CN108385031A - A kind of hot-rolled round steel for high carbon manganese and chrome grinding ball and its manufacturing method - Google Patents
A kind of hot-rolled round steel for high carbon manganese and chrome grinding ball and its manufacturing method Download PDFInfo
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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
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
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- C—CHEMISTRY; METALLURGY
- 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
- C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
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- C—CHEMISTRY; METALLURGY
- 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
- C21C7/06—Deoxidising, e.g. killing
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- C—CHEMISTRY; METALLURGY
- 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
- C21C7/10—Handling in a vacuum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
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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
- C22C38/002—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
- C22C38/007—Ferrous alloys, e.g. steel alloys containing silver
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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
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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Abstract
A kind of hot-rolled round steel for high carbon manganese and chrome grinding ball, by mass percentage, including following components：C：0.72~82%, Si：0.17~0.35%, Mn：0.70~0.90%, P：0.010~0.030%, S：0.010~0.030%, Cr：0.50~0.70%, In：0.10~0.20%, Ag：0.20~0.30%, Cu：0.15~0.25%, Ga：0.12~0.18%, surplus is Fe and inevitable impurity.Contain the elements such as higher carbon and manganese in this kind of round steel, thus the abrading-ball made by it has greater hardness, so can ensure good wearability in the larger object of abrasive hardness, simultaneously, the also chromium containing high level inside it, so that it is had stronger corrosion resistant ability, is ground so it is adapted for use with multiple fields.
Description
Technical field
The present invention relates to metal smelt field, more particularly to a kind of hot-rolled round steel for high carbon manganese and chrome grinding ball and its manufacturer
Method.
Background technology
The use of wear-resistant material spreads all over each department of metallurgy, mine, building materials, thermoelectricity and machinery industry, and type is more, quantity
Greatly.High manganese steel wear resistant part is the abrading-ball materials generally used for a long time, occupies me by the superseded high manganese steel wear resistant part of foreign countries
The significant proportion of state's usage amount, but in the case where impact operating mode is little, wearability and service life are not in full use, namely
Under the conditions of low stress impact abrasive wear, high manganese steel wear resistant part cannot play material property advantage, increase unnecessary life
Produce cost.
Therefore, research and development abrasion resistance material is actually needed according to wear working condition to have a very important significance.Xie Jing
The works such as pendant《Abrasion resistant cast steel and melting》One book shows the research and development of alloy abrasion resistant steel in middle and high carbon and low-alloy abrasion-resistant stee and middle and high carbon
Low impact or shock-free wear working condition during potassium steel is applied to gradually are substituted, and shows good performance.Such as
ZG50SiMn2Mo abrasion-resistant stees are the wearing pieces such as the ball mill used for the industries such as metallurgy, cement, abrading-ball, the tup of crusher
Abrasion resistance material, which is made of the element of following percentage：0.4~0.6%C, 1.5~2.0%Si, 2.0~3.0%
Mn, 0.2~0.5%Mo, micro B, V, Re, surplus are Fe and inevitable impurity；The steel, which is cast in, takes out sky more than 850 DEG C
The tissue based on bainite is obtained after cold, is a kind of Mn-B systems wear-resistant bainite cast steel.ZG30CrMn2SiReB martensites are resistance to
Mill cast steel is for non-strong impact working condition and a kind of abrasion resistance material instead of potassium steel for developing, is a kind of Cr-Mn-Si
It is steel, which is made of the element of following percentage：0.27~0.33%C, 0.8~1.1%Si, 1.0~1.5%Mn, 0.8~
1.2%Cr, 0.1~0.15%Re, 0.005~0.007%B, surplus are Fe and inevitable impurity.ZG50SiMn2Mo is resistance to
The design of mill steel obtains bainite structure after mainly using composition design realization air-cooled, but this composition design is of high cost；
ZG30CrMn2SiReB martensite wear resistant cast steel carbon contents are not high, there is enough toughness deposits, and medium suitable for abrasive hardness is resistance to
Grind part.The present invention is a kind of high carbon manganese and chrome abrasion resistance material, and carbon content is high, and the hardness of steel is high, and wearability is good, is taken using manganese chromium
Coordinate aurification, steel that there is excellent quenching degree, is suitable for the high wearing piece of abrasive hardness.
