CN114369706B - HW steel horizontal roll collar heat treatment spray quenching device and heat treatment method thereof - Google Patents
HW steel horizontal roll collar heat treatment spray quenching device and heat treatment method thereof Download PDFInfo
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- CN114369706B CN114369706B CN202111535777.4A CN202111535777A CN114369706B CN 114369706 B CN114369706 B CN 114369706B CN 202111535777 A CN202111535777 A CN 202111535777A CN 114369706 B CN114369706 B CN 114369706B
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- horizontal roll
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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
- C21D1/62—Quenching devices
- C21D1/667—Quenching devices for spray quenching
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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
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- 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
- C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
-
- 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
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention relates to the technical field of horizontal roll collar heat treatment, in particular to a spray quenching device for HW (high-intensity discharge) section steel horizontal roll collar heat treatment and a heat treatment method thereof, wherein the spray quenching device comprises: the motor 5 is electrically connected below the rotary platform 4, the horizontal roll collar 1 is placed on the upper surface of the rotary platform 4, a plurality of movable spray pipes 2 are uniformly distributed around the horizontal roll collar 1, and a plurality of atomizing spray heads 3 are arranged on the movable spray pipes 2; in the horizontal roller ring heat treatment method, the spray quenching device improves the integral strength, hardness, uniformity and wear resistance of the horizontal roller ring.
Description
Technical Field
The invention relates to the technical field of horizontal roll collar heat treatment, in particular to a spray quenching device for HW (high-strength steel) horizontal roll collar heat treatment and a heat treatment method thereof.
Background
The hot rolled H-section is divided into three types of wide flange H-section (HW), middle flange H-section (HM) and narrow flange (HN). The HW is H-shaped steel with basically equal height and flange width, and the wider the flange is, the larger the side item rigidity is, the strong bending resistance is, and the HW is mainly used for steel core columns in reinforced concrete frame structure columns, also called as stiff steel columns, and is mainly used for columns in steel structures. The HW profile steel needs to use a horizontal roll collar in the rolling process, and the HW profile steel has wider flange and deeper side wall depth, namely thicker working layer. The horizontal roll collar is generally made of high-carbon semisteel, the hardness is required to be 60-65HSD during heat treatment, vertical or bedroom spray cooling is generally adopted, the nozzle position is generally aligned to the excircle, the excircle hardness can meet the requirement, the side wall of the horizontal roll collar is insufficient in hardness due to the fact that direct spraying cannot be achieved, and when HW profile steel is rolled, the side wall is not abrasion-resistant and the inner side surface quality of a flange is shown.
Disclosure of Invention
The invention aims to solve the problem of low hardness of the side wall of the horizontal roll collar of HW steel, and adopts the heat treatment method and the heat treatment spray quenching device to improve the overall strength, hardness, uniformity and wear resistance of the horizontal roll collar.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a HW shaped steel horizontal roller ring thermal treatment spouts and quenches device, includes rotary platform (4) below electricity connection motor (5), and rotary platform (4) upper surface places horizontal roller ring (1), and horizontal roller ring (1) evenly distributed a plurality of portable spray tube (2) all around, installs a plurality of atomizer (3) on portable spray tube (2).
The technical scheme of the invention is further improved in that the movable spray pipe (2) is provided with a plurality of vertical spray pipes (6) at four directions of the horizontal roll collar (1), the vertical spray pipes (6) are perpendicular to the rotary platform (4), and the distance between the vertical spray pipes (6) and the end face of the horizontal roll collar is 300-600mm.
The technical scheme of the invention is further improved in that the movable spray pipe (2) is provided with a plurality of horizontal spray pipes (7) at the upper and lower positions of the horizontal roll collar (1), the horizontal spray pipes (7) can be adjusted along with the height of the horizontal roll collar (1), and the distance between the upper and lower horizontal spray pipes (7) and the end face of the horizontal roll collar (1) is 100-200mm.
The technical scheme of the invention is further improved in that a plurality of valves (8) are arranged on the vertical spray pipe (6) and the horizontal spray pipe (7).
A HW section steel horizontal roll collar heat treatment method comprises the following steps:
step 1, placing a HW profile steel horizontal roller ring into a high-temperature furnace, heating to 400-650 ℃, preserving heat for 5-15h, heating to 900-980 ℃ and preserving heat for 10-30h;
step 2, placing the well-insulated HW steel horizontal roll collar on a rotary platform (4) in a spray quenching device, adjusting the direction of a movable spray pipe (2) to enable an atomization spray head (3) to be in place, and opening a switch to spray and cool for 10-40min;
step 3, after spray cooling of the HW section steel horizontal roll collar is finished, closing the spray quenching device, and air cooling for 1-2h;
step 4, tempering the HW steel horizontal roller ring tempering furnace after air cooling, controlling the temperature to be 500-560 ℃ and controlling the tempering heat preservation time to be 50-120h;
and 5, after tempering, detecting the hardness, metallographic structure and stress of the horizontal roller ring.
