CN103451393A - Heat treatment process of austempered ductile iron grinding balls - Google Patents
Heat treatment process of austempered ductile iron grinding balls Download PDFInfo
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- CN103451393A CN103451393A CN2013103603330A CN201310360333A CN103451393A CN 103451393 A CN103451393 A CN 103451393A CN 2013103603330 A CN2013103603330 A CN 2013103603330A CN 201310360333 A CN201310360333 A CN 201310360333A CN 103451393 A CN103451393 A CN 103451393A
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- iron grinding
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- grinding balls
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- 238000000227 grinding Methods 0.000 title claims abstract description 40
- 229910001141 Ductile iron Inorganic materials 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000010438 heat treatment Methods 0.000 title claims abstract description 14
- 238000010791 quenching Methods 0.000 claims abstract description 39
- 230000000171 quenching effect Effects 0.000 claims abstract description 35
- 229910001018 Cast iron Inorganic materials 0.000 claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 238000005496 tempering Methods 0.000 claims abstract description 16
- 238000005266 casting Methods 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 64
- 229910052742 iron Inorganic materials 0.000 claims description 32
- 238000005516 engineering process Methods 0.000 claims description 10
- 150000003839 salts Chemical class 0.000 abstract description 9
- 239000003921 oil Substances 0.000 description 13
- 229910052804 chromium Inorganic materials 0.000 description 9
- 239000011651 chromium Substances 0.000 description 9
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 235000019353 potassium silicate Nutrition 0.000 description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 4
- 238000005279 austempering Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 235000015170 shellfish Nutrition 0.000 description 3
- 238000007669 thermal treatment Methods 0.000 description 3
- 238000001238 wet grinding Methods 0.000 description 3
- 229910000604 Ferrochrome Inorganic materials 0.000 description 2
- 229910001037 White iron Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910001563 bainite Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000007531 graphite casting Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 229940001516 sodium nitrate Drugs 0.000 description 1
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Abstract
The invention relates to a heat treatment process of austempered ductile iron grinding balls. For quenching treatment on the austempered ductile iron grinding balls, the heat treatment process comprises the following steps: immediately immersing cast iron grinding balls coming out of a casting production line into isothermal quenching oil and controlling the temperature of the isothermal quenching oil in the range from 70 DEG C to 110 DEG C; and staying in the quenching oil for 3-12 minutes, wherein the surface temperature of the cast iron grinding balls out of oil after isothermal quenching ranges from 200 DEG C to 270 DEG C. For tempering treatment on the austempered ductile iron grinding balls, the heat treatment process comprises the following steps: immediately delivering the cast iron grinding balls out of oil into a tempering furnace, and controlling the temperature of isothermal tempering in the range from 260 DEG C to 320 DEG C and the time of isothermal tempering in the range from 220 minutes to 320 minutes, thereby obtaining the austempered ductile iron grinding balls. The isothermal quenching oil is used as a quenching medium instead of a salt bath, and therefore, salt bath pollution is avoided; the production cost is low, and the obtained austempered ductile iron grinding balls are good in hardness which ranges from 50 HRC to 58 HRC.
Description
Technical field
The present invention relates to iron body ductile iron grinding ball heat-treatment technology method difficult to understand.
Background technology
All claim shellfish body spheroidal graphite cast iron difficult to understand or bainite ductile iron before domestic, the title argue, according to the definition of GB/T24733-2009: " a kind ofly by spheroidal graphite cast iron, by isothermal quenching thermal treatment, obtain take the casting alloy that intensity is high, plasticity is good that iron body difficult to understand (ausferrite) is main matrix.Austempering ductile iron (austempered ductile iron), also referred to as iron body spheroidal graphite cast iron difficult to understand, is referred to as again to call ADI.”
Because iron body spheroidal graphite cast iron difficult to understand (ADI) has the over-all propertieies such as high strength, high tenacity, wear-resisting, antifatigue, in the national economy every field, as aspects such as automobile, engine, agricultural machinery, engineering machinery, shipbuilding, railway, metallurgy, mine, electric power (comprising wind-powered electricity generation), weapons, all be widely used.
