CN113909437A - Casting process of tough ductile iron traction sheave - Google Patents
Casting process of tough ductile iron traction sheave Download PDFInfo
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- CN113909437A CN113909437A CN202111165062.4A CN202111165062A CN113909437A CN 113909437 A CN113909437 A CN 113909437A CN 202111165062 A CN202111165062 A CN 202111165062A CN 113909437 A CN113909437 A CN 113909437A
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- 238000005266 casting Methods 0.000 title claims abstract description 59
- 229910001141 Ductile iron Inorganic materials 0.000 title claims abstract description 50
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 88
- 229910052742 iron Inorganic materials 0.000 claims abstract description 44
- 238000003723 Smelting Methods 0.000 claims abstract description 30
- 239000004576 sand Substances 0.000 claims abstract description 16
- 239000002054 inoculum Substances 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000000465 moulding Methods 0.000 claims abstract description 4
- 238000007781 pre-processing Methods 0.000 claims abstract description 4
- 238000005507 spraying Methods 0.000 claims description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 17
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 17
- 229910052799 carbon Inorganic materials 0.000 claims description 17
- 229910052710 silicon Inorganic materials 0.000 claims description 17
- 239000010703 silicon Substances 0.000 claims description 17
- 238000011282 treatment Methods 0.000 claims description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 8
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 8
- 229910052787 antimony Inorganic materials 0.000 claims description 8
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 239000011777 magnesium Substances 0.000 claims description 8
- 229910052749 magnesium Inorganic materials 0.000 claims description 8
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 8
- 229910052750 molybdenum Inorganic materials 0.000 claims description 8
- 239000011733 molybdenum Substances 0.000 claims description 8
- 229910052698 phosphorus Inorganic materials 0.000 claims description 8
- 239000011574 phosphorus Substances 0.000 claims description 8
- 239000011593 sulfur Substances 0.000 claims description 8
- 229910052717 sulfur Inorganic materials 0.000 claims description 8
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000005011 phenolic resin Substances 0.000 claims description 6
- 229920001568 phenolic resin Polymers 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 5
- 238000005422 blasting Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 230000006698 induction Effects 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims 1
- 229920005989 resin Polymers 0.000 abstract description 5
- 239000011347 resin Substances 0.000 abstract description 5
- 230000003111 delayed effect Effects 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 16
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/28—Moulds for peculiarly-shaped castings for wheels, rolls, or rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D30/00—Cooling castings, not restricted to casting processes covered by a single main group
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/10—Making spheroidal graphite cast-iron
- C21C1/105—Nodularising additive agents
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/04—Cast-iron alloys containing spheroidal graphite
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
Abstract
The invention discloses a casting process of a tough ductile iron traction sheave, which comprises the following steps: s1, preparing a smelting furnace burden and proportioning the furnace burden; s2, putting the furnace burden to be smelted into the smelting furnace for smelting; s3, adding an inoculant and a nodulizer into molten iron obtained by smelting; s4, preparing a spherical iron traction sheave mold cavity; s5, casting and molding by using a casting mold; s6, cooling the cast initial ductile iron traction sheave; and S7, preprocessing the cooled initial ductile iron traction sheave. According to the casting process of the tough ductile iron traction sheave, the traction sheave die is prepared by using the high-strength low-gas-evolution precoated sand, so that the using amount of resin used for preparing the traction sheave die is greatly reduced, the gas evolution quantity is remarkably reduced, the gas evolution speed is delayed, and the quality of the traction sheave cast by the traction sheave die is better.
Description
Technical Field
The invention relates to the field of traction sheave casting, in particular to a casting process of a tough ductile iron traction sheave.
