CN108220770A - One kind plus boron high-carbon clean steel vacuum induction furnace smelting preparation method - Google Patents

One kind plus boron high-carbon clean steel vacuum induction furnace smelting preparation method Download PDF

Info

Publication number
CN108220770A
CN108220770A CN201711348432.1A CN201711348432A CN108220770A CN 108220770 A CN108220770 A CN 108220770A CN 201711348432 A CN201711348432 A CN 201711348432A CN 108220770 A CN108220770 A CN 108220770A
Authority
CN
China
Prior art keywords
steel
preparation
sources
induction furnace
vacuum induction
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.)
Granted
Application number
CN201711348432.1A
Other languages
Chinese (zh)
Other versions
CN108220770B (en
Inventor
潘孝定
罗俊义
王德洪
叶超
王璞
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.)
Advanced Technology and Materials Co Ltd
Original Assignee
Advanced Technology and Materials Co Ltd
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 Advanced Technology and Materials Co Ltd filed Critical Advanced Technology and Materials Co Ltd
Priority to CN201711348432.1A priority Critical patent/CN108220770B/en
Publication of CN108220770A publication Critical patent/CN108220770A/en
Application granted granted Critical
Publication of CN108220770B publication Critical patent/CN108220770B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/02Ferrous alloys, e.g. steel alloys containing silicon
    • 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
    • C22C33/06Making ferrous alloys by melting using master alloys
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/04Ferrous alloys, e.g. steel alloys containing manganese
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/24Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/32Ferrous alloys, e.g. steel alloys containing chromium with boron

Abstract

The invention belongs to special steel and its technical field of smelting, are related to a kind of plus boron high-carbon clean steel vacuum induction furnace smelting preparation method.By mass percentage, described plus boron high-carbon clean steel consists of the following compositions:C0.67~0.75%, Si 0.15~0.37%, Mn 0.30~0.80%, P≤0.012%, S≤0.006%, Cr 0.20~0.50%, Mo≤0.30%, V≤0.30%, B 0.002~0.100%, surplus are Fe and inevitable impurity;Preparation method includes the following steps:Vaccum sensitive stove smelting, smelting, continuous casting etc..The method of the present invention is greatly improved the mechanical performance of steel, and product tensile strength Rm >=1450MPa, yield strength R0.2 >=1350MPa, for plank used in sintered saw bits motherboard, generation plastic deformation damage is small, improves its service life, the steel production cost is low.

