CN106435351B - A kind of steel nitriding top and its processing technology - Google Patents
A kind of steel nitriding top and its processing technology Download PDFInfo
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- CN106435351B CN106435351B CN201610431028.XA CN201610431028A CN106435351B CN 106435351 B CN106435351 B CN 106435351B CN 201610431028 A CN201610431028 A CN 201610431028A CN 106435351 B CN106435351 B CN 106435351B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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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
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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
- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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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
- C23C8/24—Nitriding
- C23C8/26—Nitriding of ferrous surfaces
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Heat Treatment Of Articles (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention discloses a kind of Novel steel nitriding top, the top ingredient includes following component respectively according to mass percent：Carbon：0.10~0.17, silicon：0.17~0.37, manganese：0.30~0.60, sulphur：0~0.035, phosphorus：0~0.035, chromium：0.60~0.90, nickel：2.75~3.15, copper：0~0.030, tantalum：0.05~0.11, the present invention selects special composition proportion, significantly improves its own intensity, toughness；The step of nitriding is added in forging process simultaneously, not only increase the intensity and plasticity of top, more enhance the quenching degree of top, meet the requirement of the high intensity required under heavy load conditions, high rigidity and high tenacity, surface abrasion resistance is good simultaneously, heat treatment deformation is small, there is good comprehensive mechanical property.
Description
Technical field
The invention belongs to machinery equipment field, and in particular to a kind of steel nitriding top and its processing technology.
Background technology
The instrument as seamless steel tube production indispensability is come directly towards, working environment is typically high temperature and pressure, while is ensured again
Top surface there is no any flaw that may influence seamless steel pipe quality, this requirement top must have high intensity, high rigidity with
The speciality of high tenacity, while also because working environment is severe, high intensity, high rigidity and the high tenacity of top is caused to continue shorter, appearance
Being also easy to produce abrasion etc. influences the damage of tube quality.
The content of the invention
To solve the above problems, the invention discloses a kind of steel nitriding top and its processing technology, to be used for solving coming directly towards
The problem of being easily damaged in work process.
A kind of steel nitriding top, includes following component respectively according to mass percent：Carbon：0.10~0.17, silicon：0.17~
0.37, manganese：0.30~0.60, chromium：0.60~0.90, nickel：2.75~3.15, tantalum：0.05~0.11, copper：≤ 0.030, sulphur：≤
0.035, phosphorus：≤0.035.
The manufacturing method of above-mentioned top is：
（1）Stock, raw material are checked and accepted：Blank is prepared according to the weight of top, material component, and 500g~1500g is taken to make
It is rechecked for sample；
（2）Low temperature shove charge：Shove charge after furnace temperature is down to 100 DEG C~800 DEG C in smelting furnace, blank are arranged among smelting furnace；
（3）Heating：After heating makes melting in-furnace temperature rise to 1050 DEG C~1150 DEG C in 30~40 minutes, heating time 2
~8 it is small when, and stop heating after keep the temperature 30~40 minutes；
（4）Forging blank：By step（3）Blank after heating is put into the instruments such as hot forging external mold, locating ring, punch, carries out
Processing forging, begin 1100 DEG C~1150 DEG C of forging Warm degree, 800 DEG C~1000 DEG C of final forging temperature；
（5）Roughing：Step is pressed from both sides using scroll chuck（4）The large end face of blank after forging, correction vehicle put down rear drill centers,
And top workpiece is made to calibration turner outside blank according to top data；
（6）Quenching：By step（5）Top workpiece after processing, which adds in, heats 3~4 hours in glowing furnace, in glowing furnace
Temperature≤200 DEG C, top workpiece are cooled down after being warming up to 780 DEG C~850 DEG C using oil cooling；
（7）Tempering：By step（5）Top workpiece after processing is tempered to 680 DEG C~780 DEG C of temperature, heat preservation 1.5~2
A hour, cooling of coming out of the stove；
（8）Finishing, welding：Vehicle Processing program is worked out according to product design document, to top workpiece configurations finishing, and is being pushed up
Head inside workpiece is welded to connect set, and large end face is finished after welding；
（9）Nitriding：Remove step（8）Grease, rust staining, cut, spot of top workpiece appearance after processing etc., and add in
Oxidation furnace, oxidation furnace initial temperature≤200 DEG C are heated to 1000 DEG C~1200 DEG C or so 2~4 hours of rear heat preservation, come out of the stove
Cool down 10~14 hours.
As a modification of the present invention, the step（4）Blank is cooled down by the way of ash cooling after forging, it is cold
But when the time is 3-6 small.
As a modification of the present invention, the step（7）Top workpiece hardness after processing is 25HRC~28HRC.