Compared with the prior art, the HW steel horizontal roll collar heat treatment spray quenching device and the heat treatment method thereof have the beneficial effects that:
1. the invention provides a HW steel horizontal roll collar heat treatment spray quenching device and a heat treatment method thereof, wherein the roll collar is heated to the austenite temperature through a high-temperature furnace, the transformation from austenite to pearlite is realized through spray cooling of the spray quenching device, and the hardness is controlled and the stress is eliminated through high-temperature tempering; the spray quenching device is adopted to cool HW steel horizontal roll collars with different diameters and different thicknesses, so that the overall universality is improved, the upper side wall and the lower side wall of the HW steel horizontal roll collars are uniformly cooled, and the hardness meets the technological requirements; the spray of the spray quenching device adopts a high-pressure plunger pump, the pressure is 30-50Mpa, firstly, high pressure is formed, water is sprayed to form atomization, secondly, stable pressure is realized, and a stable water mist effect is formed; the hardness of two side walls of the product of the heat treatment method is uniform, and the technical requirements of 60-65HSD are met.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a heat treatment spray quenching device for HW section steel horizontal roller rings.
Fig. 2 is a schematic top view of the spray quenching apparatus in fig. 1.
The marks in the figure: 1-a horizontal roll collar; 2-a movable nozzle; 3-atomizing spray heads; 4-rotating a platform; 5-a motor; 6-vertical spray pipes; 7-a horizontal spray pipe; 8-valve.
Detailed Description
The invention is further illustrated by the following examples:
as shown in figures 1 and 2, the spray quenching device for the heat treatment of the HW steel horizontal roll collar comprises two parts, namely a rotating platform 4 for placing a workpiece, and the motor 5 drives the workpiece to uniformly rotate at the rotation speed of 8 revolutions per 1mis; secondly, a movable spray pipe 2 is used for workpiece heat treatment cooling, the spray quenching device is mainly provided with a special atomizing spray head 3 and a high-pressure plunger pump (not shown in the figure) which are connected, a plurality of valves 8 are respectively arranged on a vertical spray pipe 6 and a horizontal spray pipe 7 in the movable spray pipe 2 to realize uniform atomization cooling, wherein the spray quenching device is provided with 4 rows of vertical spray pipes 6 at four directions which are uniformly arranged at an angle of 90 degrees on a rotary platform 4 and used for external circle cooling of a HW steel horizontal roll collar; the spray quenching device is provided with 4 rows of horizontal spray pipes 7 in the upper and lower directions, the upper end face and the lower end face of the HW steel horizontal roll collar 1 are cooled, the spray heads at the lower ends of the 4 rows of horizontal spray pipes 7 are fixedly used for cooling the lower end face of the HW steel horizontal roll collar and are 100-200mm away from the lower end face, and the spray heads at the upper ends can move up and down according to the height of the HW steel horizontal roll collar, so that the nozzle spacing is kept at 100-200mm from the upper end face of the HW steel horizontal roll collar.
A HW section steel horizontal roll collar heat treatment method comprises the following specific steps:
a, firstly, placing a HW section steel horizontal roll collar into a high-temperature normalizing furnace for horizontal placement;
b, starting power transmission and heating to 400-600 ℃, preserving heat for 6-12 h, heating to 900-980 ℃, and preserving heat for 10-20 h;
c, discharging the HW steel horizontal roll collar from the furnace for normalizing, and placing the HW steel horizontal roll collar on a rotary platform 4 by using a special lifting appliance;
d, rapidly adjusting the distance between the vertical spray nozzle and the outer circle to be 300-600mm, and adjusting the distance between the horizontal spray nozzle and the upper end face and the lower end face to be 100-200mm;
e, opening a high-pressure plunger pump, communicating the movable spray pipe 2 around the rotary platform 4, performing spray quenching on the workpiece on the rotary platform 4 for 20-40 min, and cooling the surface to 480-520 ℃;
f, after the spray quenching is finished, closing the high-pressure plunger pump, air-cooling on the rotary platform 4 for 20-30 min, charging and tempering,
g, tempering at 500-560 ℃ for 50-80 hours; and after the furnace is taken out, detecting hardness, stress and metallographic structure.
