CN103627955B - High-carbon wear-resistant ball material steel and production method thereof - Google Patents
High-carbon wear-resistant ball material steel and production method thereof Download PDFInfo
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Abstract
The invention discloses a kind of production method of high-carbon wear-resistant ball material steel, comprising: converter smelting, LF refining, the degassed and continuous casting of VD.The production technique of high-carbon wear-resistant ball steel of the present invention is simple, can ensure the quality of becoming a useful person of high-carbon wear-resistant ball steel, and improve lumber recovery and production efficiency, production cost is low.
Description
Technical field
The present invention relates to metal material field, specifically, relate to a kind of production method of high-carbon wear-resistant ball material steel.
Background technology
Wear-resistant ball is as the main products in wear resistance castings industry, and its consumption is in occupation of first place in wear resistance castings, and accounting reaches 55%, is widely used in the material grinding production link of the industries such as metallurgical mine, building material cement, thermal power generation, magneticsubstance.
Economic sustained and rapid development promotes the development of the industries such as China mine, building material cement, electric power, and the construction of the major projects such as large hydraulic engineering, high-speed railway, extensive protection Comfortable Housing Project makes the demands of every profession and trade to wear-resistant ball such as mine, building material cement, thermal power generation significantly increase.Although high alloy steel ball wear resistance is fine, but because high alloy ball milling steel adopts die casting mostly, production efficiency is low, cost is high, can not meet the need of market at all, therefore need to produce adapt to wear resistance be better than carbon element steel ball and alloy content low, be suitable for the large novel high wear-resistant steel ball produced of industry.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of production method of high-carbon wear-resistant ball material steel, and production technique is simple, and production cost is low.
Technical scheme of the present invention is as follows:
A kind of production method of high-carbon wear-resistant ball material steel, comprise: converter smelting, LF refining, degassed and the continuous casting of VD, the mass percentage producing the chemical composition of the described high-carbon wear-resistant ball material steel obtained comprises: C0.67 ~ 0.82%, Si0.45 ~ 0.78%, Mn0.89 ~ 1.30%, P≤0.040%, S≤0.040%, V0.03 ~ 0.10%, Cr≤0.20%, Ni≤0.30%, Cu≤0.30%, Mo≤0.15%, and all the other are Fe and impurity; The whole process soft blow argon gas that described VD is degassed, described VD degassed soft blow time is 10 ~ 12min, and soft blow flow is 50 ~ 60Nl/min, and temperature of appearing on the stage is 1562 ~ 1575 DEG C; The gas content of the degassed rear every 100 tons of molten steel of described VD is O
2≤ 50ppm, N
2≤ 90ppm, H
2≤ 2.5ppm; The degassed rear every 100 tons of molten steel feeding silicon-calcium wire 100m of described VD carries out inclusion modification; Dark vacuum time>=13min that described VD is degassed; The superheating temperature of described continuous casting is 23 ~ 30 DEG C, and pulling rate is 2.00 ~ 2.10m/min.
Further: mass percentage≤0.13% of the P of the initial molten iron of described converter smelting, mass percentage≤0.050% of S; The tapping temperature of the endpoint molten steel of described converter smelting is 1605 ~ 1635 DEG C, and the mass percentage of the mass percentage of C to be the mass percentage of 0.10 ~ 0.30%, P be 0.001 ~ 0.018%, S is 0.005-0.024%.
Further: in the smelting process of described converter smelting, every 100 tons of molten iron add lime 2600-3700kg, rhombspar 860-2760kg, iron sheet 560-1800kg, fluorite 50-100kg; In the tapping process of described converter smelting, every 100 tons of molten iron add silicon iron 400-500kg, hard coal 550-600kg, aluminium calcium barium 200kg, silicon manganese 900kg and slag iron 3100-3600kg and carry out deoxidation alloying.
Further, described LF refining comprises and adds auxiliary material slag making, adds alloy fine setting; The described auxiliary material that every 100 tons of molten steel add comprises: lime 500-800kg, fluorite 60-95kg, alumina 150-200kg, calcium carbide 100kg; The described alloy that every 100 tons of molten steel add comprises: ferromanganese 50-300kg, ferrosilicon 30-50kg, aluminum steel 100m; Later stage every 100 tons of molten steel of described LF refining add 40kg vanadium iron.
Further: the temperature in place of described LF refining is 1479 ~ 1495 DEG C, temperature of offing normal is 1540 ~ 1562 DEG C, and refining time is 28 ~ 39min.
