CN105331902A - Low-chromium wear-resisting steel ball - Google Patents
Low-chromium wear-resisting steel ball Download PDFInfo
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- CN105331902A CN105331902A CN201510760367.8A CN201510760367A CN105331902A CN 105331902 A CN105331902 A CN 105331902A CN 201510760367 A CN201510760367 A CN 201510760367A CN 105331902 A CN105331902 A CN 105331902A
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Abstract
The invention discloses a low-chromium wear-resisting steel ball. The low-chromium wear-resisting steel ball comprises, by weight, 0.7%-0.9% of C, 0.3%-0.5% of S, 0.8%-1% of Mn, 0.9%-1.1% of Cr, 0.07%-0.09% of Ni, 0.07%-0.09% of Mo, 0.03%-0.04% of Al, 0.3%-0.5% of Cu, 0.0005%-0.002% of B, 0.19%-0.21% of V, 0.01%-0.014% of P, 0.001%-0.0012% of S and the balance Fe. The low-chromium wear-resisting steel ball is high in wear resistance, good in toughness, high in impact resistance, resistant to corrosion and low in cost.
Description
Technical field
The present invention relates to grinding machinery technical field, particularly relate to a kind of low chromium abrasion-proof steel ball.
Background technology
Abrasion-proof steel ball has been widely used in the industrial production such as metallurgy, ore dressing, building materials, chemical industry, electric power.At present, use more abrasion-proof steel ball to have low alloy steel cast ball, chrome alloy cast iron ball, steel alloy forging rolling ball etc., but these abrasion-proof steel balls in use still also exist many problems.As: while the hardness improving abrasion-proof steel ball, its toughness is reduced, causes percentage of damage to raise; Increase the content of alloying element, can hardening capacity be improved, the hardness of abrasion-proof steel ball be increased, but can production cost be increased simultaneously.Along with ball mill is to the development in maximization direction, higher requirement is proposed to the hardness of abrasion-proof steel ball and size.Current large diameter abrasion-proof steel ball, the easily galvanic etching because of wet-milling, and also major diameter high-chromium cast ball is easily broken, and therefore research and develop wear resistance high, high tenacity, low cost, corrosion resistant Large-diameter wear-resistant steel ball becomes the task of top priority.
Summary of the invention
Based on the technical problem that background technology exists, the present invention proposes a kind of low chromium abrasion-proof steel ball, wear resistance of the present invention is high, good toughness, and shock resistance is high, corrosion-resistant, and cost is low.
The low chromium abrasion-proof steel ball of one that the present invention proposes, the weight percent of its each component is as follows: C:0.7-0.9%, Si:0.3-0.5%, Mn:0.8-1%, Cr:0.9-1.1%, Ni:0.07-0.09%, Mo:0.07-0.09%, Al:0.03-0.04%, Cu:0.3-0.5%, B:0.0005-0.002%, V:0.19-0.21%, P:0.01-0.014%, S:0.001-0.0012%, clout is Fe;
In preparation process, prepare described low chromium abrasion-proof steel ball according to following processing step:
S1, melting: steel scrap is added in ladle and toasts, fusing, inspection, adds carbon, chromium, silicon, manganese, nickel, molybdenum, aluminium, copper, boron, vanadium, and thick refining, refining, continuous casting, rolling obtain the hot rolled circular steel that composition meets above-mentioned scope;
S2, to forge: get the hot rolled circular steel obtained in S1, be warming up to 800-900 DEG C, insulation 35-45min, is warming up to 1000-1100 DEG C, insulation 35-45min, cut into material section, forge 25-30 time, adjust the temperature to 950-1000 DEG C, insulation 35-45min, forge 30-40 time, air-cooledly obtain the spherical forging of smooth surface to room temperature;
S3, thermal treatment: get the spherical forging obtained in S2, be warming up to 900-950 DEG C, insulation 20-40min, uses water quenching 5-7min, adjusts the temperature to 550-600 DEG C, and insulation 1-2h, is cooled to room temperature and obtains low chromium abrasion-proof steel ball.
Preferably, the diameter of abrasion-proof steel ball is 120-160mm.
