CN109971937A - High-carbon chromium steel passenger vehicle engine cam bit integral quenching technique and its equipment - Google Patents
High-carbon chromium steel passenger vehicle engine cam bit integral quenching technique and its equipment Download PDFInfo
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- CN109971937A CN109971937A CN201811609572.4A CN201811609572A CN109971937A CN 109971937 A CN109971937 A CN 109971937A CN 201811609572 A CN201811609572 A CN 201811609572A CN 109971937 A CN109971937 A CN 109971937A
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- 238000010791 quenching Methods 0.000 title claims abstract description 39
- 230000000171 quenching effect Effects 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 36
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 23
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 56
- 238000004140 cleaning Methods 0.000 claims abstract description 42
- 238000005242 forging Methods 0.000 claims abstract description 22
- 230000008569 process Effects 0.000 claims abstract description 19
- 238000005496 tempering Methods 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 8
- 239000011651 chromium Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000000465 moulding Methods 0.000 claims abstract description 8
- 235000006040 Prunus persica var persica Nutrition 0.000 claims abstract description 6
- 238000005422 blasting Methods 0.000 claims abstract description 4
- 238000004321 preservation Methods 0.000 claims abstract description 4
- 240000006413 Prunus persica var. persica Species 0.000 claims abstract 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 12
- 238000009659 non-destructive testing Methods 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 239000001294 propane Substances 0.000 claims description 6
- 208000037656 Respiratory Sounds Diseases 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 230000001066 destructive effect Effects 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 claims 1
- 238000004886 process control Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 description 9
- 238000001816 cooling Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 230000006378 damage Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000000227 grinding Methods 0.000 description 5
- 244000144730 Amygdalus persica Species 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- NYNKCGWJPNZJMI-UHFFFAOYSA-N Clebopride malate Chemical compound [O-]C(=O)C(O)CC(O)=O.COC1=CC(N)=C(Cl)C=C1C(=O)NC1CC[NH+](CC=2C=CC=CC=2)CC1 NYNKCGWJPNZJMI-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910000734 martensite Inorganic materials 0.000 description 3
- 238000003672 processing method Methods 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 238000005255 carburizing Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000002173 cutting fluid Substances 0.000 description 2
- 238000005262 decarbonization Methods 0.000 description 2
- 238000005261 decarburization Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 239000006247 magnetic powder Substances 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000010186 staining Methods 0.000 description 2
- 238000007669 thermal treatment Methods 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000009738 saturating Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
- C21D1/22—Martempering
-
- 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
- C21D1/62—Quenching devices
-
- 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
-
- 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
- C21D11/00—Process control or regulation for heat treatments
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/002—Heat treatment of ferrous alloys containing Cr
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/30—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for crankshafts; for camshafts
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The present invention is in order to realize that application technology problem of the high-carbon chromium steel material in cam bit devises high-carbon chromium steel passenger vehicle engine cam bit integral quenching technique, include the following steps in order, forging, the direct forging molding of the bar of high-carbon-chromium bearing steel is gone out into cam bit profile, multiple blind holes are forged between ring portion and peach tip, blind hole depth is 0.5mm ~ 3mm；Turning, the end face of turning bars；Heat treatment heats bar until austenitizing, heating temperature are 830 DEG C ~ 850 DEG C in mult-purpose chamber furnace, and heat preservation 60 to 90 minutes, then oil quenching, enters cleaning machine and clean, tempering furnace is entered after cleaning and is tempered, carries out Shot Blasting after tempering after coming out of the stove；Bar is ground to the precision of needs by fine ginding；Assembly finished product, the equipment have a whole set of complete process control system, and automation condition is high, technical maturity, can stablize mass production supply, using extensive, product heating quenching process device automatic control, there is curve and warning device and online record in real time.
Description
Technical field
The present invention relates to cam bit production technical field more particularly to high-carbon chromium steel passenger vehicle engine cam bit integral quenchings
Fire process and its equipment.
Background technique
The entirety of cam bit quench thoroughly heat treatment process generally use mult-purpose chamber furnace heating product, heating temperature use Ovshinsky
Body temperature carries out integral quenching cooling frequently with oil, then carries out returning for condition of different temperatures according to the technical requirements of product
Fire processing.