Background
The traction sheave is a rope sheave on a traction machine, also called a traction rope sheave or a driving rope sheave, is a device for transmitting traction power of an elevator, transmits power by utilizing the friction force of a traction steel wire rope and a rope groove on the edge of the traction sheave, is arranged on a worm wheel shaft in a speed reducer, and needs to bear all dynamic and static loads of a car, a load capacity, a counterweight and the like, so that the traction sheave is required to have high strength, good toughness, wear resistance and impact resistance, therefore, the material is made of the nodular cast iron, in order to reduce the wear of the traction steel wire rope in the rope groove of the traction sheave, besides selecting a proper rope groove, the reasonable requirements on the roughness and hardness of the working surface of the rope groove are required, the diameter of the traction sheave is more than 40 times of the diameter of the steel wire rope, in practice, generally 45-55 times and sometimes more than 60 times are required, and because the reduction ratio of the speed reducer is increased in order to reduce the traction volume and increase the diameter size of the speed reduction ratio, the integral traction wheel is divided into two parts, the middle part is a wheel cylinder, the outer part is made into a wheel ring type rope groove and cut on a wheel ring, the outer wheel ring is sleeved with an inner wheel cylinder and connected together into a traction wheel whole by a hinged bolt, the shaft of the traction wheel is a worm wheel shaft in a speed reducer, the traction force of the traction wheel driving an elevator to run is generated by the friction force between the traction rope and the rope groove of the traction wheel, the shape of the rope groove of the traction wheel is directly related to the size of the traction force and the service life of the traction rope, and the shape of the rope groove of the traction wheel is divided into: the casting process of the traction sheave comprises the steps of proportioning furnace burden, smelting, spheroidizing and inoculating, preparing a mould, pouring, cooling and pretreating;
however, the traction sheave casting process at the present stage has some disadvantages, for example, application No. 201910249815.6 discloses "elevator traction sheave casting process", the casting mold for casting the traction sheave is formed by gluing fine sand and stone through alkali phenolic resin, the fine sand stone is generally formed by quartz sand thermoplastic phenolic resin, urotropine and calcium stearate, no relevant additive is added, the resin addition is generally relatively high under a certain strength requirement, the resin does not have the characteristics of high temperature resistance, low expansion, low gas generation and the like, the method is suitable for producing some iron castings with low requirements and simpler structures, the traction sheave mold is prepared by using high-strength low-gas generation precoated sand, the high-strength low-gas generation precoated sand is based on the common fine sand stone, the resin consumption is greatly reduced by adding the additive with relevant characteristics and adopting a new preparation process, the gas generation is obviously reduced, the precoated sand has the characteristics of high strength, low expansion, low gas evolution, slow gas evolution and the like, and is particularly suitable for sand cores requiring low gas evolution in iron castings and medium and small steel castings, such as valve body sand cores and the like.
Disclosure of Invention
The invention mainly aims to provide a casting process of a tough ductile iron traction sheave, which can effectively solve the technical problems in the background technology.
In order to achieve the purpose, the invention adopts the technical scheme that:
the casting process of the tough ductile iron traction sheave comprises the following steps:
s1, preparing a smelting furnace burden and proportioning the furnace burden;
s2, putting the furnace burden to be smelted into the smelting furnace for smelting;
s3, adding an inoculant and a nodulizer into molten iron obtained by smelting;
s4, preparing a spherical iron traction sheave mold cavity;
s5, casting and molding by using a casting mold;
s6, cooling the cast initial ductile iron traction sheave;
s7, preprocessing the cooled initial ductile iron traction sheave;
and S8, spraying and storing the pretreated initial ductile iron traction sheave.
Preferably, in S1, the burden includes carbon, silicon, manganese, copper, molybdenum, antimony, phosphorus, sulfur, magnesium, and iron, and the percentage of each raw material is: 3.6 to 3.75 percent of carbon, 2.3 to 2.6 percent of silicon, 0.33 to 0.6 percent of manganese, 0.3 to 0.4 percent of copper, 0.26 to 0.34 percent of molybdenum, 0.026 to 0.033 percent of antimony, less than or equal to 0.05 percent of phosphorus, less than or equal to 0.03 percent of sulfur, 0.04 to 0.06 percent of magnesium, and the balance of iron and inevitable impurities.
Preferably, in S2, the furnace for smelting the burden is a medium frequency induction furnace, and the smelting temperature for smelting the burden is 1430-1550 ℃.
Preferably, in S3, the added inoculant amount is 0.8% to 1.3%, the added nodulizing agent amount is 1.1%, before the inoculant and nodulizing agent are added, the carbon and silicon content of the molten iron are detected, and the molten iron with the carbon content of 3.6% to 3.70% and the silicon content of 2.45% to 2.65% can be used for casting.
Preferably, in S4, the cavity of the ductile iron traction sheave mold comprises an upper casting mold box and a lower casting mold box, and the upper casting mold box and the lower casting mold box are both formed by bonding high-strength low-gas-generation precoated sand through an alkali phenolic resin adhesive.
