CN103758746B - A kind of steel-bimetal copper-steel rotor and manufacture method thereof - Google Patents
A kind of steel-bimetal copper-steel rotor and manufacture method thereof Download PDFInfo
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- CN103758746B CN103758746B CN201410023147.2A CN201410023147A CN103758746B CN 103758746 B CN103758746 B CN 103758746B CN 201410023147 A CN201410023147 A CN 201410023147A CN 103758746 B CN103758746 B CN 103758746B
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Abstract
The invention belongs to metallurgical material field, particularly plunger hydraulic pump steel-bimetal copper-steel rotor and manufacture method thereof.A kind of steel-bimetal copper-steel rotor, this rotor matrix adopts steel or spheroidal graphite cast iron, and antifriction layer adopts self-lubricating abrasion-resistant Steel material, the chemical composition of self-lubricating abrasion-resistant antifriction layer material final products by quality % is: C:0.5-1, Cr:11-13, Ni:8-10, Mo:1.5-2.5, Cu:25-30, MoS
2: 3-9, nanometer α-Al
2o
3: 0.5-1.5, Fe surplus; This rotor is prepared by the following method: first prepare self-lubricating abrasion-resistant steel antifriction layer material: by plumbago, ferrochrome powder, molybdenum-iron powder, carbonyl nickel powder, molybdenum disulphide powder, nanometer α-Al
2o
3powder and Bond mix with iron powder, carry out suppressing and sintering; Carry out leaching copper again, obtained self-lubricating abrasion-resistant steel antifriction layer material; By above-mentioned self-lubricating abrasion-resistant steel antifriction layer material respectively on rotor flow face and plunger hole surface, prepare antifriction layer by diffusion welding craft, welding temperature is 1100 ~ 1150 DEG C, and weld interval is 1 ~ 2h.
Description
Technical field
The invention belongs to metallurgical material field, particularly plunger hydraulic pump steel-bimetal copper-steel rotor and manufacture method thereof.
Background technique
Plunger hydraulic pump is by plunger to-and-fro motion in rotor plunger cavity, changes plunger cavity volume, realizes oil suction and oil extraction.Because plunger pump has compact structure, rotating speed is high, and flow is large, and efficiency is high, and working pressure is large, easily realizes the advantages such as variable, is widely used in the field such as engineering machinery, lifting transport, metallurgy, boats and ships, Aero-Space.
Rotor is crucial friction pair and the heart component of plunger hydraulic pump, and as shown in Figure 1,1 is steel base, and 2 is self-lubricating abrasion-resistant steel antifriction layer.It subjects the chemical action of alternating stress, impulsive load, Surface Wear and medium, carries the function of power transmission, lubrication, sealing, and operating conditions is the most severe.The high speed of pump, high-pressure trend by making the wearing and tearing of crucial friction pair material, fatigue problem becomes more outstanding: surface of friction pair heats up rapidly at a high speed, under high pressure, the faster flow of surface of contact, softening, and adhesive wear and fatigue damage are aggravated; The stressed amplitude of friction pair and alternative frequency increase simultaneously, impel material premature failure.In new product development crucial friction pair rotor heavy wear or become by the fracture that causes of wearing and tearing the main cause that pump lost efficacy.Therefore, rotor is the key factor in restriction plunger pump life-span.
The material manufacturing cylinder block of hydraulic pumps has Cuprum alloy (mainly Si-Mn brass), iron-base powder metallurgy material, spheroidal graphite cast iron, bimetallic material etc.Wherein, adopt bimetal structure, namely material surface and material matrix respectively use different materials, the coupling so both meeting friction pair material requires the fatigue strength turn improving material, it is that a kind of friction subsurface performance (material pairing compatibility, antifriction quality, wear resistance) combines with body material mechanical property (intensity, toughness, anti-fatigue ability), solving the preferred embodiments of wearing and tearing and tired two fold problem, is the method for manufacturing rotor generally adopted.Bimetallic rotor structure is all adopt copper-steel structure both at home and abroad, and skin-material and antifriction layer material are all copper base alloys.
