CN103611925A - Powder metallurgy formula of full-hydraulic steering gear stator and rotor pair and manufacturing process - Google Patents
Powder metallurgy formula of full-hydraulic steering gear stator and rotor pair and manufacturing process Download PDFInfo
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- CN103611925A CN103611925A CN201310512386.XA CN201310512386A CN103611925A CN 103611925 A CN103611925 A CN 103611925A CN 201310512386 A CN201310512386 A CN 201310512386A CN 103611925 A CN103611925 A CN 103611925A
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Abstract
The invention discloses a powder metallurgy formula of a full-hydraulic steering gear stator and rotor pair. The powder metallurgy formula is characterized in that the powder metallurgy formula comprises, by weight, 90.5% to 94.5% of atomized iron powder, 0.6% to 1.2% of aquadag, 1.0% to 4.0% of electrolytic copper, 0.8% to 2.0% of nickel powder, 0.5% to 2.0% of molybdenum powder, 0.2% to 0.5% of chromium powder, 0.1% to 0.6% of manganese sulfide, 0.3% to 0.7% of micronized wax and balance spindle oil, wherein every 100kg of the powder metallurgy formula contains 5mL to 30mL of spindle oil. The invention further discloses a powder metallurgy manufacturing process of the full-hydraulic steering gear stator and rotor pair. The powder metallurgy manufacturing process includes the dosing step, the powder stirring step, the pressing and forming step, the sintering and alloying step, the shaping and shape correcting step, the machining step, the steam processing step and other steps. By means of the powder metallurgy formula and the manufacturing process, the effects of being scientific in material composition proportion, good in wear resistance, not prone to abrasion, high in machining efficiency, material utilization rate and machining accuracy, good in rust protection performance and the like are achieved, and the market requirements can be completely met.
Description
Technical field
The present invention relates to a kind of powder metallurgy prescription, be specifically related to a kind of powder metallurgy prescription of all-hydraulic steering gear stator-rotator pair, the invention still further relates to the powder metallurgy manufacturing process of all-hydraulic steering gear stator-rotator pair, the invention belongs to powder metallurgical technology.
Background technology
All-hydraulic steering gear stator-rotator pair is for automobile engine, and its shape and structure as shown in Figure 1.The rotor of existing all-hydraulic steering gear stator-rotator pair and stator are normally made by the mach method of steel.The shortcoming such as it exists material composition to fix, wear no resistance, working (machining) efficiency is low, stock utilization is low, machining accuracy is low, rustless property is poor, can not meet market demands.
Summary of the invention
For solving the deficiencies in the prior art, the object of the present invention is to provide a kind of powder metallurgy prescription and manufacturing process of all-hydraulic steering gear stator-rotator pair.
In order to realize above-mentioned target, the present invention adopts following technical scheme:
The powder metallurgy prescription of all-hydraulic steering gear stator-rotator pair, it is characterized in that, adopt the following component of percetage by weight: 90.5-94.5% atomized iron powder, 0.6-1.2% aquadag, 1.0-4.0% cathode copper, 0.8-2.0% nickel powder, 0.5-2.0% molybdenum powder, 0.2-0.5% chromium powder, 0.1-0.6% manganese sulfide, 0.3-0.7% micro mist wax and 5-30mL bobbin oil/100kg.
The powder metallurgy manufacture craft of aforementioned all-hydraulic steering gear stator-rotator pair, is characterized in that, comprises the following steps:
(1) batching: prepare burden according to described formula;
(2) flour stirring: stir 30-60 minute by pouring flour stirring machine after raw material accurate weighing into, pour out the rear cooling next process that carries out;
(3) compressing: the raw material being stirred is packed into the hopper of powder metallurgy press, raw material enters die cavity along duff pipe, start the compacting of tune machine;
(4) sintered alloy: the product after compacting is placed on net belt type sintering furnace net belt, moves along guipure, and from dewaxing district to ，Zai Dao cooling zone, sintering zone, then product out;
(5) shape is corrected in shaping: the Special shaping mould designing is arranged on shaping press, by putting into shaping die cavity after the product immersion oil of sintering, carries out shaping;
(6) machined: by drawing, stator rotor is carried out to turning, chamfering, polishing or deburring, reach finished figure requirement;
(7) steam treatment: will carry out steam treatment after stator cleaning, drying, then immersion oil packing; Rotor is without steam treatment, and directly immersion oil is packed.
