CN104785758A - Preparation method for aluminum bronze composite casting valve plate - Google Patents
Preparation method for aluminum bronze composite casting valve plate Download PDFInfo
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- CN104785758A CN104785758A CN201510206091.9A CN201510206091A CN104785758A CN 104785758 A CN104785758 A CN 104785758A CN 201510206091 A CN201510206091 A CN 201510206091A CN 104785758 A CN104785758 A CN 104785758A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
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Abstract
The invention provides a preparation method for an aluminum bronze composite casting valve plate. The preparation method comprises the following steps that 1 precoated sand is fetched and injected into a valve plate die cavity, heat preservation is conducted so that the precoated sand is solidified and formed, drawing is conducted, and a shell mould of the precoated sand is acquired; 2 a copper bush is fixed to an inner core of the shell mould of the precoated sand, then mould assembling is conducted, and the copper bush is vertically clamped to form a pouring cavity; the component of the copper bush is aluminum bronze; 3 iron liquid is acquired, then the iron liquid is poured into the pouring cavity, and a casting piece is acquired; 4 the casting piece is fetched and cooled, shot blasting and finishing are conducted, and a precoated sand shell-shaped composite casting valve plate is acquired. The yield of the composite casting piece can reach over 96% through the adoption of the preparation technology of the aluminum bronze composite casting valve plate, and the preparation technology of the aluminum bronze composite casting valve plate solves the long-existing technical problem puzzling the mass production in the prior art.
Description
Technical field
The invention belongs to casting technology field, particularly relate to a kind of preparation method covering arenaceous shell type aluminium bronze composite casting valve plate.
Background technology
Precoated sand is suitable for producing complex precise, requires higher various foundry goods, as automobile engine cylinder-body etc., precoated sand effectively can eliminate the distortion in casting process, the various casting flaw such as hot tearing, and the cast(ing) surface of preparation is brighter and cleaner, and size is more accurate, production cycle can be shortened, save raw metal, reduce production cost, and easily adopt automation in production process, reduce artificial use, coated sand technology is especially applicable to the production in enormous quantities manufacture of various middle-size and small-size foundry goods.
Shell moulded casting utilizes coated sand technology and derivative a kind of novel casting technique, specifically use sand in coating phenolic resin, but not common sand mold, the template of 180-280 degree is formed the shell of suitable thickness, and under normal circumstances, the thickness of shell is 6-12mm, afterwards shell is carried out heating cure, make the Rigidity and strength that shell reaches required, then utilize shell the Composition Modeling chamber, and then produce various foundry goods.Shell mold process excellent effect, the foundry goods clear-cut of casting, any surface finish, size is accurate, the follow-up workload greatly reducing machining.
The raising of foundry goods detailing requiments at any time, composite cast application is increasingly extensive, and namely adopt two or more metal to carry out casting the technique forming foundry goods, this composite casting technology can prepare more complicated foundry goods, the characteristic of comprehensive various metals, the foundry goods that forming property is more excellent.Copper iron valve plate, when casting, is adopt aluminium bronze copper sheathing or aluminium bronze copper sheathing, is embedded by copper sheathing in the valve plate of magnesium iron matrix and form.In process of production, after can adopting processing during casting, the mode embedded is merged in embedded mode or cast; After processing, embedded mode affects by machining accuracy, and tightness differs, and processing cost is higher; Cast is merged embedding and is required higher to technical process, and wherein the control of pouring type and fusion temperature is all very accurate.This composite cast also can adopt traditional clay-bonded sand green casting method preparation; but owing to the process employs horizontal parting cast; cause the copper sheathing in compound casting difficult at die cavity internal fixtion; easy off normal; foundry goods easily produces gas hole defect; product qualified rate is low, only reaches about 70%, is difficult to the requirement meeting large-scale production.
Chinese invention patent application 201310355164.1 (date of publication 2013.11.20) discloses a kind of method of Iron Mould Coated Sand cylindrical shell cast pistons ring, and its processing step comprises: Making mold, moulding, lower core, mould assembling, cast, unpack, casting cleaning and machined; Describedly be shaped to Iron Mould Coated Sand moulding; The sand layer thickness that covers of described Iron Mould Coated Sand is 6-8mm; The temperature of cast is 1380-1400 DEG C; The time of described cast is 23-28s; Described cast can not need rising head.The piston ring that the present invention produces meets performance requirement, and the dimensional accuracy with foundry goods is high, and allowance is little, and foundry goods yield rate is high, production efficiency advantages of higher.But this patent application does not disclose the concrete technology system about compound casting.
