CN108165890A - A kind of preparation method of low-cost high-strength nanometer bainite abrasion-proof steel ball - Google Patents

A kind of preparation method of low-cost high-strength nanometer bainite abrasion-proof steel ball Download PDF

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CN108165890A
CN108165890A CN201810018403.7A CN201810018403A CN108165890A CN 108165890 A CN108165890 A CN 108165890A CN 201810018403 A CN201810018403 A CN 201810018403A CN 108165890 A CN108165890 A CN 108165890A
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steel ball
bainite
temperature
preparation
wear
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CN108165890B (en
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于浩
余子权
宋成浩
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University of Science and Technology Beijing USTB
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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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/36—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for balls; for rollers
    • 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
    • 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
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • 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
    • C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/002—Bainite

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

A kind of preparation method of low-cost high-strength nanometer bainite abrasion-proof steel ball, belongs to metal material processing technical field.Steel ball weight percent is C：0.45~0.7wt.%, Si：1.5~3.0wt.%, Mn：0.5~2.0wt.%, Cr：0.1~1.5wt.%, Al：0.1~2.0wt.%, Ti：0.01~0.1wt.%, surplus are Fe and inevitable impurity.After steel grade smelts casting, hot rolling or hot forging keep the temperature 3~8h, you can obtain heterogeneous structure into diameter of phi 20~160mm steel balls after being quickly cooled to 200~400 DEG C.It is at low cost, heat treatment process is simple without the elements such as Mo, Ni, Nb, V in alloying component of the present invention, exempt the heat treatment procedures such as quenching and tempering, stable production process, crystal grain thinning while also significantly increases the wearability of steel ball.

Description

A kind of preparation method of low-cost high-strength nanometer bainite abrasion-proof steel ball
Technical field
The invention belongs to metal material processing technical fields, are related to a kind of room temperature texture for nanometer bainite, a small amount of remnants The heterogeneous structure and its production technology of phase composition is precipitated in the TiC of austenite and Dispersed precipitate.Steel grade involved in the present invention has excellent Different wearability is mainly used in the fields such as mine, metallurgy, electric power, building materials and chemical industry.
Background technology
Energy-saving and emission-reduction and the lightweight of traffic equipment are further emphasized in the great foundation engineering of country, accelerate manufacturing industry green Transformation and upgrade promote the industries such as steel, petrochemical industry, engineering machinery, light industry, weaving to the high-end development of value chain.For this purpose, it needs further The research dynamics of steel material is improved, is dedicated to developing novel, high-strength tenacity, light-weighted steel material, reduces and the energy is provided The consumption in source promotes the sustainable development of socio-economy.And the structural adjustment with key industry and industrial upgrading, there is an urgent need for high property It can be with the production model of high value-added product and green high-efficient low-carbon.China's steel production capacity has been in the serious superfluous stage, but It is that high value added product cannot still fully meet the market demand, it is still necessary to rely on import and make up.It is estimated that China is high-level wear-resisting The market demand of steel is every year at 500,000 ton -80 ten thousand tons, about 100,000 tons of import volume.In addition, countries in the world are caused by due to abrasion Economic loss, about 50,000,000,000 dollar/year of the U.S., German 15,300,000,000 Euros/year, about 100,000,000,000 yuan/year of China, therefore develop advanced Wear-resistant material has great economic implications.
