CN102758140A - 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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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
For of the manufacturing of forging rolling waste heat class ball mill with steel ball; The staple of steel ball adopts the C content of 0.60-0.85% usually at present; And add suitable Si, Mn element; Simultaneously, in steel ball, be aided with elements such as adding proper C r, Mo, Ni, Cu, V, Nb, with hardness, abrasion resistance properties and the corrosion resistance nature etc. of raising steel ball according to the diameter of steel ball and to the demands of different of steel ball top layer and centre hardness difference.
Carbon is cheap, the most effective strengthening element in the steel; But if further improve the carbon content in the steel ball; With steel ball is ftractureed in the quenching process of single quenchants such as clear water, cause steel ball to use, limited the raising of carbon content in the steel ball thus; And alloying element causes the manufacturing cost of high-performance steel ball and service efficiency to be difficult to effective raising owing to cost an arm and a leg and use can't be reclaimed.
Therefore,, need a kind of production technique badly, reach the effect of instead of steel ball interalloy element that is used for, thereby reach the purpose that improves the steel ball utilization ratio, reduces production costs through thermal treatment process for the steel ball of high-carbon content.
Summary of the invention
To the deficiency that exists in the prior art, the object of the present invention is to provide a kind of production technique, effectively to avoid the hardening break in the steel ball heat treatment process to high-carbon microalloying steel ball.
To achieve these goals, one side of the present invention provides a kind of production technique of high-carbon microalloying steel ball, and said production technique may further comprise the steps: forging was the steel ball of desired size after the steel ball base was heated to 1200-1250 ℃; The skin temperature of steel ball being carried out precooling to steel ball is 800-850 ℃; Steel ball dropped into take out after the skin temperature that is quenched to steel ball in 30-60 ℃ the clear water is reduced to 280-340 ℃; At interval behind the 1-2s steel ball being dropped into the surface temperature that is quenched to steel ball in 30-50 ℃ the machine oil reduces to below 60 ℃; Take out steel ball and place 200-240 ℃ mechanical blazing-off to be not less than 4 hours; Take out steel ball; Can obtain the finished product steel ball through the finishing processing; Wherein, by weight percentage, said steel ball base contains the C of 0.90-1.05%, the Si of 0.30-0.70%, the Mn of 0.80-1.20%, the Cr of 0.25-0.40% and the Fe and the unavoidable impurities of surplus.
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 make said steel ball base.
According to an embodiment of the production technique of high-carbon microalloying steel ball of the present invention, said 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 said steel ball is 100-150mm.
According to an embodiment of the production technique of high-carbon microalloying steel ball of the present invention, when quenching in clear water or machine oil, said steel ball needs ceaselessly to roll continuously.
According to an embodiment of the production technique of high-carbon microalloying steel ball of the present invention, said 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, said machinery oil is the 50-100 machinery oil.
According to an embodiment of the production technique of high-carbon microalloying steel ball of the present invention, said the steel ball base is heated to that 1200-1250 ℃ step also is included in before forging is that 1200-1250 ℃ steel ball base insulation is more than 10 minutes with temperature.
Another aspect of the present invention also provides a kind of high-carbon microalloying steel ball, and said 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, said high-carbon microalloying steel ball contains the C of 0.90-1.05%, the Si of 0.30-0.70%, the Mn of 0.80-1.20%, the Cr of 0.25-0.40% and the Fe and the unavoidable impurities of surplus by weight.
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 problems of bringing for fear of high-carbon content such as steel ball hardening break; Further adopted clear water machine oil double quenching technology, not only can effectively avoid the steel ball hardening break, and the high-carbon microalloying steel ball that is obtained there is identical performance with former high-carbon high-alloy steel ball; Alloy content and production cost significantly reduce, and have splendid dissemination.
Description of drawings
Fig. 1 is the production technique synoptic diagram of high-carbon microalloying steel ball of the present invention.
Embodiment
Describe in detail below in conjunction with the production technique of accompanying drawing high-carbon microalloying steel ball of the present invention.