Chinese invention patent application 201410411068.9 (date of publication 2014.11.5) discloses the casting technique of a kind of Sand-Faced Metal Mould Casting spheroidal graphite cast-iron hinge ear, this technique is by design and the hinge on all four master mold of ear shape and swage, then make by penetrating sand mechanism the upper and lower swage die cavity covering sand covering layer of sand with 6-8mm, finally according to charger sheet, the qualified molten iron made is poured in the lumen type after mould assembling, to be cast complete after, unpack and obtain casting hinge ear part.The hinge ear of the more traditional forged steel material of this Sand-Faced Metal Mould Casting technique, production cost can reduce by 35%, plenty of time and the cost such as manpower, equipment are saved, effectively improve production efficiency and castability simultaneously, reduce casting wasted product rate, and this is simple for process, wide market, remarkable in economical benefits, is applicable to most enterprise and uses.But this patent application does not disclose the concrete technology system about compound casting.
Chinese invention patent application 201410544297.8 (date of publication 2015.1.21) discloses a kind of iron die sand casting process, belong to casting technology field; It is high that technical problem to be solved is to provide a kind of casting dimension accuracy, the high and iron die sand casting process that deflection is less of surface smoothness; The technical scheme adopted is: be 1450 DEG C-1600 DEG C by controlling the pouring temperature of molten iron, be less than the duration of pouring 60 seconds and some other process conditions to reduce the stress deformation of foundry goods, adopt the axle housing foundry goods that technical process of the present invention manufactures, surface smoothness, dimensional accuracy is high, and deflection is little.
Summary of the invention
Provide hereinafter about brief overview of the present invention, to provide about the basic comprehension in some of the present invention.Should be appreciated that this general introduction is not summarize about exhaustive of the present invention.It is not that intention determines key of the present invention or pith, and nor is it intended to limit the scope of the present invention.Its object is only provide some concept in simplified form, in this, as the preorder in greater detail discussed after a while.
The invention provides a kind of preparation method of aluminium bronze composite casting valve plate, its preparation method is made up of following steps:
Step one, gets precoated sand and injects valve plate die cavity, and insulation makes precoated sand curing molding, molding, obtains resin-coated sand shell mould;
Step 2, is fixed on copper sheathing on the inner core of resin-coated sand shell mould, afterwards mould assembly vertical clamping, forms cast die cavity; The component of described copper sheathing is aluminium bronze, and the component of described aluminium bronze is specially: aluminium 5.5-10.2%, iron 0.45-0.50%, manganese 1.5-1.8%, silicon 0.05-0.09%, zinc 0.56-0.87%, tin 0.03-0.08%, nickel 0.31-0.45%, plumbous 0.01-0.02%, surplus is copper;
Step 3, gets iron liquid, afterwards by iron liquid casting to cast die cavity in, obtain foundry goods;
Step 4, gets foundry goods, and cooling, ball blast finishing, obtains the preparation method of aluminium bronze composite casting valve plate.
Compared with prior art, the present invention has following beneficial effect: in composite casting valve plate of the present invention, and copper fusing point is 1084 DEG C, and boiling point is 2567 DEG C; The fusing point of iron copper differs from about 500 DEG C, and the temperature therefore accurately controlling molten iron cast has vital meaning; In order to ensure the quality of composite casting valve plate, guarantee that the exact position of copper sheathing in foundry goods is also the place casting successfully key.The compound casting precision that method of the present invention makes is high, copper sheathing accurate positioning; Present invention employs pouring in vertically clamped moulds simultaneously, shorten the duration of pouring, realize the temperature difference accurately controlling molten metal, effectively solve copper sheathing fixing difficulty in die cavity, in casting process, easily off normal and foundry goods easily produce the technical problem of gas hole defect to copper sheathing; Adopt preparation technology of the present invention, the qualification rate of compound casting can to more than 96%, and technique of the present invention solves the technical barrier of prior art long felt mass production.
