CN103993216A - Plunger for compressor pump body, production method thereof as well as compressor and refrigeration equipment - Google Patents
Plunger for compressor pump body, production method thereof as well as compressor and refrigeration equipment Download PDFInfo
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- CN103993216A CN103993216A CN201410225658.2A CN201410225658A CN103993216A CN 103993216 A CN103993216 A CN 103993216A CN 201410225658 A CN201410225658 A CN 201410225658A CN 103993216 A CN103993216 A CN 103993216A
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Abstract
The invention discloses a plunger for a compressor pump body, a production method thereof as well as a compressor and refrigeration equipment. The plunger for the compressor pump body is made from vermicular graphite cast iron, wherein the vermicular graphite cast iron contains the following components in percentage by weight: 3.2%-3.8% of C, 2.0%-3.0% of Si, 0.5%-1% of Mn, not higher than 1.0% of Cu, not higher than 0.3% of P, not higher than 0.06% of S and the balance of iron.
Description
Technical field
The present invention relates to compressor field, particularly, relate to compressor pump piston and preparation method thereof and compressor and refrigeration equipment.
Background technology
International and domestic Ge great air-conditioning manufacturer generally adopts totally-enclosed rolling piston rotating air conditioner compressor.Compressor pump comprises the assemblies such as cylinder, metal (upper, piston, slide plate and bent axle, and is made up of the cavity of compression refrigerant mixed gas cylinder, metal (upper, piston and slide plate.Because Pump Body Parts clearance leakage, Suck and exhaust pressure loss and frictionloss all can cause very big impact to compressor efficiency, between each part, wear and tear and can cause when excessive the performance of compressor obviously to decline and even lost efficacy, and above-mentioned factor has great relation with material and the machining of Pump Body Parts, require pump housing parts material to have good working accuracy and wear resisting property.Cylinder, metal (upper and piston material, the relevant producer of compressor industry generally adopts grey cast iron manufacture.Especially piston, Ge great Compressors Factory all adopts the HT300 that the trade mark is higher conventionally, meanwhile, for strengthening wear resistance, also in matrix, adds the alloying elements such as Ni, Cr, Mo.
Piston adopts HT300 alloy gray cast-iron, and there are the following problems:
Manufacturing is poor: first, grey cast iron is along with the raising castibility of the trade mark declines, and contraction cavity ratio increases.HT300 foundry goods contraction cavity ratio, up to 3.94%, meanwhile, for improving its wear resistance, is added alloying element to form hard point in matrix in its composition, the mach difficulty that this also makes casting yield further reduce and greatly increase.
Larger with other Pump Body Parts difference of linear expansions.Because the each part of the pump housing adopts different materials, wherein cylinder and bearing adopt HT200～250, and piston adopts HT300 cast alloy iron, and bent axle adopts QT600.The coefficient-of-linear-expansion difference of three kinds of materials is larger, and the especially linear expansivity of piston and cylinder, in the time of compressor operating temperature range, differs and reaches 1.5 × 10
-6/ K; And the linear expansivity of piston and bent axle differs also larger.If each coordinating size gap design is larger, cause the volumetric efficiency loss of complete machine larger, and gap design is hour, the variation of actual gap while causing running, causes compressor operation fault.
Wear resistance deficiency: other parts of piston and compressor pump exist rolling resistance and sliding friction, it is one of worst part of friction condition in the each part of compressor pump, the higher trade mark, more wear-resisting material are adopted even if compare other parts, but after long-term heavy loading running, due to its flake graphite form has the effect of isolating of matrix is determined, it often remains the most serious part of wearing and tearing.
Cost is higher: along with the increase of the grey cast iron trade mark, casting cost obviously improves, and meanwhile, owing to increasing alloying element in matrix, especially Ni and Mo belong to noble metal, cause the further raising of piston cost.
Therefore, no matter from material behavior to the meeting of compressor service requirements, or starting material and manufacturing cost, present stage the alloy gray cast-iron piston that uses of the pump housing of compressor still to be improved.
Summary of the invention
The present invention is intended to solve at least to a certain extent one of technical problem in correlation technique.For this reason, one object of the present invention be to propose that a kind of manufacturing is good, linear expansivity and cylinder, crankshaft material approach, antiwear property is strong and the lower-cost piston for compressor.
