CN1035520C - Low alloy white cast iron foundery grinding ball for nodular iron ore powder - Google Patents
Low alloy white cast iron foundery grinding ball for nodular iron ore powder Download PDFInfo
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- CN1035520C CN1035520C CN93119012A CN93119012A CN1035520C CN 1035520 C CN1035520 C CN 1035520C CN 93119012 A CN93119012 A CN 93119012A CN 93119012 A CN93119012 A CN 93119012A CN 1035520 C CN1035520 C CN 1035520C
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Abstract
The present invention relates to a low-alloy white-iron cast grinding ball suitable for ball-grinding iron ore powder. A pig iron furnace material and a steel furnace material are used as the base materials, and a four-element composite modifying agent containing aluminum, vanadium, titanium and rare earth is added so as to make the low-alloy white-iron cast grinding ball without adding copper. The present invention has the advantages of favorable abrasion resistance and favorable shock resistance and can be used for small ball grinders in the cast condition; the toughness of the low-alloy white-iron cast grinding ball is enhanced after the heat treatment; the present invention can be used for medium-sized and large-sized ball grinders; the present invention is especially suitable for ball-grinding iron ore powder owing to the low content of gold and copper.
Description
The present invention relates to a kind of alloy, exactly is a kind of low-alloy white pig iron cast grinding ball that is suitable for the ball milling powdered iron ore.
The abrading-ball that ball mill is used not only requires the hardness height but also requires good toughness, makes it that for a long time abrasion loss is little under the working condition of certain temperature and frequent bump, breakage rate is low.But in fact, the material that hardness is high is crisp, and cracky is not shock-resistant, and the material of good toughness is easy to wear, and is not wear-resisting.As the steel abrading-ball that generally uses for a long time with the medium manganese nodular cast iron abrading-ball is easy to wear, unit consumption is high.Exploitation in recent years with chromium, molybdenum, copper, or the low-alloy white pig iron cast grinding ball of chromium, copper alloying only is suitable for using on the small grinder of φ below 2.2 meters.
Copper is confirmed to be harmful element at smelting iron and steel, when especially smelting the high-quality steel, thus national Specification its allow to remain in 0.20～0.30%.Because the characteristic of copper can not be removed in smelting, so the contained copper of powdered iron ore itself will all remain in the iron and steel, copper content is low more good more in the powdered iron ore, if also contain copper in the abrading-ball, also will enter after the experience wear in the powdered iron ore, and this is disadvantageous to steel.So the cupric abrading-ball should not be used for the ball milling powdered iron ore.Above-mentioned low-alloy white cast-iron grinding ball cupric 0.6～2.0% (weight meter, down together).Respectively cupric below 0.6%, 1.5--2.5%, 0.5--3.0% in CN87104407A, CN1032678A, 88107653.8, CN1042729A, the 89105124.4 disclosed grinding ball materials, when copper content in the material surpasses 0.3%, in smelting process, must add from outside.
The object of the present invention is to provide a kind of when smelting, do not add copper and hardness better, the cast grinding ball of good-toughness, its is fit to ball milling powdered iron ore, also is fit to ball milling of cement and other materials.
It is base-material that the present invention adopts pig iron matter and steel furnace charge, without copper alloying, with aluminium (AL), vanadium (V), titanium (Ti), rare earth (Re) quaternary composite inoculating (being modification) and get concrete chemical ingredients following (weight %): C:1.80～3.30; Si:0.40～1.50; Mn:0.60～1.40; Cr:1.00～3.80; Al:0.08～0.20 (in add-on); V:0.05～0.20; Ti:0.04～0.15; RE:0.03～0.10; P≤0.10, S≤0.10, all the other are Fe.Residual Mo :≤0.08; Residual Cu :≤0.3; More than the limited range of each element can determine corresponding optimum content according to different working conditions.
C: carbon content and macrohardness are linear, but carbide hard and crisp, and be wear-resisting and not shock resistance has enough toughness again for making abrading-ball have better wear resistance, is limited in 1.8～3.30 scopes.
