CN102634724A - Machine tool guide rail cast iron and preparation method thereof - Google Patents
Machine tool guide rail cast iron and preparation method thereof Download PDFInfo
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- CN102634724A CN102634724A CN2012101480721A CN201210148072A CN102634724A CN 102634724 A CN102634724 A CN 102634724A CN 2012101480721 A CN2012101480721 A CN 2012101480721A CN 201210148072 A CN201210148072 A CN 201210148072A CN 102634724 A CN102634724 A CN 102634724A
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Abstract
The invention discloses machine tool guide rail cast iron and a preparation method thereof. The preparation method for the cast iron comprises the following steps of: feeding new iron, titanium iron and ferrophosphorus into a melting furnace; after the three materials are melted, melting in the furnace are poured into a casting ladle, and performing inoculation treatment; pre-adding electrolysis copper and high-silicon titanium iron into a cavity of the casting ladle, and melting and uniformly dispersing the electrolysis copper and the high-silicon titanium iron into the melts in the casting ladle by using the temperature and the scouring action of the melts; pouring the melts in the casting ladle, which are subjected to inoculation, into a die cavity, cooling and solidifying, and forming; and heating and quenching formed cast iron in an ultrasonic frequency furnace, so as to form a quenched layer of which the thickness is within 1 to 2 millimeters on the surface of the cast iron. In order to further improve the dispersion degree of the electrolysis copper and the high-silicon titanium iron in the casting ladle, when the melts are poured into the casting ladle, ultrasonic is sent into the casting ladle.
Description
Technical field
The present invention relates to a kind of guide rail cast iron on the lathe and preparation method thereof that is applied in.
Background technology
The wear resistance of machine tool guideway is the key factor that influences machine tool accuracy retentivity and work-ing life; Non-wear resistance guide rail surface after rolling for a long time through roller, viscous deformation can occur or the roughness on microcosmic becomes big; The variation of guide rail surface can react on roller surface again, brings influence for the slipperiness of roller surface.Existing machine tool guide rail wear resistance is relatively poor relatively, except and constitute the proportioning between the various compositions of guide rail, and the dispersion of each composition is inhomogeneous have outside the Pass, the treatment process when also preparing with cast iron is relevant.Existing most machine tool guideway cast iron all is to put into corresponding material according to certain proportioning to carry out melting in the smelting furnace in the preparation, pours melts in the great waves casting bag into after melting finishes again and is cured moulding.Though these compositions can be mixed in together in fusion process, the dispersity between the various compositions can not guarantee.Because physics, the chemical property of each composition itself are not quite similar; The material of input in smelting furnace is in by fusion process; Certain physical, chemical transformation take place sometimes, when these variations take place, tend to association and be difficult to the dispersive combination, this can have influence on the homogeneity of whole casting system; The homogeneity missionary society of casting system has influence on the contribution of each composition to the guide rail wear resistance, and then can have influence on the wear resistance of guide rail.
Summary of the invention
For overcoming above-mentioned defective, the technical issues that need to address of the present invention are: a kind of novel machine tool guideway cast iron and preparation method thereof is provided, after the guide rail cast iron of preparing through this preparation method processes machine tool guideway, can significantly improves wear resistance.
For solveing the technical problem; The chemical ingredients of machine tool guideway cast iron of the present invention is that 2.8-3.1%, Si are that 1.3-1.6%, Mn are that 0.6-0.9%, P are that 0.4-0.6%, Cu are that 0.8-1.0%, Ti are 0.1-0.15%, < 0.1%, surplus is an iron to S for (mass percent): C.The physical parameter of this cast iron after the moulding: tensile strength>200MPa, bending strength>400 MPa, amount of deflection are that 2.5-3.0mm, hardness are 190-240 HBs.
Copper itself has certain ductility, and under microstate, copper can carry out self-repair in use surperficial some damages that produced of machine tool guideway.Titanium mix the intensity that can effectively improve machine tool guideway.