In industry, current main passenger vehicle engine cam blank, processing method mainly has cam bit and camshaft one
The single-casting or forging of body, the types such as the assembled forging and pipe fitting of steel pipe and cam bit separation.And in terms of cam block of material
Consider that the service performance of product requires mainly high-carbon-chromium bearing steel, the materials such as carburizing steel, the processing method of heat treatment mainly to have
Surface induction hardening, the methods of carburizing heat treatment, the product surface hardness using the processing of these methods is high, and centre hardness is low, from
And reach surface high wearability and intensity, the good service performance requirement of center toughness.And use high-carbon-chromium bearing steel material
Whole marquench heat-treating methods of quenching thoroughly are using less, by experimental verification, quenched thoroughly geneva using high-carbon-chromium bearing steel
The product of body integral quenching heat treatment method processing equally can satisfy the service performance requirement of product, while process is simpler
It is easy to control and operate, high production efficiency.This is a kind of completely new process.
Meanwhile high-carbon chromium steel material smelting process is mature, steel mill can be with hair with stable mass production, technical level
It is similar up to national level.The forging of this material, mach processing performance are good, are widely used in industrial circle, whole saturating
The heat treatment method process control quenched is easy, reliably, stable mass production may be implemented, industrial application has good prospects.
Summary of the invention
The present invention is in order to realize that the above technical problem devises high-carbon chromium steel passenger vehicle engine cam bit integral quenching firer
Skill includes the following steps in order,
Forging, goes out cam bit profile for the direct forging molding of the bar of high-carbon-chromium bearing steel, forges between ring portion and peach tip more
A diameter is the blind hole of 1.0mm ~ 2.0mm, and blind hole depth is 0.5mm ~ 3mm；
Cam bit center has a ring portion, the non-widest position of cam bit, interposition herein between ring portion and peach tip as a result,
Installing multiple diameters is 1.0mm ~ 2.0mm blind hole, easy to accomplish also to facilitate integrated forging molding, forms blind hole group, and its
In at least one blind hole far from blind hole group be arranged, can so prevent cam bit in use process from now on since heat expansion is cold
It is integrally destroyed caused by contracting, blind hole is hole of expanding with heat and contract with cold, and the blind hole for opening up 0.5mm ~ 3mm depth herein can either generate
The protecting effect to expand with heat and contract with cold, compared with can also guarantee as far as possible for through-hole entire cam bit heat treatment when through hardening it is complete
Entirely, the intensity for improving cam bit prevents the damage generated when heat treatment, increases the successful of heat treatment, and quenching horse is obtained after quenching
Family name's body obtains the tempered martensite of good combination property after tempering；
Turning, the end face of turning bars；
Heat treatment heats bar until austenitizing, heating temperature are 830 DEG C ~ 850 DEG C in mult-purpose chamber furnace, and heat preservation 60 is arrived
90 minutes, then oil quenching, entered cleaning machine and cleans, tempering furnace is entered after cleaning and is tempered, carries out Shot Blasting after tempering after coming out of the stove；
Bar is ground to the precision of needs by fine ginding；
Assemble finished product.
As a preference of the present invention, being handled in the heating process of the heat treatment step using gas shield, gas shield
Using nitrogen, methanol as basic atmosphere, propane carries out carbon-potential control as enriched gas.
Product oxidation and decarbonization and carburetting are prevented as a result,.
As a preference of the present invention, the forging step forges direct forging molding using high speed.
As a preference of the present invention, bar is manually placed in charging tray before the heat treatment step, successively overlay
On tooling chassis, cleaning, drying before then carrying out in cleaning machine is returned after cleaning machine carries out after heat treatment and is cleaned.
As a result, before cleaning mainly say that clast etc. of the bar after roughing washes, and carry out cleaning rust staining,
Grease stain, dirt, cutting fluid and grinding agent etc. do not influence medium and atmosphere to guarantee that the heating and cooling of bar will not be hindered
Purity etc. influences the defect etc. of thermal treatment quality, heat to prevent uneven, nonuniform organization of quenching soft spot, hardened layer etc.
Cleaning is after processing in order to remove Residual oil, salt slag and carbon black etc., cleaning and antirust ability after guaranteeing part heat treatment etc., here
It is cleaned before heat treatment in cleaning machine, rotates back into same cleaning machine and clean again after heat treatment, production can either be simplified and set
It is standby, and liquid rinse will necessarily there are the impurity such as the preceding remaining clast of cleaning in a liquid, in rear cleaning process, the liquid
Foreign particle in body can rub heat treatment after surface, thus increase friction enhancing cleaning effect, be convenient for subsequent fine
The processing of mill, it is the prior art that the various devices during which designed, which are the existing equipment that can be bought on the market,.