Description

One kind plus boron high-carbon clean steel vacuum induction furnace smelting preparation method
Technical field
The invention belongs to special steel and its technical field of smelting, are related to a kind of plus boron high-carbon clean steel vacuum induction furnace smelting system Preparation Method.
Background technology
At present, it when with steel plate sintered saw bits when planks, needs to be heated to certain temperature (750 DEG C of left sides in process It is right), use environment is severe, and material will bear to hale stretch and fatigue rupture.At present, the carbon steel steel plate such as used, then be sintered The plank gone out is also easy to produce plastic deformation, and service life is short;It is with high costs if using high-strength alloy steel plate.High-quality carbon structure Although steel 70# steel is suitable for the hot-working under high temperature (750 DEG C or so), harmful element, the content of field trash are equal in its ingredient It is higher, limited mechanical properties.
Therefore, it is necessary to develop a kind of high-carbon, microalloying, harmful element and inclusion content is low, product mechanical performance By force, the relatively low high intensity carbon clean steel of cost, applied to the hot-working under high temperature.
Invention content
The present invention provides a kind of plus boron high-carbon clean steel vacuum induction furnace smelting preparation method.
The present invention is achieved by the following technical solutions:
One kind plus boron high-carbon clean steel vacuum induction furnace smelting preparation method, by mass percentage, described plus boron high-carbon are pure Net steel consists of the following compositions:C 0.67~0.75%, Si 0.15~0.37%, Mn 0.30~0.80%, P≤0.012%, S≤0.006%, Cr 0.20~0.50%, Mo≤0.30%, V≤0.30%, B 0.002~0.100%, surplus is for Fe and not Evitable impurity;The preparation method includes the following steps:
Vacuum induction furnace smelting step:
Dispensing will first be smelted and melt processed is carried out in vaccum sensitive stove, then carry out refining treatment, then carry out at alloying Reason, then tap to obtain alloy molten steel;
Continuous casting processing step:
The alloy molten steel is subjected to direct casting processing, obtains described plus boron high-carbon clean steel.
As preferred embodiment, in the vacuum induction furnace smelting step, the raw materials for metallurgy is ingot iron, increases Carbon agent, Cr sources, Mo sources, V sources;Preferably, the dosage of the carburant is the 0.7-0.8% of the ingot iron quality.
As preferred embodiment, in the vacuum induction furnace smelting step, in the melt processed, vacuum degree≤ 20Pa, preferably 1-20Pa.
As preferred embodiment, in the vacuum induction furnace smelting step, when the refining treatment proceeds by Temperature is 1580-1600 DEG C.
As preferred embodiment, in the vacuum induction furnace smelting step, in the refining treatment, vacuum degree≤ 5Pa, preferably 1-5Pa, temperature are 1580-1640 DEG C, and the time is more than or equal to 40min, preferably 40-50min.
As preferred embodiment, in the vacuum induction furnace smelting step, the Alloying Treatment is in argon gas atmosphere Lower progress, it is preferable that the argon pressure is 4-6KPa;In the Alloying Treatment, add successively into the vaccum sensitive stove Enter Si sources, B sources, Mn sources;Preferably, the Si sources are B-Fe alloys, and the B sources are B-Fe alloys, and the Mn sources are electrolysis Mn.
As preferred embodiment, in the vacuum induction furnace smelting step, the temperature of the tapping is 1540-1560 ℃。
As preferred embodiment, the Cr sources are Cr simple substance, and the Mo sources are Mo simple substance, and the V sources are closed for V-Fe Gold.
As preferred embodiment, described plus boron high-carbon clean steel consists of the following compositions:C 0.67~0.75%, Si 0.15~0.3%, Mn 0.3~0.6%, P≤0.012%, S≤0.006%, Cr 0.25~0.40%, Mo 0.010- 0.025%, V 0.20-0.30%, B 0.002~0.01%, surplus are Fe and inevitable impurity.
As preferred embodiment, described plus boron high-carbon clean steel tensile strength Rm >=1450MPa, yield strength R0.2≥1350MPa。
Compared with prior art, the present invention has the advantages that:
1st, on the basis of the carbon constructional quality steel 70# steel for preparing of the present invention, hazardous elements S is further reduced, P, O, N contain It measures, reduction inclusion content, cleaning molten steel, is greatly improved the mechanical performance of steel.
2nd, product mechanical performance prepared by the present invention has than 70# steel, high-carbon clean steel 72A increases substantially, to logical It crosses the steel obtained after vacuum induction furnace smelting, continuous casting processing, forging, hot rolling, cold rolling and heat treatment and carries out performance detection, as a result It is as follows:Tensile strength Rm >=1450MPa;Yield strength R0.2 >=1350MPa, plank are used in sintered saw bits motherboard, generate modeling Property deformed damaged is small, improves its service life, in addition the steel production cost is low.