Cast iron Preparation Method of the present invention comprises that the following step gathers:
Select materials: selecting the trade mark for use is the new pig iron of Z15 or Z20, ferrotianium and the ferrophosphorus mixing for standby use that the trade mark is Ti20-Ti25, and the shared three's of ferrophosphorus mass percent is 12-18%;
Melting: put into melting in medium-frequency induction furnace or the double melting stove to selected material; When treating that the temperature of melts reaches 1400-1420 ℃ in the stove; Continue melting 10-15min, in continuing fusion process, the temperature of melts remains on 1400-1420 ℃ in the stove;
Casting is prepared: get casting ladle, adding purity in the die cavity of casting ladle respectively is the ferro-silico-titanium of 3-6mm greater than 99.75% electrolytic copper powder and granularity;
The filling of casting ladle: in the casting ladle that has added above-mentioned electrolytic copper and ferro-silico-titanium, pour melts in the stove into; During above-mentioned casting was prepared to go on foot and gathered, it is 0.8-1.0% that the amount that electrolytic copper and ferro-silico-titanium added has determined to contain the Cu mass percent in the casting ladle content, contain the ferro-silico-titanium mass percent was 0.5-0.6%;
Inoculation: make the temperature of casting ladle content reduce to 1370-1390 ℃;
Casting: pour the casting ladle content in the mold cavity into the cooling curing moulding;
Quench: the Cast Iron Surface after the cast molding is carried out quench treatment, and depth of hardening is 1-2mm.
The difference of preparation method of the present invention and existing ordinary machine tool guide rail cast iron Preparation Method is: when 1, in stove, feeding intake, just drop into the described new pig iron, ferrotianium and ferrophosphorus earlier.Be difficult in the process of these three kinds of material meltings in smelting furnace producing being difficult to the dispersive combination, three kinds of compositions that are molten state are fully mixed in whole system.2, directly be added to described electrolytic copper powder, ferro-silico-titanium in advance in the die cavity of casting ladle, utilize the temperature of melts in the stove itself that described electrolytic copper powder, ferro-silico-titanium are dissolved in the casting ladle content.When in casting ladle, falling in the stove melts; The effect of washing away of melts makes electrolytic copper powder and the good dispersivity of ferro-silico-titanium in the casting ladle content; Electrolytic copper powder and ferro-silico-titanium by thaw process in; Because melts itself has formed uniform dispersed system in the stove, the difficult formation with the interior melts of stove of electrolytic copper powder and said ferro-silico-titanium is difficult to the dispersive combination.3, the casting ladle content is carried out inoculation, make its temperature be cooled to 1370-1390 ℃, and then in mould, pour this content into by 1400-1420 ℃.The structure that this can improve machine tool guideway cast iron helps to promote the wear resistance of machine tool guideway.Reduce the combining weight of titanium and carbon, oxygen, improve the intensity of machine tool guideway.4, the Cast Iron Surface after the moulding is carried out quench treatment in the ultrasonic frequency induction furnace, and purpose is to promote the hardness of Cast Iron Surface, and in quenching process, the deformation quantity of cast iron is little, is convenient to the assurance of guide rail linearity.
As further optimization, in gathering in the said casting ladle filling step, pour in the process of melts in the stove and in casting ladle, send UW.Sending hyperacoustic purpose is that electrolytic copper powder and ferro-silico-titanium in the casting ladle can promptly be distributed in the interior melts of stove, so that electrolytic copper powder and ferro-silico-titanium are melted rapidly, in order to avoid half-cooked phenomenon in the casting ladle content, occurs.The wear resistance of machine tool guideway is decided by the degree of scatter of copper in whole system to a certain extent, and the degree of scatter of copper in whole system is high more, and the repairing effect of copper just can be given full play to more.The degree of scatter of copper in whole system is low more, and the wear resistance of guide rail is poor more.When copper is enriched on the guide rail surface, be prone to make guide rail generation viscous deformation, copper is enriched in guide rail inside, can have influence on anti-the subduing property of guide rail, and it is big that the fragility of guide rail becomes.
The present invention has following effect: advantages of good casting is arranged; Good fluidity, homogeneous microstructure, stress is little; Higher hardness, sufficiently high intensity and good wear resistance are arranged; Founding is uncomplicated, and casting quality is controlled easily.Defectives such as hot tearing, hot-short, slag inclusion and pore can not appear.Compare with the ordinary machine tool guide rail, the machine tool guideway wear resisting property prepared by cast iron of the present invention improves 1.5-2 times.
Embodiment
The chemical ingredients of machine tool guideway cast iron of the present invention is that 2.8-3.1%, Si are that 1.3-1.6%, Mn are that 0.6-0.9%, P are that 0.4-0.6%, Cu are that 0.8-1.0%, Ti are 0.1-0.15%, < 0.1%, surplus is an iron to S for (mass percent): C; The physical parameter of this cast iron after the moulding: tensile strength>200MPa, bending strength>400 MPa, amount of deflection are that 2.5-3.0mm, hardness are 190-240 HBs.
