CN104195448B - Casting alloy material and the technique casting ocean platform canine tooth roller box foundry goods with it - Google Patents
Casting alloy material and the technique casting ocean platform canine tooth roller box foundry goods with it Download PDFInfo
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Abstract
The invention discloses a kind of casting alloy material and the technique casting ocean platform canine tooth roller box foundry goods with it, described alloy material is ZG32CrNiMo, casting ocean platform canine tooth roller box foundry goods with described G32CrNiMo, its processing step includes: a, phenolic sand molding；B, running gate system, rising head and chill are set；C, casting of molten metal；D, normalizing+tempering pretreatment；E: Tempering and Quenching.By the way, alloy material G32CrNiMo formula of the present invention is reasonable, the especially molten metal of melting has the feature of good fluidity, the foundry goods making as cast condition has good tensile strength and good ductility, simultaneously with the rational technology of its casting large-scale cartridge housing foundry goods, by bottom gating, rising head and the reasonable disposition of chill, making the foundry goods flawless of cast, yield rate is high.
Description
Technical field
The present invention relates to metal casting technique field, particularly relate to a kind of casting alloy material and the technique casting ocean platform canine tooth roller box foundry goods with it.
Background technology
The shrinkage factor of housing class foundry goods is affected by the many factors such as deformability in chemical composition, pouring temperature, the architectural feature of foundry goods own, the deformability of casting mold and the loam core of the molten metal of cast alloy materials melting, especially the chemical composition of molten metal, the impact of pouring temperature make to water same foundry goods is the most variant in the size of the most same heat of each heat.
Ocean platform canine tooth roller box foundry goods weighs 800kg, requirement mechanical performance reaches: yield strength >=600MPa, tensile strength >=740MPa, elongation >=17%, the contraction percentage of area >=35% ,-40 impact values >=34J, single minima 27J, hardness 210-234HBW, its Requirements of Nondestructive Testing is not allow for crackle, quenched after do not allow soldering.
Owing to the planform of this ocean platform canine tooth roller box is more complicated, wall thickness variation is big, so that foundry goods cooling degree of each several part in casting process is uneven, and easily produce shrinkage porosite and shrinkage cavity in wall thickness part, liquid metal filling it is easily generated again bad in thin-walled portion, therefore casting process easily causes the critical defects such as crackle, pore and sand holes so that the percentage of A-class goods of foundry goods is low；Simultaneously in order to eliminate casting stress, improving casting dimension accuracy and internal soundness, Technology for Heating Processing is the most crucial.
Summary of the invention
Present invention mainly solves technical problem is that: for the deficiencies in the prior art, a kind of casting alloy material and the technique casting ocean platform canine tooth roller box foundry goods with it are provided, this alloy material formula is reasonable, there is the feature of good fluidity, the foundry goods making as cast condition has good tensile strength and good ductility, cast the rational technology of ocean platform canine tooth roller box foundry goods with it simultaneously, by bottom gating, rising head and the reasonable disposition of chill, making the foundry goods flawless of cast, yield rate is high.
For solving above-mentioned technical problem, the technical scheme that the present invention uses is: provide a kind of casting alloy material, casting for heavy castings, described alloy material is ZG32CrNiMo, its composition and quality proportioning be: C:0.26-0.35%, Si:0.20-0.40%, Mn:0.90-1.10%, Cr:0.50-0.80%, Ni:0.70-0.90%, Mo:0.30-0.40%, P≤0.025%, S≤0.020%, remaining is Fe.