By weight percentage, the high-carbon microalloying steel ball base that production technique adopted of high-carbon microalloying steel ball of the present invention contains the C of 0.90-1.05%, the Si of 0.30-0.70%, the Mn of 0.80-1.20%, the Cr of 0.25-0.40% and the Fe and the unavoidable impurities of surplus.Wherein, carbon content is higher, and alloying element content is lower.Particularly, when making this steel ball base, can adopt the operational path manufacturing of converter smelting, secondary refining, continuous casting.In order to obtain the steel ball of desired size; Also need carry out the billet that scale cuts post-heating and is rolled into certain size to the steel ball base; 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 synoptic 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 steps, at first, forges after the steel ball base is heated to 1200-1250 ℃ and is the steel ball of desired size.Forging is the necessary operation for the steel ball that obtains required diameter or shape; Forging general 250kg of employing or 500kg air hammer at present accomplishes; If Heating temperature is above 1250 ℃; The autstenitic grain size of steel ball base will have significantly grows up even trend overheated, overbumt, is unfavorable for the steel ball final properties; If forge after Heating temperature is lower than 1200 ℃, then final forging temperature is low excessively, and resistance to deformation increases, and is unfavorable for improving the circularity of steel ball.
The skin temperature of steel ball being carried out precooling to steel ball is 800-850 ℃.Usually, the temperature behind the steel ball finish-forging is approximately 900-950 ℃, if directly quench this moment; On the one hand because the higher thermal stresses that causes of thermal capacitance is excessive; Steel ball easy of crack and cause brokenly ball, 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; Former need are 800-850 ℃ to the surface temperature that steel ball carries out precooling to steel ball, raising of steel ball performance after this will help quenching.Usually, directly place the bottom to have on the stand of through hole the steel ball after forging and carry out precooling.
Afterwards, steel ball is dropped into to take out after the skin temperature that is quenched to steel ball in 30-60 ℃ the clear water is reduced to 280-340 ℃.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 continuous production is constant in 30-60 ℃ of scope.At interval behind the 1-2s steel ball being dropped into the surface temperature that is quenched to steel ball in 30-50 ℃ the machine oil reduces to below 60 ℃.Be noted that, need when steel ball quenches in clear water or machine oil ceaselessly to roll continuously, 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 technology different from the past, and adopts the double quenching technology of oil behind the first water, improves the performance of steel ball through meticulous operation, and then reduces the alloy content and the final production cost that reduces steel ball of steel ball.
Particularly; The TR that changes quenchant is chosen to be 280-340 ℃ reason and is: because the cooling power of clear water is very strong; The steel ball that is in the austenite phase region needs in clear water, to be quickly cooled to the temperature of ordering near Ms, to avoid supercooled austenite generation perlite and bainite transformation.And the cooling power of No. 10 machine oil is weaker than clear water, after clear water quenches, quenches with machine oil again, can make steel ball in machine oil, continue cooling; Guarantee that supercooled austenite is slowly changing martensite under the cooling conditions; Adopt above-mentioned double quenching technology both can guarantee that steel ball obtained martensitic stucture, improve the hardness and the abrasion resistance properties of steel ball, can reduce the speed of cooling of steel ball again in the 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 ℃, then steel ball is too short the cooling time in water, possibly cause that austenite decomposes, and causes ball hardness not enough; If the temperature that steel ball takes out from water is lower than 280 ℃, then steel ball is long the cooling time in water, and martensitic transformation has taken place in water on the top layer of steel ball, can produce bigger structural stress, increases the tendency of steel ball strain cracking.
For the skin temperature measuring method of steel ball when the quenching-in water,, need to adopt experiment to measure because steel ball can't utilize contact or infrared measurement of temperature mode to carry out in water.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 refrigerative speed can 2.5mm/s be calculated cooling time in water, 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 is up to 0.90-1.05% among the present invention; Then the following certain depth in steel ball top layer and top layer can obtain sufficiently high hardness after bakingout process; Adopt above-mentioned double quenching technology can also improve the toughness plasticity of steel ball, make steel ball obtain the excellent comprehensive performances 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 the air in 1-2s, at this moment, can steel ball be dropped into rapidly in 30-50 ℃ No. 10 machine oil and continue rolling quenching.The reason that double quenching is set to 1-2s pitch time is if steel ball overstand in air; Because the temperature of steel ball heart portion is higher than the steel ball top layer; Raise rapidly through the heat passage steel ball skin temperature that makes, cause the finished product ball hardness on the low side, be unfavorable for improving the polishing machine of steel ball; If the residence time is too short, then the unevaporated water in steel ball top layer will be brought in the oil groove, cause to splash, and simultaneously, in long-term production, the moisture that steel ball is brought into will reduce the degree of cleaning and the work-ing life of quenching machine oil, improve production cost.Then, when the skin temperature of steel ball is reduced to below 60 ℃, steel ball is taken out from the machine oil oil groove.
