CN106048510B - A kind of wear-resistant gear composite heat treating process - Google Patents

A kind of wear-resistant gear composite heat treating process Download PDF

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Publication number
CN106048510B
CN106048510B CN201610502589.4A CN201610502589A CN106048510B CN 106048510 B CN106048510 B CN 106048510B CN 201610502589 A CN201610502589 A CN 201610502589A CN 106048510 B CN106048510 B CN 106048510B
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stove
afterwards
workpiece
air
passed
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CN106048510A (en
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徐孙传
卢俊
蒋亚龙
薛文奎
王广忠
宗勇彬
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DONGHUA CHAIN XINGHUA Co.,Ltd.
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XINGHUA DONGHUA GEAR CO Ltd
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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
    • 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
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/34—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in more than one step
    • 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
    • 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
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/613—Gases; Liquefied or solidified normally gaseous 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/32—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
    • 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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F17/00—Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by subclass C21D or C22F or class C25

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

The invention discloses a kind of wear-resistant gear composite heat treating process, comprise the following steps：A, it is cleaned and dried；B, carburizing；C, protective gas is air-cooled；D, it is cleaned and dried；E, heating exhaust；F, ooze by force；G, spread；H, come out of the stove air-cooled；I, antirust, present invention process is simple, whole environment friendly and pollution-free, can effectively improve the hardness, intensity and wearability of alloy-steel casting, reduce production cost, save the energy, reduce environmental pollution, temperature is high, make its gear high temperature-resistant, be unlikely to deform, rub resistance, prolongs the service life.

Description

A kind of wear-resistant gear composite heat treating process
Technical field
The present invention relates to alloy-steel casting technical field of heat treatment, is specially a kind of wear-resistant gear composite heat treating process.
Background technology
Alloy steel casting progressively substitutes ordinary carbon steel part, is widely used in casting because having the advantages that high intensity, high-wearing feature Field is made, in practical applications, it is necessary to reasonably select the intensity of low-alloy steel, hardness and toughness, existing heat treatment process is answered Miscellaneous, energy-saving effect unobvious, although certain high request, high standard can be directed in its intensity of raising high to a certain degree and hardness Accurate workpiece could be improved technique.
The content of the invention
It is an object of the invention to provide a kind of wear-resistant gear composite heat treating process, to solve to carry in above-mentioned background technology The problem of going out.
To achieve the above object, the present invention provides following technical solution：A kind of wear-resistant gear composite heat treating process, including Following steps：
A, it is cleaned and dried：Workpiece feeding cleaning machine is dried, drying time 45min, afterwards by dried work Part is sent into heating chamber；
B, carburizing：Heating chamber is heated up, it is 0.15L/h that propane amount is passed through in temperature-rise period, and heating room temperature rises to 850 At DEG C -915 DEG C, it is 0.25L/h, normal air 20L/h to be passed through propane amount, keeps constant temperature, soaking time 10min afterwards； 905 DEG C -925 DEG C are risen to heating chamber radiant tube heating with full power, temperature afterwards, the propane amount being passed through is 0.15L/h, standard null Gas is 20L/h, carbon potential 1.1-1.3；It is diffused afterwards, diffusion temperature is 905 DEG C -925 DEG C, and carbon potential is reduced to 0.75-0.95； Temperature is reduced to 810 DEG C -830 DEG C afterwards, soaking time 10min-30min, carbon potential is maintained at 0.75-0.95；
C, protective gas is air-cooled：Program end of run, is sent to quenching chamber elevator by workpiece by PPC and performs air quenching fire, together When be passed through protective gas stirring 70min, then by PPC to will be fed into prep stand air-cooled to room temperature；
D, workpiece is cleaned into stove：With the iron filings and greasy dirt on gasoline cleaning workpiece surface, shove charge after cleaning；
E, stove heating exhaust：Stove is sealed and fastened, heated up to stove into after stove by workpiece with screw, heating Ammonia is passed through at the same time, the flow for being passed through ammonia is 180-220L/h, and furnace stops heating after rising to 565 DEG C -575 DEG C；It The spiral cover on stove is reached straight-through, ignition afterwards；
F, ooze by force：Ethanol is instilled during burning, drop speed is 40-60d/min；Increase ammonia intake afterwards, and Regulating cock, it is 40-45mm high water columns to make furnace pressure, checks for gas leakage afterwards, if without gas leakage, carries out constant temperature, constant temperature time For 180min-240min；
G, spread：If without gas leakage, the ammonia intake in step C is reduced to 350-370L/h, is by the drop prompt drop of ethanol 30d/min, and furnace pressure is maintained at 40-45mm high water columns, diffusion time 30min；
H, come out of the stove air-cooled：Before coming out of the stove, bell rise after must ignition once, exhaust gas in stove is gone out by burning and exhausting Go, then opening come out of the stove it is air-cooled, complete tufftride；
I, antirust：Taken out after workpiece after step H is immersed aqueous rust preventive 3min, complete heat treatment process.