Casting ocean platform canine tooth roller box foundry goods with described ZG32CrNiMo, its casting and Technology for Heating Processing comprise the steps:
A, phenolic sand molding: with the Flange Plane of described ocean platform canine tooth roller box foundry goods as die joint, respectively constitute upper and lower involutory upper impression resin sand mould and lower impressions resin sand mould with phenolic sand molding；
B, running gate system, rising head and chill are set: described running gate system is bottom gating, and including the cup being mutually communicated, sprue, cross gate and 2 road ingates, described sprue, cross gate, the diameter of 2 road ingates are 60mm；The Flange Plane of the described ocean platform canine tooth roller box foundry goods of described upper impression resin sand mould arranges open riser, described open riser has 3, including 2 cylindrical open risers and 1 oval cylindricality open riser, the structure of wherein said 2 cylindrical open risers is identical, equal sized；Arranging contoured chill at the thermal center of the described ocean platform canine tooth roller box foundry goods of described lower impressions resin sand mould, described contoured chill has 2 pieces, symmetrical is placed at described thermal center；
C, casting of molten metal: pour into a mould the molten metal of described ZG32CrNiMo melting, the a diameter of 45mm of orifice, in casting process, pouring temperature is 1550 ± 10 DEG C, water molten metal described in weight 1200kg, described ocean platform canine tooth roller box foundry goods is i.e. obtained after casting complete, foundry goods is incubated 48 hours in sand mold, then sand removal gas cutting open riser；
D, normalizing+tempering pretreatment: described ocean platform canine tooth roller box foundry goods is put in normalizing furnace, normalizing is warming up to 620 ± 10 DEG C, it is incubated 2 hours, continue normalizing and be warming up to 900 ± 10 DEG C, it is incubated 4 hours, air cooling puts into tempering furnace to room temperature, and tempering is warming up to 620 ± 10 DEG C, and stove is cooled to 500 DEG C and comes out of the stove；
E: Tempering and Quenching: pretreated described ocean platform canine tooth roller box foundry goods is carried out preliminary working, then foundry goods is put into normalizing furnace, be warming up to 880 ± 10 DEG C, being incubated 6 hours, put into tempering furnace after quenching, tempering is warming up to 650 ± 10 DEG C, being incubated 8 hours, stove is cooled to 550 DEG C and comes out of the stove.
In a preferred embodiment of the present invention, the size of described 2 cylindrical open risers is: Φ 200mm × 300mm, and the size of described 1 oval cylindricality open riser is waist 200mm × 300mm.Structure according to ocean platform canine tooth roller box foundry goods and size arrange the open riser of Sizes, the volume that after having enough molten metals to supplement the liquid contraction of foundry goods and solidification feeding and cast in making open riser, die cavity expands.
In a preferred embodiment of the present invention, in described casting process, when metal bath surface rises to the 1/2-2/3 of described open riser height, adding heat preserving agent in each open riser described, each open riser adds heat preserving agent 2kg.Keep the time of liquid for extending molten metal in open riser, improve the feeding efficiency of open riser, and molten metal consumption can be saved, reduce casting cost.
In a preferred embodiment of the present invention, described gas cutting open riser temperature is not less than 150 DEG C.In order to avoid producing open riser root stress raisers and causing casting crack phenomenon.
In a preferred embodiment of the present invention, described quenching uses water quenching method.Low cost, need to strengthen the circulation of water during quenching, it is simple to cooling is uniformly.
In a preferred embodiment of the present invention, described normalizing, programming rate≤100 DEG C/h of tempering.Control programming rate, thermal effectiveness can be improved, eliminate the casting stress of foundry goods, stable dimensions and improve the mechanical performance of foundry goods.
The invention has the beneficial effects as follows: the ZG32CrNiMo casting alloy material of present invention formula voluntarily, formula is reasonable, the molten metal of this material melting have the feature of good fluidity, make the foundry goods of as cast condition have good tensile strength and good ductility；Casting the rational technology of ocean platform canine tooth roller box foundry goods with it simultaneously, by bottom gating, rising head and the reasonable disposition of chill, make the foundry goods flawless of cast, yield rate is high；In addition after moulding by casting, foundry goods, through normalizing, tempering pretreatment and Tempering and Quenching, can eliminate casting stress, improves casting dimension accuracy and inherent quality.
Accompanying drawing explanation
Fig. 1 is the technique main TV structure schematic diagram casting ocean platform canine tooth roller box foundry goods with ZG32CrNiMo；
Fig. 2 is plan structure schematic diagram shown in Fig. 1；
In accompanying drawing, the labelling of each parts is as follows: 1, Flange Plane, and 2, open riser, 3, contoured chill, 4, cup, 5, sprue, 6, cross gate, 7, ingate.