Detailed description of the invention
Embodiments of the invention are described below.The element described in one embodiment of the invention and feature can combine with the element shown in one or more other embodiment and feature.It should be noted that for purposes of clarity, in explanation, eliminate expression and the description of unrelated to the invention, parts known to persons of ordinary skill in the art and process.
Embodiment 1
The present embodiment relates to a kind of preparation method of aluminium bronze composite casting valve plate, and described preparation method is made up of following steps:
Step one, gets precoated sand and injects valve plate die cavity, and insulation makes precoated sand curing molding, molding, obtains resin-coated sand shell mould; Described what inject employing is penetrate sand machine, and the Stress control penetrating sand machine is 0.7Mpa; The temperature of penetrating sand machine controls to be 205 DEG C; Penetrating the number of times that sand machine penetrates sand is 4 times, and the interval time of at every turn penetrating sand is 4 seconds; Before injecting valve plate die cavity, being heated to temperature to valve plate die cavity is 175 DEG C; Described insulation is specially: keep temperature to be 186 DEG C, the time is 15 seconds; Described valve plate die cavity is provided with the inner core coordinated with copper sheathing;
Step 2, is fixed on copper sheathing on the inner core of resin-coated sand shell mould, afterwards mould assembly vertical clamping, forms cast die cavity; The component of described copper sheathing is aluminium bronze, and the component of described aluminium bronze is specially: aluminium 5.5-10.2%, iron 0.45-0.50%, manganese 1.5-1.8%, silicon 0.05-0.09%, zinc 0.56-0.87%, tin 0.03-0.08%, nickel 0.31-0.45%, plumbous 0.01-0.02%, surplus is copper;
Step 3, gets iron liquid, afterwards by iron liquid casting to cast die cavity in, obtain foundry goods; The temperature of described iron liquid is 1450 DEG C; Described cast is specially: place cup and pour into a mould, adopt pouring in vertically clamped moulds mode, and the height of casting ladle distance cup is 9cm; The time of described cast is 10 seconds; Be calculated in mass percent, in described iron liquid, carbon≤3.2%, silicon≤1.8%, manganese≤0.3%;
Step 4, gets foundry goods, and cooling, ball blast finishing, must cover arenaceous shell type composite casting valve plate.
The effect of the present embodiment is: prepared by the present embodiment cover arenaceous shell type composite casting valve plate qualification rate reaches 96%, owing to controlling the problem of iron liquid, adopt pouring in vertically clamped moulds, control the duration of pouring, make copper sheathing position in foundry goods accurate, Casting Blowholes defect is overcome, and makes foundry goods can mass production, solves the technical barrier of prior art long felt mass production.
Embodiment 2
The present embodiment relates to a kind of preparation method of aluminium bronze composite casting valve plate, and described preparation method is made up of following steps:
Step one, gets precoated sand and injects valve plate die cavity, and insulation makes precoated sand curing molding, molding, obtains resin-coated sand shell mould; Described what inject employing is penetrate sand machine, and the Stress control penetrating sand machine is 1.0Mpa; The temperature of penetrating sand machine controls to be 225 DEG C; Penetrating the number of times that sand machine penetrates sand is 4 times, and the interval time of at every turn penetrating sand is 5 seconds; Before injecting valve plate die cavity, being heated to temperature to valve plate die cavity is 185 DEG C; Described insulation is specially: keep temperature to be 195 DEG C, the time is 25 seconds; Described valve plate die cavity is provided with the inner core coordinated with copper sheathing;
Step 2, is fixed on copper sheathing on the inner core of resin-coated sand shell mould, afterwards mould assembly vertical clamping, forms cast die cavity; The component of described copper sheathing is aluminium bronze, and the component of described aluminium bronze is specially: aluminium 5.5-10.2%, iron 0.45-0.50%, manganese 1.5-1.8%, silicon 0.05-0.09%, zinc 0.56-0.87%, tin 0.03-0.08%, nickel 0.31-0.45%, plumbous 0.01-0.02%, surplus is copper;
Step 3, gets iron liquid, afterwards by iron liquid casting to cast die cavity in, obtain foundry goods; The temperature of described iron liquid is 1500 DEG C; Described cast is specially: place cup and pour into a mould, adopt pouring in vertically clamped moulds mode, and the height of casting ladle distance cup is 12cm; The time of described cast is 50 seconds; Be calculated in mass percent, in described iron liquid, carbon≤3.2%, silicon≤1.8%, manganese≤0.3%;
Step 4, gets foundry goods, and cooling, ball blast finishing, must cover arenaceous shell type composite casting valve plate.
