CN108265223A - Carbon constructional quality steel material and its production technology - Google Patents
Carbon constructional quality steel material and its production technology Download PDFInfo
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/076—Use of slags or fluxes as treating agents
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
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- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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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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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
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- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
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Abstract
The invention discloses a kind of carbon constructional quality steel material and its production technologies.The carbon constructional quality steel material is made of following element：C：0.58‑0.61%；Si：0.22‑0.27%；Mn：0.83‑0.86%；P：≤0.025%；S：≤0.020%；Cr≤0.09%；Al：0.005‑0.030%；Cu：≤0.025%；B：0.002‑0.003%；Ti：0.009‑0.015；Nb：0.015‑0.019；Surplus is Fe.Beneficial effects of the present invention are：The carbon constructional quality steel material has higher intensity and hardness.
Description
Technical field
The present invention relates to carbon structure Steel material, more particularly to a kind of carbon constructional quality steel material and its production technology.
Background technology
Carbon constructional quality steel be it is carbon containing be less than 0.8% carbon steel, contained sulphur, phosphorus and non-metallic inclusion are less,
Mechanical performance is more excellent.
The Chinese patent of Publication No. CN102041444A discloses a kind of low carbon low silicon carbon constructional quality steel and its life
Production method.The chemical composition of the carbon constructional quality steel is (unit：Wt%)：C：≤ 0.06, Si：≤ 0.03, Mn：0.35-
0.50, P：≤ 0.018, S≤0.012, Als：0.005-0.025, other are Fe and relict element.
The carbon content and manganese content of the carbon constructional quality steel are relatively low, cause intensity and hardness relatively low, have much room for improvement.
Invention content
The object of the present invention is to provide a kind of carbon constructional quality steel materials.The carbon constructional quality steel material has higher
Intensity and hardness.
The present invention above-mentioned technical purpose technical scheme is that：
A kind of carbon constructional quality steel material, is made of following element：C：0.58-0.64%；Si：0.20-0.30%；Mn：
0.80-0.90%；P：≤ 0.030%；S：≤ 0.030%；Cr≤0.25%；Al：0.005-0.030%；Cu：≤ 0.20%；
B：0.002-0.003%；Ti：0.009-0.015；Nb：0.015-0.019；Surplus is Fe.
By using above-mentioned technical proposal, carbon element content is higher, can improve the intensity and hardness of steel, but can lead
Plasticity and toughness is caused to decline；Element silicon can crystal grain thinning, spread uniform, improve the intensity of steel, do not influence plasticity and toughness.
The content of manganese element is higher, can improve the intensity and hardness of steel, reduces the brittleness of steel；Aluminium can crystal grain thinning, improve
The toughness of steel improves antioxygenic property；Boron element can prevent the segregation of phosphorus, sulphur, inhibit embrittlement of grain boundaries, so as to be conducive to change
The toughness of kind steel；Titanium elements and niobium element can notable crystal grain thinning, improve the institutional framework of steel, make inclusion modification,
Reduce banded structure in steel.
Another goal of the invention of the present invention is to provide a kind of production technology of above-mentioned carbon constructional quality steel material, including such as
Lower step：Converter melting, the refining of LF stoves, conticaster cast, hot rolling, slow cooling；
In the converter melting step and LF stove refinement steps, slag former is added in；
The slag former is made of the component of following parts by weight of primary raw material：
30-40 parts of iron oxide
15-20 parts of aluminium oxide
10-15 parts of manganese oxide
3-6 parts of calcium oxide
2-4 parts of magnesia
L-5 parts of boron oxide
0.1-l parts of titanium oxide
L-3 parts of binding agent.