Further, the mass percentage producing the chemical composition of the material of the described high-carbon wear-resistant ball material steel obtained comprises: C0.67%, Si0.78%, Mn1.25%, P0.008%, S0.003%, V0.045%, Cr0.15%, Ni0.05%, Cu0.09%, Mo0.03%; Or, C0.75%, Si0.58%, Mn1.10%, P0.023%, S0.014%, V0.046%, Cr0.18%, Ni0.11%, Cu0.19%, Mo0.10%; Or, C0.81%, Si0.45%, Mn0.89%, P0.015%, S0.009%, V0.040%, Cr0.20%, Ni0.17%, Cu0.23%, Mo0.09%; Or, C0.68%, Si0.65%, Mn1.30%, P0.040%, S0.020%, V0.10%, Cr0.09%, Ni0.30%, Cu0.14%, Mo0.15%; Or, C0.82%, Si0.55%, Mn0.90%, P0.030%, S0.040%, V0.030%, Cr0.11%, Ni0.21%, Cu0.30%, Mo0.12%.
Technique effect of the present invention is as follows:
1, the cost of high-carbon wear-resistant ball steel of the present invention is low, and steel is even, cleanliness factor is high, wear-resisting and impact resistance good.
2, the production technique of high-carbon wear-resistant ball steel of the present invention is simple, can ensure the quality of becoming a useful person of high-carbon wear-resistant ball steel, and improve lumber recovery and production efficiency, production cost is low.
Embodiment
The idiographic flow of the production method of high-carbon wear-resistant ball steel of the present invention is as follows:
Step S1: converter smelting
Mass percentage≤0.13% of the P of the initial molten iron of converter smelting, mass percentage≤0.050% of S.The tapping temperature of the endpoint molten steel of converter smelting is 1605 ~ 1635 DEG C, and the mass percentage of the mass percentage of C to be the mass percentage of 0.10 ~ 0.30%, P be 0.001 ~ 0.018%, S is 0.005 ~ 0.024%.In the smelting process of converter smelting, every 100 tons of molten iron add lime 2600-3700kg, rhombspar 860-2760kg, iron sheet 560-1800kg, fluorite 50-100kg.In the tapping process of converter smelting, every 100 tons of molten iron add silicon iron 400-500kg, hard coal 550-600kg, aluminium calcium barium 200kg, silicon manganese 900kg and slag iron 3100-3600kg and carry out deoxidation alloying.The related process parameters of the converter smelting of each embodiment as shown in Table 1 to Table 3.
The tapping temperature of converter of each embodiment of table 1 and the composition of endpoint molten steel
The quality (kg/100t) of material is added in the smelting process of the converter smelting of each embodiment of table 2
| Embodiment | Lime | Rhombspar | Iron sheet | Fluorite |
| 1 | 2600 | 2000 | 1800 | 50 |
| 2 | 3000 | 860 | 1500 | 100 |
| 3 | 3670 | 2760 | 560 | 70 |
| 4 | 3000 | 1000 | 600 | 65 |
| 5 | 3700 | 1900 | 1300 | 85 |
The quality (kg/100t) of material is added in the tapping process of the converter smelting of each embodiment of table 3
| Embodiment | Silicon iron | Hard coal | Aluminium calcium barium | Silicon manganese | Slag iron |
| 1 | 450 | 580 | 200 | 900 | 3400 |
| 2 | 400 | 600 | 200 | 900 | 3600 |
| 3 | 490 | 550 | 200 | 900 | 3100 |
| 4 | 450 | 550 | 200 | 900 | 3300 |
| 5 | 500 | 540 | 200 | 900 | 3100 |
Step S2:LF refining
LF refining is carried out adding auxiliary material slag making according to molten steel composition and temperature variation, adds alloy and carries out finely tuning and warming temperature.Be specially every 100 tons of molten steel to add following composition and carry out adding auxiliary material slag making: lime 500-800kg, fluorite 60-95kg, alumina 150-200kg, calcium carbide 100kg.Add following alloy according to the every 100 tons of molten steel of refining composition in place to finely tune: ferromanganese 50-300kg, ferrosilicon 30-50kg, aluminum steel 100m.The temperature in place of LF refining is 1479 ~ 1495 DEG C, and temperature of offing normal is 1540 ~ 1562 DEG C, and refining time is 28 ~ 39min.Vanadium iron 40kg is added in molten steel by the every 100 tons of molten steel of high-carbon wear-resistant ball material composition of steel requirement in the later stage of LF refining.The related process parameters of the LF refining of each embodiment is as shown in table 4 ~ table 6.
