CN106756619B - A kind of high-toughness high-strength abrasion-proof steel ball and preparation method thereof - Google Patents
A kind of high-toughness high-strength abrasion-proof steel ball and preparation method thereof Download PDFInfo
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- 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
- C21C7/06—Deoxidising, e.g. killing
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
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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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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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
- C22C38/02—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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
Abstract
The invention discloses a kind of high-toughness high-strength abrasion-proof steel ball, chemical composition includes by weight percentage：C：0.35 0.47%, Si：0.25 0.4%, Mn：2 3%, Cu：0.03 0.04%, Cr：1 1.5%, B：0.003 0.005%, Mg：0.03 0.06%, Ti：0.01 0.03%, Zr：0.02 0.04%, Nb：0.01 0.03%, V：0.05 0.1%, Mo：0.05 0.2%, Ni：0.1 0.25%, Ca+Ba：0.015 0.018%, S：0.01 0.02%, P：0.01 0.02%, remaining is Fe and inevitable impurity.The invention also provides the preparation methods of abrasion-proof steel ball, and process is simple, and obtained abrasion-proof steel ball toughness, intensity, wearability is good.
Description
Technical field
The present invention relates to wear-resistant material technical field more particularly to a kind of high-toughness high-strength abrasion-proof steel ball and its preparation sides
Method.
Background technology
Capital equipment of the ball mill as material grinding in mine, cement industry, obtains extensive popularization and application, therein
Ball mill steel ball is the important expendable material of ball mill operation work, and principle is impact using wear-resistant ball and material and grinds
Mill effect makes crushing material, the quality of wear-resistant ball directly affect the crushing quality of material to be comminuted, and the service life of wear-resistant ball is straight
Influence labor productivity is connect, so the requirement to wear-resistant ball is that should have enough intensity and hardness, is had again preferable anti-
Impact flexibility.In the prior art, mill Jie's steel ball of ball mill is mainly the ball millings such as chromium alloy, Mn series alloy steel-casting or ball milling
Ironcasting, such as high chrome ball, low-chrome steel ball, multicomponent alloy steel ball and vanadium-titanium-chromium alloy steel ball exist during use
Impact flexibility be not very well, intensity is relatively low, wear-resisting property is not good enough defect.
Invention content
Technical problems based on background technology, the present invention propose a kind of high-toughness high-strength abrasion-proof steel ball and its system
Preparation Method, the preparation method of the high-toughness high-strength abrasion-proof steel ball, process is simple, mild condition, obtained abrasion-resistant stee
Pellet impact good toughness, intensity is high, and wear-resisting property is excellent.
A kind of high-toughness high-strength abrasion-proof steel ball proposed by the present invention, chemical composition include by weight percentage：C：
0.35-0.47%, Si：0.25-0.4%, Mn：2-3%, Cu：0.03-0.04%, Cr：1-1.5%, B：0.003-0.005%,
Mg：0.03-0.06%, Ti：0.01-0.03%, Zr：0.02-0.04%, Nb：0.01-0.03%, V：0.05-0.1%, Mo：
0.05-0.2%, Ni：0.1-0.25%, Ca+Ba：0.015-0.018%, S：0.01-0.02%, P：0.01-0.02%, remaining
For Fe and inevitable impurity.
Preferably, in chemical composition, the weight percent of Mn, B, Cr meet following relationship：Mn=500 × B+0.15
× Cr, and Cr+Mn >=3.4%.
Preferably, in chemical composition, the weight percent of Nb, B, Ti meet following relationship：Ti=kB+Nb, and k takes
3-5。
Preferably, in chemical composition, the weight percent of Nb, V meet relational expression：0.09%≤Nb+V≤0.11%.
Preferably, the weight ratio of Ca, Ba are 2-10 in chemical composition:3-8.
