CN104372250B - Combination process is rolled in a kind of bearing ferrule blanks and its casting - Google Patents
Combination process is rolled in a kind of bearing ferrule blanks and its casting Download PDFInfo
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- CN104372250B CN104372250B CN201410620859.2A CN201410620859A CN104372250B CN 104372250 B CN104372250 B CN 104372250B CN 201410620859 A CN201410620859 A CN 201410620859A CN 104372250 B CN104372250 B CN 104372250B
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- 238000000034 method Methods 0.000 title claims abstract description 45
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- -1 compound rare-earth Chemical class 0.000 claims abstract description 24
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- 229910052748 manganese Inorganic materials 0.000 claims abstract description 12
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 12
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 12
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 12
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 12
- 239000003607 modifier Substances 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims description 45
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- 238000010792 warming Methods 0.000 claims description 22
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- 238000003723 Smelting Methods 0.000 claims description 13
- 229910052684 Cerium Inorganic materials 0.000 claims description 11
- 229910052692 Dysprosium Inorganic materials 0.000 claims description 11
- 229910052693 Europium Inorganic materials 0.000 claims description 11
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 11
- 229910052689 Holmium Inorganic materials 0.000 claims description 11
- 229910052779 Neodymium Inorganic materials 0.000 claims description 11
- 229910052777 Praseodymium Inorganic materials 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 claims description 11
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 claims description 11
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 claims description 11
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 claims description 11
- KJZYNXUDTRRSPN-UHFFFAOYSA-N holmium atom Chemical compound [Ho] KJZYNXUDTRRSPN-UHFFFAOYSA-N 0.000 claims description 11
- 229910052746 lanthanum Inorganic materials 0.000 claims description 11
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 11
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims description 11
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 claims description 11
- 238000010791 quenching Methods 0.000 claims description 11
- 230000000171 quenching effect Effects 0.000 claims description 11
- 229910052727 yttrium Inorganic materials 0.000 claims description 11
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 11
- 239000000440 bentonite Substances 0.000 claims description 10
- 229910000278 bentonite Inorganic materials 0.000 claims description 10
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 10
- 239000003110 molding sand Substances 0.000 claims description 10
- 235000019353 potassium silicate Nutrition 0.000 claims description 10
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 10
- 239000006004 Quartz sand Substances 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 8
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- 230000001143 conditioned effect Effects 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000000470 constituent Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
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- 241001417490 Sillaginidae Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
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- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 201000001371 inclusion conjunctivitis Diseases 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
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- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
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- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
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- 238000007493 shaping process Methods 0.000 description 1
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- 206010044325 trachoma Diseases 0.000 description 1
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- Rolling Contact Bearings (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a kind of bearing ferrule blanks, component is the bearing ferrule blanks by mass percentage：C：0.40 0.45%, Mn：0.80 1.00%, Si：0.35 0.55%, Cr：0.95 1.25%, Mo：0.20 0.30%, P：0.03 0.05%, Ti：0.08 0.10%, Al：0.20 0.23%, V:0.10 0.20%, Ni≤0.30%, Cu≤0.25%, S≤0.02%, compound rare-earth：0.12 0.14%, surplus Fe；The casting rolling combination process flow that the present invention also designs a kind of bearing ferrule blanks is metallurgy and foundry rolling normalizing modifier treatment Vehicle Processing；The bearing ferrule blanks high mechanical properties, quality are high, and casting rolling combination process reduces the manufacturing procedure of blank, reduces production cost.
Description
Technical field
The present invention relates to a kind of casting of metallic article to roll over combination process, and in particular to a kind of casting of bearing ferrule blanks is rolled over multiple
Close technique.
Background technology
Ring, the conventional method such as bearing ring of production high quality are two kinds of cold rolling and hot rolling at present.Cold rolling
Method is to carry out rolling at room temperature using forging stock, although this method quality is easily guaranteed that, singly needs rolling power big, is only applicable to
The processing of small-sized ring.And relative hot rolling method is usually used in the production of large ring, but for the production of large ring,
Due to needing to carry out descale and punching using the hot rolling of forging, and allowance is big, causes artificial and material waste.
