CN1661125A - Cast iron material, seal material and the production method - Google Patents
Cast iron material, seal material and the production method Download PDFInfo
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- CN1661125A CN1661125A CN2005100528564A CN200510052856A CN1661125A CN 1661125 A CN1661125 A CN 1661125A CN 2005100528564 A CN2005100528564 A CN 2005100528564A CN 200510052856 A CN200510052856 A CN 200510052856A CN 1661125 A CN1661125 A CN 1661125A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
- C22C37/08—Cast-iron alloys containing chromium with nickel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3436—Pressing means
- F16J15/344—Pressing means the pressing force being applied by means of an elastic ring supporting the slip-ring
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Abstract
A cast iron material composed of C, Si, Mn, Ni, Cr and the rest composed of Fe and inevitable impurities, wherein contents of said C, Si, Mn, Ni and Cr with respect to the entire cast iron material are C: 2.9 to 3.8 wt %, Si: 1.0 to 2.5 wt %, Mn: 0 to 0.8 wt % (note that 0 is not included), Ni: 3.5 to 5.0 wt %, and Cr: 2.6 to 5.5 wt %. According to the present invention, a cast iron material having high hardness and excellent wear resistance and a seal material for a floating seal, formed by the cast iron material can be provided.
Description
Technical field
The present invention relates to sealing material and manufacture method thereof such as cast iron materials, floating seal, more in detail, the present invention relates to cast iron materials, sealing material and the manufacture method thereof of hardness height, abrasion performance characteristic and anti-abrasive property excellence.
Background technology
Floating seal is during as the sealing of crawler belt rollers such as building machinery, vehicle, must be purpose to the outside to prevent that muddy water and sand etc. from invading roller oil leak inner and that prevent to be filled in roller inside.Floating seal is made up of the fluctuate hermetical ring of a pair of fixation side fluctuate hermetical ring and rotation side, and a periphery that is arranged in spool is the state of engagement shaft not, promptly with the axle contact condition that becomes to float.In addition, each fluctuate hermetical ring of said fixing side and rotation side has the slipping plane of the contact of can sliding over each other respectively as the subtend face, by this slipping plane, uses under the state of mutual subtend.
Each fluctuate hermetical ring of said fixing side and rotation side is assembled in respectively in fixation side device and the rotation side device by O shape ring, and two fluctuate hermetical rings rely on the elastic force of O shape ring to form crimped status by slipping plane.Therefore,, all may seal, can prevent intrusion roller inside such as muddy water and sand, and prevent that oil leak is to the outside fixation side device and rotation side device no matter when rotating or not rotating.
Constitute the material of this fluctuate hermetical ring, require excellences such as hardness height, abrasion performance characteristic and anti-abrasive property etc., all use cast iron that casting makes etc. in the past.As such cast iron, (for example, Japanese patent laid-open 6-109141 communique, spy open flat 6-114538 communique) such as rich chromium cast iron, chrome molybdenum cast iron and Minvars for example arranged.
Rich chromium cast iron and chrome molybdenum cast iron all are the materials with high rigidity, particularly almost have same tissue with rich chromium cast iron, and Mo content is that the chrome molybdenum cast iron of 2～4 weight % has the high strength of HRC about 64.But in order to improve the hardness of rich chromium cast iron and chrome molybdenum cast iron, thermal treatment such as generally will quench, and carry out this thermal treatment apply very big internal load can for material itself, so the trend that exists physical strength to become to be highly brittle.
As Minvar, for example can enumerate hard (Ni-hard) cast iron of nickel.The Ni content of ni-hard cast iron is the cast iron with martensite substrate about 3.5～5.0 weight %, the wear resistant excellence.But ni-hard cast iron is also same with above-mentioned rich chromium cast iron, in order to improve toughness and wear resistant, carry out thermal treatments such as low-temperature annealing, so have the advantage of high rigidity, the trend that then exists physical strength to become and be highly brittle again on the other hand on the one hand.
Open the Japanese Patent spy and to have disclosed the fluctuate hermetical ring that will use as constituent material in the 2002-098236 communique by the sintered alloy that powder metallurgic method is made.This sintered alloy-made fluctuate hermetical ring is compared with the cast iron fluctuate hermetical ring of above-mentioned casting manufacturing, because the composition degree of freedom of its material is big, so have the high advantage of dimensional precision.In addition, the physical property of the sintered alloy of powder metallurgic method manufacturing depends on the material composition, so in order to change the physical property of sintered alloy, just must adjust material and form.But, only depend on and adjust the material composition, be limited to improving physical property, therefore, under the situation of using sintered alloy as the material that constitutes fluctuate hermetical ring, characteristics such as wear resistant should be inadequately.
Summary of the invention
The present invention finishes in view of above problem, its objective is the sealing material and the manufacture method thereof of floating seal of the good cast iron materials of hardness height, abrasion performance characteristic and anti-abrasive property being provided and being made of this cast iron materials etc.
The present inventor finds, cast iron materials at the sealing material that is used for floating seal etc., by the content of the element except that Cr is controlled at and the equal degree of above-mentioned ni-hard cast iron, Cr content is controlled at 2.6～5.5% degree of cast iron integral body, just can achieve the above object, thereby finish the present invention.
