CN107245690A - A kind of carburizing quenching process - Google Patents
A kind of carburizing quenching process Download PDFInfo
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- CN107245690A CN107245690A CN201710486287.7A CN201710486287A CN107245690A CN 107245690 A CN107245690 A CN 107245690A CN 201710486287 A CN201710486287 A CN 201710486287A CN 107245690 A CN107245690 A CN 107245690A
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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
- C23C8/08—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 only one element being applied
- C23C8/20—Carburising
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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
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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
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/58—Oils
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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
- C23C8/40—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 liquids, e.g. salt baths, liquid suspensions
- C23C8/42—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 liquids, e.g. salt baths, liquid suspensions only one element being applied
- C23C8/44—Carburising
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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
- C23C8/60—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 solids, e.g. powders, pastes
- C23C8/62—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 solids, e.g. powders, pastes only one element being applied
- C23C8/64—Carburising
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Abstract
The present invention relates to a kind of carburizing quenching process, belong to technical field of metal heat treatment；The carburizing quenching process includes a carburizing, secondary carburizing, primary quenching, secondary quenching, the step such as high tempering and lonneal；Carburizing quenching process designed by the present invention is due to employing carburizing twice when carburizing is operated and shortening time of each carburizing, metal hardness is relatively low caused by long-time heating can effectively being prevented, anti-fatigue performance and anti-wear performance are reduced, etc. defect, workpiece service life is substantially prolongs；And it can be good at making workpiece discharge residual stress therein as a result of quenching twice, increase the service life.
Description
Technical field
The present invention relates to a kind of carburizing quenching process, belong to technical field of metal heat treatment.
Background technology
Carburizing and quenching is a kind of common Technology for Heating Processing of metal material, and it can be such that the workpiece surface for oozing carbon obtains very
High hardness, improves its rub proofness.Traditional handicraft mainly has：Lonneal, precooling direct quenching, heating quenching, ooze
The process such as sensing heating after carbon high-temp tempering, secondary quenching cold treatment, carburizing.Quenching technical is obtained in modern mechanical manufacturing industry
It is widely applied.Strength member in machinery, the steel part especially applied in automobile, aircraft, rocket nearly all passes through Quenching Treatment.
To meet the technical requirements that various parts vary, various quenching technicals are developed.
Carburizing is the process for instigating carbon atom to penetrate into steel surface layer.It is also the table for making the workpiece of mild steel that there is high-carbon steel
Surface layer, then by quenching and lonneal, making the superficial layer of workpiece has high rigidity and wearability, and the core of workpiece is still
So remain the toughness and plasticity of mild steel.
At present when carrying out carburizing and quenching, typically all one time carburizing, carburizing time is very long, and metal is in prolonged high
Temperature state, can cause metal hardness relatively low, reduction anti-fatigue performance and anti-wear performance, reduction of service life.
The content of the invention
The technical problem to be solved in the present invention is, in view of the shortcomings of the prior art, proposing a kind of carburizing and quenching of carburizing twice
Technique.