A kind of preparation method for high-toughness high-strength abrasion-proof steel ball that the present invention also proposes, includes the following steps：
S1, it adds raw materials into and carries out melting in vaccum sensitive stove, skim, obtain aluminium alloy after deoxidation；
S2, it is poured into metal die cavity after aluminium alloy is cooled to 1430-1450 DEG C, waits for that aluminium alloy temperature is down to
It is taken out at 900-950 DEG C, is cooled to room temperature to obtain wear-resistant ball green body；
S3, wear-resistant ball green body is warming up to 880-900 DEG C, keeps the temperature 40-55min, be cooled to 250-300 DEG C then in 350-
30-50min is kept the temperature in 360 DEG C, is tempered after air-cooled and is obtained the high-toughness high-strength abrasion-proof steel ball.
Preferably, in S1, during deoxidation, the raw material of used deoxidier includes by weight：Bauxite
35-50 parts, 10-15 parts of calcium powder, 5-20 parts of iron powder, 2-10 parts of silica, 1-5 parts of barite, 2-10 parts of coke；The deoxidier choosing
It has selected bauxite, calcium powder, iron powder, silica, barite, coke to be raw material, and have adjusted ratio of each raw material in system, make each
The performance of raw material cooperates with, and has higher strong and power with oxygen, while having higher desulphurizing ability, is played while deoxidation
The effect of desulfurization, compared with similar deoxidier, molten steel total oxygen content is low, and deoxidation products, which is mutually built up, grows up, and floats fast；It is pressed from both sides in steel
Sundries content is reduced, while can make inclusion modification, good fluidity when molten steel is cast, while bauxite having been used to replace metal
Aluminium reduces cost.
Preferably, in S3, during being warming up to 880-900 DEG C, heating rate is A DEG C/s, A=1.3+K1×CCr+
K2×CMn, wherein K1Take 50-100, K2Take 30-50, CCr、CMnThe weight percent of respectively Cr and Mn.
Preferably, in S3, during being cooled to 250-300 DEG C, cooling rate is B DEG C/s, B=0.8+K3×CCr+
K4×CMn, wherein K3Take 100-200, K4Take 30-80, CCr、CMnThe respectively weight percent of Cr, Mn.
Preferably, in S3, the temperature of tempering is T DEG C, and T=328+K5×CTi+K6×CNb, wherein K5Take 20000-
35000, K6Take 25000-40000, CTi、CNbThe respectively weight percent of Ti, Nb.
High-toughness high-strength abrasion-proof steel ball of the present invention has properly increased the content of C in chemical composition, has prevented material
After material quenching under the premise of workpiece cracking, the impact flexibility of material is improved, while adding Mn and Cr, and properly increased Mn
With the content of Cr, while the content of Mo is reduced, significantly improves the quenching degree and temper resistance of material, while making addition
Mn is matched with B, under the premise of preventing boron crisp, it is suppressed that the transformation of polygonal ferrite, while bainite transformation area is protruded,
Bei-horse tissue is obtained in wide range, while the weight percent for controlling Mn, B, Cr meets following relationship：Mn=500 ×
B+0.15 × Cr, and Cr+Mn >=3.4% make Mn, B, Cr triplicity so that high temperature transformation incubation period is considerably longer than medium temperature and turns
Become, to refine the size of material, significantly improves the intensity and toughness of steel ball；In Nb and B addition systems, bayesian is reduced
The transition temperature of body has further refined tissue, improves matrix Dislocations density, and add a certain amount of Ti, and make Nb,
B, the weight percent of Ti meets following relationship：Ti=kB+Nb, and k takes 3-5, to make Nb, B, Ti that there is optimal collaboration
Performance avoids N's and B from being in combination with the simultaneously formed TiN and NbN, plays the role of solidifying core, promotes steel ball microscopic structure