But existing copper-bimetal copper-steel rotor can not meet the requirement of a new generation's high speed, high pressure, high-volume hydraulic pump, particularly kerosene pump, and subject matter is:
1. the wear-resisting property of Cuprum alloy antifriction layer is limited.The maximum antifriction layer material of current use is cast tin bronze ZQSn10-2-3, as cast copper alloy, inevitably there is casting defect, if defect appears at working surface, the surface integrity in meeting destruction work face, the wear-resisting property of great reduction rotor wearing layer, makes product not reach predetermined life requirements.Compactness after Cuprum alloy casting affects its wear-resisting property, and therefore, its wear resistance is subject to the restriction of foundry engieering.And adopt the manufacture of overall Si-Mn brass, not only wear-resisting property is undesirable, and intensity is also inadequate, usually occurs that plug pulls phenomenon from ball-and-socket.Particularly when the hydraulic medium of plunger pump is converted to kerosene by chilli oil, just make bimetallic copper alloy layer produce sharp wear, even occur " shaving clearly " phenomenon (silver plating layer namely on bimetal and layers of copper are worn away entirely).The heavy wear of rotor end-face copper alloy layer, makes sealing surface be damaged, causes in pump and let out increase, and volumetric efficiency declines.If the abrasive dust that Cuprum alloy produces enters hydraulic system, then can destroy pump inner assembly, cause significant trouble, greatly reduce working life and the reliability of oil hydraulic pump.
2. the plunger hole of rotor coordinates with plunger, the material that this friction pair should not select heat distortion amount to differ greatly, and this point is particularly outstanding in the case of a high temperature.Copper-bimetal copper-steel rotor is due to thermal expansion coefficient difference, and heat distortion amount differs greatly, and easily occurs plunger locking, causes the parts such as the chuck in pump, piston shoes thoroughly twist off or break, makes the fault of systemic breakdown.If ensure the amount of deformation that the condition of high temperature is enough, normal temperature state rotor plunger hole and plunger excesssive gap will be caused, volumetric efficiency is reduced.Simultaneously due to the difference of heat distortion amount, rotor, in the process of heat-treating, easily cracks.
3. antifriction layer Cuprum alloy easily produces fatigue wear, makes copper transfer in steel base, and producing sticky copper, is also " cold welding " phenomenon, affects friction pair and runs well.
4. the fusing point due to Cuprum alloy is low, and diffusion welding temperature is restricted, and adds low (such as, the σ of ZQSn10-2-3 of the intensity of Cuprum alloy itself
bfor 245MPa), therefore, the adhesive strength of copper-bimetal copper-steel friction pair is low, often occurs the situation that end face copper alloy layer comes off and plunger hole copper alloy layer is drawn out.
So far, adopt antifriction, wear-resisting, inadhesion, weldability antifriction layer material that is good, that can adapt to heat treatment requirements manufactures bimetallic rotor has become the key improving plunger hydraulic pump life and reliability.
Summary of the invention
The object of this invention is to provide a kind of bimetallic rotor of steel-steel structure, its antifriction layer has good selflubricating, wear-resisting, resistance to adhesive performance, can meet the performance requirement of plunger hydraulic pump of new generation.
Another object of the present invention is to provide a kind of manufacture method of bimetallic rotor of steel-steel structure.
