CN110453057A - A kind of high-strength simple-cutting polish stick - Google Patents
A kind of high-strength simple-cutting polish stick Download PDFInfo
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- CN110453057A CN110453057A CN201910830313.2A CN201910830313A CN110453057A CN 110453057 A CN110453057 A CN 110453057A CN 201910830313 A CN201910830313 A CN 201910830313A CN 110453057 A CN110453057 A CN 110453057A
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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
- C21D1/26—Methods of annealing
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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
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
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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
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
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- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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Abstract
The invention discloses a kind of production methods of high-strength simple-cutting polish stick, including balling furnace is preheated to 450-550 DEG C；Polish stick embryo material merging balling furnace is heated to 600-650 DEG C, keeps the temperature 50-65min；Polish stick embryo material fast cooling is to being cooled to natural temperature after 50-100 DEG C；Polish stick embryo material is subjected to first time cold-drawn；Balling furnace is preheated to 600-650 DEG C；The thick embryo of polish stick is warming up to 850-900 DEG C, keeps the temperature 20-25min；The thick embryo of polish stick is cooled；The thick embryo of polish stick is subjected to second of cold-drawn；Carry out alkali cleaning；After heating furnace is preheated to 400-450 DEG C, the polish stick essence embryo after alkali cleaning is transferred in heating furnace, and (Ac3-60 DEG C)~Ac3 is warming up to the rate of heat addition of 40-50 DEG C/s and keeps the temperature 30-40min；K, polish stick essence embryo is produced into the cooling rate water-cooled cooling with 60-450 DEG C/s by heating furnace, until being cooled to room temperature；L, it after pickling processes and washes, then dries；M, the smart embryo of polish stick time is subjected to third time cold-drawn, cold-drawn obtains polish stick essence embryo after carrying out customized cut-off；N, antirust oil, finished product packing are smeared.
Description
Technical field
The invention belongs to polish stick technical field of producing, concretely relate to a kind of high-strength simple-cutting polishing
Stick.
Background technique
Polish stick it is widely used, usually occur with the identity for being processed raw material, so its need by mechanical plus
The manufacturing procedures such as work could obtain product after being processed, then machining carries out turning or milling by may require that,
In cutting process, it can extend cutter life, subtract Cutting free polish stick compared with the polish stick of non-Cutting free material
Few resistance to cutting, improves processed surface smoothness, is easy scrap fallaway.So how to obtain a kind of free machining polish stick is one
A technical issues that need to address.
Summary of the invention
The object of the present invention is to provide a kind of high-strength simple-cutting polish stick, it is intended to obtain a kind of high-strength simple-cutting
Polish stick solves polish stick tool wear present in cutting process, the low problem of converted products surface smoothness.
In order to solve the above technical problems, the object of the present invention is achieved like this:
A kind of production method of high-strength simple-cutting polish stick, it is characterised in that: following including being carried out to polish stick embryo material
Step obtains high-strength simple-cutting polish stick
A, balling furnace is preheated to 450-550 DEG C；
B, polish stick embryo material is placed in balling furnace and is heated to 600-650 DEG C with the rate of 50 DEG C/s, kept the temperature 50-65min, add
Nitrogen is filled with while hot into balling furnace；
C, balling furnace is closed, the water circulation cooling system of balling furnace is opened, polish stick embryo material is with furnace according to 35-45 DEG C/S
Rate fast cooling to after 50-100 DEG C, the taking-up of polish stick embryo material is cooled to natural temperature；
D, polish stick embryo material is subjected to first time cold-drawn, the thick embryo of polish stick is obtained after cold-drawn；
E, balling furnace is preheated to 600-650 DEG C；
F, the thick embryo of polish stick is placed in balling furnace, nodularization stove evacuation is first then charged with hydrogen and nitrogen mixes
Gas is rapidly heated according to the rate of heat addition of 80 DEG C/s to 850-900 DEG C, keeps the temperature 20-25min；
G, the thick embryo of polish stick is produced by balling furnace, is put into cooling oil and cools down, temperature is reduced to 30-50
Cooling terminates after DEG C；
H, the thick embryo of polish stick is subjected to second of cold-drawn, the smart embryo of polish stick time is obtained after cold-drawn；
I, alkali cleaning is carried out, alkali cleaning temperature is 60-70 DEG C；
J, after heating furnace being preheated to 400-450 DEG C, the polish stick essence embryo after alkali cleaning is transferred in heating furnace, and with 40-
The rate of heat addition of 50 DEG C/s is warming up to (Ac3-60 DEG C)~Ac3 and keeps the temperature 30-40min；
K, polish stick essence embryo is produced into the cooling rate water-cooled cooling with 60-450 DEG C/s by heating furnace, until being cooled to room
Temperature；
L, it after pickling processes and washes, then dries；
M, the smart embryo of polish stick time is subjected to third time cold-drawn, cold-drawn obtains polish stick essence embryo after carrying out customized cut-off；
N, antirust oil, finished product packing are smeared.
