CN109338243A - A kind of powder sintered titanium master alloy Heat-Treatment of Steel technique - Google Patents
A kind of powder sintered titanium master alloy Heat-Treatment of Steel technique Download PDFInfo
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- CN109338243A CN109338243A CN201811320769.6A CN201811320769A CN109338243A CN 109338243 A CN109338243 A CN 109338243A CN 201811320769 A CN201811320769 A CN 201811320769A CN 109338243 A CN109338243 A CN 109338243A
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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
- C22C38/36—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.7% by weight of carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
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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
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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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
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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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
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
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- Manufacturing & Machinery (AREA)
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- Crystallography & Structural Chemistry (AREA)
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- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of powder sintered titanium master alloy Heat-Treatment of Steel techniques, include the following steps: S1, main component: C 2.473%, Ti 6%, Cr 3%, Mo 2%, Nb 2%, surplus Fe.Heat treatment process is made of solution strengthening (quenching) and dispersion-strengtherning (tempering)；S2, powder preparation and compression moulding: conventional machinery is crushed, is atomized, physical-chemical process produces powder.Have following advantages compared with prior art: for improving the mechanical property of powder sintered high titanium steel, mainly for following chemical component powder sintered titanium master alloy steel and design: C 2.473%, Ti 6%, Cr 3%, Mo 2%, Nb 2%, surplus Fe.Heat treatment process is made of solution strengthening (quenching) and dispersion-strengtherning (tempering), the powder sintered titanium master alloy steel processed by above-mentioned heat treatment process, its hardness reaches HRC68 (Rockwell hardness) or more, bending strength reaches 1700MPa (megapascal) or more, the performance of prepared titanium master alloy steel can be further increased.
Description
Technical field
The present invention relates to a kind of heat treatment process, more specifically more particularly to a kind of powder sintered titanium master alloy steel
Heat treatment process.
Background technique
Titanium is a kind of important structural metal to grow up the 1950s, and titanium alloy intensity is high, corrosion resistance is good, resistance to
Hot height.The structure titanium of 50~sixties of 20th century, the high-temperature titanium alloy and body that mainly develop aero-engine close
Gold.A collection of corrosion resistant Ti alloy is developed the seventies, since the eighties, corrosion resistant Ti alloy and high-strength titanium alloy are further sent out
Exhibition.Titanium alloy is mainly used for making aircraft engine compressor parts, is secondly rocket, the structural member of guided missile and high-speed aircraft.
Currently, well known titanium alloy steel is obtained by melting, Ti content is less than 2% (wt%), limits
Raising of the titanium elements to the intensity and hardness of steel.Therefore, it applicants have invented a kind of powder sintered titanium master alloy steel, obtains preferably
Effect on this basis, can will be prepared the invention discloses a kind of powder sintered titanium master alloy Heat-Treatment of Steel technique
The performance of titanium master alloy steel further increase, for this purpose, it is proposed that a kind of powder sintered titanium master alloy Heat-Treatment of Steel technique.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, and the powder sintered high titanium of the one kind proposed closes
Golden Heat-Treatment of Steel technique, being capable of bring benefit: for improving the mechanical property of powder sintered high titanium steel, mainly for
The powder sintered titanium master alloy steel of lower chemical component and design: C 2.473%, Ti 6%, Cr 3%, Mo 2%, Nb 2%, it is remaining
Amount is Fe.Heat treatment process is made of solution strengthening (quenching) and dispersion-strengtherning (tempering), is processed by above-mentioned heat treatment process
Powder sintered titanium master alloy steel, hardness reaches HRC68 (Rockwell hardness) or more, and bending strength reaches 1700MPa (megapascal)
More than, the performance of prepared titanium master alloy steel can be further increased.
