CN115491633A - Heat treatment method of alloy steel workpiece - Google Patents
Heat treatment method of alloy steel workpiece Download PDFInfo
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- CN115491633A CN115491633A CN202211241589.5A CN202211241589A CN115491633A CN 115491633 A CN115491633 A CN 115491633A CN 202211241589 A CN202211241589 A CN 202211241589A CN 115491633 A CN115491633 A CN 115491633A
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- workpiece
- treatment
- carburizing
- temperature
- furnace
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 23
- 229910000851 Alloy steel Inorganic materials 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000005255 carburizing Methods 0.000 claims abstract description 36
- 238000009792 diffusion process Methods 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 238000010791 quenching Methods 0.000 claims abstract description 11
- 230000000171 quenching effect Effects 0.000 claims abstract description 11
- 238000005496 tempering Methods 0.000 claims abstract description 10
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 5
- 239000003960 organic solvent Substances 0.000 claims abstract description 5
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 30
- 238000002791 soaking Methods 0.000 claims description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 8
- PECPTSUHUFWKDG-IYEMJOQQSA-L barium(2+);(2r,3s,4r,5r)-2,3,4,5,6-pentahydroxyhexanoate Chemical compound [Ba+2].OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O.OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O PECPTSUHUFWKDG-IYEMJOQQSA-L 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 2
- 150000001247 metal acetylides Chemical class 0.000 abstract description 4
- 241001391944 Commicarpus scandens Species 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- C23C8/22—Carburising of ferrous surfaces
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
-
- 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
- C23C8/02—Pretreatment of the material to be coated
-
- 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
- C23C8/80—After-treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The invention discloses a heat treatment method of an alloy steel workpiece. The heat treatment comprises the following steps: after the surface of the workpiece is cleaned, the surface of the non-working surface of the workpiece is subjected to anti-seepage treatment; heating a workpiece to be processed; placing the workpiece in a carburizing furnace; heating and preserving heat in a carburizing furnace, and then performing carburizing treatment and diffusion treatment on the workpiece at the temperature; continuously cooling the temperature in the carburizing furnace and taking out; carrying out staged quenching treatment on the workpiece; taking the workpiece out for air cooling; taking out the quenched workpiece, cleaning in an organic solvent, and drying; and (4) placing the workpiece into a tempering furnace for low-temperature tempering. The invention has the beneficial effects that: before carburizing treatment, the workpiece is subjected to heating treatment, and after carburizing and diffusion treatment, the workpiece is subjected to cooling treatment and then is subjected to stage quenching treatment, so that an alloy steel product is not easy to generate a large amount of carbides, the workpiece is not easy to break, the surface of the workpiece is not oxidized, the deformation is small, the rejection rate is low, and the workpiece is uniformly heated inside and outside and cannot deform.
Description
Technical Field
The invention relates to the field of alloy steel workpiece machining, in particular to a heat treatment method of an alloy steel workpiece.
Background
In large-sized alloy steel, the surface load is large during operation, so that the surface hardness is required to be high, the depth of a hardened layer is required to be deep, the toughness of a core is required to be high, and the core of the product is required to have sufficient strength. Therefore, in the prior art, surface carburization and quenching treatment are generally adopted, the surface hardness is improved, and simultaneously, the core hardness can reach an ideal level, so that the use strength of the surface and the use toughness of the workpiece are ensured. However, alloy steel products are easy to generate a large amount of carbides, the alloy steel products are easy to break during working, the surface of a workpiece is seriously oxidized, the deformation is large, the rejection rate is high, and the workpiece is easy to deform due to uneven internal and external heating.