At present, mainly there are the HARDOX series of SSAB companies of Sweden, Thyssen in external top abrasion-resistant stee manufacturing enterprise The XAR series of Ke Nubai, Dillingen, Germany V series, the RAEX series of Finland Luo Qi, Japan's JFE series etc..It is domestic high-end wear-resisting Steel market is captured by these overseas enterprises, and price is essentially one times or more of domestic same level abrasion-resistant stee, for example, fragrant Blue RAXE400 (8mm) price is 17500 yuan/ton, and Japanese JFE-EH400 (6-10mm) price is 14500 yuan/ton, Baosteel B- MARD400 (8mm) price is 7500 yuan/ton, and Xinyu abrasion-resistant stee NM500 (6mm) price is 8000 yuan/ton.State's interior energy production is high Mainly there are Wugang, Wuhan Iron and Steel Plant, Baosteel, Nangang etc., principal item NM360, NM400, usually using thick in the producer of intensity abrasion-resistant stee It spends for 6-80mm.Some producer's products have met or exceeded world level, and export to Southeast Asia, Japan, South Africa, the U.S., Australia The ground such as big Leah.The solderable high-strength structure wear-resisting steel plate of hardness HB >=360 grade of Wugang production, manufactured equipment are fitted For being used in the occasion of high abrasion, HI high impact, can also be used as the high-tensile structural steel of yield strength >=700MPa.Baosteel NM360, NM400 rank abrasion-resistant stees are successively developed, the size range for steel plate is thickness 12-60mm, width 900- 4500mm, length 8000-13000mm.Anshan Iron ＆. Steel Group Corp cooperates with University of Science ＆ Technology, Beijing, is successfully made bainite one The research and development of martensite wear-resistant steel plate, and it is organized and mechanical property has made intensive studies, it has been able to produce NM360, NM400 grade wear-resisting steel.On the whole, nowadays unbalanced present situation is presented in the development of abrasion-resistant stee technology：It is first, domestic and international Technology disparate development, domestic abrasion-resistant stee manufacturing enterprise lag behind international most advanced in technical merit, properties of product etc. Level；Second is that product category production is uneven, wear-resisting steel plate product specification size is complete, and manufacturing enterprise is numerous, and produces resistance to The enterprise for grinding steel bar and abrading-ball is relatively seldom.
China applies for a patent CN1189542 and discloses a kind of multielement micro-alloyed air cooled bainitic steel, which does not need to Complicated heat treatment process, after forging or rolls the rear air-cooled abrading-ball that can be obtained using bainite/martensite as Main Tissues, still In order to improve the quenching degree of material and hardness, a large amount of microalloy element, such as Nb, V, Ti, RE must be added in, is considerably increased Production cost.China applies for a patent CN104651722 and discloses a kind of bainite group with martensitic structure surface layer and softness Knit the preparation method of the forged steel ball of inner core, alloying component C：0.42~0.48wt.%, Si：0.15~0.35wt.%, Mn：0.53~0.90wt.%, Ni：0.06~0.20wt.%.Its surface martensite tissue hardness HRC62 is hereinafter, center portion bayesian More than body tissue hardness HRC40.Since surface and centre hardness differ greatly, this steel ball in use, when surface horse Steel ball is easy to fail after family name's body layer is worn away, and reduces the service life of material.China applies for a patent CN103225036 A kind of boron-carbide reinforced wear-resistant martensite nodular cast iron grinding ball and its manufacturing method are disclosed, this method obtains strong using control cooling The bainite matrix of good toughness, by adding in boron, chromium obtains a certain number of high rigidity (Fe, Cr)2(B, C) boron-carbide To improve the wearability of abrading-ball.But this method produces abrasion-proof steel ball using casting technique, is easy to inside steel ball Bubble or loose phenomenon, so as to make steel ball interior tissue coarse, the particularly place at sprue gate easily causes hardness unevenness, Steel ball is caused to lose circle broken.
In conclusion the present invention is based on scientific and rational design of alloy, by smelting, casting, hot rolling or Diameter of phi 20~160mm steel balls are hot-forged into, a period of time is kept the temperature after being quickly cooled to certain temperature using hot-working waste heat, you can Obtain the heterogeneous structure that phase composition is precipitated using nanometer bainite as matrix, retained austenite and TiC.The innovative of the present invention embodies It is as follows：1) it economizes on resources, reduce cost, develop steel grade as medium high carbon low-alloy steel, alloy content is seldom, and without Mo, Ni Etc. national strategies resource, without precious metal elements such as Nb, V；2) environmental-friendly, energy-saving and emission-reduction, the Bainite wear-resisting steel utilize heat Waste heat is processed, it is i.e. available by certain cooling, heat preservation method processing without reheating the heat treatment process such as quenching, tempering The nanometer bainite structure of excellent combination property reduces energy consumption and saves time and production cost, substantially increases product Cost performance.