Preferred embodiment on the basis of above scheme and as above scheme: the nitrogen in the step B in nodularization is dense
Spending volume fraction is 80%.
Preferred embodiment on the basis of above scheme and as above scheme: nitrogen is all in balling furnace in the step F
Gas and hydrogen, the gas volume fractions that the gas of the hydrogen accounts for nitrogen are 2-8%.
Preferred embodiment on the basis of above scheme and as above scheme: the lye in the step I is hydroxide
Sodium solution, the mass percent of sodium hydroxide is 10-20% in the sodium hydroxide solution.
Preferred embodiment on the basis of above scheme and as above scheme: third time cold-drawn stretches in the step M
Long rate is 6.5-10%.
The present invention is prominent compared with prior art and beneficial having the technical effect that can be obtained by the present processes it is high-strength
Free machining polish stick is spent, to reduce the resistance to cutting in machining process while guaranteeing polish stick intensity, improves and adds
Work surface smoothness is easy scrap fallaway, to extend cutting-tool's used life, reduces mach cost, improves product matter
Amount.
Specific embodiment
To keep the purposes, technical schemes and advantages of the application clearer, below in conjunction with embodiment, to technical solution into
Row clearly and completely describes,
This application discloses a kind of high-strength simple-cutting polish sticks, exist in cutting process to solve polish stick
Tool wear, the low problem of converted products surface smoothness, it is done below with reference to embodiment be described in detail:
Embodiment one
A kind of high-strength simple-cutting polish stick, chemical component composition and its mass percentage are as follows: C:0.40~
0.43%, Mn:0.55~0.73%, Si:0.20~0.35%, 0.043% < S < 0.06%, P≤0.025%, bismuth:
0.035%~0.045%, zirconium: 0.025%~0.030%, Al:0.02%~0.028%, remaining is for iron and inevitably
Impurity；With increasing for sulfur content, the cutting ability of steel is also better, but for ordinary steel, and micro increasing sulphur, which can play, to be changed
The positive effect of kind machinability；Sulphur appropriate (especially in sulphur lower than 0.1% or less) is added, to the effect for improving steel machinability
Fruit is all very significant.Its effect is mainly manifested in: not only reducing cutting force and cutting temperature, hence it is evident that cutter life is improved,
But also the surface roughness of workpiece is reduced, improve chip treatability.Sulphur is mainly in the form of (Mn, Fe) S there are in steel in steel,
Due to MnS field trash cut off matrix continuity and stress raiser effect and make vehicle bits it is easily broken, lubricating action makes cutter
Abrasion reduces, so as to improve the cutting ability of steel.In order to make steel that there is better cutting ability, the MnS in steel should be made
With certain length-width ratio (L/W), and research shows that field trash glomeration and fusiform are more advantageous to cutting than linear, because
This, it is desirable to the MnS in steel is at fusiform or approximate sphericity.However MnS is extended along rolling direction in the hot rolling, keeps sulphur easy
The horizontal mechanical performance of Cutting Steel is substantially reduced, and exacerbates the anisotropy of steel.By into automatic steel be added tellurium, calcium,
The elements such as zirconium, rare earth and titanium are allowed to generate sulfide with the sulphur in steel, and these field trash high-temp plastic poor processabilities, In
Extension when calendering becomes difficult, and the anisotropy of intensity is also suppressed, to achieve the purpose that change sulphide shape.Together
When, should ensure that in steel have certain manganese sulphur ratio, with reduce because in steel sulfur content it is excessively high due to bring adversely affect, to guarantee steel
Mechanical property, by the verifying of applicant, the machinability of polish stick when the content of sulphur is 0.043% < S < 0.06%
Most preferably, while intensity also can be good at controlling.Pass through the reasonable control and choosing of the content to C, Mn, Si, S, P, bismuth, zirconium simultaneously
It selects so that there is polish stick excellent intensity to be provided simultaneously with excellent cutting ability.
