CN101956123A - Production method of high-abrasion-resistance antifatigue vermicular cast iron - Google Patents
Production method of high-abrasion-resistance antifatigue vermicular cast iron Download PDFInfo
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- CN101956123A CN101956123A CN 201010294492 CN201010294492A CN101956123A CN 101956123 A CN101956123 A CN 101956123A CN 201010294492 CN201010294492 CN 201010294492 CN 201010294492 A CN201010294492 A CN 201010294492A CN 101956123 A CN101956123 A CN 101956123A
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Abstract
The invention relates to a production method of high-abrasion-resistance antifatigue vermicular cast iron, which is characterized by comprising the following steps of: (1) raw material selection: melting conventional common scrap iron into molten iron; (2) molten iron pretreatment; and (3) vermicularizing treatment. In the invention, the vermicularized vermicular cast iron comprises the following components in percentage by weight: 1.4-4.2 percent of C, 1.4-2.4 percent of Si, 0.4-0.8 percent of Mn, less than 0.09 percent of P and less than 0.03 percent of S and has tensile strength of 340Rm(min)/MPa, yield strength of 270RpO2(min)/MPa, elongation percentage of 1.00A(min)/percent and hardness of 170-249HBW, and the vermicularity exceeds 80 percent.
Description
Technical field
The present invention relates to the manufacture field of cast iron, especially about a kind of production method of high abrasion antifatigue vermicular cast iron.
Background technology
Vermicular cast iron itself has higher mechanical property and good thermal conductivity, therefore, it has unique purposes, particularly have higher use properties, heat-resistant anti-fatigue performance, wear resisting property, damping performance and thermal shock resistance, and vermicular cast iron shows than graphitic cast iron and the better comprehensive heat-resistant anti-fatigue performance of magnesium iron, so all use in large-scale popularization both at home and abroad at present, China starts late, mainly be to be familiar with deficiency and certain degree of difficulty is arranged on operational applications.Vermicular cast iron has all been obtained good effect in the application of aspects such as the motor car engine of automobile, vapor pipe, large combustion machine cylinder cap, ingot mold, glass mold, diesel engine cylinder cover, braking component.At present, there is following shortcoming in the technology of domestic preparation base iron: energy consumption is big, and seriously polluted; Molten steel quality is poor, and nodulizing rate is low; The consumption of metallic element scaling loss is big, the scrap rate height.
Summary of the invention
At above deficiency, the object of the present invention is to provide a kind of production method of high abrasion antifatigue vermicular cast iron, be in the processing of iron liquid, to add vermiculizer, produce nodulizing rate and surpass 80% vermicular cast iron.The vermiculizer composition is: Mg5 ± 1%; (Re+Ce) 14 ± 1%; Ca5 ± 1%; Si46 ± 2%; All the other are Fe.Vermicular cast iron composition after wriggling processing is: C 1.4-4.2%; Si 1.4-2.4%; Mn 0.4-0.8%; P＜0.09%; S＜0.03%, tensile strength 340Rm(min)/MPa, yield strength 270RpO2(min)/MPa, elongation 1.00A(min)/%, hardness 170-249 HBW, nodulizing rate surpasses 80%.
Technical scheme of the present invention realizes in the following manner: the production method of high abrasion antifatigue vermicular cast iron by weight percentage, may further comprise the steps:
1) material choice: the common scrap iron with routine is molten into iron liquid, and iron liquid composition is: C 2.7-4.6%; Si 1.8-3.2%; Mn 1.0-1.4%; P0.07-0.11%; S0.055-0.09%; All the other are iron;
2) pre-treatment of iron liquid: mechanical mixing method, CaC with 0.5% ~ 0.7%
2Be applied to the head of a hollow T-shape fire resisting material tube and fire resisting material tube is inserted in the iron liquid, making its rotating speed is 70 rad/min, times 4 min, w(S) amount can take off to 0.005% from 0.070%;
3) wriggling processing: with add-on is that 1.1% vermiculizer of iron liquid directly places in the reaction chamber, and when iron liquid was flowed through reaction chamber, vermiculizer melted rapidly, utilized stirring of iron liquid to finish stirring when tapping a blast furnace, and wriggling processing is promptly finished in iron liquid and vermiculizer reaction;
Described vermiculizer composition: Mg5 ± 1%; (Re+Ce) 14 ± 1%; Ca5 ± 1%; Si46 ± 2%; All the other are Fe.
The treatment temp of described wriggling processing is 1420 ℃-1440 ℃; Be 14-16 minute the duration of pouring.
The present invention, through the vermicular cast iron of wriggling processing, its composition: C 1.4-4.2%; Si 1.4-2.4%; Mn 0.4-0.8%; P＜0.09%; S＜0.03%, tensile strength 340Rm(min)/MPa, yield strength 270RpO2(min)/MPa, elongation 1.00A(min)/%, hardness 170-249 HBW, nodulizing rate surpasses 80%.