Invention content
For requirement of the abrasion-proof steel ball steel to material hardness, toughness and production cost, the present invention provides a kind of resource Environmentally friendly nanometer bainite abrasion-proof steel ball and preparation method thereof is saved, which has excellent wear-resisting property, be produced into This low, simple for process and energy-saving and emission-reduction, there is huge commercial promise in fields such as mine, metallurgy, electric power, building materials and chemical industry.
The present invention provides a kind of preparation method of low-cost high-strength nanometer bainite abrasion-proof steel ball, which is characterized in that closes Golden composition by weight percent is C：0.45~0.7wt.%, Si：1.5~3.0wt.%, Mn：0.5~2.0wt.%, Cr：0.1 ~1.5wt.%, Al：0.1~2.0wt.%, Ti：0.01~0.1wt.%, surplus are Fe and inevitable impurity；
Preparation process includes the following steps：
Step 1 is smelted according to above-mentioned alloying component, is cast, and hot rolling or hot forging are into diameter of phi 20~160mm steel Ball, total reduction are 75~90%；Start rolling temperature or starting forging temperature are 1050~1150 DEG C, and finishing temperature or final forging temperature are 950~1000 DEG C；
Above-mentioned steel ball is air-cooled to 800~900 DEG C, is then quickly cooled to 200~400 DEG C, at this temperature by step 2 Keep the temperature 3~8h, you can obtain the heterogeneous structure that phase composition is precipitated in nanometer bainite matrix, a small amount of retained austenite and TiC.
Further, Ti is added in alloying component, the TiC precipitated phases for form nano-grade size, being evenly distributed, it is suppressed that shape Become the coarse grains of austenite, crystal grain thinning, while enhance matrix strength, improve wear-resisting property.
Further, rolling or forged steel ball are air-cooled to 800~900 DEG C, which is higher than the upper limit in perlitic transformation area Temperature, while it is also at the Precipitation Temperature section of TiC, it is therefore intended that promote a large amount of precipitations of TiC particles.
Further, the speed that steel ball is quickly cooled down is more than 5 DEG C/s, to avoid perlitic transformation area, makes overcooling austenite It is directly entered bainite transformation area.
Further, the volume fraction of steel ball residual austenite body tissue is 5~20%.
Further, the holding temperature of steel ball is different, and soaking time and corresponding organization and performance are also different, with guarantor The reduction of temperature, nanometer bainite piece interlamellar spacing reduce, and intensity and hardness increase, and soaking time also accordingly extends.
Further, the mechanical property of the wear-resistant bainite steel ball is：Yield strength Rp>=1600MPa, tensile strength Rm >=1900MPa, elongation after fracture A >=10%, Rockwell hardness HRC >=55, room temperature impact toughness ak >=20J/cm2。
The effect of essential element is as follows in material of the present invention：
C：When phosphorus content is in below 0.8wt.% in steel, the intensity and hardness of steel can be improved, and have by increasing carbon content The reduction Ms points of effect and Bs points, expand the temperature difference between Ms and Bs, ensure the formation of low-temperature nano bainite.Pass through Thermo-calc and MUCG83 carries out calculating discovery, and when phosphorus content is more than 0.45wt.%, the temperature range of bainite transformation expands It is big to can be adapted to industrial zone of reasonableness.On the other hand, excessively high carbon content can reduce the phase transformation driving of bainite transformation Power and conversion rates cause bainite transformation degree low, and the isothermal processes time is elongated, reduce production efficiency, improve production cost. When phosphorus content is 0.8wt.%, fringe time is about 28h；When phosphorus content is 1.0wt.%, fringe time is more than 3000h. Consider the factors such as properties of product and production cost, select to improve the carbon content of abrasion-proof steel ball to 0.45~0.7wt.%.