The present invention is that the technical scheme for solving above-mentioned technical problem proposition is：A kind of carburizing quenching process, including following step
Suddenly：
(i) carburizing
A. a carburizing, workpiece is placed in heating furnace, and heating furnace is raised to 900-950 DEG C with carburizing from room temperature, and carburizing time 1~
2.5h；
B. it is air-cooled, use the air-cooled cooldown rate with 10-12 DEG C/s to accelerate workpiece to be cooled to room the workpiece after carburizing
Temperature；
C. two carburizings, workpiece is placed in heating furnace, and heating furnace is raised to 900-950 DEG C with carburizing from room temperature, and carburizing time 2~
The strong carbon potential CP for oozing the stage in 3h, and carburizing is 1.12-1.15C%, and the carbon potential CP of diffusion phase is 0.75-0.85C%；
D. water cooling, uses water cooling that the workpiece after secondary carburizing is cooled into room temperature with 13-15 DEG C/s cooldown rate；
(ii) quench
A. primary quenching, the workpiece after secondary Carburization Treatment is put into well formula gas heating furnace, workpiece is quenched
Heat, quenching and preserving heat temperature is 750 DEG C ± 20 DEG C, soaking time is 2.5~3.5h；
After the completion of workpiece quenching heating in immersion quenching oil, it is 70-85 DEG C, 0.5~1.5h of time to keep quenching oil temperature；
B. the workpiece after primary quenching is cooled to after room temperature and cleaned；
C. secondary quenching, the workpiece after cleaning is put into well formula gas heating furnace, and workpiece is carried out at secondary quenching heating
Reason, quenching and preserving heat temperature is 650 DEG C ± 10 DEG C, and soaking time is 1~1.5h；
After the completion of workpiece quenching heating in immersion quenching oil, it is 90-105 DEG C, 0.5~1.5h of time to keep quenching oil temperature；
D. the workpiece after secondary quenching is cooled to after room temperature and cleaned；
The mass percent composition of each composition is wherein in quenching oil：Sorbitan monooleate：1.89-2.16%, glycerine
Mono fatty acid ester：1.12-1.26%, calcium dodecyl benzene sulfonate：0.19-0.31%, OPEO：0.29-
0.34%, terpene resin：0.45-0.66%, chlorinated paraffin：1.52-1.78%, dicyclopentadiene：0.43-0.56%, three oil
Acid glyceride：0.45-0.75%, dialkyl diphenylamine：0.29-0.53%, oiliness phenolic resin：1.32-1.56%, three ethanol
Amine：0.11-0.23%, polyoxylethylene abietate：0.46-0.61%, poly-alpha-olefin：0.89-0.99%, anilinomethyl three
Ethoxysilane：0.23-0.37%, sodium benzoate：0.09-0.16%, potassium molybdate：0.21-0.36%, composite assistant：1.55-
1.66%, modified stabilizer：0.82-1.23%, surplus is 60SN base oils；
(iii) it is tempered
A. high tempering, by workpiece heat to 650-700 DEG C of 1~1.5h of tempering, uses water cooling by workpiece with 13-15 DEG C/s's afterwards
Cooldown rate is cooled to room temperature；
B. lonneal, by workpiece heat to 140-155 DEG C of 2.5~3.5h of tempering, after be air-cooled to room temperature.
The improvement of above-mentioned technical proposal is：The modified stabilizer of step (ii) in middle quenching oil by following parts by weight raw material system
Into：7-12 parts of castor oil acid calcium, 6-8 parts of distearyl acyl-oxygen aluminum isopropoxide acid esters, 6-9 parts of sulfanilic acid, thiophanate methyl 2-3
Part, 6-7 parts of phenyl-N- tert-butylnitrones.
The improvement of above-mentioned technical proposal is：The composite assistant of step (ii) in middle quenching oil by following parts by weight raw material system
Into：3-4 parts of glycidyl acrylate, 1-2 parts of isobornyl acrylate, 3-5 parts of dimethicone, boronation diene base succinyl
0.5-1 parts of imines, 0.3-0.5 parts of oleamide.
It is of the invention to be using the beneficial effect of above-mentioned technical proposal：
（1）The present invention carburizing quenching process due to employed when carburizing is operated carburizing twice and shorten each carburizing when
Between, metal hardness is relatively low caused by can effectively preventing long-time heating, reduction anti-fatigue performance and anti-wear performance, etc. defect,
It substantially prolongs workpiece service life；
（2）The carburizing quenching process of the present invention compares for the first time slightly as a result of carburizing twice, and the time of second of carburizing
It is long, it can guarantee that carburized layer depth reaches 0.7-1.0mm, improve carburizing effect so that workpiece surface has more high rigidity and wearability；
（3）The carburizing quenching process of the present invention can be good at making workpiece release remnants therein should as a result of quenching twice
Power, increases the service life；
（4）The carburizing quenching process of the present invention by quenching twice after cooperation with high tempering and lonneal, further
While making workpiece release residual stress therein, overcooling austenite is carried out martensite or bainite transformation, obtain martensite
Or lower bainite tissue, to greatly improve intensity, hardness, wearability, fatigue strength and the toughness of gear；
（5）The quenching oil that the carburizing quenching process of the present invention is used, viscosity is low, good luster, oxide skin that quenching process is produced etc.