By using above-mentioned technical proposal, the addition of iron oxide, aluminium oxide, boron oxide, titanium oxide can reduce calcium oxide
Fusing point, promote calcium oxide melt, reduce cinder viscosity, so as to reduce the fusing point of clinker, improve and keep the stream of clinker
Dynamic property, can finally promote slugging ability, accelerate slugging speed, promote dephosphorization and desulfurization effect, promote operating characteristics, avoiding
There is smelting index more better than addition fluorite in the case of using fluorite.Manganese oxide is cosolvent, and calcium oxide is promoted to melt.Oxygen
Change magnesium to add in as slag adjusting agent, improve content of magnesia in slag.Binding agent can be bonded other components, be convenient for adding
Work and storage.
The present invention is further arranged to：The binding agent includes organic binder bond and inorganic binder, the organic adhesive
The mixed weight of agent and inorganic binder ratio is 1: 3-5.
By using above-mentioned technical proposal, organic binder bond and inorganic binder are used cooperatively, can significantly be dropped
Low inorganic bond dosage reduces production cost.
The present invention is further arranged to：The organic binder bond includes polyacrylamide and polyvinyl alcohol, the polypropylene
The mixed weight of amide and polyvinyl alcohol ratio is 2-3: 1.
The present invention is further arranged to：The inorganic binder is bentonite.
The present invention is further arranged to：According to parts by weight, 1-5 parts of lithia is further included.
By using above-mentioned technical proposal, the addition of lithia can be common with iron oxide, aluminium oxide, boron oxide, iron oxide
Same-action promotes slugging ability, accelerates slugging speed.
The present invention is further arranged to：The preparation method of the slag former includes the following steps：
Step 1：Polyacrylamide and polyvinyl alcohol are each configured to the aqueous solution of identical mass fraction, by polyacrylamide aqueous amine
Solution and POLYPROPYLENE GLYCOL aqueous solution are configured to organic binder bond aqueous solution according to mixed weight ratio for 1: 3-5；Step 2：It will be organic
Adhesive solution and bentonite are configured to binding agent according to organic binder bond and bentonitic mixed weight ratio for 1: 3-5；
Step 3：According to parts by weight, 30-40 parts of iron oxide, 15-20 parts of aluminium oxide, 10-15 parts of manganese oxide, calcium oxide 3-6 are weighed
Part, 2-4 parts of magnesia, 1-5 parts of boron oxide, 0.1-1 parts of titanium oxide, 1-3 parts of binding agent are simultaneously uniformly mixed；
Step 4：Compression moulding, drying at room temperature obtain slag ball；
Step 5：Slag ball take out after calcination processing is less than 0.2wt% to moisture, after cooling.
By using above-mentioned technical proposal, when being removed water, due between hydrone and polyacrylamide and polyvinyl alcohol
Stronger hydrogen bond action is formed, evaporation rate is slower.Due to the slow evaporation of hydrone, hydrone drives particle further to lean on
Hold together, polyacrylamide and polyvinyl alcohol increase in the distribution density of particle surface, enhance intergranular binding force.It therefore, will be poly-
Acrylamide and POLYPROPYLENE GLYCOL are made into aqueous solution addition, then carry out drying at room temperature and calcination processing is removed water, and are made so as to be promoted
The intensity of slag agent.
The present invention is further arranged to：The mass fraction of the polyacrylamide and polyvinyl alcohol water solution be 3-5%, institute
Calcination temperature is stated as 800-900K, time 30-40min.
By using above-mentioned technical proposal, make polyacrylamide and polyvinyl alcohol dosage appropriate, both avoided the very little shadow of dosage
Intensity is rung, and dosage is avoided to cause to cause negative interaction too much.Control calcination temperature and the time it is appropriate, both avoided temperature excessively high and when
Between it is long, increase production cost, also avoid that temperature is too low and the time is too short, cause water removal effect poor.