That is to say, cast iron materials of the present invention is the cast iron materials that is made of the Fe of C, Si, Mn, Ni, Cr and surplus and unavoidable impurities, the feature of this cast iron materials is that the content of above-mentioned C, Si, Mn, Ni and Cr is respectively with respect to above-mentioned cast iron materials integral body:
C:2.9～3.8 weight %,
Si:1.0～2.5 weight %,
Mn:0～0.8 weight % (but not comprising 0),
Ni:3.5～5.0 weight %,
Cr:2.6～5.5 weight %.
In cast iron materials of the present invention, P in the above-mentioned unavoidable impurities and the content of S are preferably with respect to above-mentioned cast iron materials integral body:
Below the P:0.5 weight %,
Below the S:0.5 weight %.
P and iron chemical combination form steadite (Fe
3P), has the tendency that reduces the cast iron machinability, makes the cast iron embrittlement.The tendency that S has the mobile variation that improves cast iron solidified point, make metal liquid-bath (liquation), the cast iron after the casting is become fragile.Therefore, in the cast iron content of P in the unavoidable impurities and S being good less.
In cast iron materials of the present invention, it better is to be selected from perlite, bainite, martensitic tissue or their mixed structure that substrate is organized, and has the miniaturization tissue that the carbide by dendroid cementite and Cr forms.
In the present invention, above-mentioned substrate tissue is more preferably the mixed structure based on martensite, preferably based on the perlite and the martensitic mixed structure of martensite.
In cast iron materials of the present invention, the hardness HRC of above-mentioned cast iron materials better is more than 65 more than 62.
Sealing material of the present invention is made of any cast iron materials of above-mentioned record.For sealing material, though there is no particular limitation, can exemplify mechanical seal, floating seal etc., good especially is that crawler belt roller (trackroller) is used floating seal.
Fluctuate hermetical ring of the present invention is made of above-mentioned sealing material, because its hardness height, abrasion performance characteristic and good corrosion resistance, so be well suited for being used for the crawler belt roller of building machinery, vehicle etc. with sealing.
The manufacture method of sealing material of the present invention is to have Fe and the formed metal liquid-bath of unavoidable impurities by C, Si, Mn, Ni, Cr and surplus are poured in the mold, carry out the manufacture method of sealing material of the operation of cooling curing again, the feature of this method is that the content of above-mentioned C, Si, Mn, Ni and Cr is respectively with respect to above-mentioned metal liquid-bath integral body:
C:2.9～3.8 weight %,
Si:1.0～2.5 weight %,
Mn:0～0.8 weight % (but not comprising 0),
Ni:3.5～5.0 weight %,
Cr:2.6～5.5 weight %,
In cooling curing, the speed of cooling of the sliding surface position of above-mentioned sealing material is faster than other parts.
In the manufacture method of sealing material of the present invention, because the metal liquid-bath is controlled in the compositing range of the present invention, the speed of cooling that makes the sliding surface position that becomes trim is faster and carry out mandatory preferential cooling than other parts, so can form the miniaturization tissue at slipping plane, slipping plane hardness and wear resistant are increased.In addition, as above-mentioned miniaturization tissue, dendroid cementite and disperse preferably based on the fine carbide of Cr, and also the substrate tissue is to be selected from perlite, bainite and martensitic tissue or their mixed structure.
In the manufacture method of sealing material of the present invention, P in the above-mentioned unavoidable impurities and the content of S with respect to above-mentioned cast iron materials integral body preferably are respectively:
Below the P:0.5 weight %,
Below the S:0.5 weight %.
In the manufacture method of sealing material of the present invention, be C in the speed of cooling (℃/minute) of the sliding surface position of above-mentioned sealing material
R1, the speed of cooling (℃/minute) of the other parts beyond the sliding surface position is C
R, preferably satisfy 1≤C at 2 o'clock
R1/C
R2≤2.5.
Perhaps, in the manufacture method of sealing material of the present invention, the speed of cooling when making the sliding surface position cooling curing is 300～700 ℃/minute, more preferably 500～700 ℃/minute.
According to the present invention, by the one-tenth that constitutes cast iron materials is grouped into the afore mentioned rules scope that is controlled at, promptly, by the content of the element beyond the Cr is controlled at and the ni-hard cast iron equal extent, making Cr content is 2.6～5.5 weight % with respect to the content of cast iron integral body, and the cast iron materials of hardness height, abrasion performance characteristic and anti-abrasive property excellence can be provided.In addition, as the material that constitutes sealing material, the cast iron materials of the application of the invention can provide the sealing material of floating seal with above-mentioned characteristic etc.
Also have, manufacture method according to sealing material of the present invention, the metal liquid-bath is controlled in the compositing range of the present invention, the slipping plane that will become the sealing material trim use than other parts faster speed of cooling carry out the force priority cooling, can form the miniaturization tissue at this slipping plane, the sealing material of floating seal etc. of hardness height, abrasion performance characteristic and the anti-abrasive property excellence of slipping plane especially can be provided.
Description of drawings
Below describe embodiments of the present invention with reference to the accompanying drawings in detail.
Fig. 1 is the sectional view of the floating seal of one of embodiments of the present invention.
Fig. 2 A, Fig. 2 B are the figure of surfaceness of the abrasion state of the slipping plane after the sample abrasion performance test of expression embodiments of the invention and comparative example.
