate is improved, promote the refinement of solidified structure, improve the red hardness and wearability of high-speed steel.

Description

A kind of method that electroslag remelting technique that pressurizes smelts high-quality high-speed steel
Technical field
The present invention relates to a kind of high-speed steel smelting process, it is high that more particularly to a kind of pressurization electroslag remelting technique smelts high-quality The smelting process of fast steel.
Background technology
High-speed steel refers generally to the heat resisting steel with high rigidity in a state of use, because this steel contains substantial amounts of alloy unit Plain tungsten, molybdenum, chromium, vanadium etc., form more eutectic carbide, i.e. ledeburite organization in as-cast structure, therefore are Lay also known as it Family name's body steel.Because high-speed steel can still keep high rigidity and high-wearing feature at 500 DEG C~600 DEG C, it is widely used in making at a high speed Cutting tool, cold extruding die and punch die etc..
High-speed steel due to containing carbon and alloying element higher, the segregation of carbon being difficult to avoid that in process of setting, and easily Thick net carbide is formed on crystal boundary causes the fragility to increase.An effective means for reducing carbide segregation at present is to carry High cooldown rate, cooldown rate is faster, and the proeutectoid carbide of precipitation is fewer, and eutectic ledeburite net is also thinner.Cooldown rate Speed can also influence the type of eutectic carbide, and cooldown rate is faster, and eutectic carbide is by by the M of near-equilibrium state6C is changed into metastable M2C, metastable M2C can decompose in follow-up heat treatment process, further make carbide refinement, be evenly distributed.
Need the molten steel of external refining to be cast into the consutrode of electroslag remelting in traditional H.S.S. production technique, profit Carry out double refining with electroslag remelting technique, to improve the degree of purity of steel, improve the macrostructure of steel, refine ingot casting tissue and Carbide.Traditional electroslag remelting technique ingot casting in process of setting due to solidification shrinkage, between ingot casting surface and crystallizer wall Air gap is formed, reduces the heat transfer coefficient of ingot casting wall, limit the further raising of ingot casting cooldown rate.
Pressurization electroslag remelting technique is a new technology in electroslag metallurgy field, and industrialization is had been realized in Germany, its Maximum pressure in working chamber is up to 4.2MPa.Because metal bath has good mobility near solidus, increase steel There is substantially deformation in the static pressure two-phase section in liquid, ingot casting is close to crystallizer wall, reduces and even eliminates ingot casting and crystallizer Between air gap, and then significantly increase the interface heat exchange coefficient between ingot casting and crystallizer improve ingot casting cooldown rate.Tradition In esr process, the complex heat transfer coefficient between ingot casting and crystallizer wall is 300W/ (m2K)~500W/ (m2K), When pressure increases to 1.5MPa from normal pressure, its interface integrated heat transfer coefficient increases to 500W/ (m2K)~1200W/ (m2· K).Using pressurization electroslag remelting technique Smelting High Speed Steel, the advantage of traditional esr process is not only remained, one can also be entered Step reduces the air gap between ingot casting and crystallizer wall;Meanwhile, under pressure effect, ingot casting and bottom water tank contact increase, and carry The cooldown rate of ingot casting high, thinning solidification structure improves the uniformity of carbide.
The selection of smelting process and melting pressure is smelted using pressurization electroslag remelting technique in pressurization esr process The core technology of high-speed steel, is directly connected to the quality of end product quality.Therefore, how to select rational technological parameter is to adopt Smelt dense structure with pressurization electroslag remelting technique, carbide size is tiny, the key issue of high-speed steel that is evenly distributed.
The content of the invention
In order to solve using the air gap during traditional electroslag remelting technique Smelting High Speed Steel between ingot casting and crystallizer compared with Greatly, the problem that the cooldown rate of ingot casting is further improved is limited, the invention provides one kind using pressurization electroslag remelting technique The smelting process of Smelting High Speed Steel.The method can not only retain the advantage of traditional electroslag remelting, can also reduce and even eliminate Air gap between ingot casting and crystallizer wall, increase ingot casting and bottom water tank contact, further improve the cooldown rate of ingot casting, carefully Change solidified structure, improve the uniformity of carbide.
