CN103451393B - 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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- CN103451393B CN103451393B CN201310360333.0A CN201310360333A CN103451393B CN 103451393 B CN103451393 B CN 103451393B CN 201310360333 A CN201310360333 A CN 201310360333A CN 103451393 B CN103451393 B CN 103451393B
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- 229910001141 Ductile iron Inorganic materials 0.000 title claims abstract description 29
- 238000000227 grinding Methods 0.000 title claims abstract description 22
- 238000010438 heat treatment Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000010791 quenching Methods 0.000 claims abstract description 20
- 230000000171 quenching effect Effects 0.000 claims abstract description 20
- 229910001018 Cast iron Inorganic materials 0.000 claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 238000005496 tempering Methods 0.000 claims abstract description 15
- 238000005266 casting Methods 0.000 claims abstract description 9
- 238000007531 graphite casting Methods 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 abstract description 9
- 239000003921 oil Substances 0.000 description 12
- 229910052804 chromium Inorganic materials 0.000 description 8
- 239000011651 chromium Substances 0.000 description 8
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 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
- 238000005096 rolling process Methods 0.000 description 3
- 235000015170 shellfish Nutrition 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
- 239000011159 matrix material Substances 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
- 239000003082 abrasive agent Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 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
- 230000008676 import Effects 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 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
- 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
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- Heat Treatment Of Articles (AREA)
Abstract
The present invention relates to a kind of heat treatment process of austempered ductile iron grinding balls, described ferrum body ductile iron abrading-ball difficult to understand is carried out Quenching Treatment, comprise the following steps: cast-iron grinding ball out on casting production line is immersed in isothermal hardening oil immediately, the Oil-temperature control of isothermal hardening oil is at 70-110 DEG C, time in quenching oil is 3-12 minute, goes out oil surface temperature and be 200-270 DEG C after described cast-iron grinding ball isothermal hardening；Being immediately fed in tempering furnace by cast-iron grinding ball after fuel-displaced for quenching, isothermal tempering temperature controls at 260-320 DEG C, and the isothermal tempering time is 220-320 minute, obtains ferrum body ductile iron abrading-ball difficult to understand again.The hardening media of the present invention is without salt bath, but uses isothermal hardening oil, it is to avoid salt bath pollutes；Production cost is low, and the ferrum body ductile iron abrading-ball hardness difficult to understand obtained is good, and hardness is 50 58HRC.
Description
Technical field
The present invention relates to heat treatment process of austempered ductile iron grinding balls.
Background technology
All claiming shellfish body spheroidal graphite cast-iron difficult to understand or bainite ductile iron before domestic, title arguement is more, according to
The definition of GB/T24733-2009: " one is obtained with ferrum body difficult to understand by same temperature hardening heat treatment by spheroidal graphite cast-iron
(ausferrite) it is the casting alloy that intensity is high, plasticity is good of main base.Austempering ductile iron (austempered
Ductile iron) ferrum body spheroidal graphite cast-iron also referred to as difficult to understand, also known as meaning ADI.”
Owing to ferrum body spheroidal graphite cast-iron (ADI) difficult to understand has the combination properties such as high intensity, high tenacity, wear-resisting, resisting fatigue, in state
The economic every field of the people such as automobile, electromotor, agricultural machinery, engineering machinery, shipbuilding, railway, metallurgy, mine, electric power (bag
Include wind-powered electricity generation), the aspect such as weapons is widely used.
In terms of high-abrasive material, application also obtains positive effect, and ferrum body ductile iron abrading-ball abrasion in the wet grinding mill of mine difficult to understand reach
To the level of high chromium ball, reduce 40-50% than low chromium ball abrasion.Ferrum body ductile iron abrading-ball difficult to understand is to substitute in the wet grinding mill of mine
The product of the update of low chromium cast ball.If mine, the whole nation all uses ferrum body ductile iron abrading-ball difficult to understand, mine, whole nation abrading-ball is total
Consumption can reduce 50-60 ten thousand tons, and this is the vital measure of national energy-saving, reduction of discharging, decrement.