At last, place 200-240 ℃ mechanical blazing-off to be not less than 4h the steel ball after the quench treatment, be preferably 4-6h, treat steel ball air cooling to normal temperature after the tempering and can obtain the finished product steel ball through the finishing processing.In order in time to remove quenching stress, prevent to burst, should in time carry out tempering to the steel ball after quenching.Concrete, tempering medium is the 50-100 machinery oil.
Adopt the high-carbon microalloying steel ball of above-mentioned production technique manufacturing to contain the C of 0.90-1.05%, the Si of 0.30-0.70%, the Mn of 0.80-1.20%, the Cr of 0.25-0.40% and the Fe and the unavoidable impurities of surplus by weight; And the 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.Simultaneously, effectively avoided the cracking that causes because of internal stress is excessive, broken rate of grinding ball significantly reduces in the use.
The production technique of high-carbon microalloying steel ball of the present invention is described through embodiment below.
Embodiment one
Obtain comprising the steel ball base of following chemical ingredients after the operations such as employing converter smelting, the refining of LF stove, continuous casting, strand cleaning, strand heat, square steel is rolling: the Fe of C:1.02%, Si:0.55%, Mn:0.92%, Cr:0.30% and surplus and unavoidable impurities.Adopt gas-fired furnace with the steel ball base be warming up to rapidly 1200 ℃ and be incubated 10min after take out that die forging is the steel ball of diameter 100mm in the 500kg air hammer; Treating when the steel ball skin temperature is reduced to 835 ℃ to drop in 35 ℃ the Rinsing Area continuous rolling quenches and takes out behind about 38s; This moment, the skin temperature of steel ball was about 310 ℃; Rapidly again with behind the rolling quenching 40s in No. 10 high-speed engine oils of 45 ℃ of steel ball inputs, this moment, the skin temperature of steel ball was 55 ℃ in 2s, steel ball is taken out place 220 ℃ No. 50 mechanical blazing-off again; Tempering time is 4h, takes out behind the steel ball air cooling to room temperature and carries out finishing and handle and obtain the finished product steel ball.Through check, the hardness at 2mm place is that 64HRC, centre of sphere hardness are 60HRC under the finished product steel ball top layer, and the non-notch impelling strength at centre of sphere position is 14J.
Embodiment two
Obtain comprising the steel ball base of following chemical ingredients after the operations such as employing converter smelting, the refining of LF stove, continuous casting, strand cleaning, strand heat, square steel is rolling: the Fe of C:0.95%, Si:0.61%, Mn:0.88%, Cr:0.35% and surplus and unavoidable impurities.Adopt gas-fired furnace with the steel ball base be warming up to rapidly 1230 ℃ and be incubated 9min after take out that die forging is the steel ball of diameter 100mm in the 500kg air hammer; Treating when the steel ball skin temperature is reduced to 812 ℃ to drop in 42 ℃ the Rinsing Area continuous rolling quenches and takes out behind about 43s; This moment, the skin temperature of steel ball was about 297 ℃; Rapidly again with behind the rolling quenching 40s in No. 10 high-speed engine oils of 48 ℃ of steel ball inputs, this moment, the skin temperature of steel ball was 57 ℃ in 2s, steel ball is taken out place 220 ℃ No. 50 mechanical blazing-off again; Tempering time is 4.5h, takes out behind the steel ball air cooling to room temperature and carries out finishing and handle and obtain the finished product steel ball.Through check, the hardness at 2mm place is that 62HRC, centre of sphere hardness are 59HRC under the finished product steel ball top layer, and the non-notch impelling strength at centre of sphere position is 16J.