Refinement, further improve the intensity and toughness of steel ball, while preventing the formation of coarse field trash；Simultaneously add Ca and
Ba, and by the control of the content of Ca+Ba in the range of 0.015-0.018%, play the role of refining steel ball, make gained steel ball
More rounding, while being conducive to improve the intensity and toughness of steel ball；In preparation method, the temperature for being specifically chosen quenching is 880-
900 DEG C, 40-45min is kept the temperature, in addition, controlling the rate of the rate and cooling that heat up in quenching process, keeps heating rate A full
Sufficient A=1.3+K1CCr+K2CMn, K1Take 50-100, K230-50, rate of temperature fall B is taken to meet B=0.8+K3CCr+K4CMn, K3Take 100-
200, K430-80 is taken, so that pearlite is precipitated and reduces, martensitic structure gradually increases, and hardness increases, and makes hardness and the impact of steel ball
Toughness is optimal, and increases the stability that Cooling Austenite Transformation is martensite, enhances the quenching degree of steel, improve through hardening
The hardness of layer；Tissue starts to refine after more than 900 DEG C, and hardness and impact flexibility continuously decrease；It is cooled to 250-300 later
DEG C, cooling speed is controlled, and keep the temperature 30-50min in 350-360 DEG C, avoids the transformation of non-martensite class loading, assign
Steel ball optimum performance；In preferred embodiment, by the relational expression that the temperature of tempering is the weight percent for being set as Ti, Nb, i.e. T=
328+K5×CTi+K6×CNb, wherein K5Take 20000-35000, K6Take 25000-40000, CTi、CNbThe respectively weight of Ti, Nb
Percentage has also appeared a small amount of (Nb, Ti) to make the precipitate of tissue other than the ε-carbide for having a large amount of Dispersed precipitates
(C, N) particle, the appearance of this two classes precipitation particles make gained abrasion-proof steel ball while keeping high intensity and hardness, still
So there is preferable toughness, guarantee is provided to have high wear-resisting property for it.
High-toughness high-strength abrasion-proof steel ball of the present invention is tested for the property, hardness 49-56HRC, impact is tough
Property is 31-36J/cm2, comprehensive performance is good.
Specific implementation mode
In the following, technical scheme of the present invention is described in detail by specific embodiment.
Embodiment 1
A kind of high-toughness high-strength abrasion-proof steel ball proposed by the present invention, chemical composition include by weight percentage：C：
0.47%, Si：0.25%, Mn：3%, Cu：0.03%, Cr：1.5%, B：0.003%, Mg：0.06%, Ti：0.01%, Zr：
0.04%, Nb：0.03%, V：0.05%, Mo：0.2%, Ni：0.1%, Ca+Ba：0.018%, S：0.01%, P：0.02%,
Remaining is Fe and inevitable impurity.
A kind of preparation method for high-toughness high-strength abrasion-proof steel ball that the present invention also proposes, includes the following steps：
S1, it adds raw materials into and carries out melting in vaccum sensitive stove, skim, obtain aluminium alloy after deoxidation；
S2, it is poured into metal die cavity after aluminium alloy is cooled to 1430 DEG C, when aluminium alloy temperature is down to 950 DEG C
It takes out, is cooled to room temperature to obtain wear-resistant ball green body；
S3, wear-resistant ball green body is warming up to 880 DEG C, keeps the temperature 55min, be cooled to 250 DEG C and then kept the temperature in 360 DEG C
50min is tempered after air-cooled and obtains the high-toughness high-strength abrasion-proof steel ball.
Embodiment 2
A kind of high-toughness high-strength abrasion-proof steel ball proposed by the present invention, chemical composition include by weight percentage：C：
0.35%, Si：0.4%, Mn：2%, Cu：0.04%, Cr：1%, B：0.005%, Mg：0.03%, Ti：0.03%, Zr：
0.02%, Nb：0.01%, V：0.1%, Mo：0.05%, Ni：0.25%, Ca+Ba：0.015%, S：0.02%, P：0.01%,
Remaining is Fe and inevitable impurity.