Aspect high-abrasive material, application also obtains positive effect, and the abrasion of iron body ductile iron grinding ball difficult to understand in the wet grinding mill of mine reach the level of high chromium ball, than the low chromium ball abrasion, reduces 40-50%.Iron body ductile iron grinding ball difficult to understand is the product that substitutes the update of low chromium cast ball in the wet grinding mill of mine.If national mine all adopts iron body ductile iron grinding ball difficult to understand, national mine abrading-ball total flow can reduce ten thousand tons of 50-60, and this is the vital measure of national energy-saving, reduction of discharging, decrement.
This material is because the material that uses is all to take silicon, manganese as main, and this is the alloy material of China's affluence, does not need to add rare Chrome metal powder, and production cost is relatively low, and cost performance is moderate, be to be applicable to China's national situation, a kind of wear-resistant material that have potential market.
China successively develops iron body ductile iron grinding ball material difficult to understand in the eighties, and demonstrates superior performance under the wet-milling working condition, and matrix obtains and take bainite as main matrix through quench (or isothermal quenching).Although its hardness ratio high-chromium white cast iron class is slightly poor, but toughness is better than high-chromium white cast iron, and cost performance is better than the rich chromium cast iron material, particularly rich chromium cast iron will adopt a large amount of ferrochrome, and chromium is the goods and materials that China needs a large amount of imports, and a large amount of ferrochrome to be used on abrading-ball be not recyclable and regeneration, so in the grinding of mine, adopt the high chromium casting ball not meet China's national situation.
Because also there are some difficult problems in cast iron casting ball difficult to understand technology controlling and process in a large amount of production processes, the Wu Dehai of Tsing-Hua University professor develops shellfish body spheroidal graphite casting abrading-ball difficult to understand at the beginning of the eighties, there is no up to now the large-scale popularization application, only have minority factory producing and application. main difficult technical is:
The firstth, the molten iron pouring time that nodularization is good generally is no more than 12 minutes, and the time has been grown and will produce nodularization and gather and move back, and the nodularization rate descends, and it is more difficult in production, to control;
The secondth, equipment, the heat-eliminating medium of isothermal quenching or continuous quenching are not resolved, and can only adopt the car type furnace heating eighties, are interrupted and produce, and can not realize that the automatization of heat place quenching+tempering operation is controlled.Quenchant can only adopt water glass at that time, and the water glass kind is also a lot, and modulus and concentration are different, and the cooling performance difference is very large, in actual production, was difficult to grasp; The more important thing is that water glass is too fast 400 ℃ of following speed of cooling, and iron body spheroidal graphite cast iron difficult to understand is wished in slow cooling below 400 ℃, obtain lower shellfish body, therefore adopt water glass to cause iron weight difficult to understand unstable as quenchant, Fragmentation Phenomena happens occasionally, and this is also that iron body cast ball difficult to understand does not have a large amount of major causes of producing and using so for many years.
The iron body difficult to understand of domestic production at present nodular iron casting thermal treatment great majority are to adopt salt bath austempering, but salt bath austempering comparison in equipment complexity, and the salt steam that SODIUMNITRATE, saltpetre are distributed when high temperature has strong corrodibility, environment is caused to adverse influence, quenching workpiece also needs water to rinse, therefore also be equipped with water treating equipment, equipment purchasing expense and production cost are high, and adopting this technology and equipment for low value-added abrading-ball is not have competitive power.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of iron body ductile iron grinding ball heat-treatment technology method difficult to understand, and the iron weight difficult to understand that overcomes the prior art existence is unstable, the quenching apparatus complexity, and production cost is high, environment is had to the defect of adverse influence.
