CN104372255B - A kind of impact-resistant and high-wear-resistant steel ball steel and preparation method thereof - Google Patents
A kind of impact-resistant and high-wear-resistant steel ball steel and preparation method thereof Download PDFInfo
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- CN104372255B CN104372255B CN201410542763.9A CN201410542763A CN104372255B CN 104372255 B CN104372255 B CN 104372255B CN 201410542763 A CN201410542763 A CN 201410542763A CN 104372255 B CN104372255 B CN 104372255B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention belongs to iron and steel technical field, in particular it relates to a kind of impact-resistant and high-wear-resistant steel ball steel and preparation method thereof.The impact-resistant and high-wear-resistant steel ball steel of the present invention, its chemical composition is by mass percentage: C:0.64% 0.71%, Si:0.20% 0.40%, Mn:1.90% 2.05%, Cr:0.90% 1.05%, Al:0.02% 0.05%, P≤0.02%, S≤0.015%, O≤15ppm, H≤1.5ppm, and surplus is Fe and inevitable impurity.Steel of the present invention has the features such as good impact resistance, wearability, structural homogenity so that produce steel ball the most broken and lose circle, has that production efficiency is high, low cost and other advantages.
Description
Technical field
The invention belongs to iron and steel technical field, in particular it relates to a kind of impact-resistant and high-wear-resistant steel ball steel and
Preparation method.
Background technology
In recent years, along with on domestic and international ore deposit, building, metallurgy, chemical industry, pottery, the energy, the industry such as power plant and cement rapid
Development, wear-resistant ball is as the major product in wear-resisting industry, and market demand is increasing, and its consumption accounts in wear-resisting industry
According to the first, accounting reaches 55%, and the working environment of wear-resistant ball is more severe, and the wearability of plain ball can not meet
The grinding requirement of upper all industries.
On the one hand wear-resistant ball moves in a circle with cylinder；On the other hand between ball and ball, ball and abrasive particle, collision and milling i.e. do
Random relative motion.Leave shock when wear-resistant ball reach a certain height and to roll over comminution material be a cycle of operation.At this
In complicated motor process, abrading-ball subjects the ablation of impact, normal pressure, tangential force and abrasive particle and is worn until losing
Effect.Wear-resistant ball is when leaving, and the impact energy produced when outermost wear-resistant ball leaves is maximum, and i.e. impact force is
Greatly.
A kind of ball mill steel of the patent disclosure of publication number CN101962734A and preparation method thereof, chemistry contained by it becomes
Point it is by weight percentage:: C:0.75-0.85%, Si:0.17-0.35%, Mn:0.70-0.90%, P≤0.030%, S
≤ 0.030%, Cr:0.40-0.60%, Ni :≤0.20%, Al:0.010-0.060%, Cu≤0.20%, remaining is Fe and not
Evitable impurity.The processed steel ball hot of this steel grade shows hardness: 55-58HRC, core hardness: 50-53HRC, impact after processing
Toughness: 12-13J/cm2, anti-wear performance (iron mine abrasion g/t ore deposit): 440-474g/t.This steel grade impact property and anti-wear performance
Low, it is impossible to meeting working condition and badly use requirement, and iron mine abrasion height, cost is high.
Severe along with working environment, adds that iron mine abrasion, to production cost control, are required more and more severe by manufacturer
Carving, the impact flexibility of this steel grade and wearability are not well positioned to meet and require higher field requirement.
Summary of the invention
The purpose of the present invention is primarily directed to the impact flexibility of current abrasion-proof steel ball and wearability can not meet use well
Family requirement, it is provided that a kind of impact-resistant and high-wear-resistant steel ball steel and preparation method thereof, improves the impact property of steel ball and the machine such as wear-resisting
Tool performance, meets higher field and user reduces cost needs.
The impact-resistant and high-wear-resistant steel ball steel of the present invention, its chemical composition is by mass percentage: C:0.64%-
0.71%, Si:0.20%-0.40%, Mn:1.90%-2.05%, Cr:0.90%-1.05%, Al:0.02%-0.05%, P
≤ 0.02%, S≤0.015%, O≤15ppm, H≤1.5ppm, surplus is Fe and inevitable impurity.