As a modification of the present invention, the step（9）Top workpiece hardness after processing is 28HRC~32HRC.
The beneficial effects of the invention are as follows：
A kind of steel nitriding top of the present invention, selects special composition proportion, its own intensity, toughness is made significantly to carry
It is high；The step of nitriding is added in forging technology simultaneously, the intensity and plasticity of top is not only increased, more enhances top
Quenching degree, meets the requirement of the high intensity required under heavy load conditions, high rigidity and high tenacity, at the same surface abrasion resistance it is good,
Heat treatment deformation is small, there is good comprehensive mechanical property.
Specific embodiment
With reference to the accompanying drawings and detailed description, the present invention is furture elucidated, it should be understood that following specific embodiments are only
For illustrating the present invention rather than limiting the scope of the invention.It should be noted that word " preceding " used in the following description,
" rear ", "left", "right", "up" and "down" refer to the direction in attached drawing, and word " interior " and " outer " refer respectively to direction or remote
Direction from particular elements geometric center.
Embodiment 1：
A kind of steel nitriding top, includes following component respectively according to mass percent：Carbon：0.15, silicon：0.29, manganese：
0.45, chromium：0.82, nickel：2.95 tantalum：0.07, copper：0.01, sulphur：0.022, phosphorus：0.01.
The manufacturing method of above-mentioned top is：
（1）Stock, raw material are checked and accepted：Prepare blank according to the weight of top, material component, and take 1200g as sample
It is rechecked；
（2）Low temperature shove charge：Shove charge after furnace temperature is down to 600 DEG C in smelting furnace, blank are arranged among smelting furnace；
（3）Heating：After heating makes melting in-furnace temperature rise to 1150 DEG C in 38 minutes, when heating time is 6 small, and stop adding
40 minutes are kept the temperature after heat；
（4）Forging blank：By step（3）Blank after heating is put into the instruments such as hot forging external mold, locating ring, punch, carries out
Processing forging, begin 1150 DEG C of forging Warm degree, 960 DEG C of final forging temperature；Blank is cooled down by the way of ash cooling after forging, cooling
When time is 5 small
（5）Roughing：Step is pressed from both sides using scroll chuck（4）The large end face of blank after forging, correction vehicle put down rear drill centers,
And top workpiece is made to calibration turner outside blank according to top data；
（6）Quenching：By step（5）Top workpiece after processing adds in 2 hours of heating in glowing furnace, quenches in-furnace temperature
160 DEG C, top workpiece is cooled down after being warming up to 830 DEG C using oil cooling；
（7）Tempering：By step（5）Top workpiece after processing is tempered to 720 DEG C of temperature, keeps the temperature 1.5 hours, comes out of the stove
Cooling, the top workpiece hardness after processing are 28HRC；
（8）Finishing, welding：Vehicle Processing program is worked out according to product design document, to top workpiece configurations finishing, and is being pushed up
Head inside workpiece is welded to connect set, and large end face is finished after welding；
（9）Nitriding：Remove step（8）Grease, rust staining, cut, spot of top workpiece appearance after processing etc., and add in
Oxidation furnace, 140 DEG C of oxidation furnace initial temperature are heated to 1200 DEG C or so 3 hours of rear heat preservation, come out of the stove 11 hours of cooling,
Top workpiece hardness after processing is 31HRC.
| Tensile strength（σb/MPa） | Yield strength（σ0.2/MPa） | Elongation percentage（δ/%） | Notched bar impact strength α kv (J/cm2) | |
| Existing method | 680 | 500 | 6 | 65 |
| The method of the present invention | 810 | 630 | 12 | 80 |
| Increase rate | 19% | 26% | 100% | 23% |
Embodiment 2：
A kind of steel nitriding top, includes following component respectively according to mass percent：Carbon：0.11, silicon：0.29, manganese：
0.55, chromium：0.75, nickel：3.15 tantalum：0.09, sulphur：0.015, phosphorus：0.02.
