CN104988378A - Mold special for ductile iron grinding balls and manufacturing technology of mold - Google Patents
Mold special for ductile iron grinding balls and manufacturing technology of mold Download PDFInfo
- Publication number
- CN104988378A CN104988378A CN201510323781.2A CN201510323781A CN104988378A CN 104988378 A CN104988378 A CN 104988378A CN 201510323781 A CN201510323781 A CN 201510323781A CN 104988378 A CN104988378 A CN 104988378A
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- China
- Prior art keywords
- ductile iron
- particular manufacturing
- grinding ball
- manufacturing craft
- mold
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- 229910001141 Ductile iron Inorganic materials 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 31
- 238000005516 engineering process Methods 0.000 title claims abstract description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000005498 polishing Methods 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 238000011081 inoculation Methods 0.000 claims description 12
- 238000002844 melting Methods 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000007670 refining Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005266 casting Methods 0.000 abstract description 2
- 229910000805 Pig iron Inorganic materials 0.000 abstract 2
- 238000003723 Smelting Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000005496 tempering Methods 0.000 abstract 1
- 229910001018 Cast iron Inorganic materials 0.000 description 7
- 230000003245 working effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000002929 anti-fatigue Effects 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910001060 Gray iron Inorganic materials 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 238000005279 austempering Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- MHKWSJBPFXBFMX-UHFFFAOYSA-N iron magnesium Chemical compound [Mg].[Fe] MHKWSJBPFXBFMX-UHFFFAOYSA-N 0.000 description 1
- -1 ore Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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- Heat Treatment Of Articles (AREA)
Abstract
The invention relates to the technical field of wear resisting, and provides a mold special for ductile iron grinding balls and a manufacturing technology of the mold. The mold comprises, by weight, 3.6% to 3.9% of C, 2.1% to 2.6% of Si, 0.5% to 0.9% of Mn, not larger than 0.3% of Cr, not larger than 0.05% of S, not larger than 0.05% of P and the balance Fe. The manufacturing technology comprises the steps of smelting, tempering, casting and polishing. Compared with a traditional technology, the material prepared with the manufacturing technology has the comprehensive beneficial effects of high temperature resistance, corrosion resistance, high toughness and fatigue resistance, can completely replace gray pig iron and can be used for the ductile cast iron mold. Although the cost of the mold is slightly higher than that of the gray pig iron, the service life of the mold can be prolonged by four years to five years, the production cost of the ductile iron grinding balls is reduced, and the comprehensive benefits are obvious.
Description
Technical field
The present invention relates to wear-proof technique field, be specifically related to a kind of ductile iron grinding ball particular manufacturing craft and preparation technology thereof.
Background technology
Ball mill is one of widely used Super-fine grinder machinery in industrial production.Abrading-ball is ball mill equipment grinding material medium, produces ablation, thus reduced further by the particle diameter of material by the collision friction between abrading-ball, between abrading-ball and material.Austempering ductile iron abrading-ball (ADI) is the new engineering material that a kind of energy-saving material-saving cost is low, with the abrading-ball that this material is made have that intensity is high, plasticity and toughness good, wear resistance and the high feature of resistance to fatigue, be therefore widely used in the work condition environments such as cement, coal, ore, cinder.
But the abrading-ball made of this material due to molten iron flow performance good, temperature requirement is high, therefore larger to the damage of mould, the material that tradition prepares mould is graphitic cast iron, mould adopts die body and ball bowl to combine, and molten iron contacts with ball bowl, after the time grown, ball bowl is affected by thermal expansion and contraction and occurs distortion, bowl of must more changing the shuttle.General working life is 3-4, and ductile iron grinding ball is larger to the loss of mould, and the mould therefore adopting grey castings material to prepare can not adapt to the use of ductile iron grinding ball.
Summary of the invention
(1) technical problem solved
For the deficiencies in the prior art, the invention provides a kind of ductile iron grinding ball particular manufacturing craft and preparation technology thereof, solve in conventional art that the mould wear resistance adopting gray cast iron material to make is general, intensity and endurance is low, work-ing life is not grown problem.