Fig. 3 A, Fig. 3 B are the figure of the internal side diameter amount of movement of the seal strip after the abrasion performance of the sample of expression embodiments of the invention and comparative example is tested.
Embodiment
Floating seal 1
As shown in Figure 1, the floating seal 1 of one of embodiments of the present invention has a pair of fixation side fluctuate hermetical ring 2 and rotation side fluctuate hermetical ring 7, each fluctuate hermetical ring is arranged to and axle 20 discontiguous states in the periphery of axle 20, promptly is arranged to the state that floats from axle 20.
Fixation side fluctuate hermetical ring 2 is by O shape ring 18 and fixed frame 12 combinations, and on the other hand, rotation side fluctuate hermetical ring 7 is by O shape ring 19 and rotary frame 15 combinations.
Fixation side fluctuate hermetical ring 2 has the bigger atoll texture of external diameter of interior diameter ratio shaft 20, sets the groove 3 of prescribed depth at periphery.The bottom surface of this groove 3 is left from rotation side fluctuate hermetical ring 7, forms the conical surface 4 that moves closer to axle 20.
Equally, rotation side fluctuate hermetical ring 7 has the bigger atoll texture of external diameter of interior diameter ratio shaft 20, sets the groove 8 of prescribed depth at periphery.Form the conical surface 9 at this groove 8.
Fixation side fluctuate hermetical ring 2 and rotation side fluctuate hermetical ring 7 have slipping plane 5 and slipping plane 10, two fluctuate hermetical rings respectively respectively by slipping plane 5 and slipping plane 10 mutual subtends in the part of outer circumferential side in subtend face separately.
In addition, in the subtend face of fixation side fluctuate hermetical ring 2 and rotation side fluctuate hermetical ring 7, with slipping plane 5 successive in the part of all sides, form conical surfaces 6 that leave from rotation side fluctuate hermetical ring 7 gradually along with near axle 20.
Equally, in the subtend face of rotation side fluctuate hermetical ring 7 and fixation side fluctuate hermetical ring 2, with slipping plane 10 successive in the part of all sides form the conical surface 11.
Fixed frame 12 is fixed on an end of axle 20, and inner peripheral surface surrounds the periphery of fixation side fluctuate hermetical ring 2.At the inner peripheral surface of fixed frame 12 groove 13 of prescribed depth is set, this groove 13 forms the conical surface 14 that the same direction in bottom surface with the groove 3 of the periphery of fixation side fluctuate hermetical ring 2 tilts.
In addition, fixation side fluctuate hermetical ring 2 and fixed frame 12 and rotation side fluctuate hermetical ring 7 and rotary frame 15 combine by O shape ring 18 and O shape ring 19 respectively, and this O shape ring 18 and O shape ring 19 are to be made by the material with elastic force.And, rely on O shape ring 18 and O shape to encircle 19 elastic force, fixation side fluctuate hermetical ring 2 and rotation side fluctuate hermetical ring 7 are crimped on together by slipping plane 5 and slipping plane 10, between two slipping planes 5 and 10, no matter rotary frame 15 rotates the structure that all is sealing.
Fixation side and rotation side fluctuate hermetical ring 2,7
Fixation side fluctuate hermetical ring 2 and rotation side fluctuate hermetical ring 7 usefulness cast iron materials of the present invention constitute.
Cast iron materials of the present invention is made of the Fe (iron) and the unavoidable impurities of C (carbon), Si (silicon), Mn (manganese), Ni (nickel), Cr (chromium) and surplus.
By changing the content of C (carbon), can control the amount of the carbide such as cementite that constitute cold quenching (chill) tissue.In addition, C has the effect that promotes the tree-shaped crystallization of crystal grain, adjusts the mother metal tissue.The content of C between 2.5～4.0 weight %, is preferably 2.9～3.8 weight % corresponding to cast iron materials integral body, more preferably 3.2～3.7 weight %.If the content of C very little, then the cementite content in the miniaturization tissue tails off, and has the tendency of the machinability deterioration of wear resistant and mother metal.If content is too high, the cementite alligatoring in the cold quenching tissue makes to be easy to generate the space that forms because of remelting in the miniaturization tissue, and in addition, quantity of graphite increases, and has the tendency of cast iron strength degradation.
Si (silicon) has the graphited effect of the cast iron after carbon dissociated out, promotes to cast from the pig iron, also have the effect of impelling tree-shaped crystallization of crystal grain or column crystallization simultaneously.The content of Si between 1.0～3.0 weight %, is preferably 1.5～2.5 weight % with respect to cast iron materials integral body, more preferably 2.0～2.5 weight %.If the content of Si very little, can not promote the sclerosis of mother metal, and all there are downward trend in the miniaturization of mother metal self and machinability.If content is too high, then there is the toughness downward trend in the free surplus of carrying out of carbon.
Mn (manganese) forms manganese sulfide with S (sulphur) chemical combination, has inhibition because of sneaking into the dysgenic effect that S causes in the cast iron, promotes to organize the effect of miniaturization, and suppresses greying that causes because of interpolation Ni and the effect of improving substrate.The content of Mn is with respect to cast iron materials integral body between 0～0.8 weight % (but not containing 0).If content is too high, then exists and organize miniaturization remarkable, the tendency that cast iron embrittlement or machinability descend.
