CN102758140B - High-carbon microalloying steel ball and production process thereof - Google Patents
High-carbon microalloying steel ball and production process thereof Download PDFInfo
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- CN102758140B CN102758140B CN201210229195.8A CN201210229195A CN102758140B CN 102758140 B CN102758140 B CN 102758140B CN 201210229195 A CN201210229195 A CN 201210229195A CN 102758140 B CN102758140 B CN 102758140B
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Abstract
The invention discloses a production process of a high-carbon microalloying steel ball. The production process comprises the following steps of: heating a steel ball blank to be 1,200-1,250 DEG C and forging the steel ball blank to a steel ball of which the size is required; precooling the steel ball until the temperature of the surface layer of the steel ball is 800-850 DEG C; putting the steel ball into clear water at the temperature of 30-60 DEG C to quench until the temperature of surface layer of the steel ball is reduced to 280-340 DEG C, and taking out the steel ball; 1-2s later, putting the steel ball into mechanical oil at the temperature of 30-50 DEG C to quench until the temperature of surface layer of the steel ball is reduced be below 60 DEG C; taking out the steel ball and putting the steel ball into mechanical oil at the temperature of 200-240 DEG C to temper for not less than 4 hours; and taking out and finishing the steel ball to obtain a steel ball finished product, wherein according to the weight percentage, the steel ball contains 0.90-1.05 percent of C, 0.30-0.70 percent of Si, 0.80-1.20 percent of Mn, 0.25-0.40 percent of Cr and the balance being Fe and inevitable impurities. The high-carbon microalloying steel ball is prepared by using the production process, and the quenching and cracking of the steel ball can be effectively avoided; and compared with the conventional high-carbon microalloying steel ball, the prepared high-carbon microalloying steel ball has the same performance, and obviously reduces alloy contents and production cost.
Description
Technical field
The present invention relates to the steel ball that ball mill is used, more particularly, relate to a kind of high-carbon microalloying steel ball and production technique thereof.
Background technology
Manufacture for forging rolling waste heat class ball mill with steel ball, the main component of steel ball adopts the C content of 0.60-0.85% conventionally at present, and add suitable Si, Mn element, simultaneously according to the diameter of steel ball and to steel ball top layer and the poor different requirements of centre hardness, in steel ball, be aided with elements such as adding appropriate Cr, Mo, Ni, Cu, V, Nb, to improve hardness, abrasion resistance properties and the corrosion resistance nature etc. of steel ball.
Carbon is the most cheap, the most effective strengthening element in steel, if but further improve the carbon content in steel ball, to steel ball be ftractureed in the quenching process of the single quenchants such as clear water, cause steel ball to use, limited thus the raising of carbon content in steel ball, and alloying element is because expensive and use procedure cannot be reclaimed, cause the manufacturing cost of high-performance steel ball and service efficiency to be difficult to effective raising.
Therefore, for the steel ball of high-carbon content, need a kind of production technique badly, reach the effect of instead of steel ball interalloy element that is used for by thermal treatment process, thereby reach the object that improves steel ball utilization ratio, reduces production costs.
Summary of the invention
For the deficiencies in the prior art, the object of the present invention is to provide a kind of production technique for high-carbon microalloying steel ball, effectively to avoid the hardening break in steel ball hot treating processes.
To achieve these goals, an aspect of of the present present invention provides a kind of production technique of high-carbon microalloying steel ball, and described production technique comprises the following steps: the steel ball that steel ball base is heated to be forged to after 1200-1250 ℃ to desired size; The skin temperature that steel ball is chilled in advance to steel ball is 800-850 ℃; Steel ball is dropped into after the skin temperature that is quenched to steel ball in the clear water of 30-60 ℃ is down to 280-340 ℃ and take out; After the 1-2s of interval, steel ball being dropped into the surface temperature that is quenched to steel ball in the machine oil of 30-50 ℃ is down to below 60 ℃; Take out steel ball and be placed in the mechanical blazing-off of 200-240 ℃ and be not less than 4 hours; Take out steel ball, through finishing, process and can obtain finished product steel ball, wherein, by weight percentage, the Si of C, 0.30-0.70% that described steel ball base contains 0.90-1.05% is, the Cr of the Mn of 0.80-1.20%, 0.25-0.40% and the Fe of surplus and inevitably impurity.