3rd, chemical composition rational proportion of the invention improves the quality of product jointly:The addition of Cr is effectively improved steel Obdurability;The addition of a small amount of V can effectively control the form of crystal grain and distribution in steel, improve the mechanical property, intensity and modeling of steel Property;The addition of B can improve quenching degree, can save a large amount of expensive alloying elements.
4th, the present invention is prepared using the vaccum sensitive stove that nobody uses in clean steel preparation field as capital equipment The excellent high intensity carbon clean steel of various aspects mechanical performance, obtained product stability is good, and qualification rate is high.In the prior art In, production cost in order to control, vaccum sensitive stove is mainly used in the experiment carried out in development phase, and is not applied to substantially In actual production.Vaccum sensitive stove is but applied in the production technology of high intensity carbon clean steel by the present invention, and prepared is pure The good quality of net steel product, the profit obtained by product can make up the defects of production cost is excessively high.
5th, the step of rational proportion of each ingredient of high intensity carbon clean steel of the invention, itself and preparation method, ginseng It acts synergistically between number, further improves its mechanical performance jointly.
Specific embodiment
With reference to specific embodiment, the present invention is further explained.It should be understood that these embodiments be only used for the present invention without For limiting the scope of the invention.Externally it should be understood that after present disclosure has been read, those skilled in the art are to this hair Bright to make various changes or modifications, these equivalent forms also fall within the scope of the appended claims of the present application.
The present invention provides the preparation method of above-mentioned plus boron high-carbon clean steel (i.e. high intensity carbon clean steel), this method be with Vaccum sensitive stove is the production technology of capital equipment, and product is prepared by raw materials such as feed stock for blast furnace ingot irons.The preparation side Method includes the following steps:
Step 1: dispensing:By ingot iron, carburant (C proportionings 0.7~0.8%, that is, after adding in carburant, in carburant C account for ingot iron mass percent be 0.7-0.8%), Cr items, Mo items, V-Fe alloys as smelt dispensing.
Step 2:Vacuum induction furnace smelting:
Above-mentioned smelting dispensing is sent into vaccum sensitive stove, under vacuum degree≤20Pa (preferably 1-20Pa), power transmission will Dispensing melts;
When molten steel temperature reaches 1580-1600 DEG C (such as 1582 DEG C, 1590 DEG C, 1595 DEG C, 1598 DEG C), vacuum degree≤ 5Pa (such as 4.5Pa, 4Pa, 3.5Pa, 3Pa, 2.5Pa, 2Pa, 1.5Pa, 1Pa, 0.5Pa, preferably 1-5Pa) starts to refine, essence Refine the time be more than or equal to 40min (such as:42min, 45min, 50min, 52min, 55min, 60min, preferably 40-50min), Refining temperature maintain 1580-1640 DEG C (such as 1582 DEG C, 1590 DEG C, 1595 DEG C, 1598 DEG C, 1600 DEG C, 1610 DEG C, 1620 DEG C, 1630 DEG C, 1635 DEG C), obtain refining liquid steel;
Refining terminate be filled with argon gas make furnace pressure reach 4-6KPa (such as 4.2KPa, 4.5KPa, 5KPa, 5.2KPa, 5.5KPa, 5.8KPa), then carry out Alloying Treatment:Si iron, B-Fe alloys, electrolysis Mn are sequentially added into stove;Work as molten steel Temperature is tapped when being down to 1540-1560 DEG C (such as 1545 DEG C, 1550 DEG C, 1555 DEG C, 1558 DEG C), obtains alloy molten steel.
Step 3: continuous casting processing:
Above-mentioned alloy molten steel is subjected to direct casting processing, obtains adding boron high-carbon clean steel strand;
The preparation method of the present invention can also include:Forging and milling step and heat treatment step, pair plus boron high-carbon it is pure Net steel steel billet is forged and rolling process, and finished steel is obtained after heat treatment, wherein forging and rolling mill practice and heat treatment Common process may be used, technique used in the embodiment of the present invention can also be used.
The high intensity carbon clean steel obtained by invention preparation method, by following mass percent into being grouped as:C 0.67~0.75%, Si 0.15~0.37%, Mn 0.30~0.80%, P≤0.012%, S≤0.006%, Cr 0.20~ 0.50%, Mo≤0.30%, V≤0.30%, B 0.002~0.100%, surplus are Fe and inevitable impurity.
Illustratively, the mass percent of above-mentioned C can be 0.67%, 0.68%, 0.70%, 0.72%, 0.75% in Arbitrary value or arbitrary range therebetween;The mass percent of above-mentioned Si can be 0.15%, 0.20%, 0.25%, 0.30%th, the arbitrary value in 0.35%, 0.37% or arbitrary range therebetween;The mass percent of above-mentioned Mn can be 0.30%th, the arbitrary value in 0.40%, 0.45%, 0.50%, 0.60%, 0.70%, 0.80% or arbitrary model therebetween It encloses;The mass percent of above-mentioned P can be 0.003%, 0.005%, 0.008%, 0.010%, 0.012% in arbitrary value or Arbitrarily therebetween range;The mass percent of above-mentioned S can be 0.002%, 0.003%, 0.004%, 0.005%, Arbitrary value or arbitrary range therebetween in 0.006%;The mass percent of above-mentioned Cr can be 0.20%, 0.25%, 0.30%th, the arbitrary value in 0.35%, 0.40%, 0.45%, 0.50% or arbitrary range therebetween;The quality of above-mentioned Mo Percentage can be arbitrary value in 0.05%, 0.08%, 0.1%, 0.2%, 0.25%, 0.3% or it is arbitrary therebetween Range;The mass percent of above-mentioned V can be 0.05%, 0.10%, 0.15%, 0.20%, 0.25%, 0.30% in it is arbitrary Value or arbitrary range therebetween;The mass percent of above-mentioned B can be 0.002%, 0.004, %0.005%, 0.01%, 0.02%th, the arbitrary value in 0.05%, 0.08%, 0.1% or arbitrary range therebetween.