Ni (nickel) not be because can form carbide in cast iron, thus have the effect that promotes greying, suppresses white pig ironization, and the effect that makes tissue and hardness homogenization.The content of Ni between 3.5～5.5 weight %, is preferably 4.0～5.0 weight % with respect to cast iron materials integral body, more preferably 4.2～4.5 weight %.If particularly the content of Ni is controlled in the above-mentioned scope, just can makes the substrate formation of martensite.If the content of Ni is very little, then there is the trend that can not get above-mentioned effect, if content is too high, then there are austenite bainiteization residual in the substrate, the tendency of cast iron strength degradation.
Cr (chromium) has the effect that forms the high rigidity fine carbide, improves abrasion performance characteristic and substrate intensity.The content of Cr between 2.0～6.5 weight %, is preferably 2.5～6.0 weight % with respect to cast iron materials integral body, more preferably 2.6～5.5 weight %.Be adjusted at more than the 2.0 weight % by the content that makes Cr, be preferably 2.5 weight %, 2.6 weight % more preferably can be with the carbide solid solution of Cr in cementite.Especially by the combination solid solution cementite and the martensite substrate of Cr carbide, can obtain the effect that cast iron hardness improves.If the content of Cr is very little, then there is the trend that can not get above-mentioned effect, if content is too high, then exist mother metal cast iron decline hardness to become too high, machinability deterioration, the tendency of difficult cutting.
In the present invention, especially Ni content is controlled in the above-mentioned scope, can makes the substrate formation of martensite of cast iron materials.And, by making the substrate formation of martensite, can make the cast iron materials high strength.On the other hand, Ni has the graphited effect of promotion.Therefore,, then exist the quantitative change of greying carbon element to get too much if the content of Ni is too high, and the tendency of cast iron materials strength degradation.
Therefore, by further adding the Cr of afore mentioned rules amount, allow Cr and carbon element chemical combination among the present invention, form the carbide of Cr.Therefore,, can make carbon be transformed into the carbide of Cr, so can suppress because the increase (greying of carbon) of the quantity of graphite that interpolation Ni causes by adding Cr.Meanwhile, add Cr, can form fine and high-intensity carbide, so can improve wear resistant by pressing the afore mentioned rules amount.In addition, be solid-solubilized in the cementite by carbide especially this Cr, with this solid solution cementite and the martensite substrate combination of Cr, can improve the hardness of cast iron.
In addition, as the back will be described in detail, be grouped into by one-tenth and be controlled in the afore mentioned rules scope cast iron, in its manufacturing process, in the liquid-bath of cooling curing metal, to slipping plane 5 and 10 with than other parts faster speed of cooling preferentially force the cooling, just the structure of cast iron of slipping plane can be transformed into the miniaturization tissue, especially can improve the hardness and the abrasion performance characteristic of slipping plane.
As above-mentioned unavoidable impurities, for example can enumerate P (phosphorus) and S (sulphur) etc., but the content of these unavoidable impurities is being good less.
P and iron chemical combination form steadite (Fe
3P), have the machinability that reduces cast iron, the tendency that makes the cast iron embrittlement.The content of P is few more good more, better is below 0.5 weight % with respect to cast iron materials integral body, is more preferably below 0.3 weight %.
The tendency that S has the zero pour, the mobile variation that makes the metal liquid-bath that improve cast iron, the cast iron after the casting is become fragile.Therefore, the content of S is being good less.With respect to cast iron materials integral body better is below 0.5 weight %, is more preferably below 0.1 weight %, and good again is below 0.05 weight %, and good especially is below 0.02 weight %.
In the present embodiment, the material as the fluctuate hermetical ring 2,7 that constitutes fixation side and rotation side because used cast iron materials of the present invention, can improve hardness.The hardness of fluctuate hermetical ring is haggled over more than 62 with Rockwell hardness HRC, better more than 64, is preferably in more than 65.
The manufacture method of the fluctuate hermetical ring 2,7 of fixation side and rotation side
Prepare to constitute the starting material of cast iron, the metal liquid-bath is made in its fusion, again this metal liquid-bath is solidified the fluctuate hermetical ring 2,7 of the fixation side and the rotation side of the floating seal 1 that just can make the formation present embodiment at the mold internal cooling.
At first, prepare starting material, these starting material with fusions such as calciners, are made the metal liquid-bath, cast iron after the casting is formed reached above-mentioned composition.Though there is no particular limitation to starting material, can enumerate coke, the pig iron and alloy iron etc.
Then, the metal liquid-bath that obtains as stated above is cast in the mold, in mold, carries out cooling curing then, obtain the fluctuate hermetical ring that constitutes by cast iron materials.In the present embodiment, in the liquid-bath of mold internal cooling curing metal, preferably use and have the slipping plane 5 to becoming trim respectively, 10 with than the other parts speed of cooling mold that carries out force priority refrigerative structure faster, and this sliding surface position is carried out the preferential cooling faster than other parts.In above-mentioned mold, as the method for force priority cooling sliding surface position, for example can be set forth in and refrigerant is flowed near the sliding surface position to carry out the refrigerative method, and metal pattern casting and centrifugal casting etc.