According to an embodiment of the production technique of high-carbon microalloying steel ball of the present invention, adopt the operational path of converter smelting, secondary refining, continuous casting to manufacture described steel ball base.
According to an embodiment of the production technique of high-carbon microalloying steel ball of the present invention, described steel ball base is that cross dimensions is the billet of 60mm * 60mm-75mm * 75mm.
According to an embodiment of the production technique of high-carbon microalloying steel ball of the present invention, the diameter of described steel ball is 100-150mm.
According to an embodiment of the production technique of high-carbon microalloying steel ball of the present invention, described steel ball needs ceaselessly to roll continuously when clear water or machine oil quenching.
According to an embodiment of the production technique of high-carbon microalloying steel ball of the present invention, described machine oil is No. 10 machine oil.
According to an embodiment of the production technique of high-carbon microalloying steel ball of the present invention, described machinery oil is 50-100 machinery oil.
According to an embodiment of the production technique of high-carbon microalloying steel ball of the present invention, described steel ball base is heated to the step of 1200-1250 ℃ is also included in before forging is that the steel ball base insulation of 1200-1250 ℃ is more than 10 minutes by temperature.
Another aspect of the present invention also provides a kind of high-carbon microalloying steel ball, and described high-carbon microalloying steel ball adopts above-mentioned production technique to make.
According to an embodiment of high-carbon microalloying steel ball of the present invention, described high-carbon microalloying steel ball contain by weight the C of 0.90-1.05%, the Mn of the Si of 0.30-0.70%, 0.80-1.20%, the Fe of the Cr of 0.25-0.40% and surplus and inevitably impurity.
The production technique of high-carbon microalloying steel ball of the present invention has adopted the steel billet of the C content range of 0.90-1.05%, the steel ball quenching problems of crack of bringing for fear of high-carbon content, further adopted clear water machine oil double quenching technique, not only can effectively avoid steel ball quenching cracking, and the high-carbon microalloying steel ball obtaining has identical performance with former high-carbon high-alloy steel ball, alloy content and production cost significantly reduce, and have splendid dissemination.
Accompanying drawing explanation
Fig. 1 is the production technique schematic diagram of high-carbon microalloying steel ball of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the production technique of high-carbon microalloying steel ball of the present invention is described in detail.
By weight percentage, the Si of C, 0.30-0.70% that the high-carbon microalloying steel ball base that the production technique of high-carbon microalloying steel ball of the present invention adopts contains 0.90-1.05% is, the Cr of the Mn of 0.80-1.20%, 0.25-0.40% and the Fe of surplus and inevitably impurity.Wherein, carbon content is higher, and alloying element content is lower.Particularly, while manufacturing this steel ball base, can adopt the operational path manufacture of converter smelting, secondary refining, continuous casting.In order to obtain the steel ball of desired size, also need steel ball base to carry out the billet that scale cuts post-heating and is rolled into certain size, the size of billet should be corresponding with the desired size of steel ball, for example, the cross dimensions of billet is 60mm * 60mm-75mm * 75mm, and the diameter of steel ball is 100-150mm.
Fig. 1 is the production technique schematic diagram of high-carbon microalloying steel ball of the present invention.As shown in Figure 1, production technique of the present invention comprises following several step, first, steel ball base is heated to be forged to after 1200-1250 ℃ to the steel ball of desired size.Forging is for obtaining the necessary operation of the steel ball of required diameter or shape, forging at present the general 250kg of employing or 500kg air hammer completes, if Heating temperature is over 1250 ℃, the autstenitic grain size of steel ball base, by there being the trend even overheated, burning of significantly growing up, is unfavorable for the performance that steel ball is final; If Heating temperature is forged after 1200 ℃, final forging temperature is too low, and resistance to deformation increases, and is unfavorable for improving the circularity of steel ball.
