CN107338397A - A kind of direct fuel injection machine high pressure oil rail gapless stainless steel tube production technology - Google Patents
A kind of direct fuel injection machine high pressure oil rail gapless stainless steel tube production technology Download PDFInfo
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- CN107338397A CN107338397A CN201710588914.8A CN201710588914A CN107338397A CN 107338397 A CN107338397 A CN 107338397A CN 201710588914 A CN201710588914 A CN 201710588914A CN 107338397 A CN107338397 A CN 107338397A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
- C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies of ferrous alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
- C23C22/08—Orthophosphates
- C23C22/18—Orthophosphates containing manganese cations
- C23C22/182—Orthophosphates containing manganese cations containing also zinc cations
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
- C23G1/081—Iron or steel solutions containing H2SO4
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Abstract
The invention discloses a kind of direct fuel injection machine high pressure oil rail gapless stainless steel tube production technology, in turn include the following steps, choose pipe, cleaning derusting, lubrication, multi-pass precision cold-rolled, softening heat treatment, lubricate, deoil, anaerobic heat treatment, pickling, high-accuracy cold-drawn, anaerobic heat treatment, surfaces externally and internally cleaning, physical examination, chemical analysis, phosphatization, appearance mirror polish, drying, finishing, eddy current inspection, body inspection, ultrasonic examination, spray mark be put in storage.A kind of production technology of direct fuel injection machine high pressure oil rail gapless stainless steel tube involved in the present invention, so that the seamless steel pipe produced disclosure satisfy that direct fuel injection machine to high pressure oil rail stainless steel tube on any surface finish degree, toughness, tensile strength, yield strength, low-temperature impact requirement, and production cost is relatively low.
Description
Technical field
The present invention relates to seamless steel tube production technical field, especially a kind of direct fuel injection machine high pressure oil rail is with seamless stainless
Production technology of steel tube.
Background technology
In order to preferably utilize fuel resource, new work engine must use high pressure co-rail system.In common rail fuel combustion system
In, high pressure fuel is transported to common feeder line by high-pressure oil pump, is precisely controlled, made by being realized to the oil pressure of common feeder line
High pressure pipe pressure it is unrelated with the rotating speed of engine, can amplitude reduce charge oil pressure follower rotating speed change so that
Engine can obtain very high fuel pressure in all ranges of speeds.In whole hydraulic system, the spray of continuous improvement
Injection pressure proposes higher requirement in the bearing capacity using process to high pressure oil rail.
High pressure oil rail is usually to have seamless steel pipe manufacturing, has hollow section, the non-jointed circular steel in periphery, uses
Hollow billet is made by perforation in steel ingot or solid pipe billet, is then made by hot rolling, cold rolling, cold-drawn, seamless steel pipe is largely used as
The pipeline of trandfer fluid, such as high-pressure oil pipe, there is bending strength, while in light weight, while require that residual stress is small, toughness and anti-
Tensile strength is preferable.
The content of the invention
It is an object of the invention to provide a kind of direct fuel injection machine high pressure oil rail seamless stainless steel production technology, using the teaching of the invention it is possible to provide
A kind of gapless stainless steel tube meets requirement of the direct fuel injection machine to any surface finish degree of high pressure oil rail, toughness and tensile strength.