Use such mold, by to slipping plane 5,10 with than other parts faster speed of cooling carry out force priority cooling, can form the miniaturization tissue at the slipping plane of fluctuate hermetical ring.As such miniaturization tissue, better be the dendroid cementite and disperse, and substrate is organized and preferably is selected from perlite, bainite and martensitic tissue or their mixed structure based on the fine carbide of Cr.
When carrying out above-mentioned cooling curing,, be C in the speed of cooling (℃/minute) of the sliding surface position of above-mentioned sealing material as speed of cooling
R1, the speed of cooling (℃/minute) of the other parts beyond the sliding surface position is C
RIn the time of 2, relation therebetween is with 1≤C
R1/C
R2≤2.5 is good, 1≤C
R1/C
R2≤2.0 is better, 1＜C
R1/C
R2≤2.0 is best.
Perhaps, the speed of cooling of slipping plane 5,10 with 300～700 ℃/be divided into goodly, 500～700 ℃/minute are better.Speed of cooling is crossed the slow or too fast tendency that all exists above-mentioned miniaturization tissue to be difficult to form, so speed of cooling preferably is controlled in the above-mentioned scope.
In addition, in the present embodiment, it is very important forming above-mentioned miniaturization tissue according to above-mentioned cooling conditions at slipping plane 5,10, so also can carry out 400～500 ℃ of the temperature that forms as the miniaturization tissue based on the cooling of above-mentioned condition.That is, there is no particular limitation to formed miniaturization tissue cooling conditions afterwards at slipping plane 5,10, and suitably decision gets final product.
In the present embodiment, according to above-mentioned cooling conditions, disperseed the dendroid cementite and, can improve the intensity and the hardness of cast iron based on the miniaturization tissue of the fine carbide of Cr by on slipping plane, forming.Particularly because form fine cementite and, wear away so can prevent the grinding that comes off and cause crisp tissue to produce of the thick cementite for example in white pig iron, seen effectively based on the fine carbide of Cr.
In addition, it better is to be adjusted into perlite, bainite and martensitic mixed structure that the substrate of above-mentioned miniaturization tissue is organized, be more preferably the mixed structure based on martensite, best is based on martensite perlite and martensitic mixed structure can improve the hardness of substrate like this.
In the present embodiment, be grouped into by the one-tenth that will constitute cast iron and be adjusted into composition of the present invention, above-mentioned miniaturization tissue can be on slipping plane, formed,, the stabilization of the cold quenching degree of depth of the cold quenching tissue of miniaturization tissue can be realized forming especially by the addition of control Ni and Cr.
The hardness height of the floating seal of making through above technology 1 that is made of fixation side of the present invention and rotation side fluctuate hermetical ring 2,7, the abrasion performance characteristic is good, can perform well in such as the crawler belt roller of building machinery, vehicle etc. with sealing.
In addition, the invention is not restricted to above-mentioned embodiment, can do all changes within the scope of the invention.
For example in the above-described embodiment, as sealing material of the present invention, illustration floating seal, but sealing material of the present invention is not limited to floating seal, so long as the sealing material that the cast iron materials of above-mentioned composition constitutes gets final product.
Embodiment
Below, by more detailed embodiment the present invention is described, but the present invention is not limited to these embodiment.
At first, become to be grouped into the preparation starting material, these starting material are carried out heat treated (heating fusion) under 1600 ℃ temperature, cool off with 500 ℃/minute speed of cooling then, make the sample 1～5 of cast iron materials by each shown in the table 1.In addition, prepared chrome molybdenum cast iron, prepared 3 kinds of ni-hard cast irons as sample 7～9 as sample 6.
Then, mensuration, abrasion performance test and the corrosion test of Rockwell hardness the sample of each cast iron materials have been carried out.
The mensuration of Rockwell hardness is that the sample 1～9 of cast iron materials is made the shape that specimen shape is the closure size of external diameter φ 90.1mm, uses Rockwell hardness tester that slipping plane is measured.Measurement result is as shown in table 1.
In the abrasion performance test, at first sample 1,6 is made external diameter φ 90.1mm the closure size shape the restraint test sheet and with the whirl test sheet of shape, undertaken by making floating seal shown in Figure 1.Here, the restraint test sheet is equivalent to fixation side fluctuate hermetical ring 2, and the whirl test sheet is equivalent to rotate side fluctuate hermetical ring 7.Experimental atmosphere is the mixture that the outer circumferential side of restraint test sheet and whirl test sheet imposes mud (Arizona testDust (test dust)) 84 weight %, water 14 weight %, and interior all sides impose lubricating oil.Test conditions is, makes the whirl test sheet with the speed of rotation of 200rpm (positive dirction rotation 20 seconds, stop 20 seconds, opposite spin 20 seconds, stop 20 seconds) rotation, as a circulation, adds up to 10000 circulations with this.The abrasion state of the slipping plane after the abrasion performance test of sample 1,6 is shown in Fig. 2, and the internal side diameter amount of movement of the seal strip after the abrasion performance test is shown in Fig. 3.