Preferably, the weight percent of its each component is as follows: C:0.75-0.85%; Si:0.35-0.45%; Mn:0.85-0.95%; Cr:0.95-1.05%; Ni:0.075-0.085%; Mo:0.075-0.085%; Al:0.032-0.038%; Cu:0.35-0.45%; B:0.001-0.0015%; V:0.195-0.205%; P:0.01-0.012%; S:0.001-0.0011%; Clout is Fe.
Preferably, the weight percent of its each component is as follows: C:0.8%; Si:0.4%; Mn:0.9%; Cr:1%; Ni:0.08%; Mo:0.08%; Al:0.035%; Cu:0.4%; B:0.0013%; V:0.2%; P:0.01%; S:0.001%; Clout is Fe.
Preferably, in S2, get the hot rolled circular steel obtained in S1, be warming up to 830-870 DEG C, insulation 38-42min, is warming up to 1030-1070 DEG C with the speed of 10-30 DEG C/s, insulation 38-42min, cut into material section, forge 25-30 time, adjust the temperature to 960-980 DEG C, insulation 38-42min, forge 30-40 time, air-cooledly obtain the spherical forging of smooth surface to room temperature.
Preferably, in S3, get the spherical forging obtained in S2, add in rotary heating furnace, be warming up to 920-940 DEG C, insulation 25-35min, uses water quenching 5.5-6.5min, adjusts the temperature to 560-580 DEG C, and insulation 1.2-1.8h, is cooled to room temperature and obtains low chromium abrasion-proof steel ball.
Preferably, in S3, the temperature of quenching water is 30-45 DEG C.
The present invention selects cheap C to improve hardening capacity and the hardenability of abrasion-proof steel ball, thus improves the wear resistance of abrasion-proof steel ball and reduce cost; Si can improve the temper resistance of abrasion-proof steel ball, prevents the grain coarsening of steel ball; The hardening capacity that Mn, Cr, Mo, B can increase abrasion-proof steel ball is added in mixing, increases hardness and wear resistance, improves impelling strength; Mo, Al are added in mixing can make abrasion-proof steel ball reach the object of crystal grain thinning by thermal treatment, has better wear resistance, can increase deoxidation effect simultaneously, improve antioxidant property of the present invention; The content of control P, S, at lower level, can suppress the transition of abrasion-proof steel ball over-all properties to worsen; Ni, V are added in mixing can improve the toughness of steel ball by crystal grain thinning, reduces the velocity of diffusion of element in critical transition temperature and steel, thus improves the hardening capacity of steel ball, increase hardness and wear resistance; Cu can increase the corrosion resistance nature of steel ball; Various alloy cooperatively interacts, and while increasing hardness of the present invention and wear resistance, reduces the content of chromium, reduces cost; The total content of alloy is lower can be cost-saving; Devising rational preparation technology makes the present invention have good wear resistance, toughness, shock resistance, and simple to operate being beneficial to is commercially produced.
Embodiment
Below, by specific embodiment, technical scheme of the present invention is described in detail.
Embodiment 1
A kind of diameter is the low chromium abrasion-proof steel ball of 120mm, and the weight percent of its each component is as follows: C:0.9%, Si:0.3%, Mn:1%, Cr:0.9%, Ni:0.09%, Mo:0.07%, Al:0.04%, Cu:0.3%, B:0.002%, V:0.19%, P:0.014%, S:0.001%, clout is Fe;
In preparation process, prepare described low chromium abrasion-proof steel ball according to following processing step:
S1, melting: steel scrap is added in ladle and toasts, fusing, inspection, adds carbon, chromium, silicon, manganese, nickel, molybdenum, aluminium, copper, boron, vanadium, and thick refining, refining, continuous casting, rolling obtain the hot rolled circular steel that composition meets above-mentioned scope;
S2, to forge: get the hot rolled circular steel obtained in S1, be warming up to 900 DEG C, insulation 35min, is warming up to 1000 DEG C with the speed of 30 DEG C/s, insulation 45min, cuts into material section, forges 25 times, adjust the temperature to 1000 DEG C, insulation 35min, forges 40 times, air-cooledly obtains the spherical forging of smooth surface to room temperature;
S3, thermal treatment: get the spherical forging obtained in S2, add in rotary heating furnace, be warming up to 900 DEG C, insulation 40min, is the water quenching 7min of 30 DEG C by temperature, adjusts the temperature to 550 DEG C, and insulation 2h, is cooled to room temperature and obtains low chromium abrasion-proof steel ball.