(2) technical scheme
For realizing above object, the present invention is achieved by the following technical programs:
A kind of ductile iron grinding ball particular manufacturing craft, its chemical composition comprises by weight percentage: C:3.6-3.9%, Si:2.1-2.6%, Mn:0.5-0.9%, Cr :≤0.3%, S :≤0.05%, P :≤0.05%, and remaining is Fe.
Preferably, the chemical composition of described ductile iron grinding ball particular manufacturing craft is by weight percentage: C:3.6%, Si:2.1%, Mn:0.5%, Cr:0.1%, S:0.01%, P:0.01%, and remaining is Fe.
Preferably, the chemical composition of described ductile iron grinding ball particular manufacturing craft is by weight percentage: C:3.7%, Si:2.3%, Mn:0.7%, Cr:0.2%, S:0.02%, P:0.02%, and remaining is Fe.
Preferably, the chemical composition of described ductile iron grinding ball particular manufacturing craft is by weight percentage: C:3.9%, Si:2.6%, Mn:0.9%, Cr:0.23%, S:0.03%, P:0.03%, and remaining is Fe.
A preparation technology for ductile iron grinding ball particular manufacturing craft, comprises the following steps:
Melting: adopt the refining of middle frequency furnace list, to various enter the metering of stove material, first add steel scrap and carburelant, because carburelant add-on is larger, when melting is to half the time in a furnace, carburelant all added, after waiting all material to melt, sampling analysis;
Modified: to come out of the stove and do spheroidization and inoculation process, spheroidization and inoculation is taked to pour method, inoculation divides late inoculation, first time covers on nodulizing agent, adds, be placed on by nodulizing agent bottom molten iron storehouse during second time molten iron discharging with molten iron stream, molten iron can be flushed on nodulizing agent, temperature is 1500 DEG C-1530 DEG C, and the spheroidizing reacion time is: 45-65 second, and the molten iron handled well must be skimmed totally;
Cast: teeming temperature: 1360 DEG C-1480 DEG C, the duration of pouring: must complete in 10 minutes after nodulizing agent reaction terminates;
Polishing: cast bowl foundry goods be cooled to normal temperature after take out, send precision work process after the worn dirt of economy-combat.
Concrete, the chemical composition in the molten iron former state in the preparation technology of described a kind of ductile iron grinding ball particular manufacturing craft after melting step must meet following requirement by weight percentage just can carry out modified step:
C：3.6-3.9％，Si：0.8-1.1％，Mn：0.5-0.8％，Cr：≤0.3％，S：≤0.05％，P：≤0.06％。
(3) beneficial effect
The invention provides a kind of ductile iron grinding ball particular manufacturing craft and preparation technology thereof, relative to conventional art, material prepared by the present invention has high temperature resistant, corrosion-resistant, high tenacity, antifatigue over-all properties, graphitic cast iron can be replaced completely, for Cast Iron Die, although its cost is slightly higher than graphitic cast iron, its work-ing life can improve 4-5, reduce the production cost of spheroidal graphite cast ball, comprehensive benefit is obvious.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, be clearly and completely described to the technical scheme in the embodiment of the present invention below, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
A kind of ductile iron grinding ball particular manufacturing craft, its chemical composition comprises by weight percentage: C:3.6-3.9%, Si:2.1-2.6%, Mn:0.5-0.9%, Cr :≤0.3%, S :≤0.05%, P :≤0.05%, and remaining is Fe.
Embodiment 1:
The chemical composition of described ductile iron grinding ball particular manufacturing craft is by weight percentage: C:3.6%, Si:2.1%, Mn:0.5%, Cr:0.1%, S:0.01%, P:0.01%, and remaining is Fe.
Embodiment 2:
The chemical composition of described ductile iron grinding ball particular manufacturing craft is by weight percentage: C:3.7%, Si:2.3%, Mn:0.7%, Cr:0.2%, S:0.02%, P:0.02%, and remaining is Fe.
Embodiment 3:
The chemical composition of described ductile iron grinding ball particular manufacturing craft is by weight percentage: C:3.9%, Si:2.6%, Mn:0.9%, Cr:0.23%, S:0.03%, P:0.03%, and remaining is Fe.