The step of a kind of electroslag remelting technique that pressurizes of the invention smelts the method for high-quality high-speed steel is as follows:
(1) preparation of slag charge
Slag charge is prepared first, is put into after mixing in resistance furnace at 600 DEG C~800 DEG C and toasted 4~6 hours, fully go slagging-off Moisture in material, is then shut off power supply, allows slag charge to lower the temperature with stove;Then by heelpiece, the slag charge of material identical with smelted steel grade Bottom water tank center is put into striking bits;
(2) slag charge is melted
The furnace shell closed furnace body on top is installed, then argon is passed through to the speed in working chamber with 10L/min~15L/min Gas 5min~10min, excludes the air in working chamber, while to water at atmospheric pressure is passed through in crystallizer, using the method for solid slag startup Slugging, its slugging voltage is 35V~40V, and slugging electric current is 2000A~3000A, and the slugging time is 15min~30min.
(3) pressurize electroslag remelting
After slag charge is melting down, gradually increase the pressure of argon gas in working chamber to 2MPa~3MPa, and synchronously increase cooling water Pressure, makes crystallizer both sides water and the pressure of gas be consistent substantially.Hereafter voltage and current is adjusted, it is formal to enter melting rank Section.
(4) decreasing power feeding
In the electroslag remelting later stage, in order to ensure the Solidification Quality on ingot casting top, it is necessary to carry out the feeding operation of decreasing power, Under conditions of the ratio for ensureing fire door voltage/melting current is constant, while reducing voltage and current in proportion, the work(that successively decreases is reached The purpose of rate.
(5) the pressure release demoulding
After feeding terminates, lifting electrode simultaneously closes power supply, opens relief valve and lets out to normal pressure, and synchronously reduces the pressure of cooling water Power, the demoulding after waiting ingot casting to cool down completely.
According to the method that pressurization electroslag remelting technique disclosed by the invention smelts high-quality high-speed steel, will be with smelted steel grade The heelpiece of same material, slag charge and striking agent are all put into bottom water tank, the method slugging started using solid slag.
According to the method that pressurization electroslag remelting technique disclosed by the invention smelts high-quality high-speed steel, used during slugging Pressure during normal pressure, normal smelting in working chamber using 2MPa~3MPa.During slugging use normal pressure, it is possible to reduce slag bath to The radiating of crystallizer, improves slugging efficiency.Pressure during normal smelting in working chamber using 2MPa~3MPa, can reduce casting The cooling effect of the air gap between ingot and crystallizer, reinforcing crystallizer and bottom water tank, improves the cooldown rate of ingot casting.
According to the method that pressurization electroslag remelting technique disclosed by the invention smelts high-quality high-speed steel, it is adopted in melting latter stage Operated with the feeding of power decay.In melting latter stage, keep the Ratio invariableness of voltage/current, at the same reduce in proportion electric current and Voltage, reaches the effect of feeding, to obtain more preferable Solidification Quality.
According to the method that pressurization electroslag remelting technique disclosed by the invention smelts high-quality high-speed steel, after melting terminates, Open relief valve to let out to normal pressure, and synchronously reduce the pressure of cooling water, ingot casting is cooled to room temperature at ambient pressure.
According to the method that pressurization electroslag remelting technique disclosed by the invention smelts high-quality high-speed steel, enter at ambient pressure first Row slugging, the pressure being then lifted out in working chamber to 2MPa~3MPa carries out pressurization melting.The method can not only retain tradition The advantage of esr process, improves the degree of purity of ingot casting, improves the quality of ingot casting macrostructure, moreover it is possible under the effect of the pressure Reduce the cooling effect of air gap, reinforcing crystallizer and bottom water tank, improve the cooldown rate of ingot casting, thinning solidification structure improves carbon The uniformity of compound distribution, so that obtaining, metallurgical quality is good, the high-speed steel ingot casting of excellent performance.
Specific embodiment
Specific embodiment of the invention is described in detail with reference to embodiment, but specific embodiment of the invention not office It is limited to following embodiments.
