CN207577399U - A kind of casting system of the spheroidal graphite cast-iron reel of low-temperature-resistance high-toughness - Google Patents

Abstract

The utility model discloses a kind of casting system of the spheroidal graphite cast-iron reel of low-temperature-resistance high-toughness, including reel apperance, powdered post inoculant, running channel apperance, upper open top container, upper stalk, vaccum suction tube, drystone sand, can be closed the second chest and open-top receptacle for containing molten iron；The spheroidal graphite cast-iron reel of the casting system output can under 60 DEG C to 40 DEG C cryogenic conditions normal use, have important practical significance to the engineering construction and economic development of extremely frigid zones and application value.

Description

A kind of casting system of the spheroidal graphite cast-iron reel of low-temperature-resistance high-toughness

Technical field

The utility model is related to technical field of engineering equipment, are rolled up more particularly, to a kind of spheroidal graphite cast-iron of low-temperature-resistance high-toughness The casting system of cylinder.

Background technology

Reel is one of critical component of large lifting equipment, churning driven and hoisting speed reducer, due to the steel wire rope of load-bearing It is directly wound on reel, reel directly bears sling load, and quality good or not is to lifting equipment, churning driven and hoisting speed reducer Safe operation have vital influence.Maximize with the developing trend of modern project, construction machinery industry it is large-scale or The application of super large heavy-duty hoisting equipment, drilling device and hoisting speed reducer is more and more extensive, and the weight and lift of lifting are significantly Increase.Such as：The hoisting weight of super large heavy-duty hoisting equipment has reached a few kiloton；The lift of ultra-large type hoist engine has reached hundreds of Rice.Therefore, higher requirement is proposed to material of reel and preparation method thereof.

With China northeast, Inner Mongol and Xinjiang and the heavy construction item of Russia, North America and Northern Europe various countries extremely frigid zones Purpose development ＆ construction, the demand to low temperature large-scale engineering machinery is increasingly urgent in the world.

Since the low-temperature impact toughness of common spheroidal graphite cast-iron reel is relatively low, it is prone to brittle fracture under cryogenic, The technical property requirements of low temperature environment can not be met.The large lifting equipment to work under low temperature environment is low temperature resistant there is an urgent need to use High-tenacity nodular cast iron reel.The crane and hoisting speed reducer to work at low ambient temperatures must select low-temperature-resistance high-toughness ball Black cast iron reel ensures that its is reliable and safe to use with this.

Therefore, how to provide it is a kind of can under -60 DEG C to -40 DEG C cryogenic conditions normal use spheroidal graphite cast-iron reel, The technical issues of conducive to engineering construction and the economic development of extremely frigid zones being current those skilled in the art's urgent need to resolve.

Utility model content

The purpose of this utility model is to provide a kind of casting system of the spheroidal graphite cast-iron reel of low-temperature-resistance high-toughness, the casting System prepare spheroidal graphite cast-iron reel can under -60 DEG C to -40 DEG C cryogenic conditions normal use, the engineering of extremely frigid zones is built If having important practical significance with economic development and application value.

To solve the technical issues of above-mentioned, technical solution provided by the utility model is：

The casting system of the spheroidal graphite cast-iron reel of a kind of low-temperature-resistance high-toughness, including reel apperance, powdered secondary pregnant Educate agent, running channel apperance, upper open top container, upper stalk, vaccum suction tube, drystone sand, the second closed chest and for containing Fill the open-top receptacle of molten iron；

The reel apperance is foamed plastics material；

Powdered post inoculant mixes the reel apperance of solid foamed plastics material obtained after foaming in advance In；

The running channel apperance is foamed plastics material；

The running channel apperance is bonded on the bottom surface of the reel apperance, and the running channel apperance and the reel apperance Axial direction is mutually parallel with the apperance integral piece for obtaining including the reel apperance and running channel apperance；

Fireproof coating is coated on the outer surface of the apperance integral piece；

The apperance integral piece is positioned over vertical in the upper open top container；

The upper stalk is passed through and is fixed in the lower bottom of the upper open top container, the lower end of the running channel apperance and institute The upper end opening docking contact of stalk is stated, and the lower face of the running channel apperance is completely covered by the upper end of the upper stalk The junction of opening, the upper stalk and bottom under the upper open top container is sealed connection；

The vaccum suction tube is passed through and is fixed on the side box wall of the upper open top container, the inner end of the vaccum suction tube It is spaced apart with the apperance integral piece, sand control set, the vacuum suction are arranged on the inner end of the vaccum suction tube The outer end of pipe is exposed at the outside of the upper open top container and is connected with vacuum pump, the vaccum suction tube and the upper open top container side case The junction of wall is is tightly connected；