Invention content
The purpose of the present invention is to provide a kind of hot-rolled round steel for high carbon manganese and chrome grinding ball and its manufacturing method, the circle that is produced
Steel has higher hardness, and wearability is good, is all generally applicable in the ball mill that most of operating modes are low stress impact.
The present invention above-mentioned purpose technical scheme is that：A kind of high carbon manganese and chrome grinding ball is justified with hot rolling
Steel, by mass percentage, including following components：C：0.72~82%, Si：0.17~0.35%, Mn：0.70~0.90%,
P：0.010~0.030%, S：0.010~0.030%, Cr：0.50~0.70%, In：0.10~0.20%, Ag：0.20~
0.30%, Cu：0.15~0.25%, Ga：0.12~0.18%, surplus is Fe and inevitable impurity.
Including following components preferably, by mass percentage,：C：0.78%, Si：0.26%, Mn：0.79%, P：
0.021%, S：0.020%, Cr：0.60%, In：0.15%, Ag：0.26%, Cu：0.20%, Ga：0.15%, surplus Fe
With inevitable impurity.
By using above-mentioned technical proposal, Ga can be combined with the various ingredients in ladle, and Ga and In forms eutectic,
Eutectic temperature is 15.7 DEG C, and Ga can dissolve 10% as the β solid solution of function admirable in In, and Ga-Cu forms peritectoid type binary shape
State, Ga can dissolve 17.5% in Cu, form that single-phase αsolidsolution, plasticity are good, machinability is good, and Ag-Ga also forms peritectoid type two
First state can effectively enhance the hardness of steel entirety under normal temperature state, so that manufactured abrading-ball is with higher hard
Degree, and Ag-14Ga can enhance being processed with excellent plasticity, changeable type for steel.
And Cu and Si can form Cu-Si alloys during the entire process of capable of manufacturing, can improve the wearability of abrading-ball
Can, also, Cu can also enhance the intensity of abrading-ball, to be conducive to extend the service life of abrading-ball.
In addition, Mn can form higher melting-point MnS with S, the hot-short phenomenon caused by FeS can be prevented.Mn has increase
The tendency and temper brittleness sensibility of crystalline grain of steel roughening are conducive to the hardness and wearability that finally improve abrading-ball.
And Cr can improve the intensity and hardness of carbon steel as-rolled condition.Reduce elongation and the contraction percentage of area.And contain
There is the abrading-ball of Cr steel is ground to be easy to get higher suface processing quality, meanwhile, the corrosion resistance of abrading-ball can also be enhanced
It can so that abrading-ball is adapted to more fields, reduces probability of the abrading-ball by acid and alkali corrosion.
A kind of manufacturing method of hot-rolled round steel for high carbon manganese and chrome grinding ball, includes the following steps：
S1, by mass percentage will contain C 0.67~0.73%, Si 0.10~0.17%, Mn 0.70~0.80%, Cr
0.45~0.55%, P 0.018~0.020%, S 0.100~0.120% steel be added in converter and smelted, Zhi Houyi
It is secondary that artificial graphite, deoxidier, carbon manganese, ferrosilicon, high carbon ferro-chrome, silver, copper, indium and gallium is added to converter China and whole from converter
Furnace bottom is blown into Ar, and the terminal smelted is C >=0.15%, P≤0.018%, and the temperature of molten iron reaches 1620~1650 DEG C, later
It taps；
S2, the molten steel tapped in S1 is transferred to during LF stoves are refined, and Ar is blown into from LF stove furnace bottoms, while added to LF stoves
Enter lime, silicon carbide, calcium carbide and fluorite and carry out energization slag making, ladle is hung out later；
S3, ladle in S2 is hung in VD stoves, and Ar is blown into from VD stove furnace bottoms, be carried out at the same time closing lid Fruit storage, passed through
After soft blow processing, bull ladle is come out of the stove；
S4, ladle is noted into strand by conticaster, control continuous casting production steel temperature is 1483~1498 DEG C, and utilizes crystallizer
Protect high-carbon covering slag；
S5, steel billet are 1190~1200 DEG C in the soaking temperature of heating furnace, and heating time is 2.5~3.5h, start rolling temperature 1090
~1130 DEG C, hot rolled circular steel is made in 860~980 DEG C of finishing temperature.