Embodiment three
Adopt converter smelting, the refining of LF stove, continuous casting, strand cleaning, strand heating, square steel is rolling and operation such as scale sawing after obtain comprising the steel ball base of following chemical ingredients: the Fe of C:0.98%, Si:0.55%, Mn:1.05%, Cr:0.35% and surplus and unavoidable impurities.Adopt gas-fired furnace with the steel ball base be warming up to rapidly 1220 ℃ and be incubated 10min after take out that die forging is the steel ball of diameter 120mm in the 500kg air hammer; Treating when the steel ball skin temperature is reduced to 820 ℃ to drop in 40 ℃ the Rinsing Area continuous rolling quenches and takes out behind about 50s; This moment, the skin temperature of steel ball was about 290 ℃; Rapidly again with behind the rolling quenching 50s in No. 10 high-speed engine oils of 35 ℃ of steel ball inputs, this moment, the skin temperature of steel ball was 52 ℃ in 2s, steel ball is taken out place 220 ℃ No. 50 mechanical blazing-off again; Tempering time is 5h, takes out behind the steel ball air cooling to room temperature and carries out finishing and handle and obtain the finished product steel ball.Through check, the hardness at 2mm place is that 63HRC, centre of sphere hardness are 58HRC under the finished product steel ball top layer, and the non-notch impelling strength at centre of sphere position is 15J.
Embodiment four
Adopt converter smelting, the refining of LF stove, continuous casting, strand cleaning, strand heating, square steel is rolling and operation such as scale sawing after obtain comprising the steel ball base of following chemical ingredients: the Fe of C:1.00%, Si:0.49%, Mn:0.98%, Cr:0.39% and surplus and unavoidable impurities.Adopt gas-fired furnace with the steel ball base be warming up to rapidly 1210 ℃ and be incubated 10min after take out that die forging is the steel ball of diameter 120mm in the 500kg air hammer; Treating when the steel ball skin temperature is reduced to 806 ℃ to drop in 48 ℃ the Rinsing Area continuous rolling quenches and takes out behind about 55s; This moment, the skin temperature of steel ball was about 286 ℃; Rapidly again with behind the rolling quenching 52s in No. 10 high-speed engine oils of 41 ℃ of steel ball inputs, this moment, the skin temperature of steel ball was 56 ℃ in 2s, steel ball is taken out place 220 ℃ No. 50 mechanical blazing-off again; Tempering time is 5.5h, takes out behind the steel ball air cooling to room temperature and carries out finishing and handle and obtain the finished product steel ball.Through check, the hardness at 2mm place is that 62HRC, centre of sphere hardness are 59HRC under the finished product steel ball top layer, and the non-notch impelling strength at centre of sphere position is 18J.
Embodiment five
Adopt converter smelting, the refining of LF stove, continuous casting, strand cleaning, strand heating, square steel is rolling and operation such as scale sawing after obtain comprising the steel ball base of following chemical ingredients: the Fe of C:0.96%, Si:0.52%, Mn:1.13%, Cr:0.38% and surplus and unavoidable impurities.Adopt gas-fired furnace with the steel ball base be warming up to rapidly 1240 ℃ and be incubated 15min after take out that die forging is the steel ball of diameter 150mm in the 500kg air hammer; Treating when the steel ball skin temperature is reduced to 810 ℃ to drop in 42 ℃ the Rinsing Area continuous rolling quenches and takes out behind about 65s; This moment, the skin temperature of steel ball was about 315 ℃; Rapidly again with behind the rolling quenching 80s in No. 10 high-speed engine oils of 40 ℃ of steel ball inputs, this moment, the skin temperature of steel ball was 50 ℃ in 2s, steel ball is taken out place 220 ℃ No. 50 mechanical blazing-off again; Tempering time is 6h, takes out behind the steel ball air cooling to room temperature and carries out finishing and handle and obtain the finished product steel ball.Through check, the hardness at 2mm place is that 61HRC, centre of sphere hardness are 56HRC under the finished product steel ball top layer, and the non-notch impelling strength at centre of sphere position is 20J.
