CN110512167A - A kind of hydraulic part Surface hardened layer carbo-nitriding heat treatment process - Google Patents
A kind of hydraulic part Surface hardened layer carbo-nitriding heat treatment process Download PDFInfo
- Publication number
- CN110512167A CN110512167A CN201910961856.8A CN201910961856A CN110512167A CN 110512167 A CN110512167 A CN 110512167A CN 201910961856 A CN201910961856 A CN 201910961856A CN 110512167 A CN110512167 A CN 110512167A
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- CN
- China
- Prior art keywords
- hydraulic part
- carbo
- tempering
- heat treatment
- hardened layer
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Classifications
-
- 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
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- 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
- C23C8/28—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 one step
- C23C8/30—Carbo-nitriding
- C23C8/32—Carbo-nitriding of ferrous surfaces
Abstract
The invention discloses a kind of hydraulic part Surface hardened layer carbo-nitriding heat treatment process, comprising the following steps: S1: removing surface: carrying out degreasing processing to the surface of hydraulic part；S2: normalized treatment: hydraulic part being placed in normalizing furnace and carries out normalized treatment, carries out cooling treatment to it after the completion of normalizing；S3: quenching treatment: hydraulic part being placed in glowing furnace and is quenched, secondary after the completion of quenching to carry out cooling treatment to it；S4: tempering: hydraulic part being placed in tempering furnace and carries out tempering, carries out cooling treatment to it three times after the completion of tempering；S5: it examines: the mass fraction of C and N in the hydraulic part after the completion of tempering is tested.Compared with prior heat treatment method, the mass fraction of C and N has high rigidity, high resistance to tempering, high-wearing feature and fatigue resistance within the scope of defined in the hydraulic part that this method enables to.
Description
Technical field
The present invention relates to technical field of heat treatment more particularly to a kind of hydraulic part Surface hardened layer carbo-nitriding to be heat-treated work
Skill.
Background technique
Carbo-nitriding is active C, N atom while the chemical heat treatment process for penetrating into steel piece surface, it is to seep C and infiltration Nization
Enbrittle small, toughness of the combination for learning heat treatment process, the strong point both having concurrently, and C-N co-penetration layer is high and in conjunction with matrix
The features such as secured and resistance to flaking, has and gradually replaces seeping C trend.But various lack can be generated because of various reasons in actual production
It falls into, especially to the control aspect of rigidity layer, is to ensure that the infiltration layer quality of C, N permeation and the important prerequisite of product service life.
Carbo-nitriding process must be strictly controlled the carbon nitrogen concentration of infiltration layer, and content is too low, cannot obtain high intensity, hard
Degree and ideal residual stress, influence wearability and fatigue strength, conversely, not only a large amount of non-uniform block carbon nitrogen occurs in surface layer
Compound, brittleness increase.
Summary of the invention
Technical problems based on background technology, the invention proposes at a kind of hydraulic part Surface hardened layer carbo-nitriding heat
Science and engineering skill.
A kind of hydraulic part Surface hardened layer carbo-nitriding heat treatment process proposed by the present invention, comprising the following steps:
S1: degreasing processing removing surface: is carried out to the surface of hydraulic part；
S2: normalized treatment: hydraulic part being placed in normalizing furnace and carries out normalized treatment, carries out cooling place after the completion of normalizing to it
Reason；
S3: quenching treatment: hydraulic part being placed in glowing furnace and is quenched, secondary after the completion of quenching to cool down to it
Processing；
S4: tempering: hydraulic part being placed in tempering furnace and carries out tempering, is cooled down three times to it after the completion of tempering
Processing；
S5: it examines: the mass fraction of C and N in the hydraulic part after the completion of tempering is tested；
S6: comparison: the mass fraction of result and standard content C and N after inspection is compared.
Preferably, it in the S1, with mixture cleaning solution laminate surface 3-6 times of acetone and dehydrated alcohol, then uses again
Clear water washs 2-5 times, finally that the hydraulic part surface drying after cleaning is spare.
Preferably, it in the S2, needs to be heated twice during normalized treatment, is heated to 800-840 for the first time
DEG C and keep 8-15min, be heated to 940-1060 DEG C for the second time and keep 15-20min.
Preferably, in the S2, first time cooling treatment is carried out to hydraulic part using cold air.
Preferably, in the S3, hydraulic part is heated to 900-1000 DEG C, keeps the temperature 25-30min.
Preferably, in the S3, second of cooling treatment is carried out to hydraulic part using mineral oil.
Preferably, in the S4, when hydraulic part is heated to 500-600 DEG C, 45-55min is kept the temperature.
Preferably, in the S4, third time cooling treatment is carried out to hydraulic part using water cooling.
Preferably, in the S5, after having inspected, inspection result is subjected to record processing.