At present, bearing industry uses blank of the 42CrMo steel annulars forging as super large type bearing ring, bearer ring more
The processing process of shape Forging is:Steel-making-ingot casting-excision ingot casting cap mouth and afterbody-ingot casting heating-forging-upsetting cake-reaming-
Reheating rolling, the manufacturing procedure of forging blank is more, and cost is high, and the bearing ring quality prepared is low, poor performance, research and development
It is a kind of that bearing ferrule blanks of disadvantages described above and preparation method thereof can be overcome to be referred to as those skilled in the art's technology urgently to be resolved hurrily
Problem.
The content of the invention
The technical problems to be solved by the invention are the shortcomings that presence for above prior art, to propose a kind of bearing holder (housing, cover)
Enclose blank and its combination process is rolled in casting, the bearing ferrule blanks high mechanical properties, quality are high, reduce bearing ferrule blanks surface
Shrinkage cavity and porosity, segregation the defects of, and combination process is rolled in the casting reduces the manufacturing procedure of blank, reduces production cost.
The present invention solve above technical problem technical scheme be：
A kind of bearing ferrule blanks, component is the bearing ferrule blanks by mass percentage：C：0.40-0.45%, Mn：
0.80-1.00%, Si：0.35-0.55%, Cr：0.95-1.25%, Mo：0.20-0.30%, P：0.03-0.05%, Ti：0.08-
0.10%, Al：0.20-0.23%, V:0.10-0.20%, Ni≤0.30%, Cu≤0.25%, S≤0.02%, compound rare-earth：0.12-
0.14%, surplus Fe；
Compound rare-earth includes following components by mass percentage：Lanthanum：25-30%, praseodymium：15-18%, dysprosium：11-14%, holmium：5-
8%, gadolinium：8-10%, yttrium：8-10%, cerium：8-11%, neodymium：7-9%, europium：5-10%, above each component sum are 100%.
The technical scheme that further limits of the present invention is：
In aforementioned bearings collar blank, component is the bearing ferrule blanks by mass percentage：C：0.40%, Mn：1.00%,
Si：0.45%, Cr：1.25%, Mo：0.20%, P：0.05%, Ti：0.09%, Al：0.20%, V:0.20%, Ni：0.30%, Cu：
0.20%, S：0.02%, compound rare-earth：0.12%, surplus Fe；
Compound rare-earth includes following components by mass percentage：Lanthanum：25%, praseodymium：16%, dysprosium：13%, holmium：6%, gadolinium：9%,
Yttrium：9%, cerium：9%, neodymium：8%, europium：5%.
In aforementioned bearings collar blank, component is the bearing ferrule blanks by mass percentage：C：0.45%, Mn：0.80%,
Si：0.35%, Cr：1.00%, Mo：0.25%, P：0.04%, Ti：0.08%, Al：0.23%, V:0.10%, Ni：0.20%, Cu：
0.15%, S：0.01%, compound rare-earth：0.14%, surplus Fe；
Compound rare-earth includes following components by mass percentage：Lanthanum：25%, praseodymium：18%, dysprosium：11%, holmium：7%, gadolinium：8%,
Yttrium：8%, cerium：8%, neodymium：8%, europium：7%.
In aforementioned bearings collar blank, component is the bearing ferrule blanks by mass percentage：C：0.42%, Mn：0.9%,
Si：0.55%, Cr：0.95%, Mo：0.30%, P：0.03%, Ti：0.10%, Al：0.21%, V:0.15%, Ni：0.15%, Cu：
0.25%, S：0.015 %, compound rare-earth：0.13%, surplus Fe；
Compound rare-earth includes following components by mass percentage：Lanthanum：30%, praseodymium：15%, dysprosium：11%, holmium：5%, gadolinium：8%,
Yttrium：8%, cerium：8%, neodymium：7%, europium：8%.