Embodiment 1
M42 high-speed steel is smelted using pressurization electroslag remelting technique, its chemical composition is as shown in table 1.Crystallizer diameter 200mm, electrode diameter 140mm, electrode insertion depth 15mm.
M42 high-speed steel chemical composition ranges (wt.%) of table 1
The step of smelting M42 high-speed steel using pressurization electroslag remelting technique is as follows:
(1) preparation of slag charge
Slag charge is prepared first, and the mass percent of slag charge is CaF2:55%, CaO:20%, Al2O3:20%, SiO2:5%, The quantity of slag is 10kg, and resistance furnace is put into after mixing, is toasted 5 hours at 600 DEG C, the moisture in removal slag charge, is then shut off power supply Slag charge is allowed to lower the temperature with stove;Then the heelpiece of material identical with smelted steel grade, slag charge and striking bits are put into bottom water tank center;
(2) slag charge is melted
The furnace shell closed furnace body on top is installed, argon gas 10min is then passed through with the speed of 11L/min in working chamber, The air in working chamber is excluded, while to water at atmospheric pressure is passed through in crystallizer, using the method slugging of solid slag startup, slugging voltage is 35V, slugging electric current is 2000A, and the slugging time is 15min.
(3) pressurize electroslag remelting
After slag charge is melting down, gradually increase the pressure of argon gas in working chamber to 2.3MPa, and synchronously increase the pressure of cooling water, It is consistent crystallizer both sides water and the pressure of gas.Hereafter adjustment voltage and current is respectively 45V and 4500A, formally enters Enter smelt stage.
(4) decreasing power feeding
In the electroslag remelting later stage, in order to ensure the Solidification Quality on ingot casting top, it is necessary to carry out the feeding operation of decreasing power. Under conditions of the ratio for ensureing fire door voltage/melting current is constant, while reducing voltage and current in proportion, electric current is per 5min Reduce 500A.
(5) the pressure release demoulding
Feeding terminates rear lifting electrode and closes power supply, opens relief valve and lets out to normal pressure, and synchronously reduces the pressure of cooling water, The demoulding after being cooled down completely Deng ingot casting.
Ingot casting after the demoulding is heated to 1180 DEG C, 2 hours are incubated, the pole of φ 40mm is in axial direction forged into, eventually Forging temperature is 910 DEG C.The annealing temperature of annealing process is 880 DEG C, and annealing time is 10 hours.According to GB/T14979-94 Standard, is corroded after sampling with 10% nital, and carbide particle degree and unevenness are evaluated, and and normal pressure The result of electroslag remelting is compared, as a result as shown in table 2 below.As can be seen from Table 2, the M42 of pressurization electric slag refusion and smelting is high Carbide size is tiny in fast steel ingot casting, and distribution is conducive to improving the red hardness and wearability of high-speed steel than more uniform.
The granularity and unevenness grade of the carbide of table 2
Embodiment 2
M2 high-speed steel is smelted using pressurization electroslag remelting technique, its chemical composition is as shown in table 3 below.Crystallizer diameter 350mm, electrode diameter 220mm, electrode insertion depth 10mm.
M2 high-speed steel chemical composition ranges (wt.%) of table 3
The step of smelting M2 high-speed steel using pressurization electroslag remelting technique is as follows:
(1) preparation of slag charge
Slag charge is prepared first, and the mass percent of slag charge is CaF2:70%, Al2O3:30%, the quantity of slag is 30kg, after mixing Resistance furnace is put into, is toasted 5 hours at 600 DEG C, the moisture in removal slag charge is then shut off power supply and lowers the temperature with stove by slag charge;So The heelpiece of material identical with smelted steel grade, slag charge and striking bits are put into bottom water tank center afterwards;
(2) slag charge is melted
The furnace shell closed furnace body on top is installed, then argon is passed through to the speed in working chamber with 10L/min~15L/min Gas 8min, excludes the air in working chamber, while to water at atmospheric pressure is passed through in crystallizer, using the method slugging of solid slag startup.Change Slag voltage is 35V, and slugging electric current is 2200A, and the slugging time is 20min.
(3) pressurize electroslag remelting
After slag charge is melting down, gradually increase the pressure of argon gas in working chamber to 2.8MPa, and synchronously increase the pressure of cooling water, Crystallizer both sides water and the pressure of gas is set to be consistent substantially.Hereafter adjustment voltage and current is respectively 48V and 6500A, just Formula enters smelt stage.