As previously mentioned, piston adopts grey cast iron or an ash mouthful cast alloy iron to have problems, thereby finds the alternative material of a kind of more suitably material as grey cast iron, to bring into play better the performance of compressor, becomes an instant task.
Thereby, according to an aspect of the present invention, the present invention proposes a kind of compressor pump piston, it is characterized in that, described piston is made up of vermicular cast iron, and described vermicular cast iron comprises: the C of 3.2～3.8 % by weight; The Si of 2.0～3.0 % by weight; The Mn of 0.5～1 % by weight; Not higher than the Cu of 1.0 % by weight; Not higher than the P of 0.3 % by weight; Not higher than the S of 0.06 % by weight; And the iron of surplus.
The compressor pump of the above embodiment of the present invention is made up of the vermicular cast iron with said components with piston thus, makes it have better machinability, and the stability of tolerance clearance improves, and has also strengthened the abrasion resistance of piston simultaneously, has reduced cost.
In addition, compressor pump according to the above embodiment of the present invention can also have following additional technical characterictic with piston:
In some embodiments of the invention, described vermicular cast iron also comprises: the Cr of 0.5～1.0 % by weight, the Ni of 0.1～0.5 % by weight and not higher than the Mo of 0.5 % by weight.
In some embodiments of the invention, the nodulizing rate of described vermicular cast iron is 40%～90%.Can ensure thus the quantity of quasiflake graphite in piston matrix, further strengthen the wearability of compressor pump piston, improve the abrasion of piston, slide plate and cylinder, make the concrete good precision stability of compressor.
In some embodiments of the invention, the tensile strength of described vermicular cast iron is not less than 320MPa.The intensity that can effectively improve thus compressor pump piston, the voltage endurance capability of jigger lifting piston, increases the compression ratio range of its use, adapts to for more refrigerant.
In some embodiments of the invention, the Young's modulus of described vermicular cast iron is not less than 145GPa.Can further improve thus the compressor pump rigidity of piston and the thermostability of tolerance clearance, and then provide space for reducing to match gap, can make compressor performance be promoted.
According to a second aspect of the invention, the present invention proposes a kind of method of preparing compressor pump piston, comprising:
Melting raw mixture is provided;
Described melting raw mixture is carried out to melting, to obtain mixing molten iron;
In described mixing molten iron, add wriggling of vermiculizer to process;
The mixing molten iron that wriggling described in process processed is poured into a mould, to obtain piston crude product; And
Described piston crude product is carried out to processing treatment, to obtain described compressor pump piston,
Wherein,
Described melting raw mixture comprises:
The C of 3.2～3.8 % by weight; The Si of 2.0～3.0 % by weight; The Mn of 0.5～1 % by weight; Not higher than the Cu of 1.0 % by weight; Not higher than the P of 0.3 % by weight; Not higher than the S of 0.06 % by weight; And the iron of surplus.
Utilize compressor pump piston that aforesaid method prepares to have cost lower, deflection is lower, the advantage that abrasion resistance properties is stronger.
According to some embodiments of the present invention, described vermiculizer is rare earth zinc-magnesium aluminium alloy.
According to some embodiments of the present invention, the add-on of described rare earth zinc-magnesium aluminium alloy is 0.3～0.5 % by weight of described mixing molten iron.
According to some embodiments of the present invention, before described piston crude product is carried out to processing treatment, further comprise: by described quench-temper of piston crude product.The hardness that can improve vermicular cast iron is thus to HRC43～53.
According to a third aspect of the invention we, the present invention proposes a kind of compressor, the compressor pump piston that this compressor comprises foregoing compressor pump piston or prepared by the foregoing method of preparing compressor pump piston.Thus, compressor cost of the present invention is lower, and manufacturing is good, coordinating size good stability, and deflection is lower, and abrasion resistance properties is stronger.
According to a forth aspect of the invention, the present invention proposes a kind of refrigeration equipment, this refrigeration equipment comprises foregoing compressor, and described refrigeration equipment is air-conditioning and/or refrigerator.Can further improve thus the quality of refrigeration equipment.