By using above-mentioned technical proposal, it is all passed through Ar gas during smelting and refining, is conducive in this way to molten steel
Protection is played, ensure that the normal deoxidation of molten steel, while also reducing the probability that molten steel is again be oxidized.In addition, final production
Round steel out has stronger hardness, and the stronger wearability having after abrading-ball is made to also improve it.
Preferably, in S1 converter during tapping, toward ladle in be added lime, the amount that lime is added is converter loading
The 0.43~0.45% of material total weight.
By using above-mentioned technical proposal, during tapping, lime is added, lime can be made to become covering in this way
Agent reduces the probability for being mixed into oxygen in molten steel and alloy being caused to be aoxidized with this.
Preferably, artificial graphite, deoxidier, carbon manganese, ferrosilicon, high carbon ferro-chrome, silver, copper, indium and gallium to be added are whole in S1
Melting and then addition lime and dolomite into converter.
By using above-mentioned technical proposal, it is to during smelting, remove effectively conjunction that deoxidier, which is added,
Oxygen element in gold reduces the brittleness of steel with this, to be conducive to improve the service life of steel.In addition, due to active lime
Crystal grain is tiny, and lattice is unstable, and the porosity is high, and response area is big, can be melted with formation such as FeO, MnO of infiltration lime hole rapidly
It puts lower melt and melts slagging.And Si, S, P in molten steel easily generate acidic oxide and enter in Strong oxdiative environment
Clinker, and converter lining is generally basic matterial, the substance of two kinds of property of soda acid chemically reacts under the high temperature conditions, generates
The substance of low melting point enters clinker and causes to corrode furnace lining in object.And lime is added, rapid melting enters the effective of clinker
CaO can quickly neutralize the acidity of clinker, while shorten the duration of heat, accordingly improve furnace life, therefore improve stove to protection furnace lining
Age creates condition.
And the material slag making for the MgO that dolomite contains replaces part lime, increases content of MgO in slag charge, it is possible to reduce stove
MgO in lining is shifted into clinker, and can also promote slugging early period, is reduced fluorite dosage and thickening finishing slag, is mitigated clinker pair
The etch of furnace lining, extending furnace lining life.
Preferably, ladle is being hung out the stokeholds LF in S2, and silicon-calcium wire 150~200m/ stoves, wire-feeding velocity 3 are fed to LF stoves
~5m/s.
By using above-mentioned technical proposal, feeding silicon-calcium wire makes the inclusion modification in ladle, due to generally all being deposited in molten steel
In a large amount of Al2O3Solid phase field trash may block middle water containing opening in casting process, and molten steel is after calcium is managed, Al2O3Solid phase is pressed from both sides
Sundries can be converted into low melting point CaAlO3Liquid phase is mingled with, and can assemble and exclude quickly.
Preferably, energization slag making is divided into and being powered twice in S2, is powered uses 6 step voltage sluggings for the first time, and power transmission heating is made
Slag 10min, second of energization uses 4 step voltages, while lime adds 2~3 batches, total amount >=500Kg.
By using above-mentioned technical proposal, first with 6 step voltage sluggings, this is to be able to make each impurity in molten steel
Substance and element rapidly occur the fracture of chemical bond with the essential element of molten steel and detach, and use 4 step voltages later, and simultaneously
Lime is added, lime and impurity substances and impurity element can be made to chemically react in this way, generate new stabilizing slag, in turn
Convenient for being removed.
Preferably, after vacuum degree reaches 0.5 support or less in S3, the retention time >=15min.
By using above-mentioned technical proposal, vacuum state is in VD stoves, this ensure that Ar gases can successfully by
Out of, furnace bottom is blown into VD stoves furnace body, plays the role of being effectively protected to the molten steel in VD stoves to advantageously ensure that, avoid
Metal is aoxidized again.
Preferably, in S3 during soft blow, carbonization rice husk is added to VD stoves and covers the full top of the slag.