(4) decreasing power feeding
In the electroslag remelting later stage, in order to ensure the Solidification Quality on ingot casting top, it is necessary to carry out the feeding operation of decreasing power. Under conditions of the ratio for ensureing fire door voltage/melting current is constant, while reducing voltage and current in proportion, electric current is per 5min Reduce 500A.
(5) the pressure release demoulding
Feeding terminates rear lifting electrode and closes power supply, opens relief valve and lets out to normal pressure, and synchronously reduces the pressure of cooling water, The demoulding after being cooled down completely Deng ingot casting.
Ingot casting after the demoulding is heated to 1160 DEG C, 3 hours are incubated, the pole of φ 80mm is in axial direction forged into, eventually Forging temperature is 940 DEG C.The annealing temperature of annealing process is 920 DEG C, and annealing time is 12 hours.According to GB/T14979-94 Standard, is corroded after sampling with 10% nital, and carbide particle degree and unevenness are evaluated, and and normal pressure The result of electroslag remelting is compared, as a result as shown in table 4 below.As can be seen from Table 4, pressurization electric slag refusion and smelting M2 at a high speed Carbide size is tiny in steel ingot casting, and distribution is conducive to improving the red hardness and wearability of high-speed steel than more uniform.
The granularity and unevenness grade of the carbide of table 4
Embodiment 3
W9Mo3Cr4V high-speed steel is smelted using pressurization electroslag remelting technique, its chemical composition is as shown in table 5 below.Crystallizer Diameter 500mm, electrode diameter 350mm, electrode insertion depth 10mm.
W9Mo3Cr4V high-speed steel chemical composition ranges (wt.%) of table 5
The step of smelting W9Mo3Cr4V high-speed steel using pressurization electroslag remelting technique is as follows:
(1) preparation of slag charge
Slag charge is prepared first, and the mass percent of slag charge is CaF2:40%, CaO:30%, Al2O3:30%, the quantity of slag is 66kg, is put into resistance furnace after mixing, toasted 4~6 hours at 600 DEG C~800 DEG C, the moisture in removal slag charge, is then shut off Power supply is lowered the temperature by slag charge with stove;Then the heelpiece of material identical with smelted steel grade, slag charge and striking bits are put into the water tank of bottom Centre;
(2) slag charge is melted
The furnace shell closed furnace body on top is installed, then argon gas is passed through to the speed in working chamber with 10L/min~15L/min 5min~10min, excludes the air in working chamber, while to water at atmospheric pressure is passed through in crystallizer, using the method for solid slag startup Slag.Slugging voltage is 38V, and slugging electric current is 3500A, and the slugging time is 25min.
(3) pressurize electroslag remelting
After slag charge is melting down, gradually increase the pressure of argon gas in working chamber to 2MPa~3MPa, and synchronously increase cooling water Pressure, makes crystallizer both sides water and the pressure of gas be consistent substantially.Hereafter adjustment voltage and current be respectively 50V and 10000A, formally into smelt stage.
(4) decreasing power feeding
In the electroslag remelting later stage, in order to ensure the Solidification Quality on ingot casting top, it is necessary to carry out the feeding operation of decreasing power. Under conditions of the ratio for ensureing fire door voltage/melting current is constant, while reducing voltage and current in proportion, electric current is per 5min Reduce 500A.
(5) the pressure release demoulding
Feeding terminates rear lifting electrode and closes power supply, opens relief valve and lets out to normal pressure, and synchronously reduces the pressure of cooling water, The demoulding after being cooled down completely Deng ingot casting.
Ingot casting after the demoulding is heated to 1140 DEG C, 4 hours are incubated, the pole of φ 100mm is in axial direction forged into, eventually Forging temperature is 920 DEG C.The annealing temperature of annealing process is 750 DEG C, and annealing time is 14 hours.According to GB/T14979-94 Standard, is corroded after sampling with 10% nital, and carbide particle degree and unevenness are evaluated, and and normal pressure The result of electroslag remelting is compared, as a result as shown in table 6 below.As can be seen from Table 6, pressurize electric slag refusion and smelting Carbide size is tiny in W9Mo3Cr4V high-speed steel ingot castings, and distribution is conducive to improving the red hardness of high-speed steel and resistance to than more uniform Mill property.
The granularity and unevenness grade of the carbide of table 6