To achieve the above object, the invention provides the following technical scheme: a kind of powder sintered titanium master alloy Heat-Treatment of Steel
Technique includes the following steps:
S1, main component: C 2.473%, Ti 6%, Cr 3%, Mo 2%, Nb 2%, surplus Fe.Heat treatment process
It is made of solution strengthening (quenching) and dispersion-strengtherning (tempering)；
S2, powder preparation and compression moulding: conventional machinery is crushed, is atomized, physical-chemical process produces powder, the powder produced
By sieving and mixing, mixing is uniform and plasticizer appropriate is added, then is pressed, and the atom between powder passes through solid phase
Diffusion and mechanical snap effect, make product be combined into the entirety with some strength；
S3, sintering: the product of compression moulding being placed in the close furnace using reducing atmosphere and is sintered, sintering temperature
Degree is about 2/3~3/4 times of parent metal fusing point, due to the diffusion of variety classes atom under high temperature, powder oxide on surface
It is reduced and is deformed the recrystallization of powder, powder particle is made to be combined with each other, improves the intensity of sintered metal product, and is obtained
Tissue similar with general alloy.
Preferably, post-process: the density and size shape precision of product can be improved in pressure-sizing processing；To ferrous based powder metallurgical
The processing such as product quenched, surface hardening can improve its mechanical performance；For reach lubrication or anti-corrosion purpose and carry out immersion oil or
Impregnate other liquid lubricants.
Preferably, solution strengthening heat treatment (quenching): the high-vandium steel sample having a size of 30 × 10mm of Φ is placed in heat-treatment furnace
In, 550 DEG C are heated to, keeps the temperature 15 minutes；Continue to be heated to 850 DEG C, keeps the temperature 15 minutes；1080 DEG C are finally heated to, heat preservation 20
Oil is taken out after minute out of furnace and is cooled to room temperature, 80-100 DEG C of cooling rate/S.
Preferably, dispersion-strengtherning heat treatment (tempering): by the powder sintered steel alloy of quenching, being put into heat-treatment furnace,
540 DEG C are heated to, heat preservation after sixty minutes, is taken out after being air-cooled to room temperature.
Preferably, be chemically treated: the process that carbon atom penetrates into is called carburizing by carburizing, steel piece surface, and carburizing is used for low-carbon
Steel and low-alloy steel (0.1-0.25%C), steel of the phosphorus content higher than 0.3% are seldom used, and steel part has after over carburizing and quenching
High surface hardness (HRC=60-65) and wearability, and center still keeps high toughness.
Preferably, blackening process: blackening process belongs to one kind of oxidation treatment method, its main purpose is to make metal watch
Face antirust increases metal surface beauty and gloss, eliminates the stress in quenching process.
Preferably, the powder sintered titanium master alloy steel processed by above-mentioned heat treatment process, hardness reach HRC68
More than (Rockwell hardness), bending strength reaches 1700MPa (megapascal) or more.
Preferably, quenched: the quenched purpose is that steel part is made to obtain very high toughness and enough intensity, is made it have
Good comprehensive mechanical performance, quenched is usually to carry out after part machinery processing, can also be forging stock or by rough machined
It is machined again after light base is quenched.
Technical effect and advantage of the invention: for improving the mechanical property of powder sintered high titanium steel, mainly for
The powder sintered titanium master alloy steel of lower chemical component and design: C 2.473%, Ti 6%, Cr 3%, Mo 2%, Nb 2%, it is remaining
Amount is Fe.Heat treatment process is made of solution strengthening (quenching) and dispersion-strengtherning (tempering), is processed by above-mentioned heat treatment process
Powder sintered titanium master alloy steel, hardness reaches HRC68 (Rockwell hardness) or more, and bending strength reaches 1700MPa (megapascal)
More than, the performance of prepared titanium master alloy steel can be further increased.
Detailed description of the invention
Fig. 1 is the time-temperature relational graph of heat treatment process solution strengthening (quenching) part of the invention；
Fig. 2 is the time-temperature relational graph of heat treatment process dispersion-strengtherning (tempering) part of the invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, to this
Invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not
For limiting the present invention.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work
Every other embodiment obtained is put, shall fall within the protection scope of the present invention.
Embodiment 1:
Refering to fig. 1-2, a kind of powder sintered titanium master alloy Heat-Treatment of Steel technique provided in this embodiment, including walk as follows
It is rapid:
S1, main component: C 2.473%, Ti 6%, Cr 3%, Mo 2%, Nb 2%, surplus Fe.Heat treatment process
It is made of solution strengthening (quenching) and dispersion-strengtherning (tempering)；
S2, powder preparation and compression moulding: conventional machinery is crushed, is atomized, physical-chemical process produces powder, the powder produced
By sieving and mixing, mixing is uniform and plasticizer appropriate is added, then is pressed, and the atom between powder passes through solid phase
Diffusion and mechanical snap effect, make product be combined into the entirety with some strength；
S3, sintering: the product of compression moulding being placed in the close furnace using reducing atmosphere and is sintered, sintering temperature
Degree is about 2/3~3/4 times of parent metal fusing point, due to the diffusion of variety classes atom under high temperature, powder oxide on surface
It is reduced and is deformed the recrystallization of powder, powder particle is made to be combined with each other, improves the intensity of sintered metal product, and is obtained
Tissue similar with general alloy.
