CN109306395A - A kind of quenched pre- hard processing method of martensitic stain less steel heavy steel plate - Google Patents
A kind of quenched pre- hard processing method of martensitic stain less steel heavy steel plate Download PDFInfo
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- CN109306395A CN109306395A CN201710630516.8A CN201710630516A CN109306395A CN 109306395 A CN109306395 A CN 109306395A CN 201710630516 A CN201710630516 A CN 201710630516A CN 109306395 A CN109306395 A CN 109306395A
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- steel plate
- processing method
- hard processing
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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
- C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
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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
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/60—Aqueous agents
-
- 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
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention discloses a kind of quenched pre- hard processing methods of martensitic stain less steel heavy steel plate, comprising steps of (1) anneals to rear steel plate is rolled；(2) water quenching；(3) temper is handled.Martensitic stain less steel heavy steel plate is handled using the quenched pre- hard processing method of martensitic stain less steel heavy steel plate of the present invention, steel plate can be made not easy to crack, steel plate metallographic structure obtained and hardness are preferable.Since production cost is greatly saved compared to the prior art using water quenching substitution oil quenching in quenched pre- hard processing method of the present invention, further, since oil quenching is not used, it is smaller for environmental pollution.
Description
Technical field
The present invention relates to a kind of preprocess method more particularly to a kind of pre- hard processing methods.
Background technique
Currently, using the pre- hard delivery requirements of BM4Cr13 (4Cr13) corrosion-resistant plastic die steel heavy steel plate, but due to
BM4Cr13 (4Cr13) belongs to high Cr high-alloy steel, and BM4Cr13 (4Cr13) is martensitic stain less steel, not for martensite
It becomes rusty for steel, size is bigger, and cracking, fracture easily occurs in water quenching.And for the hardness requirement of the steel grade between 30-36HRC,
The size requirement of steel plate: thickness meets 60-200mm, and width meets 1150-1350mm, and length meets 2000-10000mm.
Therefore, for martensitic stain less steel heavy steel plate (such as: BM4Cr13) generally use oil quenching+tempering process tune
Matter processing method, this is because can prevent from cracking using oil quenching technique, so that steel plate reaches required hardness and other performances.
However, the oil quenching technique in currently available technology is high for equipment requirement, and environmental pollution is serious, thus,
It is expected that obtain a kind of quenched pre- hard processing method, can for martensitic stain less steel heavy steel plate (such as: BM4Cr13) carry out
Water quenching Pre-hardening treatment, steel plate metallographic structure obtained and hardness number meet needed for production after processing.
Summary of the invention
One of the objects of the present invention is to provide a kind of quenched pre- hard processing methods of martensitic stain less steel heavy steel plate, adopt
Martensitic stain less steel heavy steel plate is handled with the quenched pre- hard processing method, steel plate can be made not easy to crack, obtained
The steel plate metallographic structure and hardness obtained is preferable.
To achieve the goals above, the invention proposes a kind of quenched pre- hard processing sides of martensitic stain less steel heavy steel plate
Method, comprising steps of
(1) it anneals to rolling rear steel plate；
(2) water quenching；
(3) temper is handled.
In quenched pre- hard processing method of the present invention, to martensitic stain less steel heavy steel plate using water quenching substitution oil
It quenches, it is ensured that under the premise of steel plate is indehiscent, then temper processing is carried out, so that steel plate internal stress is eliminated, so that being obtained
Martensitic stain less steel heavy steel plate metallographic structure and hardness number fully meet user usage requirements.
Due to technical solutions according to the invention, life is greatly saved compared to the prior art using water quenching substitution oil quenching
Cost is produced, further, since oil quenching is not used, it is smaller for environmental pollution.
Further, in quenched pre- hard processing method of the present invention, in the step (1), annealing temperature is
It 800-850 DEG C, soaking time 12-16h, is cooled to often after 450 DEG C are then cooled in furnace hereinafter, then going out annealing furnace
Temperature.
Further, in quenched pre- hard processing method of the present invention, in the step (1), with 70-90 DEG C/
The speed of hour is warming up to 800-850 DEG C of annealing temperature.
Further, in quenched pre- hard processing method of the present invention, in the step (2), the water quenching packet
Include step:
Steel plate after annealing is heated to 920-960 DEG C by (2a), keeps the temperature 20-60min；
(2b) carries out water spray continuous coo1ing to the upper and lower surface of steel plate, and cooling velocity is 4-13 DEG C/s, until by steel plate table
Face temperature is cooled to 50 DEG C -180 DEG C；
(2c) carries out air-cooled 1-3h to steel plate in cold bed；
(2d) carries out that heap is cold or incubator slow cooling.
In above scheme, step (2c) is to prevent from making due to inhomogeneous cooling to control the cooling of steel plate upper and lower surface uniformly
It cracks at steel plate, and controls surface of steel plate temperature and be cooled to 50~180 DEG C, further reduced the generation of steel plate cracking.