Claims (2)

1. a kind of method that electroslag remelting technique that pressurizes smelts high-quality high-speed steel, it is characterised in that methods described includes as follows Step:
(1) slag charge is prepared, is put into after mixing in resistance furnace at 600 DEG C~800 DEG C and is toasted 4~6 hours fully removal slag charge reclaimed waters Point, close power supply and lower the temperature with stove by slag charge, the heelpiece of material identical with smelted steel grade, slag charge and striking bits are then put into electricity Slag hearth bottom water tank center;
(2) the furnace shell closed furnace body on top is installed, then argon is passed through to the speed in working chamber with 10L/min~15L/min Gas 5min~10min, while to water at atmospheric pressure is passed through in crystallizer, using the method slugging of solid slag startup;
(3) after slag charge is melting down, the pressure of argon gas in working chamber is gradually increased to 2MPa~3MPa, and synchronously increase the pressure of cooling water Power, makes crystallizer both sides water and the pressure of gas be consistent substantially.Hereafter voltage and current is adjusted, it is formal to enter melting rank Section;
(4) the electroslag remelting later stage under the ratio permanence condition for ensureing fire door voltage/melting current, while reducing voltage in proportion With current step-down power feeding;
(5) after feeding terminates, lifting electrode simultaneously closes power supply, opens relief valve and lets out to normal pressure, and synchronously reduces the pressure of cooling water Power, the demoulding after waiting ingot casting to cool down completely.
2. the method that a kind of electroslag remelting technique that pressurizes according to claim 1 smelts high-quality high-speed steel, its feature exists In the method slugging that the described use solid slag in step (2) starts, its slugging voltage is 35V~40V, and slugging electric current is 2000A~3000A, the slugging time is 15min~30min.
CN201611253658.9A 2016-12-30 2016-12-30 A kind of method that electroslag remelting technique that pressurizes smelts high-quality high-speed steel Pending CN106834730A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611253658.9A CN106834730A (en) 2016-12-30 2016-12-30 A kind of method that electroslag remelting technique that pressurizes smelts high-quality high-speed steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611253658.9A CN106834730A (en) 2016-12-30 2016-12-30 A kind of method that electroslag remelting technique that pressurizes smelts high-quality high-speed steel

Publications (1)

Publication Number Publication Date
CN106834730A true CN106834730A (en) 2017-06-13

Family

ID=59115250

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201611253658.9A Pending CN106834730A (en) 2016-12-30 2016-12-30 A kind of method that electroslag remelting technique that pressurizes smelts high-quality high-speed steel

Country Status (1)

Country Link
CN (1) CN106834730A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107576679A (en) * 2017-08-31 2018-01-12 辽宁科技大学 A kind of method for the ESR ingot Local cooling speed for demarcating electroslag remelting production high-speed steel process
CN109136501A (en) * 2018-10-16 2019-01-04 燕山大学 A kind of preparation method of middle low-carbon ledeburite steel