By using above-mentioned technical proposal, carbonization rice husk is equivalent to surface cosolvent herein, and when metal melting, surface helps
Flux forms protective layer in molten metal surface, so that metal is separated with gas medium, can both reduce the spatter loss of molten metal,
The saturation degree that gas in fusant can be reduced again, prevents the oxidation in steel manufacturing process and scaling loss, together to greatest extent
When charcoal replace conventional production methods plant ash as covering, eliminate K element to the unfavorable of the follow-up rustless property of steel
It influences.
Preferably, in S4 in unwrap Jiao Houzhong Baogangs liquid to when 2/3 height be added in covering agent, wait for that molten steel reaches highest
Afterwards, carbonization rice husk is added.
By using above-mentioned technical proposal, coverture is added into middle packet several times, multilayer protection can be formed in this way, from
And the spatter loss of molten metal on the one hand can be reduced, the saturation degree of gas in fusant on the other hand can be also reduced, most
Prevent to limits the oxidation in middle packet casting process and scaling loss.
In conclusion the invention has the advantages that：
1, contain Mn elements in round steel, greatly strengthen the hardness of steel in this way, improve the wearability of abrading-ball, while Cr elements
Also the corrosion resistance that can enhance round steel, to be conducive to improve the service life of abrading-ball；
2, in smelting and refining process, it is passed through Ar gases always, and be vacuum-treated again, guarantor is played to molten steel in this way
Shield avoids the probability that molten steel is aoxidized, on the other hand can also ensure that Ar gases can smoothly enter in furnace body；
3, feeding silicon-calcium wire makes the inclusion modification in ladle, due to generally all there are a large amount of Al in molten steel2O3Solid phase field trash,
Middle water containing opening may be blocked in casting process, molten steel is after calcium is managed, Al2O3Solid phase field trash can be converted into low melting point
CaAlO3Liquid phase is mingled with, and can assemble and exclude quickly；
4, in VD stoves, carbonization rice husk is added, when metal melting, carbonization rice husk forms protective layer in molten metal surface, makes
Metal is separated with gas medium, can not only reduce the spatter loss of molten metal, but also can reduce the saturation degree of gas in fusant, most
Oxidation and the scaling loss of limits prevented in steel manufacturing process, while charcoal replaces the plant ash of conventional production methods to make
For covering, adverse effect of the K element to the follow-up rustless property of steel is eliminated.
Description of the drawings
Fig. 1 is the manufacturing process flow diagram of hot-rolled round steel for high carbon manganese and chrome grinding ball.
Specific implementation mode
Below in conjunction with attached drawing 1, invention is further described in detail.
A kind of manufacturing method of hot-rolled round steel for high carbon manganese and chrome grinding ball, includes the following steps：
Step 1：By mass percentage, will contain C 0.67~0.73%, Si 0.10~0.17%, Mn 0.70~
0.80%, Cr 0.45~0.55%, P 0.018~0.020%, S 0.100~0.120% 110t steel be added in converter
It is smelted, artificial graphite, deoxidier, carbon manganese, ferrosilicon, high carbon ferro-chrome, silver, copper, indium and gallium is added into converter successively later,
Add lime and dolomite after all melting, meanwhile, it is whole to be blown into Ar from converter bottom, and the terminal smelted be C >=
0.15%, the temperature of P≤0.018%, molten iron reaches 1620~1650 DEG C, taps later, and to lime is added in ladle,
The amount that lime is added is that converter is packed into the 0.43~0.45% of material total weight；
Step 2：The molten steel tapped in step 1 is transferred to during LF stoves are refined, and Ar is blown into from LF stove furnace bottoms, simultaneously
Lime, silicon carbide, calcium carbide and fluorite is added to LF stoves and carries out energization slag making, be powered uses 6 step voltage sluggings, power transmission to add for the first time
Hot slag making 10min, second, which is powered, uses 4 step voltages, while lime adds 2~3 batches, total amount >=500Kg, backward LF stoves hello silicon
Calcium line 150~200m/ stoves, wire-feeding velocity are 3~5m/s, finally again hang out ladle；
Step 3：Ladle in step 2 is hung in VD stoves, and Ar is blown into from VD stove furnace bottoms, is carried out at the same time closing lid vacuum outgas
Processing, after vacuum degree reaches 0.5 support or less, the retention time >=15min is carrying out soft blow processing later, while adding to VD stoves
Enter carbonization rice husk and cover the full top of the slag, continue to keep 20min, finally carries out bull ladle and come out of the stove；
Step 4：By ladle by conticaster note strand, and in unwrap Jiao Houzhong Baogangs liquid to when 2/3 height be added in coat lid
After molten steel reaches highest carbonization rice husk is added, while whole process control continuous casting production steel temperature is 1483~1498 in agent
DEG C, and protect high-carbon covering slag using crystallizer；
Step 5：Steel billet is 1190~1200 DEG C in the soaking temperature of heating furnace, and heating time is 2.5~3.5h, start rolling temperature
1090~1130 DEG C, hot rolled circular steel is made in 860~980 DEG C of finishing temperature.