For solving the problems of the technologies described above, the invention provides a kind of iron body ductile iron grinding ball heat-treatment technology method difficult to understand, it is characterized in that, described iron body ductile iron grinding ball difficult to understand is carried out to quench treatment, comprise with step:
Will be from casting production line cast-iron grinding ball out immerse immediately in isothermal quenching oil, the oil temperature of isothermal quenching oil is controlled at 70-110 ℃; Time in quenching oil is 3-12 minute; Going out oil surface temperature after described cast-iron grinding ball isothermal quenching is 200-270 ℃.
Further, described iron body ductile iron grinding ball difficult to understand is carried out to temper, comprises with step:
After described cast-iron grinding ball quenching is fuel-displaced, send into immediately in tempering stove, the isothermal tempering temperature is controlled at 260-320 ℃, and the isothermal tempering time is 220-320 minute; Obtain iron body ball cast-iron grinding ball difficult to understand.
Quenchant of the present invention is without salt bath, but employing isothermal quenching oil avoids salt bath to pollute; Production cost is low, and the iron body ductile iron grinding ball hardness difficult to understand obtained is good, and hardness is 50--58HRC.
The accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is further described in detail.
The backfire product line structural representation that Fig. 1 is the specific embodiment of the invention.
Embodiment
Thermal treatment process is the gordian technique of iron body ductile iron grinding ball production technique difficult to understand, and the present invention adopts that continuous push-down heat-treatment production line is quenched, tempering heat treatment.
The quench treatment process is: from casting production line, cast-iron grinding ball out is placed in the casher box on quenching line, and the casher box that then drive unit on quenching line will be equipped with cast-iron grinding ball immerses in isothermal quenching oil, and the oil temperature of isothermal quenching oil is controlled at 70-110 ℃; Time in quenching oil is 3-12 minute; Surface temperature control fuel-displaced after the cast-iron grinding ball isothermal quenching is at 200-270 ℃.Cooling time and the oil outlet temperature of different size iron body cast ball difficult to understand in isothermal quenching oil is as follows:
The temper process is: as shown in Figure 1, hydro-cylinder 1 and rolling wheel guide rails 3 are arranged on base 2, and process furnace 4 is arranged on rolling wheel guide rails 3 ends.Be placed on rolling wheel guide rails 3 tops after above-mentioned cast-iron grinding ball is fuel-displaced together with the casher box quenching, open process furnace 4 fire doors, send control signal to hydro-cylinder 1, impel the casher box that the push rod of hydro-cylinder 1 will be equipped with iron body abrading-ball difficult to understand to push in process furnace, close Compaction of Heating Furnace Door, iron body abrading-ball difficult to understand is heated to tempering.The isothermal tempering temperature is controlled at 260-320 ℃ in process furnace, and after the isothermal tempering time is 220-320 minute, obtaining hardness is the iron body ball cast-iron grinding ball difficult to understand of 50--58HRC.Above-mentioned quenching line and tempering line are linked by the productive temp of setting, and by PLC, are carried out, to reduce the impact of human factor.
Quenchant of the present invention is without salt bath, but employing isothermal quenching oil avoids salt bath to pollute; Production cost is low, and the iron body ductile iron grinding ball hardness difficult to understand obtained is good.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (2)
1. an iron body ductile iron grinding ball heat-treatment technology method difficult to understand, is characterized in that, described iron body ductile iron grinding ball difficult to understand is carried out to quench treatment, comprises with step:
Will be from casting production line cast-iron grinding ball out immerse immediately in isothermal quenching oil, the oil temperature of isothermal quenching oil is controlled at 70-110 ℃; Time in quenching oil is 3-12 minute; Going out oil surface temperature after described cast-iron grinding ball isothermal quenching is 200-270 ℃.