In order to solve the above technical problems, the object of the present invention is achieved like this：A kind of direct-injection combustion involved in the present invention
The production technology of oil machine high pressure oil rail gapless stainless steel tube, successively as follows,
Step A, pipe is chosen, selected pipe includes following degree composition C：0.11 invention 0.13%, Ni：0.35
Invention 0.55%, Si：0.12 invention 0.14%, Mn：0.67 invention 0.69%, Ti：0.82 invention 0.86%, Cr：2.21 invention
2.25%、Nb：0.27 invention 0.29%, W：0.71 invention 0.73%, V：0.13 invention 0.16%, Mo：0.13 invention 0.15%, N：
0.008 invention 0.010%, P：0.002 invention 0.004%, S：0.001 invention 0.003%, remaining is Fe and inevitable impurity；Choosing
The pipe taken is tested, and is heated, perforated and is taken the lead after qualified；
Step B, the stainless steel tube after processing of step A is carried out cleaning derusting and lubrication；
Step C, multi-pass precision cold-rolled is carried out to the stainless steel tube after step B processing, the stainless steel tube after precision cold-rolled it is interior
External diameter leaves its own 1% surplus；And softening heat treatment and lubrication are carried out to stainless steel tube between per pass cold rolling；
Step D, the stainless steel tube after step C processing is deoiled and anaerobic is heat-treated；
Step E, pickling is carried out to the stainless steel tube after step D processing；
Step F, high-accuracy cold-drawn is carried out using high-accuracy hydraulic pressure cold drawing machine to the stainless steel tube after step E processing so that cold-drawn
The internal-and external diameter of stainless steel tube afterwards meets the requirement of design；
Step H, anaerobic heat treatment is carried out to the stainless steel tube after step F processing, then carries out surfaces externally and internally cleaning and physical property
Inspection and chemical analysis；
Step I, the stainless steel tube after handling step H is aligned and Pipe Cutting, the stainless steel tube of length required for obtaining；
Step J, phosphatization and appearance mirror polish are carried out to the stainless steel tube after step I processing；
Step K, to step J processing after stainless steel be dried, finishing, eddy current inspection, body examine, ultrasonic examination；Inspection
Test and detect a flaw it is qualified after stainless steel tube spray mark storage.
As a further illustration of the above scheme, in the step A, the heating-up temperature to raw material pipe is 1000 ~ 1100
DEG C, it is then 40 ~ 80 minutes according to different thickness of steel pipe soaking times；The pipe after heating is entered on DC frequency-changing punch
Eleven punch 11, piercing temperature is 950 ~ 1050 DEG C, and is taken the lead.
As a further illustration of the above scheme, in step B, described cleaning is that stainless steel tube is entered using sulfuric acid except embroidery
Row cleaning, sulfuric acid solution concentration are controlled in 5 inventions 10%, and temperature control is in 60 DEG C of 50 invention.
As a further illustration of the above scheme, in step C, 2 invention, 5 passage precision cold-rolleds are carried out to stainless steel tube and added
Work, wherein the lengthening coefficient of last a time precision cold-rolled processing is 1.6 inventions 2, the precise cold of other passages in addition
The lengthening coefficient for rolling processing is 1 invention 1.5；And softening heat treatment and lubrication are carried out between two neighboring track time precision cold-rolled, its
In the sofening treatment temperature of last passage be 790 DEG C of 750 invention, the type of cooling is water smoke cooling, and cooling velocity is 10 hairs
Bright 20 DEG C/s；The sofening treatment temperature of other passages is 780 DEG C in addition thereto, using air cooled mode.
As a further illustration of the above scheme, in step E, described pickling is to immerse stainless steel tube in descaling bath,
Pickle is previously implanted in descaling bath, pickling temperature is room temperature, and pickling time is 30~60min, and pickling is taken out after terminating
Stainless steel tube is rinsed well with water；The concentrated sulfuric acid of described pickle including concentration 98%, ammonium persulfate, potassium fluoride, 8~
Oxyquinoline, sodium chloride, thiocarbamide, neopelex and deionized water；Wherein, the mass percent of 98% concentrated sulfuric acid
For 10~20%, the mass percent of ammonium persulfate is 3~5%, and the mass percent of potassium fluoride is 3~4%, 8~oxyquinoline
Mass percent is 1~1.5%, and the mass percent of sodium chloride is 0.3~0.5%, the mass percent of thiocarbamide for 0.1~
0.3%, the mass percent of neopelex is 0.05~0.1%, and surplus is deionized water.
As a further illustration of the above scheme, in step D and step H, the heat treatment of described anaerobic is by stainless steel tube
It is placed in the annealing device full of protective gas, the air pressure in annealing device is 0.5 invention 0.6MPa, and heat treatment temperature is
1000 1100 DEG C of inventions, heat treatment time are 400 invention 450s；Stainless steel tube is moved into the cooling device full of protective gas again
In, air pressure is 0.5 invention 0.6MPa, natural cooling.