Compared with prior art, the beneficial effects of the invention are as follows：Present invention process is simple, whole environment friendly and pollution-free, can Effective hardness, intensity and the wearability for improving alloy-steel casting, extends the service life of alloy-steel casting；Quenching Step is adopted at the same time With the hierarchical quenching oil type of cooling, reduce production cost, save the energy, reduce environmental pollution, temperature is high, makes its tooth Wheel high temperature resistant, be unlikely to deform, and rub resistance, prolongs the service life.
Embodiment：
The technical solution in the embodiment of the present invention is clearly and completely described below, it is clear that described embodiment Only part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this area Art personnel all other embodiments obtained without making creative work, belong to the model that the present invention protects Enclose.
Embodiment one：
The present invention provides a kind of technical solution：A kind of wear-resistant gear composite heat treating process, comprises the following steps：
A, it is cleaned and dried：Workpiece feeding cleaning machine is dried, drying time 45min, afterwards by dried work Part is sent into heating chamber；
B, carburizing：Heating chamber is heated up, it is 0.15L/h that propane amount is passed through in temperature-rise period, and heating room temperature rises to 880 DEG C When, it is 0.25L/h, normal air 20L/h to be passed through propane amount, keeps constant temperature, soaking time 10min afterwards；Afterwards pair plus Hot cell radiant tube heating with full power, temperature rise to 925 DEG C, and the propane amount being passed through is 0.15L/h, normal air 20L/h, carbon potential For 1.2；It is diffused afterwards, diffusion temperature is 925 DEG C, and carbon potential is reduced to 0.85；Temperature is reduced to 820 DEG C afterwards, during insulation Between be 20min, carbon potential is maintained at 0.85；
C, protective gas is air-cooled：Program end of run, is sent to quenching chamber elevator by workpiece by PPC and performs air quenching fire, together When be passed through protective gas stirring 70min, then by PPC by workpiece be sent into prep stand it is air-cooled to room temperature；
D, workpiece is cleaned into stove：With the iron filings and greasy dirt on gasoline cleaning workpiece surface, shove charge after cleaning；
E, stove heating exhaust：Stove is sealed and fastened, heated up to stove into after stove by workpiece with screw, heating Ammonia is passed through at the same time, the flow for being passed through ammonia is 180L/h, and furnace stops heating after rising to 565 DEG C；Afterwards on stove Spiral cover reach straight-through, ignition；
F, ooze by force：Ethanol is instilled during burning, drop speed is 40d/min；Increase ammonia intake afterwards, and adjust Cock, it is 45mm high water columns to make furnace pressure, checks for gas leakage afterwards, if without gas leakage, carries out constant temperature, constant temperature time is 200min；
G, spread：If without gas leakage, the ammonia intake in step C is reduced to 350L/h, is 30d/ by the drop prompt drop of ethanol Min, and furnace pressure is maintained at 45mm high water columns, diffusion time 30min；
H, come out of the stove air-cooled：Before coming out of the stove, bell rise after must ignition once, exhaust gas in stove is gone out by burning and exhausting Go, then opening come out of the stove it is air-cooled, complete tufftride；
I, antirust：Taken out after workpiece after step H is immersed aqueous rust preventive 3min, complete heat treatment process.