The chemical ingredients of this machine tool guideway cast iron and the content of each composition are to be determined by the various inventory for preparing in the process at cast iron to be added, and the various physical parameters that this machine tool guideway cast iron is possessed to be amount and kind and preparing methods by the material that adds determine.
The preparation method of this machine tool guideway cast iron comprises that the following step gathers:
Select materials: selecting the trade mark for use is the new pig iron of Z15 or Z20, ferrotianium and the ferrophosphorus mixing for standby use that the trade mark is Ti20-Ti25, and the shared three's of ferrophosphorus mass percent is 12-18%.
Melting: put into melting in medium-frequency induction furnace or the double melting stove to selected material; When treating that the temperature of melts reaches 1400-1420 ℃ in the stove; Continue melting 10-15min, in continuing fusion process, the temperature of melts remains on 1400-1420 ℃ in the stove.
Casting is prepared: get casting ladle, adding purity in the die cavity of casting ladle respectively is the ferro-silico-titanium of 3-6mm greater than 99.75% electrolytic copper powder and granularity.
The filling of casting ladle: in the casting ladle that has added above-mentioned electrolytic copper and ferro-silico-titanium, pour melts in the chilled stove into; During above-mentioned casting was prepared to go on foot and gathered, it is 0.8-1.0% that the amount that electrolytic copper and ferro-silico-titanium added has determined to contain the Cu mass percent in the casting ladle content, contain the ferro-silico-titanium mass percent was 0.5-0.6%;
Inoculation: make the temperature of casting ladle content reduce to 1370-1390 ℃;
Casting: pour the casting ladle content in the mold cavity into the cooling curing moulding;
Quench: the Cast Iron Surface after the cast molding is carried out quench treatment, and depth of hardening is 1-2mm.
In above-mentioned this preparation method; Ferro-silico-titanium be selected from the trade mark be FeTi30-A, FeTi30-B, FeTi40-A, FeTi40-B one or more; Difference according to the selected trade mark; The amount that ferro-silico-titanium added is difference slightly, but should guarantee that the chemical ingredients in the machine tool guideway cast iron after the moulding satisfies the content requirement of each Chemical Composition in the machine tool guideway cast iron of the present invention.
In gathering in the step of quenching, the ultrasonic frequency induction heating equipment that described ultrasonic frequency induction furnace selects for use Zhengzhou state rhythm Electron Technology Co., Ltd to produce is provided with copper pipe in this heating installation, is provided with ruhmkorff coil in the periphery of copper pipe.After the ruhmkorff coil energising; Machine tool guideway cast iron after moulding speed with 40cm/min in copper pipe is advanced; The part of machine tool guideway cast iron in copper pipe can produce inductive current; The surface action of electric current makes machine tool guideway Cast Iron Surface enrichment electric current, machine tool guideway Cast Iron Surface obtain heating, and its temperature inside does not have too big variation.The water that promptly past machine tool guideway Cast Iron Surface sprays normal temperature in heating installation in the 2-3S after the machine tool guideway Cast Iron Surface is heated quenches with realization.
In gathering in the filling of the casting ladle step, when falling in the stove melts in the casting ladle, promptly in casting ladle, send UW; UW is to send with the mode in continuous or gap; Time length is 60-150S, and after the casting ladle content capacity, hyperacoustic transmission is still in lasting for some time.This hyperacoustic vibrational frequency is between 10-50kh, and hyperacoustic output rating is 1000-3500kw, and the wave amplitude width is 10-30 μ m.
Claims (3)
1. a machine tool guideway cast iron is characterized in that, chemical ingredients is (mass percent):
C is that 2.8-3.1%, Si are that 1.3-1.6%, Mn are that 0.6-0.9%, P are that 0.4-0.6%, Cu are that 0.8-1.0%, Ti are 0.1-0.15%, < 0.1%, surplus is an iron to S;
The physical parameter of this cast iron after the moulding: tensile strength>200MPa, bending strength>400 MPa, amount of deflection are that 2.5-3.0mm, hardness are 190-240 HBs.