2. iron body ductile iron grinding ball heat-treatment technology method difficult to understand according to claim 1, is characterized in that, described iron body ductile iron grinding ball difficult to understand is carried out to temper, comprises with step:
After described cast-iron grinding ball quenching is fuel-displaced, send into immediately in tempering stove, the isothermal tempering temperature is controlled at 260-320 ℃, and the isothermal tempering time is 220-320 minute; Obtain iron body ball cast-iron grinding ball difficult to understand.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310360333.0A CN103451393B (en) | 2013-08-19 | 2013-08-19 | Heat treatment process of austempered ductile iron grinding balls |
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| CN201310360333.0A CN103451393B (en) | 2013-08-19 | 2013-08-19 | Heat treatment process of austempered ductile iron grinding balls |
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| CN103451393A true CN103451393A (en) | 2013-12-18 |
| CN103451393B CN103451393B (en) | 2016-08-17 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103898285A (en) * | 2014-03-04 | 2014-07-02 | 宁国市华丰耐磨材料有限公司 | High chromium ore grinding medium and thermal treatment quenching process thereof |
| CN103937945A (en) * | 2014-03-25 | 2014-07-23 | 常州南车汽车零部件有限公司 | Heat treatment technology for nodular cast iron piston casting and application thereof |
| CN105018696A (en) * | 2015-07-30 | 2015-11-04 | 宁国市华丰耐磨材料有限公司 | Heat processing technology method of austenitic ductile iron wear-resistant casting |
| CN105420594A (en) * | 2015-11-30 | 2016-03-23 | 宁国市华丰耐磨材料有限公司 | Isothermal-quenching nodular-cast-iron hammerhead containing carbide, preparing method of isothermal-quenching nodular-cast-iron hammerhead and application of isothermal-quenching nodular-cast-iron hammerhead |
| CN105420593A (en) * | 2015-11-30 | 2016-03-23 | 宁国市华丰耐磨材料有限公司 | Preparing method for long-life nodular-cast-iron hammerhead |
| CN105483333A (en) * | 2016-02-01 | 2016-04-13 | 王亮 | Heat treatment method of ADI casting |
| CN105969948A (en) * | 2016-07-25 | 2016-09-28 | 白城北奥新材料科技有限公司 | Oil cooling isothermal quenching production method for high-performance austempered ductile iron |
| CN105969947A (en) * | 2016-05-26 | 2016-09-28 | 安徽省宁国诚信耐磨材料有限公司 | Method of isothermal quenching thermal treatment production line |
| CN103937945B (en) * | 2014-03-25 | 2016-11-30 | 常州南车汽车零部件有限公司 | Technology for Heating Processing of spheroidal graphite cast-iron Piston Casting and application thereof |
| CN107586923A (en) * | 2017-10-23 | 2018-01-16 | 宁国市正兴耐磨材料有限公司 | A kind of making low-carbon low-chromium alloy wear-resistant ball quenching technical |
| CN109112389A (en) * | 2018-10-10 | 2019-01-01 | 武汉纺织大学 | A kind of cooling technique for preparing austenic globe body of control |
| CN110423865A (en) * | 2019-08-23 | 2019-11-08 | 宁国市华丰耐磨材料有限公司 | A kind of heat treatment method of Austria's iron body ductile iron abrading-ball |
| CN113755687A (en) * | 2021-07-20 | 2021-12-07 | 宁国市华丰耐磨材料有限公司 | Quenching heat treatment process for grinding ball production |
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2013
- 2013-08-19 CN CN201310360333.0A patent/CN103451393B/en active Active
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| CN1514034A (en) * | 2003-07-30 | 2004-07-21 | 包文华 | Production method of non alloy precooled isothermal bardening austenic globe body |
| CN101397601A (en) * | 2007-09-29 | 2009-04-01 | 湖南大学 | Heat treating technology for ausferrite spheroidal graphite cast iron |