Preferably, in S5, the molten iron is poured into the cavity of the ball iron traction sheave mold at a speed of 30 ± 5 seconds per box when the molten iron is cooled to 1360 to 1380 ℃.
Preferably, in S6, the time of the cold treatment is not less than 16 h.
Preferably, in S7, the pretreatment includes sand cleaning, heat treatment, abrasive cleaning, shot blasting and surface protection.
Preferably, in S8, the sprayed coating is a low-temperature iron-catching paint, the spraying time is within 6 hours after the pretreatment, the spraying frequency is three times, the time interval between the first spraying and the second spraying is 24 hours, the time interval between the second spraying and the third spraying is 8 hours, and during the third spraying, the ductile iron traction sheave is firstly dedusted.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the traction sheave mold is prepared by using the high-strength low-gas-evolution precoated sand, so that the resin consumption used in the preparation of the traction sheave mold is greatly reduced, the gas evolution quantity is remarkably reduced, and the gas evolution speed is delayed, so that the traction sheave molded by casting the traction sheave mold has better quality;
the pretreated ductile iron traction sheave can be better stored by spraying the pretreated ductile iron traction sheave.
Drawings
FIG. 1 is a flow chart of a casting process of a tough ductile iron traction sheave of the present invention;
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1, the casting process of the tough ductile iron traction sheave comprises the following steps:
s1, preparing a smelting furnace burden and proportioning the furnace burden;
s2, putting the furnace burden to be smelted into the smelting furnace for smelting;
s3, adding an inoculant and a nodulizer into molten iron obtained by smelting;
s4, preparing a spherical iron traction sheave mold cavity;
s5, casting and molding by using a casting mold;
s6, cooling the cast initial ductile iron traction sheave;
s7, preprocessing the cooled initial ductile iron traction sheave;
and S8, spraying and storing the pretreated initial ductile iron traction sheave.
S1, the furnace charge comprises carbon, silicon, manganese, copper, molybdenum, antimony, phosphorus, sulfur, magnesium and iron, and the percentage of each raw material is as follows: 3.6 to 3.75 percent of carbon, 2.3 to 2.6 percent of silicon, 0.33 to 0.6 percent of manganese, 0.3 to 0.4 percent of copper, 0.26 to 0.34 percent of molybdenum, 0.026 to 0.033 percent of antimony, less than or equal to 0.05 percent of phosphorus, less than or equal to 0.03 percent of sulfur, 0.04 to 0.06 percent of magnesium, and the balance of iron and inevitable impurities; s2, melting a furnace for melting the furnace burden by using a medium-frequency induction furnace, wherein the melting temperature of the furnace burden is 1430-1550 ℃; in S3, the added inoculant is 0.8-1.3%, the added nodulizing agent is 1.1%, before the inoculant and the nodulizing agent are added, the carbon and silicon contents of the molten iron are detected, and the molten iron with the carbon content of 3.6-3.70% and the silicon content of 2.45-2.65% can be used for casting; s4, enabling a mold cavity of the ductile iron traction sheave mold to comprise a casting mold upper box and a casting mold lower box, wherein the casting mold upper box and the casting mold lower box are both formed by bonding high-strength low-gas-generation coated sand through an alkali phenolic resin adhesive; in S5, when the molten iron is cooled to 1360-1380 ℃, the molten iron is poured into the cavity of the ductile iron traction sheave mold at the speed of 30 +/-5 seconds per box; in S6, the time of cold treatment is more than or equal to 16 h; in S7, the pretreatment comprises sand cleaning treatment, heat treatment, cleaning and grinding treatment, shot blasting treatment and surface protection treatment; in S8, the sprayed coating is iron catching low-temperature paint, the spraying time is within 6 hours after pretreatment, the spraying frequency is three times, the time interval between the first spraying and the second spraying is 24 hours, the time interval between the second spraying and the third spraying is 8 hours, and when the third spraying is carried out, the ball iron traction wheel is firstly subjected to dust removal.