This material is because the material that used is all based on silicon, manganese, and this is the alloy material that China is rich, is not required to add dilute
The evanohm lacked, production cost is relatively low, and cost performance is moderate, be to be suitable for China's national situation, have the one of potential market
Wear-resistant material.
China successively develops ferrum body ductile iron abrading-ball material difficult to understand in the eighties, and demonstrates under wet grinding working condition
Superior performance, matrix quenched (or isothermal hardening) obtains the matrix based on bainite.Although its hardness ratio high chromium white
Cast iron class is the poorest, but toughness is better than high-chromium white cast iron, and cost performance is better than rich chromium cast iron material, particularly rich chromium cast iron and wants
Use substantial amounts of ferrochrome, and Ge Shi China needs the goods and materials of a large amount of imports, and ferrochrome is used on abrading-ball in a large number is the most recyclable
With regeneration, therefore mine grinding use high chromium casting ball not meet China's national situation.
Owing to cast iron casting ball technology controlling and process in a large amount of production processes difficult to understand there is also some difficult problems, Tsing-Hua University Wu Dehai professor exists
Developing shellfish body spheroidal graphite casting abrading-ball difficult to understand the beginning of the eighties, do not have large-scale popularization to apply up to now, only minority factory is producing and is answering
With. main difficult technical is:
First is nodularization that good molten iron casting time is usually no more than 12 minutes, and time length will produce nodularization and gather and move back, nodularization
Rate declines, and it is more difficult to control in production；
Second is that isothermal hardening or the equipment of continuous quenching, cooling medium do not have been resolved, and the eighties can only use chassis
Stove heats, and is interrupted and produces, it is impossible to realize the Automated condtrol of quenching+tempering operation at heat.Hardening media can only use at that time
Waterglass, and waterglass kind is also a lot, modulus and concentration are different, and cooling effect difference is very big, in actual production very
Difficult grasp；The more important thing is waterglass 400 DEG C of cool below excessive velocities, and ferrum body spheroidal graphite cast-iron difficult to understand is wished at 400 DEG C
Following slow cooling, obtains lower shellfish body, therefore uses waterglass to cause ferrum weight difficult to understand unstable, during Fragmentation Phenomena as hardening media
Having generation, this is also the main cause that ferrum body cast ball the most difficult to understand produces the most in a large number and uses.
Domestic production Austria ferrum body nodular iron casting heat treatment great majority are to use salt bath austempering at present, but salt bath austempering
Equipment is more complicated, and the salt steam that sodium nitrate, potassium nitrate distribute when high temperature has strong corrosivity, makes environment
Becoming adverse influence, quenching workpiece also needs to rinse with water, is therefore also equipped with water treatment facilities, equipment purchasing expense and production
Cost is high, uses this technique and equipment to be not have competitiveness for low value-added abrading-ball.
Summary of the invention
The technical problem to be solved is to provide a kind of heat treatment process of austempered ductile iron grinding balls, overcomes
The ferrum weight difficult to understand that prior art exists is unstable, and quenching apparatus is complicated, and production cost is high, and environment is had adverse influence
Defect.
For solving above-mentioned technical problem, the present invention provides a kind of heat treatment process of austempered ductile iron grinding balls, and it is special
Levy and be, described ferrum body ductile iron abrading-ball difficult to understand is carried out Quenching Treatment, comprises the following steps:
1) cast-iron grinding ball out on casting production line is immersed in isothermal hardening oil immediately, the oil temperature of isothermal hardening oil
Controlling at 70-110 DEG C, the time in quenching oil is 3-12 minute, fuel-displaced after described cast-iron grinding ball isothermal hardening
Surface temperature be 200-270 DEG C；
2) by step 1) in quenching fuel-displaced after cast-iron grinding ball be immediately fed in tempering furnace, isothermal tempering temperature controls
260-320 DEG C, the isothermal tempering time is 220-320 minute, obtains ferrum body ductile iron abrading-ball difficult to understand.
The hardening media of the present invention is without salt bath, but uses isothermal hardening oil, it is to avoid salt bath pollutes；Production cost is low,
The ferrum body ductile iron abrading-ball hardness difficult to understand obtained is good, and hardness is 50--58HRC.