The easily calm oily bottom of impurity, is convenient to clean so that quenching oil is recycled for a long time, and quenching oil is difficult to adsorb steam, dissolved oxygen rate
It is low, mould proof to grow, oil product stable components, volatility is very low under high temperature, improves the cyclic utilization rate of quenching oil, and its
Radiating rate is 3-5 times of conventional quenching oil so that successional can be used to quench, so as to improve the quality of carburizing and quenching.
Embodiment
Embodiment 1
The carburizing quenching process of the present embodiment, comprises the following steps：
(i) carburizing
A. a carburizing, workpiece is placed in heating furnace, and heating furnace is raised to 900 DEG C with carburizing, carburizing time 1h from room temperature；
B. it is air-cooled, use the air-cooled cooldown rate with 10 DEG C/s to accelerate workpiece to be cooled to room temperature the workpiece after carburizing；
C. two carburizings, workpiece is placed in heating furnace, and heating furnace is raised to 900 DEG C with carburizing, carburizing time 2h from room temperature, and oozes
The strong carbon potential CP for oozing the stage in carbon is 1.12C%, and the carbon potential CP of diffusion phase is 0.75C%；
D. water cooling, uses water cooling that the workpiece after secondary carburizing is cooled into room temperature with 13 DEG C/s cooldown rate；
(ii) quench
A. primary quenching, the workpiece after secondary Carburization Treatment is put into well formula gas heating furnace, workpiece is quenched
Heat, quenching and preserving heat temperature is 750 DEG C ± 20 DEG C, and soaking time is 2.5h；
After the completion of workpiece quenching heating in immersion quenching oil, it is 70 DEG C, time 0.5h to keep quenching oil temperature；
B. the workpiece after primary quenching is cooled to after room temperature and cleaned；
C. secondary quenching, the workpiece after cleaning is put into well formula gas heating furnace, and workpiece is carried out at secondary quenching heating
Reason, quenching and preserving heat temperature is 650 DEG C ± 10 DEG C, and soaking time is 1h；
After the completion of workpiece quenching heating in immersion quenching oil, it is 90 DEG C, time 0.5h to keep quenching oil temperature；
D. the workpiece after secondary quenching is cooled to after room temperature and cleaned；
The mass percent composition of each composition is wherein in quenching oil：Sorbitan monooleate：1.89%, monoglycerides fat
Acid esters：1.12%, calcium dodecyl benzene sulfonate：0.19%, OPEO：0.29%, terpene resin：0.45%,
Chlorinated paraffin：1.52%, dicyclopentadiene：0.43%, olein：0.45%, dialkyl diphenylamine：0.29%, oil
Property phenolic resin：1.32%, triethanolamine：0.11%, polyoxylethylene abietate：0.46%, poly-alpha-olefin：0.89%, benzene
Amine MTES：0.23%, sodium benzoate：0.09%, potassium molybdate：0.21%, composite assistant：1.55%, it is modified
Stabilizer：0.82%, surplus is 60SN base oils；
(iii) it is tempered
A. high tempering, by workpiece heat to 650 DEG C of tempering 1h, uses water cooling to cool down workpiece with 13 DEG C/s cooldown rate afterwards
To room temperature；
B. lonneal, by workpiece heat to 140 DEG C of tempering 2.5h, after be air-cooled to room temperature.
Wherein modified stabilizer of the step (ii) in middle quenching oil is made from the following raw materials in parts by weight：7 parts of castor oil acid calcium,
6 parts of distearyl acyl-oxygen aluminum isopropoxide acid esters, 6 parts of sulfanilic acid, 2 parts of thiophanate methyl, 6 parts of phenyl-N- tert-butylnitrones.