The residue other than the vaccum suction tube, apperance integral piece and upper stalk in the upper open top container is empty Between in be filled with the drystone sand；

Sealing is covered with plastic film on the upper surface of drystone sand in the upper open top container；

The drystone sand enriches on described in open top container to obtain casting mold by vibration molding compression；

The open-top receptacle is placed in the second closed chest, and the lower end of the upper stalk passes through second case The top case lid of son is immersed in the molten iron in the open-top receptacle, and the junction of the upper stalk and second chest is sealing Connection；

Be provided with the air inlet pipe for introducing compressed gas on the case lid of second chest, the outer end of the air inlet pipe with Compressed gas compressed air source unit connects.

The utility model has technique effect beneficial below：

1) in script sand casting, reel apperance mostly using wooden model, after making sand mold, will also take out wooden model, in order to take out Wooden model needs to do some special designs, such as：Sand mold is at least two layers so that the later stage takes out wooden model, and wooden model needs to make Pattern draft is to facilitate the later stage to take out wooden model, etc., after casting and forming, also to machine the pattern draft on removal casting, take When it is laborious, increase production cost, reduce production efficiency, for this purpose, the utility model use foam plastics mould, due to foam Plastics apperance is easy to gasify when the molten iron for touching high temperature, becomes gas and is taken away by vacuum pump, leave behind one with The similar sand mold cavity of reel structure shape, therefore, in the utility model, sand mold does not have to setting die joint, and entire sandbox is one Without pattern draft is set, core etc. at the hollow cavity of spool body is corresponded to without setting for a complete sandbox, Above-mentioned apperance integral piece is directly embedded in back-up sand, it is time saving and energy saving, cost is saved, improves efficiency.

2) melt fills type from top to bottom in original sand casting, and the gas in sand mold moves from the bottom up so that gas Hydraulic pressure is melt to live, be not easy from sand mold escape the problem of, cause serious volume gas and stomata problem in sand casting, for this purpose, this In utility model, it is placed in apperance integral piece is vertical in sand mold, and running channel apperance is bonded on the bottom surface of reel apperance so that Molten iron is to fill type from the bottom up, and apperance integral piece is to gasify from the bottom up, and the gas after gasification is also to move from the bottom up, three Direction be consistent, so as to avoid above-mentioned volume gas and stomata problem.

3) in traditional sand casting, melt is entirely to fill type by the gravity flowing of itself, it is easy to misrun, cold occurs Every, the shrinkage cavity and porosity the problems such as, for this purpose, the utility model, using the pressure of compressed gas and the suction force collective effect of vacuum Molten iron is filled into entire sand mold cavity, and before complete solidification, holding blows gas with vacuumizing so that molten iron is always with one Pressure fills sand mold cavity, and cools down therewith, significantly reduces misrun, cold shut, shrinkage cavity and porosity and other issues.

4) the post inoculant powder needed for nodular cast iron smelting is mixed in the foamed plastics material of reel by the application in advance In reel apperance, i.e., post inoculant powder is mixed in foamed plastics in advance, the curing molding temperature of foamed plastics is not high, generally At 200 DEG C hereinafter, the temperature will not cause high temperature scaling loss and high temperature oxygen to mixing each element in post inoculant therein Change, and in the drystone sand that the reel apperance of foamed plastics material is embedded in lost-foam casting method and vacuumize and pour Casting, so so that in entire casting cycle, each element all will not be with contacting external air in post inoculant, will not be high Warm oxidational losses, will not output oxidizing slag, so as to improve the utilization rate of post inoculant, improve late inoculation effect, carry The high comprehensive performance of spheroidal graphite cast-iron.

Description of the drawings

Fig. 1 is the casting system of the spheroidal graphite cast-iron reel of a kind of low-temperature-resistance high-toughness that the embodiment of the utility model provides Structure diagram；

Fig. 2 is the structure diagram of the reel apperance in Fig. 1.

In figure：1 reel apperance, 2 running channel apperances, 3 drystone sands, open top container on 4,5 plastic films, stalk on 6,7 is true Empty suction tube, 8 second chests, 9 open-top receptacles, 10 air inlet pipe.