A kind of preparation method for high-toughness high-strength abrasion-proof steel ball that the present invention also proposes, includes the following steps：
S1, it adds raw materials into and carries out melting in vaccum sensitive stove, skim, obtain aluminium alloy after deoxidation；
S2, it is poured into metal die cavity after aluminium alloy is cooled to 1450 DEG C, when aluminium alloy temperature is down to 900 DEG C
It takes out, is cooled to room temperature to obtain wear-resistant ball green body；
S3, wear-resistant ball green body is warming up to 900 DEG C, keeps the temperature 40min, be cooled to 300 DEG C and then kept the temperature in 350 DEG C
30min is tempered after air-cooled and obtains the high-toughness high-strength abrasion-proof steel ball.
Embodiment 3
A kind of high-toughness high-strength abrasion-proof steel ball proposed by the present invention, chemical composition include by weight percentage：C：
0.43%, Si：0.28%, Mn：2.01%, Cu：0.031%, Cr：1.4%, B：0.0036%, Mg：0.055%, Ti：
0.0258%, Zr：0.028%, Nb：0.015%, V：0.08%, Mo：0.17%, Ni：0.16%, Ca：0.013%, Ba：
0.004%, S：0.018%, P：0.013%, remaining is Fe and inevitable impurity.
A kind of preparation method for high-toughness high-strength abrasion-proof steel ball that the present invention also proposes, includes the following steps：
S1, it adds raw materials into and carries out melting in vaccum sensitive stove, skim, obtain aluminium alloy after deoxidation；Wherein, in deoxidation
In the process, the raw material of used deoxidier includes by weight：50 parts of bauxite, 10 parts of calcium powder, 20 parts of iron powder, 2 parts of silica,
5 parts of barite, 2 parts of coke；
S2, it is poured into metal die cavity after aluminium alloy is cooled to 1435 DEG C, when aluminium alloy temperature is down to 940 DEG C
It takes out, is cooled to room temperature to obtain wear-resistant ball green body；
S3, wear-resistant ball green body is warming up to 885 DEG C, keeps the temperature 52min, be cooled to 260 DEG C and then kept the temperature in 358 DEG C
36min is tempered after air-cooled and obtains the high-toughness high-strength abrasion-proof steel ball；
Wherein, during being warming up to 885 DEG C, heating rate is A DEG C/s, A=1.3+K1×CCr+K2×CMn, wherein K1
Take 50, K2Take 50, CCr、CMnThe weight percent of respectively Cr and Mn, i.e., A=3.005 DEG C/s；
During being cooled to 260 DEG C, cooling rate is B DEG C/s, B=0.8+K3×CCr+K4×CMn, wherein K3It takes
200, K4Take 30, CCr、CMnThe respectively weight percent of Cr, Mn, i.e., B=4.203 DEG C/s；
The temperature of tempering is T DEG C, and T=328+K5×CTi+K6×CNb, wherein K5Take 35000, K6Take 40000, CTi、CNb
The respectively weight percent of Ti, Nb, i.e., T=343.03 DEG C.
Embodiment 4
A kind of high-toughness high-strength abrasion-proof steel ball proposed by the present invention, chemical composition include by weight percentage：C：
0.36%, Si：0.37%, Mn：2.213%, Cu：0.038%, Cr：1.42%, B：0.004%, Mg：0.037%, Ti：
0.03%, Zr：0.036%, Nb：0.01%, V：0.085%, Mo：0.1%, Ni：0.22%, Ca：0.0032%, Ba：
0.0128%, S：0.015%, P：0.017%, remaining is Fe and inevitable impurity.