The present invention is further arranged to：In the converter melting step, steel scrap, converter alloy, deoxidation are added in into molten iron
The proportion of agent aluminium cake, the steel scrap and molten iron is 1: 10, and the converter alloy includes ferrosilicon, silicomanganese, low nitrogen carbon dust, ferro-boron, titanium
The ratio of iron, ferro-niobium, the ferrosilicon and molten iron is 1: 20kg/t, and the ratio of the silicomanganese and molten iron is 1: 1kg/t, the low nitrogen
The ratio of carbon dust and molten iron is 1: 5kg/t, the ferro-boron, ferrotianium, ferro-niobium and molten iron weight ratio be 1: 1625；The aluminium cake
Dosage and the weight ratio of mixture are 1.1kg/t, and wherein mixture includes molten iron, steel scrap and converter alloy, the converter alloy
Low nitrogen carbon dust, aluminium cake, silicomanganese and ferrosilicon, ferro-boron, ferrotianium and ferro-niobium, the converter melting step are followed successively by with the addition sequence of aluminium cake
Offering oxygen way is top blast in rapid.
By using above-mentioned technical proposal, the addition of steel scrap can reduce cost, improve resource utilization, be carried out at the same time drop
Temperature.On the one hand the addition of converter alloy can be reacted with oxygen, achieve the purpose that deoxidation, another aspect alloy can improve steel
Performance.Ferrosilicon can increase intensity and hardness；Silicomanganese can increase quenching degree, improve toughness, reduce the harm of sulphur；Low nitrogen carbon dust
The features such as inoxidizability is strong, low ash, low-sulfur, low-phosphorous, high mechanical properties, high chemism, high clean coal recovery, can be used to adjust
The carbon content and oxygen content of molten steel, change its rigidity and toughness, so as to improve the inherent quality of the nucleation ability of molten steel and steel billet；
The system that is incorporated as of ferro-boron introduces boron element, and boron element can prevent the segregation of phosphorus, sulphur, inhibit embrittlement of grain boundaries, so as to be conducive to
Improve the toughness of steel；The system that is incorporated as of ferrotianium and ferro-niobium introduces titanium elements and niobium element, titanium elements and niobium element and can show
Crystal grain thinning is write, improves the institutional framework of steel, makes inclusion modification, reduces banded structure in steel.The addition of aluminium cake can
Play the role of deoxidation.The oxygen of top blast can react generation carbon dioxide with carbon, for removing carbon impurity.
The present invention is further arranged to：In the LF stoves refinement step, LF stoves are added in the molten steel obtained toward converter step
Alloy and hello iron calcium line, the LF stoves alloy include ferrosilicon, silicomanganese, low nitrogen carbon dust, the steel that the ferrosilicon and converter step obtain
The ratio of water is 1: 20kg/t, and the ratio of molten steel that the silicomanganese and converter step obtain is 1: 1kg/t, the low nitrogen carbon dust and
The ratio for the molten steel that converter step obtains is 1: 5kg/t, and the length of the iron calcium line is 200m, wire-feeding velocity 4m/s.
By using above-mentioned technical proposal, ferrosilicon can increase intensity and hardness；Silicomanganese can increase quenching degree, improve it is tough
Property, reduce the harm of sulphur；Low nitrogen carbon dust inoxidizability is strong, low ash, low-sulfur, low-phosphorous, high mechanical properties, high chemism, high-precision
The features such as coal recovery, can be used to adjust the carbon content and oxygen content of molten steel, change its rigidity and toughness, so as to improve molten steel
The inherent quality of nucleation ability and steel billet.Iron calcium line, which can play good deoxidation dephosphorizing, improves steel performance, improves and closes
The recovery rate of gold.
In conclusion the invention has the advantages that：
1st, carbon content and manganese content are improved, increases the intensity and hardness of steel, while aluminium element, boron element, titanium elements and niobium member
The introducing of element improves the toughness of steel, and reducing carbon content increases the adverse effect caused by steel toughness；
2nd, the addition of iron oxide, aluminium oxide, boron oxide, titanium oxide and lithia promotes slugging ability, accelerates slugging speed, energy
It is enough that there is smelting index more better than addition fluorite in the case where avoiding using fluorite；
3rd, the addition of bentonite, polyacrylamide and polyvinyl alcohol promotes the intensity of carbon constructional quality steel slag former.