Preferably, in the S6, the control errors of C, N mass fraction and nominally C, N mass fraction after inspection
± 0.01%.
Beneficial effects of the present invention: by a normalizing, primary quenching and primary tempering, step is clear, obtains high-quality
Hydraulic part, have good plasticity, toughness, intensity and hardness, improve the service life of hydraulic part, C and N in strict control hydraulic part
Mass fraction, by the accurately time control, have high rigidity, high resistance to tempering, high-wearing feature and fatigue resistance, can be complete
It avoids steel piece surface to take off C and oxidation entirely and surface is shelly-shaped and netted compound.
Through the invention to hydraulic part Surface hardened layer carbo-nitriding heat-treating methods, step cleaning, obtained hydraulic part
The mass fraction of middle C and N has high rigidity, high resistance to tempering, high-wearing feature and fatigue resistance within the scope of defined.
Specific embodiment
Combined with specific embodiments below the present invention is made further to explain.
Embodiment one
A kind of hydraulic part Surface hardened layer carbo-nitriding heat treatment process is proposed in the present embodiment, comprising the following steps:
S1: degreasing processing removing surface: is carried out to the surface of hydraulic part；
S2: normalized treatment: hydraulic part being placed in normalizing furnace and carries out normalized treatment, carries out cooling place after the completion of normalizing to it
Reason；
S3: quenching treatment: hydraulic part being placed in glowing furnace and is quenched, secondary after the completion of quenching to cool down to it
Processing；
S4: tempering: hydraulic part being placed in tempering furnace and carries out tempering, is cooled down three times to it after the completion of tempering
Processing；
S5: it examines: the mass fraction of C and N in the hydraulic part after the completion of tempering is tested；
S6: comparison: the mass fraction of result and standard content C and N after inspection is compared.
In the present embodiment, in S1, with mixture cleaning solution laminate surface 3 times of acetone and dehydrated alcohol, then again with clear
It is water washing 2 times, finally that the hydraulic part surface drying after cleaning is spare, it needs to carry out twice in S2, during normalized treatment
Heating, is heated to 800 DEG C for the first time and keeps 8min, be heated to 940 DEG C for the second time and keep 15min, in S2, using cold air
First time cooling treatment is carried out to hydraulic part, in S3, hydraulic part is heated to 900 DEG C, keeps the temperature 25min, in S3, using mineral oil
Second of cooling treatment is carried out to hydraulic part, in S4, when hydraulic part is heated to 500 DEG C, 45min is kept the temperature, in S4, using water cooling
Third time cooling treatment is carried out to hydraulic part, in S5, after having inspected, inspection result is subjected to record processing, in S6, after inspection
C, N mass fraction and nominally C, N mass fraction control errors ± 0.01%.
Embodiment two
A kind of hydraulic part Surface hardened layer carbo-nitriding heat treatment process is proposed in the present embodiment, comprising the following steps:
A kind of hydraulic part Surface hardened layer carbo-nitriding heat treatment process is proposed in the present embodiment, comprising the following steps:
S1: degreasing processing removing surface: is carried out to the surface of hydraulic part；
S2: normalized treatment: hydraulic part being placed in normalizing furnace and carries out normalized treatment, carries out cooling place after the completion of normalizing to it
Reason；
S3: quenching treatment: hydraulic part being placed in glowing furnace and is quenched, secondary after the completion of quenching to cool down to it
Processing；
S4: tempering: hydraulic part being placed in tempering furnace and carries out tempering, is cooled down three times to it after the completion of tempering
Processing；
S5: it examines: the mass fraction of C and N in the hydraulic part after the completion of tempering is tested；
S6: comparison: the mass fraction of result and standard content C and N after inspection is compared.
In the present embodiment, in S1, with mixture cleaning solution laminate surface 4 times of acetone and dehydrated alcohol, then again with clear
It is water washing 3 times, finally that the hydraulic part surface drying after cleaning is spare, it needs to carry out twice in S2, during normalized treatment
Heating, is heated to 810 DEG C for the first time and keeps 9min, be heated to 950 DEG C for the second time and keep 16min, in S2, using cold air
First time cooling treatment is carried out to hydraulic part, in S3, hydraulic part is heated to 920 DEG C, keeps the temperature 26min, in S3, using mineral oil
Second of cooling treatment is carried out to hydraulic part, in S4, when hydraulic part is heated to 520 DEG C, 46min is kept the temperature, in S4, using water cooling
Third time cooling treatment is carried out to hydraulic part, in S5, after having inspected, inspection result is subjected to record processing, in S6, after inspection
C, N mass fraction and nominally C, N mass fraction control errors ± 0.01%.