Post-processing: the density and size shape precision of product can be improved in pressure-sizing processing；Ferrous based powder metallurgical product is carried out
The processing such as quenching, surface hardening can improve its mechanical performance；Immersion oil is carried out to reach lubrication or anti-corrosion purpose or dipping is other
Liquid lubricant.
Solution strengthening is heat-treated (quenching): the high-vandium steel sample having a size of 30 × 10mm of Φ is placed in heat-treatment furnace, heating
To 550 DEG C, 15 minutes are kept the temperature；Continue to be heated to 850 DEG C, keeps the temperature 15 minutes；Finally be heated to 1080 DEG C, heat preservation after twenty minutes from
Oil is taken out in furnace is cooled to room temperature, 80-100 DEG C of cooling rate/S.
Dispersion-strengtherning is heat-treated (tempering): by the powder sintered steel alloy of quenching, being put into heat-treatment furnace, is heated to
540 DEG C, heat preservation after sixty minutes, is taken out after being air-cooled to room temperature.
Chemical treatment: the process that carbon atom penetrates into is called carburizing by carburizing, steel piece surface, and carburizing is used for mild steel and low conjunction
Jin Gang (0.1-0.25%C), steel of the phosphorus content higher than 0.3% are seldom used, and steel part has high surface after over carburizing and quenching
Hardness (HRC=60-65) and wearability, and center still keeps high toughness.
Blackening process: blackening process belongs to one kind of oxidation treatment method, its main purpose is to make metal surface antirust,
Increase metal surface beauty and gloss, eliminates the stress in quenching process.
The powder sintered titanium master alloy steel processed by above-mentioned heat treatment process, hardness reaches HRC68, and (Rockwell is hard
Degree) more than, bending strength reaches 1700MPa (megapascal) or more.
Quenched: the quenched purpose is that steel part is made to obtain very high toughness and enough intensity, is made it have good
Comprehensive mechanical performance, quenched is usually to carry out after part machinery processing, forging stock or can also pass through rough machined smooth base tune
It is machined again after matter.
In summary: a kind of powder sintered titanium master alloy Heat-Treatment of Steel technique provided by the invention, with prior art phase
Than having following advantages: for improving the mechanical property of powder sintered high titanium steel, mainly for the powder of following chemical component
It is sintered titanium master alloy steel and designs: C 2.473%, Ti 6%, Cr 3%, Mo 2%, Nb 2%, surplus Fe.It is heat-treated work
Skill is made of solution strengthening (quenching) and dispersion-strengtherning (tempering), is closed by the powder sintered high titanium of above-mentioned heat treatment process processing
Jin Gang, hardness reach HRC68 (Rockwell hardness) or more, and bending strength reaches 1700MPa (megapascal) or more, can will be prepared
The performance of titanium master alloy steel further increase.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features,
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (8)
1. a kind of powder sintered titanium master alloy Heat-Treatment of Steel technique, characterized by the following steps:
S1, main component: C 2.473%, Ti 6%, Cr 3%, Mo 2%, Nb 2%, surplus Fe；Heat treatment process is by solid
Molten reinforcing (quenching) and dispersion-strengtherning (tempering) composition；
S2, powder preparation and compression moulding: conventional machinery is crushed, is atomized, physical-chemical process produces powder, and the powder produced passes through
It sieves and mixes, mixing is uniform and plasticizer appropriate is added, then is pressed, and the atom between powder passes through solid-state diffusion
It is acted on mechanical snap, product is made to be combined into the entirety with some strength；
S3, sintering: the product of compression moulding being placed in the close furnace using reducing atmosphere and is sintered, and sintering temperature is about
It is 2/3~3/4 times of parent metal fusing point, due to the diffusion of variety classes atom under high temperature, powder oxide on surface is gone back
Former and deformation powder recrystallization, makes powder particle be combined with each other, improves the intensity of sintered metal product, and obtain and one
As the similar tissue of alloy.