The powder metallurgy manufacture craft of aforesaid all-hydraulic steering gear stator-rotator pair, is characterized in that, in described step (4), the sintering velocity of stator is 55-65mm/min, and the sintering velocity of rotor is 75-85mm/min.
The powder metallurgy manufacture craft of aforesaid all-hydraulic steering gear stator-rotator pair, it is characterized in that, described step (4) comprising: described sintering zone is successively by sintering one district, sintering 2nd district, sintering 3rd district, sintering 4th district, sintering 5th district, sintering 6th district form, sintering temperature in sintering zone: sintering one district 560-620 ℃, sintering two district 650-760 ℃, sintering three district 850-960 ℃, sintering four district 1100-1115 ℃, sintering five district 1115-1120 ℃, sintering six district 1105-1140 ℃, product enters sintering zone from sintering one district, and from sintering, sintering zone is left in 6th district.
The powder metallurgy manufacture craft of aforesaid all-hydraulic steering gear stator-rotator pair, it is characterized in that, described step (4) comprising: cooling zone consists of a cooling district and cooling 2nd district successively, product enters cooling zone from a cooling district, from cooling 2nd district, leave cooling zone, a cooling district water temperature 40-80 ℃, cooling two district water temperature 30-50 ℃.
The powder metallurgy manufacture craft of aforesaid all-hydraulic steering gear stator-rotator pair, is characterized in that, described step (4) comprising: body of heater nitrogen 3.5-4m
3/ h, decomposition ammonia 0.2-0.6m
3/ h, decomposition propane flammable gas 0.02-0.12m
3/ h, cooling zone nitrogen 1.5-3m
3/ h, decomposition ammonia 0.05-0.12m
3/ h, stove tail nitrogen 2.5-4m
3/ h.
The powder metallurgy manufacture craft of aforesaid all-hydraulic steering gear stator-rotator pair, is characterized in that, described step (4) comprising: the sintering velocity of stator is 55-65mm/min, and rotor is 75-85mm/min.
The powder metallurgy manufacture craft of aforesaid all-hydraulic steering gear stator-rotator pair, is characterized in that, described step comprises: the temperature of steam treatment is 530-580 ℃, time 1.5-4 hour.
The powder metallurgy manufacture craft of aforesaid all-hydraulic steering gear stator-rotator pair, is characterized in that, described step (7) comprising: stator and rotor are all immersed in R407 oil.
Usefulness of the present invention is: the present invention is by carrying out powder metallurgy manufacture by all-hydraulic steering gear stator-rotator pair, realized material composition proportioning science, wearability is good, easy to wear, working (machining) efficiency is high, stock utilization is high, machining accuracy is high, good antirust property texts, can meet market demands completely.
Accompanying drawing explanation
Fig. 1 is the structural representation of all-hydraulic steering gear stator-rotator pair of the present invention.
The implication of Reference numeral in figure:
1, rotor, 2, stator.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is done to concrete introduction, but the present invention is not limited by following examples.
Embodiment mono-:
(1) flour stirring
According to the particular characteristic of product needed, on purpose add various metals and nonmetalloid, make its finished product can reach the mechanical performance of expection.This product requirement dimensional accuracy is high, good toughness, good stability of the dimension, wearability strong, good antirust property.We adopt formula to be: 94.5% atomized iron powder, 0.6% aquadag, 1% cathode copper, 1.7% nickel powder, 0.5% molybdenum powder, 0.4% chromium powder, 0.6% manganese sulfide, 0.7% micro mist wax and 5 milliliters of bobbin oil/100 kilogram.