The effect of the present embodiment is: prepared by the present embodiment cover arenaceous shell type composite casting valve plate qualification rate reaches 97%, owing to controlling the problem of iron liquid, adopt pouring in vertically clamped moulds, control the duration of pouring, make copper sheathing position in foundry goods accurate, Casting Blowholes defect is overcome, and makes foundry goods can mass production, solves the technical barrier of prior art long felt mass production.
Embodiment 3
The present embodiment relates to a kind of preparation method of aluminium bronze composite casting valve plate, and described preparation method is made up of following steps:
Step one, gets precoated sand and injects valve plate die cavity, and insulation makes precoated sand curing molding, molding, obtains resin-coated sand shell mould; Described what inject employing is penetrate sand machine, and the Stress control penetrating sand machine is 0.8Mpa; The temperature of penetrating sand machine controls to be 220 DEG C; Penetrating the number of times that sand machine penetrates sand is 4 times, and the interval time of at every turn penetrating sand is 4 seconds; Before injecting valve plate die cavity, being heated to temperature to valve plate die cavity is 180 DEG C; Described insulation is specially: keep temperature to be 190 DEG C, the time is 20 seconds; Described valve plate die cavity is provided with the inner core coordinated with copper sheathing;
Step 2, is fixed on copper sheathing on the inner core of resin-coated sand shell mould, afterwards mould assembly vertical clamping, forms cast die cavity; The component of described copper sheathing is aluminium bronze, and the component of described aluminium bronze is specially: aluminium 5.5-10.2%, iron 0.45-0.50%, manganese 1.5-1.8%, silicon 0.05-0.09%, zinc 0.56-0.87%, tin 0.03-0.08%, nickel 0.31-0.45%, plumbous 0.01-0.02%, surplus is copper;
Step 3, gets iron liquid, afterwards by iron liquid casting to cast die cavity in, obtain foundry goods; The temperature of described iron liquid is 1480 DEG C; Described cast is specially: place cup and pour into a mould, adopt pouring in vertically clamped moulds mode, and the height of casting ladle distance cup is 11cm; The time of described cast is 33 seconds; Be calculated in mass percent, in described iron liquid, carbon≤3.2%, silicon≤1.8%, manganese≤0.3%;
Step 4, gets foundry goods, and cooling, ball blast finishing, must cover arenaceous shell type composite casting valve plate.
The effect of the present embodiment is: prepared by the present embodiment cover arenaceous shell type composite casting valve plate qualification rate reaches 98%, owing to controlling the problem of iron liquid, adopt pouring in vertically clamped moulds, control the duration of pouring, make copper sheathing position in foundry goods accurate, Casting Blowholes defect is overcome, and makes foundry goods can mass production, solves the technical barrier of prior art long felt mass production.
In general, preparation method of the present invention is made up of following steps: step one, gets precoated sand and injects valve plate die cavity, and insulation makes precoated sand curing molding, molding, obtains resin-coated sand shell mould; Step 2, is fixed on copper sheathing on the inner core of resin-coated sand shell mould, afterwards mould assembly vertical clamping, forms cast die cavity; The component of described copper sheathing is aluminium bronze, and the component of described aluminium bronze is specially: aluminium 5.5-10.2%, iron 0.45-0.50%, manganese 1.5-1.8%, silicon 0.05-0.09%, zinc 0.56-0.87%, tin 0.03-0.08%, nickel 0.31-0.45%, plumbous 0.01-0.02%, surplus is copper; Step 3, gets iron liquid, afterwards by iron liquid casting to cast die cavity in, obtain foundry goods; Step 4, gets foundry goods, and cooling, ball blast finishing, must cover arenaceous shell type composite casting valve plate.