Specific embodiment
Embodiment 1-5 is used to illustrate the component of slag former and the preparation method of slag former.
The component of slag former is shown in Table 1 in embodiment 1-5.
The raw material components table of table 1, slag former
Note：Unit " part " refers to parts by weight；
Binding agent includes organic binder bond and inorganic binder, and organic binder bond includes polyacrylamide and polyvinyl alcohol.
The preparation method of slag former in embodiment 1 described further below, the preparation method of slag former is the same as real in embodiment 2-5
Apply example 1.The preparation method of slag former specifically comprises the following steps：
Step 1：Polyacrylamide and polyvinyl alcohol are each configured to the aqueous solution of identical mass fraction, by polyacrylamide aqueous amine
Solution and POLYPROPYLENE GLYCOL aqueous solution are configured to organic binder bond aqueous solution；
Step 2：Organic binder bond aqueous solution and inorganic binder are configured to binding agent；
Step 3：According to parts by weight, weigh iron oxide, aluminium oxide, manganese oxide, calcium oxide, magnesia, boron oxide, titanium oxide, glue
Knot agent simultaneously is uniformly mixed to obtain mixture；
Step 4：Mixture is put into the mold that internal diameter is 50mm, through ball press compression moulding under the pressure of 40KN, room temperature
Drying obtains slag ball for 24 hours；
Step 5：Slag ball take out after calcination processing is less than 0.2wt% to moisture, after cooling.
The preparation method parameter list of table 2, slag former
Strength test
1st, compressive strength test
Step 1：The slag former of embodiment 1 is subjected to intensity test in ADT204 type compressive strength testers；
Step 2：Step 1 is repeated 5 times, the compression strength that 5 intensity tests obtain is averaged as embodiment 1
The compression strength of slag former；
Step 3：The slag former of embodiment 1 is changed into the slag former of embodiment 2-5 successively, step 1 and 2 is repeated, obtains embodiment
The compression strength of the slag former of 2-5.
2nd, Falling strength is tested
Step 1：Repeat from 5m highly to fall to the slag former of embodiment 1 number when rupture, record rupture on ground；
Step 2：Step 1 is repeated 5 times, the number during rupture that will be obtained is averaged the slag former rupture as embodiment 1
Shi Suoxu whereabouts number；
Step 3：The slag former of embodiment 1 is changed into the slag former of embodiment 2-5 successively, step 1 and 2 is repeated, obtains embodiment
Required whereabouts number during the slag former rupture of 2-5.
Table 3, embodiment 1-5 slag formers compression strength and Falling strength record sheet
Note：Required whereabouts number is more during rupture, shows that Falling strength is stronger.
As known from Table 3, embodiment 1-5 is respectively provided with good compression strength and Falling strength.
It can be seen that the addition of bentonite, polyacrylamide and polyvinyl alcohol can enhance the intensity of slag former of the present invention.
Embodiment 6-10 is used for the production technology for illustrating carbon constructional quality steel.Wherein, the slag former used in embodiment 6
For the slag former prepared according to embodiment 1, the slag former used in embodiment 7 is the slag former prepared according to embodiment 2, is implemented
The slag former used in example 8 is the slag former prepared according to embodiment 3, and the slag former used in embodiment 9 is according to embodiment 4
The slag former of preparation, the slag former used in embodiment 10 is the slag former prepared according to embodiment 5.
The production technology of 6 carbon constructional quality steel of embodiment described further below, embodiment 7-10 is the same as embodiment 6.
A kind of production technology of carbon constructional quality steel material, includes the following steps：
Converter melting, the refining of LF stoves, conticaster cast, hot rolling, slow cooling.