A kind of preparation method for high-toughness high-strength abrasion-proof steel ball that the present invention also proposes, includes the following steps：
S1, it adds raw materials into and carries out melting in vaccum sensitive stove, skim, obtain aluminium alloy after deoxidation；Wherein, in deoxidation
In the process, the raw material of used deoxidier includes by weight：35 parts of bauxite, 15 parts of calcium powder, 5 parts of iron powder, 10 parts of silica,
1 part of barite, 10 parts of coke；
S2, it is poured into metal die cavity after aluminium alloy is cooled to 1445 DEG C, when aluminium alloy temperature is down to 920 DEG C
It takes out, is cooled to room temperature to obtain wear-resistant ball green body；
S3, wear-resistant ball green body is warming up to 896 DEG C, keeps the temperature 43min, be cooled to 287 DEG C and then kept the temperature in 352 DEG C
43min is tempered after air-cooled and obtains the high-toughness high-strength abrasion-proof steel ball；
Wherein, during being warming up to 896 DEG C, heating rate is A DEG C/s, A=1.3+K1×CCr+K2×CMn, wherein K1
Take 100, K2Take 30, CCr、CMnThe weight percent of respectively Cr and Mn, i.e., A=3.3839 DEG C/s；
During being cooled to 287 DEG C, cooling rate is B DEG C/s, B=0.8+K3×CCr+K4×CMn, wherein K3It takes
100, K4Take 80, CCr、CMnThe respectively weight percent of Cr, Mn, i.e., B=3.9904 DEG C/s；
The temperature of tempering is T DEG C, and T=328+K5×CTi+K6×CNb, wherein K5Take 20000, K6Take 25000, CTi、CNb
The respectively weight percent of Ti, Nb, i.e., T=336.5 DEG C.
Embodiment 5
A kind of high-toughness high-strength abrasion-proof steel ball proposed by the present invention, chemical composition include by weight percentage：C：
0.38%, Si：0.32%, Mn：2.195%, Cu：0.035%, Cr：1.3%, B：0.004%, Mg：0.045%, Ti：
0.028%, Zr：0.03%, Nb：0.01%, V：0.08%, Mo：0.16%, Ni：0.16%, Ca：0.008%, Ba：
0.008%, S：0.01%, P：0.02%, remaining is Fe and inevitable impurity.
A kind of preparation method for high-toughness high-strength abrasion-proof steel ball that the present invention also proposes, includes the following steps：
S1, it adds raw materials into and carries out melting in vaccum sensitive stove, skim, obtain aluminium alloy after deoxidation；Wherein, in deoxidation
In the process, the raw material of used deoxidier includes by weight：42 parts of bauxite, 13 parts of calcium powder, 10 parts of iron powder, 8 parts of silica,
3 parts of barite, 7 parts of coke；
S2, it is poured into metal die cavity after aluminium alloy is cooled to 1440 DEG C, when aluminium alloy temperature is down to 930 DEG C
It takes out, is cooled to room temperature to obtain wear-resistant ball green body；
S3, wear-resistant ball green body is warming up to 890 DEG C, keeps the temperature 50min, be cooled to 280 DEG C and then kept the temperature in 355 DEG C
40min is tempered after air-cooled and obtains the high-toughness high-strength abrasion-proof steel ball；
Wherein, during being warming up to 890 DEG C, heating rate is A DEG C/s, A=1.3+K1×CCr+K2×CMn, wherein K1
Take 60, K2Take 40, CCr、CMnThe weight percent of respectively Cr and Mn, i.e., A=2.958 DEG C/s；
During being cooled to 280 DEG C, cooling rate is B DEG C/s, B=0.8+K3×CCr+K4×CMn, wherein K3It takes
160, K4Take 50, CCr、CMnThe respectively weight percent of Cr, Mn, i.e., B=3.9775 DEG C/s；
The temperature of tempering is T DEG C, and T=328+K5×CTi+K6×CNb, wherein K5Take 30000, K6Take 30000, CTi、CNb
The respectively weight percent of Ti, Nb, i.e., T=339.4 DEG C.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (7)
1. a kind of high-toughness high-strength abrasion-proof steel ball, which is characterized in that its chemical composition includes by weight percentage：C：0.35-
0.47%, Si：0.25-0.4%, Mn：2-3%, Cu：0.03-0.04%, Cr：1-1.5%, B：0.003-0.005%, Mg：
0.03-0.06%, Ti：0.01-0.03%, Zr：0.02-0.04%, Nb：0.01-0.03%, V：0.05-0.1%, Mo：
0.05-0.2%, Ni：0.1-0.25%, Ca+Ba：0.015-0.018%, S：0.01-0.02%, P：0.01-0.02%, remaining
For Fe and inevitable impurity；
In its chemical composition, the weight percent of Mn, B, Cr meet following relationship：Mn=500 × B+0.15 × Cr, and Cr+
Mn >=3.4%；The weight percent of Nb, B, Ti meet following relationship：Ti=kB+Nb, and k takes 3-5；The weight percent of Nb, V
Than meeting relational expression：0.09%≤Nb+V≤0.11%.