Embodiment
The production method of high abrasion antifatigue vermicular cast iron by weight percentage, may further comprise the steps:
1, material choice: the common scrap iron with routine is molten into iron liquid, and iron liquid composition is: C 2.7-4.6%; Si 1.8-3.2%; Mn 1.0-1.4%; P0.07-0.11%; S0.055-0.09%; All the other are iron and some interference elements.Be good preferably with the low scrap iron of sulphur content.Raw material in 1490-1520 ℃ of melting, is obtained molten iron;
2, the pre-treatment of iron liquid: mechanical mixing method, CaC with 0.5% ~ 0.7%
2Be applied to the head of a hollow T-shape fire resisting material tube and be inserted in the iron liquid, make its rotation, utilize siphon principle that iron liquid is constantly sucked from the bottom, discharge, make iron liquid and CaC from T-shape fire resisting material tube both upper ends thereof with motor
2Fully contact reaches the desulfurization purpose.T-shape fire resisting material tube rotating speed is in 70 rad/min, times 4 min, makes w(S) measure and take off to below 0.005% from 0.070%;
3, wriggling processing: with add-on is that 1.1% vermiculizer of iron liquid directly places in the reaction chamber, and when iron liquid was flowed through reaction chamber, vermiculizer melted rapidly, utilized stirring of iron liquid to finish stirring when tapping a blast furnace, and wriggling processing is promptly finished in iron liquid and vermiculizer reaction; Vermiculizer composition: Mg5 ± 1%; (Re+Ce) 14 ± 1%; Ca5 ± 1%; Si46 ± 2%; All the other are Fe, can form carbide in the treating processes, and serious time marquis forms cementite network.Quench, after the tempering then 1420 ℃-1440 ℃ at the crystal boundary place; Be 14-16 minute the duration of pouring.After flowing through reaction chamber and vermiculizer reaction, iron liquid can finish wriggling processing.
Handle back vermicular cast iron composition: S content in base iron is 0.055-0.09%, handles back＜0.03%.Mechanical property reaches GB.
W(Mn in the vermicular cast iron) Liang selection:
When the ferrite of producing high elongation rate was wriggled iron, w(Mn) amount should be less than 0.4%.In vermicular cast iron, generate stable compound because of the existence of Mg and RE and with S, O, this moment, Mn mainly played alloying and stable cementite and pearlitic effect.Suitably improve w(Mn) measure and can improve intensity, hardness, reduce toughness and plasticity.W(Mn) the excessive mechanical property that then worsens cast iron increases the shrinkage porosite tendency, and improves brittle transition temperature.In thick and large casting, Mn is easily in the enrichment of eutectic cell border, segregation, and forming perlite has black reticulattion, occurs the austenitic area of white after the isothermal quenching, and this segregation product also is difficult to eliminate with high temperature annealing for a long time.Therefore Mn should give necessary restriction.
Claims (3)
1. the production method of high abrasion antifatigue vermicular cast iron by weight percentage, is characterized in that: may further comprise the steps:
1), material choice: the common scrap iron with routine is molten into iron liquid, and iron liquid composition is: C 2.7-4.6%; Si 1.8-3.2%; Mn 1.0-1.4%; P0.07-0.11%; S0.055-0.09%; All the other are iron;
2), the pre-treatment of iron liquid: mechanical mixing method, CaC with 0.5% ~ 0.7%
2Be applied to the head of a hollow T-shape fire resisting material tube and fire resisting material tube is inserted in the iron liquid, making its rotating speed is that 70 rad/min, time are 4 min;
3) wriggling processing: with add-on is that 1.1% vermiculizer of iron liquid directly places in the reaction chamber, and when iron liquid was flowed through reaction chamber, vermiculizer melted rapidly, utilized stirring of iron liquid to finish stirring when tapping a blast furnace, and wriggling processing is promptly finished in iron liquid and vermiculizer reaction.
2. the production method of high abrasion antifatigue vermicular cast iron according to claim 1 is characterized in that: the vermiculizer composition in the described step 3) really: Mg 5 ± 1%; (Re+Ce) 14 ± 1%; Ca 5 ± 1%; Si 46 ± 2%; All the other are Fe.