Combination process is rolled in the casting that the present invention have also been devised a kind of bearing ferrule blanks, has operating procedure as follows：
（1）Be blended casting mold using molding sand, and casting mold delivered in baker carry out drying at 200-210 DEG C it is stand-by；
Molding sand includes following components by mass percentage：Waterglass 8-11%, bentonite：1-2%, remaining is quartz sand；
（2）Above-mentioned chemical constituent is delivered into electric arc furnaces to be smelted to obtain molten steel, smelting temperature is 1680-1700 DEG C, smelting
4-4.5h is refined, the molten steel of smelting is poured into ladle, calm 3-8min to molten steel temperature is 1570-1580 DEG C, then by molten steel
Implantation step（1）In casting mold in obtain bearing ring casting, pouring temperature is 1570-1580 DEG C, and poring rate is controlled in 65-
70kg/s, 15-20s is poured into a mould, the casting mold for being cast with molten steel is incubated 20-21h, treats that bearing ring casting is cooled to 450-500 DEG C
Shi Jinhang cuts dead head；
（3）By step（2）In bearing ring casting be heated to 1150-1200 DEG C, firing rate is 120-130 DEG C/h,
Rolling is carried out after insulation 4-5h, it is 50-150t to roll over machine axial rolling force, and radial rolling power is 100-250t；
（4）Bearing ring casting after rolling is subjected to normalized treatment, it is specific as follows：
550-600 DEG C is warming up to 30-70 DEG C/h firing rate, is incubated 0.5-0.8h, then the speed with 50-80 DEG C/h
850-900 DEG C is warming up to, it is air-cooled to room temperature to coming out of the stove after 7-8h to continue insulation；
（5）Bearing ring casting after normalized treatment is subjected to modifier treatment, it is specific as follows：
550-600 DEG C is warming up to 30-70 DEG C/h firing rate, is incubated 0.5-0.8h, then the speed with 50-80 DEG C/h
850-880 DEG C is warming up to, quenching of being come out of the stove after insulation 2.5-3h, is tempered in time after quenching, with 20-30 DEG C/h firing rate
500-550 DEG C is warming up to, is incubated 5-6h, cooling of coming out of the stove；
（6）To step（5）In bearing ring casting after conditioned heat treatment be down to room temperature through refrigerating work procedure, and to being down to
The bearing ring casting of room temperature is polished and is machined, and finally gives bearing ferrule blanks.
The technical scheme that further limits of the present invention is：
The casting of aforementioned bearings collar blank is rolled in combination process, step（1）The preparation technology of middle casting mold, concrete technology is such as
Under：Bentonite is placed in puddle mixer and then add by quartz sand to be blended, and dry-mixed 9-11min, is then added waterglass, is continued
15-20min is mixed, shakes out and moulding is carried out according to bearing ring.
The casting of aforementioned bearings collar blank is rolled in combination process, in addition to step（2）In the molten steel that pours into ladle enter
Row removes Slag treatment, and perlite slag making is dispensed specially on molten steel and is skimmed with cleaning molten steel and at once.
The casting of aforementioned bearings collar blank is rolled in combination process, step（6）In refrigerating work procedure be specially using water cooling with
Air cooling combines, and first uses water cooling, to 300-350 DEG C, to be then air-cooled to 280- with 8-9 DEG C/s cooling bearing lasso casting water cooling
300 DEG C, then use water cooling with 4-6 DEG C/s cooldown rate by bearing ring casting water cooling to 200-220 DEG C, be finally air-cooled to room
Temperature.
The beneficial effects of the invention are as follows：
The present invention adds the casting and rolling composite forming technique of rolling to instead of original technique using bearing ring casting, using normal
The smelting of rule and pouring technology pour into bearing ring casting, then bearing ring casting rolling is processed into the hair of bearing ring
Base, normalizing and modifier treatment then are carried out to it, its acquisition is met the mechanical property of technical requirements, and the technique improves
Production efficiency, has saved the energy, manpower and equipment investment, is advantageous to shorten technological process, improves production efficiency, realizes energy-conservation
Emission reduction and clean manufacturing, there is important theory significance and practical value.