The skin temperature that steel ball is chilled in advance to steel ball is 800-850 ℃.Conventionally, temperature after steel ball finish-forging is approximately 900-950 ℃, if now directly quenched, because thermal capacitance is higher, cause thermal stresses excessive on the one hand, steel ball easily ftractures and causes brokenly ball, and the condensate depression of the whole section of steel ball will reduce on the other hand, be unfavorable for improving the performance of steel ball, therefore the surface temperature that need be chilled in advance steel ball to steel ball is 800-850 ℃, this is by the raising of steel ball performance after being conducive to quench.Conventionally, the steel ball after forging is directly placed in to bottom with carrying out precooling on the stand of through hole.
Afterwards, steel ball is dropped into after the skin temperature that is quenched to steel ball in the clear water of 30-60 ℃ is down to 280-340 ℃ and will take out.Wherein, in order to guarantee the homogeneity of water temperature, preferably, Rinsing Area need be equipped with water circulation cooling device or heat abstractor, and the water temperature when guaranteeing to produce is continuously constant within the scope of 30-60 ℃.After the 1-2s of interval, steel ball being dropped into the surface temperature that is quenched to steel ball in the machine oil of 30-50 ℃ is down to below 60 ℃.Should be noted, steel ball needs ceaselessly to roll continuously when clear water or machine oil quenching, with the uniformity coefficient that guarantees to quench.Particularly, machine oil can be No. 10 machine oil.Here, the present invention adopts single-stage quenching technique different from the past, and adopts the double quenching technique of oil after first water, improves the performance of steel ball, and then reduce alloy content the final production cost that reduces steel ball of steel ball by meticulous operation.
Particularly, the temperature range that changes quenchant is chosen to be the reason of 280-340 ℃ and is: because the cooling power of clear water is very strong, steel ball in austenite phase region need be quickly cooled to and approach the temperature that Ms is ordered in clear water, to avoid supercooled austenite generation perlite and bainite transformation.And the cooling power of No. 10 machine oil is weaker than clear water, after quenching, clear water with machine oil, quenches again, can make steel ball continue in machine oil cooling, guarantee that supercooled austenite changes martensite under Slow cooling condition, adopt above-mentioned double quenching technique both can guarantee that steel ball obtained martensitic stucture, improve hardness and the abrasion resistance properties of steel ball, can reduce again steel ball in the speed of cooling of martensite range, reduce structural stress, thereby reduce the tendency of steel ball strain cracking.If the temperature that steel ball takes out from water is higher than 340 ℃, steel ball is too short the cooling time in water, may cause austenite decomposition, causes ball hardness not enough; If the temperature that steel ball takes out from water is lower than 280 ℃, steel ball is long the cooling time in water, and martensitic transformation has occurred in water on the top layer of steel ball, can produce larger structural stress, increases the tendency of steel ball strain cracking.
Skin temperature measuring method for steel ball when the quenching-in water, carries out because steel ball cannot utilize contact or infrared measurement of temperature mode in water, needs to adopt experiment to measure.Because the steel ball of different diameter is cooled to the asynchronism(-nization) of said temperature scope, calculating shows, for the ball workpiece of high-carbon, supposing to open the temperature of quenching is 820 ℃, water temperature is 45 ℃, and in water, cooling speed can be calculated cooling time by 2.5mm/s, and for example the cooling time of diameter 100mm steel ball in water is 40s, diameter 120mm steel ball cooling time is 48s, and diameter 150mm steel ball cooling time is 60s etc.
Because the C content of steel ball in the present invention is up to 0.90-1.05%, after Overheating Treatment, the following certain depth in steel ball top layer and top layer can obtain sufficiently high hardness, adopt above-mentioned double quenching technique can also improve the toughness plasticity of steel ball, make steel ball obtain good integrated performance index.