By pouring special-purpose flour stirring machine after raw material accurate weighing into, stir 30-60 minute, pour out and just can carry out next process in latter cooling 1 hour later.
(2) compressing
The stator designing 2 compacting tool sets are arranged on 300 tons of powder metallurgy mechanical type press, then pack the raw material being stirred into hopper, raw material enters die cavity along duff pipe, starts the compacting of tune machine.Density is controlled at 6.95-7.25g/cm
3.Highly control 16.3-16.5mm.
The rotor compacting tool set designing is arranged on 100 tons of powder metallurgy mechanical type press, then packs the raw material being stirred into hopper, raw material enters die cavity along duff pipe, starts the compacting of tune machine.Density is controlled at 6.95-7.25g/cm
3.Highly control 16.3-16.5mm.
(3) sintered alloy
Utilize powder metallurgy private network belt sintering stove sintering, product is placed on guipure, along guipure, move, from dewaxing district to ，Zai Dao cooling zone, sintering zone, then product out.Sintering zone is successively by sintering one district, sintering 2nd district, and sintering 3rd district, sintering 4th district, sintering 5th district, sintering 6th district form.Sintering temperature in sintering zone: sintering one district 560-620 ℃, sintering two district 650-760 ℃, sintering three district 850-960 ℃, sintering four district 1100-1115 ℃, sintering five district 1115-1120 ℃, sintering six district 1105-1140 ℃, product enters sintering zone from sintering one district, and from sintering, sintering zone is left in 6th district.Cooling zone consists of a cooling district and cooling 2nd district successively, and product enters cooling zone from a cooling district, from cooling 2nd district, leaves cooling zone.A cooling district water temperature 40-80 ℃, cooling two district water temperature 30-50 ℃.Atmosphere is controlled: body of heater nitrogen 3.5-4m
3/ h, decomposition ammonia 0.2-0.6m
3/ h, decomposition propane flammable gas 0.02-0.12m
3/ h, cooling zone nitrogen 1.5-3m
3/ h, decomposition ammonia 0.05-0.12m
3/ h, stove tail nitrogen 2.5-4m
3/ h.Sintering velocity stator 2 is 55-65mm/min, and rotor 1 is 75-85mm/min.After sintering, hardness reaches HRB70-90, and content of pearlite in alloy is more than 60%, and cementite is below 5%.
(4) shape is corrected in shaping
The stator designing 2 shaping moulds are arranged on 315 tons of hydraulic presses, by putting into shaping die cavity after the stator of sintering 2 immersion oil, carry out shaping.Again the rotor designing 1 shaping mould is arranged on 100 tons of hydraulic presses, by putting into shaping die cavity after the rotor of sintering 1 immersion oil, carries out shaping.Stator 2 rotors 1 are guaranteed bottom clearance 0.05-0.08mm after shaping respectively, and go slick, shaping rear surface Glabrous thorn.
(5) machined
By customer drawings, stator 2 is carried out to machined, difference face work, outer diameter chamfering, car cannelure is to drawing size, guarantees product thickness 16.1-16.2mm, and end face is to hole perpendicularity below 0.015, mill both ends of the surface guarantee product thickness 16-16.02mm, use burr brushing machine deburring.
By customer drawings, rotor 1 is carried out to machined, difference face work, internal diameter chamfering, guarantees product thickness 16.1-16.2mm, and end face is to hole perpendicularity below 0.015, and mill both ends of the surface guarantee product thickness 15.975-15.985mm, use burr brushing machine deburring.
(6) steam treatment
To after stator cleaning, drying, with steam treatment stove, carry out steam treatment, temperature 530-580 ℃, time 1.5-4 hour.After steam treatment, guarantee that product colour is consistent, without piebald, hardness reaches HRB90-120.