After the conditioned heat treatment of bearing ring casting, tensile strength, yield strength, room temperature impact absorption is attacked and hardness all reaches
The standard of casting is arrived and has been strengthened.
By new casting mold formula and the technological parameter of metallurgy and foundry in the present invention, and properly increase the temperature of smelting, drop
The measure such as low pouring temperature and control poring rate can effectively control casting solidification process, realizes crystal grain refinement and eliminate casting
Defect is made, ensure that the quality of casting.
It is that ring casting rolling is compound that the bearing ferrule blanks that the technique of the present invention prepares, which have higher quality and performance,
Shaping provides a good basis so that it is higher that compound ring formability quality out is rolled in casting.
The present invention can be made bearing ferrule blanks surface produce 2-4mm thickness tempered martensite, be had by Tempering and Quenching
Imitate its water erosion resistent ability improved, rear cooling, the method combined by water cooling with air cooling is first with faster cooling velocity water cooling,
Then air cooling is carried out, finally again by slower cooling by water to room temperature, can not only improve the water erosion resistent ability of steel loop base, and
Tissue can be made to be more uniformly distributed stabilization, stomata and trachoma seldom occur, ensure that the corrosion resistance of bearing ferrule blanks, play
Unexpected technique effect.
Appropriate compound rare-earth element is added in the component of bearing ferrule blanks of the present invention, due to the gold of above rare earth element
Category atomic radius is big and rare earth has higher activity, it is easy to fills up in its crystal grain and defect, and generates and can hinder crystal grain
The film of continued growth so that crystal grain refinement and improve the performance of steel, meanwhile, rare earth element is easily given birth to the element compounds such as oxygen, sulphur
The compound high into fusing point, the effect of purification steel can be played.
Embodiment
Embodiment 1
The present embodiment provides a kind of bearing ferrule blanks, and component is the bearing ferrule blanks by mass percentage：C：
0.40%, Mn：1.00%, Si：0.45%, Cr：1.25%, Mo：0.20%, P：0.05%, Ti：0.09%, Al：0.20%, V:0.20%,
Ni：0.30%, Cu：0.20%, S：0.02%, compound rare-earth：0.12%, surplus Fe；Compound rare-earth by mass percentage include with
Lower component：Lanthanum：25%, praseodymium：16%, dysprosium：13%, holmium：6%, gadolinium：9%, yttrium：9%, cerium：9%, neodymium：8%, europium：5%.
Combination process is rolled in the casting of the bearing ferrule blanks, has operating procedure as follows：
（1）Be blended casting mold using molding sand, and casting mold delivered in baker carry out drying at 210 DEG C it is stand-by；
Molding sand includes following components by mass percentage：Waterglass 9%, bentonite：2%, remaining is quartz sand；By quartz
Sand is placed in puddle mixer and then added bentonite and is blended, and dry-mixed 9min, then adds waterglass, continues to mix 15min, goes out
Sand carries out moulding according to bearing ring；
（2）Above-mentioned chemical constituent is delivered into electric arc furnaces to be smelted to obtain molten steel, smelting temperature is 1690 DEG C, is smelted
4.2h, the molten steel of smelting is poured into ladle, perlite slag making is dispensed on molten steel and is skimmed with cleaning molten steel and at once, it is calm
3min to molten steel temperature be 1570 DEG C, then by molten steel implantation step（1）In casting mold in obtain bearing ring casting, cast temperature
Spend for 1570 DEG C, poring rate control is incubated 20h, treats bearing ring in 65kg/s, cast 18s, the casting mold that will be cast with molten steel
Casting carries out cutting dead head when being cooled to 480 DEG C；
（3）By step（2）In bearing ring casting be heated to 1150 DEG C, firing rate is 120 DEG C/h, insulation 5h it is laggard
Row rolling, it is 50t to roll over machine axial rolling force, and radial rolling power is 100t；
（4）Bearing ring casting after rolling is subjected to normalized treatment, it is specific as follows：
580 DEG C are warming up to 50 DEG C/h firing rate, is incubated 0.8h, then 850 DEG C are warming up to 70 DEG C/h speed, after
Continuation of insurance temperature is air-cooled to room temperature to coming out of the stove after 8h；
（5）Bearing ring casting after normalized treatment is subjected to modifier treatment, it is specific as follows：
580 DEG C are warming up to 50 DEG C/h firing rate, is incubated 0.8h, then 850 DEG C are warming up to 70 DEG C/h speed, is protected
Come out of the stove after warm 2.5h quenching, be tempered in time after quenching, be warming up to 520 DEG C with 20 DEG C/h firing rate, be incubated 5h, come out of the stove
Cooling；
（6）To step（5）In bearing ring casting after conditioned heat treatment be down to room temperature, refrigerating work procedure through refrigerating work procedure
Specially combined using water cooling with air cooling, first use water cooling with 8 DEG C/s cooling bearing lasso casting water cooling to 300 DEG C, then
Be air-cooled to 290 DEG C, then use water cooling with 4 DEG C/s cooldown rate by bearing ring casting water cooling to 220 DEG C, be finally air-cooled to room
The warm and bearing ring casting to being down to room temperature is polished and is machined, and finally gives bearing ferrule blanks.