Further comprise the obtaining step of polish stick embryo material: it successively includes converter smelting, the refining of LF furnace, a RH furnace
Refining, continuous casting, obtains the step of polish stick embryo material at the production of VD furnace.
It is described that the slag making auxiliary materials such as lime, dolomite, fluorite are added in converter steelmaking process, silicon is added in tapping process
Iron, silicomanganese and aluminium silicomanganese carry out deoxidation alloying, the component of converter terminal molten steel are as follows: C0.20-0.25%, P0.010-
0.015%；Tapping temperature is 1610-1655 DEG C.
The LF furnace refining procedure, refines the temperature 1590- that offs normal by 1530-1542 DEG C of temperature in place of the refining of LF furnace
1636℃；Refining treatment time 32-60min.
The RH furnace refines vacuum degree≤133Pa, vacuum retention time >=15min.
The VD furnace production, molten steel are added silicon-calcium wire and carry out inclusion modification through VD furnace Fruit storage；
Continuous casting, for the degree of superheat between 20-35 DEG C, pulling rate obtains polish stick between 1.40m/min-1.50m/min
Thick embryo.
The production method of the high-strength simple-cutting polish stick are as follows: include the following steps
A, balling furnace is preheated to 450 DEG C.
B, polish stick embryo material is placed in balling furnace and is heated to 600 DEG C with the rate of 50 DEG C/s, keep the temperature 50-65min, heating
Nitrogen is filled with into balling furnace simultaneously.
C, balling furnace is closed, the water circulation cooling system of balling furnace is opened, polish stick embryo material is with furnace according to 35 DEG C/S's
The taking-up of polish stick embryo material is cooled to natural temperature to after 50 DEG C by rate fast cooling.
D, polish stick embryo material is subjected to first time cold-drawn, the thick embryo of polish stick is obtained after cold-drawn.
E, balling furnace is preheated to 600 DEG C.
F, the thick embryo of polish stick is placed in balling furnace, nodularization stove evacuation is first then charged with hydrogen and nitrogen mixes
Gas is rapidly heated according to the rate of heat addition of 80 DEG C/s to 850 DEG C, keeps the temperature 20min.
G, the thick embryo of polish stick is produced by balling furnace, is put into cooling oil and cools down, temperature is reduced to 30-50
Cooling terminates after DEG C.
H, the thick embryo of polish stick is subjected to second of cold-drawn, the smart embryo of polish stick time is obtained after cold-drawn.
I, alkali cleaning is carried out, alkali cleaning temperature is 60 DEG C.
J, after heating furnace being preheated to 400 DEG C, the polish stick essence embryo after alkali cleaning is transferred in heating furnace, and with 40 DEG C/s's
The rate of heat addition is warming up to (Ac3-60 DEG C)~Ac3 and keeps the temperature 30-40min.
K, polish stick essence embryo is produced into the cooling rate water-cooled cooling with 60 DEG C/s by heating furnace, until being cooled to room temperature.
L, it after pickling processes and washes, then dries.
M, the smart embryo of polish stick time is subjected to third time cold-drawn, cold-drawn obtains polish stick essence embryo after carrying out customized cut-off.
N, antirust oil, finished product packing are smeared.
It should be noted that the process of the cold-drawn in above-mentioned steps is to make polish stick embryo material, polishing by cold-drawn equipment
The thick embryo of stick, polish stick time smart embryo extend diameter simultaneously after the die hole of mold and reduce molding.
Nitrogen gas concn volume fraction in the step B in nodularization is 80%.
Nitrogen and hydrogen are all in the step F in balling furnace, the gas of the hydrogen accounts for the gas volume fractions of nitrogen
It is 2%.
Lye in the step I is sodium hydroxide solution, the quality percentage of sodium hydroxide in the sodium hydroxide solution
Than being 10%.