Specific embodiment

Purpose, technical scheme and advantage to make the utility model embodiment are clearer, new below in conjunction with this practicality Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched The embodiment stated is the part of the embodiment of the utility model, instead of all the embodiments.Based on the reality in the utility model Apply example, those of ordinary skill in the art's all other embodiments obtained under the premise of creative work is not made, all Belong to the range of the utility model protection.

In the description of the present invention, it is to be appreciated that term " " center ", " axial direction ", " radial direction ", " longitudinal direction ", " horizontal stroke To ", " length ", " width ", " on ", " under ", "front", "rear", "left", "right", " top ", " bottom ", " interior ", " outer ", " clockwise ", The orientation or position relationship of instructions such as " counterclockwise " are based on orientation shown in the drawings or position relationship, are for only for ease of description The utility model and simplified description rather than instruction imply that signified device or element must be with specific orientation, Yi Te Fixed azimuth configuration and operation, therefore it is not intended that limitation to the utility model.

With reference to Fig. 1, Fig. 1 is the spheroidal graphite cast-iron reel of a kind of low-temperature-resistance high-toughness that the embodiment of the utility model provides The structure diagram of casting system；Fig. 2 is the structure diagram of the reel apperance in Fig. 1.

This application provides a kind of casting system of the spheroidal graphite cast-iron reel of low-temperature-resistance high-toughness, including reel apperance 1, powder The post inoculant of last shape, running channel apperance 2, upper open top container 4, upper stalk 6, vaccum suction tube 7, drystone sand 3, closed Two chests 8 and the open-top receptacle 9 for containing molten iron；

The reel apperance 1 is foamed plastics material；

Powdered post inoculant mixes the reel apperance 1 of solid foamed plastics material obtained after foaming in advance In；

The running channel apperance 2 is foamed plastics material；

The running channel apperance 2 is bonded on the bottom surface of the reel apperance 1, and the running channel apperance 2 and the reel mould The axial direction of sample 1 is mutually parallel with the apperance integral piece for obtaining including the reel apperance 1 and running channel apperance 2；

Fireproof coating is coated on the outer surface of the apperance integral piece；

The apperance integral piece is positioned over vertical in the upper open top container 4；

The upper stalk 6 is passed through and is fixed in the lower bottom of the upper open top container 4, the lower end of the running channel apperance 2 It is contacted with the upper end opening of the upper stalk 6, and the lower face of the running channel apperance 2 is completely covered by the upper stalk The junction of 6 upper end opening, the upper stalk 6 and described upper 4 times bottoms of open top container is sealed connection；

The vaccum suction tube 7 is passed through and is fixed on the side box wall of the upper open top container 4, the vaccum suction tube 7 Inner end and the apperance integral piece are spaced apart, and sand control set, the vacuum are arranged on the inner end of the vaccum suction tube The outer end of suction tube 7 is exposed at the outside of the upper open top container 4 and is connected with vacuum pump, the vaccum suction tube 7 with it is described spacious The junction of mouth 4 side box wall of case is is tightly connected；

It is surplus other than the vaccum suction tube 7, apperance integral piece and upper stalk 6 in the upper open top container 4 The drystone sand 3 is filled in complementary space；

Sealing is covered with plastic film 5 on the upper surface of drystone sand in the upper open top container 4；

The drystone sand 3 enriches on described in open top container 4 to obtain casting mold by vibration molding compression；

The open-top receptacle 9 is placed in the second closed chest 8, and the lower end of the upper stalk 6 passes through described the The top case lid of two chests 8 is immersed in the molten iron in the open-top receptacle 9, the connection of the upper stalk 6 and second chest 8 Locate to be tightly connected；

The air inlet pipe 10 for introducing compressed gas is provided on the case lid of second chest 8, the air inlet pipe 10 Outer end is connected with compressed gas compressed air source unit.

Present invention also provides a kind of preparation method of the spheroidal graphite cast-iron reel of above-mentioned low-temperature-resistance high-toughness, including following Step：

1) the reel apperance 1 of reel is produced using foamed plastics according to lost-foam casting method：Producing reel apperance 1 Powdered post inoculant is mixed in the process so that the reel apperance 1 of solid foamed plastics material obtained after foaming In contain equally distributed post inoculant powder；

The running channel apperance 2 of running channel is produced using foamed plastics；

Then the running channel apperance 2 is bonded on the bottom surface of the reel apperance 1, and control the running channel apperance 2 with The axial direction of the reel apperance 1 is mutually parallel, and obtains the apperance one for including the reel apperance 1 and running channel apperance 2 Part；

Then it is then dried in the outer surface coating refractory coating of apperance integral piece using dip coating manner；