As a preference of the present invention, the process equipment of bar automatically controls, it is provided with curve and warning device and online
Record in real time guarantees that the surface-carburized layer of final products is less than or equal to 0.2mm, prevents crackle.
It is loaded accordingly, for product, the reasonable control of heating and the type of cooling etc. avoids product bump injury, cold
Generation the problems such as insufficient and decarburization, crackle.
As a preference of the present invention, tempering temperature selects suitable tempering temperature according to the final hardness requirement of cam flake products
Degree, general temperature select 250 DEG C ~ 270 DEG C.
As a preference of the present invention, the heat treatment step further includes non-destructive testing, i.e., it is automatic using eddy current inspection equipment
Online 100% flaw detection processing, further includes rust prevention packaging, and the cam bit of finished product is carried out antirust treatment and is then assembled.
Non-destructive testing can also be carried out non-destructive testing by devices such as ray, infiltration, magnetic powder and ultrasounds as a result, above-mentioned
Device is the prior art.
As a preference of the present invention, high-carbon chromium steel passenger vehicle engine cam bit integral quenching equipment, using a whole set of automatic
Change production equipment to be produced, wherein successively setting including forging equipment, turning equipment, mult-purpose chamber furnace, non-destructive testing in order
Standby and equipment for grinding.
As a preference of the present invention, the mult-purpose chamber furnace includes at least heating quenching furnace, cleaning equipment and tempering furnace,
The import of the heating quenching furnace is connect with the same cleaning equipment with outlet.
As a preference of the present invention, the mult-purpose chamber furnace process automatically controls, and it is provided with heat tape wherein
Protective atmosphere device, the control conditions such as temperature, time and carbon potential are monitored by sensor automatically, and the heat tape protects gas
Atmosphere device includes that, as enriched gas, can carry out carbon-potential control as basic atmosphere, propane using nitrogen, methanol.
The invention has the following advantages:
1, equipment aspect: using mult-purpose chamber furnace, and equipment has a whole set of complete process control system, and automation condition is high；
2, process aspect: full through hardening marquench, it is domestic at present to only have small passenger car small displacement engine to use this heat
Processing method handles product cam bit.
3, in terms of material: high-carbon-chromium bearing steel, technical maturity can stablize mass production supply, using extensive.
4, in terms of process control: product heating quenching process device automatically controls, and has curve and warning device and online real
Shi Jilu.Product surface decarburized layer control≤0.2mm, has avoided crackle.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Detailed description of the invention
Fig. 1 is process flow chart of the invention；
Fig. 2 is cam bit structural schematic diagram of the invention；
Fig. 3 is heat treatment cycle curve schematic diagram of the present invention；
Fig. 4 is the simplified schematic diagram of mult-purpose chamber furnace of the present invention；
Fig. 5 is the structural schematic diagram of complete equipment of the present invention；
Fig. 6 is the schematic cross-section of cam bit of the present invention；
Fig. 7 is the structural schematic diagram of mult-purpose chamber furnace of the present invention.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
As shown in Fig. 1,2,3,5 and 6, high-carbon chromium steel passenger vehicle engine cam bit integral quenching technique includes in order
Following steps,
Forging, goes out cam bit profile for the direct forging molding of the bar of high-carbon-chromium bearing steel, forges between ring portion and peach tip more
A diameter is the blind hole of 1.0mm ~ 2.0mm, and blind hole depth is 0.5mm ~ 3mm, and cam bit center has a ring portion, ring portion and peach
The non-widest position of cam bit between point, middle position herein is arranged multiple blind holes and forms blind hole group, and wherein at least has
One blind hole is arranged far from blind hole group, so can prevent cam bit from causing in use process from now on due to expanding with heat and contract with cold
It is whole destroy, blind hole is hole of expanding with heat and contract with cold, and the blind hole for opening up 0.5mm ~ 3mm herein can either generate the guarantor expanded with heat and contract with cold
Effect is protected, compared with complete, the raising cam that can also guarantee the through hardening in heat treatment of entire cam bit for through-hole as far as possible
The intensity of piece prevents the damage generated when heat treatment, increases the successful of heat treatment, obtains quenched martensite after quenching and pass through back
The tempered martensite of good combination property is obtained after fire；
Turning, the end face of turning bars；
Heat treatment heats bar until austenitizing, heating temperature are 830 DEG C ~ 850 DEG C in mult-purpose chamber furnace, and heat preservation 60 is arrived
90 minutes, then oil quenching, entered cleaning machine and cleans, tempering furnace is entered after cleaning and is tempered, carries out Shot Blasting after tempering after coming out of the stove；
Bar is ground to the precision of needs by fine ginding；
Assemble finished product.