Then immersion oil is packed.Rotor is without steam treatment, and directly immersion oil is packed.As preferably, stator and rotor are all immersed in R407 oil.
The product that the present embodiment is produced as shown in Figure 1.The product as shown in Figure 1 making with the mach method of steel contrasts, the powder metallurgy of the present embodiment calculates by science, the special elements such as copper, nickel, molybdenum, manganese sulfide have been added, improved product mechanical performance, the wearability of goods, compression and tensile strength, rate elongation etc. have all been significantly improved.Added in addition this metallic element of chromium, the rustless property of product is strengthened greatly, optimized the material composition proportioning of product, greatly strengthened the service life of product, through bench test in 2000 hours, 45# fret wear 0.035-0.05mm, powder metallurgy stator rotor wearing and tearing 0.015mm-0.025mm, wearability obviously improves, through rustless property test, added after chromium, the antirust ability of product is significantly improved.The present invention does not add sulphur, because research discovery, the interpolation of sulphur can increase the wearing and tearing of product, affects service life.Adopting powder metallurgical technique, is the anti-wear performance that utilizes powder metallurgy, has improved the anti-wear performance of rotor product.
Adding after testing the coupon tensile strength of doing after alloying element is 817MPa, be greater than that 45 steel tensile strength (600Mpa) 35% left and right, bottom clearance dwindle 0.04mm left and right, wearability increases, three kinds of factor actings in conjunction impel that all-hydraulic steering gear security performance increases, extend service life.
Embodiment bis-:
(1) flour stirring
According to the particular characteristic of product needed, on purpose add various metals and nonmetalloid, make its finished product can reach the mechanical performance of expection.This product requirement dimensional accuracy is high, good toughness, good stability of the dimension, wearability strong, good antirust property.We adopt formula to be: 90.5% atomized iron powder, 1.2% aquadag, 2.6% cathode copper, 2.0% nickel powder, 2.0% molybdenum powder, 0.5% chromium powder, 0.5% manganese sulfide, 0.7% micro mist wax and 30 milliliters of bobbin oil/100 kilogram.
By pouring special-purpose flour stirring machine after raw material accurate weighing into, stir 30-60 minute, pour out and just can carry out next process in latter cooling 1 hour later.
(2) compressing
The stator compacting tool set designing is arranged on 300 tons of powder metallurgy mechanical type press, then packs the raw material being stirred into hopper, raw material enters die cavity along duff pipe, starts the compacting of tune machine.Density is controlled at 6.95-7.25g/cm
3.Highly control 16.3-16.5mm.
The rotor compacting tool set designing is arranged on 100 tons of powder metallurgy mechanical type press, then packs the raw material being stirred into hopper, raw material enters die cavity along duff pipe, starts the compacting of tune machine.Density is controlled at 6.95-7.25g/cm
3.Highly control 16.3-16.5mm.
(3) sintered alloy
Utilize powder metallurgy private network belt sintering stove sintering, product is placed on guipure, along guipure, move, from dewaxing district to ，Zai Dao cooling zone, sintering zone, then product out.Sintering zone is successively by sintering one district, sintering 2nd district, and sintering 3rd district, sintering 4th district, sintering 5th district, sintering 6th district form.Sintering temperature in sintering zone: sintering one district 560-620 ℃, sintering two district 650-760 ℃, sintering three district 850-960 ℃, sintering four district 1100-1115 ℃, sintering five district 1115-1120 ℃, sintering six district 1105-1140 ℃, product enters sintering zone from sintering one district, and from sintering, sintering zone is left in 6th district.Cooling zone consists of a cooling district and cooling 2nd district successively, and product enters cooling zone from a cooling district, from cooling 2nd district, leaves cooling zone.A cooling district water temperature 40-80 ℃, cooling two district water temperature 30-50 ℃.Atmosphere is controlled: body of heater nitrogen 3.5-4m
3/ h, decomposition ammonia 0.2-0.6m
3/ h, decomposition propane flammable gas 0.02-0.12m
3/ h, cooling zone nitrogen 1.5-3m
3/ h, decomposition ammonia 0.05-0.12m
3/ h, stove tail nitrogen 2.5-4m
3/ h.Sintering velocity stator is 55-65mm/min, and rotor is 75-85mm/min.After sintering, hardness reaches HRB70-90, and content of pearlite in alloy is more than 60%, and cementite is below 5%.