Embodiment two：
The present invention provides a kind of technical solution：A kind of wear-resistant gear composite heat treating process, comprises the following steps：
A, it is cleaned and dried：Workpiece feeding cleaning machine is dried, drying time 45min, afterwards by dried work Part is sent into heating chamber；
B, carburizing：Heating chamber is heated up, it is 0.15L/h that propane amount is passed through in temperature-rise period, and heating room temperature rises to 915 DEG C When, it is 0.25L/h, normal air 20L/h to be passed through propane amount, keeps constant temperature, soaking time 10min afterwards；Afterwards pair plus Hot cell radiant tube heating with full power, temperature rise to 925 DEG C, and the propane amount being passed through is 0.15L/h, normal air 20L/h, carbon potential For 1.3；It is diffused afterwards, diffusion temperature is 925 DEG C, and carbon potential is reduced to 0.85；Temperature is reduced to 830 DEG C afterwards, during insulation Between be 25min, carbon potential is maintained at 0.85；
C, protective gas is air-cooled：Program end of run, is sent to quenching chamber elevator by workpiece by PPC and performs air quenching fire, together When be passed through protective gas stirring 70min, then by PPC by workpiece be sent into prep stand it is air-cooled to room temperature；
D, workpiece is cleaned into stove：With the iron filings and greasy dirt on gasoline cleaning workpiece surface, shove charge after cleaning；
E, stove heating exhaust：Stove is sealed and fastened, heated up to stove into after stove by workpiece with screw, heating Ammonia is passed through at the same time, the flow for being passed through ammonia is 220L/h, and furnace stops heating after rising to 575 DEG C；Afterwards on stove Spiral cover reach straight-through, ignition；
F, ooze by force：Ethanol is instilled during burning, drop speed is 50d/min；Increase ammonia intake afterwards, and adjust Cock, it is 45mm high water columns to make furnace pressure, checks for gas leakage afterwards, if without gas leakage, carries out constant temperature, constant temperature time is 210min；
G, spread：If without gas leakage, the ammonia intake in step C is reduced to 365L/h, is 30d/ by the drop prompt drop of ethanol Min, and furnace pressure is maintained at 45mm high water columns, diffusion time 30min；
H, come out of the stove air-cooled：Before coming out of the stove, bell rise after must ignition once, exhaust gas in stove is gone out by burning and exhausting Go, then opening come out of the stove it is air-cooled, complete tufftride；
I, antirust：Taken out after workpiece after step H is immersed aqueous rust preventive 3min, complete heat treatment process.
Embodiment three：
The present invention provides a kind of technical solution：A kind of wear-resistant gear composite heat treating process, comprises the following steps：
A, it is cleaned and dried：Workpiece feeding cleaning machine is dried, drying time 45min, afterwards by dried work Part is sent into heating chamber；
B, carburizing：Heating chamber is heated up, it is 0.15L/h that propane amount is passed through in temperature-rise period, and heating room temperature rises to 850 DEG C When, it is 0.25L/h, normal air 20L/h to be passed through propane amount, keeps constant temperature, soaking time 10min afterwards；Afterwards pair plus Hot cell radiant tube heating with full power, temperature rise to 915 DEG C, and the propane amount being passed through is 0.15L/h, normal air 20L/h, carbon potential For 1.3；It is diffused afterwards, diffusion temperature is 915 DEG C, and carbon potential is reduced to 0.90；Temperature is reduced to 820 DEG C afterwards, during insulation Between be 25min, carbon potential is maintained at 0.90；
C, protective gas is air-cooled：Program end of run, is sent to quenching chamber elevator by workpiece by PPC and performs air quenching fire, together When be passed through protective gas stirring 70min, then by PPC by workpiece be sent into prep stand it is air-cooled to room temperature；
D, workpiece is cleaned into stove：With the iron filings and greasy dirt on gasoline cleaning workpiece surface, shove charge after cleaning；
E, stove heating exhaust：Stove is sealed and fastened, heated up to stove into after stove by workpiece with screw, heating Ammonia is passed through at the same time, the flow for being passed through ammonia is 200L/h, and furnace stops heating after rising to 570 DEG C；Afterwards on stove Spiral cover reach straight-through, ignition；
F, ooze by force：Ethanol is instilled during burning, drop speed is 40d/min；Increase ammonia intake afterwards, and adjust Cock, it is 40mm high water columns to make furnace pressure, checks for gas leakage afterwards, if without gas leakage, carries out constant temperature, constant temperature time is 180min-240min；
G, spread：If without gas leakage, the ammonia intake in step C is reduced to 355L/h, is 30d/ by the drop prompt drop of ethanol Min, and furnace pressure is maintained at 40mm high water columns, diffusion time 30min；
H, come out of the stove air-cooled：Before coming out of the stove, bell rise after must ignition once, exhaust gas in stove is gone out by burning and exhausting Go, then opening come out of the stove it is air-cooled, complete tufftride；
I, antirust：Taken out after workpiece after step H is immersed aqueous rust preventive 3min, complete heat treatment process.