3. the production method of high abrasion antifatigue vermicular cast iron according to claim 1 is characterized in that: the treatment temp of wriggling processing is 1420 ℃-1440 ℃ in the described step 3); Be 14-16 minute the duration of pouring.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787198A (en) * | 2012-08-29 | 2012-11-21 | 福建省建阳市杜氏铸造有限公司 | Vermicular cast iron and manufacturing method of vermicular cast iron |
| CN102796939A (en) * | 2012-08-29 | 2012-11-28 | 丹阳市锦雄机械制造有限公司 | Method for vermicular cast iron by using mixed vermiculizer |
| CN102808060A (en) * | 2012-08-29 | 2012-12-05 | 福建省建阳市杜氏铸造有限公司 | Vermicular agent and preparation method thereof |
| CN105401066A (en) * | 2015-11-26 | 2016-03-16 | 成都九十度工业产品设计有限公司 | Low-tin-silicon-molybdenum vermicular graphite cast iron and preparation method thereof |
| CN105568123A (en) * | 2015-12-21 | 2016-05-11 | 青特集团有限公司 | Manufacturing method of vermicular graphite cast-iron brake drum |
| CN106191366A (en) * | 2016-09-13 | 2016-12-07 | 哈尔滨理工大学 | A kind of vermiculizer preparing vermicular cast iron and preparation method thereof |
| CN107447158A (en) * | 2017-07-17 | 2017-12-08 | 常熟市精工模具制造有限公司 | The preparation method of high alloy black vermicular cast iron glass mold material |
| WO2018058228A1 (en) * | 2016-09-29 | 2018-04-05 | Tupy S.A. | Vermicular cast iron alloy for internal combustion engine block and head |
| CN107893189A (en) * | 2017-10-13 | 2018-04-10 | 滨州渤海活塞有限公司 | High magnesium low rare earth austenite vermicular cast iron, its preparation method and its application |
| CN109468526A (en) * | 2018-12-14 | 2019-03-15 | 苏州东海玻璃模具有限公司 | Vermicular cast iron glass mold material and mould preparation method |
| CN111139397A (en) * | 2019-12-23 | 2020-05-12 | 山东时风（集团）有限责任公司 | Rapid preparation method of vermicular cast iron truck brake disc |
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2010
- 2010-09-28 CN CN 201010294492 patent/CN101956123A/en active Pending
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| 《实用铸铁技术》 20081031 胡家骢 实用铸铁技术 辽宁科学技术出版社 402-403 1-3 , 1 * |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787198A (en) * | 2012-08-29 | 2012-11-21 | 福建省建阳市杜氏铸造有限公司 | Vermicular cast iron and manufacturing method of vermicular cast iron |
| CN102796939A (en) * | 2012-08-29 | 2012-11-28 | 丹阳市锦雄机械制造有限公司 | Method for vermicular cast iron by using mixed vermiculizer |
| CN102808060A (en) * | 2012-08-29 | 2012-12-05 | 福建省建阳市杜氏铸造有限公司 | Vermicular agent and preparation method thereof |
| CN102808060B (en) * | 2012-08-29 | 2014-03-12 | 福建省建阳市杜氏铸造有限公司 | Vermicular agent and preparation method thereof |
| CN105401066A (en) * | 2015-11-26 | 2016-03-16 | 成都九十度工业产品设计有限公司 | Low-tin-silicon-molybdenum vermicular graphite cast iron and preparation method thereof |
| CN105568123A (en) * | 2015-12-21 | 2016-05-11 | 青特集团有限公司 | Manufacturing method of vermicular graphite cast-iron brake drum |
| CN106191366A (en) * | 2016-09-13 | 2016-12-07 | 哈尔滨理工大学 | A kind of vermiculizer preparing vermicular cast iron and preparation method thereof |
| WO2018058228A1 (en) * | 2016-09-29 | 2018-04-05 | Tupy S.A. | Vermicular cast iron alloy for internal combustion engine block and head |
| CN109923232A (en) * | 2016-09-29 | 2019-06-21 | 图彼股份公司 | Helminth graphite cast iron alloy for IC engine airframe and cylinder head |
| EP3519602A4 (en) * | 2016-09-29 | 2020-04-01 | Tupy S.A. | Vermicular cast iron alloy for internal combustion engine block and head |
| US11434552B2 (en) | 2016-09-29 | 2022-09-06 | Tupy S.A. | Vermicular cast iron alloy for internal combustion engine block and head |
| CN107447158A (en) * | 2017-07-17 | 2017-12-08 | 常熟市精工模具制造有限公司 | The preparation method of high alloy black vermicular cast iron glass mold material |
| CN107893189A (en) * | 2017-10-13 | 2018-04-10 | 滨州渤海活塞有限公司 | High magnesium low rare earth austenite vermicular cast iron, its preparation method and its application |
| CN107893189B (en) * | 2017-10-13 | 2019-09-20 | 滨州渤海活塞有限公司 | The low rare earth austenite vermicular cast iron of high magnesium, preparation method and its application |
| CN109468526A (en) * | 2018-12-14 | 2019-03-15 | 苏州东海玻璃模具有限公司 | Vermicular cast iron glass mold material and mould preparation method |
| CN111139397A (en) * | 2019-12-23 | 2020-05-12 | 山东时风（集团）有限责任公司 | Rapid preparation method of vermicular cast iron truck brake disc |
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Open date: 20110126 |