Embodiment 2
The present embodiment provides a kind of bearing ferrule blanks, and component is the bearing ferrule blanks by mass percentage：C：
0.45%, Mn：0.80%, Si：0.35%, Cr：1.00%, Mo：0.25%, P：0.04%, Ti：0.08%, Al：0.23%, V:0.10%,
Ni：0.20%, Cu：0.15%, S：0.01%, compound rare-earth：0.14%, surplus Fe；
Compound rare-earth includes following components by mass percentage：Lanthanum：25%, praseodymium：18%, dysprosium：11%, holmium：7%, gadolinium：8%,
Yttrium：8%, cerium：8%, neodymium：8%, europium：7%.
Combination process is rolled in the casting of the bearing ferrule blanks, has operating procedure as follows：
（1）Be blended casting mold using molding sand, and casting mold delivered in baker carry out drying at 200 DEG C it is stand-by；
Molding sand includes following components by mass percentage：Waterglass 11%, bentonite：1%, remaining is quartz sand；By stone
Sand is placed in puddle mixer and then added bentonite and is blended, and dry-mixed 11min, then adds waterglass, continues to mix
20min, shake out and moulding is carried out according to bearing ring；
（2）Above-mentioned chemical constituent is delivered into electric arc furnaces to be smelted to obtain molten steel, smelting temperature is 1700 DEG C, is smelted
4.5h, the molten steel of smelting is poured into ladle, perlite slag making is dispensed on molten steel and is skimmed with cleaning molten steel and at once, it is calm
8min to molten steel temperature be 1580 DEG C, then by molten steel implantation step（1）In casting mold in obtain bearing ring casting, cast temperature
Spend for 1580 DEG C, poring rate control is incubated 20h, treats bearing ring in 70kg/s, cast 20s, the casting mold that will be cast with molten steel
Casting carries out cutting dead head when being cooled to 450 DEG C；
（3）By step（2）In bearing ring casting be heated to 1200 DEG C, firing rate is 130 DEG C/h, insulation 4h it is laggard
Row rolling, it is 150t to roll over machine axial rolling force, and radial rolling power is 250t；
（4）Bearing ring casting after rolling is subjected to normalized treatment, it is specific as follows：
600 DEG C are warming up to 70 DEG C/h firing rate, is incubated 0.5h, then 900 DEG C are warming up to 80 DEG C/h speed, after
Continuation of insurance temperature is air-cooled to room temperature to coming out of the stove after 7h；
（5）Bearing ring casting after normalized treatment is subjected to modifier treatment, it is specific as follows：
600 DEG C are warming up to 70 DEG C/h firing rate, is incubated 0.5h, then 880 DEG C are warming up to 80 DEG C/h speed, is protected
Come out of the stove after warm 3h quenching, be tempered in time after quenching, be warming up to 550 DEG C with 30 DEG C/h firing rate, be incubated 6h, come out of the stove cold
But；
（6）To step（5）In bearing ring casting after conditioned heat treatment be down to room temperature, refrigerating work procedure through refrigerating work procedure
Specially combined using water cooling with air cooling, first use water cooling with 8 DEG C/s cooling bearing lasso casting water cooling to 350 DEG C, then
Be air-cooled to 300 DEG C, then use water cooling with 6 DEG C/s cooldown rate by bearing ring casting water cooling to 200 DEG C, and to being down to room temperature
Bearing ring casting polished and be machined, finally give bearing ferrule blanks.