Example IV：
The present invention provides a kind of technical solution：A kind of wear-resistant gear composite heat treating process, comprises the following steps：
A, it is cleaned and dried：Workpiece feeding cleaning machine is dried, drying time 45min, afterwards by dried work Part is sent into heating chamber；
B, carburizing：Heating chamber is heated up, it is 0.15L/h that propane amount is passed through in temperature-rise period, and heating room temperature rises to 880 DEG C When, it is 0.25L/h, normal air 20L/h to be passed through propane amount, keeps constant temperature, soaking time 10min afterwards；Afterwards pair plus Hot cell radiant tube heating with full power, temperature rise to 910 DEG C, and the propane amount being passed through is 0.15L/h, normal air 20L/h, carbon potential For 1.2；It is diffused afterwards, diffusion temperature is 910 DEG C, and carbon potential is reduced to 0.75；Temperature is reduced to 825 DEG C afterwards, during insulation Between be 10min-30min, carbon potential is maintained at 0.75；
C, protective gas is air-cooled：Program end of run, is sent to quenching chamber elevator by workpiece by PPC and performs air quenching fire, together When be passed through protective gas stirring 70min, then by PPC by workpiece be sent into prep stand it is air-cooled to room temperature；
D, workpiece is cleaned into stove：With the iron filings and greasy dirt on gasoline cleaning workpiece surface, shove charge after cleaning；
E, stove heating exhaust：Stove is sealed and fastened, heated up to stove into after stove by workpiece with screw, heating Ammonia is passed through at the same time, the flow for being passed through ammonia is 200L/h, and furnace stops heating after rising to 568 DEG C；Afterwards on stove Spiral cover reach straight-through, ignition；
F, ooze by force：Ethanol is instilled during burning, drop speed is 45d/min；Increase ammonia intake afterwards, and adjust Cock, it is 43mm high water columns to make furnace pressure, checks for gas leakage afterwards, if without gas leakage, carries out constant temperature, constant temperature time is 210min；
G, spread：If without gas leakage, the ammonia intake in step C is reduced to 360L/h, is 30d/ by the drop prompt drop of ethanol Min, and furnace pressure is maintained at 43mm high water columns, diffusion time 30min；
H, come out of the stove air-cooled：Before coming out of the stove, bell rise after must ignition once, exhaust gas in stove is gone out by burning and exhausting Go, then opening come out of the stove it is air-cooled, complete tufftride；
I, antirust：Taken out after workpiece after step H is immersed aqueous rust preventive 3min, complete heat treatment process.