Disclosure of Invention
The invention aims to provide a heat treatment method of an alloy steel workpiece, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the method comprises the following steps:
step 1: after the surface of the workpiece is cleaned, the surface of the non-working surface of the workpiece is subjected to anti-seepage treatment;
step 2: heating a workpiece to be processed;
and step 3: uniformly and flatly placing the workpiece on a mounting rack, and placing the mounting rack in a carburizing furnace;
and 4, step 4: heating the temperature in a carburizing furnace to 850-900 ℃ and preserving heat for a period of time, then carrying out carburizing treatment and diffusion treatment on the workpiece at the temperature, introducing methanol and liquefied gas into the carburizing furnace, carburizing for 3-5h at the temperature of 850-900 ℃ and carburizing for 2-4h at the temperature of 800-830 ℃ in the diffusion treatment;
and 5: continuously cooling the temperature in the carburizing furnace to 110-120 ℃, and taking out;
step 6: quenching the workpiece: the quenching treatment process comprises the steps of soaking for 600-650 ℃ for the first time, preserving heat for 60-70 minutes, soaking for 820-850 ℃ for the second time, preserving heat for 150-160 minutes, and soaking for 840-900 ℃ for the last time for three times, preserving heat for 5-10 minutes;
and 7: taking the workpiece out for air cooling;
and 8: taking out the quenched workpiece, cleaning in an organic solvent, and drying;
and step 9: and (4) placing the workpiece into a tempering furnace for low-temperature tempering.
Preferably, in the step 1, the surface of the workpiece is cleaned by immersing the workpiece in the barium gluconate solution for 1-2min, and taking out and draining the workpiece.
Preferably, in the step 4, the dropping speed of the methanol is 30-35mL/min, the introducing speed of the liquefied gas is 6-7L/min, and the liquid gas is kept for 300-350min.
Preferably, in the step 4, ammonia gas is also introduced into the carburizing furnace.
Preferably, in the step 2, the temperature of the workpiece to be processed is increased to 600-750 ℃.
Compared with the prior art, the invention has the beneficial effects that: before the carburization treatment, the workpiece is firstly heated, methanol, liquefied gas and ammonia gas are introduced during the carburization treatment, and after the carburization and diffusion treatment, the workpiece is firstly cooled and then quenched in stages, so that alloy steel products are not easy to generate a large amount of carbides, the workpiece is not easy to break during working, the surface of the workpiece cannot be oxidized, the deformation is small, the rejection rate is low, and the workpiece cannot be deformed due to uniform internal and external heating.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1: the embodiment provides a heat treatment method of an alloy steel workpiece, which comprises the following steps:
step 1: after the surface of the workpiece is cleaned, the surface of the non-working surface of the workpiece is subjected to anti-seepage treatment, the surface of the workpiece is cleaned by immersing the workpiece in a barium gluconate solution for 1min, and the workpiece is taken out and drained.
Step 2: and heating the workpiece to be processed to 600 ℃.
And step 3: and (3) uniformly flatly placing the workpiece on the mounting frame, and placing the mounting frame in a carburizing furnace.
And 4, step 4: heating the temperature in a carburizing furnace to 850 ℃ and preserving heat for a period of time, then carrying out carburizing treatment and diffusion treatment on the workpiece at the temperature, introducing methanol, liquefied gas and ammonia gas into the carburizing furnace, wherein the dropping speed of the methanol is 30mL/min, the introducing speed of the liquefied gas is 6L/min, keeping for 300min, the introducing speed of the ammonia gas is 2L/min, keeping for 200min, carburizing for 3h at the temperature of 850 ℃, and carburizing for 2-4h at the temperature of 800 ℃ in the diffusion treatment.
And 5: and continuously cooling the temperature in the carburizing furnace to 110 ℃, and taking out.
Step 6: quenching the workpiece: the quenching treatment process comprises the steps of soaking for 600 ℃ for the first time, preserving heat for 60 minutes, soaking for 820 ℃ for the second time, preserving heat for 150 minutes, soaking for 840 ℃ for the last time, and preserving heat for 5 minutes.
And 7: taking the workpiece out for air cooling.
And 8: taking out the quenched workpiece, cleaning in an organic solvent, and drying.
And step 9: and (4) placing the workpiece into a tempering furnace for low-temperature tempering.
Example 2: the embodiment provides a heat treatment method of an alloy steel workpiece, which comprises the following steps:
step 1: and after the surface of the workpiece is cleaned, performing anti-seepage treatment on the surface of the non-working surface of the workpiece, wherein the cleaning of the surface of the workpiece is to immerse the workpiece into a barium gluconate solution for 2min, and taking out and draining the workpiece.
Step 2: and heating the workpiece to be processed to 750 ℃.
And step 3: and (3) uniformly flatly placing the workpiece on the mounting frame, and placing the mounting frame in a carburizing furnace.