Wherein, each component content is preferably:C 0.67~0.75%, Si 0.15~0.3%, Mn 0.3~0.6%, P≤ 0.012%, S≤0.006%, Cr 0.25~0.40%, Mo 0.010-0.025%, V 0.20-0.30%, B 0.002~ 0.01%.
Act synergistically between above-mentioned chemical composition proportioning, improve the quality of product jointly, in steel the effect of each component and The selection reason of each component content is as follows.
C:0.67~0.75%.Carbon is indispensable element in steel, and carbon had both expanded γ phase regions in steel, and carbon is high intensity Carbide component, invigoration effect of the carbon in steel is the ingredient for the carbide that it is formed and structure have it is close Relationship, phosphorus content increases in steel, yield point and tensile strength raising, but plasticity and impact reduce, and therefore, consider steel Performance, the C content of the application are selected as 0.67~0.75%.
Si:0.15~0.37%.In steelmaking process plus silicon is as reducing agent and deoxidier, silicon and the common alloying pair of molybdenum The high temperature oxidation resistance for improving steel has obvious effects on.
Mn:0.30~0.80%.In steelmaking process, manganese is good deoxidier and desulfurizing agent, and manganese is selected in the present invention Content can ensure that steel has enough toughness, and has higher intensity and hardness for 0.3-0.8%, improve the quenching property of steel, change The hot-working character of kind steel.
Mo:≤ 0.30%.Molybdenum is refractory metal, and fusing point is high (2625 DEG C).Molybdenum, which is dissolved into parent metal, can improve solid solution The recrystallization temperature of body.Molybdenum is the alloying element for reducing γ-Fe phase regions, expanding α-Fe phase regions, and is carbide. Alloy element of the molybdenum as steel can improve the intensity of steel, particularly elevated temperature strength and toughness;It improves the wearability of steel and changes Kind quenching degree, weldability and heat resistance.
Cr 0.20~0.50%.The addition of Cr can refine pearlite piece spacing and improve steel hardenability, so as to be effectively improved steel The obdurability of material;Chromium will be entered with certain proportion in cementite and ferritic phase during perlitic transformation, so as to improve strength character With change machinability.
V≤0.30%.The addition of a small amount of vanadium can effectively hinder growing up for austenite in steel, so as to fulfill the refinement of crystal grain; Vanadium can improve the nuclear driving force of cementite, and cementite crystal grain is different location is quick, independently forming core, so as to make cementite point Dissipate distribution;The addition of vanadium makes the thickness of crystal boundary cementite reduce and along crystal boundary dispersed distribution, and reduce austenite grain size, So as to improve the mechanical property of steel;Vanadium generates precipitation strength in steel, and pearlite piece interlamellar spacing is refined in high-carbon steel, improves The intensity and plasticity of steel.
B 0.002~0.100%, B improve the very competent of quenching degree;Only need minute quantity boron that can save a large amount of valuable Alloying element.
The properties of product of the present invention are compared with the prior art:
1st, in the prior art, there are 65#, 70#, 75#, 65Mn, 70Mn etc. close to steel grade with chemical composition of the present invention, chemistry Ingredient is shown in Table 1, and the details in table 1 derive from GB/T699-2015《Carbon constructional quality steel》.
Table 1:GB/T 699-2015 carbon constructional quality steels
The mechanical property of above structure steel is shown in Table 2.
Table 2:The mechanical property of carbon constructional quality steel (according to standard GB/T/T 699-2015)
3rd, compared to the steel grade of above-mentioned several trades mark, the mechanical performance of product of the invention is remarkably reinforced:Tensile strength Rm >= 1450MPa, yield strength R0.2 >=1350MPa, elongation are more than 6%;Its plank is used in sintered saw bits motherboard, generates plasticity and becomes Shape damage is small, improves its service life.
Embodiment 1
The present embodiment uses 25Kg vacuum induction furnace smeltings, pours into a mould 25Kg shell ingots.
The high intensity carbon clean steel of the present embodiment is by following mass percent into being grouped as:
C Mn Si P S Cr Mo V B
0.67 0.731 0.289 0.005 0.0006 0.328 0.001 0.18 0.0075
Surplus is Fe and inevitable impurity.
The preparation method of the present embodiment includes the following steps:
(1) dispensing:By ingot iron, carburant (C proportionings 0.7~0.8%), Cr items, Mo items, V-Fe alloys are as smelting Dispensing.
(2) vacuum induction furnace smelting:
A) it melts:Above-mentioned smelting dispensing is sent into vaccum sensitive stove, under vacuum degree 15Pa, power transmission melts dispensing;
B) it refines:When temperature reaches 1590 DEG C, during vacuum degree 3Pa, start to refine, refining time 45min, temperature exists 1620 DEG C, obtain refining liquid steel;
C) alloying:Refining end, which is filled with argon gas, makes furnace pressure reach 4-6KPa progress Alloying Treatments:I.e. into stove Sequentially add Si iron, B-Fe alloys, electrolysis Mn;It taps when molten steel temperature is down to 1550 DEG C, obtains alloy molten steel.
(3) continuous casting:Alloy molten steel is subjected to direct casting, obtains 25Kg shell ingots;
(4) it forges and rolls:Under the conditions of 900~1150 DEG C of forging temperature, above-mentioned 25Kg shells ingot is forged into thickness 30mm, width are the blank of 80mm, air-cooled to room temperature;Then hot rolling treatment is carried out, wherein hot rolling initial temperature is 1150 DEG C, is rolled Thick 4.0mm, the strip of wide 90mm, heat-preservation cotton heat preservation to room temperature is made;It is cold rolled to thick 1.5mm, the strip of wide 90mm again;830℃ Keep the temperature isothermal oil hardening in 2 hours.
The mechanical performance for the product that the present embodiment obtains is remarkably reinforced:Tensile strength Rm is 1487MPa, yield strength R0.2 For 1366MPa, elongation 8.2%.
Embodiment 2:
The present embodiment uses 25Kg vacuum induction furnace smeltings, pours into a mould 25Kg shell ingots.
The high intensity carbon clean steel of the present embodiment is by following mass percent into being grouped as:
C Mn Si P S Cr Mo V B
0.71 0.747 0.289 0.004 0.0004 0.341 0.001 0.13 0.0091
Surplus is Fe and inevitable impurity.
In the preparation method of the present embodiment, except step (1) and (2)-c) add in element dosage it is different in addition to, other operation It is same as Example 1 with parameter.
The mechanical performance for the product that the present embodiment obtains is remarkably reinforced:Tensile strength Rm is 1453MPa, yield strength R0.2 For 1404MPa, elongation 8.6%.
Embodiment 3:
The present embodiment uses 25Kg vacuum induction furnace smeltings, pours into a mould 25Kg shell ingots.
The high intensity carbon clean steel of the present embodiment is by following mass percent into being grouped as:
C Mn Si P S Cr Mo V B
0.69 0.755 0.295 0.005 0.0003 0.333 0.001 0.20 0.0126
Surplus is Fe and inevitable impurity.
In the preparation method of the present embodiment, except step (1) and (2)-c) add in element dosage it is different in addition to, other operation It is same as Example 1 with parameter.
The mechanical performance for the product that the present embodiment obtains is remarkably reinforced:Tensile strength Rm is 1470MPa, yield strength R0.2 For 1378MPa, elongation 8.6%.
Comparative example 1
The high intensity carbon clean steel of this comparative example is by following mass percent into being grouped as:
C Mn Si P S Cr Mo V B
0.67 0.731 0.289 0.005 0.0006 0.328 0.001 0.18 0
Surplus is Fe and inevitable impurity.
The step parameter of preparation method is in addition to step (2)-c) be added without BFe alloys other than, it is same as Example 1.
The mechanical performance for the belt steel product that the present embodiment obtains is:Tensile strength Rm is 1200MPa, and yield strength R0.2 is 1150MPa, elongation 10.5%, it can be seen that, the mechanical performance for not adding in the product of B element declines.
Comparative example 2
The high intensity carbon clean steel of this comparative example includes the ingredient of following mass percent:
C Mn Si P S Cr Mo V B
0.67 0.731 0.289 0.005 0.0006 0.328 0.001 0.18 0.3
Surplus is Fe and inevitable impurity.
The step parameter of preparation method is in addition to (2)-c) other than B-Fe alloy dosage increases, it is same as Example 1.
The mechanical performance for the band that the present embodiment obtains is:Tensile strength Rm is 1550MPa, and yield strength R0.2 is 1400MPa, elongation 1.5%.There is brittle failure, it can be seen that, B element amount ranges is controlled to close very much in the preparation of clean steel Key, if the too high levels of B, the mechanical performance of product declines.
Embodiment 4
The present embodiment uses 25Kg vacuum induction furnace smeltings, pours into a mould 25Kg shell ingots.
The high intensity carbon clean steel of the present embodiment is by following mass percent into being grouped as:
C Mn Si P S Cr Mo V B
0.75 0.30 0.15 0.012 0.006 0.50 0.001 0.30 0.010
Surplus is Fe and inevitable impurity.
The preparation method of the present embodiment includes the following steps:
(1) dispensing:By ingot iron, carburant (C proportionings 0.7~0.8%), Cr items, Mo items, V-Fe alloys are as smelting Dispensing.
(2) vacuum induction furnace smelting:
A) it melts:Above-mentioned smelting dispensing is sent into vaccum sensitive stove, under vacuum degree 5Pa, power transmission melts dispensing;