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201195737Y (en) * 2008-04-17 2009-02-18 东北大学 Apparatus for balance pressurization of gas and cooling water pressure in electroslag furnace
CN201195738Y (en) * 2008-04-17 2009-02-18 东北大学 Pressurization electroslag furnace
CN102002599A (en) * 2010-11-15 2011-04-06 成都天马铁路轴承有限公司 Vacuum argon-filling pressurizing electroslag remelting method
CN204111842U (en) * 2014-10-11 2015-01-21 河北钢铁股份有限公司 A kind of pressurization electroslag remelting furnace
CN105925916A (en) * 2016-06-24 2016-09-07 东北大学 Method for calcium and aluminum nitrogen increase and deoxygenation in pressurized electroslag remelting process of high-nitrogen steel
CN106011371A (en) * 2016-06-24 2016-10-12 东北大学 Pressurizing induction and pressurizing electroslag remelting duplex high-nitrogen steel smelting method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201195737Y (en) * 2008-04-17 2009-02-18 东北大学 Apparatus for balance pressurization of gas and cooling water pressure in electroslag furnace
CN201195738Y (en) * 2008-04-17 2009-02-18 东北大学 Pressurization electroslag furnace
CN102002599A (en) * 2010-11-15 2011-04-06 成都天马铁路轴承有限公司 Vacuum argon-filling pressurizing electroslag remelting method
CN204111842U (en) * 2014-10-11 2015-01-21 河北钢铁股份有限公司 A kind of pressurization electroslag remelting furnace
CN105925916A (en) * 2016-06-24 2016-09-07 东北大学 Method for calcium and aluminum nitrogen increase and deoxygenation in pressurized electroslag remelting process of high-nitrogen steel
CN106011371A (en) * 2016-06-24 2016-10-12 东北大学 Pressurizing induction and pressurizing electroslag remelting duplex high-nitrogen steel smelting method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
朱红春: "加压技术在高品质特殊钢冶炼和凝固中的作用", 《钢铁》 *
董建新: "《高温合金GH4738及应用》", 30 November 2014, 冶金工业出版社 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107576679A (en) * 2017-08-31 2018-01-12 辽宁科技大学 A kind of method for the ESR ingot Local cooling speed for demarcating electroslag remelting production high-speed steel process
CN107576679B (en) * 2017-08-31 2020-05-19 辽宁科技大学 Method for calibrating local cooling speed of electroslag ingot in process of producing high-speed steel through electroslag remelting
CN109136501A (en) * 2018-10-16 2019-01-04 燕山大学 A kind of preparation method of middle low-carbon ledeburite steel

Similar Documents

Publication Publication Date Title
CN106947908B (en) A kind of method of continuous casting electroslag production 4Cr5MoSiV1 die steels
CN101787492B (en) Manufacturing method of high quality and large size mandril blank
CN101338391B (en) Quick setting block aluminum alloy with high strength and high ductibility and toughness and method for preparing same
CN110230009B (en) Hot work die steel with good cutting performance and preparation method thereof
CN103334061A (en) Die-casting die steel with high heat conductivity and large section and preparation and heat treatment method thereof
CN104561730A (en) Method for producing GCr15 bearing steel billets
CN110453106A (en) It is a kind of it is antivacuum under draw the production technology of continuous casting copper-iron alloy slab ingot
CN103882254A (en) Aluminium bronze continuously-cast tube with both high strength and high ductility, and production method thereof
CN110042273B (en) High-strength high-conductivity copper alloy pipe and preparation method thereof
CN102925783A (en) Method for preparing hypereutectic high chromium white cast iron
CN103757545B (en) Rolling mill guiding high temperature wear resistant alloy material and rolling mill guiding heat treating method
CN109913702A (en) A kind of preparation process of the nickel base superalloy with high-content refractory element
CN106834730A (en) A kind of method that electroslag remelting technique that pressurizes smelts high-quality high-speed steel
CN106191637A (en) A kind of casting method of anticorrosion wear-resisting low chrome material
CN103526038B (en) A kind of high-strength high-plasticity TWIP steel esr production method
CN106011671B (en) A kind of production method of H13 continuous casting square billets
CN106566946A (en) Rare earth-copper alloy glass mold and preparation method thereof
CN109112418B (en) Continuous casting method of high manganese steel
CN111945053B (en) Method for preparing high-speed steel roller by composite modification treatment
CN107974632A (en) A kind of Austenitic Hot Work Die Steel and preparation method thereof
CN101157119A (en) Apparatus for preparing easy-oxidizing hard-distortion alloy wire staff
CN105861935B (en) Excellent Fe 36Ni invar alloy materials of a kind of thermoplasticity and preparation method thereof
CN110218935B (en) Hot-work die steel with three-dimensional isotropic performance and preparation method thereof
CN107541591A (en) A kind of manufacture method of super electromagnetic pure iron DT4C bars
CN107586980B (en) A kind of multielement rare earth alloying high-conductivity copper alloy and preparation method thereof

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: 20170613