The invention relates to a tough ductile iron traction sheave casting process, which comprises the following steps of firstly preparing and smelting furnace burden, and proportioning the furnace burden, wherein the furnace burden comprises carbon, silicon, manganese, copper, molybdenum, antimony, phosphorus, sulfur, magnesium and iron, and the percentage of each raw material is as follows: 3.6 to 3.75 percent of carbon, 2.3 to 2.6 percent of silicon, 0.33 to 0.6 percent of manganese, 0.3 to 0.4 percent of copper, 0.26 to 0.34 percent of molybdenum, 0.026 to 0.033 percent of antimony, less than or equal to 0.05 percent of phosphorus, less than or equal to 0.03 percent of sulfur, 0.04 to 0.06 percent of magnesium and the balance of iron and inevitable impurities, then putting the burden to be smelted into a smelting furnace for smelting, wherein the smelting furnace for smelting the burden is an intermediate frequency induction furnace for smelting, the smelting temperature of the burden is 1430 to 1550 ℃, adding an inoculant and a nodulizer into molten iron obtained after smelting is finished, the amount of the added inoculant is 0.8 to 1.3 percent, the amount of the added nodulizer is 1.1 percent, detecting the content of carbon and silicon in the molten iron before adding the inoculant and the nodulizer, and obtaining the molten iron with the carbon content of 3.6 to 3.70 percent and the silicon content of 2.45 to 2.65 percent, after the carbon content and the silicon content are detected, preparing a ductile iron traction sheave mold cavity, wherein the ductile iron traction sheave mold cavity comprises a casting mold upper box and a casting mold lower box, the casting mold upper box and the casting mold lower box are both formed by bonding precoated sand through high-strength low-gas-evolution alkali phenolic resin adhesive, after the casting of the ductile iron traction sheave mold cavity is finished, the ductile iron traction sheave is cast and molded through the ductile iron traction sheave mold by using a casting mold, when the molten iron is cooled to 1360-1380 ℃, the molten iron is cast into the ductile iron traction sheave mold cavity at the speed of 30 +/-5 seconds per box, the ductile iron traction sheave in the initial form is obtained after casting, at the moment, the cast initial ductile iron traction sheave is cooled, the cooling time is not less than 16h, so that the ductile iron traction sheave in the initial form is fully cooled, and the cooled initial ductile iron traction sheave is pretreated, the pretreatment comprises sand cleaning treatment, heat treatment, cleaning and grinding treatment, shot blasting treatment and surface protection treatment, the initial spherical iron traction wheel can be processed into a finished product by pretreating the spherical iron traction wheel, the spherical iron traction wheel is sprayed after pretreatment, the sprayed coating is iron-grabbing low-coat, the spraying time is within 6 hours after pretreatment, the spraying frequency is three times, the time interval between the first spraying and the second spraying is 24 hours, the time interval between the second spraying and the third spraying is 8 hours, and dust removal is carried out on the spherical iron traction wheel during the third spraying.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A casting process of a tough ductile iron traction sheave is characterized in that: the casting of the tough ductile iron traction sheave comprises the following steps:
s1, preparing a smelting furnace burden and proportioning the furnace burden;
s2, putting the furnace burden to be smelted into the smelting furnace for smelting;
s3, adding an inoculant and a nodulizer into molten iron obtained by smelting;
s4, preparing a spherical iron traction sheave mold cavity;
s5, casting and molding by using a casting mold;
s6, cooling the cast initial ductile iron traction sheave;
s7, preprocessing the cooled initial ductile iron traction sheave;
and S8, spraying and storing the pretreated initial ductile iron traction sheave.
2. The casting process of the ductile iron traction sheave according to claim 1, wherein: in the step S1, the furnace burden comprises carbon, silicon, manganese, copper, molybdenum, antimony, phosphorus, sulfur, magnesium and iron, and the furnace burden comprises the following raw materials in percentage by weight: 3.6 to 3.75 percent of carbon, 2.3 to 2.6 percent of silicon, 0.33 to 0.6 percent of manganese, 0.3 to 0.4 percent of copper, 0.26 to 0.34 percent of molybdenum, 0.026 to 0.033 percent of antimony, less than or equal to 0.05 percent of phosphorus, less than or equal to 0.03 percent of sulfur, 0.04 to 0.06 percent of magnesium, and the balance of iron and inevitable impurities.
3. The casting process of the ductile iron traction sheave according to claim 1, wherein: in S2, the furnace for smelting the furnace burden is a medium-frequency induction furnace, and the smelting temperature of the furnace burden is 1430-1550 ℃.
