CN109182958A - A kind of steel structure surface processing method - Google Patents
A kind of steel structure surface processing method Download PDFInfo
- Publication number
- CN109182958A CN109182958A CN201811401590.3A CN201811401590A CN109182958A CN 109182958 A CN109182958 A CN 109182958A CN 201811401590 A CN201811401590 A CN 201811401590A CN 109182958 A CN109182958 A CN 109182958A
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- CN
- China
- Prior art keywords
- resistance furnace
- steel part
- structure surface
- surface processing
- processing method
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Classifications
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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
- C23C8/28—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
-
- 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
- C21D1/58—Oils
-
- 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
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of steel structure surface processing methods.It carries out in the steps below: a, steel part will be put into resistance furnace and be warming up to 860 DEG C~870 DEG C, and kept the temperature 25~30min, carbon potential in resistance furnace is made to reach 1.22；B, cool down to resistance furnace, make temperature in 830~840 DEG C of 2~3h of holding, while being passed through nitrogen into resistance furnace；C, furnace pressure is stablized in 1.15~1.32Mpa, and by the carbon potential in resistance furnace and is down to 0.92；D, steel part is taken out, puts it into quenching oil hardening 15min~20min, later natural cooling；E, after cooling, then steel part is tempered 35~40min at 160~180 DEG C.The present invention has the characteristics that wearability is strong and long service life.
Description
Technical field
The present invention relates to process of surface treatment, especially a kind of steel structure surface processing method.
Background technique
Steel are the essential raw material of modern industry, and steel is needed to reach different mechanics in some equipment components
Performance, this just needs that it is further processed, to improve its yield strength and wearability etc..Such as automobile engine crankshaft,
Force environment is complicated at work for it, by rotary centrifugal force, bending force and torsion energy complicated applied force.Therefore multiple in order to meet
The requirement in heterocycle border, it is necessary to which it possesses enough strength and stiffness, and there are also its surface abrasion resistances.But conventional heat at present
Processing method is after handling it, austenite residual up to 8~10%, therefore bright using the crankshaft stress concentration that the steel are processed
Aobvious, service life is lower.
Summary of the invention
The purpose of the present invention is to provide a kind of steel structure surface processing method.The present invention has wearability strong and uses the longevity
Order long feature.
The invention is realized in this way.A kind of steel structure surface processing method carries out in the steps below:
A, steel part will be put into resistance furnace and is warming up to 860 DEG C~870 DEG C, and kept the temperature 25~30min, reach carbon potential in resistance furnace
1.22；
B, cool down to resistance furnace, make temperature in 830~840 DEG C of 2~3h of holding, while being passed through nitrogen into resistance furnace；
C, furnace pressure is stablized in 1.15~1.32Mpa, and by the carbon potential in resistance furnace and is down to 0.92；
D, steel part is taken out, puts it into quenching oil hardening 15min~20min, later natural cooling；
E, after cooling, then steel part is tempered 35~40min at 160~180 DEG C.
In step a described in steel structure surface processing method above-mentioned, heating rate is carried out by 45~50 DEG C/min.
In step b described in steel structure surface processing method above-mentioned, the flow of nitrogen is 6~6.5L/h.
Compared with prior art, the present invention carries out ascending, descending carbon potential processing before quenching, is passed through nitrogen, which again later
One layer of carbonitrided case can be formed in steel piece surface, effectively increase the mechanical characteristic and wear-resisting property of steel piece surface；This hair
It is bright to have carried out the tempering of 35~40min afterwards after quenching, it has been released effectively the internal stress of steel part, has eliminated the internal flaw of steel part,
Effectively extend the service life of steel part.
Specific embodiment
Embodiment 1.A kind of steel structure surface processing method carries out in the steps below:
A, steel part will be put into resistance furnace and is warming up to 868 DEG C, and kept the temperature 28min, carbon potential in resistance furnace is made to reach 1.22；
B, cool down to resistance furnace, make temperature in 835 DEG C of holding 2.5h, while being passed through nitrogen into resistance furnace；
C, furnace pressure is stablized in 1.2Mpa, and by the carbon potential in resistance furnace and is down to 0.92；
D, steel part is taken out, puts it into quenching oil hardening 18min, later natural cooling；
E, after cooling, then steel part is tempered 38min at 170 DEG C.
Heating rate is carried out by 48 DEG C/min in aforementioned step a
The flow of gas in aforementioned step b are as follows: the flow of nitrogen is 6.2L/h.
Embodiment 2.A kind of steel structure surface processing method carries out in the steps below:
A, steel part will be put into resistance furnace and is warming up to 865 DEG C, and kept the temperature 26min, carbon potential in resistance furnace is made to reach 1.22；
B, cool down to resistance furnace, make temperature in 838 DEG C of holding 2.5h, while being passed through nitrogen into resistance furnace；
C, furnace pressure is stablized in 1.25Mpa, and by the carbon potential in resistance furnace and is down to 0.92；
D, steel part is taken out, puts it into quenching oil hardening 16min, later natural cooling；
E, after cooling, then steel part is tempered 38min at 165 DEG C.
Heating rate is carried out by 48 DEG C/min in aforementioned step a
The flow of gas in aforementioned step b are as follows: the flow of nitrogen is 6.3L/h.