The manufacturing method of above-mentioned top is：
（1）Stock, raw material are checked and accepted：Prepare blank according to the weight of top, material component, and take 800g as sample
It is rechecked；
（2）Low temperature shove charge：Shove charge after furnace temperature is down to 800 DEG C in smelting furnace, blank are arranged among smelting furnace；
（3）Heating：After heating makes melting in-furnace temperature rise to 1000 DEG C in 30~40 minutes, when heating time is 7 small, and stop
32 minutes are kept the temperature after only heating；
（4）Forging blank：By step（3）Blank after heating is put into the instruments such as hot forging external mold, locating ring, punch, carries out
Processing forging, begin 1150 DEG C of forging Warm degree, and 900 DEG C of final forging temperature is cooled down blank after forging by the way of ash cooling, cold
But when the time is 6 small.；
（5）Roughing：Step is pressed from both sides using scroll chuck（4）The large end face of blank after forging, correction vehicle put down rear drill centers,
And top workpiece is made to calibration turner outside blank according to top data；
（6）Quenching：By step（5）Top workpiece after processing adds in 4 hours of heating in glowing furnace, quenches in-furnace temperature
140 DEG C, top workpiece is cooled down after being warming up to 820 DEG C using oil cooling；
（7）Tempering：By step（5）Top workpiece after processing is tempered to 690 DEG C of temperature, keeps the temperature 1.8 hours, comes out of the stove
Cooling, the top workpiece hardness after processing are 26HRC；
（8）Finishing, welding：Vehicle Processing program is worked out according to product design document, to top workpiece configurations finishing, and is being pushed up
Head inside workpiece is welded to connect set, and large end face is finished after welding；
（9）Nitriding：Remove step（8）Grease, rust staining, cut, spot of top workpiece appearance after processing etc., and add in
Oxidation furnace, 135 DEG C of oxidation furnace initial temperature are heated to 1150 DEG C or so 3.2 hours of rear heat preservation, and cooling of coming out of the stove is 11 small
When, the top workpiece hardness after processing is 31HRC.
| Tensile strength（σb/MPa） | Yield strength（σ0.2/MPa） | Elongation percentage（δ/%） | Notched bar impact strength α kv (J/cm2) | |
| Existing method | 680 | 500 | 6 | 65 |
| The method of the present invention | 750 | 580 | 9 | 95 |
| Increase rate | 10% | 16% | 50% | 46% |
Embodiment 3：
A kind of steel nitriding top, includes following component respectively according to mass percent：Carbon：0.13, silicon：0.32, manganese：
0.55, chromium：0.87, nickel：3.05 tantalum：0.07, copper：0.012.
The manufacturing method of above-mentioned top is：
（1）Stock, raw material are checked and accepted：Prepare blank according to the weight of top, material component, and take 1400g as sample
It is rechecked；
（2）Low temperature shove charge：Shove charge after furnace temperature is down to 720 DEG C in smelting furnace, blank are arranged among smelting furnace；
（3）Heating：After heating makes melting in-furnace temperature rise to 1150 DEG C in 30~40 minutes, when heating time is 7.5 small, and
36 minutes are kept the temperature after stopping heating；
（4）Forging blank：By step（3）Blank after heating is put into the instruments such as hot forging external mold, locating ring, punch, carries out
Processing forging, begin 1150 DEG C of forging Warm degree, and 970 DEG C of final forging temperature is cooled down blank after forging by the way of ash cooling, cold
But when the time is 4 small；
（5）Roughing：Step is pressed from both sides using scroll chuck（4）The large end face of blank after forging, correction vehicle put down rear drill centers,
And top workpiece is made to calibration turner outside blank according to top data；
（6）Quenching：By step（5）Top workpiece after processing adds in 4 hours of heating in glowing furnace, quenches in-furnace temperature
130 DEG C, top workpiece is cooled down after being warming up to 815 DEG C using oil cooling；
（7）Tempering：By step（5）Top workpiece after processing is tempered to 760 DEG C of temperature, keeps the temperature 1.8 hours, comes out of the stove
Cooling, the top workpiece hardness after processing are 27HRC；
（8）Finishing, welding：Vehicle Processing program is worked out according to product design document, to top workpiece configurations finishing, and is being pushed up
Head inside workpiece is welded to connect set, and large end face is finished after welding；
（9）Nitriding：Remove step（8）Grease, rust staining, cut, spot of top workpiece appearance after processing etc., and add in
Oxidation furnace, 120 DEG C of oxidation furnace initial temperature are heated to 1200 DEG C or so 4 hours of rear heat preservation, come out of the stove 12 hours of cooling, add
Top workpiece hardness after work is 30HRC.
| Tensile strength（σb/MPa） | Yield strength（σ0.2/MPa） | Elongation percentage（δ/%） | Notched bar impact strength α kv (J/cm2) | |
| Existing method | 680 | 500 | 6 | 65 |
| The method of the present invention | 800 | 650 | 8 | 85 |
| Increase rate | 18% | 30% | 33% | 31% |
The technical means disclosed in the embodiments of the present invention is not limited only to the technological means disclosed in the above embodiment, further includes
Formed technical solution is combined by more than technical characteristic.