Corrosion test is to adopt the test film of the closure size shape of making external diameter φ 90.1mm of sample 1, sample 6, sample 9, carries out with the salt spray testing machine.As test conditions, at first sealing face is cleaned with acetone, then experimental atmosphere is set at brine concentration 5 weight %, pH6.5～7.2,35 ℃ of temperature, humidity 95～98%, test period 1 hour.Behind the brine spray, test film is cleaned with basic solution, flows washing further to remove unnecessary corrosion thing with deionized water again, revalues the corrosion ratio of trim.
Table 1
| Specimen coding | Cast iron materials | HRC | ||||||||||
| Become to be grouped into (weight %) | Tissue | |||||||||||
| C | ??Si | ??Mn | ?Cr | ?Ni | ?Mo | ??V | ??P | ??S | ||||
| 1 | Embodiment | 3.64 | ??2.20 | ??0.44 | ?5.18 | ?4.68 | ?0.00 | ??0.00 | ??0.08 | ??0.01 | Martensite miniaturization tissue at the bottom of the pearlitic matrix | ??67 |
| 2 | Embodiment | 3.68 | ??2.04 | ??0.35 | ?4.02 | ?4.43 | ?0.00 | ??0.00 | ??0.28 | ??0.01 | Martensite miniaturization tissue at the bottom of the pearlitic matrix | ??65 |
| 3 | Embodiment | 3.61 | ??2.50 | ??0.35 | ?4.95 | ?4.49 | ?0.00 | ??0.00 | ??0.29 | ??0.01 | Martensite miniaturization tissue at the bottom of the pearlitic matrix | ??66 |
| 3-1 | Embodiment | 3.40 | ??2.00 | ??0.30～ ??0.80 | ?3.00 | ?4.50 | ?0.00 | ??0.00 | ??0.30 | ??0.01 | Martensite miniaturization tissue at the bottom of the pearlitic matrix | ??63 |
| 4 | Comparative example | 3.30 | ??2.15 | ??0.79 | ?1.02 | ?0.00 | ?2.30 | ??1.40 | ??0.00 | ??0.01 | Martensite cold quenching tissue at the bottom of the pearlitic matrix | ??64 |
| 5 | Comparative example | 3.10 | ??2.25 | ??0.79 | ?0.54 | ?0.00 | ?0.00 | ??0.00 | ??0.00 | ??0.00 | Martensite cold quenching tissue at the bottom of the pearlitic matrix | ??47 |
| 6 | Comparative example | 2.90～ 3.80 | ??0.70～ ??1.40 | ??0.30～ ??0.80 | ?15.0～ ?18.0 | 1.00 below | ?2.00～ ?4.00 | 2.00 below | ??0.00 | ??0.00 | Martensite cold quenching tissue at the bottom of the pearlitic matrix | ??60 |
| 7 | Comparative example | 3.00～ 3.60 | ??0.40～ ??1.00 | ??0.30～ ??0.90 | ?1.20～ ?1.70 | ?3.50～ ?4.30 | 0.40 below | ??0.30～ ??0.90 | 0.30 below | 0.10 below | Martensite cold quenching tissue at the bottom of the pearlitic matrix | 57～ ??64 |
| 8 | Comparative example | 3.15～ 3.35 | ??1.00～ ??1.20 | ??0.30～ ??0.80 | ?1.40～ ?2.50 | ?3.30～ ?3.80 | ?0.00 | ??0.00 | 0.30 below | 0.15 below | Martensite cold quenching tissue at the bottom of the pearlitic matrix | ??56 |
| 9 | Comparative example | 2.90～ 3.80 | ??2.00～ ??2.50 | 0.80 below | 0.20 below | ?4.00～ ?5.00 | ?0.00 | ??0.00 | ??0.10～ ??0.50 | 0.15 below | Martensite cold quenching tissue at the bottom of the pearlitic matrix | ??60 |
Surplus is Fe in the composition tissue.
Estimate 1
Table 1 sample 1～9 is shown each become to be grouped into, cast iron metal structure and Rockwell hardness.The cast iron metal structure is to use metal microstructure sem observation cast iron materials surface and determines.
As known from Table 1, the one-tenth of the formation cast iron materials of the sample 1～3-1 of embodiments of the invention is grouped within the scope of the invention, and the surface structure of cast iron materials by pearlitic matrix at the bottom of in martensite substrate miniaturization tissue form, so surface hardness presents HRC67 respectively, 65,66,65 such high values.On the other hand, composition is organized comparative example sample 4～9 within the scope of the invention, and martensite substrate cold quenching tissue during the surface structure of its cast iron materials forms at the bottom of the pearlitic matrix is so surface hardness is respectively the such low values in HRC47～64.
The result can confirm thus, is controlled in the scope of the present invention by the one-tenth that constitutes cast iron is grouped into, and is preferably by forming the miniaturization tissue, can obtain the cast iron materials of high rigidity and wear resistant excellence.
Fig. 2 A, Fig. 2 B are respectively the figure of the surfaceness of the slipping plane abrasion state after expression sample 1 and the test of sample 6 abrasion performances, and Fig. 2 A is the figure of the surfaceness of expression sample 1, and Fig. 2 B is the figure of the surfaceness of expression sample 6.As seen from the figure, sample 1, sample 6 all are directly big with the abrasion that contain the outer circumferential side that cement contacts, but can confirm that sample 1 wear loss in sample 1 and the sample 6 is few, the abrasion resistance excellence.Therefore, be controlled in the scope of the present invention, preferably structure of cast iron formed miniaturization tissue, the cast iron materials that can obtain having high rigidity and wear resistant excellence by the one-tenth that constitutes cast iron is grouped into.