Embodiment 2
A kind of diameter is the low chromium abrasion-proof steel ball of 160mm, and the weight percent of its each component is as follows: C:0.7%, Si:0.5%, Mn:0.8%, Cr:1.1%, Ni:0.07%, Mo:0.09%, Al:0.03%, Cu:0.5%, B:0.0005%, V:0.21%, P:0.01%, S:0.0012%, clout is Fe;
In preparation process, prepare described low chromium abrasion-proof steel ball according to following processing step:
S1, melting: steel scrap is added in ladle and toasts, fusing, inspection, adds carbon, chromium, silicon, manganese, nickel, molybdenum, aluminium, copper, boron, vanadium, and thick refining, refining, continuous casting, rolling obtain the hot rolled circular steel that composition meets above-mentioned scope;
S2, to forge: get the hot rolled circular steel obtained in S1, be warming up to 800 DEG C, insulation 45min, is warming up to 1100 DEG C with the speed of 10 DEG C/s, insulation 35min, cuts into material section, forges 30 times, adjust the temperature to 950 DEG C, insulation 45min, forges 30 times, air-cooledly obtains the spherical forging of smooth surface to room temperature;
S3, thermal treatment: get the spherical forging obtained in S2, add in rotary heating furnace, be warming up to 950 DEG C, insulation 20min, is the water quenching 5min of 45 DEG C by temperature, adjusts the temperature to 600 DEG C, and insulation 1h, is cooled to room temperature and obtains low chromium abrasion-proof steel ball.
Embodiment 3
A kind of diameter is the low chromium abrasion-proof steel ball of 130mm, and the weight percent of its each component is as follows: C:0.85%; Si:0.35%; Mn:0.95%; Cr:0.95%; Ni:0.085%; Mo:0.075%; Al:0.038%; Cu:0.35%; B:0.0015%; V:0.195%; P:0.012%; S:0.001%; Clout is Fe;
In preparation process, prepare described low chromium abrasion-proof steel ball according to following processing step:
S1, melting: steel scrap is added in ladle and toasts, fusing, inspection, adds carbon, chromium, silicon, manganese, nickel, molybdenum, aluminium, copper, boron, vanadium, and thick refining, refining, continuous casting, rolling obtain the hot rolled circular steel that composition meets above-mentioned scope;
S2, to forge: get the hot rolled circular steel obtained in S1, be warming up to 870 DEG C, insulation 38min, is warming up to 1030 DEG C with the speed of 25 DEG C/s, insulation 42min, cuts into material section, forges 27 times, adjust the temperature to 980 DEG C, insulation 38min, forges 38 times, air-cooledly obtains the spherical forging of smooth surface to room temperature;
S3, thermal treatment: get the spherical forging obtained in S2, add in rotary heating furnace, be warming up to 920 DEG C, insulation 35min, is the water quenching 6.5min of 35 DEG C by temperature, adjusts the temperature to 560 DEG C, and insulation 1.8h, is cooled to room temperature and obtains low chromium abrasion-proof steel ball.
Embodiment 4
A kind of diameter is the low chromium abrasion-proof steel ball of 150mm, and the weight percent of its each component is as follows: C:0.75%; Si:0.45%; Mn:0.85%; Cr:1.05%; Ni:0.075%; Mo:0.085%; Al:0.032%; Cu:0.45%; B:0.001%; V:0.205%; P:0.01%; S:0.0011%; Clout is Fe;
In preparation process, prepare described low chromium abrasion-proof steel ball according to following processing step:
S1, melting: steel scrap is added in ladle and toasts, fusing, inspection, adds carbon, chromium, silicon, manganese, nickel, molybdenum, aluminium, copper, boron, vanadium, and thick refining, refining, continuous casting, rolling obtain the hot rolled circular steel that composition meets above-mentioned scope;
S2, to forge: get the hot rolled circular steel obtained in S1, be warming up to 830 DEG C, insulation 42min, is warming up to 1070 DEG C with the speed of 15 DEG C/s, insulation 38min, cuts into material section, forges 29 times, adjust the temperature to 960 DEG C, insulation 42min, forges 32 times, air-cooledly obtains the spherical forging of smooth surface to room temperature;
S3, thermal treatment: get the spherical forging obtained in S2, add in rotary heating furnace, be warming up to 940 DEG C, insulation 25min, is the water quenching 5.5min of 40 DEG C by temperature, adjusts the temperature to 580 DEG C, and insulation 1.2h, is cooled to room temperature and obtains low chromium abrasion-proof steel ball.