Detailed description of the invention
Below in conjunction with the accompanying drawings presently preferred embodiments of the present invention is described in detail, so that advantages and features of the invention can be easier to be readily appreciated by one skilled in the art, thus protection scope of the present invention is made apparent clear and definite defining.
Referring to Fig. 1 and Fig. 2, the embodiment of the present invention includes:
A kind of casting alloy material, casting for heavy castings, described alloy material is ZG32CrNiMo, its composition and quality proportioning be:: C:0.26-0.35%, Si:0.20-0.40%, Mn:0.90-1.10%, Cr:0.50-0.80%, Ni:0.70-0.90%, Mo:0.30-0.40%, P≤0.025%, S≤0.020%, remaining is Fe.The molten metal of this alloy material melting has the feature of good fluidity, makes the foundry goods of as cast condition have good tensile strength and ductility.
Casting ocean platform canine tooth roller box foundry goods with described ZG32CrNiMo, its casting and Technology for Heating Processing comprise the steps:
A, phenolic sand molding: with the Flange Plane 1 of described ocean platform canine tooth roller box foundry goods as die joint, respectively constitute upper and lower involutory upper impression resin sand mould and lower impressions resin sand mould with phenolic sand molding；
B, running gate system, rising head and chill are set: described running gate system is bottom gating, and including the cup 4 being mutually communicated, sprue 5, cross gate 6 and 2 road ingate 7, described sprue 5, the diameter of cross gate 6,2 road ingate 7 are 60mm；The Flange Plane 1 of the described ocean platform canine tooth roller box foundry goods of described upper impression resin sand mould arranges open riser 2, described open riser 2 has 3, including 2 a size of: the cylindrical open riser of Φ 200mm × 300mm and 1 a size of: the oval cylindricality open riser of waist 200mm × 300mm；Arranging contoured chill 3 at the thermal center of the described ocean platform canine tooth roller box foundry goods of described lower impressions resin sand mould, described contoured chill 3 has 2 pieces, and its thickness is 50mm, symmetrical is placed at described thermal center；By bottom gating, open riser 2 and contoured chill 3 reasonable coordination, control the solidification order of foundry goods, crystal grain thinning tissue, prevent foundry goods from crackle occurring；
C, casting of molten metal: pour into a mould the molten metal of described ZG32CrNiMo melting, the a diameter of 45mm of orifice, in casting process, pouring temperature is 1550 ± 10 DEG C, water molten metal described in weight 1200kg, i.e. obtain described ocean platform canine tooth roller box foundry goods after casting complete, foundry goods is incubated 48 hours in sand mold, then sand removal gas cutting open riser 2, and the temperature of air bound open riser 2 is not less than 150 DEG C, in order to avoid producing open riser 2 root stress raisers and causing casting crack phenomenon；
Wherein, in described casting process, when metal bath surface rises to the 1/2-2/3 of described open riser 2 height, adding heat preserving agent in each open riser 2 described, each open riser 2 adds heat preserving agent 2kg.Keep the time of liquid for extending molten metal in open riser 2, improve the feeding efficiency of open riser 2, and molten metal consumption can be saved, reduce casting cost；
D, normalizing+tempering pretreatment: described ocean platform canine tooth roller box foundry goods is put in normalizing furnace, normalizing is warming up to 620 ± 10 DEG C, it is incubated 2 hours, continue normalizing and be warming up to 900 ± 10 DEG C, it is incubated 4 hours, air cooling puts into tempering furnace to room temperature, and tempering is warming up to 620 ± 10 DEG C, and stove is cooled to 500 DEG C and comes out of the stove；
E: Tempering and Quenching: pretreated described ocean platform canine tooth roller box foundry goods is carried out preliminary working, then foundry goods is put into normalizing furnace, be warming up to 880 ± 10 DEG C, being incubated 6 hours, put into tempering furnace after quenching, tempering is warming up to 650 ± 10 DEG C, being incubated 8 hours, stove is cooled to 550 DEG C and comes out of the stove.