Wherein composite assistant of the step (ii) in middle quenching oil is made from the following raw materials in parts by weight：Glycidyl acrylate
3 parts, 1 part of isobornyl acrylate, 3 parts of dimethicone, 0.5 part of boronation diene base succimide, 0.3 part of oleamide.
Embodiment 2
The carburizing quenching process of the present embodiment, comprises the following steps：
(i) carburizing
A. a carburizing, workpiece is placed in heating furnace, and heating furnace is raised to 950 DEG C with carburizing, carburizing time 2.5h from room temperature；
B. it is air-cooled, use the air-cooled cooldown rate with 12 DEG C/s to accelerate workpiece to be cooled to room temperature the workpiece after carburizing；
C. two carburizings, workpiece is placed in heating furnace, and heating furnace is raised to 950 DEG C with carburizing, carburizing time 3h from room temperature, and oozes
The strong carbon potential CP for oozing the stage in carbon is 1.15C%, and the carbon potential CP of diffusion phase is 0.85C%；
D. water cooling, uses water cooling that the workpiece after secondary carburizing is cooled into room temperature with 15 DEG C/s cooldown rate；
(ii) quench
A. primary quenching, the workpiece after secondary Carburization Treatment is put into well formula gas heating furnace, workpiece is quenched
Heat, quenching and preserving heat temperature is 750 DEG C ± 20 DEG C, and soaking time is 3.5h；
After the completion of workpiece quenching heating in immersion quenching oil, it is 85 DEG C, time 1.5h to keep quenching oil temperature；
B. the workpiece after primary quenching is cooled to after room temperature and cleaned；
C. secondary quenching, the workpiece after cleaning is put into well formula gas heating furnace, and workpiece is carried out at secondary quenching heating
Reason, quenching and preserving heat temperature is 650 DEG C ± 10 DEG C, and soaking time is 1.5h；
After the completion of workpiece quenching heating in immersion quenching oil, it is 105 DEG C, time 1.5h to keep quenching oil temperature；
D. the workpiece after secondary quenching is cooled to after room temperature and cleaned；
The mass percent composition of each composition is wherein in quenching oil：Sorbitan monooleate：2.16%, monoglycerides fat
Acid esters：1.26%, calcium dodecyl benzene sulfonate：0.31%, OPEO：0.34%, terpene resin：0.66%,
Chlorinated paraffin：1.78%, dicyclopentadiene：0.56%, olein：0.75%, dialkyl diphenylamine：0.53%, oil
Property phenolic resin：1.56%, triethanolamine：0.23%, polyoxylethylene abietate：0.61%, poly-alpha-olefin：0.99%, benzene
Amine MTES：0.37%, sodium benzoate：0.16%, potassium molybdate：0.36%, composite assistant：1.66%, it is modified
Stabilizer：1.23%, surplus is 60SN base oils；
(iii) it is tempered
A. high tempering, by workpiece heat to 700 DEG C of tempering 1.5h, uses water cooling that workpiece is cold with 15 DEG C/s cooldown rate afterwards
But to room temperature；
B. lonneal, by workpiece heat to 155 DEG C of tempering 3.5h, after be air-cooled to room temperature.
Wherein modified stabilizer of the step (ii) in middle quenching oil is made from the following raw materials in parts by weight：Castor oil acid calcium 12
Part, 8 parts of distearyl acyl-oxygen aluminum isopropoxide acid esters, 9 parts of sulfanilic acid, 3 parts of thiophanate methyl, 7 parts of phenyl-N- tert-butylnitrones.
Wherein composite assistant of the step (ii) in middle quenching oil is made from the following raw materials in parts by weight：Glycidyl acrylate
4 parts, 2 parts of isobornyl acrylate, 5 parts of dimethicone, 1 part of boronation diene base succimide, 0.5 part of oleamide.