B) it refines:When temperature reaches 1580 DEG C, during vacuum degree 1Pa, start to refine, refining time 40min, temperature exists 1590 DEG C, obtain refining liquid steel;
C) alloying:Refining end, which is filled with argon gas, makes furnace pressure reach 4-6KPa progress Alloying Treatments:I.e. into stove Sequentially add Si iron, B-Fe alloys, electrolysis Mn;It taps when molten steel temperature is down to 1540 DEG C, obtains alloy molten steel.
(3) continuous casting:Alloy molten steel is subjected to direct casting, obtains 25Kg shell ingots.
(4) it forges and rolls:Under the conditions of 900~1150 DEG C of forging temperature, above-mentioned 25Kg shells ingot is forged into thickness 30mm, width are the blank of 80mm, air-cooled to room temperature;Then hot rolling treatment is carried out, wherein hot rolling initial temperature is 1150 DEG C, is rolled Thick 4.0mm, the strip of wide 90mm, heat-preservation cotton heat preservation to room temperature is made;It is cold rolled to thick 1.5mm, the strip of wide 90mm again;830℃ Keep the temperature isothermal oil hardening in 2 hours.
The mechanical performance for the product that the present embodiment obtains is remarkably reinforced:Tensile strength Rm is 1470MPa, yield strength R0.2 For 1360MPa, elongation 8.5%.
Embodiment 5
The present embodiment uses 25Kg vacuum induction furnace smeltings, pours into a mould 25Kg shell ingots.
The high intensity carbon clean steel of the present embodiment is by following mass percent into being grouped as:
C Mn Si P S Cr Mo V B
0.70 0.75 0.30 0.012 0.006 0.20 0.001 0.25 0.050
Surplus is Fe and inevitable impurity.
The preparation method of the present embodiment includes the following steps:
(1) dispensing:By ingot iron, carburant (C proportionings 0.7~0.8%), Cr items, Mo items, V-Fe alloys are as smelting Dispensing.
(2) vacuum induction furnace smelting:
A) it melts:Above-mentioned smelting dispensing is sent into vaccum sensitive stove, under vacuum degree 20Pa, power transmission melts dispensing;
B) it refines:When temperature reaches 1600 DEG C, during vacuum degree 5Pa, start to refine, refining time 50min, temperature exists 1640 DEG C, obtain refining liquid steel;
C) alloying:Refining end, which is filled with argon gas, makes furnace pressure reach 4-6KPa progress Alloying Treatments:I.e. into stove Sequentially add Si iron, B-Fe alloys, electrolysis Mn;It taps when molten steel temperature is down to 1560 DEG C, obtains alloy molten steel.
(3) continuous casting:Alloy molten steel is subjected to direct casting, obtains 25Kg shell ingots;
(4) it forges and rolls:Under the conditions of 900~1150 DEG C of forging temperature, above-mentioned 25Kg shells ingot is forged into thickness 30mm, width are the blank of 80mm, air-cooled to room temperature;Then hot rolling treatment is carried out, wherein hot rolling initial temperature is 1150 DEG C, is rolled Thick 4.0mm, the strip of wide 90mm, heat-preservation cotton heat preservation to room temperature is made;It is cold rolled to thick 1.5mm, the strip of wide 90mm again;830℃ Keep the temperature isothermal oil hardening in 2 hours.
The mechanical performance for the product that the present embodiment obtains is remarkably reinforced:Tensile strength Rm is 1480MPa, yield strength R0.2 For 1365MPa, elongation 7.8%.
Embodiment 6
The present embodiment uses 25Kg vacuum induction furnace smeltings, pours into a mould 25Kg shell ingots.
The high intensity carbon clean steel of the present embodiment is by following mass percent into being grouped as:
C Mn Si P S Cr Mo V B
0.72 0.80 0.37 0.012 0.006 0.30 0.001 0.10 0.030
Surplus is Fe and inevitable impurity.
The preparation method of the present embodiment includes the following steps:
(1) dispensing:By ingot iron, carburant (C proportionings 0.7~0.8%), Cr items, Mo items, V-Fe alloys are as smelting Dispensing.
(2) vacuum induction furnace smelting:
A) it melts:Above-mentioned smelting dispensing is sent into vaccum sensitive stove, under vacuum degree 10Pa, power transmission melts dispensing;
B) it refines:When temperature reaches 1585 DEG C, during vacuum degree 2Pa, start to refine, refining time 42min, temperature exists 1610 DEG C, obtain refining liquid steel;
C) alloying:Refining end, which is filled with argon gas, makes furnace pressure reach 4-6KPa progress Alloying Treatments:I.e. into stove Sequentially add Si iron, B-Fe alloys, electrolysis Mn;It taps when molten steel temperature is down to 1545 DEG C, obtains alloy molten steel.
(3) continuous casting:Alloy molten steel is subjected to direct casting, obtains 25Kg shell ingots;
(4) it forges and rolls:Under the conditions of 900~1150 DEG C of forging temperature, above-mentioned 25Kg shells ingot is forged into thickness 30mm, width are the blank of 80mm, air-cooled to room temperature;Then hot rolling treatment is carried out, wherein hot rolling initial temperature is 1150 DEG C, is rolled Thick 4.0mm, the strip of wide 90mm, heat-preservation cotton heat preservation to room temperature is made;It is cold rolled to thick 1.5mm, the strip of wide 90mm again;830℃ Keep the temperature isothermal oil hardening in 2 hours.
The mechanical performance for the product that the present embodiment obtains is remarkably reinforced:Tensile strength Rm is 1575MPa, yield strength R0.2 For 1372MPa, elongation 8.2%.