In converter melting step, steel scrap, converter alloy, deoxidier aluminium cake are added in into molten iron.Wherein, the requirement of steel scrap
With reference to GB/T 4223-2004《Scrap iron and steel》, the weight ratio of steel scrap and molten iron is 1: 10.Converter alloy includes ferrosilicon, silicomanganese, low
Nitrogen carbon dust, ferro-boron, ferrotianium, ferro-niobium.The ratio of the ferrosilicon and molten iron is 1: 20kg/t, and the ratio of the silicomanganese and molten iron is 1:
The ratio of 1kg/t, the low nitrogen carbon dust and molten iron is 1: 5kg/t, ferro-boron, ferrotianium, ferro-niobium and molten iron weight ratio be 1: 1625.
The dosage of aluminium cake and the weight ratio of mixture are 1.1kg/t, and wherein mixture includes molten iron, steel scrap and converter alloy.Converter is closed
The addition sequence of gold and aluminium cake is followed successively by low nitrogen carbon dust, aluminium cake, silicomanganese and ferrosilicon, ferro-boron, ferrotianium and ferro-niobium.It is walked in converter melting
Offering oxygen way is top blast in rapid.
LF stoves alloy is added in LF stove refinement steps, in the molten steel obtained toward converter melting step and feeds iron calcium line.LF
Stove alloy includes ferrosilicon, silicomanganese, low nitrogen carbon dust, and the ratio of molten steel that the ferrosilicon and converter step obtain is 1: 20kg/t, institute
It states silicomanganese and the ratio of molten steel that converter step obtains is 1: 1kg/t, the molten steel that the low nitrogen carbon dust and converter step obtain
Ratio is 1: 5kg/t；Iron calcium line length is 200m, wire-feeding velocity 4m/s.
In converter melting step and LF stove refinement steps, slag former is added in, the total quantity of slag for controlling steel per ton is 10kg.
In course of hot rolling, first segment heating temperature is 755 DEG C, and second segment heating temperature is 1120 DEG C, third section heating temperature
It is 1250 DEG C to spend, and equal hot junction heating temperature is 1230 DEG C, and start rolling temperature is 1080 DEG C.
In annealing process, it is 585 DEG C to enter to cheat temperature, and the lift lid time is 38h, and the flip time is 48h.
The element of the carbon constructional quality steel material composition that production obtains is detected and recorded.
Table 4, the carbon constructional quality steel material element produced according to the production technology of embodiment 6-10 form table
Mechanical property test
With reference to GB/T 228.1-2010《Metal material stretching test part 1：Room temperature test method》To according to embodiment 6-10
Production technology production carbon constructional quality steel testing of materials its intensity.
With reference to GB/T 231-2012《Metal material Brinell hardness test》To the production technology production according to embodiment 6-10
Carbon constructional quality steel testing of materials its hardness.
With reference to GB/T 229-2007《Metal material Charpy pendulum impact test method》To the production according to embodiment 6-10
Its impact flexibility of the carbon constructional quality steel testing of materials of technique productions.
Table 5, the carbon constructional quality steel material mechanical performance test data sheet produced according to the production technology of embodiment 6-10
Table
As known from Table 5, carbon constructional quality steel material of the present invention yield strength, tensile strength, hardness and impact absorbing energy this
It is more excellent on four mechanical performance indexs.
Carbon content and manganese content are improved, increases the intensity and hardness of steel, while aluminium element, boron element, titanium elements and niobium
The introducing of element improves the toughness of steel, and reducing carbon content increases the adverse effect caused by steel toughness.
To playing slag time, dephosphorization rate, desulfurization degree and splash whether occur and return dry phenomenon this four in production process
Smelting index is monitored and records.
The smelting index record sheet of table 6, different slag formers
As known from Table 6, embodiment 1-5 rise the slag time it is less, show slag former of the present invention have good slugging ability and compared with
Fast slugging speed；The dephosphorization rate and desulfurization degree of embodiment 1-5 is higher, and surface slag former of the present invention has good dephosphorization and takes off
Sulphur effect；Embodiment 1-5 do not occur splash and return it is dry, show slag former of the present invention have good operating characteristics.Therefore, originally
Invention carbon constructional quality steel material producing process still has good smelting index in the case where avoiding using fluorite.