The object of the invention is to be achieved through the following technical solutions:
A kind of steel-bimetal copper-steel rotor, for plunger hydraulic pump, this rotor matrix adopts steel or spheroidal graphite cast iron, antifriction layer adopts self-lubricating abrasion-resistant Steel material, and the chemical composition of self-lubricating abrasion-resistant antifriction layer material final products by quality % is: C:0.5-1, Cr:11-13, Ni:8-10, Mo:1.5-2.5, Cu:25-30, MoS
2: 3-9, nanometer α-Al
2o
3: 0.5-1.5, Fe surplus;
This rotor is prepared by the following method: first prepare self-lubricating abrasion-resistant steel antifriction layer material: by plumbago, ferrochrome powder, molybdenum-iron powder, carbonyl nickel powder, molybdenum disulphide powder, nanometer α-Al
2o
3powder and Bond mix with iron powder, carry out suppressing and sintering; Carry out leaching copper again, obtained self-lubricating abrasion-resistant steel antifriction layer material; By above-mentioned self-lubricating abrasion-resistant steel antifriction layer material respectively on rotor flow face and plunger hole surface, prepare antifriction layer by diffusion welding craft, welding temperature is 1100 ~ 1150 DEG C, and weld interval is 1 ~ 2h.
The technique preparing self-lubricating abrasion-resistant steel antifriction layer material is: mixed powder is added Bond, the addition of Bond is the 1-2% of all the other mixed powder gross weights, raw material incorporation time is 1-2h, load after mixing in punching block, suppress on a hydraulic press, pressing pressure is 400-600MPa, then pressed compact is loaded and burn boat, sinter in hydrogen cleaning stove or vacuum furnace, sintering temperature is 1100-1150 DEG C, sintering time is 1-2h, obtained agglomerated material carries out leaching copper in hydrogen cleaning stove or vacuum furnace, leaching copper temperature is 1100-1150 DEG C, the leaching copper time is 1-2h.
Described Bond is any one or more in zine stearate, lithium stearate, paraffin, resin.
A preparation method for steel-bimetal copper-steel rotor, sequentially comprises the following steps:
A. self-lubricating abrasion-resistant steel antifriction layer material is first prepared: by plumbago, ferrochrome powder, molybdenum-iron powder, carbonyl nickel powder, molybdenum disulphide powder, nanometer α-Al
2o
3powder and Bond mix with iron powder, carry out suppressing and sintering; Carry out leaching copper again, obtained self-lubricating abrasion-resistant steel antifriction layer material; The chemical composition obtaining self-lubricating abrasion-resistant antifriction layer material final products by quality % is: C:0.5-1, Cr:11-13, Ni:8-10, Mo:1.5-2.5, Cu:25-30, MoS
2: 3-9, nanometer α-Al
2o
3: 0.5-1.5, Fe surplus;
B. by above-mentioned self-lubricating abrasion-resistant steel antifriction layer material respectively rotor flow face and plunger hole surface, prepare antifriction layer by diffusion welding craft, welding temperature is 1100 ~ 1150 DEG C, and weld interval is 1 ~ 2h.
In described step a, the addition of Bond is the 1-2% of all the other mixed powder gross weights, and raw material incorporation time is 1-2h; Load in punching block after mixing, suppress on a hydraulic press, pressing pressure is 400-600MPa, and then loaded by pressed compact and burn boat, sinter in hydrogen cleaning stove or vacuum furnace, sintering temperature is 1100-1150 DEG C, and sintering time is 1-2h; Obtained agglomerated material carries out leaching copper in hydrogen cleaning stove or vacuum furnace, and leaching copper temperature is 1100-1150 DEG C, and the leaching copper time is 1-2h, final obtained self-lubricating abrasion-resistant steel antifriction layer material.
In described step b, the antifriction layer preparing rotor flow face adopts following technique: adopt self-lubricating abrasion-resistant Steel material to prepare antifriction laminate, the flow of rotor matrix is faced down, be placed on antifriction laminate, solder is placed between antifriction laminate and rotor matrix flow face, rely on the deadweight of rotor matrix, under hydrogen cleaning or vacuum atmosphere, carry out pressurization diffusion welding, obtained bimetallic rotor flow face.
Described Bond is any one or more in zine stearate, lithium stearate, paraffin, resin.
Prepare in the process of rotor flow face, the solder trade mark is Cu-10Sn-20Ni.