Claims (4)
1. a kind of steel nitriding top, it is characterised in that：The top ingredient includes following component respectively according to mass percent：
Carbon：0.10~0.17, silicon：0.17~0.37, manganese：0.30~0.60, chromium：0.60~0.90, nickel：2.75~3.15, tantalum：0.05
~0.11, copper：≤ 0.030, sulphur：≤ 0.035, phosphorus：≤0.035；
The manufacturing method of top is：
（1）Stock, raw material are checked and accepted：Prepare blank according to the weight of top, material component, and take 500g~1500g as sample
This is rechecked；
（2）Low temperature shove charge：Shove charge after furnace temperature is down to 100 DEG C~800 DEG C in smelting furnace, blank are arranged among smelting furnace；
（3）Heating：After heating makes melting in-furnace temperature rise to 1050 DEG C~1150 DEG C in 30~40 minutes, heating time is small for 2~8
When, and keep the temperature 30~40 minutes after stopping heating；
（4）Forging blank：By step（3）Blank after heating is put into hot forging external mold, locating ring, punch, is processed forging, begins
Forge 1100 DEG C~1150 DEG C of temperature, 800 DEG C~1000 DEG C of final forging temperature；
（5）Roughing：Step is pressed from both sides using scroll chuck（4）The large end face of blank after forging, correction vehicle put down rear drill centers, and
According to top data to calibration turner outside blank, top workpiece is made；
（6）Quenching：By step（5）Top workpiece after processing adds in 3~4 hours of heating in glowing furnace, quenches in-furnace temperature
≤ 200 DEG C, top workpiece is cooled down after being warming up to 780 DEG C~850 DEG C using oil cooling；
（7）Tempering：By step（5）Top workpiece after processing is tempered to 680 DEG C~780 DEG C of temperature, and heat preservation is 1.5~2 small
When, cooling of coming out of the stove；
（8）Finishing, welding：Vehicle Processing program is worked out according to product design document, to top workpiece configurations finishing, and in top work
Part interior welds connector sleeve, large end face is finished after welding；
（9）Nitriding：Remove step（8）The grease of top workpiece appearance after processing, rust staining, cut, spot, and add in oxidation
Stove, oxidation furnace initial temperature≤200 DEG C keep the temperature 2~4 hours after being heated to 1000 DEG C~1200 DEG C, and cooling 10 of coming out of the stove~
14 hours.
2. a kind of steel nitriding top according to claim 1, it is characterised in that：The step（4）Blank is adopted after forging
It is cooled down with the mode of ash cooling, when cooling time is 3-6 small.
3. a kind of steel nitriding top according to claim 1, it is characterised in that：The step（7）Top work after processing
Part hardness is 25HRC~28HRC.
4. a kind of steel nitriding top according to claim 1, it is characterised in that：The step（9）Top work after processing
Part hardness is 28HRC~32HRC.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102089452A (en) * | 2009-05-15 | 2011-06-08 | 新日本制铁株式会社 | Steel for nitrocarburizing and nitrocarburized parts |
| CN102597543A (en) * | 2009-09-10 | 2012-07-18 | 独立行政法人物质·材料研究机构 | High-strength bolt |
| CN103180476A (en) * | 2010-10-20 | 2013-06-26 | 新日铁住金株式会社 | Steel for cold forging/nitriding, steel material for cold forging/nitriding, and cold-forged/nitrided component |
| CN104254628A (en) * | 2012-04-02 | 2014-12-31 | 新日铁住金株式会社 | Steel for cold forging/nitriding, steel material for cold forging/nitriding, and cold forged/nitrided member |
| CN105579607A (en) * | 2013-09-13 | 2016-05-11 | 伊顿公司 | Wear resistant alloy |
| CN105861936A (en) * | 2016-05-10 | 2016-08-17 | 杜树芳 | Heat treatment method for age hardening type nitriding gear steel |
-
2016
- 2016-06-17 CN CN201610431028.XA patent/CN106435351B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102089452A (en) * | 2009-05-15 | 2011-06-08 | 新日本制铁株式会社 | Steel for nitrocarburizing and nitrocarburized parts |
| CN102597543A (en) * | 2009-09-10 | 2012-07-18 | 独立行政法人物质·材料研究机构 | High-strength bolt |
| CN103180476A (en) * | 2010-10-20 | 2013-06-26 | 新日铁住金株式会社 | Steel for cold forging/nitriding, steel material for cold forging/nitriding, and cold-forged/nitrided component |
| CN104254628A (en) * | 2012-04-02 | 2014-12-31 | 新日铁住金株式会社 | Steel for cold forging/nitriding, steel material for cold forging/nitriding, and cold forged/nitrided member |
| CN105579607A (en) * | 2013-09-13 | 2016-05-11 | 伊顿公司 | Wear resistant alloy |
| CN105861936A (en) * | 2016-05-10 | 2016-08-17 | 杜树芳 | Heat treatment method for age hardening type nitriding gear steel |
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| CN106435351A (en) | 2017-02-22 |
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