Embodiment
Describe the compressor pump piston of the above embodiment of the present invention below in detail.Be made up of vermicular cast iron with piston according to the compressor pump of the embodiment of the present invention, vermicular cast iron comprises: the C of 3.2～3.8 % by weight; The Si of 2.0～3.0 % by weight; The Mn of 0.5～1 % by weight; Not higher than the Cu of 1.0 % by weight; Not higher than the P of 0.3 % by weight; Not higher than the S of 0.06 % by weight; And the iron of surplus.
Can significantly improve thus intensity, Young's modulus and the abrasion resistance of piston; And without adding expensive alloy material to promote non-deformability and wear resistance, can effectively reduce costs thus.
According to a particular embodiment of the invention, above-mentioned vermicular cast iron can also comprise: the Cr of 0.5～1.0 % by weight, the Ni of 0.1～0.5 % by weight and not higher than the Mo of 0.5 % by weight.Can further improve thus homogeneity, hardness and the wear resistance of structure of cast iron.By controlling the add-on of Cr, Ni and Mo, can effectively improve casting hardness and wear resistance, be unlikely to again to increase significantly cost simultaneously.Therefore, the cost performance of the vermicular cast iron of the above embodiment of the present invention is higher, therefore utilizes its piston of preparing cost in having superperformance more preferential.
According to a particular embodiment of the invention, the nodulizing rate that has a vermicular cast iron of said components can reach 40%～90%.The wearability that can further strengthen thus compressor pump piston, improves the abrasion of piston, slide plate and cylinder, makes the concrete good precision stability of compressor.The as cast condition matrix of piston comprises perlite and ferrite, and wherein content of pearlite in alloy is 35%～100%.Ferrite content is 0%～65%, makes thus vermicular cast iron have good manufacturing.And general vermicular cast iron has higher ferrite content, and metallic substance taking ferrite as matrix, because of ductility good, material stickness, when machining, blade can very fast rust, abrasive grinding wheel is also easy to stick with paste flat skidding, thus piston of the present invention its there is perlite and account for a certain proportion of mixed matrix, machinability is better than the general main vermicular cast iron taking ferrite as matrix.Owing to not adding the alloying elements such as Ti in above-mentioned vermicular cast iron, therefore do not contain unmanageable Ti alloy hard point in matrix, above-mentioned vermicular cast iron of the present invention has good processing machinability thus, and processing machinability is better than HT300 alloy gray cast-iron simultaneously.
Compressor pump according to the above embodiment of the present invention adopts the vermicular cast iron with said components to make with piston, makes vermicular cast iron have better properties owing to having said components, and the tensile strength of for example this vermicular cast iron is not less than 320MPa; Young's modulus is not less than 145GPa; Hardness reaches HRC43～53.Therefore the piston being prepared by the vermicular cast iron with above-mentioned performance also will have good tensile property, rigidity and good hardness.
According to a second aspect of the invention, the invention allows for a kind of method of preparing compressor pump piston, the method specifically comprises the following steps:
Melting raw mixture is provided;
Melting raw mixture is carried out to melting, to obtain mixing molten iron;
Add wriggling of vermiculizer to process to mixing in molten iron;
The mixing molten iron of processing through wriggling is poured into a mould, to obtain piston crude product; And
Piston crude product is carried out to processing treatment, to obtain compressor pump piston,
Wherein,
Melting raw mixture comprises:
The C of 3.2～3.8 % by weight; The Si of 2.0～3.0 % by weight; The Mn of 0.5～1 % by weight; Not higher than the Cu of 1.0 % by weight; Not higher than the P of 0.3 % by weight; Not higher than the S of 0.06 % by weight; And the iron of surplus.
Prepare the piston with vermicular cast iron structure and can significantly improve thus intensity and the Young's modulus of piston by aforesaid method.And without adding expensive alloy material to promote non-deformability and wear resistance, can effectively reduce costs thus.Adopt precoated sand shell casting technique, casting dimension accuracy promotes simultaneously, and process redundancy reduces, and piston cost is declined.
According to a particular embodiment of the invention, it can be rare earth zinc-magnesium aluminium alloy that wriggling processed the vermiculizer adopting, wriggling can all add it bag end or half to add bag end half to add with stream while processing, can realize self-boiling, without stir process when wriggling of vermiculizer.This vermiculizer is easy to mixed molten iron is melting and absorbs in the time that wriggling processed, and mixes molten iron surface scum few, and wriggling is even, and the chilling tendency of the iron of wriggling is little, and without carrying out inoculation, and then simplified technique.According to a particular embodiment of the invention, the add-on of above-mentioned vermiculizer rare earth zinc-magnesium aluminium alloy can be for mixing 0.3～0.5 % by weight of molten iron.Can effectively prepare thus vermicular cast iron piston, to further improve the performance of piston.