Wherein, described quenching uses water quenching method, low cost, need to strengthen the circulation of water during quenching, it is simple to cooling is uniformly.
Described normalizing, programming rate≤100 DEG C/h of tempering, control programming rate, can improve thermal effectiveness, eliminates the casting stress of foundry goods, stable dimensions and improves the mechanical performance of foundry goods.
Embodiment one:
Being formulated for casting the ZG32CrNiMo alloy material of ocean platform canine tooth roller box foundry goods, its composition and quality proportioning be: C:0.26%, Si:0.40%, Mn:0.90%
, Cr:0.50%
, Ni:0.80%
, Mo:0.30%, P:0.015%, S:0.02%, Fe:96.805%.
With above-mentioned formulated ZG32CrNiMo alloy material casting ocean platform canine tooth roller box foundry goods, its casting and Technology for Heating Processing comprise the steps:
A, the ZG32CrNiMo alloy material above-mentioned preparation obtained are smelted into molten metal；
B, carry out phenolic sand molding as stated above, bottom gating, open riser and contoured chill are set, cast 1200kg molten metal, pouring temperature is 1550 DEG C, after casting complete, foundry goods is incubated 48 hours in sand mold, then sand removal gas cutting open riser, the temperature of gas cutting open riser is 150 DEG C, the ocean platform canine tooth roller box foundry goods gross weight 800kg of cast；
C, putting in normalizing furnace by above-mentioned prepared ocean platform canine tooth roller box foundry goods, normalizing is warming up to 620 DEG C, is incubated 2 hours, continues normalizing and is warming up to 890 DEG C, be incubated 4 hours, put into tempering furnace after air cooling to room temperature, is tempered and is warming up to 610 DEG C, and stove is cooled to 500 DEG C and comes out of the stove；
D, above-mentioned pretreated ocean platform canine tooth roller box foundry goods is carried out preliminary working, then described ocean platform canine tooth roller box foundry goods is put into normalizing furnace, be warming up to 870 DEG C, being incubated 6 hours, put into tempering furnace after quenching, tempering is warming up to 640 DEG C, being incubated 8 hours, stove is cooled to 550 DEG C and comes out of the stove.
Embodiment two:
Being formulated for casting the ZG32CrNiMo alloy material of ocean platform canine tooth roller box foundry goods, its composition and quality proportioning be: C:0.35%, Si:0.20%, Mn:1.00%
, Cr:0.80%
, Ni:0.70%
, Mo:0.38%, P:0.01%, S:0.01%, Fe:96.55%.
With above-mentioned formulated ZG32CrNiMo alloy material casting ocean platform canine tooth roller box foundry goods, its casting and Technology for Heating Processing comprise the steps:
A, the ZG32CrNiMo alloy material above-mentioned preparation obtained are smelted into molten metal；
B, carry out phenolic sand molding as stated above, bottom gating, open riser and contoured chill are set, cast 1200kg molten metal, pouring temperature is 1540 DEG C, after casting complete, foundry goods is incubated 48 hours in sand mold, then sand removal gas cutting open riser, the temperature of gas cutting open riser is 160 DEG C, the ocean platform canine tooth roller box foundry goods gross weight 800kg of cast；
C, putting in normalizing furnace by above-mentioned prepared ocean platform canine tooth roller box foundry goods, normalizing is warming up to 610 DEG C, is incubated 2 hours, continues normalizing and is warming up to 900 DEG C, be incubated 4 hours, put into tempering furnace after air cooling to room temperature, is tempered and is warming up to 620 DEG C, and stove is cooled to 500 DEG C and comes out of the stove；
D, above-mentioned pretreated ocean platform canine tooth roller box foundry goods is carried out preliminary working, then described ocean platform canine tooth roller box foundry goods is put into normalizing furnace, be warming up to 880 DEG C, being incubated 6 hours, put into tempering furnace after quenching, tempering is warming up to 660 DEG C, being incubated 8 hours, stove is cooled to 550 DEG C and comes out of the stove.