The elongation of third time cold-drawn is 6.5% in the step M.
There is excellent machinability by the polish stick that above-mentioned steps obtain, subtract while guaranteeing polish stick intensity
Lack the resistance to cutting in machining process, improve processed surface smoothness, be easy scrap fallaway, to extend the use longevity of cutter
Life reduces mach cost, improves product quality.
Embodiment two
A kind of high-strength simple-cutting polish stick, chemical component composition and its mass percentage are as follows: C:0.40~
0.43%, Mn:0.55~0.73%, Si:0.20~0.35%, 0.043% < S < 0.06%, P≤0.025%, bismuth:
0.035%~0.045%, zirconium: 0.025%~0.030%, Al:0.02%~0.028%, remaining is for iron and inevitably
Impurity；With increasing for sulfur content, the cutting ability of steel is also better, but for ordinary steel, and micro increasing sulphur, which can play, to be changed
The positive effect of kind machinability；Sulphur appropriate (especially in sulphur lower than 0.1% or less) is added, to the effect for improving steel machinability
Fruit is all very significant.Its effect is mainly manifested in: not only reducing cutting force and cutting temperature, hence it is evident that cutter life is improved,
But also the surface roughness of workpiece is reduced, improve chip treatability.Sulphur is mainly in the form of (Mn, Fe) S there are in steel in steel,
Due to MnS field trash cut off matrix continuity and stress raiser effect and make vehicle bits it is easily broken, lubricating action makes cutter
Abrasion reduces, so as to improve the cutting ability of steel.In order to make steel that there is better cutting ability, the MnS in steel should be made
With certain length-width ratio (L/W), and research shows that field trash glomeration and fusiform are more advantageous to cutting than linear, because
This, it is desirable to the MnS in steel is at fusiform or approximate sphericity.However MnS is extended along rolling direction in the hot rolling, keeps sulphur easy
The horizontal mechanical performance of Cutting Steel is substantially reduced, and exacerbates the anisotropy of steel.By into automatic steel be added tellurium, calcium,
The elements such as zirconium, rare earth and titanium are allowed to generate sulfide with the sulphur in steel, and these field trash high-temp plastic poor processabilities, In
Extension when calendering becomes difficult, and the anisotropy of intensity is also suppressed, to achieve the purpose that change sulphide shape.Together
When, should ensure that in steel have certain manganese sulphur ratio, with reduce because in steel sulfur content it is excessively high due to bring adversely affect, to guarantee steel
Mechanical property, by the verifying of applicant, the machinability of polish stick when the content of sulphur is 0.043% < S < 0.06%
Most preferably, while intensity also can be good at controlling.Pass through the reasonable control and choosing of the content to C, Mn, Si, S, P, bismuth, zirconium simultaneously
It selects so that there is polish stick excellent intensity to be provided simultaneously with excellent cutting ability.
Obtaining step including polish stick embryo material: it successively includes converter smelting, a LF furnace refining, the refining of RH furnace, VD
Furnace production, obtains the step of polish stick embryo material at continuous casting；
It is described that the slag making auxiliary materials such as lime, dolomite, fluorite are added in converter steelmaking process, silicon is added in tapping process
Iron, silicomanganese and aluminium silicomanganese carry out deoxidation alloying, the component of converter terminal molten steel are as follows: C0.20-0.25%, P0.010-
0.015%；Tapping temperature is 1610-1655 DEG C；
The LF furnace refining procedure, refines the temperature 1590- that offs normal by 1530-1542 DEG C of temperature in place of the refining of LF furnace
1636℃；Refining treatment time 32-60min；
The RH furnace refines vacuum degree≤133Pa, vacuum retention time >=15min；
The VD furnace production, molten steel are added silicon-calcium wire and carry out inclusion modification through VD furnace Fruit storage；
Continuous casting, for the degree of superheat between 20-35 DEG C, pulling rate obtains polish stick between 1.40m/min-1.50m/min
Thick embryo；
The production method of the high-strength simple-cutting polish stick are as follows: include the following steps
A, balling furnace is preheated to 500 DEG C；
B, polish stick embryo material is placed in balling furnace and is heated to 625 DEG C with the rate of 50 DEG C/s, keep the temperature 67.5min, heating
Nitrogen is filled with into balling furnace simultaneously；
C, balling furnace is closed, the water circulation cooling system of balling furnace is opened, polish stick embryo material is with furnace according to 40 DEG C/S's
The taking-up of polish stick embryo material is cooled to natural temperature to after 75 DEG C by rate fast cooling；