When steel ball be cooled to 280-340 ℃ and from water, take out after, the water on steel ball top layer will be evaporated to water vapour and diffuse in air in 1-2s, now, steel ball can be dropped into rapidly in No. 10 machine oil of 30-50 ℃ and continue rolling quenching.The reason that double quenching is set to 1-2s interval time is if steel ball overstand in air, because the temperature of steel ball heart portion is higher than steel ball top layer, logical heat transfer raises rapidly steel ball skin temperature, causes finished product steel ball lower hardness, is unfavorable for improving the polishing machine of steel ball; If the residence time is too short, the unevaporated water in steel ball top layer will be brought in oil groove, cause and splash, and meanwhile, in long-term production, the moisture that steel ball is brought into will reduce degree of cleaning and the work-ing life of quenching machine oil, improves production cost.Then, when the skin temperature of steel ball is down to below 60 ℃, steel ball is taken out from machine oil oil groove.
Finally, the mechanical blazing-off that the steel ball after quench treatment is placed in to 200-240 ℃ is not less than 4h, is preferably 4-6h, treats that steel ball air cooling can obtain finished product steel ball to normal temperature and through finishing processing after tempering.In order to remove in time quenching stress, prevent from bursting, should to the steel ball after quenching, carry out tempering in time.Concrete, tempering medium is 50-100 machinery oil.
The high-carbon microalloying steel ball that adopts above-mentioned production technique manufacture contain by weight the C of 0.90-1.05%, the Mn of the Si of 0.30-0.70%, 0.80-1.20%, the Fe of the Cr of 0.25-0.40% and surplus and inevitably impurity, and alloy consumption and the production cost of above-mentioned high-carbon microalloying steel ball significantly reduce, steel ball surface hardness can reach 60-64HRC, centre hardness can reach 56-60HRC, and non-notch sample impelling strength is not less than 14J.Meanwhile, effectively avoided the cracking that causes because internal stress is excessive, in use procedure, broken rate of grinding ball significantly reduces.
The production technique of high-carbon microalloying steel ball of the present invention is described below by embodiment.
embodiment mono-
After the operations such as employing converter smelting, the refining of LF stove, continuous casting, strand cleaning, strand heating, square steel rolling, obtain the steel ball base that comprises following chemical composition: the Fe of C:1.02%, Si:0.55%, Mn:0.92%, Cr:0.30% and surplus and inevitably impurity.Adopt gas-fired furnace by steel ball base be warming up to rapidly 1200 ℃ and be incubated 10min after to take out die forging in 500kg air hammer be the steel ball of diameter 100mm, when steel ball skin temperature is down to 835 ℃, dropping in the Rinsing Area of 35 ℃ continuous rolling quenches after about 38s and takes out, now the skin temperature of steel ball is about 310 ℃, rapid again by after rolling quenching 40s in No. 10 high-speed engine oils of 45 ℃ of steel ball inputs in 2s, now the skin temperature of steel ball is 55 ℃, again steel ball is taken out to No. 50 mechanical blazing-off that are placed in 220 ℃, tempering time is 4h, take out after steel ball air cooling to room temperature and carry out finishing and process and obtain finished product steel ball.Through check, under finished product steel ball top layer, the hardness at 2mm place is that 64HRC, centre of sphere hardness are 60HRC, and the non-notch impelling strength at centre of sphere position is 14J.
embodiment bis-
After the operations such as employing converter smelting, the refining of LF stove, continuous casting, strand cleaning, strand heating, square steel rolling, obtain the steel ball base that comprises following chemical composition: the Fe of C:0.95%, Si:0.61%, Mn:0.88%, Cr:0.35% and surplus and inevitably impurity.Adopt gas-fired furnace by steel ball base be warming up to rapidly 1230 ℃ and be incubated 9min after to take out die forging in 500kg air hammer be the steel ball of diameter 100mm, when steel ball skin temperature is down to 812 ℃, dropping in the Rinsing Area of 42 ℃ continuous rolling quenches after about 43s and takes out, now the skin temperature of steel ball is about 297 ℃, rapid again by after rolling quenching 40s in No. 10 high-speed engine oils of 48 ℃ of steel ball inputs in 2s, now the skin temperature of steel ball is 57 ℃, again steel ball is taken out to No. 50 mechanical blazing-off that are placed in 220 ℃, tempering time is 4.5h, take out after steel ball air cooling to room temperature and carry out finishing and process and obtain finished product steel ball.Through check, under finished product steel ball top layer, the hardness at 2mm place is that 62HRC, centre of sphere hardness are 59HRC, and the non-notch impelling strength at centre of sphere position is 16J.