And 4, step 4: heating the temperature in a carburizing furnace to 900 ℃ and preserving heat for a period of time, then carrying out carburizing treatment and diffusion treatment on a workpiece at the temperature, introducing methanol, liquefied gas and ammonia gas into the carburizing furnace, wherein the dropping speed of the methanol is 35mL/min, the introducing speed of the liquefied gas is 7L/min, keeping the temperature for 350min, the introducing speed of the ammonia gas is 3L/min, keeping the temperature for 300min, carburizing for 5h at the temperature of 900 ℃, and carburizing for 2h at the temperature of 830 ℃ in the diffusion treatment.
And 5: and continuously cooling the temperature in the carburizing furnace to 120 ℃, and taking out.
Step 6: quenching the workpiece: the quenching treatment process comprises the steps of soaking 650 ℃ for the first time, preserving heat for 70 minutes, soaking 850 ℃ for the second time, preserving heat for 160 minutes, soaking 900 ℃ for the last time, and preserving heat for 10 minutes.
And 7: taking the workpiece out for air cooling.
And 8: taking out the quenched workpiece, cleaning in an organic solvent, and drying.
And step 9: and (3) putting the workpiece into a tempering furnace for low-temperature tempering.
According to the specific embodiment, before carburization, the workpiece is heated, methanol, liquefied gas and ammonia gas are introduced during carburization, and after carburization and diffusion, the workpiece is cooled and then quenched in stages, so that a large amount of carbides are not easily generated in alloy steel products, the workpiece is not easily broken in work, the surface of the workpiece cannot be oxidized, the deformation is small, the rejection rate is low, and the workpiece cannot be deformed due to even internal and external heating.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A heat treatment method of an alloy steel workpiece is characterized in that: the method comprises the following steps:
step 1: after the surface of the workpiece is cleaned, the surface of the non-working surface of the workpiece is subjected to anti-seepage treatment;
step 2: heating a workpiece to be processed;
and step 3: uniformly and flatly placing the workpiece on a mounting rack, and placing the mounting rack in a carburizing furnace;
and 4, step 4: heating the temperature in a carburizing furnace to 850-900 ℃ and preserving heat for a period of time, then carrying out carburizing treatment and diffusion treatment on the workpiece at the temperature, introducing methanol and liquefied gas into the carburizing furnace, carburizing for 3-5h at the temperature of 850-900 ℃ and carburizing for 2-4h at the temperature of 800-830 ℃ in the diffusion treatment;
and 5: continuously cooling the temperature in the carburizing furnace to 110-120 ℃, and taking out;
step 6: quenching the workpiece: the quenching treatment process comprises the steps of soaking for 600-650 ℃ for the first time, preserving heat for 60-70 minutes, soaking for 820-850 ℃ for the second time, preserving heat for 150-160 minutes, and soaking for 840-900 ℃ for the last time for three times, preserving heat for 5-10 minutes;
and 7: taking the workpiece out for air cooling;
and 8: taking out the quenched workpiece, cleaning in an organic solvent, and drying;
and step 9: and (4) placing the workpiece into a tempering furnace for low-temperature tempering.
2. A method of heat treating a steel alloy workpiece according to claim 1, wherein: in the step 1, the surface of the workpiece is cleaned by immersing the workpiece in barium gluconate solution for 1-2min, taking out the workpiece and draining.
3. A method of heat treating a steel alloy workpiece according to claim 1, wherein: in the step 4, the dropping speed of the methanol is 30-35mL/min, the introducing speed of the liquefied gas is 6-7L/min, and the liquid gas is kept for 300-350min.
4. A method of heat treating a steel alloy workpiece according to claim 1, wherein: and in the step 4, ammonia gas is also introduced into the carburizing furnace.
5. A method of heat treating a steel alloy workpiece according to claim 1, wherein: in the step 2, the workpiece to be processed is heated to 600-750 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211241589.5A CN115491633A (en) | 2022-10-11 | 2022-10-11 | Heat treatment method of alloy steel workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211241589.5A CN115491633A (en) | 2022-10-11 | 2022-10-11 | Heat treatment method of alloy steel workpiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115491633A true CN115491633A (en) | 2022-12-20 |
Family
ID=84474230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211241589.5A Pending CN115491633A (en) | 2022-10-11 | 2022-10-11 | Heat treatment method of alloy steel workpiece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115491633A (en) |
-
2022
- 2022-10-11 CN CN202211241589.5A patent/CN115491633A/en active Pending
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Application publication date: 20221220 |
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