As a further illustration of the above scheme, described protective gas is mixed by hydrogen and nitrogen, its volume ratio is
1：2 inventions 1：3.
As a further illustration of the above scheme, the phosphatization described in step J uses medium temperature MnZn system phosphating process.
As a further illustration of the above scheme, in step J, the pH value of phosphating solution used in described phosphatization is 2.0
Invention 2.3, phosphatization temperature is 75 DEG C of 65 invention, and phosphating time is 15 invention 20min；In described phosphating solution containing trbasic zinc phosphate,
Manganese phosphate and ferric phosphate, the content of trbasic zinc phosphate is 15 invention 20g/L, and the content of manganese phosphate is 20 invention 30g/L, and ferric phosphate contains
Measure as 20 invention 30g/L.
The beneficial effects of the invention are as follows：A kind of direct fuel injection machine high pressure oil rail gapless stainless steel tube involved in the present invention
Production technology so that the seamless steel pipe produced disclosure satisfy that direct fuel injection machine to high pressure oil rail stainless steel tube on surface
Bright and clean degree, toughness, tensile strength, yield strength, the requirement of low-temperature impact, and production cost is relatively low.
Embodiment
With reference to specific embodiment, the present invention is further described.
Embodiment one
The production technology of a kind of direct fuel injection machine high pressure oil rail gapless stainless steel tube involved by the present embodiment, successively by as follows
Step,
Step A, pipe is chosen, selected pipe includes following degree composition C：0.11%、Ni：0.35 invention %, Si：
0.12%、Mn：0.67%、Ti：0.82%、Cr：2.21%、Nb：0.27 invention %, W：0.71%、V：0.13%、Mo：0.13%、N：
0.008%、P：0.002%、S：0.001%, remaining is Fe and inevitable impurity；The pipe of selection is tested, and is carried out after qualified
Heat, perforate and take the lead；Heating-up temperature to raw material pipe is 1000 DEG C, is then 80 according to different thickness of steel pipe soaking times
Minute；Enter eleven punch 11 to the pipe after heating on DC frequency-changing punch, piercing temperature is 950 DEG C, and is taken the lead.
In the pipe of selection, carbon can improve yield point and tensile strength；Silicon can be used as reducing agent and deoxidier, can show
The elastic limit for improving steel, yield point and tensile strength are write, silicon and molybdenum, tungsten, chromium etc. combine, and are improved corrosion resistance and anti-oxidant
Effect；Manganese is good deoxidier and desulfurizing agent so that steel not only has enough toughness, and has higher intensity and hardness,
The quenching property of steel is improved, improves the hot-working character of steel, improves wearability；Chromium can significantly improve intensity, hardness and wearability, improve
The inoxidizability and corrosion resistance of steel；Nickel can improve the intensity of steel, keep good plasticity and toughness, have to soda acid higher
Corrosion resistance, there are antirust and temperature capacity at high temperature；Molybdenum can make the crystal grain refinement of steel, improve quenching degree and thermostrength,
Enough intensity and creep resisting ability are kept in high temperature, improves mechanical performance；Titanium is strong deoxidier, can make the interior tissue of steel
Densification, crystal grain thinning power, aging sensitivity and cold brittleness are reduced, improving welding property, avoids intercrystalline corrosion；Tungsten forms carbon with carbon
Changing tungsten has very high hardness and wearability；Niobium energy crystal grain thinning, the superheated susceptivity and temper brittleness of steel are reduced, improve intensity,
Improving welding property, prevent intercrystalline corrosion phenomenon.
Step B, the stainless steel tube after processing of step A is carried out cleaning derusting and lubrication；Clean except embroidery is to use sulfuric acid
Stainless steel tube is cleaned, the control of sulfuric acid solution concentration is 5%, and temperature control is at 50 DEG C.