Si：For silicon as a kind of non-carbide formation element, the precipitation of cementite can be hindered by adding in silicon, avoid generating to tough The brittlement phase that property and plasticity are harmful to, while can ensure the carbon content in austenite, make retained austenite that can stablize at room temperature In the presence of the minimum 1.5wt.% of content of silicon that cementite can effectively be hindered to be precipitated adds in 1.5~2.0wt.% usually in steel Silicon.In addition silicon can increase the intensity of austenite, so as to refine bainite structure as a kind of solution strengthening element.Element silicon Can move up pearlitic transformation area, bainitic transformation area moves down, make transition curve up and down pull open, it is easier to control bainite turn Become.But silicon is more significant to the retardation function of bainite transformation, so consider, select the additive amount of silicon for 1.5~ 3.0wt.%.
Mn：Manganese can both improve the intensity of metal by solution strengthening, can also detach C curve up and down, improve through hardening Property, the phase driving force of bainite is significantly reduced, reduces bainite transformation temperature, can also reduce martensite transformation temperature, and energy Lath is enough refined, is conducive to obtain the tiny bainite structure of size.But excessively high manganese content can reduce the transformation of bainite Rate, and serious carbon segregation can be caused.Consider, the additive amount for selecting manganese is 0.5~2.0wt.%.
Cr：Chromium can improve the stability of overcooling austenite, increase the transformation incubation period of bainite.In addition, Cr can be carried The quenching degree of Gao Gang and reduction martensite start temperature.Consider, select the additive amount of chromium for 0.1~ 1.5wt.%.
Al：Aluminium can increase the free energy difference between bainite ferrite and austenite, accelerate bainite transformation rate, together When can be with thinning microstructure.When aluminium addition is excessive, molten steel flow is decreased obviously, and casting difficulty greatly improves, while in steel Al2O3Wait Slag inclusions that can also dramatically increase.In addition, Al and Co is used cooperatively to accelerating bainite transformation effect more preferable, but Co valencys Lattice are more expensive, and addition Co can increase production cost, therefore not add Co in the alloying component designed by the present invention.Consider bainite The factors such as fringe time, actual production and cost, the additive amount for selecting aluminium are 0.1~2.0wt.%.
Ti：Titanium is micro alloying element common in high-quality steel, tiny carbonitride can be formed with C, N, in Austria of steel It can inhibit the coarsening of crystal grain during family name's bodyization, improve Unhydrated cement temperature, while the TiC being precipitated can play reinforcing base The effect of body increases the intensity and wearability of steel.The study found that when the content of titanium is 0.01~0.1wt.% in the present invention, analysis The size of TiC particles, distribution and the volume fraction gone out reaches most rational proportioning, and the intensity and wearability of steel are best.Therefore it selects The additive amount of titanium is 0.01~0.1wt.%.
The present invention is matched by rational element, and hot rolled or forging and Residual Heat Treatment technique are efficiently prepared A kind of nanoscale lath Bainite wear-resisting steel ball.The yield strength R of materialp>=1600MPa, tensile strength Rm>=1900MPa breaks Elongation A >=10% afterwards, centre hardness are 55~56HRC, and case hardness is 58~60HRC, room temperature impact toughness ak >=20J/ cm2.Preparation process of the present invention is simple, without heat treatment steps such as reheating quenching, tempering, reduces cost, energy saving Consumption reduction protects environment.Meanwhile the alloying element of addition is relatively fewer, without the national strategies such as Mo, Ni resource, without Nb, V etc. Precious metal element has developed a kind of resource-effective environmentally friendly product.Nanometer bainite abrasion-proof steel ball of the present invention In terms of performance, cost have apparent advantage, the industries such as mine, metallurgy, electric power, building materials and chemical industry application prospect very It is wide.