Open top container 4 is taken, apperance integral piece is positioned in a manner of vertical in the upper open top container 4；

Then upper stalk 6 is set, the upper stalk 6 is passed through and is fixed in the lower bottom of the upper open top container 4, institute The lower end for stating running channel apperance 2 contacts, and the lower face of the running channel apperance 2 is complete with the upper end opening of the upper stalk 6 The upper end opening of upper stalk 6, seals the upper stalk 6 and the junction of described upper 4 times bottoms of open top container described in complete hiding；

Then vaccum suction tube 7 is set, the vaccum suction tube 7 passes through and is fixed on the side box wall of the upper open top container 4 On, the inner end of the vaccum suction tube 7 and the apperance integral piece are spaced apart, the outer end dew of the vaccum suction tube 7 It the outside of open top container 4 and is connected on described with vacuum pump, seals the vaccum suction tube 7 and upper 4 side box wall of open top container Junction；

Then drystone sand 3 is filled out into the upper open top container 4 according to lost-foam casting method, then vibration molding；

Then plastic covering film 5 is sealed on the upper surface of the casting mold according to lost-foam casting method in upper open top container 4；

2) it smelts：Smelting molten iron, when molten iron temperature reaches 1490 DEG C~1530 DEG C, stokehold adjustment hot metal composition causes iron Water includes the component of following weight percent：3.8%~4.0% C, 1.5%~2.5% Si, 0.2%~0.25% Mn, 0.015%~0.025% Ti, 0.10%~0.15% Ni, 0.002%~0.004% Mo, 0.002%~ 0.004% V, S ＜ 0.015%, P ＜ 0.03%, surplus are Fe and inevitable impurity；

After hot metal composition qualification, skim；

Then, 3min~5min is kept the temperature, molten iron is ready for and comes out of the stove；

Then spheroidising is carried out：Light rare earth magnesium nodulizer is placed in casting ladle bottom, covers long-acting silicon barium calcium thereon Inovulant pours method spheroidizing process using lid packet dam-type molten iron and carries out spheroidising to molten iron；

Then an inoculation is carried out：Long-acting silicon barium calcium zircaloy inovulant is added in into the molten iron after spheroidising, An inoculation is carried out, to eliminate the chilling tendency caused by tension-active element, graphite nodule is refined, delays decaying spheroidisation；

Then the molten iron open-top receptacle 9 obtained after an inoculation is contained；

3) open-top receptacle 9 in step 2) is placed in a second closed chest 8, and causes the upper stalk 6 lower end passes through the top case lid of second chest 8 to immerse in the molten iron in the open-top receptacle 9, seals the upper stalk 6 With the junction of second chest 8；

4) compressed gas is blowed into second chest 8 by air inlet pipe 10, while opens vacuum pump and extract vacuum, opened Molten iron in mouth container 9 is under the action of the pressure of compressed gas and the suction force of vacuum along upper 6 uplink of stalk, molten iron elder generation Running channel apperance 2 and reel apperance 1 are gasified afterwards, the gas after running channel apperance 2 gasifies with reel apperance 1 passes through vaccum suction tube 7 It is taken away by vacuum pump, molten iron fills type from the bottom up, until the liquid level in open-top receptacle 9, which no longer declines, shows that molten iron fills entire casting Then type cavity keeps blowing gas and vacuumizes certain time；

5) after design time is reached, stopping blows compressed gas and vacuumizes；

The upper stalk 6 from second chest 8 is extracted out after Shake-out Time is reached, is then dismantled described spacious Mouth case 4, then abolishes casting mold, obtains spheroidal graphite cast-iron reel semi-finished product；

6) the spheroidal graphite cast-iron reel semi-finished product obtained in step 5) are fitted into annealing furnace and carry out stress relief annealing process：It rises Temperature after keeping the temperature 4h~6h, is cooled to 200 DEG C~260 DEG C, comes out of the stove air-cooled to 500 DEG C~550 DEG C；It then will be after stress relief annealing Obtained spheroidal graphite cast-iron reel semi-finished product are machined out, and obtain spheroidal graphite cast-iron reel finished product after the completion.