Prepare in the process of rotor flow face, diffusion welding adopts excessive liquid phase diffusion welding technique to carry out, and welding temperature is 1100 ~ 1150 DEG C, and weld interval is 1 ~ 2h.
In described step b, the antifriction layer preparing rotor plunger hole adopts following technique: adopt self-lubricating abrasion-resistant Steel material to prepare antifriction layer pipe, by antifriction layer pipe with in interference fit form press-in rotor plunger hole, at the upper ends solder of antifriction layer pipe, diffusion welding is carried out, obtained bimetallic rotor plunger hole under hydrogen cleaning or vacuum atmosphere.
Prepare in rotor plunger hole process, the trade mark of solder is GY-1.
Prepare in rotor plunger hole process, welding temperature is 1100 ~ 1150 DEG C, and weld interval is 1 ~ 2h.
Beneficial effect of the present invention is:
Steel of the present invention-bimetal copper-steel rotor has following characteristics:
1. antifriction layer is wear-resistant.Owing to having the wear-resistant component not available for Cuprum alloy in antifriction layer material, as the abrasion resistance alloy that Mo, Cr, C etc. are formed with Fe, and improve its density and intensity by oozing copper, by adding MoS
2improve its greasy property, by adding nanometer α-Al
2o
3improve its hardness, therefore its wear resistance is better than Cuprum alloy.
2. antifriction layer inadhesion.Owing to containing self-lubricating substances in self-lubricating abrasion-resistant steel antifriction layer material, particularly containing nanometer α-Al
2o
3, therefore, the generation of adhering can be prevented.In dry grinding test, just there is serious adhesion less than 1 minute in the test of silicomanganese brass, to mill material surface yellowing; And the generation that 1 hour does not have material transfer yet tested by self-lubricating abrasion-resistant steel, illustrate that this antifriction layer material has good antisticking performance.
3. plunger and plunger hole locking is prevented.Because self-lubricating abrasion-resistant steel antifriction layer material possesses the basic chemical element of steel, antifriction layer with belong to material of the same type to grinding steel, thermal expansion coefficient is substantially identical, which solves the contradiction that different kind of material thermal distortion is not identical, prevents the fault of plunger locking from occurring.
4. bimetal adhesive strength is high.
Copper-bimetal copper-steel structure can not adopt welding consumables, and welding temperature can not more than 850 DEG C,
Weld strength is low; Steel-bimetal copper-steel structure then can adopt welding consumables, and allows the welding temperature of more than 1100 DEG C, and ensure that antifriction layer is connected with the high-performance of steel base, weld strength is high.
5. heat treatment performance is good.
Self-lubricating abrasion-resistant steel antifriction layer material has the fundamental property of steel, is applicable to heat-treating together with all kinds of steel.Self-lubricating abrasion-resistant steel differs little with steel base thermal distortion, and adhesive strength is high, and heat treatment process antifriction layer such as can not to crack at the defect.
6. antifriction layer hardness is high.
Copper-radicle antifriction layer material only possesses Brinell hardness, easily enters in Cuprum alloy in abrasive process abrasive sand; Self-lubricating abrasion-resistant steel then has the Rockwell hardness of more than HRC20, can prevent entering of abrasive sand, also the wear-resisting property of favourable raising friction pair material.
Accompanying drawing explanation
Fig. 1: steel of the prior art of the present invention-bimetal copper-steel rotor blank structural representation.
Embodiment
Below in conjunction with embodiment, the specific embodiment of the present invention is described in further detail.
Rotor matrix adopts steel or spheroidal graphite cast iron, and antifriction layer adopts self-lubricating abrasion-resistant Steel material.The chemical composition % by weight of self-lubricating abrasion-resistant antifriction layer material is: C0.5-1, Cr11-13, Ni8-10, Mo1.5-2.5, Cu25-30, MoS
23-9, nanometer α-Al
2o
30.5-1.5, Fe surplus.