Description of the drawings
Fig. 1 is the metallographic structure image of the bainite in the embodiment of the present invention 1
Fig. 2 is the metallographic structure image of the bainite in the embodiment of the present invention 2
Fig. 3 is the metallographic structure image of the bainite in the embodiment of the present invention 3
Fig. 4 is the SEM image of the bainite in the embodiment of the present invention 1
Fig. 5 is the SEM image of the bainite in the embodiment of the present invention 2
Fig. 6 is the SEM image of the bainite in the embodiment of the present invention 3
Specific embodiment
Technical scheme of the present invention is described further with reference to specific embodiment.
Embodiment 1：
It smelted, cast first, in accordance with mentioned component range, then detected the ingredient of strand, be shown in Table 1.
The ingredient (wt.%) of 1 strand of table
By the heating strand of a diameter of Φ 300mm to 1150 DEG C of 2h that homogenize, the stick of Φ 80mm is rolled at 1100 DEG C Material, total reduction 73% are organized based on sorbite, and mechanical property is as shown in table 2.
2 mechanical property of table
Above-mentioned bar is heated to 1050 DEG C, forges balling-up at this temperature, final forging temperature is 950 DEG C.Then by steel ball 820~830 DEG C are air-cooled to, is then cooled to 300 DEG C of heat preservation 5h to be more than the cooling rate of 5 DEG C/s, you can form nanometer bainite group It knits, heat treatment process parameter is shown in Table 3.The mechanical property of wear-resistant bainite steel ball is shown in Table 4, and metallograph is shown in Fig. 1, scanned photograph See Fig. 4.
3 heat treatment process parameter of table
4 mechanical property of table
Embodiment 2：
It smelted, cast first, in accordance with mentioned component range, then detected the ingredient of strand, be shown in Table 5.
The ingredient (wt.%) of 5 strand of table
By the heating strand of a diameter of Φ 300mm to 1150 DEG C of 2h that homogenize, the stick of Φ 80mm is rolled at 1100 DEG C Material, total reduction 73% are organized based on sorbite, and mechanical property is as shown in table 6.
6 mechanical property of table
Above-mentioned bar is heated to 1050 DEG C, forges balling-up at this temperature, final forging temperature is 950 DEG C.Then by steel ball 820~830 DEG C are air-cooled to, is then cooled to 300 DEG C of heat preservation 5h to be more than the cooling rate of 5 DEG C/s, you can form bainite structure, heat Treatment process parameter is shown in Table 7.The mechanical property of wear-resistant bainite steel ball is shown in Table 8, and metallograph is shown in Fig. 2, and scanned photograph is shown in Fig. 5.
7 heat treatment process parameter of table
8 mechanical property of table
Embodiment 3：
It smelted, cast first, in accordance with mentioned component range, then detected the ingredient of strand, be shown in Table 9.
The ingredient (wt.%) of 9 strand of table
By the heating strand of a diameter of Φ 300mm to 1150 DEG C of 2h that homogenize, the stick of Φ 80mm is rolled at 1100 DEG C Material, total reduction 73% are organized based on sorbite, and mechanical property is as shown in table 10.
10 mechanical property of table
Above-mentioned bar is heated to 1050 DEG C, forges balling-up at this temperature, final forging temperature is 950 DEG C.Then by steel ball 820~830 DEG C are air-cooled to, is then cooled to 300 DEG C of heat preservation 5h to be more than the cooling rate of 5 DEG C/s, you can form bainite structure, heat Treatment process parameter is shown in Table 11.The mechanical property of wear-resistant bainite steel ball is shown in Table 12, and metallograph is shown in Fig. 3, and scanned photograph is shown in figure 6。
11 heat treatment process parameter of table
12 mechanical property of table
It should be noted last that above example only to the present invention is technical solution and it is unrestricted.Although with reference to reality It applies example the present invention is described in detail, it will be apparent to an ordinarily skilled person in the art that technical scheme of the present invention It is modified or replaced equivalently, without departure from the spirit and scope of technical solution of the present invention, should all cover the present invention's In right.