Embodiment three
A kind of hydraulic part Surface hardened layer carbo-nitriding heat treatment process is proposed in the present embodiment, comprising the following steps:
A kind of hydraulic part Surface hardened layer carbo-nitriding heat treatment process is proposed in the present embodiment, comprising the following steps:
S1: degreasing processing removing surface: is carried out to the surface of hydraulic part；
S2: normalized treatment: hydraulic part being placed in normalizing furnace and carries out normalized treatment, carries out cooling place after the completion of normalizing to it
Reason；
S3: quenching treatment: hydraulic part being placed in glowing furnace and is quenched, secondary after the completion of quenching to cool down to it
Processing；
S4: tempering: hydraulic part being placed in tempering furnace and carries out tempering, is cooled down three times to it after the completion of tempering
Processing；
S5: it examines: the mass fraction of C and N in the hydraulic part after the completion of tempering is tested；
S6: comparison: the mass fraction of result and standard content C and N after inspection is compared.
In the present embodiment, in S1, with mixture cleaning solution laminate surface 5 times of acetone and dehydrated alcohol, then again with clear
It is water washing 4 times, finally that the hydraulic part surface drying after cleaning is spare, it needs to carry out twice in S2, during normalized treatment
Heating, is heated to 820 DEG C and keeps 10min, be heated to 1000 DEG C for the second time and keep 17min, for the first time in S2, using cold sky
Air-to-liquid casting die carries out first time cooling treatment, and in S3, hydraulic part is heated to 960 DEG C, keeps the temperature 27min, in S3, using mineral
Oil carries out second of cooling treatment to hydraulic part, in S4, when hydraulic part is heated to 550 DEG C, 47min is kept the temperature, in S4, using water
It is cold that third time cooling treatment is carried out to hydraulic part, in S5, after having inspected, inspection result is subjected to record processing, in S6, is examined
The control errors of rear C, N mass fraction and nominally C, N mass fraction are ± 0.01%.
Example IV
A kind of hydraulic part Surface hardened layer carbo-nitriding heat treatment process is proposed in the present embodiment, comprising the following steps:
S1: degreasing processing removing surface: is carried out to the surface of hydraulic part；
S2: normalized treatment: hydraulic part being placed in normalizing furnace and carries out normalized treatment, carries out cooling place after the completion of normalizing to it
Reason；
S3: quenching treatment: hydraulic part being placed in glowing furnace and is quenched, secondary after the completion of quenching to cool down to it
Processing；
S4: tempering: hydraulic part being placed in tempering furnace and carries out tempering, is cooled down three times to it after the completion of tempering
Processing；
S5: it examines: the mass fraction of C and N in the hydraulic part after the completion of tempering is tested；
S6: comparison: the mass fraction of result and standard content C and N after inspection is compared.
In the present embodiment, in S1, with mixture cleaning solution laminate surface 5 times of acetone and dehydrated alcohol, then again with clear
It is water washing 4 times, finally that the hydraulic part surface drying after cleaning is spare, it needs to carry out twice in S2, during normalized treatment
Heating, is heated to 830 DEG C and keeps 13min, be heated to 1030 DEG C for the second time and keep 19min, for the first time in S2, using cold sky
Air-to-liquid casting die carries out first time cooling treatment, and in S3, hydraulic part is heated to 980 DEG C, keeps the temperature 29min, in S3, using mineral
Oil carries out second of cooling treatment to hydraulic part, in S4, when hydraulic part is heated to 580 DEG C, 54min is kept the temperature, in S4, using water
It is cold that third time cooling treatment is carried out to hydraulic part, in S5, after having inspected, inspection result is subjected to record processing, in S6, is examined
The control errors of rear C, N mass fraction and nominally C, N mass fraction are ± 0.01%.
Embodiment five
A kind of hydraulic part Surface hardened layer carbo-nitriding heat treatment process is proposed in the present embodiment, comprising the following steps:
S1: degreasing processing removing surface: is carried out to the surface of hydraulic part；
S2: normalized treatment: hydraulic part being placed in normalizing furnace and carries out normalized treatment, carries out cooling place after the completion of normalizing to it
Reason；
S3: quenching treatment: hydraulic part being placed in glowing furnace and is quenched, secondary after the completion of quenching to cool down to it
Processing；
S4: tempering: hydraulic part being placed in tempering furnace and carries out tempering, is cooled down three times to it after the completion of tempering
Processing；
S5: it examines: the mass fraction of C and N in the hydraulic part after the completion of tempering is tested；
S6: comparison: the mass fraction of result and standard content C and N after inspection is compared.