According to a particular embodiment of the invention, after piston crude product has been cast, be incubated 7～12 hours and carry out again demoulding processing.Can effectively avoid thus the generation of spoken parts in traditional operas, and then improve the quality of piston.
According to a particular embodiment of the invention, before piston crude product is carried out to processing treatment, can further include: to quench-temper of piston crude product.Can further improve thus the hardness of piston crude product, for example, can make the hardness of piston crude product reach HRC43～53.
According to a particular embodiment of the invention, fusion process on average mixes molten iron temperature at 1500～1520 degrees Celsius, can eliminate thus inherited genetic factors; The temperature of mixing molten iron while simultaneously cast is controlled at 1450～1480 degrees Celsius, to ensure the consistence of vermiculation effect and nodulizing rate.According to a particular embodiment of the invention, above-mentioned mixing molten iron has good mobility in the process of cast, and then has improved castibility, has reduced casting fraction defective, the contraction cavity ratio of the piston crude product simultaneously obtaining has also declined, and the quality therefore with the piston of said components is significantly improved.
According to a third aspect of the invention we, the invention allows for a kind of compressor, this compressor comprises the compressor pump piston of embodiment above.Therefore, adopt the piston with above-mentioned premium properties further to improve the working efficiency of compressor and the quality of compressor.
According to a forth aspect of the invention, the present invention has also proposed a kind of refrigeration equipment, and this refrigeration equipment comprises the compressor of embodiment above, and according to a particular embodiment of the invention, the refrigeration equipment with this compressor can be air-conditioning and/or refrigerator.Because above-mentioned compressor has good performance, therefore can further improve the quality of refrigeration equipment.
Compared with prior art, the compressor pump of the above embodiment of the present invention is prepared with piston and utilization the piston that the method for compressor pump piston prepares and is all had following beneficial effect:
1, good manufacturing: adopt technical scheme of the present invention, compared with HT300 alloy gray iron, the mobility of casting process mixing molten iron improves, and castibility promotes, and casting fraction defective drops to 2.1% from 4.3%; Simultaneously the contraction cavity ratio of foundry goods is from 4% dropping to 1.5% nearly, and quality obviously promotes; Meanwhile, the machining machinability of vermicular cast iron is also better than HT300 alloy gray cast-iron.
2, improved the thermostability of tolerance clearance: adopt technical scheme of the present invention, adopt vermicular cast iron piston, in the time that cylinder, bent axle adopt vermicular cast iron simultaneously, because material is identical, tolerance clearance is good thermal stability in the time of compressor operating; Even adopt HT250 at cylinder, when bent axle employing QT600, because wriggle iron and its linear expansivity approach, each tolerance clearance does not also change while apolegamy with assembling in the time of work substantially.By vermicular cast iron piston is installed with vermicular cast iron cylinder, the HT250 cylinder composition pump housing respectively, the apolegamy height gap of cylinder and piston can be reduced to 3 microns, and after tested, compressor performance can promote 3～4 points.
3, abrasion resistance increases: vermicular graphite cast iron form is vermiform, forms coralliform three-dimensional arrangement in space, flake graphite relatively, and it is short and thick, better with the associativity of matrix, is more conducive to reduce friction.And under lubricated sliding wear condition, the fine recess forming after the quasiflake graphite after the wearing and tearing of vermicular cast iron matrix comes off is storing lubricating oil, can effectively ensure the continuity of oil film, avoid the generation of microcosmic stick zone.
4, material cost reduces: owing to adopting vermicular cast iron, intensity and the Young's modulus of piston significantly promote, and it does not need to add expensive alloy material to promote non-deformability and wear resistance, can effectively reduce costs thus.Due to the employing of precoated sand shell casting technique, casting dimension accuracy promotes again, and process redundancy reduces, and piston cost is declined.