Claims (10)

1. one kind plus boron high-carbon clean steel vacuum induction furnace smelting preparation method, it is characterised in that:By mass percentage, it is described to add Boron high-carbon clean steel consists of the following compositions:C 0.67~0.75%, Si 0.15~0.37%, Mn 0.30~0.80%, P≤ 0.012%, S≤0.006%, Cr 0.20~0.50%, Mo≤0.30%, V≤0.30%, B 0.002~0.100%, surplus For Fe and inevitable impurity;
The preparation method includes the following steps:
Vacuum induction furnace smelting step:
Dispensing will first be smelted and melt processed is carried out in vaccum sensitive stove, then carry out refining treatment, then carry out Alloying Treatment, then Tapping obtains alloy molten steel;
Continuous casting processing step:
The alloy molten steel is subjected to direct casting processing, obtains described plus boron high-carbon clean steel.
2. preparation method according to claim 1, it is characterised in that:
In the vacuum induction furnace smelting step, the raw materials for metallurgy is ingot iron, carburant, Cr sources, Mo sources, V sources;
Preferably, the dosage of the carburant is the 0.7-0.8% of the ingot iron quality.
3. preparation method according to claim 1 or claim 2, it is characterised in that:
In the vacuum induction furnace smelting step, in the melt processed, vacuum degree≤20Pa, preferably 1-20Pa.
4. preparation method according to claim 1, it is characterised in that:In the vacuum induction furnace smelting step, the refining Temperature when processing proceeds by is 1580-1600 DEG C.
5. preparation method according to claim 1, it is characterised in that:In the vacuum induction furnace smelting step, the refining In processing, vacuum degree≤5Pa, preferably 1-5Pa, temperature are 1580-1640 DEG C, and the time is more than or equal to 40min, preferably 40-50min。
6. preparation method according to claim 1, it is characterised in that:
In the vacuum induction furnace smelting step, the Alloying Treatment carries out under an argon atmosphere, it is preferable that the Ar Pressure Power is 4-6KPa;In the Alloying Treatment, Si sources, B sources, Mn sources are sequentially added into the vaccum sensitive stove;Preferably, institute Si sources are stated as B-Fe alloys, the B sources are B-Fe alloys, and the Mn sources are electrolysis Mn.
7. preparation method according to claim 1, it is characterised in that:
In the vacuum induction furnace smelting step, the temperature of the tapping is 1540-1560 DEG C.
8. preparation method according to claim 2, it is characterised in that:The Cr sources are Cr simple substance, and the Mo sources are Mo simple substance, The V sources are V-Fe alloys.
9. according to any one of the claim 1-8 preparation methods, it is characterised in that:Described plus boron high-carbon clean steel by below into It is grouped as:C 0.67~0.75%, Si 0.15~0.3%, Mn 0.3~0.6%, P≤0.012%, S≤0.006%, Cr 0.25~0.40%, Mo 0.010-0.025%, V 0.20-0.30%, B 0.002~0.01%, surplus is Fe and can not keep away The impurity exempted from.
10. according to any one of the claim 1-9 preparation methods, it is characterised in that:Described plus boron high-carbon clean steel tension Intensity Rm >=1450MPa, yield strength R0.2 >=1350MPa.
CN201711348432.1A 2017-12-15 2017-12-15 Smelting preparation method of boron-added high-carbon pure steel in vacuum induction furnace Active CN108220770B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711348432.1A CN108220770B (en) 2017-12-15 2017-12-15 Smelting preparation method of boron-added high-carbon pure steel in vacuum induction furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711348432.1A CN108220770B (en) 2017-12-15 2017-12-15 Smelting preparation method of boron-added high-carbon pure steel in vacuum induction furnace