Herein, deoxidier is iron-manganese double deoxidizer, and what coverture was selected is the charcoal after destructive distillation.
Table 1：The chemical composition of hot-rolled round steel for high carbon manganese and chrome grinding ball：
| Component | Embodiment one | Embodiment two | Embodiment three | Example IV | Embodiment five |
| C/% | 0.72 | 0.82 | 0.78 | 0.82 | 0.72 |
| Si/% | 0.17 | 0.35 | 0.26 | 0.26 | 0.17 |
| Mn/% | 0.70 | 0.90 | 0.79 | 0.79 | 0.90 |
| P/% | 0.010 | 0.030 | 0.021 | 0.021 | 0.010 |
| S/% | 0.010 | 0.030 | 0.020 | 0.010 | 0.020 |
| Cr/% | 0.50 | 0.70 | 0.60 | 0.50 | 0.60 |
| In/% | 0.10 | 0.20 | 0.15 | 0.20 | 0.20 |
| Ag/% | 0.20 | 0.30 | 0.26 | 0.26 | 0.30 |
| Cu/% | 0.15 | 0.25 | 0.15 | 0.15 | 0.20 |
| Ga/% | 0.12 | 0.18 | 0.15 | 0.12 | 0.12 |
| Fe/% | Surplus | Surplus | Surplus | Surplus | Surplus |
Applicable cases are as follows：
The round steel of embodiment one to embodiment five is produced into extensive abrading-ball, the ball radius of each embodiment using technique for rolling
It is taken as φ 20mm, φ 50mm, φ 100mm respectively.Using water cooling enters incubator after the processing of line immediate quenching after rolling, to life
The hardness of the abrading-ball test different location of production, heat treating regime：+ 200 DEG C of tempering of 810 DEG C/water quenching.
Table 2：The physical index data cases of different size diameter abrading-ball
It can be clearly followed that from upper table 2, the more general abrading-ball of the abrading-ball made by the hot rolled circular steel of the application has higher
Hardness, can embody good wearability in the wearing piece of grinding abrasive hardness height etc..
The hot rolled circular steel of embodiment one to embodiment five is directly immersed in the hydrogen of the hydrochloric acid solution and Ph=14 of Ph=1 respectively
2 hours in sodium hydroxide solution, then takes out and is observed,
Table 3：The hot rolled circular steel variation in Ph=1 and Ph=14 solution environmentals respectively
| Test event | Embodiment one | Embodiment two | Embodiment three | Example IV | Embodiment five |
| Ph=1 | It is unchanged | It is unchanged | It is unchanged | It is unchanged | It is unchanged |
| Ph=14 | It is unchanged | It is unchanged | It is unchanged | It is unchanged | It is unchanged |
It can be seen that the hot rolled circular steel of the application also has the ability of stronger acid-alkali-corrosive-resisting from upper table 3, thus it is made
Abrading-ball be suitble to it is multi-field used, be also beneficial to extend abrading-ball service life.
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 not creative contribution after reading this specification, but as long as at this
It is all protected by Patent Law in the right of invention.
Claims (10)
1. a kind of hot-rolled round steel for high carbon manganese and chrome grinding ball, it is characterised in that：By mass percentage, including following components：C：
0.72~0.82%, Si：0.17~0.35%, Mn：0.70~0.90%, P：0.010~0.030%, S：0.010~
0.030%, Cr：0.50~0.70%, In：0.10~0.20%, Ag：0.20~0.30%, Cu：0.15~0.25%, Ga：
0.12~0.18%, surplus is Fe and inevitable impurity.