Embodiment three:
Being formulated for casting the ZG32CrNiMo alloy material of ocean platform canine tooth roller box foundry goods, its composition and quality proportioning be: C:0.32%, Si:0.40%, Mn:0.90%
, Cr:0.70%
, Ni:0.70%
, Mo:0.34%, P:0.025%, S:0.01%, Fe:96.605%.
With above-mentioned formulated ZG32CrNiMo alloy material casting ocean platform canine tooth roller box foundry goods, its casting and Technology for Heating Processing comprise the steps:
A, the ZG32CrNiMo alloy material above-mentioned preparation obtained are smelted into molten metal；
B, carry out phenolic sand molding as stated above, bottom gating, open riser and contoured chill are set, cast 1200kg molten metal, pouring temperature is 1560 DEG C, after casting complete, foundry goods is incubated 48 hours in sand mold, then sand removal gas cutting open riser, the temperature of gas cutting open riser is 160 DEG C, the ocean platform canine tooth roller box foundry goods gross weight 800kg of cast；
C, putting in normalizing furnace by above-mentioned prepared ocean platform canine tooth roller box foundry goods, normalizing is warming up to 630 DEG C, is incubated 2 hours, continues normalizing and is warming up to 910 DEG C, be incubated 4 hours, put into tempering furnace after air cooling to room temperature, is tempered and is warming up to 630 DEG C, and stove is cooled to 500 DEG C and comes out of the stove；
D, above-mentioned pretreated ocean platform canine tooth roller box foundry goods is carried out preliminary working, then described ocean platform canine tooth roller box foundry goods is put into normalizing furnace, be warming up to 890 DEG C, being incubated 6 hours, put into tempering furnace after quenching, tempering is warming up to 650 DEG C, being incubated 8 hours, stove is cooled to 550 DEG C and comes out of the stove.
Present invention is disclosed a kind of casting alloy material, ZG32CrNiMo alloy material for formula voluntarily, its formula is reasonable, the molten metal of this material melting have the feature of good fluidity, make the foundry goods of as cast condition have good tensile strength and good ductility；Disclosing simultaneously and cast the technique of ocean platform canine tooth roller box foundry goods, this technique advantages of simple with it, by bottom gating, rising head and the reasonable disposition of chill, make the foundry goods flawless of cast, yield rate is high；In addition after moulding by casting, foundry goods, through normalizing, tempering pretreatment and Tempering and Quenching, can eliminate casting stress, improves casting dimension accuracy and inherent quality.
The ocean platform canine tooth roller box foundry goods mechanical performance of casting meets: yield strength >=600MPa, tensile strength >=740MPa, elongation >=17%, the contraction percentage of area >=35% ,-40 impact values >=34J, single minima 27J, hardness 210-234HBW；
This ocean platform canine tooth roller box foundry goods Non-Destructive Testing meets: 100%MT detects a flaw, flawless；100%UT, meets GB/T 7233.1-2009
2 grades of requirements.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the invention and accompanying drawing content to be made or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, the most in like manner it is included in the scope of patent protection of the present invention.