embodiment tri-
After the operations such as employing converter smelting, the refining of LF stove, continuous casting, strand cleaning, strand heating, square steel rolling and scale sawing, obtain the steel ball base that comprises following chemical composition: the Fe of C:0.98%, Si:0.55%, Mn:1.05%, Cr:0.35% and surplus and inevitably impurity.Adopt gas-fired furnace by steel ball base be warming up to rapidly 1220 ℃ and be incubated 10min after to take out die forging in 500kg air hammer be the steel ball of diameter 120mm, when steel ball skin temperature is down to 820 ℃, dropping in the Rinsing Area of 40 ℃ continuous rolling quenches after about 50s and takes out, now the skin temperature of steel ball is about 290 ℃, rapid again by after rolling quenching 50s in No. 10 high-speed engine oils of 35 ℃ of steel ball inputs in 2s, now the skin temperature of steel ball is 52 ℃, again steel ball is taken out to No. 50 mechanical blazing-off that are placed in 220 ℃, tempering time is 5h, take out after steel ball air cooling to room temperature and carry out finishing and process and obtain finished product steel ball.Through check, under finished product steel ball top layer, the hardness at 2mm place is that 63HRC, centre of sphere hardness are 58HRC, and the non-notch impelling strength at centre of sphere position is 15J.
embodiment tetra-
After the operations such as employing converter smelting, the refining of LF stove, continuous casting, strand cleaning, strand heating, square steel rolling and scale sawing, obtain the steel ball base that comprises following chemical composition: the Fe of C:1.00%, Si:0.49%, Mn:0.98%, Cr:0.39% and surplus and inevitably impurity.Adopt gas-fired furnace by steel ball base be warming up to rapidly 1210 ℃ and be incubated 10min after to take out die forging in 500kg air hammer be the steel ball of diameter 120mm, when steel ball skin temperature is down to 806 ℃, dropping in the Rinsing Area of 48 ℃ continuous rolling quenches after about 55s and takes out, now the skin temperature of steel ball is about 286 ℃, rapid again by after rolling quenching 52s in No. 10 high-speed engine oils of 41 ℃ of steel ball inputs in 2s, now the skin temperature of steel ball is 56 ℃, again steel ball is taken out to No. 50 mechanical blazing-off that are placed in 220 ℃, tempering time is 5.5h, take out after steel ball air cooling to room temperature and carry out finishing and process and obtain finished product steel ball.Through check, under finished product steel ball top layer, the hardness at 2mm place is that 62HRC, centre of sphere hardness are 59HRC, and the non-notch impelling strength at centre of sphere position is 18J.
embodiment five
After the operations such as employing converter smelting, the refining of LF stove, continuous casting, strand cleaning, strand heating, square steel rolling and scale sawing, obtain the steel ball base that comprises following chemical composition: the Fe of C:0.96%, Si:0.52%, Mn:1.13%, Cr:0.38% and surplus and inevitably impurity.Adopt gas-fired furnace by steel ball base be warming up to rapidly 1240 ℃ and be incubated 15min after to take out die forging in 500kg air hammer be the steel ball of diameter 150mm, when steel ball skin temperature is down to 810 ℃, dropping in the Rinsing Area of 42 ℃ continuous rolling quenches after about 65s and takes out, now the skin temperature of steel ball is about 315 ℃, rapid again by after rolling quenching 80s in No. 10 high-speed engine oils of 40 ℃ of steel ball inputs in 2s, now the skin temperature of steel ball is 50 ℃, again steel ball is taken out to No. 50 mechanical blazing-off that are placed in 220 ℃, tempering time is 6h, take out after steel ball air cooling to room temperature and carry out finishing and process and obtain finished product steel ball.Through check, under finished product steel ball top layer, the hardness at 2mm place is that 61HRC, centre of sphere hardness are 56HRC, and the non-notch impelling strength at centre of sphere position is 20J.