Preferably, the chemical composition of described steel ball steel is by mass percentage: C:0.65%-0.70%, Si:
0.22%-0.40%, Mn:1.95%-2.05%, Cr:0.95%-1.05%, Al:0.02%-0.04%, P≤0.02%, S
≤ 0.015%, O≤15ppm, H≤1.5ppm, surplus is Fe and inevitable impurity.
Impact-resistant and high-wear-resistant steel ball steel of the present invention, its case hardness is 63-64HRC, and core hardness is 58-
59HRC, impact flexibility is 19-20J/cm2, falling ball impact test number of times is 16750-16830 time, and anti-wear performance is 400-410 iron mine
Abrasion g/t ore deposit.
Present invention also offers the preparation method of a kind of above-mentioned impact-resistant and high-wear-resistant steel ball steel, including: just refining, refine,
The processing step such as continuous casting, rolling, specifically, comprises the following steps:
(1) slightly refining: baking temperature of steel ladle >=800 DEG C, mass percent >=0.40% of terminal C, terminal P mass percent
≤ 0.012%, molten steel tapping temperature 1630-1670 DEG C；
(2) refine: molten steel enters refining furnace deoxidization desulfuration after thick refining；Molten steel after deoxidization desulfuration is carried out vacuum outgas
Processing, vacuum is less than 67Pa, retention time >=15 minute, soft blow time >=10 minute after broken sky, upper steel temperature after vacuum outgas
Spend 1555-1570 DEG C；
(3) continuous casting: keeping liquid level fluctuation of crystallizer≤± 2mm, the degree of superheat controls at 15-25 DEG C, and tundish temperature is
1490-1505 DEG C, pulling rate is 0.65 ± 0.05mm/min, enters to cheat slow cooling time >=36 hour；
(4) rolling: rolling reduction >=6, heating furnace heating-up temperature is 1180-1220 DEG C, 2.5-3 hour heat time heating time,
Start rolling temperature 1080-1120 DEG C, finishing temperature 850-1000 DEG C, prepare hot rolled circular steel.In the operation of rolling, reasonable distribution rolls
Passage, roughing mill is reversable mill, rolls 7 passages, and first roll reduction is 40mm, and roughing is 260 by continuous casting billet type
× 300mm, is rolled into 165 × 165mm base type, and finishing mill is 4 machine tandem rollings.
Before above-mentioned steps (2) molten steel vacuum outgas, it need to be taken off slag operation, the amount of skimming 1/3-3/5.
The present invention slightly refining stove is electric furnace or converter；Refine stove is LF stove (ladle refining furnace), and vacuum outgas stove is
VD stove (vacuum degassing furnace).
Compared with prior art, technical characterstic and the technical scheme of the present invention has the beneficial effect that:
1, present invention optimization in chemical composition: carbon in employing, improve Mn, Cr constituent content improve steel hardness,
Shock resistance and anti-wear performance.
2, the technological parameter of each operation during the present invention improves production: the first, vacuum deaeration refining, by formulating reasonable Argon
Stirring is formulated, is ensured that the measures such as enough vacuum outgas time, soft blow time ensure that molten steel cleanness, ingredient stability；The
Two, continuous casting passes through to use " three permanent operations ", use the cast of special crystallizer covering slag, full guard, electromagnetic agitation and low overheat
The measures such as cast, it is ensured that strand inside and surface quality；3rd, rolling process is by formulating rational heating cycle, rationally
Distribution rolling pass and roller repairing system, improve surface quality and roll rear even tissue sex chromosome mosaicism.
3, steel of the present invention, it is adaptable to both at home and abroad cross wedge rolling produces big specification steel ball, has good impact resistance, resistance to
Mill property, the feature such as structural homogenity so that produce steel ball the most broken and lose circle, have production efficiency high,
Low cost and other advantages.
Detailed description of the invention
The invention will be further described by the following examples.
Embodiment:
Impact-resistant and high-wear-resistant steel ball steel of the present invention, it is preferred to use UHP uhp electric arc furnace, LF external refining, VD vacuum
Degassing process, continuous casting strand, rolling become a useful person technique produce steel.Embodiment is come with Φ 125mm specification steel manufacturing process
Illustrate the implementation process of the present invention.