Embodiment 1
Prepare compressor pump piston, apolegamy melting raw material: by the C of 1.8Kg; The Si of 1.3Kg; The Mn of 0.3Kg; The Cu of 0.25Kg and the iron of 47Kg, the P of 0.05 % by weight wherein containing, the S of 0.03 % by weight.After mixing, in induction furnace, be heated to 1500～1520 degrees Celsius of lower meltings, obtain mixing molten iron; In described mixing molten iron, add wriggling of rare earth zinc-magnesium aluminium alloy 0.25Kg to process; The mixing molten iron of processing through wriggling is poured into a mould, to obtain piston crude product; The content of the piston crude product Medium pearlite obtaining is to be (40～60) with ferritic content ratio: (60～40).Further piston crude product is carried out to roughing, thermal treatment (quenching-temper) and precision work, to obtain compressor pump piston.
Embodiment 2
Prepare compressor pump piston, apolegamy melting raw material: the C of 1.6Kg, the Si of 1.0Kg; The Mn of 0.2g; The Cu of 0.5Kg and the iron of 47Kg, wherein contain the P of 0.3 % by weight, the S of 0.01 % by weight.After mixing, be heated to 1500～1520 degrees Celsius of lower meltings in induction furnace, obtain mixing molten iron; In described mixing molten iron, add wriggling of rare earth zinc-magnesium aluminium alloy 0.15Kg to process; The mixing molten iron of processing through wriggling is poured into a mould, to obtain piston crude product; The content of the piston crude product Medium pearlite obtaining is 80～85%.Further piston crude product is carried out to roughing, thermal treatment (quenching-temper) and precision work, to obtain compressor pump piston.
Embodiment 3 prepares compressor pump piston, apolegamy melting raw material: the C of 1.9Kg, the Si of 1.5Kg; The Mn of 0.5Kg; The Cu of 0.5Kg and the iron of 47Kg, wherein contain the P of 0.3 % by weight, the S of 0.06 % by weight.After mixing, in induction furnace, be heated to 1500～1520 degrees Celsius of lower meltings, obtain mixing molten iron; In described mixing molten iron, add wriggling of rare earth zinc-magnesium aluminium alloy 0.2Kg to process; The mixing molten iron of processing through wriggling is poured into a mould, to obtain piston crude product; In the piston crude product obtaining, ferritic content is 60～65%.Further piston crude product is carried out to roughing, thermal treatment (quenching-temper) and precision work, to obtain compressor pump piston.
Embodiment 4
Prepare compressor pump piston, apolegamy melting raw material: the C of 1.8Kg, the Si of 1.3Kg; The Mn of 0.3Kg; The Cu of 0.25Kg, the Cr of 0.3Kg; The iron of the Mo of 0.1Kg, the Ni of 0.1Kg and 47Kg, wherein contains the P of 0.3 % by weight, the S of 0.06 % by weight.After mixing, in induction furnace, be heated to 1500～1520 degrees Celsius of lower meltings, obtain mixing molten iron; In described mixing molten iron, add wriggling of rare earth zinc-magnesium aluminium alloy 0.2Kg to process; The mixing molten iron of processing through wriggling is poured into a mould, to obtain piston crude product.Further piston crude product is carried out to roughing, thermal treatment (quenching-temper) and precision work, to obtain compressor pump piston.
Embodiment 5
Prepare compressor pump piston, apolegamy melting raw material: by the C of 1.8Kg; The Si of 1.3Kg; The Mn of 0.2Kg; And the iron of 47Kg, wherein contain the P of 0.05 % by weight, the S of 0.03 % by weight.After mixing, in induction furnace, be heated to 1500～1520 degrees Celsius of lower meltings, obtain mixing molten iron; In described mixing molten iron, add wriggling of rare earth zinc-magnesium aluminium alloy 0.2Kg to process; The mixing molten iron of processing through wriggling is poured into a mould, to obtain piston crude product; Piston crude product is carried out to roughing, thermal treatment (quenching-temper) and precision work, to obtain compressor pump piston.
Comparative example 1
Prepare compressor pump piston, apolegamy melting raw material: the C of 1.6Kg, the Si of 1.0Kg; The Mn of 0.35Kg; The Cu of 0.5Kg and the iron of 47Kg, the P wherein containing is not higher than 0.3 % by weight, and S is not higher than 0.15 % by weight.After mixing, in induction furnace, be heated to 1520～1550 degrees Celsius of lower meltings, obtain mixing molten iron; In mixing molten iron, add the nucleating agent of 0.13Kg to breed, then mixing molten iron is poured into a mould, to obtain piston crude product; Piston crude product is carried out to roughing, thermal treatment (quenching-temper) and precision work, to obtain compressor pump piston.