Embodiment six
Adopt converter smelting, the refining of LF stove, continuous casting, strand cleaning, strand heating, square steel is rolling and operation such as scale sawing after obtain comprising the steel ball base of following chemical ingredients: the Fe of C:0.92%, Si:0.61%, Mn:1.07%, Cr:0.36% and surplus and unavoidable impurities.Adopt gas-fired furnace with the steel ball base be warming up to rapidly 1225 ℃ and be incubated 15min after take out that die forging is the steel ball of diameter 150mm in the 500kg air hammer; Treating when the steel ball skin temperature is reduced to 818 ℃ to drop in 45 ℃ the Rinsing Area continuous rolling quenches and takes out behind about 68s; This moment, the skin temperature of steel ball was about 307 ℃; Rapidly again with behind the rolling quenching 84s in No. 10 high-speed engine oils of 45 ℃ of steel ball inputs, this moment, the skin temperature of steel ball was 52 ℃ in 2s, steel ball is taken out place 220 ℃ No. 50 mechanical blazing-off again; Tempering time is 6h, takes out behind the steel ball air cooling to room temperature and carries out finishing and handle and obtain the finished product steel ball.Through check, the hardness at 2mm place is that 62HRC, centre of sphere hardness are 57HRC under the finished product steel ball top layer, and the non-notch impelling strength at centre of sphere position is 16J.
Comparative Examples one
Domestic certain factory's steel ball base has following chemical ingredients: 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 with the steel ball base be warming up to rapidly 1200 ℃ and be incubated 15min after take out that die forging is a diameter 100mm steel ball in the 500kg air hammer; Drop in 38 ℃ of Rinsing Areas continuous rolling when treating that the steel ball skin temperature is reduced to 830 ℃ and quench that the steel ball skin temperature is 75 ℃ behind about 60s; Taking-up is placed on 220 ℃ 50# machinery blazing-off, tempering time 4h; Carrying out finishing after the taking-up handles.Through check, 2mm place hardness is that 63HRC, centre of sphere hardness are 59HRC under the rail top layer, centre of sphere position non-notch impelling strength 15J.
Comparative Examples two
Domestic certain factory's steel ball base has following chemical ingredients: 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 with the steel ball base be warming up to rapidly 1210 ℃ and be incubated 15min after take out that die forging is a diameter 120mm steel ball in the 500kg air hammer; Drop in 41 ℃ of Rinsing Areas continuous rolling when treating that the steel ball skin temperature is reduced to 830 ℃ and quench that the steel ball skin temperature is 70 ℃ behind about 80s; Taking-up is placed on 220 ℃ 50# machinery blazing-off, tempering time 5h; Carrying out finishing after the taking-up handles.Through check, 2mm place hardness is that 64HRC, centre of sphere hardness are 57HRC under the rail top layer, centre of sphere position non-notch impelling strength 14J.
Comparative Examples three
Domestic certain factory's steel ball base has following chemical ingredients: 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 with the steel ball base be warming up to rapidly 1230 ℃ and be incubated 15min after take out that die forging is a diameter 150mm steel ball in the 500kg air hammer; Drop in 41 ℃ of Rinsing Areas continuous rolling when treating that the steel ball skin temperature is reduced to 830 ℃ and quench that the steel ball skin temperature is 85 ℃ behind about 105s; Taking-up is placed on 220 ℃ 50# machinery blazing-off, tempering time 6h; Carrying out finishing after the taking-up handles.Through check, 2mm place hardness is that 60HRC, centre of sphere hardness are 56HRC under the rail top layer, 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 the steel ball hardening break; And the high-carbon microalloying steel ball that is obtained 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 under the situation that does not break away from the spirit and scope of the present invention, can make various forms of changes to the present invention.
Claims (10)
1. the production technique of a high-carbon microalloying steel ball is characterized in that, said production technique may further comprise the steps:
Forge after the steel ball base is heated to 1200-1250 ℃ and be the steel ball of desired size;
The skin temperature of steel ball being carried out precooling to steel ball is 800-850 ℃;
Steel ball dropped into take out after the skin temperature that is quenched to steel ball in 30-60 ℃ the clear water is reduced to 280-340 ℃;
At interval behind the 1-2s steel ball being dropped into the surface temperature that is quenched to steel ball in 30-50 ℃ the machine oil reduces to below 60 ℃;
Take out steel ball and place 200-240 ℃ mechanical blazing-off to be not less than 4 hours;
Take out steel ball, handle to obtain the finished product steel ball through finishing,
Wherein, by weight percentage, said steel ball base contains the C of 0.90-1.05%, the Si of 0.30-0.70%, the Mn of 0.80-1.20%, the Cr of 0.25-0.40% and the Fe and the unavoidable impurities of surplus.