Embodiment 3
The present embodiment provides a kind of bearing ferrule blanks, and component is the bearing ferrule blanks by mass percentage：C：
0.42%, Mn：0.9%, Si：0.55%, Cr：0.95%, Mo：0.30%, P：0.03%, Ti：0.10%, Al：0.21%, V:0.15%,
Ni：0.15%, Cu：0.25%, S：0.015 %, compound rare-earth：0.13%, surplus Fe；
Compound rare-earth includes following components by mass percentage：Lanthanum：30%, praseodymium：15%, dysprosium：11%, holmium：5%, gadolinium：8%,
Yttrium：8%, cerium：8%, neodymium：7%, europium：8%.
Combination process is rolled in the casting of the bearing ferrule blanks, has operating procedure as follows：
（1）Be blended casting mold using molding sand, and casting mold delivered in baker carry out drying at 205 DEG C it is stand-by；
Molding sand includes following components by mass percentage：Waterglass 8%, bentonite：2%, remaining is quartz sand；By quartz
Sand is placed in puddle mixer and then added bentonite and is blended, and dry-mixed 10min, then adds waterglass, continues to mix 18min,
Shake out and moulding is carried out according to bearing ring；
（2）Above-mentioned chemical constituent to be delivered into electric arc furnaces to be smelted to obtain molten steel, smelting temperature is 1680 DEG C, smelts 4h,
The molten steel of smelting is poured into ladle, perlite slag making is dispensed on molten steel and is skimmed with cleaning molten steel and at once, calm 5min is extremely
Molten steel temperature is 1575 DEG C, then by molten steel implantation step（1）In casting mold in obtain bearing ring casting, pouring temperature is
1575 DEG C, poring rate control is incubated 21h, treats bearing ring casting in 68kg/s, cast 15s, the casting mold that will be cast with molten steel
Cutting dead head is carried out when being cooled to 500 DEG C；
（3）By step（2）In bearing ring casting be heated to 1160 DEG C, firing rate is 125 DEG C/h, be incubated 4.5h after
Rolling is carried out, it is 100t to roll over machine axial rolling force, and radial rolling power is 150t；
（4）Bearing ring casting after rolling is subjected to normalized treatment, it is specific as follows：
550 DEG C are warming up to 30 DEG C/h firing rate, is incubated 0.7h, then 870 DEG C are warming up to 50 DEG C/h speed, after
Continuation of insurance temperature is air-cooled to room temperature to coming out of the stove after 7h；
（5）Bearing ring casting after normalized treatment is subjected to modifier treatment, it is specific as follows：
550 DEG C are warming up to 30 DEG C/h firing rate, is incubated 0.7h, then 870 DEG C are warming up to 50 DEG C/h speed, is protected
Come out of the stove after warm 0.8h quenching, be tempered in time after quenching, be warming up to 500 DEG C with 25 DEG C/h firing rate, be incubated 5h, come out of the stove
Cooling；
（6）To step（5）In bearing ring casting after conditioned heat treatment be down to room temperature, refrigerating work procedure through refrigerating work procedure
Specially combined using water cooling with air cooling, first use water cooling with 9 DEG C/s cooling bearing lasso casting water cooling to 330 DEG C, then
Be air-cooled to 280 DEG C, then use water cooling with 5 DEG C/s cooldown rate by bearing ring casting water cooling to 210 DEG C, and to being down to room temperature
Bearing ring casting polished and be machined, finally give bearing ferrule blanks.