(4) shape is corrected in shaping
The stator shaping mould designing is arranged on 315 tons of hydraulic presses, by putting into shaping die cavity after the stator immersion oil of sintering, carries out shaping.Again the rotor shaping mould designing is arranged on 100 tons of hydraulic presses, by putting into shaping die cavity after the rotor immersion oil of sintering, carries out shaping.Stator rotor is guaranteed bottom clearance 0.05-0.08mm after shaping respectively, and goes slick, shaping rear surface Glabrous thorn.
(5) machined
By customer drawings, stator is carried out to machined, difference face work, outer diameter chamfering, car cannelure is to drawing size, guarantees product thickness 16.1-16.2mm, and end face is to hole perpendicularity below 0.015, mill both ends of the surface guarantee product thickness 16-16.02mm, use burr brushing machine deburring.
By customer drawings, rotor is carried out to machined, difference face work, internal diameter chamfering, guarantees product thickness 16.1-16.2mm, and end face is to hole perpendicularity below 0.015, and mill both ends of the surface guarantee product thickness 15.975-15.985mm, use burr brushing machine deburring.
(6) steam treatment
To after stator cleaning, drying, with steam treatment stove, carry out steam treatment, temperature 530-580 ℃, time 1.5-4 hour.After steam treatment, guarantee that product colour is consistent, without piebald, hardness reaches HRB90-120.
Then immersion oil is packed.Rotor is without steam treatment, and directly immersion oil is packed.As preferably, stator and rotor are all immersed in R407 oil.
The product that the present embodiment is produced as shown in Figure 1.The product as shown in Figure 1 making with the mach method of steel contrasts, the powder metallurgy of the present embodiment calculates by science, the special elements such as copper, nickel, molybdenum, manganese sulfide have been added, improved product mechanical performance, the wearability of goods, compression and tensile strength, rate elongation etc. have all been significantly improved.Added in addition this metallic element of chromium, the rustless property of product is strengthened greatly, optimized the material composition proportioning of product, greatly strengthened the service life of product, through bench test in 2000 hours, 45# fret wear 0.035-0.05mm, powder metallurgy stator rotor wearing and tearing 0.015mm-0.025mm, wearability obviously improves, through rustless property test, added after chromium, the antirust ability of product is significantly improved.The present invention does not add sulphur, because research discovery, the interpolation of sulphur can increase the wearing and tearing of product, affects service life.Adopting powder metallurgical technique, is the anti-wear performance that utilizes powder metallurgy, has improved the anti-wear performance of rotor product.
Adding after testing the coupon tensile strength of doing after alloying element is 817MPa, be greater than that 45 steel tensile strength (600Mpa) 35% left and right, bottom clearance dwindle 0.04mm left and right, wearability increases, three kinds of factor actings in conjunction impel that all-hydraulic steering gear security performance increases, extend service life.
Embodiment tri-:
(1) flour stirring
According to the particular characteristic of product needed, on purpose add various metals and nonmetalloid, make its finished product can reach the mechanical performance of expection.This product requirement dimensional accuracy is high, good toughness, good stability of the dimension, wearability strong, good antirust property.We adopt formula to be: 92.7% atomized iron powder, 0.7% aquadag, 4% cathode copper, 0.8% nickel powder, 1.2% molybdenum powder, 0.2% chromium powder, 0.1% manganese sulfide, 0.3% micro mist wax and 20 milliliters of bobbin oil/100 kilogram.