In the present embodiment, in S1, with mixture cleaning solution laminate surface 6 times of acetone and dehydrated alcohol, then again with clear
It is water washing 5 times, finally that the hydraulic part surface drying after cleaning is spare, it needs to carry out twice in S2, during normalized treatment
Heating, is heated to 840 DEG C and keeps 15min, be heated to 1060 DEG C for the second time and keep 20min, for the first time in S2, using cold sky
Air-to-liquid casting die carries out first time cooling treatment, and in S3, hydraulic part is heated to 1000 DEG C, keeps the temperature 30min, in S3, using mine
Object oil carries out second of cooling treatment to hydraulic part, in S4, when hydraulic part is heated to 600 DEG C, keeps the temperature 55min, in S4, uses
Water cooling carries out third time cooling treatment to hydraulic part, and in S5, after having inspected, inspection result is carried out record processing, in S6, inspection
The control errors of C, N mass fraction after testing and nominally C, N mass fraction are ± 0.01%.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of hydraulic part Surface hardened layer carbo-nitriding heat treatment process, which comprises the following steps:
S1: degreasing processing removing surface: is carried out to the surface of hydraulic part；
S2: normalized treatment: hydraulic part being placed in normalizing furnace and carries out normalized treatment, carries out cooling place after the completion of normalizing to it
Reason；
S3: quenching treatment: hydraulic part being placed in glowing furnace and is quenched, secondary after the completion of quenching to cool down to it
Processing；
S4: tempering: hydraulic part being placed in tempering furnace and carries out tempering, is cooled down three times to it after the completion of tempering
Processing；
S5: it examines: the mass fraction of C and N in the hydraulic part after the completion of tempering is tested；
S6: comparison: the mass fraction of result and standard content C and N after inspection is compared.
2. a kind of hydraulic part Surface hardened layer carbo-nitriding heat treatment process according to claim 1, which is characterized in that described
In S1, with mixture cleaning solution laminate surface 3-6 times of acetone and dehydrated alcohol, is then washed 2-5 times with clear water, finally will again
Hydraulic part surface drying after cleaning is spare.
3. a kind of hydraulic part Surface hardened layer carbo-nitriding heat treatment process according to claim 1, which is characterized in that described
It needs to be heated twice in S2, during normalized treatment, be heated to 800-840 DEG C for the first time and keep 8-15min, second
It is secondary to be heated to 940-1060 DEG C and keep 15-20min.
4. a kind of hydraulic part Surface hardened layer carbo-nitriding heat treatment process according to claim 1, which is characterized in that described
In S2, first time cooling treatment is carried out to hydraulic part using cold air.
5. a kind of hydraulic part Surface hardened layer carbo-nitriding heat treatment process according to claim 1, which is characterized in that described
In S3, hydraulic part is heated to 900-1000 DEG C, keeps the temperature 25-30min.
6. a kind of hydraulic part Surface hardened layer carbo-nitriding heat treatment process according to claim 1, which is characterized in that described
In S3, second of cooling treatment is carried out to hydraulic part using mineral oil.
7. a kind of hydraulic part Surface hardened layer carbo-nitriding heat treatment process according to claim 1, which is characterized in that described
In S4, when hydraulic part is heated to 500-600 DEG C, 45-55min is kept the temperature.
8. a kind of hydraulic part Surface hardened layer carbo-nitriding heat treatment process according to claim 1, which is characterized in that described
In S4, third time cooling treatment is carried out to hydraulic part using water cooling.
9. a kind of hydraulic part Surface hardened layer carbo-nitriding heat treatment process according to claim 1, which is characterized in that described
In S5, after having inspected, inspection result is subjected to record processing.
10. a kind of hydraulic part Surface hardened layer carbo-nitriding heat treatment process according to claim 1, which is characterized in that institute
It states in S6, the control errors of C, N mass fraction after inspection and nominally C, N mass fraction are ± 0.01%.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2291227C1 (en) * | 2005-06-22 | 2007-01-10 | Федеральное Государственное Унитарное Предприятие "Государственный Рязанский Приборный Завод" | Construction-steel parts surface hardening method |
| CN102534465A (en) * | 2012-02-02 | 2012-07-04 | 山东常林机械集团股份有限公司 | Heat treatment process for surface hardening and carbonitriding of hydraulic parts |
| CN108277451A (en) * | 2018-01-23 | 2018-07-13 | 合肥康之恒机械科技有限公司 | A kind of GCr15 profile shafts hold Heat-Treatment of Steel technique |
-
2019
- 2019-10-11 CN CN201910961856.8A patent/CN110512167A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2291227C1 (en) * | 2005-06-22 | 2007-01-10 | Федеральное Государственное Унитарное Предприятие "Государственный Рязанский Приборный Завод" | Construction-steel parts surface hardening method |
| CN102534465A (en) * | 2012-02-02 | 2012-07-04 | 山东常林机械集团股份有限公司 | Heat treatment process for surface hardening and carbonitriding of hydraulic parts |
| CN108277451A (en) * | 2018-01-23 | 2018-07-13 | 合肥康之恒机械科技有限公司 | A kind of GCr15 profile shafts hold Heat-Treatment of Steel technique |
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Application publication date: 20191129 |