Step C, multi-pass precision cold-rolled is carried out to the stainless steel tube after step B processing, the stainless steel tube after precision cold-rolled
Internal-and external diameter leave its own 1% surplus；And softening heat treatment and lubrication are carried out to stainless steel tube between per pass cold rolling；It is right
Stainless steel tube carries out 2 passage precision cold-rolled processing, wherein the lengthening coefficient of last a time precision cold-rolled processing is 1.6, removes
The lengthening coefficient of the precision cold-rolled processing of other passages beyond this is 1；And carried out between two neighboring track time precision cold-rolled soft
Change heat treatment and lubrication, the wherein sofening treatment temperature of last passage is 750, and the type of cooling cools down for water smoke, cooling speed
Spend for 10 DEG C/s；The sofening treatment temperature of other passages is 780 DEG C in addition thereto, using air cooled mode.
Step D, the stainless steel tube after step C processing is deoiled and anaerobic is heat-treated；Deoil is to soak stainless steel tube
Enter in except oil solution, except oil temperature is 70 DEG C, soak 10 minutes；Described removes in oil solution containing sodium hydroxide, bicarbonate
Sodium, sodium phosphate, sodium metasilicate；The mass percent of the sodium hydroxide is 8%, and the mass percent of the sodium acid carbonate is 1.5%,
The mass percent of the sodium phosphate is 3%, and the mass percent of the sodium metasilicate is 1, and surplus is water.
Anaerobic heat treatment is that stainless steel tube is placed in the annealing device full of protective gas, the gas in annealing device
It is 1000 DEG C to press as 0.5MPa, heat treatment temperature, heat treatment time 400s；Stainless steel tube is moved to full of protective gas again
In cooling device, 0.5MPa, air pressure is natural cooling.Protective gas is mixed by nitrogen and hydrogen, and its volume ratio is 1：2.
Step E, pickling is carried out to the stainless steel tube after step D processing；Pickling is to immerse stainless steel tube in descaling bath, acid
Pickle it has been previously implanted in washing trough, pickling temperature is room temperature, pickling time 30min, and pickling takes out stainless steel after terminating
Effective water is rinsed well；Described pickle includes the concentrated sulfuric acid, ammonium persulfate, potassium fluoride, the 8~hydroxyl quinoline of concentration 98%
Quinoline, sodium chloride, thiocarbamide, neopelex and deionized water；Wherein, the mass percent of 98% concentrated sulfuric acid is 10%,
The mass percent of ammonium persulfate is 3%, and the mass percent of potassium fluoride is 3%, and the mass percent of 8~oxyquinoline is 1%,
The mass percent of sodium chloride is 0.3%, and the mass percent of thiocarbamide is 0.1%, the mass percent of neopelex
For 0.05%, surplus is deionized water.
After high pressure oil rail is heat-treated with stainless steel tube, surface produces one layer of iron scale, masks existing for steel tube surface
Defect, brings hidden danger of quality, and the presence of oxidation iron sheet reduces the binding ability of lubricant and steel matrix, lubrication effect
Fruit is deteriorated, and the increase of the coefficient of friction of draw, easily causes broken end, the defects of trembling text, eliminates the method for iron scale using chemical
Method carries out pickling.
Step F, high-accuracy cold-drawn is carried out using high-accuracy hydraulic pressure cold drawing machine to the stainless steel tube after step E processing so that
The internal-and external diameter of stainless steel tube after cold-drawn meets the requirement of design；
Step H, anaerobic heat treatment is carried out to the stainless steel tube after step F processing, then carries out surfaces externally and internally cleaning and physical property
Inspection and chemical analysis；Anaerobic heat treatment is that stainless steel tube is placed in the annealing device full of protective gas, heat treatment dress
Air pressure in putting is 0.5MPa, and heat treatment temperature is 1000 DEG C, heat treatment time 400s；Stainless steel tube is moved to full of guarantor again
Protect in the cooling device of gas, 0.5MPa, air pressure is natural cooling.Protective gas is its volume ratio mixed by nitrogen and hydrogen
For 1：2.