In addition, it should be noted that, it is surface and steel plate core in order to enable steel plate that cold bed, which carries out air-cooled 1-3h to steel plate,
Portion's temperature is uniform, avoids cracking.
Further, in quenched pre- hard processing method of the present invention, in the step (3), tempering temperature is
500℃-600℃。
Further, in quenched pre- hard processing method of the present invention, in 24 hours after completing the step (2)
It carries out step (3).
Further, in quenched pre- hard processing method of the present invention, the martensitic stain less steel heavy steel plate
Chemical elements in percentage by mass are as follows:
C:0.36-0.45%, Si≤0.6%, Mn≤0.8%, Cr:12-14%, Ni≤0.6%, surplus are Fe and can not
The impurity avoided.
Further, in quenched pre- hard processing method of the present invention, steel plate carries out the step after rolling in 5h
(1), this is to prevent steel plate from cracking to eliminate stress.
Using the quenched pre- hard processing method of martensitic stain less steel heavy steel plate of the present invention to martensitic stain less steel
Heavy steel plate is handled, and steel plate can be made not easy to crack, and steel plate metallographic structure obtained and hardness are preferable.
Since quenched pre- hard processing method of the present invention substitutes oil quenching using water quenching, compared to the prior art, significantly
Production cost is saved, further, since oil quenching is not used, it is smaller for environmental pollution.
Specific embodiment
Below in conjunction with specific embodiments to the quenched pre- hard place of martensitic stain less steel heavy steel plate of the present invention
Reason method and its manufacturing method make further explanation, however the explanation and illustration is not to technical solution of the present invention
Constitute improper restriction.
Embodiment 1-6
Table 1 lists the mass percent of each chemical element of the martensitic stain less steel heavy steel plate of embodiment 1-6.
Table 1. (wt%, surplus are Fe and other inevitable impurity elements other than P, S)
| Number | C | Si | Mn | S | P | Cr | Ni |
| Embodiment 1 | 0.3922 | 0.418 | 0.58 | 0.0024 | 0.0148 | 12.813 | 0.063 |
| Embodiment 2 | 0.4081 | 0.434 | 0.567 | 0.0007 | 0.0151 | 12.938 | 0.063 |
| Embodiment 3 | 0.3952 | 0.444 | 0.549 | 0.0012 | 0.0155 | 12.734 | 0.061 |
| Embodiment 4 | 0.4173 | 0.423 | 0.495 | 0.0008 | 0.0175 | 12.739 | 0.061 |
| Embodiment 5 | 0.4068 | 0.457 | 0.556 | 0.0012 | 0.0105 | 12.828 | 0.059 |
| Embodiment 6 | 0.3935 | 0.455 | 0.526 | 0.0014 | 0.0124 | 12.55 | 0.059 |
The martensitic stain less steel heavy steel plate of embodiment 1-6 is carried out using quenched pre- hard processing method of the present invention
Processing, comprising steps of
(1) it anneals to rolling rear steel plate: being warming up to 800-850 DEG C of annealing temperature with 70-90 DEG C/h of speed,
Soaking time is 12-16h, is cooled to room temperature after 450 DEG C are then cooled in furnace hereinafter, then going out annealing furnace；
(2) water quenching；
(3) temper is handled: tempering temperature is 500 DEG C -600 DEG C.
It should be noted that the water quenching step of each embodiment includes the following steps:
Steel plate after annealing is heated to 920-960 DEG C by (2a), keeps the temperature 20-60min；
(2b) carries out water spray continuous coo1ing to the upper and lower surface of steel plate, and cooling velocity is 4-13 DEG C/s, until by steel plate table
Face temperature is cooled to 50 DEG C -180 DEG C；
(2c) carries out air-cooled 1-3h to steel plate in cold bed；
(2d) carries out that heap is cold or incubator slow cooling.
In addition, each embodiment is completed to carry out step (3) in 24 hours after the step (2), and steel plate is after rolling
The step (1) is carried out in 5h
Table 2 lists the concrete technology of the quenched pre- hard processing method of the martensitic stain less steel heavy steel plate of embodiment 1-6
Parameter.
Table 2.
The size of martensitic stain less steel heavy steel plate obtained in embodiment 1-6 is measured, data obtained
It is listed in Table 3 below.
Table 3.
As can be seen from Table 3, the thickness of the martensitic stain less steel heavy steel plate of each embodiment of this case is in 65-160mm, width
For 1300mm, length is in 7900-8800mm, it can be seen that the quenched pre- hard processing method of this case is suitable for heavy steel plate
On.
In addition, the martensitic stain less steel heavy steel plate for embodiment 1-6 carries out hardness test, the hardness number measured is listed in
Table 4.
Table 4.
As can be seen from Table 4, the hardness number of the martensitic stain less steel heavy steel plate of each embodiment meets life in 30-60HRC
Hardness requirement required for producing.In addition, the martensitic stain less steel heavy steel plate thickness of each embodiment is uniform, in a thickness direction
Each point hardness number difference is smaller.