Preferably, in step one, described in what inject employing is penetrate sand machine, the Stress control penetrating sand machine is 07Mpa-1.0Mpa.As preferably, in step one, the temperature of penetrating sand machine controls as 205-225 DEG C.As preferably, in step one, penetrating the number of times that sand machine penetrates sand is 4 times, and the interval time of at every turn penetrating sand is 4-5 second.As preferably, in step one, before injecting valve plate die cavity, being heated to temperature to valve plate die cavity is 175-185 DEG C.As preferably, in step one, described insulation is specially: maintenance temperature is 186-195 DEG C, and the time is 15-25 second.The treatment process penetrating sand in the present invention has vital effect for the formation of resin-coated sand shell mould, the setting of these parameters and follow-up iron fluid component, heating-up temperature, pouring type, the components of copper sheathing etc. have direct impact, all parametric synthesis form a complete technical system, and final realization promotes the technique effect that arenaceous shell type composite casting valve plate qualification rate is covered in the present invention.
As preferably, in step one, described valve plate die cavity is provided with the inner core coordinated with copper sheathing.The setting of inner core, after making to penetrate sand, resin-coated sand shell mould inside forms the inner core matched with copper sheathing, be convenient to follow-up copper sheathing fix, to efficiently solve in die cavity fixing difficulty, and the technical problem of the easy off normal of copper sheathing in casting process, significantly improve the qualification rate of production efficiency and product.
In the present invention, the component of described copper sheathing is aluminium bronze, and the component of described aluminium bronze is specially: aluminium 5.5-10.2%, iron 0.45-0.50%, manganese 1.5-1.8%, silicon 0.05-0.09%, zinc 0.56-0.87%, tin 0.03-0.08%, nickel 0.31-0.45%, plumbous 0.01-0.02%, surplus is copper; Comparatively tin bronze is high for the intensity of aluminium bronze, and high temperature oxidation resistance is better, and aluminium bronze has higher intensity, good anti-wear performance.In the present invention, the aluminium bronze of selected specific components, coordinates with the iron liquid of specific components, adopts specific process parameter in each step of the present invention to process, and then the composite casting valve plate of ability forming property excellence.
As preferably, in step 3, the temperature of described iron liquid is 1450-1500 DEG C; Described cast is specially: place cup and pour into a mould, adopt pouring in vertically clamped moulds mode, and the height of casting ladle distance cup is 9-12cm; The time of described cast is 10-50 second.As preferably, in step 3, be calculated in mass percent, in described iron liquid, carbon≤3.2%, silicon≤1.8%, manganese≤0.3%.The selection of iron fluid component has vital effect for the control of temperature, suitable iron fluid component is selected in the present invention, control the temperature of iron liquid, stand-by period before effective shortening cast, reduce the degree of iron liquid by external environment oxidation, control height and the duration of pouring of cast simultaneously, effectively can shorten the duration of pouring further, realize the temperature difference accurately controlling iron liquid, effective solution copper sheathing is fixing difficulty in die cavity, and in casting process, easily off normal and foundry goods easily produce the technical problem of gas hole defect to copper sheathing.
In sum, in composite casting valve plate of the present invention, copper fusing point is 1084 DEG C, and boiling point is 2567 DEG C; The fusing point of iron copper differs from about 500 DEG C, and the temperature therefore accurately controlling molten iron cast has vital meaning; In order to ensure the quality of composite casting valve plate, guarantee that the exact position of copper sheathing in foundry goods is also the place casting successfully key.The compound casting precision that method of the present invention makes is high, copper sheathing accurate positioning; Present invention employs pouring in vertically clamped moulds simultaneously, shorten the duration of pouring, realize the temperature difference accurately controlling molten metal, effectively solve copper sheathing fixing difficulty in die cavity, in casting process, easily off normal and foundry goods easily produce the technical problem of gas hole defect to copper sheathing; Adopt preparation technology of the present invention, the qualification rate of compound casting can to more than 95%, and technique of the present invention solves the technical barrier of prior art long felt mass production.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a preparation method for aluminium bronze composite casting valve plate, is characterized in that, described preparation method is made up of following steps:
Step one, gets precoated sand and injects valve plate die cavity, and insulation makes precoated sand curing molding, molding, obtains resin-coated sand shell mould;
Step 2, is fixed on copper sheathing on the inner core of resin-coated sand shell mould, afterwards mould assembly vertical clamping, forms cast die cavity;
The component of described copper sheathing is aluminium bronze, and the component of described aluminium bronze is specially: aluminium 5.5-10.2%, iron 0.45-0.50%, manganese 1.5-1.8%, silicon 0.05-0.09%, zinc 0.56-0.87%, tin 0.03-0.08%, nickel 0.31-0.45%, plumbous 0.01-0.02%, surplus is copper;
Step 3, gets iron liquid, afterwards by iron liquid casting to cast die cavity in, obtain foundry goods;
Step 4, gets foundry goods, and cooling, ball blast finishing, must cover arenaceous shell type composite casting valve plate.