Step I, the stainless steel tube after handling step H is aligned and Pipe Cutting, the stainless steel tube of length required for obtaining；
Step J, phosphatization and appearance mirror polish are carried out to the stainless steel tube after step I processing；Phosphatization uses medium temperature manganese Zinc phosphating
Technique.The pH value of phosphating solution used in phosphatization is 2.0, and phosphatization temperature is 65 DEG C, phosphating time 15min；Described phosphatization
Contain trbasic zinc phosphate, manganese phosphate and ferric phosphate in liquid, the content of trbasic zinc phosphate is 15g/L, and the content of manganese phosphate is 20g/L, ferric phosphate
Content be 20g/L.
Phosphatization can improve the corrosion resistance of stainless steel tube.Though phosphating coat is thin, due to being one layer of nonmetallic non-conductive isolation
Layer, the excellence conductor of surface of workpiece can be made to be changed into non-conductor, suppress the formation of surface of workpiece micro cell, and then
Effectively prevent the corrosion of film.Stainless steel base can also be improved with applying the adhesive force of interlayer or other organic finish interlayers.One side
Face, phosphating coat and metal works are a compact overall structures, and on the other hand, phosphating coat has porous, makes coating
It can penetrate among these holes, coating is combined closely with phosphating coat, and adhesive force improves.Phosphatization can also provide clean surface,
Phosphating coat could only grow in the surface of workpiece without greasy dirt and without rusty scale, therefore, by parkerized metal works,
The surface of cleaning, uniform, without grease and non-corroding can be provided.The cold-forming property of stainless steel tube can also be improved and improve surface
Frictional behaviour, to promote its slip.
Step K, to step J processing after stainless steel be dried, finishing, eddy current inspection, body examine, ultrasonic wave visit
Wound；Examine and detect a flaw it is qualified after stainless steel tube spray mark storage.
Embodiment two
The production technology of a kind of direct fuel injection machine high pressure oil rail gapless stainless steel tube involved by the present embodiment, successively by as follows
Step,
Step A, pipe is chosen, selected pipe includes following degree composition C：0.13%、Ni：0.55%、Si：
0.14%、Mn：0.69%、Ti ：0.86%、Cr：2.25%、Nb：0.29%、W：0.73%、V：0.16%、Mo：0.15%、N：0.010%、
P：0.004%、S：0.003%, remaining is Fe and inevitable impurity；The pipe of selection is tested, and is heated, worn after qualified
Hole and take the lead；Heating-up temperature to raw material pipe is 1100 DEG C, is then 40 minutes according to different thickness of steel pipe soaking times；
Enter eleven punch 11 on DC frequency-changing punch to the pipe after heating, piercing temperature is 050 DEG C, and is taken the lead.
Step B, the stainless steel tube after processing of step A is carried out cleaning derusting and lubrication；Clean except embroidery is to use sulfuric acid
Stainless steel tube is cleaned, the control of sulfuric acid solution concentration is 10%, and temperature control is at 60 DEG C.
Step C, multi-pass precision cold-rolled is carried out to the stainless steel tube after step B processing, the stainless steel tube after precision cold-rolled
Internal-and external diameter leave its own 1% surplus；And softening heat treatment and lubrication are carried out to stainless steel tube between per pass cold rolling；It is right
Stainless steel tube carries out 5 passage precision cold-rolled processing, wherein the lengthening coefficient of last a time precision cold-rolled processing is 2, except this
The lengthening coefficient of the precision cold-rolled processing of other passages in addition is 1.5；And carried out between two neighboring track time precision cold-rolled soft
Change heat treatment and lubrication, the wherein sofening treatment temperature of last passage is 790 DEG C, and the type of cooling cools down for water smoke, cooling
Speed is 20 DEG C/s；The sofening treatment temperature of other passages is 780 DEG C in addition thereto, using air cooled mode.
Step D, the stainless steel tube after step C processing is deoiled and anaerobic is heat-treated；Deoil is to soak stainless steel tube
Enter in except oil solution, except oil temperature is 80 DEG C, soak 5 minutes；Described removes in oil solution containing sodium hydroxide, bicarbonate
Sodium, sodium phosphate, sodium metasilicate；The mass percent of the sodium hydroxide is 12%, and the mass percent of the sodium acid carbonate is
2.5%, the mass percent of the sodium phosphate is 4%, and the mass percent of the sodium metasilicate is 2%, and surplus is water.