The furnace temperature Controlling Technology parameter of the LF refining of each embodiment of table 4
| Embodiment | Refining temperature DEG C in place | Refining is offed normal temperature DEG C | Refining treatment time min |
| 1 | 1479 | 1550 | 28 |
| 2 | 1495 | 1562 | 39 |
| 3 | 1480 | 1540 | 35 |
| 4 | 1490 | 1548 | 33 |
| 5 | 1485 | 1557 | 36 |
The content (kg/100t) of the auxiliary material for slag making of each embodiment of table 5
| Embodiment | Lime | Fluorite | Alumina | Calcium carbide |
| 1 | 500 | 65 | 150 | 100 |
| 2 | 670 | 95 | 200 | 100 |
| 3 | 790 | 70 | 180 | 100 |
| 4 | 550 | 60 | 200 | 100 |
| 5 | 800 | 90 | 160 | 100 |
The content of alloy for finely tuning of each embodiment of table 6
| Embodiment | Ferromanganese (kg/100t) | Ferrosilicon (kg/100t) | Aluminum steel (m/100t) | Vanadium iron (kg/100t) |
| 1 | 100 | 50 | 100 | 40 |
| 2 | 50 | 45 | 100 | 40 |
| 3 | 289 | 30 | 100 | 40 |
| 4 | 300 | 35 | 100 | 40 |
| 5 | 80 | 50 | 100 | 40 |
step S3:VD is degassed
After LF refining, molten steel is through VD stove Fruit storage, reduces obnoxious flavour content in steel further, improves the cleanliness factor of steel, VD degassed whole process soft blow argon gas.VD degassed soft blow time is 10 ~ 12min, and soft blow flow is 50 ~ 60Nl/min, and temperature of appearing on the stage is 1562 ~ 1575 DEG C.The gas content of the degassed rear every 100 tons of molten steel of VD is O
2≤ 50ppm, N
2≤ 90ppm, H
2≤ 2.5ppm.The degassed rear every 100 tons of molten steel feeding silicon-calcium wire 100m of VD carries out inclusion modification, dark vacuum time >=13min that VD is degassed.The related process parameters that the VD of each embodiment is degassed is as shown in table 7
The VD degasification technique parameter of each embodiment of table 7
| Embodiment | Soft blow time min | Soft blow flow NL/min | To appear on the stage temperature DEG C |
| 1 | 10 | 50 | 1562 |
| 2 | 12 | 60 | 1575 |
| 3 | 11 | 53 | 1568 |
| 4 | 10 | 55 | 1573 |
| 5 | 11 | 57 | 1570 |
Step S4: continuous casting
In continuous casting production, the superheating temperature of continuous casting is 23 ~ 30 DEG C, and pulling rate is 2.00 ~ 2.10m/min.The related process parameters of the continuous casting of each embodiment is as shown in table 8.
The superheating temperature of the continuous casting of each embodiment of table 8 and pulling rate
| Embodiment | Superheating temperature (DEG C) | Pulling rate (m/min) |
| 1 | 25 | 2.10 |
| 2 | 23 | 2.00 |
| 3 | 30 | 2.10 |
| 4 | 27 | 2.05 |
| 5 | 29 | 2.10 |
Through above-mentioned production process, the mass percentage of the chemical composition of the material of the high-carbon wear-resistant ball steel prepared comprises: C0.67 ~ 0.82%, Si0.45 ~ 0.78%, Mn0.89 ~ 1.30%, P≤0.040%, S≤0.040%, V0.03 ~ 0.10%, Cr≤0.20%, Ni≤0.30%, Cu≤0.30%, Mo≤0.15%, and all the other are Fe and impurity.The mass percentage of the composition of the finished product of each embodiment is as shown in table 9.
The finished product composition (%) of each embodiment of table 9
| Embodiment | C | Si | Mn | P | S | V | Cr | Ni | Cu | Mo |
| 1 | 0.67 | 0.78 | 1.25 | 0.008 | 0.003 | 0.045 | 0.15 | 0.05 | 0.09 | 0.03 |
| 2 | 0.75 | 0.58 | 1.10 | 0.023 | 0.014 | 0.046 | 0.18 | 0.11 | 0.19 | 0.10 |
| 3 | 0.81 | 0.45 | 0.89 | 0.015 | 0.009 | 0.040 | 0.20 | 0.17 | 0.23 | 0.09 |
| 4 | 0.68 | 0.65 | 1.30 | 0.040 | 0.020 | 0.100 | 0.09 | 0.30 | 0.14 | 0.15 |
| 5 | 0.82 | 0.55 | 0.90 | 0.030 | 0.040 | 0.030 | 0.11 | 0.21 | 0.30 | 0.12 |
Step S5: detect surface quality of continuously cast slab
Detect the surface quality of the continuously cast bloom of above-described embodiment, its surface quality meets completely produces the requirement of wear-resistant ball material.