Claims (6)
1. the technique casting ocean platform canine tooth roller box foundry goods, it is characterized in that, the cast alloy materials used in described technique is ZG32CrNiMo, its composition and quality proportioning be: C:0.26-0.35%, Si:0.20-0.40%, Mn:0.90-1.10%, Cr:0.50-0.80%, Ni:0.70-0.90%, Mo:0.30-0.40%, P≤0.025%, S≤0.020%, remaining is Fe；
Described technique comprises the steps:
A, phenolic sand molding: with the Flange Plane of described ocean platform canine tooth roller box as die joint, respectively constitute upper and lower involutory upper impression resin sand mould and lower impressions resin sand mould with phenolic sand molding；
B, running gate system, rising head and chill are set: described running gate system uses bottom gating, and including the cup being mutually communicated, sprue, cross gate and 2 road ingates, described sprue, cross gate, the diameter of 2 road ingates are 60mm；In the Flange Plane of the described ocean platform canine tooth roller box in described upper impression resin sand mould, open riser is set, described open riser has 3, including 2 cylindrical open risers and 1 oval cylindricality open riser, the structure of wherein said 2 cylindrical open risers is identical, equal sized；Arranging contoured chill at the thermal center of the described ocean platform canine tooth roller box in described lower impressions resin sand mould, described contoured chill has 2 pieces, symmetrical is placed at described thermal center；
C, casting of molten metal: pour into a mould the molten metal of described ZG32CrNiMo melting, the a diameter of 45mm of orifice, in casting process, pouring temperature is 1550 ± 10 DEG C, water molten metal described in weight 1200kg, the foundry goods of described ocean platform canine tooth roller box is i.e. obtained after casting complete, foundry goods is incubated 48 hours in sand mold, then sand removal gas cutting open riser；
D, normalizing+tempering pretreatment: the foundry goods of described ocean platform canine tooth roller box is put in normalizing furnace, normalizing is warming up to 620 ± 10 DEG C, it is incubated 2 hours, continue normalizing and be warming up to 900 ± 10 DEG C, it is incubated 4 hours, air cooling puts into tempering furnace to room temperature, and tempering is warming up to 620 ± 10 DEG C, and stove is cooled to 500 DEG C and comes out of the stove；
E: Tempering and Quenching: the foundry goods of the described ocean platform canine tooth roller box after normalizing+tempering pretreatment is carried out preliminary working, then foundry goods is put into normalizing furnace, it is warming up to 880 ± 10 DEG C, it is incubated 6 hours, tempering furnace is put into after quenching, tempering is warming up to 650 ± 10 DEG C, is incubated 8 hours, and stove is cooled to 550 DEG C and comes out of the stove.
The technique of casting ocean platform canine tooth roller box foundry goods the most according to claim 1, it is characterised in that the size of described 2 cylindrical open risers is: Φ 200mm × high 300mm, the size of described 1 oval cylindricality open riser is: waist 200mm × high 300mm.
The technique of casting ocean platform canine tooth roller box foundry goods the most according to claim 1, it is characterized in that, in described casting process, when metal bath surface rises to the 1/2-2/3 of described open riser height, adding heat preserving agent in described open riser, each open riser adds heat preserving agent 2Kg.
The technique of casting ocean platform canine tooth roller box foundry goods the most according to claim 1, it is characterised in that described gas cutting open riser temperature is not less than 150 DEG C.
The technique of casting ocean platform canine tooth roller box foundry goods the most according to claim 1, it is characterised in that described quenching uses water quenching method.
The technique of casting ocean platform canine tooth roller box foundry goods the most according to claim 1, it is characterised in that described normalizing, programming rate≤100 DEG C/h of tempering.
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| CN105154781A (en) * | 2015-08-31 | 2015-12-16 | 苏州金业船用机械厂 | Alloy material for casting marine engine cylinders |
| CN105149522A (en) * | 2015-08-31 | 2015-12-16 | 苏州金业船用机械厂 | Process for casting marine engine cylinders |
| CN107457368B (en) * | 2017-07-24 | 2019-11-12 | 绍兴市振杨机械有限公司 | A kind of casting mould of thin-walled impeller |
| CN110653340B (en) * | 2018-06-29 | 2021-02-19 | 宝山钢铁股份有限公司 | Manufacturing method of external block steel casting of width fixing machine |
| CN110202094B (en) * | 2019-06-13 | 2020-08-18 | 洛阳洛北重工机械有限公司 | Casting method of movable arm seat beam of large-scale loader |
| CN110270661A (en) * | 2019-07-23 | 2019-09-24 | 常熟市虹桥铸钢有限公司 | The casting method of part all-direction propeller gear-box peculiar to vessel |
| CN112605340B (en) * | 2020-12-16 | 2022-10-18 | 中车戚墅堰机车车辆工艺研究所有限公司 | Nodular cast iron integral low-floor light rail gear box and casting method thereof |
| CN115121767A (en) * | 2021-03-29 | 2022-09-30 | 常熟市虹桥铸钢有限公司 | Double-gate shell resin sand casting process |
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| CN103194687B (en) * | 2013-04-18 | 2015-06-17 | 中南大学 | Low-alloy high-strength cast steel for low temperature and preparation method thereof |
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