In addition to the implementation, the present invention can also have other embodiment.It is all to use equivalent substitution or equivalent transformation shape
Into technical scheme, all fall within the protection domains of application claims.
Claims (7)
1. combination process is rolled in a kind of casting of bearing ferrule blanks, component is the bearing ferrule blanks by mass percentage：C：0.40-
0.45%, Mn：0.80-1.00%, Si：0.35-0.55%, Cr：0.95-1.25%, Mo：0.20-0.30%, P：0.03-
0.05%, Ti：0.08-0.10%, Al：0.20-0.23%, V:0.10-0.20%, Ni≤0.30%, Cu≤0.25%, S≤
0.02%, compound rare-earth：0.12-0.14%, surplus Fe；
Described compound rare-earth includes following components by mass percentage：Lanthanum：25-30%, praseodymium：15-18%, dysprosium：11-14%,
Holmium：5-8%, gadolinium：8-10%, yttrium：8-10%, cerium：8-11%, neodymium：7-9%, europium：5-10%, above each component sum are
100%, it is characterised in that the as follows with operating procedure of combination process is rolled in the casting of bearing ferrule blanks：
(1) be blended casting mold using molding sand, and casting mold delivered in baker carry out drying at 200-210 DEG C it is stand-by；
The molding sand includes following components by mass percentage：Waterglass 8-11%, bentonite：1-2%, remaining is quartz
Sand；
(2) raw material of above-mentioned chemical constituent to be delivered into electric arc furnaces to be smelted to obtain molten steel, smelting temperature is 1680-1700 DEG C,
4-4.5h is smelted, the molten steel of smelting is poured into ladle, calm 3-8min to molten steel temperature is 1570-1580 DEG C, then by steel
Bearing ring casting is obtained in casting mold in liquid implantation step (1), pouring temperature is 1570-1580 DEG C, and poring rate control exists
65-70kg/s, 15-20s is poured into a mould, the casting mold for being cast with molten steel is incubated 20-21h, treats that bearing ring casting is cooled to 450-500
DEG C when carry out cutting dead head；
(3) the bearing ring casting in step (2) is heated to 1150-1200 DEG C, firing rate is 120-130 DEG C/h, insulation
Rolling is carried out after 4-5h, it is 50-150t to roll over machine axial rolling force, and radial rolling power is 100-250t；
(4) the bearing ring casting after rolling is subjected to normalized treatment, it is specific as follows：
550-600 DEG C is warming up to 30-70 DEG C/h firing rate, is incubated 0.5-0.8h, then heat up with 50-80 DEG C/h speed
To 850-900 DEG C, it is air-cooled to room temperature to coming out of the stove after 7-8h to continue insulation；
(5) the bearing ring casting after normalized treatment is subjected to modifier treatment, it is specific as follows：
550-600 DEG C is warming up to 30-70 DEG C/h firing rate, is incubated 0.5-0.8h, then heat up with 50-80 DEG C/h speed
To 850-880 DEG C, quenching of being come out of the stove after insulation 2.5-3h, it is tempered after quenching, is heated up with 20-30 DEG C/h firing rate in time
To 500-550 DEG C, 5-6h, cooling of coming out of the stove are incubated；
(6) room temperature is down to through refrigerating work procedure to the bearing ring casting after conditioned heat treatment in step (5), and to being down to room temperature
Bearing ring casting polished and be machined, finally give bearing ferrule blanks.
2. combination process is rolled in the casting of bearing ferrule blanks according to claim 1, it is characterised in that the bearing ferrule blanks
Component is by mass percentage：C：0.40%, Mn：1.00%, Si：0.45%, Cr：1.25%, Mo：0.20%, P：0.05%,
Ti：0.09%, Al：0.20%, V:0.20%, Ni：0.30%, Cu：0.20%, S：0.02%, compound rare-earth：0.12%, it is remaining
Measure as Fe；
Described compound rare-earth includes following components by mass percentage：Lanthanum：25%, praseodymium：16%, dysprosium：13%, holmium：6%, gadolinium：
9%, yttrium：9%, cerium：9%, neodymium：8%, europium：5%.