4. The casting process of the ductile iron traction sheave according to claim 1, wherein: in the S3, the added inoculant is 0.8-1.3%, the added nodulizing agent is 1.1%, before the inoculant and the nodulizing agent are added, the carbon and silicon contents of the molten iron are detected, and the molten iron with the carbon content of 3.6-3.70% and the silicon content of 2.45-2.65% can be used for pouring.
5. The casting process of the ductile iron traction sheave according to claim 1, wherein: in the S4, the mold cavity of the ductile iron traction sheave mold comprises a casting mold upper box and a casting mold lower box, and the casting mold upper box and the casting mold lower box are both formed by bonding high-strength low-gas-generation coated sand through alkali phenolic resin glue.
6. The casting process of the ductile iron traction sheave according to claim 1, wherein: in the step S5, when the molten iron is cooled to 1360-1380 ℃, the molten iron is poured into the cavity of the ductile iron traction sheave mold at a speed of 30 +/-5 seconds per box.
7. The casting process of the ductile iron traction sheave according to claim 1, wherein: in S6, the time of cold treatment is more than or equal to 16 h.
8. The casting process of the ductile iron traction sheave according to claim 1, wherein: in the step S7, the pretreatment comprises sand cleaning treatment, heat treatment, cleaning and grinding treatment, shot blasting treatment and surface protection treatment.
9. The casting process of the ductile iron traction sheave according to claim 1, wherein: in the step S8, the sprayed coating is iron catching low-temperature paint, the spraying time is within 6 hours after pretreatment, the spraying frequency is three times, the time interval between the first spraying and the second spraying is 24 hours, the time interval between the second spraying and the third spraying is 8 hours, and when the third spraying is carried out, the ball iron traction wheel is firstly subjected to dust removal.
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| CN202111165062.4A CN113909437A (en) | 2021-09-30 | 2021-09-30 | Casting process of tough ductile iron traction sheave |
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| CN202111165062.4A CN113909437A (en) | 2021-09-30 | 2021-09-30 | Casting process of tough ductile iron traction sheave |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445853A (en) * | 2007-11-28 | 2009-06-03 | 上海华新合金有限公司 | Method for casting elevator as-cast ball iron towing pulley |
| CN102310187A (en) * | 2011-09-13 | 2012-01-11 | 上海华新合金有限公司 | Elevator traction sheave casting method |
| CN103846391A (en) * | 2014-03-10 | 2014-06-11 | 长沙金龙铸造实业有限公司 | Production method of traction sheave of elevator |
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| CN105710290A (en) * | 2014-12-04 | 2016-06-29 | 中国核工业二四建设有限公司 | Radioactive waste well cast iron cover plate casting and anti-corrosion technology |
| CN108145076A (en) * | 2017-12-07 | 2018-06-12 | 杭州德曼汽车零部件有限公司 | The high dense alloy ball iron towing pulley casting method of high intensity |
| CN109943767A (en) * | 2019-03-29 | 2019-06-28 | 浙江欧冶达机械制造股份有限公司 | Elevator traction sheave casting technique |
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2021
- 2021-09-30 CN CN202111165062.4A patent/CN113909437A/en active Pending
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| CN101445853A (en) * | 2007-11-28 | 2009-06-03 | 上海华新合金有限公司 | Method for casting elevator as-cast ball iron towing pulley |
| CN102310187A (en) * | 2011-09-13 | 2012-01-11 | 上海华新合金有限公司 | Elevator traction sheave casting method |
| CN103846391A (en) * | 2014-03-10 | 2014-06-11 | 长沙金龙铸造实业有限公司 | Production method of traction sheave of elevator |
| CN103981434A (en) * | 2014-05-28 | 2014-08-13 | 河南理工大学 | Preparation method for high-toughness nodular cast iron |
| CN105710290A (en) * | 2014-12-04 | 2016-06-29 | 中国核工业二四建设有限公司 | Radioactive waste well cast iron cover plate casting and anti-corrosion technology |
| CN108145076A (en) * | 2017-12-07 | 2018-06-12 | 杭州德曼汽车零部件有限公司 | The high dense alloy ball iron towing pulley casting method of high intensity |
| CN109943767A (en) * | 2019-03-29 | 2019-06-28 | 浙江欧冶达机械制造股份有限公司 | Elevator traction sheave casting technique |
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Application publication date: 20220111 |