Embodiment five：
The present invention provides a kind of technical solution：A kind of wear-resistant gear composite heat treating process, comprises the following steps：
A, it is cleaned and dried：Workpiece feeding cleaning machine is dried, drying time 45min, afterwards by dried work Part is sent into heating chamber；
B, carburizing：Heating chamber is heated up, it is 0.15L/h that propane amount is passed through in temperature-rise period, and heating room temperature rises to 900 DEG C When, it is 0.25L/h, normal air 20L/h to be passed through propane amount, keeps constant temperature, soaking time 10min afterwards；Afterwards pair plus Hot cell radiant tube heating with full power, temperature rise to 925 DEG C, and the propane amount being passed through is 0.15L/h, normal air 20L/h, carbon potential For 1.3；It is diffused afterwards, diffusion temperature is 925 DEG C, and carbon potential is reduced to 0.80；Temperature is reduced to 820 DEG C afterwards, during insulation Between be 25min, carbon potential is maintained at 0.80；
C, protective gas is air-cooled：Program end of run, is sent to quenching chamber elevator by workpiece by PPC and performs air quenching fire, together When be passed through protective gas stirring 70min, then by PPC by workpiece be sent into prep stand it is air-cooled to room temperature；
D, workpiece is cleaned into stove：With the iron filings and greasy dirt on gasoline cleaning workpiece surface, shove charge after cleaning；
E, stove heating exhaust：Stove is sealed and fastened, heated up to stove into after stove by workpiece with screw, heating Ammonia is passed through at the same time, the flow for being passed through ammonia is 210L/h, and furnace stops heating after rising to 570 DEG C；Afterwards on stove Spiral cover reach straight-through, ignition；
F, ooze by force：Ethanol is instilled during burning, drop speed is 55d/min；Increase ammonia intake afterwards, and adjust Cock, it is 40mm high water columns to make furnace pressure, checks for gas leakage afterwards, if without gas leakage, carries out constant temperature, constant temperature time is 220min；
G, spread：If without gas leakage, the ammonia intake in step C is reduced to 365L/h, is 30d/ by the drop prompt drop of ethanol Min, and furnace pressure is maintained at 40mm high water columns, diffusion time 30min；
H, come out of the stove air-cooled：Before coming out of the stove, bell rise after must ignition once, exhaust gas in stove is gone out by burning and exhausting Go, then opening come out of the stove it is air-cooled, complete tufftride；
I, antirust：Taken out after workpiece after step H is immersed aqueous rust preventive 3min, complete heat treatment process.
Embodiment six：
The present invention provides a kind of technical solution：A kind of wear-resistant gear composite heat treating process, comprises the following steps：
A, it is cleaned and dried：Workpiece feeding cleaning machine is dried, drying time 45min, afterwards by dried work Part is sent into heating chamber；
B, carburizing：Heating chamber is heated up, it is 0.15L/h that propane amount is passed through in temperature-rise period, and heating room temperature rises to 875 DEG C When, it is 0.25L/h, normal air 20L/h to be passed through propane amount, keeps constant temperature, soaking time 10min afterwards；Afterwards pair plus Hot cell radiant tube heating with full power, temperature rise to 915 DEG C, and the propane amount being passed through is 0.15L/h, normal air 20L/h, carbon potential For 1.2；It is diffused afterwards, diffusion temperature is 915 DEG C, and carbon potential is reduced to 0.85；Temperature is reduced to 815 DEG C afterwards, during insulation Between be 30min, carbon potential is maintained at 0.85；
C, protective gas is air-cooled：Program end of run, is sent to quenching chamber elevator by workpiece by PPC and performs air quenching fire, together When be passed through protective gas stirring 70min, then by PPC by workpiece be sent into prep stand it is air-cooled to room temperature；
D, workpiece is cleaned into stove：With the iron filings and greasy dirt on gasoline cleaning workpiece surface, shove charge after cleaning；
E, stove heating exhaust：Stove is sealed and fastened, heated up to stove into after stove by workpiece with screw, heating Ammonia is passed through at the same time, the flow for being passed through ammonia is 220L/h, and furnace stops heating after rising to 575 DEG C；Afterwards on stove Spiral cover reach straight-through, ignition；
F, ooze by force：Ethanol is instilled during burning, drop speed is 60d/min；Increase ammonia intake afterwards, and adjust Cock, it is 45mm high water columns to make furnace pressure, checks for gas leakage afterwards, if without gas leakage, carries out constant temperature, constant temperature time is 230min；
G, spread：If without gas leakage, the ammonia intake in step C is reduced to 360L/h, is 30d/ by the drop prompt drop of ethanol Min, and furnace pressure is maintained at 45mm high water columns, diffusion time 30min；
H, come out of the stove air-cooled：Before coming out of the stove, bell rise after must ignition once, exhaust gas in stove is gone out by burning and exhausting Go, then opening come out of the stove it is air-cooled, complete tufftride；
I, antirust：Taken out after workpiece after step H is immersed aqueous rust preventive 3min, complete heat treatment process.