Embodiment 3.A kind of steel structure surface processing method carries out in the steps below:
A, steel part will be put into resistance furnace and is warming up to 860 DEG C DEG C, and kept the temperature 25min, carbon potential in resistance furnace is made to reach 1.22；
B, cool down to resistance furnace, make temperature in 830 DEG C of holding 2h, while being passed through nitrogen into resistance furnace；
C, furnace pressure is stablized in 1.15Mpa, and by the carbon potential in resistance furnace and is down to 0.92；
D, steel part is taken out, puts it into quenching oil hardening 15min, later natural cooling；
E, after cooling, then steel part is tempered 35min at 160 DEG C.
Heating rate is carried out by 45 DEG C/min in aforementioned step a
The flow of gas in aforementioned step b are as follows: the flow of nitrogen is 6L/h.
Embodiment 4.A kind of steel structure surface processing method carries out in the steps below:
A, steel part will be put into resistance furnace and is warming up to 870 DEG C, and kept the temperature 30min, carbon potential in resistance furnace is made to reach 1.22；
B, cool down to resistance furnace, make temperature in 840 DEG C of holding 3h, while being passed through nitrogen into resistance furnace；
C, furnace pressure is stablized in 1.32Mpa, and by the carbon potential in resistance furnace and is down to 0.92；
D, steel part is taken out, puts it into quenching oil hardening 20min, later natural cooling；
E, after cooling, then steel part is tempered 40min at 180 DEG C.
Heating rate is carried out by 50 DEG C/min in aforementioned step a
The flow of gas in aforementioned step b are as follows: the flow of nitrogen is 6.5L/h.
Claims (3)
1. a kind of steel structure surface processing method, it is characterised in that: carry out in the steps below:
A, steel part will be put into resistance furnace and is warming up to 860 DEG C~870 DEG C, and kept the temperature 25~30min, reach carbon potential in resistance furnace
1.22；
B, cool down to resistance furnace, make temperature in 830~840 DEG C of 2~3h of holding, while being passed through nitrogen into resistance furnace；
C, furnace pressure is stablized in 1.15~1.32Mpa, and by the carbon potential in resistance furnace and is down to 0.92；
D, steel part is taken out, puts it into quenching oil hardening 15min~20min, later natural cooling；
E, after cooling, then steel part is tempered 35~40min at 160~180 DEG C.
2. steel structure surface processing method as described in claim 1, it is characterised in that: in the step a, heating rate presses 45
~50 DEG C/min is carried out.
3. steel structure surface processing method as described in claim 1, it is characterised in that: in the step b, the flow of nitrogen is
6~6.5L/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811401590.3A CN109182958A (en) | 2018-11-22 | 2018-11-22 | A kind of steel structure surface processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811401590.3A CN109182958A (en) | 2018-11-22 | 2018-11-22 | A kind of steel structure surface processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109182958A true CN109182958A (en) | 2019-01-11 |
Family
ID=64938158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811401590.3A Withdrawn CN109182958A (en) | 2018-11-22 | 2018-11-22 | A kind of steel structure surface processing method |
Country Status (1)
| Country | Link |
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| CN (1) | CN109182958A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112981751A (en) * | 2021-02-01 | 2021-06-18 | 新沂金垦机械制造有限公司 | Environment-friendly low-noise industrial sewing machine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006037979A (en) * | 2004-07-22 | 2006-02-09 | Aisin Seiki Co Ltd | Gear and its manufacturing method |
| JP2010024535A (en) * | 2008-07-24 | 2010-02-04 | Aisin Seiki Co Ltd | Carburization method for steel |
| CN102230151A (en) * | 2011-07-20 | 2011-11-02 | 新大洲本田摩托有限公司 | Heat treatment process of metal workpiece |
| CN105200201A (en) * | 2015-11-12 | 2015-12-30 | 佳兴紧固件工业（苏州）有限公司 | Method for carbonitriding heat treatment of screws |
| CN106637060A (en) * | 2016-10-20 | 2017-05-10 | 洛阳Lyc轴承有限公司 | Carbonitriding heat treatment technique under new atmosphere |
| CN108004499A (en) * | 2016-10-28 | 2018-05-08 | 贵州福润达汽车配件有限公司 | A kind of automobile crane carbon nitrogen heat treatment method |
-
2018
- 2018-11-22 CN CN201811401590.3A patent/CN109182958A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006037979A (en) * | 2004-07-22 | 2006-02-09 | Aisin Seiki Co Ltd | Gear and its manufacturing method |
| JP2010024535A (en) * | 2008-07-24 | 2010-02-04 | Aisin Seiki Co Ltd | Carburization method for steel |
| CN102230151A (en) * | 2011-07-20 | 2011-11-02 | 新大洲本田摩托有限公司 | Heat treatment process of metal workpiece |
| CN105200201A (en) * | 2015-11-12 | 2015-12-30 | 佳兴紧固件工业（苏州）有限公司 | Method for carbonitriding heat treatment of screws |
| CN106637060A (en) * | 2016-10-20 | 2017-05-10 | 洛阳Lyc轴承有限公司 | Carbonitriding heat treatment technique under new atmosphere |
| CN108004499A (en) * | 2016-10-28 | 2018-05-08 | 贵州福润达汽车配件有限公司 | A kind of automobile crane carbon nitrogen heat treatment method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112981751A (en) * | 2021-02-01 | 2021-06-18 | 新沂金垦机械制造有限公司 | Environment-friendly low-noise industrial sewing machine |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190111 |
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| WW01 | Invention patent application withdrawn after publication |