Accompanying drawing explanation
With detailed description of the invention, technical scheme is further described in detail below in conjunction with the accompanying drawings.
Fig. 1 is the backfire product line structural representation of the specific embodiment of the invention.
Detailed description of the invention
Technology for Heating Processing is the key technology of ferrum body ductile iron abrading-ball production technology difficult to understand, and the present invention uses at continuous push-down heat
Reason production line carries out quenching, tempering heat treatment.
Quenching Treatment process is: from casting production line, cast-iron grinding ball out is placed in the casher box on quenching line, then
Driving means on quenching line will be equipped with the casher box of cast-iron grinding ball and immerses in isothermal hardening oil, the oil temperature control of isothermal hardening oil
System is at 70-110 DEG C；Time in quenching oil is 3-12 minute；Surface fuel-displaced after cast-iron grinding ball isothermal hardening
Temperature controls at 200-270 DEG C.Different size Austria ferrum body cast ball cool time in isothermal hardening oil and oil outlet temperature
As follows:
Temper process is: as it is shown in figure 1, hydraulic cylinder 1 and rolling wheel guide rails 3 are arranged on base 2, heating furnace 4
It is arranged on rolling wheel guide rails 3 end.By above-mentioned cast-iron grinding ball together with casher box quenching fuel-displaced after be placed on above rolling wheel guide rails 3,
Open heating furnace 4 fire door, send control signal to hydraulic cylinder 1, promote the push rod of hydraulic cylinder 1 to will be equipped with ferrum body abrading-ball difficult to understand
Casher box pushes in heating furnace, closes Compaction of Heating Furnace Door, and ferrum body abrading-ball difficult to understand is carried out heating tempering.Isothermal tempering temperature in heating furnace
Degree controls at 260-320 DEG C, and the isothermal tempering time is after 220-320 minute, and obtaining hardness is 50--58HRC's
Ferrum body ball cast-iron grinding ball difficult to understand.Above-mentioned quenching line and tempering line link by the productive temp set, PLC perform, with
Reduce the impact of anthropic factor.
The hardening media of the present invention is without salt bath, but uses isothermal hardening oil, it is to avoid salt bath pollutes；Production cost is low,
The ferrum body ductile iron abrading-ball hardness difficult to understand obtained is good.
It should be noted last that, above detailed description of the invention only in order to technical scheme to be described and unrestricted,
Although the present invention being described in detail with reference to preferred embodiment, it will be understood by those within the art that, can
Technical scheme is modified or equivalent, without deviating from spirit and the model of technical solution of the present invention
Enclosing, it all should be contained in the middle of scope of the presently claimed invention.
Claims (1)
1. a heat treatment process of austempered ductile iron grinding balls, it is characterised in that to described ferrum body spheroidal graphite casting difficult to understand
Ferrum abrading-ball carries out Quenching Treatment, comprises the following steps:
1) cast-iron grinding ball out on casting production line is immersed in isothermal hardening oil immediately, the oil temperature of isothermal hardening oil
Controlling at 70-110 DEG C, the time in quenching oil is 3-12 minute, fuel-displaced after described cast-iron grinding ball isothermal hardening
Surface temperature be 200-270 DEG C；
2) by step 1) in quenching fuel-displaced after cast-iron grinding ball be immediately fed in tempering furnace, isothermal tempering temperature controls
260-320 DEG C, the isothermal tempering time is 220-320 minute, obtains ferrum body ductile iron abrading-ball difficult to understand.
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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 CN103451393A (en) | 2013-12-18 |
| CN103451393B true CN103451393B (en) | 2016-08-17 |
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Families Citing this family (11)
| 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 |
| 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 |
| CN105420594B (en) * | 2015-11-30 | 2018-01-12 | 宁国市华丰耐磨材料有限公司 | A kind of carbide-containing austempering ductile iron tup and preparation method thereof, application |
| 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 |
| 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 |
| 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 |
| CN109112389B (en) * | 2018-10-10 | 2019-08-02 | 武汉纺织大学 | A kind of cooling technique for preparing austenic globe body of control |
| 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 |
| 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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| 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 |
-
2013
- 2013-08-19 CN CN201310360333.0A patent/CN103451393B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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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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