Anaerobic heat treatment is that stainless steel tube is placed in the annealing device full of protective gas, the gas in annealing device
It is 1100 DEG C to press as 0.6MPa, heat treatment temperature, heat treatment time 450s；Stainless steel tube is moved to full of protective gas again
In cooling device, 0.6MPa, air pressure is natural cooling.Protective gas is mixed by nitrogen and hydrogen, and its volume ratio is 1：3.
Step E, pickling is carried out to the stainless steel tube after step D processing；Pickling is to immerse stainless steel tube in descaling bath, acid
Pickle it has been previously implanted in washing trough, pickling temperature is room temperature, pickling time 60min, and pickling takes out stainless steel after terminating
Effective water is rinsed well；Described pickle includes the concentrated sulfuric acid, ammonium persulfate, potassium fluoride, the 8~hydroxyl quinoline of concentration 98%
Quinoline, sodium chloride, thiocarbamide, neopelex and deionized water；Wherein, the mass percent of 98% concentrated sulfuric acid is 120%,
The mass percent of ammonium persulfate is 5%, and the mass percent of potassium fluoride is 4%, and the mass percent of 8~oxyquinoline is
1.5%, the mass percent of sodium chloride is 0.5%, and the mass percent of thiocarbamide is 0.3%, the quality hundred of neopelex
Divide than being 0.1%, surplus is deionized water.
Step F, high-accuracy cold-drawn is carried out using high-accuracy hydraulic pressure cold drawing machine to the stainless steel tube after step E processing so that
The internal-and external diameter of stainless steel tube after cold-drawn meets the requirement of design；
Step H, anaerobic heat treatment is carried out to the stainless steel tube after step F processing, then carries out surfaces externally and internally cleaning and physical property
Inspection and chemical analysis；Anaerobic heat treatment is that stainless steel tube is placed in the annealing device full of protective gas, heat treatment dress
Air pressure in putting is 0.6MPa, and heat treatment temperature is 1100 DEG C, heat treatment time 450s；Stainless steel tube is moved to full of guarantor again
Protect in the cooling device of gas, 0.6MPa, air pressure is natural cooling.Protective gas is its volume ratio mixed by nitrogen and hydrogen
For 1：3.
Step I, the stainless steel tube after handling step H is aligned and Pipe Cutting, the stainless steel tube of length required for obtaining；
Step J, phosphatization and appearance mirror polish are carried out to the stainless steel tube after step I processing；Phosphatization uses medium temperature manganese Zinc phosphating
Technique.The pH value of phosphating solution used in phosphatization is 2.3, and phosphatization temperature is 75 DEG C, phosphating time 20min；Described phosphatization
Contain trbasic zinc phosphate, manganese phosphate and ferric phosphate in liquid, the content of trbasic zinc phosphate is 20g/L, and the content of manganese phosphate is 30g/L, ferric phosphate
Content be 30g/L.
Step K, to step J processing after stainless steel be dried, finishing, eddy current inspection, body examine, ultrasonic wave visit
Wound；Examine and detect a flaw it is qualified after stainless steel tube spray mark storage.
Preferred embodiment of the invention described in detail above.It should be appreciated that one of ordinary skill in the art without
Creative work can is needed to make many modifications and variations according to the design of the present invention.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical scheme, all should be in the protection domain being defined in the patent claims.