2. high-toughness high-strength abrasion-proof steel ball according to claim 1, which is characterized in that the weight of Ca, Ba in its chemical composition
Amount is than being 2-10:3-8.
3. a kind of preparation method of high-toughness high-strength abrasion-proof steel ball as claimed in claim 1 or 2, which is characterized in that including with
Lower step：
S1, it adds raw materials into and carries out melting in vaccum sensitive stove, skim, obtain aluminium alloy after deoxidation；
S2, it is poured into metal die cavity after aluminium alloy is cooled to 1430-1450 DEG C, waits for that aluminium alloy temperature is down to 900-
It is taken out at 950 DEG C, is cooled to room temperature to obtain wear-resistant ball green body；
S3, wear-resistant ball green body is warming up to 880-900 DEG C, keeps the temperature 40-55min, be cooled to 250-300 DEG C then in 350-360
30-50min is kept the temperature in DEG C, is tempered after air-cooled and is obtained the high-toughness high-strength abrasion-proof steel ball.
4. the preparation method of high-toughness high-strength abrasion-proof steel ball according to claim 3, which is characterized in that in S1, de-
During oxygen, the raw material of used deoxidier includes by weight：35-50 parts of bauxite, 10-15 parts of calcium powder, iron powder 5-
20 parts, 2-10 parts of silica, 1-5 parts of barite, 2-10 parts of coke.
5. according to the preparation method of the high-toughness high-strength abrasion-proof steel ball of claim 3 or 4, which is characterized in that in S3, rise
For temperature to during 880-900 DEG C, heating rate is A DEG C/s, A=1.3+K1×CCr+K2×CMn, wherein K1Take 50-100, K2
Take 30-50, CCr、CMnThe weight percent of respectively Cr and Mn.
6. according to the preparation method of any one of the claim 3-5 high-toughness high-strength abrasion-proof steel balls, which is characterized in that
In S3, during being cooled to 250-300 DEG C, cooling rate is B DEG C/s, B=0.8+K3×CCr+K4×CMn, wherein K3It takes
100-200, K4Take 30-80, CCr、CMnThe respectively weight percent of Cr, Mn.
7. according to the preparation method of any one of the claim 3-6 high-toughness high-strength abrasion-proof steel balls, which is characterized in that
In S3, the temperature of tempering is T DEG C, and T=328+K5×CTi+K6×CNb, wherein K5Take 20000-35000, K6Take 25000-
40000,CTi、CNbThe respectively weight percent of Ti, Nb.
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| CN107904518A (en) * | 2017-11-24 | 2018-04-13 | 蚌埠市光辉金属加工厂 | A kind of high tenacity is low to wear away wear-resistant ball and preparation method thereof |
| CN109023089B (en) * | 2018-09-07 | 2020-08-04 | 安徽省宁国市宁沪钢球有限公司 | High-toughness low-abrasion wear-resistant ball for ball mill and preparation method thereof |
| CN109023088B (en) * | 2018-09-07 | 2020-08-21 | 安徽省宁国市宁沪钢球有限公司 | Wear-resistant steel forging for ball mill and preparation method thereof |
| CN115090384A (en) * | 2022-07-14 | 2022-09-23 | 江苏首盾耐磨材料有限公司 | Wear-resistant steel ball for ball mill |
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