Comparative example 2
Prepare compressor pump piston, apolegamy melting raw material: the C of 1.6Kg, the Si of 1.0Kg; The Mn of 0.35Kg; The Ni of 0.15Kg; The Cr of 0.38Kg; The Mo of 0.15Kg; And the iron of 47Kg, the P wherein containing is not higher than 0.3 % by weight, and S is not higher than 0.15 % by weight.After mixing, in induction furnace, be heated to 1560～1580 degrees Celsius of lower meltings, obtain mixing molten iron; In mixing molten iron, add the nucleating agent of 0.35Kg to breed, then mixing molten iron is poured into a mould, to obtain piston crude product; Piston crude product is carried out to roughing, thermal treatment (quenching-temper) and precision work, to obtain compressor pump piston.
Performance evaluation
The performance of the piston of 1, being prepared by above-described embodiment 1-5 and comparative example 1-2 is evaluated.The results are shown in Table 1.
Measurement of hardness: carry out measurement of hardness with reference to JIS Z2245
Elastic modulus detection: hang resonant method
Abrasion test: the abrasion test nitrogenize slide plate that to be standard ring by embodiment or comparative example method are made make with stainless steel on the vertical omnipotent friction wear testing machine of MM-W1A to the abrasion loss recording after grinding.
Table 1
As can be seen from the above table, vermicular cast iron piston prepared by embodiment 1-5 has higher Young's modulus, the piston that wear hardness is significantly prepared lower than comparative example 1-2.And the cost of the vermicular cast iron piston prepared of embodiment 1-5 is suitable, even lower with common gray iron piston prepared by comparative example 1-2.Contrast thus knownly, the performance of the vermicular cast iron piston that embodiment 1-5 prepares is obviously better than piston prepared by comparative example 1-2, and cost is lower.
2, the piston of being prepared by above-described embodiment 1-3 and comparative example 1-2 is applied to respectively in compressor.
Wear test after 500 hours compressor monomers are durable, result, vermicular cast iron piston prepared by embodiment 1-3 and the abrasion of slide plate tip are all less, substantially not obvious, and a little less than comparative example 2, piston prepared by comparative example 1 and the heavy wear of slide plate tip.The piston of embodiment 1 is installed with vermicular cast iron cylinder, the HT250 cylinder composition pump housing respectively, the apolegamy height gap of cylinder and piston can be reduced to 3 microns, and after tested, compared with the compressor of assembling with comparative example 2, performance can promote 3～4 points.
In the description of this specification sheets, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, to the schematic statement of above-mentioned term needn't for be identical embodiment or example.And, specific features, structure, material or the feature of description can one or more embodiment in office or example in suitable mode combination.In addition,, not conflicting in the situation that, those skilled in the art can carry out combination and combination by the feature of the different embodiment that describe in this specification sheets or example and different embodiment or example.
Although illustrated and described embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, amendment, replacement and modification.
Claims (12)
1. a compressor pump piston, is characterized in that, described piston is made up of vermicular cast iron, and described vermicular cast iron comprises:
The C of 3.2～3.8 % by weight; The Si of 2.0～3.0 % by weight; The Mn of 0.5～1 % by weight; Not higher than the Cu of 1.0 % by weight; Not higher than the P of 0.3 % by weight; Not higher than the S of 0.06 % by weight; And the iron of surplus.
2. compressor pump piston according to claim 1, is characterized in that, described vermicular cast iron also comprises: the Cr of 0.5～1.0 % by weight, the Ni of 0.1～0.5 % by weight and not higher than the Mo of 0.5 % by weight.
3. compressor pump piston according to claim 1, is characterized in that, the nodulizing rate of described vermicular cast iron is 40%～90%.
4. compressor pump piston according to claim 1, is characterized in that, the tensile strength of described vermicular cast iron is not less than 320MPa.
5. compressor pump piston according to claim 1, is characterized in that, the Young's modulus of described vermicular cast iron is not less than 145GPa.