Based on the preparation technology of above-mentioned a kind of ductile iron grinding ball particular manufacturing craft, comprise the following steps:
Melting: adopt the refining of middle frequency furnace list, to various enter the metering of stove material, first add steel scrap and carburelant, because carburelant add-on is larger, when melting is to half the time in a furnace, carburelant all added, after waiting all material to melt, sampling analysis;
Modified: to come out of the stove and do spheroidization and inoculation process, spheroidization and inoculation is taked to pour method, inoculation divides late inoculation, first time covers on nodulizing agent, adds, be placed on by nodulizing agent bottom molten iron storehouse during second time molten iron discharging with molten iron stream, molten iron can be flushed on nodulizing agent, temperature is 1500 DEG C-1530 DEG C, and the spheroidizing reacion time is: 45-65 second, and the molten iron handled well must be skimmed totally;
Cast: teeming temperature: 1360 DEG C-1480 DEG C, the duration of pouring: must complete in 10 minutes after nodulizing agent reaction terminates;
Polishing: cast bowl foundry goods be cooled to normal temperature after take out, send precision work process after the worn dirt of economy-combat;
Chemical composition in molten iron former state in technique after melting step must meet following requirement by weight percentage just can carry out modified step:
C：3.6-3.9％，Si：0.8-1.1％，Mn：0.5-0.8％，Cr：≤0.3％，S：≤0.05％，P：≤0.06％。
The material more than completed we be referred to as magnesium iron material, this material has high temperature resistant, corrosion-resistant, high tenacity, antifatigue over-all properties, graphitic cast iron can be replaced completely, for Cast Iron Die, although its cost is slightly higher than graphitic cast iron, but its work-ing life can improve 4-5, reduce the production cost of spheroidal graphite cast ball, comprehensive benefit is obvious.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
Above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (6)
1. a ductile iron grinding ball particular manufacturing craft, is characterized in that, its chemical composition comprises by weight percentage: C:3.6-3.9%, Si:2.1-2.6%, Mn:0.5-0.9%, Cr :≤0.3%, S :≤0.05%, P :≤0.05%, and remaining is Fe.
2. ductile iron grinding ball particular manufacturing craft as claimed in claim 1, it is characterized in that, the chemical composition of described ductile iron grinding ball particular manufacturing craft is by weight percentage: C:3.6%, Si:2.1%, Mn:0.5%, Cr:0.1%, S:0.01%, P:0.01%, remaining is Fe.
3. ductile iron grinding ball particular manufacturing craft as claimed in claim 1, it is characterized in that, the chemical composition of described ductile iron grinding ball particular manufacturing craft is by weight percentage: C:3.7%, Si:2.3%, Mn:0.7%, Cr:0.2%, S:0.02%, P:0.02%, remaining is Fe.
4. ductile iron grinding ball particular manufacturing craft as claimed in claim 1, it is characterized in that, the chemical composition of described ductile iron grinding ball particular manufacturing craft is by weight percentage: C:3.9%, Si:2.6%, Mn:0.9%, Cr:0.23%, S:0.03%, P:0.03%, remaining is Fe.
5., according to the preparation technology of the ductile iron grinding ball particular manufacturing craft of claim 1-4 described in one of them, comprise the following steps:
Melting: adopt the refining of middle frequency furnace list, to various enter the metering of stove material, first add steel scrap and carburelant, because carburelant add-on is larger, when melting is to half the time in a furnace, carburelant all added, after waiting all material to melt, sampling analysis;
Modified: to come out of the stove and do spheroidization and inoculation process, spheroidization and inoculation is taked to pour method, inoculation divides late inoculation, first time covers on nodulizing agent, adds, be placed on by nodulizing agent bottom molten iron storehouse during second time molten iron discharging with molten iron stream, molten iron can be flushed on nodulizing agent, temperature is 1500 DEG C-1530 DEG C, and the spheroidizing reacion time is: 45-65 second, and the molten iron handled well must be skimmed totally;
Cast: teeming temperature: 1360 DEG C-1480 DEG C, the duration of pouring: must complete in 10 minutes after nodulizing agent reaction terminates;
Polishing: cast bowl foundry goods be cooled to normal temperature after take out, send precision work process after the worn dirt of economy-combat.