Si: silicon can reduce hardening capacity and promote greying.Its content height is with coarsened grain, reduction toughness.Contain the silicon of some amount in the pig iron matter furnace charge, but be defined as 0.40～1.50.
Mn: Jie's quenching velocity is faced in the manganese reduction, improves hardening capacity, promotes to obtain martensitic stucture, increases carbide quantity, the refine pearlite tissue helps improving hardness, but the content height, increase austenite content, unfavorable to improving wear resistance, so be defined as 0.60～1.40.
Cr: chromium is with the same hardness of alloy that improves of manganese.In addition, chromium also can improve the wear-corrosion resistance of alloy, makes to waste ball and increase the service life under the wet-milling working condition; Improve anti-temper resistance, make abrading-ball be adapted at the working condition work down of certain temperature.But too high levels then surpasses low-alloyed scope.
Al, V, Ti, RE: trace, but effective alterant, but their crystal grain thinnings, fixed nitrogen and oxygen, thereby can reduce susceptibility to breach improve toughness, especially rare earth, refined cast structure strongly, thereby raising shock resistance.
Mo: not adding molybdenum among the present invention, is that molybdenum residual in the iron and steel furnace charge is transferred among the alloy, and it is not oxidized in smelting process, can not remove.But molybdenum is a beneficial element, is limited to below 0.08.
Cu: copper is non-alloy element among the present invention, does not add, and is that copper residual in the furnace charge is transferred among the alloy, is limited in the high-quality steel of GB regulation below the copper content standard, promptly below 0.3.
P, S: p and s is the detrimental impurity element, and is low more good more, generally is controlled at below 0.01.
The present invention makes abrading-ball just have higher impelling strength in as cast condition owing to use AL, V, Ti, RE composite inoculating, also can further improve after the thermal treatment, in addition to hardness (HRC) and non-notch toughness (α
K) two indexs can select HRC42～45, as cast condition α K4.5J/cm in following scope
2More than; HRC48～52, as cast condition α K3.0J/cm
2More than; Under certain turning condition, the curling steely car bits of car bits.Higher impact resistance makes abrading-ball can satisfy φ medium-sized ball mill service requirements more than 2.7 meters.The present invention especially is fit to the ball milling powdered iron ore.The present invention is on probation in certain large-scale iron ore, and 78 tons of abrading-balls (S φ 60mm, HRC49～53, as cast condition α K 〉=3.0J/cm are provided
2With carbide cutter tool turning abrading-ball, lathe rotating speed 370rpm, the depth of cut 2～3mm, feed 0.1～0.3mm, the car bits curl as steel car bits), ball milling magnetic iron ore in φ 3.2 * 3.1m wet type grate discharge ball mill, (Polodyakonov coefficient f=18～20, be the hardest a kind of), add up to operation 520 hours, 34827 tons in ball milling raw ore.0.359 kilogram of/ton ore deposit of abrading-ball consumption, for medium carbon steel forged steel abrading-ball 1/2nd a little less than, percentage of damage is 0.13%, is minimum in the ad eundem abrading-ball.
The present invention smelts the back metal type cast with the method for conventional alloy smelting steel and becomes abrading-ball, and as cast condition is used for small grinder, uses for medium-sized ball mill after the thermal treatment.Pig iron matter furnace charge and steel furnace charge can use cupola furnace, electric arc furnace or induction furnace to smelt, and smelt for good with cupola furnace-electric arc furnace, cupola furnace-induction furnace duplex.
Embodiment
Adopt 250 kilograms of medium-frequency induction furnaces to smelt the abrading-ball that the back metal type cast becomes 60 millimeters of φ, chemical ingredients and physicals are as follows: C 2.44, and Si 1.40, Mn 0.95, and Cr 1.18, Al (in add-on) 0.10, V 0.11, and Ti 0.06, and Re 0.035, residual Mo≤0.08, residual Cu 0.18, P 0.09, and S 0.08, HRC44～45, α K7.8.