2. the preparation method of aluminium bronze composite casting valve plate according to claim 1, is characterized in that, in step one, described in what inject employing is penetrate sand machine, the Stress control penetrating sand machine is 07Mpa-1.0Mpa.
3. the preparation method of aluminium bronze composite casting valve plate according to claim 1, is characterized in that, in step one, the temperature of penetrating sand machine controls as 205-225 DEG C.
4. the preparation method of aluminium bronze composite casting valve plate according to claim 1, is characterized in that, in step one, penetrating the number of times that sand machine penetrates sand is 4 times, and the interval time of at every turn penetrating sand is 4-5 second.
5. the preparation method of aluminium bronze composite casting valve plate according to claim 1, is characterized in that, in step one, before injecting valve plate die cavity, being heated to temperature to valve plate die cavity is 175-185 DEG C.
6. the preparation method of aluminium bronze composite casting valve plate according to claim 1, is characterized in that, in step one, described insulation is specially: maintenance temperature is 186-195 DEG C, and the time is 15-25 second.
7. the preparation method of aluminium bronze composite casting valve plate according to claim 1, is characterized in that, in step one, described valve plate die cavity is provided with the inner core coordinated with copper sheathing.
8. the preparation method of aluminium bronze composite casting valve plate according to claim 1, is characterized in that, in step 3, the temperature of described iron liquid is 1450-1500 DEG C.
9. the preparation method of aluminium bronze composite casting valve plate according to claim 1, it is characterized in that, described cast is specially: place cup and pour into a mould, adopt pouring in vertically clamped moulds mode, and the height of casting ladle distance cup is 9-12cm; The time of described cast is 10-50 second.
10. the preparation method of aluminium bronze composite casting valve plate according to claim 1, is characterized in that, in step 3, be calculated in mass percent, in described iron liquid, and carbon≤3.2%, silicon≤1.8%, manganese≤0.3%.
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| CN201510206091.9A CN104785758B (en) | 2015-04-27 | 2015-04-27 | The preparation method of aluminium bronze composite casting valve plate |
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| CN201510206091.9A CN104785758B (en) | 2015-04-27 | 2015-04-27 | The preparation method of aluminium bronze composite casting valve plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109351948A (en) * | 2018-11-01 | 2019-02-19 | 苏州市海威特铸造厂 | A kind of casting technique of copper and iron castingin casting |
| CN109930017A (en) * | 2019-04-15 | 2019-06-25 | 中北大学 | A kind of preparation method of high strength copper alloy |
| CN110695342A (en) * | 2019-11-29 | 2020-01-17 | 南京宝泰特种材料股份有限公司 | Casting mold and casting method for bimetal impeller shell |
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| CN104190866A (en) * | 2014-08-18 | 2014-12-10 | 宁国市四方钢球模具设备有限公司 | Sand coating manufacturing method for double-metal alloy hammer |
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| US3802484A (en) * | 1972-08-08 | 1974-04-09 | A Ovodov | Apparatus for producing foundry cores |
| CN101954466A (en) * | 2010-11-02 | 2011-01-26 | 北京中煤矿山工程有限公司 | Centrifugal casting process for shell of bimetal compound metallurgical wedge hob |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109351948A (en) * | 2018-11-01 | 2019-02-19 | 苏州市海威特铸造厂 | A kind of casting technique of copper and iron castingin casting |
| CN109351948B (en) * | 2018-11-01 | 2020-07-03 | 苏州市海威特铸造厂 | Casting process of copper-iron insert casting |
| CN109930017A (en) * | 2019-04-15 | 2019-06-25 | 中北大学 | A kind of preparation method of high strength copper alloy |
| CN110695342A (en) * | 2019-11-29 | 2020-01-17 | 南京宝泰特种材料股份有限公司 | Casting mold and casting method for bimetal impeller shell |
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| CN104785758B (en) | 2017-03-08 |
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