Embodiment 5
A kind of diameter is the low chromium abrasion-proof steel ball of 140mm, and the weight percent of its each component is as follows: C:0.8%; Si:0.4%; Mn:0.9%; Cr:1%; Ni:0.08%; Mo:0.08%; Al:0.035%; Cu:0.4%; B:0.0013%; V:0.2%; P:0.01%; S:0.001%; Clout is Fe;
In preparation process, prepare described low chromium abrasion-proof steel ball according to following processing step:
S1, melting: steel scrap is added in ladle and toasts, fusing, inspection, adds carbon, chromium, silicon, manganese, nickel, molybdenum, aluminium, copper, boron, vanadium, and thick refining, refining, continuous casting, rolling obtain the hot rolled circular steel that composition meets above-mentioned scope;
S2, to forge: get the hot rolled circular steel obtained in S1, be warming up to 850 DEG C, insulation 40min, is warming up to 1050 DEG C with the speed of 20 DEG C/s, insulation 40min, cuts into material section, forges 28 times, adjust the temperature to 970 DEG C, insulation 40min, forges 35 times, air-cooledly obtains the spherical forging of smooth surface to room temperature;
S3, thermal treatment: get the spherical forging obtained in S2, add in rotary heating furnace, be warming up to 930 DEG C, insulation 30min, is the water quenching 6min of 37 DEG C by temperature, adjusts the temperature to 570 DEG C, and insulation 1.5h, is cooled to room temperature and obtains low chromium abrasion-proof steel ball.
Test embodiment 1-5, detected result sees the following form:
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| Steel ball surface hardness (HRC) | 61.8 | 62.4 | 62.7 | 63.1 | 63.7 |
| Steel ball centre hardness (HRC) | 42.6 | 42.3 | 43.7 | 44 | 44.5 |
| Impelling strength (J) | 84.8 | 80.2 | 88.2 | 90.4 | 96.6 |
| 8m height ball falling impact fatigue lifetime (secondary) | 2502 | 2510 | 2518 | 2524 | 2531 |
The present invention has good wear resisting property, toughness, shock resistance as seen from the above table.
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (7)
1. a low chromium abrasion-proof steel ball, is characterized in that, the weight percent of its each component is as follows: C:0.7-0.9%, Si:0.3-0.5%, Mn:0.8-1%, Cr:0.9-1.1%, Ni:0.07-0.09%, Mo:0.07-0.09%, Al:0.03-0.04%, Cu:0.3-0.5%, B:0.0005-0.002%, V:0.19-0.21%, P:0.01-0.014%, S:0.001-0.0012%, clout is Fe;
In preparation process, prepare described low chromium abrasion-proof steel ball according to following processing step:
S1, melting: steel scrap is added in ladle and toasts, fusing, inspection, adds carbon, chromium, silicon, manganese, nickel, molybdenum, aluminium, copper, boron, vanadium, and thick refining, refining, continuous casting, rolling obtain the hot rolled circular steel that composition meets above-mentioned scope;
S2, to forge: get the hot rolled circular steel obtained in S1, be warming up to 800-900 DEG C, insulation 35-45min, is warming up to 1000-1100 DEG C, insulation 35-45min, cut into material section, forge 25-30 time, adjust the temperature to 950-1000 DEG C, insulation 35-45min, forge 30-40 time, air-cooledly obtain the spherical forging of smooth surface to room temperature;
S3, thermal treatment: get the spherical forging obtained in S2, be warming up to 900-950 DEG C, insulation 20-40min, uses water quenching 5-7min, adjusts the temperature to 550-600 DEG C, and insulation 1-2h, is cooled to room temperature and obtains low chromium abrasion-proof steel ball.
2. low chromium abrasion-proof steel ball according to claim 1, it is characterized in that, the diameter of abrasion-proof steel ball is 120-160mm.