2. method for preparing the said cast iron of claim 1 comprises that the following step gathers:
Select materials: selecting the trade mark for use is the new pig iron of Z15 or Z20, ferrotianium and the ferrophosphorus mixing for standby use that the trade mark is Ti20-Ti25, and the shared three's of ferrophosphorus mass percent is 12-18%;
Melting: put into melting in medium-frequency induction furnace or the double melting stove to selected material; When treating that the temperature of melts reaches 1400-1420 ℃ in the stove; Continue melting 10-15min, in continuing fusion process, the temperature of melts remains on 1400-1420 ℃ in the stove;
Casting is prepared: get casting ladle, adding purity in the die cavity of casting ladle respectively is the ferro-silico-titanium of 3-6mm greater than 99.75% electrolytic copper powder and granularity;
The filling of casting ladle: in the casting ladle that has added above-mentioned electrolytic copper and ferro-silico-titanium, pour melts in the stove into; During above-mentioned casting was prepared to go on foot and gathered, it is 0.8-1.0% that the amount that electrolytic copper and ferro-silico-titanium added has determined to contain the Cu mass percent in the casting ladle content, contain the ferro-silico-titanium mass percent was 0.5-0.6%;
Inoculation: make the temperature of casting ladle content reduce to 1370-1390 ℃;
Casting: pour the casting ladle content in the mold cavity into the cooling curing moulding;
Quench: the Cast Iron Surface after the cast molding is carried out quench treatment, and depth of hardening is 1-2mm.
3. preparation method according to claim 2 is characterized in that, in gathering in the said casting ladle filling step, pours in the process of melts in the stove and in casting ladle, sends UW.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012101480721A CN102634724A (en) | 2012-05-15 | 2012-05-15 | Machine tool guide rail cast iron and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101480721A CN102634724A (en) | 2012-05-15 | 2012-05-15 | Machine tool guide rail cast iron and preparation method thereof |
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| CN102634724A true CN102634724A (en) | 2012-08-15 |
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| CN2012101480721A Pending CN102634724A (en) | 2012-05-15 | 2012-05-15 | Machine tool guide rail cast iron and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106367675A (en) * | 2016-11-03 | 2017-02-01 | 广西大学 | Heat treatment method for phosphor copper abrasion-resistant cast iron |
| CN106435349A (en) * | 2016-11-03 | 2017-02-22 | 广西大学 | Phosphor copper wear resistant cast iron and preparation method thereof |
| CN108085624A (en) * | 2016-11-21 | 2018-05-29 | 宜兴市帝洲新能源科技有限公司 | A kind of guide material of optoelectronic device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4891076A (en) * | 1986-12-22 | 1990-01-02 | Ford Motor Company | Gray cast iron having both increased wear resistance and toughness |
| JPH028344A (en) * | 1988-06-27 | 1990-01-11 | Kitamitsu Kinzoku Kogyo Kk | Spheroidal graphite cast iron and joining parts made of spheroidal graphite cast iron |
| CN1040226A (en) * | 1988-09-30 | 1990-03-07 | 广西大学 | Phosphorus, copper, chromium, titanium phosphorus series wear-resistant cast iron material |
| CN102230124A (en) * | 2011-06-16 | 2011-11-02 | 芜湖市金贸流体科技股份有限公司 | Anti-wearing heat-resisting cast iron and preparation method thereof |
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2012
- 2012-05-15 CN CN2012101480721A patent/CN102634724A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4891076A (en) * | 1986-12-22 | 1990-01-02 | Ford Motor Company | Gray cast iron having both increased wear resistance and toughness |
| JPH028344A (en) * | 1988-06-27 | 1990-01-11 | Kitamitsu Kinzoku Kogyo Kk | Spheroidal graphite cast iron and joining parts made of spheroidal graphite cast iron |
| CN1040226A (en) * | 1988-09-30 | 1990-03-07 | 广西大学 | Phosphorus, copper, chromium, titanium phosphorus series wear-resistant cast iron material |
| CN102230124A (en) * | 2011-06-16 | 2011-11-02 | 芜湖市金贸流体科技股份有限公司 | Anti-wearing heat-resisting cast iron and preparation method thereof |
Non-Patent Citations (1)
| Title |
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| 刘东騋等: "机床导轨用含磷耐磨铸铁的研究", 《东北工学院学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106367675A (en) * | 2016-11-03 | 2017-02-01 | 广西大学 | Heat treatment method for phosphor copper abrasion-resistant cast iron |
| CN106435349A (en) * | 2016-11-03 | 2017-02-22 | 广西大学 | Phosphor copper wear resistant cast iron and preparation method thereof |
| CN108085624A (en) * | 2016-11-21 | 2018-05-29 | 宜兴市帝洲新能源科技有限公司 | A kind of guide material of optoelectronic device |
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Application publication date: 20120815 |