Claims (1)
1, a kind of low-alloy white pig iron cast grinding ball that is suitable for the ball milling powdered iron ore is characterized in that
Chemical ingredients (weight %): C:1.80～3.30, Si:0.40～1.50, Mn:0.60～1.40, Cr:1.00～3.80, Al:0.08～0.20, V:0.05～0.20, Ti:0.0 4～0.15, RE:0.03～0.10, P≤0.10, S≤0.10, the Fe surplus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93119012A CN1035520C (en) | 1993-10-14 | 1993-10-14 | Low alloy white cast iron foundery grinding ball for nodular iron ore powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93119012A CN1035520C (en) | 1993-10-14 | 1993-10-14 | Low alloy white cast iron foundery grinding ball for nodular iron ore powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1101682A CN1101682A (en) | 1995-04-19 |
| CN1035520C true CN1035520C (en) | 1997-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93119012A Expired - Fee Related CN1035520C (en) | 1993-10-14 | 1993-10-14 | Low alloy white cast iron foundery grinding ball for nodular iron ore powder |
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| Country | Link |
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| CN (1) | CN1035520C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100465318C (en) * | 2005-06-10 | 2009-03-04 | 上海上大热欣科技发展有限公司 | CrMoCu alloy cast iron continuous casting section bar and manufacturing method thereof |
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| CN101580914B (en) * | 2009-05-07 | 2010-12-29 | 山东建筑大学 | Mn series non-magnetic ductile cast iron material |
| CN101864533B (en) * | 2010-05-14 | 2012-11-07 | 宁国市南洋铁球有限公司 | Grinding ball specialized for mine |
| CN101886229B (en) * | 2010-06-30 | 2013-01-02 | 安徽省三方耐磨股份有限公司 | Ball dedicated for semi-autogenous mill and process method thereof |
| CN103447123A (en) * | 2012-05-28 | 2013-12-18 | 汪福海 | Grinding ball special for wet mill |
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| CN104233115A (en) * | 2014-08-25 | 2014-12-24 | 章学良 | Chromium-manganese abrasion-resistant alloy, chromium-manganese alloy grinding ball and preparation method of alloy |
| CN105420618A (en) * | 2015-12-08 | 2016-03-23 | 安徽创新电磁离合器有限公司 | Brake metal sheet and preparation method thereof |
| CN105506488A (en) * | 2015-12-08 | 2016-04-20 | 安徽创新电磁离合器有限公司 | Abrasion-proof sheet metal and preparation method thereof |
| CN105543635A (en) * | 2015-12-30 | 2016-05-04 | 宁国市海兴耐磨材料有限公司 | Wear resistant ball with higher toughness and hardness |
| CN105821329A (en) * | 2016-04-28 | 2016-08-03 | 宁国市开源电力耐磨材料有限公司 | High-strength and low-chromium forge material and preparing method thereof |
| CN108588547A (en) * | 2018-07-13 | 2018-09-28 | 宁国市正兴耐磨材料有限公司 | A kind of multicomponent alloy high-toughness wear-resistant ball and its manufacturing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037548A (en) * | 1989-01-09 | 1989-11-29 | 东北工学院科学技术服务公司 | Low-cr, b multi-element alloy anti-wear cast iron |
| CN1048729A (en) * | 1989-07-08 | 1991-01-23 | 许广礼 | Mo-series low-alloy cast iron |
| CN1054801A (en) * | 1991-04-01 | 1991-09-25 | 河北工学院 | High-strength low-alloy white cast-iron grinding ball and manufacture method thereof |
-
1993
- 1993-10-14 CN CN93119012A patent/CN1035520C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037548A (en) * | 1989-01-09 | 1989-11-29 | 东北工学院科学技术服务公司 | Low-cr, b multi-element alloy anti-wear cast iron |
| CN1048729A (en) * | 1989-07-08 | 1991-01-23 | 许广礼 | Mo-series low-alloy cast iron |
| CN1054801A (en) * | 1991-04-01 | 1991-09-25 | 河北工学院 | High-strength low-alloy white cast-iron grinding ball and manufacture method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100465318C (en) * | 2005-06-10 | 2009-03-04 | 上海上大热欣科技发展有限公司 | CrMoCu alloy cast iron continuous casting section bar and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1101682A (en) | 1995-04-19 |
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