3. low chromium abrasion-proof steel ball according to claim 1 or 2, it is characterized in that, the weight percent of its each component is as follows: C:0.75-0.85%; Si:0.35-0.45%; Mn:0.85-0.95%; Cr:0.95-1.05%; Ni:0.075-0.085%; Mo:0.075-0.085%; Al:0.032-0.038%; Cu:0.35-0.45%; B:0.001-0.0015%; V:0.195-0.205%; P:0.01-0.012%; S:0.001-0.0011%; Clout is Fe.
4. low chromium abrasion-proof steel ball according to any one of claim 1-3, it is characterized in that, the weight percent of its each component is as follows: C:0.8%; Si:0.4%; Mn:0.9%; Cr:1%; Ni:0.08%; Mo:0.08%; Al:0.035%; Cu:0.4%; B:0.0013%; V:0.2%; P:0.01%; S:0.001%; Clout is Fe.
5. low chromium abrasion-proof steel ball according to any one of claim 1-4, is characterized in that, in S2, get the hot rolled circular steel obtained in S1, be warming up to 830-870 DEG C, insulation 38-42min, 1030-1070 DEG C is warming up to the speed of 10-30 DEG C/s, insulation 38-42min, cuts into material section, forges 25-30 time, adjust the temperature to 960-980 DEG C, insulation 38-42min, forges 30-40 time, air-cooledly obtains the spherical forging of smooth surface to room temperature.
6. low chromium abrasion-proof steel ball according to any one of claim 1-5, it is characterized in that, in S3, get the spherical forging obtained in S2, add in rotary heating furnace, be warming up to 920-940 DEG C, insulation 25-35min, uses water quenching 5.5-6.5min, adjusts the temperature to 560-580 DEG C, insulation 1.2-1.8h, is cooled to room temperature and obtains low chromium abrasion-proof steel ball.
7. low chromium abrasion-proof steel ball according to any one of claim 1-6, is characterized in that, in S3, the temperature of quenching water is 30-45 DEG C.
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| CN106191697A (en) * | 2016-08-16 | 2016-12-07 | 安徽瑞泰新材料科技有限公司 | A kind of impact-resistant abrasion-proof steel ball and preparation method thereof |
| CN107641774A (en) * | 2017-08-21 | 2018-01-30 | 宁国慧宏耐磨材料有限公司 | A kind of high-chromium rare earth steel ball and preparation method thereof |
| CN109128038A (en) * | 2018-10-23 | 2019-01-04 | 天津威尔朗科技有限公司 | A kind of wear-resisting bar of low alloy high-toughness and its manufacturing process |
| CN110303115A (en) * | 2019-05-27 | 2019-10-08 | 徐州国隆电力配件铸造有限公司 | A kind of casting pattern process for the steel ball that wearability is strong |
| CN111254273A (en) * | 2020-03-06 | 2020-06-09 | 常熟市龙特耐磨球有限公司 | Preparation method of high-carbon wear-resistant steel ball |
| CN113061692A (en) * | 2021-03-22 | 2021-07-02 | 铜陵有色金神耐磨材料有限责任公司 | Normalizing pretreatment process for forged wear-resistant steel balls for mining large-scale semi-autogenous mill |
| CN115976427A (en) * | 2022-12-09 | 2023-04-18 | 铜陵有色金神耐磨材料有限责任公司 | Corrosion-resistant high-wear-resistance large-size forged steel ball for semi-autogenous mill and manufacturing method |
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| CN113061692A (en) * | 2021-03-22 | 2021-07-02 | 铜陵有色金神耐磨材料有限责任公司 | Normalizing pretreatment process for forged wear-resistant steel balls for mining large-scale semi-autogenous mill |
| CN115976427A (en) * | 2022-12-09 | 2023-04-18 | 铜陵有色金神耐磨材料有限责任公司 | Corrosion-resistant high-wear-resistance large-size forged steel ball for semi-autogenous mill and manufacturing method |
| CN115976427B (en) * | 2022-12-09 | 2024-04-12 | 铜陵有色金神耐磨材料有限责任公司 | Corrosion-resistant high-wear-resistant large-size forged steel ball for semi-autogenous mill and manufacturing method |
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