Publications (2)

Publication Number Publication Date
CN108220770A true CN108220770A (en) 2018-06-29
CN108220770B CN108220770B (en) 2020-06-23

Family

ID=62652262

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711348432.1A Active CN108220770B (en) 2017-12-15 2017-12-15 Smelting preparation method of boron-added high-carbon pure steel in vacuum induction furnace

Country Status (1)

Country Link
CN (1) CN108220770B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113215493A (en) * 2021-05-11 2021-08-06 北京理工大学 High-strength grenade steel and preparation method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1265430A (en) * 2000-02-29 2000-09-06 济南济钢设计院 Austenic-bainite Malleable steel and its preparation
JP2003301239A (en) * 2002-04-12 2003-10-24 Nippon Steel Corp Deformed wire for reinforcing optical fiber cable for land use
CN1536620A (en) * 2003-04-09 2004-10-13 友达光电股份有限公司 Low-temp. polycrystalline silicon film transistor and its polycrystalline silicon layer making method
CN103827337A (en) * 2011-09-30 2014-05-28 杰富意钢铁株式会社 Ingot for bearing and production process
CN104404355A (en) * 2014-11-19 2015-03-11 南京钢铁股份有限公司 Smelting process for anti-knock mild steel medium-thickness slab

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1265430A (en) * 2000-02-29 2000-09-06 济南济钢设计院 Austenic-bainite Malleable steel and its preparation
JP2003301239A (en) * 2002-04-12 2003-10-24 Nippon Steel Corp Deformed wire for reinforcing optical fiber cable for land use
CN1536620A (en) * 2003-04-09 2004-10-13 友达光电股份有限公司 Low-temp. polycrystalline silicon film transistor and its polycrystalline silicon layer making method
CN103827337A (en) * 2011-09-30 2014-05-28 杰富意钢铁株式会社 Ingot for bearing and production process
CN104404355A (en) * 2014-11-19 2015-03-11 南京钢铁股份有限公司 Smelting process for anti-knock mild steel medium-thickness slab

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
李志等: "《航空超高强度钢的发展》", 31 May 2012, 北京:国防工业出版社 *
米国发等: "铸钢车轮材料耐磨性实验研究", 《热加工工艺》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113215493A (en) * 2021-05-11 2021-08-06 北京理工大学 High-strength grenade steel and preparation method thereof

Also Published As

Publication number Publication date
CN108220770B (en) 2020-06-23

Similar Documents

Publication Publication Date Title
CN101768698B (en) Low cost yield strength 700MPA level non-tempering processing high strength steel plate and manufacturing method thereof
CN103215516A (en) 700MPa high strength hot rolling Q&P steel and manufacturing method thereof
CN100507059C (en) High-strength toughness steel for continuous sucker rod and method for manufacturing same
CN104357758A (en) Ultra-hard particle-enhanced martensitic wear-resistant steel plate and manufacturing method thereof
CN106939391A (en) A kind of Ca microalloyings easy-cutting high strength fractured connecting rod steel and manufacture method
WO2020098306A1 (en) Thick nm500 wear-resistant steel and production method therefor
CN104962834A (en) High-toughness stable-brinell-hardness extra-thick abrasion-resistant steel and preparation method thereof
CN102234743A (en) Low carbon martensite steel plate and production method
CN110438414A (en) A method of eliminating ultra-wide ferritic stainless steel surface crack of plate
CN105861939B (en) A kind of method for producing NM360 steel
CN105755373A (en) Method for producing steel NM400
CN106048412A (en) Transformation strengthened cold-machined high-strength steel, steel tube and manufacturing method thereof
CN110499474A (en) High temperature resistant 400HB wear-resisting steel plate and its production method
CN109594016A (en) A kind of Q690CF high strength steel plate and preparation method thereof containing rare earth
CN109609729A (en) A kind of yield strength 650MPa grades of stainless steel plates and manufacturing method
CN109694983B (en) High-mirror-surface corrosion-resistant plastic die steel and manufacturing method thereof
JP5668547B2 (en) Seamless steel pipe manufacturing method
CN107974639A (en) A kind of complex alloy wear-resistant steel ball of high tenacity and preparation method thereof
CN111334725A (en) Low-carbon ultrahigh-strength alloy chain steel wire rod and manufacturing method thereof
CN106967924A (en) Heavy-duty loader tire protection chain steel and its production method
CN109321829A (en) A kind of yield strength 900MPa grades of stainless steel plates and manufacturing method
CN110699597A (en) Hot work die steel and preparation method thereof
CN108220770A (en) One kind plus boron high-carbon clean steel vacuum induction furnace smelting preparation method
CN108660374A (en) A kind of quenching aligning short route wear-resisting steel plate and preparation method thereof
CN108277432A (en) A kind of cutlery martensite containing nitrogen stainless steel and its manufacturing method

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
GR01 Patent grant
GR01 Patent grant