Claims (7)

  1. A kind of 1. preparation method of low-cost high-strength nanometer bainite abrasion-proof steel ball, which is characterized in that alloying component weight hundred Divide than being C：0.45~0.7wt.%, Si：1.5~3.0wt.%, Mn：0.5~2.0wt.%, Cr：0.1~1.5wt.%, Al： 0.1~2.0wt.%, Ti：0.01~0.1wt.%, surplus are Fe and inevitable impurity；
    Preparation process includes the following steps：
    Step 1 is smelted according to above-mentioned alloying component, is cast, and hot rolling or hot forging are into diameter of phi 20~160mm steel balls, always Reduction ratio is 75~90%；Start rolling temperature or starting forging temperature are 1050~1150 DEG C, finishing temperature or final forging temperature for 950~ 1000℃；
    Above-mentioned steel ball is air-cooled to 800~900 DEG C, is then quickly cooled to 200~400 DEG C, keeps the temperature at this temperature by step 2 3~8h, you can obtain the heterogeneous structure that phase composition is precipitated in nanometer bainite, a small amount of retained austenite and TiC.
  2. 2. the preparation method of wear-resistant bainite steel ball according to claim 1, which is characterized in that add in the alloying component of steel Enter Ti, the TiC precipitated phases for form nano-grade size, being evenly distributed, it is suppressed that the coarse grains of deformed austeaite, crystal grain thinning, Enhance matrix strength simultaneously, improve wear-resisting property.
  3. 3. the preparation method of wear-resistant bainite steel ball according to claim 1, which is characterized in that rolling or forged steel ball are empty It is cooled to 800~900 DEG C, which is higher than the ceiling temperature in perlitic transformation area, while is also at the Precipitation Temperature section of TiC, Purpose is to promote a large amount of precipitations of TiC particles.
  4. 4. the preparation method of wear-resistant bainite steel ball according to claim 1, which is characterized in that the speed that steel ball is quickly cooled down Degree is more than 5 DEG C/s, to avoid perlitic transformation area, overcooling austenite is made to be directly entered bainite transformation area.
  5. 5. the preparation method of wear-resistant bainite steel ball according to claim 1, which is characterized in that steel ball retained austenite group The volume fraction knitted is 5~20%.
  6. 6. the preparation method of wear-resistant bainite steel ball according to claim 1 or 5, which is characterized in that the heat preservation temperature of steel ball Degree is different, and soaking time and corresponding organization and performance are also different, with the reduction of holding temperature, nanometer bainite piece interlayer Away from reduction, intensity and hardness increase, and soaking time also accordingly extends.
  7. 7. the preparation method of wear-resistant bainite steel ball according to claim 1, which is characterized in that the Bainite wear-resisting steel Mechanical property be：Yield strength Rp>=1600MPa, tensile strength Rm>=1900MPa, elongation after fracture A >=10%, Rockwell are hard Spend HRC >=55, room temperature impact toughness ak >=20J/cm2。
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109023117A (en) * 2018-09-30 2018-12-18 武钢集团昆明钢铁股份有限公司 A kind of mining production ore pulp abrasion-proof steel ball and preparation method thereof
CN111485180A (en) * 2020-04-16 2020-08-04 铜陵有色金神耐磨材料有限责任公司 Preparation method of tempered martensite wear-resistant steel ball with TiC particles precipitated in complex phase
CN114686658A (en) * 2022-04-02 2022-07-01 山西海晟科技有限公司 Corrosion-resistant steel ball for ball mill and processing technology thereof
CN114850365A (en) * 2022-04-19 2022-08-05 中国恩菲工程技术有限公司 Bainite-based grinding medium and preparation method and application thereof
CN115011867A (en) * 2022-04-19 2022-09-06 清华大学 High-strength-toughness wear-resistant steel lining plate and preparation method thereof
CN115354232A (en) * 2022-09-06 2022-11-18 广西科技大学 Double-phase wear-resistant steel and preparation method thereof

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CN115354232A (en) * 2022-09-06 2022-11-18 广西科技大学 Double-phase wear-resistant steel and preparation method thereof
CN115354232B (en) * 2022-09-06 2023-08-11 广西科技大学 Double-phase wear-resistant steel and preparation method thereof

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