Embodiment 3
The carburizing quenching process of the present embodiment, comprises the following steps：
(i) carburizing
A. a carburizing, workpiece is placed in heating furnace, and heating furnace is raised to 930 DEG C with carburizing, carburizing time 2h from room temperature；
B. it is air-cooled, use the air-cooled cooldown rate with 11 DEG C/s to accelerate workpiece to be cooled to room temperature the workpiece after carburizing；
C. two carburizings, workpiece is placed in heating furnace, and heating furnace is raised to 930 DEG C with carburizing from room temperature, carburizing time 2.5h, and
The strong carbon potential CP for oozing the stage in carburizing is 1.13C%, and the carbon potential CP of diffusion phase is 0.81C%；
D. water cooling, uses water cooling that the workpiece after secondary carburizing is cooled into room temperature with 14 DEG C/s cooldown rate；
(ii) quench
A. primary quenching, the workpiece after secondary Carburization Treatment is put into well formula gas heating furnace, workpiece is quenched
Heat, quenching and preserving heat temperature is 750 DEG C ± 20 DEG C, and soaking time is 3h；
After the completion of workpiece quenching heating in immersion quenching oil, it is 75 DEG C, time 1h to keep quenching oil temperature；
B. the workpiece after primary quenching is cooled to after room temperature and cleaned；
C. secondary quenching, the workpiece after cleaning is put into well formula gas heating furnace, and workpiece is carried out at secondary quenching heating
Reason, quenching and preserving heat temperature is 650 DEG C ± 10 DEG C, and soaking time is 1h；
After the completion of workpiece quenching heating in immersion quenching oil, it is 90-105 DEG C, time 1h to keep quenching oil temperature；
D. the workpiece after secondary quenching is cooled to after room temperature and cleaned；
The mass percent composition of each composition is wherein in quenching oil：Sorbitan monooleate：1.95%, monoglycerides fat
Acid esters：1.16%, calcium dodecyl benzene sulfonate：0.26%, OPEO：0.32%, terpene resin：0.56%,
Chlorinated paraffin：1.68%, dicyclopentadiene：0.52%, olein：0.65%, dialkyl diphenylamine：0.33%, oil
Property phenolic resin：1.46%, triethanolamine：0.18%, polyoxylethylene abietate：0.51%, poly-alpha-olefin：0.92%, benzene
Amine MTES：0.27%, sodium benzoate：0.13%, potassium molybdate：0.28%, composite assistant：1.58%, it is modified
Stabilizer：0.88%, surplus is 60SN base oils；
(iii) it is tempered
A. high tempering, by workpiece heat to 670 DEG C of tempering 1.2h, uses water cooling that workpiece is cold with 14 DEG C/s cooldown rate afterwards
But to room temperature；
B. lonneal, by workpiece heat to 150 DEG C of tempering 3h, after be air-cooled to room temperature.
Wherein modified stabilizer of the step (ii) in middle quenching oil is made from the following raw materials in parts by weight：Castor oil acid calcium 11
Part, 7 parts of distearyl acyl-oxygen aluminum isopropoxide acid esters, 8 parts of sulfanilic acid, 3 parts of thiophanate methyl, 7 parts of phenyl-N- tert-butylnitrones.
Wherein composite assistant of the step (ii) in middle quenching oil is made from the following raw materials in parts by weight：Glycidyl acrylate
4 parts, 2 parts of isobornyl acrylate, 4 parts of dimethicone, 0.8 part of boronation diene base succimide, 0.4 part of oleamide.
The present invention is not limited to above-described embodiment.The technical scheme of all use equivalent substitution formation, all falling within the present invention will
The protection domain asked.