D, polish stick embryo material is subjected to first time cold-drawn, the thick embryo of polish stick is obtained after cold-drawn；
E, balling furnace is preheated to 625 DEG C；
F, the thick embryo of polish stick is placed in balling furnace, nodularization stove evacuation is first then charged with hydrogen and nitrogen mixes
Gas is rapidly heated according to the rate of heat addition of 80 DEG C/s to 875 DEG C, keeps the temperature 22.5min；
G, the thick embryo of polish stick is produced by balling furnace, is put into cooling oil and cools down, temperature is reduced to 40 DEG C
Cooling terminates afterwards；
H, the thick embryo of polish stick is subjected to second of cold-drawn, the smart embryo of polish stick time is obtained after cold-drawn；
I, alkali cleaning is carried out, alkali cleaning temperature is 65 DEG C；
J, after heating furnace being preheated to 400-450 DEG C, the polish stick essence embryo after alkali cleaning is transferred in heating furnace, and with 40-
The rate of heat addition of 50 DEG C/s is warming up to (Ac3-60 DEG C)~Ac3 and keeps the temperature 35min；
K, polish stick essence embryo is produced into the cooling rate water-cooled cooling with 250 DEG C/s by heating furnace, until being cooled to room temperature；
L, it after pickling processes and washes, then dries；
M, the smart embryo of polish stick time is subjected to third time cold-drawn, cold-drawn obtains polish stick essence embryo after carrying out customized cut-off；
N, antirust oil, finished product packing are smeared.
Nitrogen gas concn volume fraction in the step B in nodularization is 80%.
Nitrogen and hydrogen are all in the step F in balling furnace, the gas of the hydrogen accounts for the gas volume fractions of nitrogen
It is 5%.
Lye in the step I is sodium hydroxide solution, the quality percentage of sodium hydroxide in the sodium hydroxide solution
Than being 15%.
The elongation of third time cold-drawn is 8% in the step M.
There is excellent machinability by the polish stick that above-mentioned steps obtain, subtract while guaranteeing polish stick intensity
Lack the resistance to cutting in machining process, improve processed surface smoothness, be easy scrap fallaway, to extend the use longevity of cutter
Life reduces mach cost, improves product quality.
Embodiment three
A kind of high-strength simple-cutting polish stick, chemical component composition and its mass percentage are as follows: C:0.40~
0.43%, Mn:0.55~0.73%, Si:0.20~0.35%, 0.043% < S < 0.06%, P≤0.025%, bismuth:
0.035%~0.045%, zirconium: 0.025%~0.030%, Al:0.02%~0.028%, remaining is for iron and inevitably
Impurity；With increasing for sulfur content, the cutting ability of steel is also better, but for ordinary steel, and micro increasing sulphur, which can play, to be changed
The positive effect of kind machinability；Sulphur appropriate (especially in sulphur lower than 0.1% or less) is added, to the effect for improving steel machinability
Fruit is all very significant.Its effect is mainly manifested in: not only reducing cutting force and cutting temperature, hence it is evident that cutter life is improved,
But also the surface roughness of workpiece is reduced, improve chip treatability.Sulphur is mainly in the form of (Mn, Fe) S there are in steel in steel,
Due to MnS field trash cut off matrix continuity and stress raiser effect and make vehicle bits it is easily broken, lubricating action makes cutter
Abrasion reduces, so as to improve the cutting ability of steel.In order to make steel that there is better cutting ability, the MnS in steel should be made
With certain length-width ratio (L/W), and research shows that field trash glomeration and fusiform are more advantageous to cutting than linear, because
This, it is desirable to the MnS in steel is at fusiform or approximate sphericity.However MnS is extended along rolling direction in the hot rolling, keeps sulphur easy
The horizontal mechanical performance of Cutting Steel is substantially reduced, and exacerbates the anisotropy of steel.By into automatic steel be added tellurium, calcium,
The elements such as zirconium, rare earth and titanium are allowed to generate sulfide with the sulphur in steel, and these field trash high-temp plastic poor processabilities, In
Extension when calendering becomes difficult, and the anisotropy of intensity is also suppressed, to achieve the purpose that change sulphide shape.Together
When, should ensure that in steel have certain manganese sulphur ratio, with reduce because in steel sulfur content it is excessively high due to bring adversely affect, to guarantee steel
Mechanical property, by the verifying of applicant, the machinability of polish stick when the content of sulphur is 0.043% < S < 0.06%
Most preferably, while intensity also can be good at controlling.Pass through the reasonable control and choosing of the content to C, Mn, Si, S, P, bismuth, zirconium simultaneously
It selects so that there is polish stick excellent intensity to be provided simultaneously with excellent cutting ability.