Production technology is as follows:
(1) slightly refine
Use electric furnace smelting, baking temperature of steel ladle >=800 DEG C, terminal [C] >=0.40%, [P]≤0.012%, remaining unit
Cellulose content meets design requirement, molten steel tapping temperature 1630-1670 DEG C；
(2) refine
Refining furnace uses LF stove, and after thick the white silk, molten steel enters LF stove deoxidization desulfuration, and LF furnace rear enters VD application of vacuum, enters VD stokehold
Carrying out taking off slag operation, the amount of skimming 1/3-3/5, VD vacuum is less than 67Pa retention time >=15 minute, and soft blow time after broken sky >=
10 minutes, upper steel temperature 1555-1570 DEG C after VD；
(3) continuous casting
Use electromagnetic agitation, " three is permanent " (constant temperature, constant speed, constant level), slighter compress, tundish lifting, full guard cast, move
The technology such as the weak cold water allocation model of state, it is ensured that slab quality meets the requirements；
Liquid level fluctuation of crystallizer≤± 2mm, the degree of superheat controls at 15-25 DEG C, tundish temperature 1490-1505 DEG C, pulling rate
Temperature 0.65 ± 0.05mm/min, enters to cheat slow cooling time >=36 hour；
(4) rolling
For ensureing the internal soundness of steel, rolling reduction >=6, heating furnace heating-up temperature: 1180-1220 DEG C, heat time heating time:
2.5-3 hour, start rolling temperature: 1080-1120 DEG C, finishing temperature: 850-1000 DEG C.
Concrete technology parameter is shown in that Tables 1 and 2, table 1 are impact-resistant and high-wear-resistant steel ball steel chemical compositions, and table 2 is that continuous casting rolls
Technological parameter processed, steel ball mechanical performance and contrast situation are shown in Table 3.
Table 1 embodiment chemical composition (quality, %)
| Embodiment | C | Si | Mn | P | S | Cr | Al | O×10-4 | H×10-4 | Fe |
| 1 | 0.65 | 0.27 | 1.98 | 0.010 | 0.006 | 0.98 | 0.035 | 11 | 1.2 | Surplus |
| 2 | 0.65 | 0.28 | 1.99 | 0.013 | 0.005 | 0.97 | 0.033 | 12 | 1.3 | Surplus |
| 3 | 0.66 | 0.26 | 1.98 | 0.012 | 0.007 | 1.00 | 0.036 | 13 | 1.2 | Surplus |
| 4 | 0.66 | 0.28 | 2.00 | 0.015 | 0.007 | 0.99 | 0.033 | 12 | 1.2 | Surplus |
| 5 | 0.65 | 0.27 | 1.99 | 0.013 | 0.008 | 0.98 | 0.032 | 12 | 1.1 | Surplus |
Table 2 continuous casting rolling technological parameter
Table 3 steel ball mechanical performance and contrast situation
The chemical composition of the most similar steel ball and the patent of preparation reference publication number CN101962734A.
The steel ball contrast that the steel ball made by steel of the present invention is made with similar steel, the mechanical performance of steel ball has carried
Height, iron mine abrasion decrease, and have saved cost.
Those of ordinary skill in the art it should be appreciated that above embodiment be intended merely to illustrate the present invention,
And be not used as limitation of the invention, the change as long as in the spirit of the present invention, to embodiment described above
Change, modification all will fall in the range of claims of the present invention.
Claims (6)
1. an impact-resistant and high-wear-resistant steel ball steel, it is characterised in that the chemical composition of described steel ball steel is by mass percentage
For: C:0.64%-0.71%, Si:0.20%-0.40%, Mn:1.90%-2.05%, Cr:0.90%-1.05%, Al:
0.02%-0.05%, P≤0.02%, S≤0.015%, O≤15ppm, H≤1.5ppm, surplus is Fe and the most miscellaneous
Matter；
Wherein, the case hardness of described steel ball steel is 63-64HRC, and core hardness is 58-59HRC, and impact flexibility is 19-
20J/cm2, falling ball impact test number of times is 16750-16830 time, and anti-wear performance is calculated as 400-410g/t with iron mine abrasion g/t ore deposit.
Impact-resistant and high-wear-resistant steel ball steel the most according to claim 1, it is characterised in that the chemistry one-tenth of described steel ball steel
Divide and be by mass percentage: C:0.65%-0.70%, Si:0.22%-0.40%, Mn:1.95%-2.05%, Cr:0.95%-
1.05%, Al:0.02%-0.04%, P≤0.02%, S≤0.015%, O≤15ppm, H≤1.5ppm, surplus is Fe and not
Evitable impurity.