| CN101638756A (en) * | 2008-08-21 | 2010-02-03 | 安徽省凤形耐磨材料股份有限公司 | Production process method of high-carbon multi-element alloy casting grinding ball |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103898285A (en) * | 2014-03-04 | 2014-07-02 | 宁国市华丰耐磨材料有限公司 | High chromium ore grinding medium and thermal treatment quenching process thereof |
| CN103937945A (en) * | 2014-03-25 | 2014-07-23 | 常州南车汽车零部件有限公司 | Heat treatment technology for nodular cast iron piston casting and application thereof |
| CN103937945B (en) * | 2014-03-25 | 2016-11-30 | 常州南车汽车零部件有限公司 | Technology for Heating Processing of spheroidal graphite cast-iron Piston Casting and application thereof |
| CN105018696A (en) * | 2015-07-30 | 2015-11-04 | 宁国市华丰耐磨材料有限公司 | Heat processing technology method of austenitic ductile iron wear-resistant casting |
| CN105420593A (en) * | 2015-11-30 | 2016-03-23 | 宁国市华丰耐磨材料有限公司 | Preparing method for long-life nodular-cast-iron hammerhead |
| CN105420593B (en) * | 2015-11-30 | 2018-01-12 | 宁国市华丰耐磨材料有限公司 | A kind of preparation method of high life spheroidal graphite cast-iron tup |
| CN105420594A (en) * | 2015-11-30 | 2016-03-23 | 宁国市华丰耐磨材料有限公司 | Isothermal-quenching nodular-cast-iron hammerhead containing carbide, preparing method of isothermal-quenching nodular-cast-iron hammerhead and application of isothermal-quenching nodular-cast-iron hammerhead |
| CN105483333A (en) * | 2016-02-01 | 2016-04-13 | 王亮 | Heat treatment method of ADI casting |
| CN105969947A (en) * | 2016-05-26 | 2016-09-28 | 安徽省宁国诚信耐磨材料有限公司 | Method of isothermal quenching thermal treatment production line |
| CN105969948B (en) * | 2016-07-25 | 2018-08-10 | 白城北奥新材料科技有限公司 | A kind of oil cooling isothermal hardening production method of high-performance austempered ductile iron |
| CN105969948A (en) * | 2016-07-25 | 2016-09-28 | 白城北奥新材料科技有限公司 | Oil cooling isothermal quenching production method for high-performance austempered ductile iron |
| CN107586923A (en) * | 2017-10-23 | 2018-01-16 | 宁国市正兴耐磨材料有限公司 | A kind of making low-carbon low-chromium alloy wear-resistant ball quenching technical |
| CN107586923B (en) * | 2017-10-23 | 2018-12-07 | 宁国市正兴耐磨材料有限公司 | A kind of making low-carbon low-chromium alloy wear-resistant ball quenching technical |
| CN109112389A (en) * | 2018-10-10 | 2019-01-01 | 武汉纺织大学 | A kind of cooling technique for preparing austenic globe body of control |
| CN110423865A (en) * | 2019-08-23 | 2019-11-08 | 宁国市华丰耐磨材料有限公司 | A kind of heat treatment method of Austria's iron body ductile iron abrading-ball |
| CN110423865B (en) * | 2019-08-23 | 2021-05-25 | 宁国市华丰耐磨材料有限公司 | Heat treatment method of ausferrite nodular cast iron grinding ball |
| CN113755687A (en) * | 2021-07-20 | 2021-12-07 | 宁国市华丰耐磨材料有限公司 | Quenching heat treatment process for grinding ball production |
| CN113755687B (en) * | 2021-07-20 | 2024-02-02 | 宁国市华丰耐磨材料有限公司 | Quenching heat treatment process for grinding ball production |
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Denomination of invention: Heat treatment process of austenitic nodular cast iron grinding ball Effective date of registration: 20220429 Granted publication date: 20160817 Pledgee: Ningguo Anhui rural commercial bank Limited by Share Ltd. Pledgor: NINGGUO HUAFENG WEAR-RESISTANT MATERIAL Co.,Ltd. Registration number: Y2022980005018 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20160817 Pledgee: Ningguo Anhui rural commercial bank Limited by Share Ltd. Pledgor: NINGGUO HUAFENG WEAR-RESISTANT MATERIAL Co.,Ltd. Registration number: Y2022980005018 |