6. the preparation technology of a kind of ductile iron grinding ball particular manufacturing craft as claimed in claim 5, is characterized in that, the chemical composition in the molten iron former state after melting step must meet following requirement by weight percentage just can carry out modified step:
C：3.6-3.9％，Si：0.8-1.1％，Mn：0.5-0.8％，Cr：≤0.3％，S：≤0.05％，P：≤0.06％。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510323781.2A CN104988378A (en) | 2015-06-11 | 2015-06-11 | Mold special for ductile iron grinding balls and manufacturing technology of mold |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510323781.2A CN104988378A (en) | 2015-06-11 | 2015-06-11 | Mold special for ductile iron grinding balls and manufacturing technology of mold |
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| Publication Number | Publication Date |
|---|---|
| CN104988378A true CN104988378A (en) | 2015-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510323781.2A Pending CN104988378A (en) | 2015-06-11 | 2015-06-11 | Mold special for ductile iron grinding balls and manufacturing technology of mold |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105838977A (en) * | 2016-05-26 | 2016-08-10 | 安徽省宁国诚信耐磨材料有限公司 | Nodular cast iron and method for manufacturing hammer and liner plate through nodular cast iron |
| CN106086606A (en) * | 2016-08-05 | 2016-11-09 | 唐山钢铁集团有限责任公司 | A kind of smelting process of spheroidal graphite roll |
| CN107245639A (en) * | 2017-06-12 | 2017-10-13 | 赵昆山 | A kind of bolt and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1045279A (en) * | 1989-03-02 | 1990-09-12 | 航空航天部远东机械制造公司 | A kind of high strength easy cutting cast iron |
| CN102337449A (en) * | 2010-07-21 | 2012-02-01 | 周传禄 | GRTCr high-toughness high-heat conduction cooling wall and production method thereof |
| CN103098148A (en) * | 2010-09-02 | 2013-05-08 | 瑟迪崴(有限公司)玻璃与混合柱型隔离器欧洲公司 | Process for manufacturing a casting made of ductile cast iron for a high-voltage insulator fitting |
| CN104152787A (en) * | 2014-07-25 | 2014-11-19 | 安徽省宁国诚信耐磨材料有限公司 | Nodular cast ball and manufacturing method thereof |
| CN104233048A (en) * | 2014-09-22 | 2014-12-24 | 青阳县天平机械制造有限公司 | Cast state high-strength and high-toughness ball iron alloy for steering axle and preparation method of cast state high-strength and high-toughness ball iron alloy |
-
2015
- 2015-06-11 CN CN201510323781.2A patent/CN104988378A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1045279A (en) * | 1989-03-02 | 1990-09-12 | 航空航天部远东机械制造公司 | A kind of high strength easy cutting cast iron |
| CN102337449A (en) * | 2010-07-21 | 2012-02-01 | 周传禄 | GRTCr high-toughness high-heat conduction cooling wall and production method thereof |
| CN103098148A (en) * | 2010-09-02 | 2013-05-08 | 瑟迪崴(有限公司)玻璃与混合柱型隔离器欧洲公司 | Process for manufacturing a casting made of ductile cast iron for a high-voltage insulator fitting |
| CN104152787A (en) * | 2014-07-25 | 2014-11-19 | 安徽省宁国诚信耐磨材料有限公司 | Nodular cast ball and manufacturing method thereof |
| CN104233048A (en) * | 2014-09-22 | 2014-12-24 | 青阳县天平机械制造有限公司 | Cast state high-strength and high-toughness ball iron alloy for steering axle and preparation method of cast state high-strength and high-toughness ball iron alloy |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105838977A (en) * | 2016-05-26 | 2016-08-10 | 安徽省宁国诚信耐磨材料有限公司 | Nodular cast iron and method for manufacturing hammer and liner plate through nodular cast iron |
| CN106086606A (en) * | 2016-08-05 | 2016-11-09 | 唐山钢铁集团有限责任公司 | A kind of smelting process of spheroidal graphite roll |
| CN107245639A (en) * | 2017-06-12 | 2017-10-13 | 赵昆山 | A kind of bolt and preparation method thereof |
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Application publication date: 20151021 |
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