By pouring special-purpose flour stirring machine after raw material accurate weighing into, stir 30-60 minute, pour out and just can carry out next process in latter cooling 1 hour later.
(2) compressing
The stator compacting tool set designing is arranged on 300 tons of powder metallurgy mechanical type press, then packs the raw material being stirred into hopper, raw material enters die cavity along duff pipe, starts the compacting of tune machine.Density is controlled at 6.95-7.25g/cm
3.Highly control 16.3-16.5mm.
The rotor compacting tool set designing is arranged on 100 tons of powder metallurgy mechanical type press, then packs the raw material being stirred into hopper, raw material enters die cavity along duff pipe, starts the compacting of tune machine.Density is controlled at 6.95-7.25g/cm
3.Highly control 16.3-16.5mm.
(3) sintered alloy
Utilize powder metallurgy private network belt sintering stove sintering, product is placed on guipure, along guipure, move, from dewaxing district to ，Zai Dao cooling zone, sintering zone, then product out.Sintering zone is successively by sintering one district, sintering 2nd district, and sintering 3rd district, sintering 4th district, sintering 5th district, sintering 6th district form.Sintering temperature in sintering zone: sintering one district 560-620 ℃, sintering two district 650-760 ℃, sintering three district 850-960 ℃, sintering four district 1100-1115 ℃, sintering five district 1115-1120 ℃, sintering six district 1105-1140 ℃, product enters sintering zone from sintering one district, and from sintering, sintering zone is left in 6th district.Cooling zone consists of a cooling district and cooling 2nd district successively, and product enters cooling zone from a cooling district, from cooling 2nd district, leaves cooling zone.A cooling district water temperature 40-80 ℃, cooling two district water temperature 30-50 ℃.Atmosphere is controlled: body of heater nitrogen 3.5-4m
3/ h, decomposition ammonia 0.2-0.6m
3/ h, decomposition propane flammable gas 0.02-0.12m
3/ h, cooling zone nitrogen 1.5-3m
3/ h, decomposition ammonia 0.05-0.12m
3/ h, stove tail nitrogen 2.5-4m
3/ h.Sintering velocity stator is 55-65mm/min, and rotor is 75-85mm/min.After sintering, hardness reaches HRB70-90, and content of pearlite in alloy is more than 60%, and cementite is below 5%.
(4) shape is corrected in shaping
The stator shaping mould designing is arranged on 315 tons of hydraulic presses, by putting into shaping die cavity after the stator immersion oil of sintering, carries out shaping.Again the rotor shaping mould designing is arranged on 100 tons of hydraulic presses, by putting into shaping die cavity after the rotor immersion oil of sintering, carries out shaping.Stator rotor is guaranteed bottom clearance 0.05-0.08mm after shaping respectively, and goes slick, shaping rear surface Glabrous thorn.
(5) machined
By customer drawings, stator is carried out to machined, difference face work, outer diameter chamfering, car cannelure is to drawing size, guarantees product thickness 16.1-16.2mm, and end face is to hole perpendicularity below 0.015, mill both ends of the surface guarantee product thickness 16-16.02mm, use burr brushing machine deburring.
By customer drawings, rotor is carried out to machined, difference face work, internal diameter chamfering, guarantees product thickness 16.1-16.2mm, and end face is to hole perpendicularity below 0.015, and mill both ends of the surface guarantee product thickness 15.975-15.985mm, use burr brushing machine deburring.
(6) steam treatment
To after stator cleaning, drying, with steam treatment stove, carry out steam treatment, temperature 530-580 ℃, time 1.5-4 hour.After steam treatment, guarantee that product colour is consistent, without piebald, hardness reaches HRB90-120.
Then immersion oil is packed.Rotor is without steam treatment, and directly immersion oil is packed.As preferably, stator and rotor are all immersed in R407 oil.