Example 1
The heat treatment process of the phi 1400HW steel horizontal roll collar is as follows: a. firstly, placing a HW section steel horizontal roll collar into a high-temperature normalizing furnace for horizontal placement; b. then starting power transmission and heating to 450 ℃, preserving heat for 10 hours, heating to 960 ℃, and preserving heat for 18 hours; c. discharging and normalizing the HW steel horizontal roll collar, and placing the HW steel horizontal roll collar on a rotary platform by using a special lifting appliance; d. quickly adjusting the distance between the vertical spray nozzle and the outer circle by 400mm, and the distance between the horizontal spray nozzle and the upper and lower end faces by 150mm; e, opening a high-pressure plunger pump, a rotary platform and other spray quenching devices to carry out spray quenching for 38min, so that the surface temperature is reduced to 500 ℃; f. after the spray quenching is finished, closing a high-pressure plunger pump, air-cooling on a rotary platform, air-cooling for 28min, and charging and tempering; g. the tempering temperature is 540 ℃, and the time is controlled to be 72 hours; after the furnace is discharged, three buses of the outer circle and the side wall are detected to be 120 degrees, and the hardness of the outer circle is 61HSD/62HSD/61HSD, 61HSD/63HRC/61HSD and 60HSD/61HSD/61HSD respectively; the sidewall bond site hardness was 59HSD, 61HSD, 60HSD, respectively; stress σ=124 Mpa, σ=108 Mpa; metallographic structure: pearlite + carbide.
Example 2
The heat treatment process of the phi 1300HW steel horizontal roll collar is as follows: a. firstly, placing a HW section steel horizontal roll collar into a high-temperature normalizing furnace for horizontal placement; b. then starting power transmission and heating to 450 ℃, preserving heat for 10 hours, heating to 960 ℃, and preserving heat for 16 hours; c. discharging and normalizing the HW steel horizontal roll collar, and placing the HW steel horizontal roll collar on a rotary platform by using a special lifting appliance; d. quickly adjusting the distance between the vertical spray nozzle and the outer circle by 450mm, and the distance between the horizontal spray nozzle and the upper and lower end faces by 150mm; e, opening a high-pressure plunger pump, a rotary platform and other spray quenching devices, performing spray quenching for 40min, and cooling the surface to 500 ℃; f. after the spray quenching is finished, closing a high-pressure plunger pump, air-cooling on a rotary platform, air-cooling for 30min, and charging and tempering; g. the tempering temperature is 540 ℃, and the time is controlled to be 64 hours; after the furnace is discharged, three buses of the outer circle and the side wall are detected to be 120 degrees, and the hardness of the outer circle is 63HSD/65HSD/63HSD, 62HSD/65HRC/63HSD, 62HSD/64HSD/62HSD respectively; the sidewall binding layer hardness was 62HSD, 61HSD, 63HSD, respectively; stress σ=136 Mpa, σ=112 Mpa; metallographic structure: pearlite + carbide.
Example 3
The heat treatment process of the phi 1600HW steel horizontal roll collar is as follows: a. firstly, placing a HW section steel horizontal roll collar into a high-temperature normalizing furnace for horizontal placement; b. then starting power transmission and heating to 450 ℃, preserving heat for 12 hours, heating to 960 ℃, and preserving heat for 20 hours; c. discharging and normalizing the HW steel horizontal roll collar, and placing the HW steel horizontal roll collar on a rotary platform by using a special lifting appliance; d. the vertical spray head is quickly adjusted to be 300mm away from the outer circle, and the horizontal spray head is quickly adjusted to be 150mm away from the upper end face and the lower end face; e, opening a high-pressure plunger pump, a rotary platform and other spray quenching devices, performing spray quenching for 40min, and cooling the surface to 500 ℃; f. after the spray quenching is finished, closing a high-pressure plunger pump, air-cooling on a rotary platform, air-cooling for 30min, and charging and tempering; g. the tempering temperature is 540 ℃, and the time is controlled to be 80 hours; after the furnace is discharged, three buses of the outer circle and the side wall are detected to be 120 degrees, and the hardness of the outer circle is 60HSD/62HSD/60HSD, 60HSD/61HRC/60HSD and 59HSD/61HSD/60HSD respectively; the sidewall bond site hardness was 58HSD, 60HSD, 59HSD, respectively; stress σ=130 Mpa, σ=96 Mpa; metallographic structure: pearlite + carbide.