Claims (9)
- A kind of 1. direct fuel injection machine high pressure oil rail gapless stainless steel tube production technology, it is characterised in that successively as follows,Step A, pipe is chosen, selected pipe includes following degree composition C：0.11~0.13%, Ni：0.35~ 0.55%、Si：0.12~0.14%, Mn：0.67~0.69%, Ti：0.82~0.86%, Cr：2.21~2.25%, Nb：0.27~ 0.29%、W：0.71~0.73%, V：0.13~0.16%, Mo：0.13~0.15%, N：0.008~0.010%, P：0.002~ 0.004%、S：0.001~0.003%, remaining is Fe and inevitable impurity；The pipe of selection is tested, and is added after qualified Heat, perforate and take the lead；Step B, the stainless steel tube after processing of step A is carried out cleaning derusting and lubrication；Step C, multi-pass precision cold-rolled is carried out to the stainless steel tube after step B processing, the stainless steel tube after precision cold-rolled it is interior External diameter leaves its own 1% surplus；And softening heat treatment and lubrication are carried out to stainless steel tube between per pass cold rolling；Step D, the stainless steel tube after step C processing is deoiled and anaerobic is heat-treated；Step E, pickling is carried out to the stainless steel tube after step D processing；Step F, high-accuracy cold-drawn is carried out using high-accuracy hydraulic pressure cold drawing machine to the stainless steel tube after step E processing so that cold-drawn The internal-and external diameter of stainless steel tube afterwards meets the requirement of design；Step H, anaerobic heat treatment is carried out to the stainless steel tube after step F processing, then carries out surfaces externally and internally cleaning and physical property Inspection and chemical analysis；Step I, the stainless steel tube after handling step H is aligned and Pipe Cutting, the stainless steel tube of length required for obtaining；Step J, phosphatization and appearance mirror polish are carried out to the stainless steel tube after step I processing；Step K, to step J processing after stainless steel be dried, finishing, eddy current inspection, body examine, ultrasonic examination；Inspection Test and detect a flaw it is qualified after stainless steel tube spray mark storage.
- 2. direct fuel injection machine high pressure oil rail gapless stainless steel tube production technology as claimed in claim 1, it is characterised in that institute State in step A, be 1000 ~ 1100 DEG C to the heating-up temperature of raw material pipe, then according to different thickness of steel pipe soaking times be 40 ~ 80 minutes；Enter eleven punch 11 to the pipe after heating on DC frequency-changing punch, piercing temperature is 950 ~ 1050 DEG C, and is beaten Head.
- 3. direct fuel injection machine high pressure oil rail gapless stainless steel tube production technology as claimed in claim 1, it is characterised in that step In rapid B, described cleaning is that stainless steel tube is cleaned using sulfuric acid except embroidery, and the control of sulfuric acid solution concentration is 5~10%, temperature Degree control is at 50~60 DEG C.
- 4. direct fuel injection machine high pressure oil rail gapless stainless steel tube production technology as claimed in claim 1, it is characterised in that step In rapid C, 2~5 passage precision cold-rolled processing is carried out to stainless steel tube, wherein the extension system of last a time precision cold-rolled processing Number is 1.6~2, and the lengthening coefficient of the precision cold-rolled processing of other passages in addition is 1~1.5；And in two neighboring track time Softening heat treatment and lubrication are carried out between precision cold-rolled, the wherein sofening treatment temperature of last passage is 750~790 DEG C, The type of cooling cools down for water smoke, and cooling velocity is 10~20 DEG C/s；The sofening treatment temperature of other passages is 780 in addition thereto DEG C, using air cooled mode.
- 5. direct fuel injection machine high pressure oil rail gapless stainless steel tube production technology as claimed in claim 1, it is characterised in that step In rapid E, described pickling is to immerse stainless steel tube in descaling bath, pickle has been previously implanted in descaling bath, pickling temperature is For room temperature, pickling time is 30~60min, and pickling is taken out stainless steel tube after terminating and rinsed well with water；Described pickling Liquid includes the concentrated sulfuric acid, ammonium persulfate, potassium fluoride, 8~oxyquinoline, sodium chloride, thiocarbamide, the DBSA of concentration 98% Sodium and deionized water；Wherein, the mass percent of 98% concentrated sulfuric acid is 10~20%, the mass percent of ammonium persulfate for 3~ 5%, the mass percent of potassium fluoride is 3~4%, and the mass percent of 8~oxyquinoline is 1~1.5%, the quality hundred of sodium chloride Divide than being 0.3~0.5%, the mass percent of thiocarbamide is 0.1~0.3%, and the mass percent of neopelex is 0.05~0.1%, surplus is deionized water.