3. combination process is rolled in the casting of bearing ferrule blanks according to claim 1, it is characterised in that the bearing ferrule blanks
Component is by mass percentage：C：0.45%, Mn：0.80%, Si：0.35%, Cr：1.00%, Mo：0.25%, P：0.04%,
Ti：0.08%, Al：0.23%, V:0.10%, Ni：0.20%, Cu：0.15%, S：0.01%, compound rare-earth：0.14%, it is remaining
Measure as Fe；
Described compound rare-earth includes following components by mass percentage：Lanthanum：25%, praseodymium：18%, dysprosium：11%, holmium：7%, gadolinium：
8%, yttrium：8%, cerium：8%, neodymium：8%, europium：7%.
4. combination process is rolled in the casting of bearing ferrule blanks according to claim 1, it is characterised in that the bearing ferrule blanks
Component is by mass percentage：C：0.42%, Mn：0.9%, Si：0.55%, Cr：0.95%, Mo：0.30%, P：0.03%,
Ti：0.10%, Al：0.21%, V:0.15%, Ni：0.15%, Cu：0.25%, S：0.015%, compound rare-earth：0.13%, it is remaining
Measure as Fe；
Described compound rare-earth includes following components by mass percentage：Lanthanum：30%, praseodymium：15%, dysprosium：11%, holmium：5%, gadolinium：
8%, yttrium：8%, cerium：8%, neodymium：7%, europium：8%.
5. combination process is rolled in the casting of bearing ferrule blanks according to claim 1, it is characterised in that：Cast in the step (1)
The preparation technology of type, concrete technology are as follows：Bentonite is placed in puddle mixer and then adds by quartz sand to be blended, dry-mixed 9-
11min, waterglass is then added, continue to mix 15-20min, shake out and moulding is carried out according to bearing ring.
6. combination process is rolled in the casting of bearing ferrule blanks according to claim 1, it is characterised in that：Also include to step (2)
In the molten steel that pours into ladle carry out removing Slag treatment, perlite slag making is dispensed specially on molten steel and is taken off with cleaning molten steel and at once
Slag.
7. combination process is rolled in the casting of bearing ferrule blanks according to claim 1, it is characterised in that：In described step (6)
Refrigerating work procedure be specially combined using water cooling with air cooling, first use water cooling with 8-9 DEG C/s cooling bearing lasso casting water cooling
To 300-350 DEG C, 280-300 DEG C is then air-cooled to, then uses water cooling with 4-6 DEG C/s cooldown rate by bearing ring casting water
It is cooled to 200-220 DEG C, is finally air-cooled to room temperature.
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| CN104882832B (en) * | 2015-05-29 | 2019-03-19 | 金海新源电气江苏有限公司 | A kind of vertical male bend of ladder-type leads to gantry and preparation method thereof |
| CN105840658A (en) * | 2016-04-08 | 2016-08-10 | 苏州捷德瑞精密机械有限公司 | Low-wear aluminum-magnesium-nickel alloy bearing and preparation method thereof |
| CN107511456A (en) * | 2017-08-03 | 2017-12-26 | 六安万邦机械科技有限公司 | A kind of casting technique of evaporative pattern |
| CN108546888A (en) * | 2018-05-11 | 2018-09-18 | 铜陵市大明玛钢有限责任公司 | A kind of ball grinding machine lining board production technology |
| CN110814301A (en) * | 2019-09-27 | 2020-02-21 | 长兴小浦铸钢有限公司 | Semi-ring and manufacturing method thereof |
| CN114248073B (en) * | 2021-12-22 | 2023-04-14 | 中国科学院金属研究所 | A kind of steel ferrule and preparation method thereof |
| CN115110003B (en) * | 2022-06-30 | 2024-03-12 | 中国铁建重工集团股份有限公司 | Steel for main bearing of heading machine and production method thereof |
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| JP4464863B2 (en) * | 2005-04-27 | 2010-05-19 | 株式会社神戸製鋼所 | Case hardening steel with excellent grain coarsening resistance and cold workability |
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