The above embodiments are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (2)
1. A HW steel horizontal roller ring heat treatment method is characterized in that: the adopted spray quenching device comprises a rotary platform (4) with a horizontal roller ring (1) placed on the upper surface, a motor (5) arranged below the rotary platform (4) and electrically connected with the rotary platform (4), a plurality of movable spray pipes (2) uniformly distributed around the horizontal roller ring (1), a plurality of atomizing spray heads (3) arranged on the movable spray pipes (2) and a high-pressure plunger pump connected with the movable spray pipes (2);
the movable spray pipe (2) comprises a plurality of vertical spray pipes (6) and a plurality of horizontal spray pipes (7); the vertical spray pipes (6) are arranged at four directions of the outer circle of the horizontal roll collar (1), the vertical spray pipes (6) are perpendicular to the rotary platform (4), and the distance between the vertical spray pipes (6) and the end face of the outer circle of the horizontal roll collar is 300-600mm; the horizontal spray pipe (7) is arranged at the upper end face and the lower end face of the horizontal roll collar (1), the horizontal spray pipe (7) can be adjusted along with the height of the horizontal roll collar (1), and the distance between the upper end face and the lower end face of the horizontal spray pipe (7) and the end face of the horizontal roll collar (1) is 100-200mm;
the specific HW section steel horizontal roll collar heat treatment method comprises the following steps:
step 1, placing the HW profile steel horizontal roll collar into a high-temperature furnace, heating to 400-650 ℃, preserving heat for 5-15h, heating to 900-980 ℃ and preserving heat for 10-30h;
step 2, placing the well-insulated HW steel horizontal roll collar on a rotary platform (4) in a spray quenching device, adjusting the direction of a movable spray pipe (2) to enable an atomization spray head (3) to be in place, and opening a switch to spray and cool for 10-40min;
step 3, after spray cooling of the HW section steel horizontal roll collar is finished, closing the spray quenching device, and air cooling for 1-2h;
step 4, tempering the HW steel horizontal roller ring tempering furnace after air cooling, controlling the temperature to be 500-560 ℃ and controlling the tempering heat preservation time to be 50-120h;
and 5, after tempering, detecting the hardness, metallographic structure and stress of the horizontal roll collar (1).
2. The heat treatment method for the HW steel horizontal roll collar, according to claim 1, is characterized in that: a plurality of valves (8) are arranged on the vertical spray pipe (6) and the horizontal spray pipe (7).
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|---|---|---|---|
| CN202111535777.4A CN114369706B (en) | 2021-12-15 | 2021-12-15 | HW steel horizontal roll collar heat treatment spray quenching device and heat treatment method thereof |
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| CN202111535777.4A CN114369706B (en) | 2021-12-15 | 2021-12-15 | HW steel horizontal roll collar heat treatment spray quenching device and heat treatment method thereof |
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| CN114369706A CN114369706A (en) | 2022-04-19 |
| CN114369706B true CN114369706B (en) | 2023-08-29 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206872880U (en) * | 2017-06-22 | 2018-01-12 | 成都三强轧辊股份有限公司 | A kind of spray for being applied to production H profile steel collars is quenched cooling device |
| JP2019035155A (en) * | 2018-11-05 | 2019-03-07 | 株式会社ジェイテクト | Heat treatment method |
| CN109722514A (en) * | 2018-12-19 | 2019-05-07 | 中钢集团邢台机械轧辊有限公司 | A kind of MULTILAYER COMPOSITE semi-steel roll collar high temperature quenching heat treatment device and processing method |
| CN111893374A (en) * | 2020-02-04 | 2020-11-06 | 三鑫重工机械有限公司 | Graphite-containing bainite semisteel precision roll ring |
| CN112795740A (en) * | 2020-12-16 | 2021-05-14 | 中钢集团邢台机械轧辊有限公司 | Heat treatment method for angle steel straightening roller and special quenching equipment for heat treatment |
| CN112828256A (en) * | 2020-12-29 | 2021-05-25 | 中钢集团邢台机械轧辊有限公司 | Preparation method of hot-cracking-resistant cast steel roll collar of section steel rail beam universal mill |
-
2021
- 2021-12-15 CN CN202111535777.4A patent/CN114369706B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206872880U (en) * | 2017-06-22 | 2018-01-12 | 成都三强轧辊股份有限公司 | A kind of spray for being applied to production H profile steel collars is quenched cooling device |
| JP2019035155A (en) * | 2018-11-05 | 2019-03-07 | 株式会社ジェイテクト | Heat treatment method |
| CN109722514A (en) * | 2018-12-19 | 2019-05-07 | 中钢集团邢台机械轧辊有限公司 | A kind of MULTILAYER COMPOSITE semi-steel roll collar high temperature quenching heat treatment device and processing method |
| CN111893374A (en) * | 2020-02-04 | 2020-11-06 | 三鑫重工机械有限公司 | Graphite-containing bainite semisteel precision roll ring |
| CN112795740A (en) * | 2020-12-16 | 2021-05-14 | 中钢集团邢台机械轧辊有限公司 | Heat treatment method for angle steel straightening roller and special quenching equipment for heat treatment |
| CN112828256A (en) * | 2020-12-29 | 2021-05-25 | 中钢集团邢台机械轧辊有限公司 | Preparation method of hot-cracking-resistant cast steel roll collar of section steel rail beam universal mill |
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