Experimental example：By alloy-steel casting using at the heat treatment process of ordinary heat treatment and various embodiments of the present invention Reason, obtained experimental data such as following table：
From above table data, the gear obtained using the technique of embodiment five has optimum efficiency.
Present invention process is simple, whole environment friendly and pollution-free, can effectively improve the hardness, intensity and wearability of gear, Extend the service life of gear；Quenching Step uses the hierarchical quenching oil type of cooling at the same time, reduces production cost, saves energy Source, reduces environmental pollution.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of changes, modification, replace And modification, the scope of the present invention is defined by the appended.

Claims (1)

  1. A kind of 1. wear-resistant gear composite heat treating process, it is characterised in that：Comprise the following steps：
    A, it is cleaned and dried：Workpiece feeding cleaning machine is dried, drying time 45min, afterwards send dried workpiece Enter heating chamber；
    B, carburizing：Heating chamber is heated up, it is 0.15L/h that propane amount is passed through in temperature-rise period, and heating room temperature rises to 850 DEG C -915 DEG C when, it is 0.25L/h, normal air 20L/h to be passed through propane amount, keeps constant temperature, soaking time 10min afterwards；It is right afterwards Heating chamber radiant tube heating with full power, temperature rise to 905 DEG C -925 DEG C, and the propane amount being passed through is 0.15L/h, and normal air is 20L/h, carbon potential 1.1-1.3；It is diffused afterwards, diffusion temperature is 905 DEG C -925 DEG C, and carbon potential is reduced to 0.75-0.95；Afterwards Temperature is reduced to 810 DEG C -830 DEG C, soaking time 10min-30min, carbon potential is maintained at 0.75-0.95；
    C, protective gas is air-cooled：Program end of run, is sent to quenching chamber elevator by workpiece by PPC and performs air quenching fire, lead at the same time Enter protective gas stirring 70min, then by PPC to will be fed into prep stand air-cooled to room temperature；
    D, workpiece is cleaned into stove：With the iron filings and greasy dirt on gasoline cleaning workpiece surface, shove charge after cleaning；
    E, stove heating exhaust：Stove is sealed and fastened, heated up to stove into after stove by workpiece with screw, while heating Ammonia is passed through, the flow for being passed through ammonia is 180-220L/h, and furnace stops heating after rising to 565 DEG C -575 DEG C；Handle afterwards Spiral cover on stove reaches straight-through, ignition；
    F, ooze by force：Ethanol is instilled during burning, drop speed is 40-60d/min；Increase ammonia intake afterwards, and adjust Cock, it is 40-45mm high water columns to make furnace pressure, checks for gas leakage afterwards, if without gas leakage, carries out constant temperature, constant temperature time is 180min-240min；
    G, spread：If without gas leakage, the ammonia intake in step C is reduced to 350-370L/h, is 30d/ by the drop prompt drop of ethanol Min, and furnace pressure is maintained at 40-45mm high water columns, diffusion time 30min；
    H, come out of the stove air-cooled：Before coming out of the stove, bell rise after must ignition once, exhaust gas in stove is gone out by burning and exhausting, then Opening come out of the stove it is air-cooled, complete tufftride；
    I, antirust：Taken out after workpiece after step H is immersed aqueous rust preventive 3min, complete heat treatment process.
CN201610502589.4A 2016-07-01 2016-07-01 A kind of wear-resistant gear composite heat treating process Active CN106048510B (en)

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CN108441619A (en) * 2018-04-08 2018-08-24 何盼 A kind of ring gear quenching technology
CN109487069B (en) * 2018-12-31 2020-12-18 兴化东华齿轮有限公司 Heat treatment method for controlling heat treatment deformation of inner gear ring
CN109880990A (en) * 2019-01-24 2019-06-14 嘉善平盛热处理有限公司 A kind of high speed steel material machine components heat treatment process
CN112658615A (en) * 2020-12-22 2021-04-16 通州建总起重设备安装有限公司 Machining method for valve seat of overflow valve

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