It can be seen that iron oxide, the addition of aluminium oxide, boron oxide, titanium oxide and lithia, can reduce the molten of calcium oxide
Point promotes calcium oxide to melt, and reduces cinder viscosity, so as to reduce the fusing point of clinker, improves and keep the mobility of clinker,
Slugging ability can be finally promoted, accelerates slugging speed, promotes dephosphorization and desulfurization effect, operating characteristics is promoted, is avoiding using
There is smelting index more better than addition fluorite in the case of fluorite.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, people in the art
Member can as needed make the present embodiment the modification of no creative contribution after this specification is read, but as long as at this
It is all protected in the right of invention by Patent Law.
Claims (10)
1. a kind of carbon constructional quality steel material, it is characterized in that：It is made of following element：C：0.58-0.61%；Si：0.22-
0.27%；Mn：0.83-0.86%；P：≤0.025%；S：≤0.020%；Cr≤0.09%；Al：0.005-0.030%；Cu：≤
0.025%；B：0.002-0.003%；Ti：0.009-0.015；Nb：0.015-0.019；Surplus is Fe.
2. a kind of production technology of carbon constructional quality steel material as described in claim 1, it is characterized in that：Including walking as follows
Suddenly：Converter melting, the refining of LF stoves, conticaster cast, hot rolling, slow cooling；
In the converter melting step and LF stove refinement steps, slag former is added in；
The slag former is made of the component of following parts by weight of primary raw material：
30-40 parts of iron oxide
15-20 parts of aluminium oxide
10-15 parts of manganese oxide
3-6 parts of calcium oxide
2-4 parts of magnesia
1-5 parts of boron oxide
0.1-1 parts of titanium oxide
1-3 parts of binding agent.
3. the production technology of carbon constructional quality steel material according to claim 2, it is characterized in that：The binding agent includes
The mixed weight ratio of organic binder bond and inorganic binder, the organic binder bond and inorganic binder is 1:3-5.
4. the production technology of carbon constructional quality steel material according to claim 2, it is characterized in that：The organic binder bond
Including polyacrylamide and polyvinyl alcohol, the mixed weight ratio of the polyacrylamide and polyvinyl alcohol is 2-3:1.
5. the production technology of carbon constructional quality steel material according to claim 2, it is characterized in that：The inorganic binder
For bentonite.
6. the production technology of carbon constructional quality steel material according to claim 2, it is characterized in that：According to parts by weight, go back
Including 1-5 parts of lithia.
7. the production technology of carbon constructional quality steel material according to claim 2, it is characterized in that：The system of the slag former
Preparation Method includes the following steps：
Step 1：Polyacrylamide and polyvinyl alcohol are each configured to the aqueous solution of identical mass fraction, by polyacrylamide aqueous amine
Solution and POLYPROPYLENE GLYCOL aqueous solution are 1 according to mixed weight ratio:3-5 is configured to organic binder bond aqueous solution；
Step 2：According to organic binder bond and bentonitic mixed weight ratio it is 1 by organic binder bond aqueous solution and bentonite:3-5
It is configured to binding agent；
Step 3：According to parts by weight, 30-40 parts of iron oxide, 15-20 parts of aluminium oxide, 10-15 parts of manganese oxide, calcium oxide 3-6 are weighed
Part, 2-4 parts of magnesia, 1-5 parts of boron oxide, 0.1-1 parts of titanium oxide, 1-3 parts of binding agent are simultaneously uniformly mixed；
Step 4：Compression moulding, drying at room temperature obtain slag ball；
Step 5：Slag ball take out after calcination processing is less than 0.2wt% to moisture, after cooling.
8. the production technology of carbon constructional quality steel material according to claim 2, it is characterized in that：The polyacrylamide
Mass fraction with polyvinyl alcohol water solution is 3-5%, and the calcination temperature is 800-900K, time 30-40min.