First self-lubricating abrasion-resistant steel antifriction layer material is prepared: by plumbago, ferrochrome powder, molybdenum-iron powder, carbonyl nickel powder, molybdenum disulphide powder, nanometer α-Al
2o
3powder and Bond mix with iron powder, carry out suppressing and sintering; Carry out leaching copper again, obtained self-lubricating abrasion-resistant steel antifriction layer material.The addition of Bond is 1-2%.In above-mentioned raw materials, Bond is any one or more in zine stearate, lithium stearate, paraffin, resin.Raw material incorporation time is 1-2h.Load in punching block after mixing, suppress on a hydraulic press, pressing pressure is 400-600MPa, and then loaded by pressed compact and burn boat, sinter in hydrogen cleaning stove or vacuum furnace, sintering temperature is 1100-1150 DEG C, and sintering time is 1-2h.Obtained agglomerated material carries out leaching copper in hydrogen cleaning stove or vacuum furnace, and leaching copper temperature is 1100-1150 DEG C, and the leaching copper time is 1-2h, final obtained self-lubricating abrasion-resistant steel antifriction layer material.
According to the size in rotor flow face, self-lubricating abrasion-resistant Steel material is adopted to prepare antifriction laminate, the flow of rotor matrix is faced down, be placed on antifriction laminate, between antifriction laminate and rotor matrix flow face, place homemade solder, the solder trade mark is Cu-10Sn-20Ni, relies on the deadweight of rotor matrix, pressurization diffusion welding is carried out, obtained bimetallic rotor flow face under hydrogen cleaning or vacuum atmosphere.Diffusion welding adopts excessive liquid phase diffusion welding technique to carry out, and welding temperature is 1100 ~ 1150 DEG C, and weld interval is 1 ~ 2h.This diffusion welding principle is, when solder is heated to welding temperature, solder melts, between face of weld, form liquid film, solder, element phase interdiffusion between antifriction layer alloy with parent metal, form mesosphere alloy, in insulating process subsequently, mesosphere alloying constituent changes, and fusing point improves, thus produces isothermal solidification under welding temperature; Continue insulation diffusion, joint microstructure and composition and the further homogenization of matrix, finally realize the high-performance connection of joint.
According to rotor plunger hole size, self-lubricating abrasion-resistant Steel material is adopted to prepare antifriction layer pipe, by antifriction layer pipe with in interference fit form press-in rotor plunger hole, at the homemade solder of the upper ends of antifriction layer pipe, the trade mark of solder is GY-1, under hydrogen cleaning or vacuum atmosphere, carry out diffusion welding, and welding temperature is 1100 ~ 1150 DEG C, weld interval is 1 ~ 2h, obtained bimetallic rotor plunger hole.The principle of this diffusion welding is, when solder is heated to welding temperature, solder fusing, by capillarity, solder is distributed between matrix and antifriction layer from top to bottom, and form liquid film, solder, element phase interdiffusion between antifriction layer alloy with parent metal, form mesosphere alloy, in insulating process subsequently, mesosphere alloying constituent changes, and fusing point improves, thus produces isothermal solidification under welding temperature; Continue insulation diffusion, joint microstructure and composition and the further homogenization of matrix, finally realize the high-performance connection of joint.
Embodiment:
Adopt bimetal manufacturing process of the present invention, obtained welded specimen 6 batches.Table 1 is for preparing welded specimen material therefor, and table 2 is for preparing process parameter and the welding performance of welded specimen.For contrasting, table 2 lists the weld strength of Cu-steel diffusion welding bimetallic material.