embodiment six
After the operations such as employing converter smelting, the refining of LF stove, continuous casting, strand cleaning, strand heating, square steel rolling and scale sawing, obtain the steel ball base that comprises following chemical composition: the Fe of C:0.92%, Si:0.61%, Mn:1.07%, Cr:0.36% and surplus and inevitably impurity.Adopt gas-fired furnace by steel ball base be warming up to rapidly 1225 ℃ and be incubated 15min after to take out die forging in 500kg air hammer be the steel ball of diameter 150mm, when steel ball skin temperature is down to 818 ℃, dropping in the Rinsing Area of 45 ℃ continuous rolling quenches after about 68s and takes out, now the skin temperature of steel ball is about 307 ℃, rapid again by after rolling quenching 84s in No. 10 high-speed engine oils of 45 ℃ of steel ball inputs in 2s, now the skin temperature of steel ball is 52 ℃, again steel ball is taken out to No. 50 mechanical blazing-off that are placed in 220 ℃, tempering time is 6h, take out after steel ball air cooling to room temperature and carry out finishing and process and obtain finished product steel ball.Through check, under finished product steel ball top layer, the hardness at 2mm place is that 62HRC, centre of sphere hardness are 57HRC, and the non-notch impelling strength at centre of sphere position is 16J.
comparative example one
Domestic certain factory's steel ball base has following chemical composition: C:0.80%, Si:0.75%, Mn:0.95%, Cr:0.70%, V:0.10%, Mo:0.10%, Al:0.04%, surplus is Fe and other residual element, adopt gas-fired furnace by steel ball base be warming up to rapidly 1200 ℃ and be incubated 15min after to take out die forging in 500kg air hammer be diameter 100mm steel ball, when steel ball skin temperature is down to 830 ℃, dropping in 38 ℃ of Rinsing Areas the continuous rolling steel ball skin temperature after about 60s of quenching is 75 ℃, taking-up is placed on the 50# machinery blazing-off of 220 ℃, tempering time 4h, after taking-up, carry out finishing processing.Through check, under rail top layer, 2mm place hardness is that 63HRC, centre of sphere hardness are 59HRC, centre of sphere position non-notch impelling strength 15J.
comparative example two
Domestic certain factory's steel ball base has following chemical composition: C:0.78%, Si:0.69%, Mn:1.01%, Cr:0.68%, V:0.09%, Mo:0.12%, Al:0.03%, surplus is Fe and other residual element, adopt gas-fired furnace by steel ball base be warming up to rapidly 1210 ℃ and be incubated 15min after to take out die forging in 500kg air hammer be diameter 120mm steel ball, when steel ball skin temperature is down to 830 ℃, dropping in 41 ℃ of Rinsing Areas the continuous rolling steel ball skin temperature after about 80s of quenching is 70 ℃, taking-up is placed on the 50# machinery blazing-off of 220 ℃, tempering time 5h, after taking-up, carry out finishing processing.Through check, under rail top layer, 2mm place hardness is that 64HRC, centre of sphere hardness are 57HRC, centre of sphere position non-notch impelling strength 14J.
comparative example three
Domestic certain factory's steel ball base has following chemical composition: C:0.81%, Si:0.77%, Mn:0.99%, Cr:0.74%, V:0.12%, Mo:0.10%, Al:0.04%, surplus is Fe and other residual element, adopt gas-fired furnace by steel ball base be warming up to rapidly 1230 ℃ and be incubated 15min after to take out die forging in 500kg air hammer be diameter 150mm steel ball, when steel ball skin temperature is down to 830 ℃, dropping in 41 ℃ of Rinsing Areas the continuous rolling steel ball skin temperature after about 105s of quenching is 85 ℃, taking-up is placed on the 50# machinery blazing-off of 220 ℃, tempering time 6h, after taking-up, carry out finishing processing.Through check, under rail top layer, 2mm place hardness is that 60HRC, centre of sphere hardness are 56HRC, centre of sphere position non-notch impelling strength 16J.