Obtaining step including polish stick embryo material: it successively includes converter smelting, a LF furnace refining, the refining of RH furnace, VD
Furnace production, obtains the step of polish stick embryo material at continuous casting；
It is described that the slag making auxiliary materials such as lime, dolomite, fluorite are added in converter steelmaking process, silicon is added in tapping process
Iron, silicomanganese and aluminium silicomanganese carry out deoxidation alloying, the component of converter terminal molten steel are as follows: C0.20-0.25%, P0.010-
0.015%；Tapping temperature is 1610-1655 DEG C；
The LF furnace refining procedure, refines the temperature 1590- that offs normal by 1530-1542 DEG C of temperature in place of the refining of LF furnace
1636℃；Refining treatment time 32-60min；
The RH furnace refines vacuum degree≤133Pa, vacuum retention time >=15min；
The VD furnace production, molten steel are added silicon-calcium wire and carry out inclusion modification through VD furnace Fruit storage；
Continuous casting, for the degree of superheat between 20-35 DEG C, pulling rate obtains polish stick between 1.40m/min-1.50m/min
Thick embryo；
The production method of the high-strength simple-cutting polish stick are as follows: include the following steps
A, balling furnace is preheated to 550 DEG C；
B, polish stick embryo material is placed in balling furnace and is heated to 650 DEG C with the rate of 50 DEG C/s, keep the temperature 65min, heating it is same
When nitrogen is filled with into balling furnace；
C, balling furnace is closed, the water circulation cooling system of balling furnace is opened, polish stick embryo material is with furnace according to 45 DEG C/S's
The taking-up of polish stick embryo material is cooled to natural temperature to after 100 DEG C by rate fast cooling；
D, polish stick embryo material is subjected to first time cold-drawn, the thick embryo of polish stick is obtained after cold-drawn；
E, balling furnace is preheated to 650 DEG C；
F, the thick embryo of polish stick is placed in balling furnace, nodularization stove evacuation is first then charged with hydrogen and nitrogen mixes
Gas is rapidly heated according to the rate of heat addition of 80 DEG C/s to 900 DEG C, keeps the temperature 25min；
G, the thick embryo of polish stick is produced by balling furnace, is put into cooling oil and cools down, temperature is reduced to 30-50
Cooling terminates after DEG C；
H, the thick embryo of polish stick is subjected to second of cold-drawn, the smart embryo of polish stick time is obtained after cold-drawn；
I, alkali cleaning is carried out, alkali cleaning temperature is 70 DEG C；
J, after heating furnace being preheated to 450 DEG C, the polish stick essence embryo after alkali cleaning is transferred in heating furnace, and with 50 DEG C/s's
The rate of heat addition is warming up to (Ac3-60 DEG C)~Ac3 and keeps the temperature 30-40min；
K, polish stick essence embryo is produced into the cooling rate water-cooled cooling with 450 DEG C/s by heating furnace, until being cooled to room temperature；
L, it after pickling processes and washes, then dries；
M, the smart embryo of polish stick time is subjected to third time cold-drawn, cold-drawn obtains polish stick essence embryo after carrying out customized cut-off；
N, antirust oil, finished product packing are smeared.
Nitrogen gas concn volume fraction in the step B in nodularization is 80%.
Nitrogen and hydrogen are all in the step F in balling furnace, the gas of the hydrogen accounts for the gas volume fractions of nitrogen
It is 8%.
Lye in the step I is sodium hydroxide solution, the quality percentage of sodium hydroxide in the sodium hydroxide solution
Than being 20%.