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 make said steel ball base.
3. the production technique of high-carbon microalloying steel ball according to claim 1 and 2 is characterized in that, said 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 said steel ball is 100-150mm.
5. the production technique of high-carbon microalloying steel ball according to claim 1 is characterized in that, needs when said steel ball quenches in clear water or machine oil ceaselessly to roll continuously.
6. the production technique of high-carbon microalloying steel ball according to claim 1 is characterized in that, said 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, said machinery oil is the 50-100 machinery oil.
8. the production technique of high-carbon microalloying steel ball according to claim 1 is characterized in that, said the steel ball base is heated to that 1200-1250 ℃ step also is included in before forging is that 1200-1250 ℃ steel ball base insulation is more than 10 minutes with temperature.
9. a high-carbon microalloying steel ball is characterized in that, said high-carbon microalloying steel ball adopts and makes like any described production technique in the claim 1 to 8.
10. high-carbon microalloying steel ball according to claim 9; It is characterized in that said high-carbon microalloying steel ball contains the C of 0.90-1.05%, the Si of 0.30-0.70%, the Mn of 0.80-1.20%, the Cr of 0.25-0.40% and the Fe and the unavoidable impurities of surplus by weight.
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| CN103834773A (en) * | 2012-11-27 | 2014-06-04 | 大连经济技术开发区圣洁真空技术开发有限公司 | Metal quenching method |
| CN103834865A (en) * | 2012-11-21 | 2014-06-04 | 山东兴盛矿业有限责任公司 | Method for forging wear-resistant and corrosion-resistant steel ball |
| CN104611528A (en) * | 2015-02-06 | 2015-05-13 | 桂林理工大学 | Heating method for refined 70# steel austenite grain |
| CN104975148A (en) * | 2015-07-20 | 2015-10-14 | 江阴东邦钢球机械有限公司 | Double-liquid quenching method for steel balls or steel forgings |
| CN104985095A (en) * | 2015-07-20 | 2015-10-21 | 江阴东邦钢球机械有限公司 | Steel ball rolling technology |
| 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 |
| CN112176260A (en) * | 2020-09-30 | 2021-01-05 | 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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| 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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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103834865A (en) * | 2012-11-21 | 2014-06-04 | 山东兴盛矿业有限责任公司 | Method for forging wear-resistant and corrosion-resistant steel ball |
| CN103834773A (en) * | 2012-11-27 | 2014-06-04 | 大连经济技术开发区圣洁真空技术开发有限公司 | Metal quenching method |
| CN103014289A (en) * | 2013-01-09 | 2013-04-03 | 米易华星钒钛科技有限责任公司 | Manufacturing method of forged steel balls |
| CN103014289B (en) * | 2013-01-09 | 2014-04-09 | 米易华星钒钛科技有限责任公司 | Manufacturing method of forged steel balls |
| CN103740898A (en) * | 2014-01-02 | 2014-04-23 | 内蒙古北方重工业集团有限公司 | Pressure quenching method of high-hardness 5Cr13MoV wearable liner |
| CN103740898B (en) * | 2014-01-02 | 2015-07-22 | 内蒙古北方重工业集团有限公司 | Pressure quenching method of high-hardness 5Cr13MoV wearable liner |
| CN104611528A (en) * | 2015-02-06 | 2015-05-13 | 桂林理工大学 | Heating method for refined 70# steel austenite grain |
| CN104975148A (en) * | 2015-07-20 | 2015-10-14 | 江阴东邦钢球机械有限公司 | Double-liquid quenching method for steel balls or steel forgings |
| CN104985095A (en) * | 2015-07-20 | 2015-10-21 | 江阴东邦钢球机械有限公司 | Steel ball rolling technology |
| 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 |
| CN112176260A (en) * | 2020-09-30 | 2021-01-05 | 江苏钰特耐磨科技有限公司 | Steel for rolling steel balls with ultrahigh carbon and preparation method thereof |
| 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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