Step S6: rolling high-carbon wear-resistant ball material steel
Above-mentioned continuously cast bloom adopts continuous rolling process, through Continuous mill train, is rolled into round steel, and round steel meets forging or rolling steel ball steel requirement, and the hot rolled circular steel surface hardness of each embodiment is as shown in table 10.
Table 10 hot rolled circular steel surface hardness
High-carbon wear-resistant ball steel cost of the present invention is low, and steel is even, cleanliness factor is high, wear-resisting and impact resistance good; And production technique is simple, can ensure to become a useful person quality, improve lumber recovery and production efficiency, production cost is low.
Claims (4)
1. a production method for high-carbon wear-resistant ball material steel, is characterized in that, comprising: converter smelting, LF refining, the degassed and continuous casting of VD, and described LF refining comprises and adds auxiliary material slag making, add alloy fine setting; The described auxiliary material that every 100 tons of molten steel add comprises: lime 500-800kg, fluorite 60-95kg, alumina 150-200kg, calcium carbide 100kg; The described alloy that every 100 tons of molten steel add comprises: ferromanganese 50-300kg, ferrosilicon 30-50kg, aluminum steel 100m; Later stage every 100 tons of molten steel of described LF refining add 40kg vanadium iron; The temperature in place of described LF refining is 1479 ~ 1495 DEG C, and temperature of offing normal is 1540 ~ 1562 DEG C, and refining time is 28 ~ 39min; The mass percentage producing the chemical composition of the described high-carbon wear-resistant ball material steel obtained comprises: C0.67 ~ 0.82%, Si0.45 ~ 0.78%, Mn0.89 ~ 1.30%, P≤0.040%, S≤0.040%, V0.03 ~ 0.10%, Cr≤0.20%, Ni≤0.30%, Cu≤0.30%, Mo≤0.15%, and all the other are Fe and impurity; The whole process soft blow argon gas that described VD is degassed, described VD degassed soft blow time is 10 ~ 12min, and soft blow flow is 50 ~ 60Nl/min, and temperature of appearing on the stage is 1562 ~ 1575 DEG C; The gas content of the degassed rear every 100 tons of molten steel of described VD is O
2≤ 50ppm, N
2≤ 90ppm, H
2≤ 2.5ppm; The degassed rear every 100 tons of molten steel feeding silicon-calcium wire 100m of described VD carries out inclusion modification; Dark vacuum time>=13min that described VD is degassed; The superheating temperature of described continuous casting is 23 ~ 30 DEG C, and pulling rate is 2.00 ~ 2.10m/min.
2. the production method of high-carbon wear-resistant ball material steel as claimed in claim 1, is characterized in that: mass percentage≤0.13% of the P of the initial molten iron of described converter smelting, mass percentage≤0.050% of S; The tapping temperature of the endpoint molten steel of described converter smelting is 1605 ~ 1635 DEG C, and the mass percentage of the mass percentage of C to be the mass percentage of 0.10 ~ 0.30%, P be 0.001 ~ 0.018%, S is 0.005-0.024%.
3. the production method of high-carbon wear-resistant ball material steel as claimed in claim 2, is characterized in that: in the smelting process of described converter smelting, every 100 tons of molten iron add lime 2600-3700kg, rhombspar 860-2760kg, iron sheet 560-1800kg, fluorite 50-100kg; In the tapping process of described converter smelting, every 100 tons of molten iron add silicon iron 400-500kg, hard coal 550-600kg, aluminium calcium barium 200kg, silicon manganese 900kg and slag iron 3100-3600kg and carry out deoxidation alloying.
4. the production method of high-carbon wear-resistant ball material steel as claimed in claim 1, it is characterized in that, the mass percentage producing the chemical composition of the described high-carbon wear-resistant ball material steel obtained comprises: C0.67%, Si0.78%, Mn1.25%, P0.008%, S0.003%, V0.045%, Cr0.15%, Ni0.05%, Cu0.09%, Mo0.03%; Or, C0.75%, Si0.58%, Mn1.10%, P0.023%, S0.014%, V0.046%, Cr0.18%, Ni0.11%, Cu0.19%, Mo0.10%; Or, C0.81%, Si0.45%, Mn0.89%, P0.015%, S0.009%, V0.040%, Cr0.20%, Ni0.17%, Cu0.23%, Mo0.09%; Or, C0.68%, Si0.65%, Mn1.30%, P0.040%, S0.020%, V0.10%, Cr0.09%, Ni0.30%, Cu0.14%, Mo0.15%; Or, C0.82%, Si0.55%, Mn0.90%, P0.030%, S0.040%, V0.030%, Cr0.11%, Ni0.21%, Cu0.30%, Mo0.12%.
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