3. a preparation method for arbitrary described impact-resistant and high-wear-resistant steel ball steel in claim 1 or 2, comprises the following steps:
(1) slightly refining: baking temperature of steel ladle >=800 DEG C, mass percent >=0.40% of terminal C, terminal P mass percent≤
0.012%, molten steel tapping temperature 1630-1670 DEG C；
(2) refine: molten steel enters refining furnace deoxidization desulfuration after thick refining；Molten steel after deoxidization desulfuration is carried out at vacuum outgas
Reason, vacuum is less than 67Pa, retention time >=15 minute, soft blow time >=10 minute after broken sky, upper steel temperature after vacuum outgas
1555-1570℃；
(3) continuous casting: keeping liquid level fluctuation of crystallizer between ± 2mm, the degree of superheat controls at 15-25 DEG C, and tundish temperature is
1490-1505 DEG C, pulling rate is 0.65 ± 0.05mm/min, enters to cheat slow cooling time >=36 hour；
(4) rolling: rolling reduction >=6, heating furnace heating-up temperature is 1180-1220 DEG C, 2.5-3 hour heat time heating time, open rolling
Temperature 1080-1120 DEG C, finishing temperature 850-1000 DEG C, prepare hot rolled circular steel.
Preparation method the most according to claim 3, it is characterised in that before described step (2) molten steel vacuum outgas, it is entered
Row takes off slag operation, the amount of skimming 1/3-3/5.
5. according to the preparation method described in claim 3 or 4, it is characterised in that the thick refining stove of described step (1) is electric furnace or turns
Stove.
6. according to the preparation method described in claim 3 or 4, it is characterised in that described step (2) refine stove is LF stove, very
Empty degassing stove is VD stove.
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| CN201410542763.9A CN104372255B (en) | 2014-10-14 | 2014-10-14 | A kind of impact-resistant and high-wear-resistant steel ball steel and preparation method thereof |
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| CN201410542763.9A CN104372255B (en) | 2014-10-14 | 2014-10-14 | A kind of impact-resistant and high-wear-resistant steel ball steel and preparation method thereof |
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| CN104372255B true CN104372255B (en) | 2016-08-17 |
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| CN104762562B (en) * | 2015-04-23 | 2017-01-18 | 山东钢铁股份有限公司 | Steel for large-diameter grinding balls and preparation method of steel |
| CN105132787B (en) * | 2015-08-20 | 2017-05-17 | 山东西王特钢有限公司 | B2 ultra-low carbon segregation index control method for high-grade mine mill ball |
| CN106191660A (en) * | 2016-08-22 | 2016-12-07 | 蚌埠市光辉金属加工厂 | A kind of high-strength impact-resistant high-abrasive material |
| CN106435363A (en) * | 2016-10-28 | 2017-02-22 | 河北天理环保科技有限公司 | Rolled high-wearable steel ball and production method thereof |
| CN106521321A (en) * | 2016-11-29 | 2017-03-22 | 安徽省宁国市宁沪钢球有限公司 | High-toughness wear resisting ball and preparation method thereof |
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| CN108220747B (en) * | 2018-01-05 | 2019-06-18 | 天津荣程联合钢铁集团有限公司 | A kind of preparation process and its cleaning equipment of abrasion-proof steel ball steel |
| CN108085602B (en) * | 2018-01-05 | 2019-05-17 | 天津荣程联合钢铁集团有限公司 | A kind of rolling processing method of abrasion-proof steel ball steel and the steel ball |
| CN108707824A (en) * | 2018-05-25 | 2018-10-26 | 山东钢铁股份有限公司 | A kind of anti-hydrogen-induced delayed cracking wear-resisting steel plate and preparation method thereof |
| CN110106438A (en) * | 2019-04-23 | 2019-08-09 | 河北工业大学 | The high soft core of volume hardness rolls abrading-ball steel, production method and grinding ball production method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1118174A (en) * | 1993-12-20 | 1996-03-06 | 新日本制铁株式会社 | Rail of high abrasion resistance and high tenacity having pearlite metalographic structure and method of manufacturing the same |
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2014
- 2014-10-14 CN CN201410542763.9A patent/CN104372255B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1118174A (en) * | 1993-12-20 | 1996-03-06 | 新日本制铁株式会社 | Rail of high abrasion resistance and high tenacity having pearlite metalographic structure and method of manufacturing the same |
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