Claims (3)
1. a kind of carburizing quenching process, it is characterised in that：Comprise the following steps：
(i) carburizing
A. a carburizing, workpiece is placed in heating furnace, and heating furnace is raised to 900-950 DEG C with carburizing from room temperature, and carburizing time 1~
2.5h；
B. it is air-cooled, use the air-cooled cooldown rate with 10-12 DEG C/s to accelerate workpiece to be cooled to room the workpiece after carburizing
Temperature；
C. two carburizings, workpiece is placed in heating furnace, and heating furnace is raised to 900-950 DEG C with carburizing from room temperature, and carburizing time 2~
The strong carbon potential CP for oozing the stage in 3h, and carburizing is 1.12-1.15C%, and the carbon potential CP of diffusion phase is 0.75-0.85C%；
D. water cooling, uses water cooling that the workpiece after secondary carburizing is cooled into room temperature with 13-15 DEG C/s cooldown rate；
(ii) quench
A. primary quenching, the workpiece after secondary Carburization Treatment is put into well formula gas heating furnace, workpiece is quenched
Heat, quenching and preserving heat temperature is 750 DEG C ± 20 DEG C, soaking time is 2.5~3.5h；
After the completion of workpiece quenching heating in immersion quenching oil, it is 70-85 DEG C, 0.5~1.5h of time to keep quenching oil temperature；
B. the workpiece after primary quenching is cooled to after room temperature and cleaned；
C. secondary quenching, the workpiece after cleaning is put into well formula gas heating furnace, and workpiece is carried out at secondary quenching heating
Reason, quenching and preserving heat temperature is 650 DEG C ± 10 DEG C, and soaking time is 1~1.5h；
After the completion of workpiece quenching heating in immersion quenching oil, it is 90-105 DEG C, 0.5~1.5h of time to keep quenching oil temperature；
D. the workpiece after secondary quenching is cooled to after room temperature and cleaned；
The mass percent composition of each composition is wherein in quenching oil：Sorbitan monooleate：1.89-2.16%, glycerine
Mono fatty acid ester：1.12-1.26%, calcium dodecyl benzene sulfonate：0.19-0.31%, OPEO：0.29-
0.34%, terpene resin：0.45-0.66%, chlorinated paraffin：1.52-1.78%, dicyclopentadiene：0.43-0.56%, three oil
Acid glyceride：0.45-0.75%, dialkyl diphenylamine：0.29-0.53%, oiliness phenolic resin：1.32-1.56%, three ethanol
Amine：0.11-0.23%, polyoxylethylene abietate：0.46-0.61%, poly-alpha-olefin：0.89-0.99%, anilinomethyl three
Ethoxysilane：0.23-0.37%, sodium benzoate：0.09-0.16%, potassium molybdate：0.21-0.36%, composite assistant：1.55-
1.66%, modified stabilizer：0.82-1.23%, surplus is 60SN base oils；
(iii) it is tempered
A. high tempering, by workpiece heat to 650-700 DEG C of 1~1.5h of tempering, uses water cooling by workpiece with 13-15 DEG C/s's afterwards
Cooldown rate is cooled to room temperature；
B. lonneal, by workpiece heat to 140-155 DEG C of 2.5~3.5h of tempering, after be air-cooled to room temperature.
2. carburizing quenching process according to claim 1, it is characterised in that：The step (ii) changing described in middle quenching oil
Property stabilizer is made from the following raw materials in parts by weight：7-12 parts of castor oil acid calcium, distearyl acyl-oxygen aluminum isopropoxide acid esters 6-8
Part, 6-9 parts of sulfanilic acid, 2-3 parts of thiophanate methyl, 6-7 parts of phenyl-N- tert-butylnitrones.
3. carburizing quenching process according to claim 2, it is characterised in that：The step (ii) answering described in middle quenching oil
Auxiliary agent is closed to be made from the following raw materials in parts by weight：3-4 parts of glycidyl acrylate, 1-2 parts of isobornyl acrylate, dimethyl
3-5 parts of silicone oil, 0.5-1 parts of boronation diene base succimide, 0.3-0.5 parts of oleamide.