Welded specimen material therefor prepared by table 1
| Lot number | Antifriction layer material | Body material | Welding consumables |
| 1 | Self-lubricating abrasion-resistant steel antifriction layer material | 40CrNiMoA | Cu-10Sn-20Ni |
| 2 | Self-lubricating abrasion-resistant steel antifriction layer material | 40CrNiMoA | Cu-10Sn-20Ni |
| 3 | Self-lubricating abrasion-resistant steel antifriction layer material | 40CrNiMoA | Cu-10Sn-20Ni |
| 4 | Self-lubricating abrasion-resistant steel antifriction layer material | 40CrNiMoA | GY-1 |
| 5 | Self-lubricating abrasion-resistant steel antifriction layer material | 40CrNiMoA | GY-1 |
| 6 | Self-lubricating abrasion-resistant steel antifriction layer material | 40CrNiMoA | GY-1 |
Table 2 prepares process parameter and the welding performance of welded specimen
Adopt the process parameter of lot number 3 in the antifriction layer material in above-mentioned table 1, body material and welding consumables and table 2, according to manufacturing process of the present invention, obtained steel-bimetal copper-steel rotor blank, machined, make steel-bimetal copper-steel rotor finished product, loading coal fluid press pump carries out life assessment test.Test conditions: rated speed 4000rpm; Working medium RP-3 jet fuel; Working pressure 24MPa, medium temperature-40 DEG C ~+135 DEG C, test period 1000h.As compared to metallic rotator finished product of the prior art (table 2, lot number 7), test result shows, steel-bimetal copper-steel rotor bimetal combines firmly, antifriction layer, without visual appreciable wear, occurs without adherent phenomenon, can meet the usability requirement of kerosene oil hydraulic pump to rotor.
Claims (12)
1. steel-bimetal copper-steel rotor, for plunger hydraulic pump, it is characterized in that: this rotor matrix adopts steel or spheroidal graphite cast iron, antifriction layer adopts self-lubricating abrasion-resistant Steel material, and the chemical composition of self-lubricating abrasion-resistant steel antifriction layer material final products by quality % is: C:0.5-1, Cr:11-13, Ni:8-10, Mo:1.5-2.5, Cu:25-30, MoS
2: 3-9, nanometer α-Al
2o
3: 0.5-1.5, Fe surplus;
This rotor is prepared by the following method: first prepare self-lubricating abrasion-resistant steel antifriction layer material: by plumbago, ferrochrome powder, molybdenum-iron powder, carbonyl nickel powder, molybdenum disulphide powder, nanometer α-Al
2o
3powder and Bond mix with iron powder, carry out suppressing and sintering; Carry out leaching copper again, obtained self-lubricating abrasion-resistant steel antifriction layer material; Above-mentioned self-lubricating abrasion-resistant steel antifriction layer material is placed on respectively rotor flow face and plunger hole surface, prepare antifriction layer by diffusion welding craft, welding temperature is 1100 ~ 1150 DEG C, and weld interval is 1 ~ 2h.
2. steel according to claim 1-bimetal copper-steel rotor, it is characterized in that: the technique preparing self-lubricating abrasion-resistant steel antifriction layer material is: mixed powder is added Bond, the addition of Bond is the 1-2% of all the other mixed powder gross weights, raw material incorporation time is 1-2h, load after mixing in punching block, suppress on a hydraulic press, pressing pressure is 400-600MPa, then pressed compact is loaded and burn boat, sinter in hydrogen cleaning stove or vacuum furnace, sintering temperature is 1100-1150 DEG C, sintering time is 1-2h, obtained agglomerated material carries out leaching copper in hydrogen cleaning stove or vacuum furnace, leaching copper temperature is 1100-1150 DEG C, the leaching copper time is 1-2h.
3. steel according to claim 1-bimetal copper-steel rotor, is characterized in that: described Bond is any one or more in zine stearate, lithium stearate, paraffin, resin.