It should be noted that in this case documented group in the combination of each technical characteristic and unlimited this case claim
Combination documented by conjunction mode or specific embodiment, all technical characteristics that this case is recorded can carry out in any way
Independent assortment combines, unless generating contradiction between each other.
In addition, it is also to be noted that the above list is only specific embodiments of the present invention, it is clear that the present invention is not limited to
Above embodiments have many similar variations therewith.If those skilled in the art is direct from present disclosure
All deformations for exporting or associating, are within the scope of protection of the invention.
Claims (8)
1. a kind of quenched pre- hard processing method of martensitic stain less steel heavy steel plate, which is characterized in that comprising steps of
(1) it anneals to rolling rear steel plate；
(2) water quenching；
(3) temper is handled.
2. quenched pre- hard processing method as described in claim 1, which is characterized in that in the step (1), annealing temperature is
It 800-850 DEG C, soaking time 12-16h, is cooled to often after 450 DEG C are then cooled in furnace hereinafter, then going out annealing furnace
Temperature.
3. quenched pre- hard processing method as claimed in claim 2, which is characterized in that in the step (1), with 70-90 DEG C/
The speed of hour is warming up to 800-850 DEG C of annealing temperature.
4. quenched pre- hard processing method as described in claim 1, which is characterized in that in the step (2), the water quenching packet
Include step:
Steel plate after annealing is heated to 920-960 DEG C by (2a), keeps the temperature 20-60min；
(2b) carries out water spray continuous coo1ing to the upper and lower surface of steel plate, and cooling velocity is 4-13 DEG C/s, until by surface of steel plate temperature
Degree is cooled to 50 DEG C -180 DEG C；
(2c) carries out air-cooled 1-3h to steel plate in cold bed；
(2d) carries out that heap is cold or incubator slow cooling.
5. quenched pre- hard processing method as claimed in claim 4, which is characterized in that in the step (3), tempering temperature is
500℃-600℃。
6. quenched pre- hard processing method as described in claim 4 or 5, which is characterized in that 24 after completing the step (2) are small
When interior progress step (3).
7. quenched pre- hard processing method as described in claim 1, which is characterized in that the martensitic stain less steel heavy steel plate
Chemical elements in percentage by mass are as follows:
C:0.36-0.45%, Si≤0.6%, Mn≤0.8%, Cr:12-14%, Ni≤0.6%, surplus are for Fe and unavoidably
Impurity.
8. quenched pre- hard processing method as described in claim 1, which is characterized in that steel plate carries out the step after rolling in 5h
(1)。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710630516.8A CN109306395B (en) | 2017-07-28 | 2017-07-28 | Quenching and tempering pre-hardening treatment method for martensitic stainless steel large-sized steel plate |
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| CN201710630516.8A CN109306395B (en) | 2017-07-28 | 2017-07-28 | Quenching and tempering pre-hardening treatment method for martensitic stainless steel large-sized steel plate |
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| CN109306395A true CN109306395A (en) | 2019-02-05 |
| CN109306395B CN109306395B (en) | 2020-03-06 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11158551A (en) * | 1997-11-27 | 1999-06-15 | Sumitomo Metal Ind Ltd | Production of martensitic stainless steel pipe |
| CN102392107A (en) * | 2011-11-16 | 2012-03-28 | 东北特殊钢集团有限责任公司 | Quenching method for 20Cr13-40Cr13 martensite stainless steel |
| CN102851607A (en) * | 2011-06-29 | 2013-01-02 | 宝山钢铁股份有限公司 | 110 ksi-Grade oil sleeve having high resistance to CO2 corrosion and its preparation method |
| CN104060054A (en) * | 2014-06-18 | 2014-09-24 | 中信重工机械股份有限公司 | Thermal treatment method of martensitic stainless steel liner plate |
| CN105969945A (en) * | 2016-06-02 | 2016-09-28 | 溧阳市金昆锻压有限公司 | Quenching and high temperature tempering process of 20Cr13 middle piece for pump |
-
2017
- 2017-07-28 CN CN201710630516.8A patent/CN109306395B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11158551A (en) * | 1997-11-27 | 1999-06-15 | Sumitomo Metal Ind Ltd | Production of martensitic stainless steel pipe |
| CN102851607A (en) * | 2011-06-29 | 2013-01-02 | 宝山钢铁股份有限公司 | 110 ksi-Grade oil sleeve having high resistance to CO2 corrosion and its preparation method |
| CN102392107A (en) * | 2011-11-16 | 2012-03-28 | 东北特殊钢集团有限责任公司 | Quenching method for 20Cr13-40Cr13 martensite stainless steel |
| CN104060054A (en) * | 2014-06-18 | 2014-09-24 | 中信重工机械股份有限公司 | Thermal treatment method of martensitic stainless steel liner plate |
| CN105969945A (en) * | 2016-06-02 | 2016-09-28 | 溧阳市金昆锻压有限公司 | Quenching and high temperature tempering process of 20Cr13 middle piece for pump |
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