Fig. 3 A, Fig. 3 B are respectively the figure of the internal side diameter amount of movement of the seal strip after the abrasion performance of expression sample 1 and sample 6 is tested, and Fig. 3 A is the figure of the internal side diameter amount of movement of expression sample 1, and Fig. 3 B is the figure of the internal side diameter amount of movement of expression sample 6.Can be confirmed by figure, no matter be fixation side or rotation side, all be that the internal side diameter amount of movement of sample 1 is little in sample 1 and the sample 6.The internal side diameter amount of movement of sample 1 fixation side be 0.28mm, the rotation side be 0.86mm, the internal side diameter amount of movement of sample 6 fixation side be 0.44mm, the rotation side be 1.28mm.Therefore can confirm, be controlled in the scope of the present invention, just can reduce the internal side diameter amount of movement of seal strip, so cast iron materials of the present invention is suitable as the cast iron materials that fluctuate hermetical ring is used very much by the one-tenth that constitutes cast iron is grouped into.
Carry out the results verification of corrosion test, the corrosion ratio of the sample 1 of embodiment is 7%, and the corrosion ratio of the sample 6,9 of comparative example is respectively 9%, 13%, so the sample 1 of embodiment has higher erosion resistance than the sample 6 that contains the more chrome molybdenum cast iron of Cr.Therefore, the result can confirm thus, by the composition organizational controls that constitutes cast iron within the scope of the invention, compares with technology in the past, can obtain the cast iron materials of excellent corrosion resistance.
Claims (11)
1, a kind of cast iron materials, it is the cast iron materials that is made of the Fe of C, Si, Mn, Ni, Cr and surplus and unavoidable impurities, it is characterized in that, the content of above-mentioned C, Si, Mn, Ni and Cr is respectively with respect to above-mentioned cast iron materials integral body:
C:2.9～3.8 weight %;
Si:1.0～2.5 weight %;
Mn:0～0.8 weight %, but do not comprise 0;
Ni:3.5～5.0 weight %;
Cr:2.6～5.5 weight %.
2, cast iron materials as claimed in claim 1, its feature are that also P in the above-mentioned unavoidable impurities and the content of S with respect to above-mentioned cast iron materials integral body are:
Below the P:0.5 weight %,
Below the S:0.5 weight %.
3, cast iron materials as claimed in claim 1, its feature are that also the substrate tissue is to be selected from perlite, bainite and martensitic tissue or their mixed structure, and have the miniaturization tissue of being made up of the carbide of dendroid cementite and Cr.
4, cast iron materials as claimed in claim 3, its feature are that also above-mentioned substrate tissue is the mixed structure based on martensite.
5, cast iron materials as claimed in claim 4, its feature are that also above-mentioned substrate tissue is based on the perlite of martensite and martensitic mixed structure.
6, cast iron materials as claimed in claim 1, its feature are that also the hardness HRC of above-mentioned cast iron materials is more than 62.
7, sealing material is characterized in that, is made of the described cast iron materials of claim 1.
8, sealing material as claimed in claim 7, its feature also is, the substrate tissue of the slipping plane of above-mentioned sealing material is to be selected from perlite, bainite and martensitic tissue or their mixed structure, and forms the tissue that contains the miniaturization tissue of being made up of the carbide of dendroid cementite and Cr.
9, fluctuate hermetical ring is characterized in that, is made of the described sealing material of claim 7.
10, fluctuate hermetical ring as claimed in claim 9, its feature also is, the substrate tissue of the slipping plane of above-mentioned fluctuate hermetical ring is to be selected from perlite, bainite and martensitic tissue or their mixed structure, and forms the tissue that contains the miniaturization tissue of being made up of the carbide of dendroid cementite and Cr.