The spheroidal graphite cast-iron reel of low-temperature-resistance high-toughness obtained above, is process by ductile cast iron material, spheroidal graphite used Cast iron includes the component of following weight percent：3.8%~4.0% C, 1.5%~2.5% Si, 0.2%~0.25% Mn, 0.015%~0.025% Ti, 0.10%~0.15% Ni, 0.002%~0.004% Mo, 0.002%~ 0.004% V, S ＜ 0.015%, P ＜ 0.03%, 0.03%~0.05% Mg, 0.02%~0.03% Re, 0.0015%~0.0100% Ca, 0.0015%~0.0100% Ba, 0.0008%~0.0020% Bi, 0.0025% ~0.0045% Zr, surplus are Fe and inevitable impurity.

In one embodiment of the application, in step 2), the light rare earth magnesium nodulizer includes following weight hundred The component of score：Mg：3%~4%, Re：2%~2.5%, Si：25%~35%, surplus for iron and inevitably it is miscellaneous Matter；The addition of light rare earth magnesium nodulizer is the 1.0%~1.2% of molten iron gross mass, and spheroidization treatment temperature is 1490 DEG C ~1520 DEG C；

And in step 2), long-acting silicon barium calcium inovulant includes the component of following weight percent：Si：40%~50%, Ba： 0.5%~0.7%, Ca：0.6%~1.0%, remaining is iron and inevitable impurity；Long-acting silicon barium calcium inovulant adds Enter 0.3%~0.4% that amount is molten iron gross mass.

In one embodiment of the application, in step 2), the long-acting silicon barium calcium zircaloy inovulant includes following heavy Measure the component of percentage：Si：40%~50%, Ba：0.5%~0.7%, Ca：0.6%~1.0%, Zr：0.5%~0.8%, Remaining is iron and inevitable impurity；The addition of long-acting silicon barium calcium zircaloy inovulant is the 0.5% of molten iron gross mass ~0.6%.

In one embodiment of the application, in step 1), post inoculant includes the component of following weight percent： Si：40%~50%, Ba：0.5%~0.7%, Ca：0.6%~1.0%, Bi：0.8%~1.0%, Re：0.1%~ 0.3%, remaining is iron and inevitable impurity；The addition of post inoculant for molten iron gross mass 0.1%~ 0.15%.

The explanation of above example is only intended to the method and its core concept that help understands the utility model.It should refer to Go out, it for those skilled in the art, can also be to this under the premise of the utility model principle is not departed from Some improvement and modification can also be carried out for utility model, these improvement and modification also fall into the protection domain of the utility model claims It is interior.

Claims (1)

1. the casting system of the spheroidal graphite cast-iron reel of a kind of low-temperature-resistance high-toughness, which is characterized in that including reel apperance, powdered Post inoculant, running channel apperance, upper open top container, upper stalk, vaccum suction tube, drystone sand, the second closed chest with And the open-top receptacle for containing molten iron；

The reel apperance is foamed plastics material；

Powdered post inoculant is mixed in advance in the reel apperance of solid foamed plastics material obtained after foaming；

The running channel apperance is foamed plastics material；

The running channel apperance is bonded on the bottom surface of the reel apperance, and the axial direction of the running channel apperance and the reel apperance Direction is mutually parallel with the apperance integral piece for obtaining including the reel apperance and running channel apperance；

Fireproof coating is coated on the outer surface of the apperance integral piece；

The apperance integral piece is positioned over vertical in the upper open top container；

The upper stalk is passed through and is fixed in the lower bottom of the upper open top container, the lower end of the running channel apperance with it is described on The upper end opening docking contact of stalk, and the lower face of the running channel apperance is completely covered by the upper end of the upper stalk and opens Mouthful, the junction of the upper stalk and bottom under the upper open top container is sealed connection；

The vaccum suction tube is passed through and is fixed on the side box wall of the upper open top container, the inner end of the vaccum suction tube and institute It states that apperance integral piece is spaced apart, sand control set is arranged on the inner end of the vaccum suction tube, the vaccum suction tube Outer end is exposed at the outside of the upper open top container and is connected with vacuum pump, the vaccum suction tube and the upper open top container side box wall Junction is is tightly connected；

In the remaining space other than the vaccum suction tube, apperance integral piece and upper stalk in the upper open top container It is filled with the drystone sand；

Sealing is covered with plastic film on the upper surface of drystone sand in the upper open top container；

The drystone sand enriches on described in open top container to obtain casting mold by vibration molding compression；

The open-top receptacle is placed in the second closed chest, and the lower end of the upper stalk passes through second chest Top case lid is immersed in the molten iron in the open-top receptacle, and the junction of the upper stalk and second chest connects for sealing It connects；

Be provided with the air inlet pipe for introducing compressed gas on the case lid of second chest, the outer end of the air inlet pipe with it is with pressure Gas source device connects.