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| CN107739647A (en) * | 2017-10-26 | 2018-02-27 | 苏州创新达成塑胶模具有限公司 | A kind of die quenching protection oil and preparation method thereof |
| CN107841600A (en) * | 2017-11-14 | 2018-03-27 | 曹安飞 | One kind is used for outdoor antirust valve processing technology |
| CN107916324A (en) * | 2017-11-14 | 2018-04-17 | 张剑 | A kind of valve spool of valve processing technology |
| CN107999704A (en) * | 2017-11-21 | 2018-05-08 | 聊城科瑞汽车零部件有限公司 | A kind of high-pressure oil pump delivery valve holder processing technology |
| CN108998719A (en) * | 2018-08-24 | 2018-12-14 | 江苏华太电力仪表有限公司 | A kind of processing technology of high-strength fireproof check valve |
| CN109321871A (en) * | 2018-10-30 | 2019-02-12 | 安徽芜湖海螺建筑安装工程有限责任公司 | The anti-anchoring piece bending cutter material and preparation method thereof that bursts apart |
| CN109465611A (en) * | 2018-12-11 | 2019-03-15 | 江苏雨顺自动化科技有限公司 | It is a kind of for automate processing high-strength die preparation process |
| CN110564940A (en) * | 2019-08-21 | 2019-12-13 | 徐州东坤耐磨材料有限公司 | Quenching processing technology of water pump impeller |
| CN110923619A (en) * | 2019-12-20 | 2020-03-27 | 嘉兴兴欣标准件热处理有限公司 | Carburizing and quenching composite heat treatment production line and treatment method |
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| CN112853259A (en) * | 2021-01-06 | 2021-05-28 | 浙江俊荣五金工业有限公司 | Low-stress screw carburizing and quenching process |
| CN113969389A (en) * | 2021-10-28 | 2022-01-25 | 惠州市思逸臻实业有限公司 | Low-temperature carburizing process for screw production |
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| CN107739647A (en) * | 2017-10-26 | 2018-02-27 | 苏州创新达成塑胶模具有限公司 | A kind of die quenching protection oil and preparation method thereof |
| CN107841600A (en) * | 2017-11-14 | 2018-03-27 | 曹安飞 | One kind is used for outdoor antirust valve processing technology |
| CN107916324A (en) * | 2017-11-14 | 2018-04-17 | 张剑 | A kind of valve spool of valve processing technology |
| CN107999704A (en) * | 2017-11-21 | 2018-05-08 | 聊城科瑞汽车零部件有限公司 | A kind of high-pressure oil pump delivery valve holder processing technology |
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| CN109321871A (en) * | 2018-10-30 | 2019-02-12 | 安徽芜湖海螺建筑安装工程有限责任公司 | The anti-anchoring piece bending cutter material and preparation method thereof that bursts apart |
| CN109465611A (en) * | 2018-12-11 | 2019-03-15 | 江苏雨顺自动化科技有限公司 | It is a kind of for automate processing high-strength die preparation process |
| CN110564940A (en) * | 2019-08-21 | 2019-12-13 | 徐州东坤耐磨材料有限公司 | Quenching processing technology of water pump impeller |
| CN110923619A (en) * | 2019-12-20 | 2020-03-27 | 嘉兴兴欣标准件热处理有限公司 | Carburizing and quenching composite heat treatment production line and treatment method |
| CN112522498A (en) * | 2020-11-17 | 2021-03-19 | 一汽解放汽车有限公司 | Transmission output shaft heat treatment strengthening process and transmission output shaft |
| CN112522498B (en) * | 2020-11-17 | 2022-08-09 | 一汽解放汽车有限公司 | Transmission output shaft heat treatment strengthening process and transmission output shaft |
| CN112853259A (en) * | 2021-01-06 | 2021-05-28 | 浙江俊荣五金工业有限公司 | Low-stress screw carburizing and quenching process |
| CN113969389A (en) * | 2021-10-28 | 2022-01-25 | 惠州市思逸臻实业有限公司 | Low-temperature carburizing process for screw production |
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