In the present embodiment, in the heating process of the heat treatment step using gas shield handle, gas shield with nitrogen,
Methanol carries out carbon-potential control, prevents product oxidation and decarbonization and carburetting, the forging as basic atmosphere, propane as enriched gas
Step forges direct forging molding using high speed, and before the heat treatment step, bar is manually placed in charging tray, is successively stacked
On tooling chassis, cleaning, drying before then carrying out in cleaning machine is returned after cleaning machine carries out after heat treatment and is cleaned, preceding
Cleaning mainly says that clast etc. of the bar after roughing washes, and carries out cleaning rust staining, grease stain, dirt, cutting fluid
With grinding agent etc., to guarantee that the heating and cooling of bar will not be hindered, the purity etc. of medium and atmosphere is not influenced, to prevent
Uneven, nonuniform organization of quenching soft spot, hardened layer etc. influences the defect etc. of thermal treatment quality, and cleaning is after heat treatment in order to remove
Residual oil, salt slag and carbon black etc. are removed, cleaning and antirust ability after guaranteeing part heat treatment etc., in cleaning machine before being heat-treated here
Cleaning is rotated back into same cleaning machine again after heat treatment and is cleaned, and can either simplify production equipment, and liquid rinse is inevitable
Can be in a liquid there are impurity such as the preceding remaining clasts of cleaning, in rear cleaning process, the foreign particle in the liquid can
It, convenient for the processing of subsequent fine grinding, is during which designed to increase the effect of friction enhancing cleaning on the surface to rub after being heat-treated
Various devices are that the existing equipment that can be bought on the market is the prior art, and the process equipment of bar automatically controls, setting
There are curve and warning device and online record in real time, guarantees that the surface-carburized layer of final products is less than or equal to 0.2mm, prevent
It cracks, product is loaded, the reasonable control of heating and the type of cooling etc. avoids product bump injury, and cooling is not
The generation of the problems such as foot and decarburization, crackle, tempering temperature select suitable tempering according to the final hardness requirement of cam flake products
Temperature, general temperature select 250 DEG C ~ 270 DEG C, and the heat treatment step further includes non-destructive testing, that is, use eddy current inspection equipment
100% flaw detection of automatic on-line processing, further includes rust prevention packaging, and the cam bit of finished product is carried out antirust treatment and is then assembled, nothing
Damage detection can also be carried out non-destructive testing by devices such as ray, infiltration, magnetic powder and ultrasounds, and above-mentioned apparatus is existing skill
Art.
As shown in Fig. 1,4,5 and 7, in the present embodiment, high-carbon chromium steel passenger vehicle engine cam bit integral quenching equipment is adopted
Produced with a whole set of automated production equipment, wherein in order successively include forging equipment, turning equipment, mult-purpose chamber furnace,
Non-destructive detecting device and equipment for grinding, the mult-purpose chamber furnace include at least heating quenching furnace, cleaning equipment and tempering furnace,
The import of the heating quenching furnace is connect with cleaning equipment with outlet, and the mult-purpose chamber furnace process automatically controls, and
It is provided with heat tape protective atmosphere device, monitors the control conditions such as temperature, time and carbon potential automatically by sensor,
The heat tape protective atmosphere device includes that, as enriched gas, can be carried out using nitrogen, methanol as basic atmosphere, propane
Carbon-potential control.
Embodiment described above is only that preferred embodiments of the present invention will be described, not to design of the invention
It is defined with range.Without departing from the design concept of the invention, ordinary people in the field is to technical side of the invention
The all variations and modifications that case is made, should all drop into protection scope of the present invention, the claimed technology contents of the present invention,
Through being all described in the claims.