4. a preparation method for steel as claimed in claim 1-bimetal copper-steel rotor, is characterized in that: sequentially comprise the following steps:
A. self-lubricating abrasion-resistant steel antifriction layer material is first prepared: by plumbago, ferrochrome powder, molybdenum-iron powder, carbonyl nickel powder, molybdenum disulphide powder, nanometer α-Al
2o
3powder and Bond mix with iron powder, carry out suppressing and sintering; Carry out leaching copper again, obtained self-lubricating abrasion-resistant steel antifriction layer material; The chemical composition obtaining self-lubricating abrasion-resistant steel antifriction layer material final products by quality % is: C:0.5-1, Cr:11-13, Ni:8-10, Mo:1.5-2.5, Cu:25-30, MoS
2: 3-9, nanometer α-Al
2o
3: 0.5-1.5, Fe surplus;
B. above-mentioned self-lubricating abrasion-resistant steel antifriction layer material is placed on respectively rotor flow face and plunger hole surface, prepare antifriction layer by diffusion welding craft, welding temperature is 1100 ~ 1150 DEG C, and weld interval is 1 ~ 2h.
5. the preparation method of steel according to claim 4-bimetal copper-steel rotor, it is characterized in that: in described step a, the addition of Bond is the 1-2% of all the other mixed powder gross weights, raw material incorporation time is 1-2h; Load in punching block after mixing, suppress on a hydraulic press, pressing pressure is 400-600MPa, and then loaded by pressed compact and burn boat, sinter in hydrogen cleaning stove or vacuum furnace, sintering temperature is 1100-1150 DEG C, and sintering time is 1-2h; Obtained agglomerated material carries out leaching copper in hydrogen cleaning stove or vacuum furnace, and leaching copper temperature is 1100-1150 DEG C, and the leaching copper time is 1-2h, final obtained self-lubricating abrasion-resistant steel antifriction layer material.
6. the preparation method of steel according to claim 4-bimetal copper-steel rotor, it is characterized in that: in described step b, the antifriction layer preparing rotor flow face adopts following technique: adopt self-lubricating abrasion-resistant Steel material to prepare antifriction laminate, the flow of rotor matrix is faced down, be placed on antifriction laminate, between antifriction laminate and rotor matrix flow face, place solder, rely on the deadweight of rotor matrix, pressurization diffusion welding is carried out, obtained bimetallic rotor flow face under hydrogen cleaning or vacuum atmosphere.
7. the preparation method of steel according to claim 4-bimetal copper-steel rotor, is characterized in that: described Bond is any one or more in zine stearate, lithium stearate, paraffin, resin.
8. the preparation method of steel according to claim 6-bimetal copper-steel rotor, is characterized in that: prepare in the process of rotor flow face, the solder trade mark is Cu-10Sn-20Ni.
9. the preparation method of steel according to claim 6-bimetal copper-steel rotor, is characterized in that: prepare in the process of rotor flow face, diffusion welding adopts excessive liquid phase diffusion welding technique to carry out, and welding temperature is 1100 ~ 1150 DEG C, and weld interval is 1 ~ 2h.
10. the preparation method of steel according to claim 4-bimetal copper-steel rotor, it is characterized in that: in described step b, the antifriction layer preparing rotor plunger hole adopts following technique: adopt self-lubricating abrasion-resistant Steel material to prepare antifriction layer pipe, by antifriction layer pipe with in interference fit form press-in rotor plunger hole, at the upper ends solder of antifriction layer pipe, diffusion welding is carried out, obtained bimetallic rotor plunger hole under hydrogen cleaning or vacuum atmosphere.
The preparation method of 11. steel according to claim 10-bimetal copper-steel rotors, is characterized in that: prepare in rotor plunger hole process, and the trade mark of solder is GY-1.
The preparation method of 12. steel according to claim 10-bimetal copper-steel rotors, is characterized in that: prepare in rotor plunger hole process, welding temperature is 1100 ~ 1150 DEG C, and weld interval is 1 ~ 2h.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106278114A (en) * | 2016-08-11 | 2017-01-04 | 芜湖东新磁电有限公司 | A kind of rotor magnetic steel rotor material and preparation method thereof |
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