2. a kind of powder sintered titanium master alloy Heat-Treatment of Steel technique according to claim 1, it is characterised in that: rear place
Reason: the density and size shape precision of product can be improved in pressure-sizing processing；Ferrous based powder metallurgical product is quenched, surface is quenched
The processing such as fire can improve its mechanical performance；Immersion oil or the other liquid lubricants of dipping are carried out to reach lubrication or anti-corrosion purpose.
3. a kind of powder sintered titanium master alloy Heat-Treatment of Steel technique according to claim 1, it is characterised in that: solid solution is strong
Change heat treatment (quenching): the high-vandium steel sample having a size of 30 × 10mm of Φ is placed in heat-treatment furnace, is heated to 550 DEG C, heat preservation 15
Minute；Continue to be heated to 850 DEG C, keeps the temperature 15 minutes；1080 DEG C are finally heated to, heat preservation is taken out oil after twenty minutes out of furnace and is cooled to
Room temperature, 80-100 DEG C of cooling rate/S.
4. a kind of powder sintered titanium master alloy Heat-Treatment of Steel technique according to claim 1, it is characterised in that: disperse is strong
Change heat treatment (tempering): by the powder sintered steel alloy of quenching, being put into heat-treatment furnace, be heated to 540 DEG C, keeps the temperature 60 minutes
Afterwards, it takes out after being air-cooled to room temperature.
5. a kind of powder sintered titanium master alloy Heat-Treatment of Steel technique according to claim 1, it is characterised in that: at chemistry
Reason: the process that carbon atom penetrates into is called carburizing by carburizing, steel piece surface, and carburizing is used for mild steel and low-alloy steel (0.1-
0.25%C), steel of the phosphorus content higher than 0.3% is seldom used, and steel part has high surface hardness (HRC=after over carburizing and quenching
60-65) and wearability, and center still keeps high toughness.
6. a kind of powder sintered titanium master alloy Heat-Treatment of Steel technique according to claim 1, it is characterised in that: at nigrescence
Reason: blackening process belongs to one kind of oxidation treatment method, its main purpose is to make metal surface antirust, increases metal surface beauty
Sight and gloss eliminate the stress in quenching process.
7. a kind of powder sintered titanium master alloy Heat-Treatment of Steel technique according to claim 1, it is characterised in that: the warp
The powder sintered titanium master alloy steel of above-mentioned heat treatment process processing is crossed, hardness reaches HRC68 (Rockwell hardness) or more, and bending resistance is strong
Degree reaches 1700MPa (megapascal) or more.
8. a kind of powder sintered titanium master alloy Heat-Treatment of Steel technique according to claim 1, it is characterised in that: quenched:
The quenched purpose is that steel part is made to obtain very high toughness and enough intensity, makes it have good comprehensive mechanical performance,
Quenched is usually to carry out after part machinery processing, can also carry out again machinery forging stock or after rough machined smooth base is quenched
Processing.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110238402A (en) * | 2019-03-27 | 2019-09-17 | 无锡苏明达科技有限公司 | A kind of production method of oxygen sensor pedestal |
| CN111745153A (en) * | 2020-06-10 | 2020-10-09 | 杭州科技职业技术学院 | Alloy powder for preparing turning tool through 3D printing and preparation method thereof |
| CN113714498A (en) * | 2021-08-30 | 2021-11-30 | 苏州鹏贤新材料科技有限公司 | Production process of powder metallurgy high-mechanical-property titanium alloy fastener |
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| CN110238402A (en) * | 2019-03-27 | 2019-09-17 | 无锡苏明达科技有限公司 | A kind of production method of oxygen sensor pedestal |
| CN111745153A (en) * | 2020-06-10 | 2020-10-09 | 杭州科技职业技术学院 | Alloy powder for preparing turning tool through 3D printing and preparation method thereof |
| CN113714498A (en) * | 2021-08-30 | 2021-11-30 | 苏州鹏贤新材料科技有限公司 | Production process of powder metallurgy high-mechanical-property titanium alloy fastener |
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