The product that the present embodiment is produced as shown in Figure 1.The product as shown in Figure 1 making with the mach method of steel contrasts, the present embodiment powder metallurgy by science, calculate, the special elements such as copper, nickel, molybdenum, manganese sulfide have been added, improved product mechanical performance, the wearability of goods, compression and tensile strength, rate elongation etc. have all been significantly improved.Added in addition this metallic element of chromium, the rustless property of product is strengthened greatly, optimized the material composition proportioning of product, greatly strengthened the service life of product, through bench test in 2000 hours, 45# fret wear 0.035-0.05mm, powder metallurgy stator rotor wearing and tearing 0.015mm-0.025mm, wearability obviously improves, through rustless property test, added after chromium, the antirust ability of product is significantly improved.The present invention does not add sulphur, because research discovery, the interpolation of sulphur can increase the wearing and tearing of product, affects service life.Adopting powder metallurgical technique, is the anti-wear performance that utilizes powder metallurgy, has improved the anti-wear performance of rotor product.
Adding after testing the coupon tensile strength of doing after alloying element is 817MPa, be greater than that 45 steel tensile strength (600Mpa) 35% left and right, bottom clearance dwindle 0.04mm left and right, wearability increases, three kinds of factor actings in conjunction impel that all-hydraulic steering gear security performance increases, extend service life.
The present invention is by carrying out powder metallurgy manufacture by all-hydraulic steering gear stator-rotator pair, realized material composition proportioning science, wearability is good, easy to wear, working (machining) efficiency is high, stock utilization is high, machining accuracy is high, good antirust property texts, can meet market demands completely.
More than show and described basic principle of the present invention, principal character and advantage.The technical staff of the industry should understand, and above-described embodiment does not limit the present invention in any form, and all employings are equal to replaces or technical scheme that the mode of equivalent transformation obtains, all drops in protection scope of the present invention.
Claims (9)
1. the powder metallurgy prescription of all-hydraulic steering gear stator-rotator pair, it is characterized in that, adopt the following component of percetage by weight: 90.5-94.5% atomized iron powder, 0.6-1.2% aquadag, 1.0-4.0% cathode copper, 0.8-2.0% nickel powder, 0.5-2.0% molybdenum powder, 0.2-0.5% chromium powder, 0.1-0.6% manganese sulfide, 0.3-0.7% micro mist wax and 5-30mL bobbin oil/100kg.
2. the powder metallurgy manufacture craft of all-hydraulic steering gear stator-rotator pair described in claim 1, is characterized in that, comprises the following steps:
(1) batching: prepare burden according to described formula;
(2) flour stirring: stir 30-60 minute by pouring flour stirring machine after raw material accurate weighing into, pour out the rear cooling next process that carries out;
(3) compressing: the raw material being stirred is packed into the hopper of powder metallurgy press, raw material enters die cavity along duff pipe, start the compacting of tune machine;
(4) sintered alloy: the product after compacting is placed on net belt type sintering furnace net belt, moves along guipure, and from dewaxing district to ，Zai Dao cooling zone, sintering zone, then product out;
(5) shape is corrected in shaping: the Special shaping mould designing is arranged on shaping press, by putting into shaping die cavity after the product immersion oil of sintering, carries out shaping;
(6) machined: by drawing, stator rotor is carried out to turning, chamfering, polishing or deburring, reach finished figure requirement;
(7) steam treatment: will carry out steam treatment after stator cleaning, drying, then immersion oil packing; Rotor is without steam treatment, and directly immersion oil is packed.
3. the powder metallurgy manufacture craft of all-hydraulic steering gear stator-rotator pair according to claim 2, is characterized in that, in described step (4), the sintering velocity of stator is 55-65mm/min, and the sintering velocity of rotor is 75-85mm/min.