The elongation of third time cold-drawn is 10% in the step M.
There is excellent machinability by the polish stick that above-mentioned steps obtain, subtract while guaranteeing polish stick intensity
Lack the resistance to cutting in machining process, improve processed surface smoothness, be easy scrap fallaway, to extend the use longevity of cutter
Life reduces mach cost, improves product quality.
Above-described embodiment is only presently preferred embodiments of the present invention, is not limited the scope of the invention according to this, therefore: it is all according to
The equivalence changes that structure of the invention, shape, principle are done, should all be covered by within protection scope of the present invention.
Claims (5)
1. a kind of production method of high-strength simple-cutting polish stick, it is characterised in that: including carrying out following step to polish stick embryo material
It is rapid to obtain high-strength simple-cutting polish stick
A, balling furnace is preheated to 450-550 DEG C；
B, polish stick embryo material is placed in balling furnace and is heated to 600-650 DEG C with the rate of 50 DEG C/s, keep the temperature 50-65min, heating
Nitrogen is filled with into balling furnace simultaneously；
C, balling furnace is closed, the water circulation cooling system of balling furnace is opened, polish stick embryo material is with furnace according to the speed of 35-45 DEG C/S
The taking-up of polish stick embryo material is cooled to natural temperature to after 50-100 DEG C by rate fast cooling；
D, polish stick embryo material is subjected to first time cold-drawn, the thick embryo of polish stick is obtained after cold-drawn；
E, balling furnace is preheated to 600-650 DEG C；
F, the thick embryo of polish stick is placed in balling furnace, nodularization stove evacuation is first then charged with hydrogen and nitrogen mixture, is pressed
It is rapidly heated according to the rate of heat addition of 80 DEG C/s to 850-900 DEG C, keeps the temperature 20-25min；
G, the thick embryo of polish stick is produced by balling furnace, is put into cooling oil and cools down, after temperature is reduced to 30-50 DEG C
Cooling terminates；
H, the thick embryo of polish stick is subjected to second of cold-drawn, the smart embryo of polish stick time is obtained after cold-drawn；
I, alkali cleaning is carried out, alkali cleaning temperature is 60-70 DEG C；
J, after heating furnace being preheated to 400-450 DEG C, the polish stick essence embryo after alkali cleaning is transferred in heating furnace, and with 40-50 DEG C/
The rate of heat addition of s is warming up to (Ac3-60 DEG C)~Ac3 and keeps the temperature 30-40min；
K, polish stick essence embryo is produced into the cooling rate water-cooled cooling with 60-450 DEG C/s by heating furnace, until being cooled to room temperature；
L, it after pickling processes and washes, then dries；
M, the smart embryo of polish stick time is subjected to third time cold-drawn, cold-drawn obtains polish stick essence embryo after carrying out customized cut-off；
N, antirust oil, finished product packing are smeared.
2. a kind of production method of high-strength simple-cutting polish stick according to claim 1, it is characterised in that: the step
Nitrogen gas concn volume fraction in B in nodularization is 80%.
3. a kind of production method of high-strength simple-cutting polish stick according to claim 1, it is characterised in that: the step
Nitrogen and hydrogen are all in F in balling furnace, the gas volume fractions that the gas of the hydrogen accounts for nitrogen are 2-8%.
4. a kind of production method of high-strength simple-cutting polish stick according to claim 1, it is characterised in that: the step
Lye in I is sodium hydroxide solution, and the mass percent of sodium hydroxide is 10-20% in the sodium hydroxide solution.
5. a kind of production method of high-strength simple-cutting polish stick according to claim 1, it is characterised in that: the step
The elongation of third time cold-drawn is 6.5-10% in M.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111495994A (en) * | 2020-04-27 | 2020-08-07 | 浙江丰原型钢科技有限公司 | Processing technology of high-strength corrosion-resistant square steel |
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Address after: 314000 8 Success Road, Huimin street, Jiashan County, Zhejiang, Jiaxing Applicant after: Zhejiang Jinchun Precision Industry Co.,Ltd. Address before: 314000 8 Success Road, Huimin street, Jiashan County, Zhejiang, Jiaxing Applicant before: Zhejiang Jinchun Precision Industry Co.,Ltd. |
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Application publication date: 20191115 |