9. the production technology of carbon constructional quality steel material according to claim 2, it is characterized in that：The converter melting step
In rapid, steel scrap, converter alloy, deoxidier aluminium cake are added in into molten iron, the proportion of the steel scrap and molten iron is 1:10, the converter
Alloy includes ferrosilicon, silicomanganese, low nitrogen carbon dust, ferro-boron, ferrotianium, ferro-niobium, and the ratio of the ferrosilicon and molten iron is 1:20kg/t, it is described
The ratio of silicomanganese and molten iron is 1:The ratio of 1kg/t, the low nitrogen carbon dust and molten iron is 1:5kg/t, the ferro-boron, ferrotianium, niobium
The weight ratio of iron and molten iron is 1:1625；The dosage of the aluminium cake and the weight ratio of mixture are 1.1kg/t, wherein mixture packet
Include molten iron, steel scrap and converter alloy, the addition sequence of the converter alloy and aluminium cake be followed successively by low nitrogen carbon dust, aluminium cake, silicomanganese and
Ferrosilicon, ferro-boron, ferrotianium and ferro-niobium, offering oxygen way is top blast in the converter melting step.
10. the production technology of carbon constructional quality steel material according to claim 2, it is characterized in that：The LF stoves refining
LF stoves alloy is added in step, in the molten steel obtained toward converter step and feeds iron calcium line, the LF stoves alloy includes ferrosilicon, silicon
The ratio of molten steel that manganese, low nitrogen carbon dust, the ferrosilicon and converter step obtain is 1:20kg/t, the silicomanganese and converter step obtain
The ratio of the molten steel arrived is 1:The ratio of molten steel that 1kg/t, the low nitrogen carbon dust and converter step obtain is 1:5kg/t, it is described
The length of iron calcium line is 200m, wire-feeding velocity 4m/s.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111187994A (en) * | 2020-02-17 | 2020-05-22 | 本钢板材股份有限公司 | Steel C60 hot-rolled coil for high-C cutter and preparation method thereof |
| CN111530942A (en) * | 2020-05-15 | 2020-08-14 | 江苏联峰实业有限公司 | Hot rolling process of high-quality carbon structural steel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07150292A (en) * | 1993-10-07 | 1995-06-13 | Nkk Corp | Steel for machine structural use excellent in cold forgeability |
| CN101497968A (en) * | 2009-03-16 | 2009-08-05 | 江苏沙钢集团淮钢特钢有限公司 | Steel for microalloying lorry axle and technique for producing the same |
| CN101792889A (en) * | 2010-03-30 | 2010-08-04 | 莱芜钢铁集团有限公司 | Medium-carbon multi-alloying wear-resistant hot rolling round steel and production method thereof |
| CN102108472A (en) * | 2011-02-25 | 2011-06-29 | 武汉钢铁(集团)公司 | High-carbon microalloy round steel for fracture splitting connecting rod of automotive engine and production method thereof |
-
2018
- 2018-02-09 CN CN201810138863.3A patent/CN108265223B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07150292A (en) * | 1993-10-07 | 1995-06-13 | Nkk Corp | Steel for machine structural use excellent in cold forgeability |
| CN101497968A (en) * | 2009-03-16 | 2009-08-05 | 江苏沙钢集团淮钢特钢有限公司 | Steel for microalloying lorry axle and technique for producing the same |
| CN101792889A (en) * | 2010-03-30 | 2010-08-04 | 莱芜钢铁集团有限公司 | Medium-carbon multi-alloying wear-resistant hot rolling round steel and production method thereof |
| CN102108472A (en) * | 2011-02-25 | 2011-06-29 | 武汉钢铁(集团)公司 | High-carbon microalloy round steel for fracture splitting connecting rod of automotive engine and production method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111187994A (en) * | 2020-02-17 | 2020-05-22 | 本钢板材股份有限公司 | Steel C60 hot-rolled coil for high-C cutter and preparation method thereof |
| CN111530942A (en) * | 2020-05-15 | 2020-08-14 | 江苏联峰实业有限公司 | Hot rolling process of high-quality carbon structural steel |
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