In sum, the production technique of high-carbon microalloying steel ball of the present invention not only can effectively be avoided steel ball quenching cracking, and the high-carbon microalloying steel ball obtaining has identical performance with existing high-carbon high-alloy steel ball, alloy content and production cost significantly reduce, and have splendid dissemination.
Although specifically described high-carbon microalloying steel ball of the present invention and production technique thereof, those skilled in the art will appreciate that without departing from the spirit and scope of the present invention, can make various forms of changes to the present invention.
Claims (9)
1. a production technique for high-carbon microalloying steel ball, is characterized in that, described production technique comprises the following steps:
Steel ball base is heated to be forged to after 1200-1250 ℃ to the steel ball of desired size;
The skin temperature that steel ball is chilled in advance to steel ball is 800-850 ℃;
Steel ball is dropped into after the skin temperature that is quenched to steel ball in the clear water of 30-60 ℃ is down to 280-340 ℃ and take out;
After the 1-2s of interval, steel ball being dropped into the surface temperature that is quenched to steel ball in the machine oil of 30-50 ℃ is down to below 60 ℃;
Take out steel ball and be placed in the mechanical blazing-off of 200-240 ℃ and be not less than 4 hours;
Take out steel ball, through finishing, process and can obtain finished product steel ball,
Wherein, by weight percentage, the Si of C, 0.30-0.70% that described steel ball base contains 0.90-1.05% is, the Cr of the Mn of 0.80-1.20%, 0.25-0.39% and the Fe of surplus and inevitably impurity.
2. the production technique of high-carbon microalloying steel ball according to claim 1, is characterized in that, adopts the operational path of converter smelting, secondary refining, continuous casting to manufacture described steel ball base.
3. the production technique of high-carbon microalloying steel ball according to claim 1 and 2, is characterized in that, described steel ball base is that cross dimensions is the billet of 60mm * 60mm-75mm * 75mm.
4. the production technique of high-carbon microalloying steel ball according to claim 3, is characterized in that, the diameter of described steel ball is 100-150mm.
5. the production technique of high-carbon microalloying steel ball according to claim 1, is characterized in that, described steel ball needs ceaselessly to roll continuously when clear water or machine oil quenching.
6. the production technique of high-carbon microalloying steel ball according to claim 1, is characterized in that, described machine oil is No. 10 machine oil.
7. the production technique of high-carbon microalloying steel ball according to claim 1, is characterized in that, described machinery oil is 50-100 machinery oil.
8. the production technique of high-carbon microalloying steel ball according to claim 1, is characterized in that, described steel ball base is heated to the step of 1200-1250 ℃ is also included in before forging is that the steel ball base insulation of 1200-1250 ℃ is more than 10 minutes by temperature.
9. a high-carbon microalloying steel ball, is characterized in that, described high-carbon microalloying steel ball adopts production technique as claimed in any of claims 1 to 8 in one of claims to make.
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| CN104985095B (en) * | 2015-07-20 | 2017-01-04 | 江阴东邦钢球机械有限公司 | Ball rolling technique |
| CN104975148B (en) * | 2015-07-20 | 2018-06-19 | 江阴东邦钢球机械有限公司 | A kind of method of steel ball or the double quenching of steel forging |
| CN107955904A (en) * | 2017-11-30 | 2018-04-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Steel bar and its production method are built containing V, Nb, Ti microalloy |
| CN112176260B (en) * | 2020-09-30 | 2021-11-23 | 江苏钰特耐磨科技有限公司 | Steel for rolling steel balls with ultrahigh carbon and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102418044A (en) * | 2011-11-15 | 2012-04-18 | 攀钢集团研究院有限公司 | Steel for steel balls and method for manufacturing steel balls |
| CN102443741A (en) * | 2011-11-15 | 2012-05-09 | 攀钢集团工程技术有限公司 | Steel ball for ball mill and manufacturing method for same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102418044A (en) * | 2011-11-15 | 2012-04-18 | 攀钢集团研究院有限公司 | Steel for steel balls and method for manufacturing steel balls |
| CN102443741A (en) * | 2011-11-15 | 2012-05-09 | 攀钢集团工程技术有限公司 | Steel ball for ball mill and manufacturing method for same |
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