2. a kind of hot-rolled round steel for high carbon manganese and chrome grinding ball according to claim 1, it is characterised in that：By weight percent
Meter, including following components：C：0.78%, Si：0.26%, Mn：0.79%, P：0.021%, S：0.020%, Cr：0.60%,
In：0.15%, Ag：0.26%, Cu：0.20%, Ga：0.15%, surplus is Fe and inevitable impurity.
3. a kind of manufacture of hot-rolled round steel for high carbon manganese and chrome grinding ball as described in any one of claims 1 or 2 claim
Method includes the following steps：
S1, by mass percentage will contain C 0.67~0.73%, Si 0.10~0.17%, Mn 0.70~0.80%, Cr
0.45~0.55%, P 0.018~0.020%, S 0.100~0.120% steel be added in converter and smelted, Zhi Houyi
It is secondary that artificial graphite, deoxidier, carbon manganese, ferrosilicon, high carbon ferro-chrome, silver, copper, indium and gallium are added into converter and whole from Converter
Bottom blowing enters Ar, and the terminal smelted is C >=0.15%, P≤0.018%, and the temperature of molten iron reaches 1620~1650 DEG C, it is laggard
Row tapping；
S2, the molten steel tapped in S1 is transferred to during LF stoves are refined, and Ar is blown into from LF stove furnace bottoms, while added to LF stoves
Enter lime, silicon carbide, calcium carbide and fluorite and carry out energization slag making, ladle is hung out later；
S3, ladle in S2 is hung in VD stoves, and Ar is blown into from VD stove furnace bottoms, be carried out at the same time closing lid Fruit storage, passed through
After soft blow processing, bull ladle is come out of the stove；
S4, ladle is noted into strand by conticaster, control continuous casting production steel temperature is 1483~1498 DEG C, and utilizes crystallizer
Protect high-carbon covering slag；
S5, steel billet are 1190~1200 DEG C in the soaking temperature of heating furnace, and heating time is 2.5~3.5h, start rolling temperature 1090
~1130 DEG C, hot rolled circular steel is made in 860~980 DEG C of finishing temperature.
4. a kind of manufacturing method of hot-rolled round steel for high carbon manganese and chrome grinding ball according to claim 3, it is characterised in that：In S1
Converter during tapping, toward ladle in be added lime, the amount that lime is added be converter be packed into material total weight 0.43~
0.45%.
5. a kind of manufacturing method of hot-rolled round steel for high carbon manganese and chrome grinding ball according to claim 4, it is characterised in that：In S1
The all meltings and then to converter of artificial graphite to be added, sulphur, deoxidier, carbon manganese, ferrosilicon, high carbon ferro-chrome, silver, copper, indium and gallium
Middle addition lime and dolomite.
6. a kind of manufacturing method of hot-rolled round steel for high carbon manganese and chrome grinding ball according to claim 3, it is characterised in that：In S2
Ladle is being hung out the stokeholds LF, feeds silicon-calcium wire 150~200m/ stoves to LF stoves, wire-feeding velocity is 3~5m/s.
7. a kind of manufacturing method of hot-rolled round steel for high carbon manganese and chrome grinding ball according to claim 3, it is characterised in that：In S2
Energization slag making is divided into be powered twice, is powered uses 6 step voltage sluggings for the first time, and power transmission heats slag making 10min, is powered adopts for the second time
With 4 step voltages, while lime adds 2~3 batches, total amount >=500Kg.
8. a kind of manufacturing method of hot-rolled round steel for high carbon manganese and chrome grinding ball according to claim 3, it is characterised in that：In S3
After vacuum degree reaches 0.5 support or less, the retention time >=15min.
9. a kind of manufacturing method of hot-rolled round steel for high carbon manganese and chrome grinding ball according to claim 8, it is characterised in that：In S3
During soft blow, carbonization rice husk is added to VD stoves and covers the full top of the slag.
10. a kind of manufacturing method of hot-rolled round steel for high carbon manganese and chrome grinding ball according to claim 3, it is characterised in that：It is excellent
Be selected as, in S4 in unwrap Jiao Houzhong Baogangs liquid to when 2/3 height be added in covering agent, after molten steel reaches highest, be added carbon
Change rice husk.
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