4. the powder metallurgy manufacture craft of all-hydraulic steering gear stator-rotator pair according to claim 3, it is characterized in that, described step (4) comprising: described sintering zone is successively by sintering one district, sintering 2nd district, sintering 3rd district, sintering 4th district, sintering 5th district, sintering 6th district form, sintering temperature in sintering zone: sintering one district 560-620 ℃, sintering two district 650-760 ℃, sintering three district 850-960 ℃, sintering four district 1100-1115 ℃, sintering five district 1115-1120 ℃, sintering six district 1105-1140 ℃, product enters sintering zone from sintering one district, from sintering, sintering zone is left in 6th district.
5. the powder metallurgy manufacture craft of all-hydraulic steering gear stator-rotator pair according to claim 4, it is characterized in that, described step (4) comprising: cooling zone consists of a cooling district and cooling 2nd district successively, product enters cooling zone from a cooling district, from cooling 2nd district, leave cooling zone, a cooling district water temperature 40-80 ℃, cooling two district water temperature 30-50 ℃.
6. the powder metallurgy manufacture craft of all-hydraulic steering gear stator-rotator pair according to claim 5, is characterized in that, described step (4) comprising: body of heater nitrogen 3.5-4m
3/ h, decomposition ammonia 0.2-0.6m
3/ h, decomposition propane flammable gas 0.02-0.12m
3/ h, cooling zone nitrogen 1.5-3m
3/ h, decomposition ammonia 0.05-0.12m
3/ h, stove tail nitrogen 2.5-4m
3/ h.
7. the powder metallurgy manufacture craft of all-hydraulic steering gear stator-rotator pair according to claim 6, is characterized in that, described step (4) comprising: the sintering velocity of stator is 55-65mm/min, and rotor is 75-85mm/min.
8. the powder metallurgy manufacture craft of all-hydraulic steering gear stator-rotator pair according to claim 7, is characterized in that, described step comprises: the temperature of steam treatment is 530-580 ℃, time 1.5-4 hour.
9. according to the powder metallurgy manufacture craft of the all-hydraulic steering gear stator-rotator pair described in claim 2 to 8 any one, it is characterized in that, described step (7) comprising: stator and rotor are all immersed in R407 oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN106111977A (en) * | 2016-07-29 | 2016-11-16 | 合肥波林新材料股份有限公司 | A kind of rotor of engine oil pump manufacture method |
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| CN109365798A (en) * | 2018-11-27 | 2019-02-22 | 曾华 | The powder metallurgy prescription of all-hydraulic steering gear stator-rotator pair |
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| CN106111977A (en) * | 2016-07-29 | 2016-11-16 | 合肥波林新材料股份有限公司 | A kind of rotor of engine oil pump manufacture method |
| CN106111977B (en) * | 2016-07-29 | 2018-05-22 | 合肥波林新材料股份有限公司 | A kind of rotor of engine oil pump manufacturing method |
| CN106238737A (en) * | 2016-08-29 | 2016-12-21 | 海安县鹰球粉末冶金有限公司 | Vacuum automobile source pump chamber manufacture method |
| CN108746589A (en) * | 2018-06-14 | 2018-11-06 | 浙江中平粉末冶金有限公司 | A kind of preparation method of iron-based powder metallurgy parts |
| CN109014223A (en) * | 2018-09-15 | 2018-12-18 | 莱州三王粉末冶金有限公司 | Vehicle ABS senses ring powder metallurgy production system and technique |
| CN109365798A (en) * | 2018-11-27 | 2019-02-22 | 曾华 | The powder metallurgy prescription of all-hydraulic steering gear stator-rotator pair |
| CN109628848A (en) * | 2018-12-28 | 2019-04-16 | 浙江江兴汽车检测设备有限公司 | A kind of Retarder dilval magnetic conductive board and preparation method thereof |
| CN110468342A (en) * | 2019-09-10 | 2019-11-19 | 温岭市恒丰粉末冶金有限公司 | A kind of nonmagnetic balance weight processing technology |
| CN117483762A (en) * | 2023-11-03 | 2024-02-02 | 广东凯洋新材料有限公司 | Manufacturing process of automobile belt pulley and automobile belt pulley manufactured by manufacturing process |
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