Claims (10)
1. high-carbon chromium steel passenger vehicle engine cam bit integral quenching technique, it is characterised in that: include at least following step in order
Suddenly,
Forging, goes out cam bit profile for the direct forging molding of the bar of high-carbon-chromium bearing steel, forges between ring portion and peach tip more
A blind hole, blind hole depth are 0.5mm ~ 3mm；
Turning, the end face of turning bars；
Heat treatment heats bar until austenitizing, heating temperature are 830 DEG C ~ 850 DEG C in mult-purpose chamber furnace, and heat preservation 60 is arrived
90 minutes, then oil quenching, entered cleaning machine and cleans, tempering furnace is entered after cleaning and is tempered, carries out Shot Blasting after tempering after coming out of the stove；
Bar is ground to the precision of needs by fine ginding.
2. high-carbon chromium steel passenger vehicle engine cam bit integral quenching technique according to claim 1, it is characterised in that: institute
State in the heating process of heat treatment step using gas shield handle, gas shield using nitrogen, methanol as basis atmosphere, propane
As enriched gas, carbon-potential control is carried out.
3. high-carbon chromium steel passenger vehicle engine cam bit integral quenching technique according to claim 1, it is characterised in that: institute
It states forging step and direct forging molding is forged using high speed.
4. high-carbon chromium steel passenger vehicle engine cam bit integral quenching technique according to claim 1, it is characterised in that:
Before the heat treatment step, forging blank is manually placed in charging tray, is successively overlayed on tooling chassis, then in cleaning machine
Cleaning, drying before middle progress is returned after cleaning machine carries out after heat treatment and is cleaned.
5. high-carbon chromium steel passenger vehicle engine cam bit integral quenching technique according to claim 1, it is characterised in that: stick
The process equipment of material automatically controls, and is provided with curve and warning device and online record in real time, guarantees the surface of final products
Decarburized layer is less than or equal to 0.2mm, prevents crackle.
6. high-carbon chromium steel passenger vehicle engine cam bit integral quenching technique according to claim 1, it is characterised in that: return
Fiery temperature selects suitable tempering temperature according to the final hardness requirement of cam flake products, and temperature selects 250 DEG C ~ 270 DEG C.
7. high-carbon chromium steel passenger vehicle engine cam bit integral quenching technique according to claim 1, it is characterised in that: institute
Stating heat treatment step further includes non-destructive testing, i.e., is handled using 100% flaw detection of eddy current inspection equipment automatic on-line, further include antirust
The cam bit of finished product is carried out antirust treatment and then assembled by packaging.
8. high-carbon chromium steel passenger vehicle engine cam bit integral quenching equipment, it is characterised in that: set using a whole set of automated production
It is standby to be produced, wherein in order successively including forging equipment, turning equipment, mult-purpose chamber furnace, non-destructive detecting device and mill
Turning equipment.
9. high-carbon chromium steel passenger vehicle engine cam bit integral quenching equipment according to claim 8, it is characterised in that: institute
Mult-purpose chamber furnace is stated including at least heating quenching furnace, cleaning equipment and tempering furnace, the import and outlet of the heating quenching furnace
It is connect with cleaning equipment.
10. high-carbon chromium steel passenger vehicle engine cam bit integral quenching equipment according to claim 8 or claim 9, feature exist
In: the mult-purpose chamber furnace process automatically controls, and is provided with heat tape protective atmosphere device wherein, passes through sensor
The control conditions such as automatic monitoring temperature, time and carbon potential, the heat tape protective atmosphere device include using nitrogen, methanol
As basic atmosphere, propane as enriched gas, carbon-potential control can be carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811609572.4A CN109971937B (en) | 2018-12-27 | 2018-12-27 | Integral quenching process and equipment for high-carbon chromium steel passenger car engine cam plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811609572.4A CN109971937B (en) | 2018-12-27 | 2018-12-27 | Integral quenching process and equipment for high-carbon chromium steel passenger car engine cam plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109971937A true CN109971937A (en) | 2019-07-05 |
| CN109971937B CN109971937B (en) | 2024-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811609572.4A Active CN109971937B (en) | 2018-12-27 | 2018-12-27 | Integral quenching process and equipment for high-carbon chromium steel passenger car engine cam plate |
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| CN113458878A (en) * | 2021-06-30 | 2021-10-01 | 江阴市苏恒模锻有限公司 | Machining process of variable-pitch output shaft forging for wind power |
| CN114703346A (en) * | 2022-05-17 | 2022-07-05 | 广德亿盛精密科技有限公司 | High-frequency heating and water cooling process for motor iron core of new energy automobile |
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| CN114703346A (en) * | 2022-05-17 | 2022-07-05 | 广德亿盛精密科技有限公司 | High-frequency heating and water cooling process for motor iron core of new energy automobile |
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