6. a method of preparing compressor pump piston, is characterized in that, comprising:
Melting raw mixture is provided;
Described melting raw mixture is carried out to melting, to obtain mixing molten iron;
In described mixing molten iron, add wriggling of vermiculizer to process;
The mixing molten iron that wriggling described in process processed is poured into a mould, to obtain piston crude product; And
Described piston crude product is carried out to processing treatment, to obtain described compressor pump piston,
Wherein,
Described melting raw mixture comprises:
The C of 3.2～3.8 % by weight; The Si of 2.0～3.0 % by weight; The Mn of 0.5～1 % by weight; Not higher than the Cu of 1.0 % by weight; Not higher than the P of 0.3 % by weight; Not higher than the S of 0.06 % by weight; And the iron of surplus.
7. method according to claim 6, is characterized in that, described melting raw mixture also comprises: the Cr of 0.5～1.0 % by weight, the Ni of 0.1～0.5 % by weight and not higher than the Mo of 0.5 % by weight.
8. method according to claim 6, is characterized in that, described vermiculizer is rare earth zinc-magnesium aluminium alloy.
9. method according to claim 8, is characterized in that, the add-on of described rare earth zinc-magnesium aluminium alloy is 0.3～0.5 % by weight of described mixing molten iron.
10. method according to claim 6, is characterized in that, before described piston crude product is carried out to processing treatment, further comprises: to described quench-temper of piston crude product.
11. 1 kinds of compressors, is characterized in that, comprise the compressor pump piston described in claim 1-5 any one or the compressor pump piston being prepared by the method for preparing compressor pump piston described in claim 6-10 any one.
12. 1 kinds of refrigeration equipments, is characterized in that, comprise the compressor described in claim 11, and described refrigeration equipment is air-conditioning and/or refrigerator.
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| CN107488810A (en) * | 2017-08-28 | 2017-12-19 | 广东荻赛尔机械铸造股份有限公司 | cast iron and preparation method thereof |
| CN109371316A (en) * | 2018-12-20 | 2019-02-22 | 苏州石川制铁有限公司 | A kind of preparation method of compactedization casting |
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| CN113355495A (en) * | 2021-05-31 | 2021-09-07 | 东风商用车有限公司 | Conditioning vermicular graphite cast iron, conditioning method of vermicular graphite cast iron and application of conditioning method |
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| CN104404359A (en) * | 2014-10-20 | 2015-03-11 | 广东美芝制冷设备有限公司 | Compression mechanism, preparation method of compression mechanism, compressor and refrigeration device |
| CN104532117A (en) * | 2014-12-31 | 2015-04-22 | 铜陵市经纬流体科技有限公司 | High-temperature-resistant soft-seal sluice valve body and preparation method thereof |
| CN104561760A (en) * | 2014-12-31 | 2015-04-29 | 铜陵市经纬流体科技有限公司 | High-toughness soft-seal brake valve body and preparing method thereof |
| CN105349908A (en) * | 2015-10-26 | 2016-02-24 | 无锡市永亿精密铸造有限公司 | Precisely-casted bearing |
| CN105525193A (en) * | 2015-12-18 | 2016-04-27 | 张淑芬 | Novel cast iron alloy material for crankshaft |
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| CN107488810A (en) * | 2017-08-28 | 2017-12-19 | 广东荻赛尔机械铸造股份有限公司 | cast iron and preparation method thereof |
| US20190177821A1 (en) * | 2017-12-08 | 2019-06-13 | Hyundai Motor Company | High-strength gray cast iron |
| US10975458B2 (en) * | 2017-12-08 | 2021-04-13 | Hyundai Motor Company | High-strength gray cast iron |
| CN109371316A (en) * | 2018-12-20 | 2019-02-22 | 苏州石川制铁有限公司 | A kind of preparation method of compactedization casting |
| CN110066958A (en) * | 2019-04-30 | 2019-07-30 | 重庆新红旗缸盖制造有限公司 | A kind of chromiumcopper vermicular cast iron production technology |
| CN110066958B (en) * | 2019-04-30 | 2020-08-18 | 重庆新红旗缸盖制造有限公司 | Production process of copper-chromium alloy vermicular graphite cast iron |
| CN113355495A (en) * | 2021-05-31 | 2021-09-07 | 东风商用车有限公司 | Conditioning vermicular graphite cast iron, conditioning method of vermicular graphite cast iron and application of conditioning method |
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