- 6. direct fuel injection machine high pressure oil rail gapless stainless steel tube production technology as claimed in claim 1, it is characterised in that step In rapid D and step H, the heat treatment of described anaerobic is that stainless steel tube is placed in the annealing device full of protective gas, at heat Air pressure in reason device is 0.5~0.6MPa, and heat treatment temperature is 1000~1100 DEG C, and heat treatment time is 400~450s；Again Stainless steel tube is moved in the cooling device full of protective gas, air pressure is 0.5~0.6MPa, natural cooling.
- 7. direct fuel injection machine high pressure oil rail gapless stainless steel tube production technology as claimed in claim 5, it is characterised in that institute The protective gas stated is mixed by hydrogen and nitrogen, and its volume ratio is 1：2~1：3.
- 8. direct fuel injection machine high pressure oil rail gapless stainless steel tube production technology as claimed in claim 1, it is characterised in that step Phosphatization described in rapid J uses medium temperature MnZn system phosphating process.
- 9. direct fuel injection machine high pressure oil rail gapless stainless steel tube production technology as claimed in claim 7, it is characterised in that step In rapid J, the pH value of phosphating solution used in described phosphatization is 2.0~2.3, and phosphatization temperature is 65~75 DEG C, and phosphating time is 15~20min；Contain trbasic zinc phosphate, manganese phosphate and ferric phosphate in described phosphating solution, the content of trbasic zinc phosphate is 15~20g/L, phosphorus The content of sour manganese is 20~30g/L, and the content of ferric phosphate is 20~30g/L.
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| CN107931331A (en) * | 2017-11-27 | 2018-04-20 | 河北金奥管业有限公司 | A kind of production method of two roller cold rolling seamless steel of high accuracy |
| CN108406315A (en) * | 2018-04-27 | 2018-08-17 | 上海众源燃油分配器制造有限公司 | A kind of gasoline high pressure oil rail forging system and technique |
| CN108581057A (en) * | 2018-05-04 | 2018-09-28 | 山东大学 | A kind of surface layer alloying Weakening treatment assistance processing method for difficult-to-machine material high-efficient cutting |
| CN108607892A (en) * | 2018-05-08 | 2018-10-02 | 浙江义腾特种钢管有限公司 | A kind of processing technology of high precision instrument stainless steel hard state tube |
| CN111455154A (en) * | 2020-04-09 | 2020-07-28 | 鑫鹏源(聊城)智能科技有限公司 | Heating device of seamless steel tube capable of automatically removing oil |
| CN112108532A (en) * | 2020-09-07 | 2020-12-22 | 江阴商骏精密钢管有限公司 | Production process of steel pipe for high-pressure oil pipe |
| CN114602995A (en) * | 2022-02-25 | 2022-06-10 | 江苏铭展特钢制造有限公司 | High-pressure-resistant corrosion-resistant stainless steel bar and processing technology thereof |
| CN114798801A (en) * | 2021-08-25 | 2022-07-29 | 常熟市异型钢管有限公司 | Automatic production method of high-precision oxygen-free steel pipe |
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| CN112108532A (en) * | 2020-09-07 | 2020-12-22 | 江阴商骏精密钢管有限公司 | Production process of steel pipe for high-pressure oil pipe |
| CN114798801A (en) * | 2021-08-25 | 2022-07-29 | 常熟市异型钢管有限公司 | Automatic production method of high-precision oxygen-free steel pipe |
| CN114602995A (en) * | 2022-02-25 | 2022-06-10 | 江苏铭展特钢制造有限公司 | High-pressure-resistant corrosion-resistant stainless steel bar and processing technology thereof |
| CN114602995B (en) * | 2022-02-25 | 2023-12-26 | 江苏铭展特钢制造有限公司 | High-pressure-resistant corrosion-resistant stainless steel rod and processing technology thereof |
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Application publication date: 20171110 |