11, a kind of manufacture method of sealing material, it is to have the manufacture method of sealing material that the metal liquid-bath that Fe and unavoidable impurities by C, Si, Mn, Ni, Cr and surplus are constituted is poured in the mold, carries out the operation of cooling curing again, it is characterized in that the content of above-mentioned C, Si, Mn, Ni and Cr is respectively with respect to above-mentioned metal liquid-bath integral body:
C:2.9～3.8 weight %;
Si:1.0～2.5 weight %;
Mn:0～0.8 weight %, but do not comprise 0;
Ni:3.5～5.0 weight %;
Cr:2.6～5.5 weight %,
In cooling curing, the speed of cooling of the sliding surface position of above-mentioned sealing material is faster than other parts.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004047908 | 2004-02-24 | ||
| JP2004047908A JP4357318B2 (en) | 2004-02-24 | 2004-02-24 | Cast iron material, sealing material and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1661125A true CN1661125A (en) | 2005-08-31 |
| CN100465319C CN100465319C (en) | 2009-03-04 |
Family
ID=34858188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100528564A Active CN100465319C (en) | 2004-02-24 | 2005-02-23 | Cast iron material, seal material and the production method |
Country Status (3)
| Country | Link |
|---|---|
| US (2) | US20050183794A1 (en) |
| JP (1) | JP4357318B2 (en) |
| CN (1) | CN100465319C (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103946610A (en) * | 2012-08-13 | 2014-07-23 | 株式会社小松制作所 | Floating seal |
| CN103946609A (en) * | 2012-08-13 | 2014-07-23 | 株式会社小松制作所 | Floating seal |
| CN104728444A (en) * | 2014-11-21 | 2015-06-24 | 武汉盛普林斯陶瓷有限公司 | Floating seal ring with composite working face |
| CN104981637A (en) * | 2012-12-20 | 2015-10-14 | 卡特彼勒公司 | Seal ring with frictional load surface |
| CN106676249A (en) * | 2016-12-12 | 2017-05-17 | 广西大学 | Heat treatment method for cast iron grinding ball and grinding sheet guiding plate |
| CN106756460A (en) * | 2016-12-12 | 2017-05-31 | 广西大学 | A kind of cast-iron grinding ball, grinding guide plate and preparation method thereof |
| CN110382933A (en) * | 2017-05-29 | 2019-10-25 | 日立建机株式会社 | Mechanically-sealing apparatus |
| CN116356197A (en) * | 2023-03-17 | 2023-06-30 | 烟台源农密封科技有限公司 | High-wear-resistance high-chromium cast iron fine-grain material, and preparation method and application thereof |
| CN117505822A (en) * | 2024-01-08 | 2024-02-06 | 江苏翔宇索具有限公司 | Cooling device for manufacturing metal material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITMI20070147A1 (en) * | 2007-01-30 | 2008-07-31 | Berco Spa | SEALING SYSTEM FOR TRACKING JOINT |
| KR101091839B1 (en) * | 2009-03-10 | 2011-12-12 | 캐터필라정밀씰 주식회사 | Alloy iron cast for seal, seal and manufacturing method for seal |
| US11421171B2 (en) | 2018-12-20 | 2022-08-23 | New Japan Chemical Co., Ltd. | Lubricating base oil for fluid dynamic bearing |
| CN110566671B (en) * | 2019-09-25 | 2024-04-30 | 湖北金稽山机械科技有限公司 | Mineral framework cementing wear-resistant body floating sealing pair and preparation method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2662011A (en) * | 1951-08-20 | 1953-12-08 | Int Nickel Co | Abrasion and corrosion resistant white cast iron |
| US4517726A (en) * | 1980-04-17 | 1985-05-21 | Naohiko Yokoshima | Method of producing seal ring |
| JPH0679435A (en) * | 1992-09-01 | 1994-03-22 | Eagle Ind Co Ltd | Production of bit for excavation |
| JP3205745B2 (en) * | 1993-03-31 | 2001-09-04 | 日立金属株式会社 | Abrasion resistant seizure resistant hot roll |
| JP3382326B2 (en) * | 1993-12-10 | 2003-03-04 | 本田技研工業株式会社 | Cast iron sliding member |
-
2004
- 2004-02-24 JP JP2004047908A patent/JP4357318B2/en not_active Expired - Lifetime
-
2005
- 2005-02-23 CN CNB2005100528564A patent/CN100465319C/en active Active
- 2005-02-23 US US11/062,868 patent/US20050183794A1/en not_active Abandoned
-
2008
- 2008-03-19 US US12/076,474 patent/US20080175741A1/en not_active Abandoned
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103946610A (en) * | 2012-08-13 | 2014-07-23 | 株式会社小松制作所 | Floating seal |
| CN103946609A (en) * | 2012-08-13 | 2014-07-23 | 株式会社小松制作所 | Floating seal |
| CN104981637A (en) * | 2012-12-20 | 2015-10-14 | 卡特彼勒公司 | Seal ring with frictional load surface |
| CN104728444A (en) * | 2014-11-21 | 2015-06-24 | 武汉盛普林斯陶瓷有限公司 | Floating seal ring with composite working face |
| CN106676249A (en) * | 2016-12-12 | 2017-05-17 | 广西大学 | Heat treatment method for cast iron grinding ball and grinding sheet guiding plate |
| CN106756460A (en) * | 2016-12-12 | 2017-05-31 | 广西大学 | A kind of cast-iron grinding ball, grinding guide plate and preparation method thereof |
| CN110382933A (en) * | 2017-05-29 | 2019-10-25 | 日立建机株式会社 | Mechanically-sealing apparatus |
| CN110382933B (en) * | 2017-05-29 | 2021-09-14 | 日立建机株式会社 | Mechanical sealing device |
| CN116356197A (en) * | 2023-03-17 | 2023-06-30 | 烟台源农密封科技有限公司 | High-wear-resistance high-chromium cast iron fine-grain material, and preparation method and application thereof |
| CN117505822A (en) * | 2024-01-08 | 2024-02-06 | 江苏翔宇索具有限公司 | Cooling device for manufacturing metal material |
| CN117505822B (en) * | 2024-01-08 | 2024-04-02 | 江苏翔宇索具有限公司 | Cooling device for manufacturing metal material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005240065A (en) | 2005-09-08 |
| JP4357318B2 (en) | 2009-11-04 |
| US20050183794A1 (en) | 2005-08-25 |
| CN100465319C (en) | 2009-03-04 |
| US20080175741A1 (en) | 2008-07-24 |
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